TWI568845B - A method for dealing with recycled base oil(s) from used oil re-refined process in order to remove aromatic and sulfide - Google Patents

Description

Desulfurization and removal of aromatic hydrocarbons from recycled base oil recovered from waste lubricating oil Method

The invention relates to a method for desulfurizing and removing aromatic hydrocarbons from a regenerated base oil, in particular to an N-Methyl Pyrrolidinone (hereinafter referred to as NMP) as an extractant, and using a short path distiller A method of desulfurizing and removing aromatic hydrocarbons for regenerated base oil recovered from waste lubricating oil by refining and purifying, and the present invention further includes a method for recovering NMP for recycling.

As the price of crude oil continues to increase, the price of base oil, which is used to blend lubricants, continues to rise; and because the quantity is precious, the average price of base oil is almost twice that of fuel oil. many. The source of the base oil, currently 90% is still the mineral base oil obtained from the process of refining crude oil. Therefore, in the case of high crude oil prices, it has been insufficient to treat waste lubricating oil as regenerative fuel oil. In contrast, the base oil still existing in the waste lubricating oil is re-refined and recycled for reuse. The way to make lubricants has gradually gained attention. In fact, the United Nations Environmental Protection Organization and the European Union have successively published a white paper on this issue, encouraging the industry to recycle the base oil from waste lubricating oil for reuse, instead of burning the waste oil as fuel oil. Capital The waste of this material causes environmental problems.

Although the recovery of base oils from waste lubricating oils is a trend, technically, due to the limited technology available on the market, most of them have been used in vacuum distillation or thin film evaporation. The regenerated base oil is distilled off, and then refined with an acid white clay as an adsorption and filtration medium to obtain a marketable saleable base oil (Sellable base oil). However, since the bulk source of waste lubricating oil is the lubricating oil used by the vehicle or called Engine Oil, during the operation of the engine, the fuel oil that cannot be fully burned in the cylinder will eventually penetrate into the lubricating oil and cause the lubricating oil to be in the lubricating oil. The base oil is contaminated with aromatic hydrocarbons and sulfides in the fuel oil, and these aromatic hydrocarbons and sulfides are dissolved in the base oil and cannot be removed by simple filtration or adsorption; therefore, the conventional acid clay is used. The refining method usually only obtains a regenerated base oil with a deep color, a pungent smell, and a low flash point and a low viscosity index, and cannot obtain a high-quality regenerated base oil. The general method is to use these regenerated base oils. Then buy the blended base oil from the refinery to produce the Virgin base oils. Therefore, strictly speaking, this process can only be said to be a pre-treatment process for extracting the recycled base oil from the waste oil. The final product of this process is directly questionable.

In addition, due to the use of acid white clay for the refining of the base oil, a large amount of waste acid soil will be produced after the operation, and if the waste acid soil cannot be completely processed, serious environmental problems will occur. Therefore, in recent years, countries such as Saudi Arabia, the Grand Duchy of the Arabian Arab Republic, and Iran, where the waste lubricating oil processing industry is developed, usually have dusk clauses for those engaged in the recycling of used lubricating oil, requiring these waste lubricating oil recycling plants to have The acid white clay refining process is improved. If the problem of waste acid soil cannot be solved after the term expires, the factory operation license may be cancelled (Suspended). Therefore, these waste lubricating oil processors are technically seeking another way out. This is this A special phenomenon that only happened in a few years.

In addition to the method of refining recycled base oil with acid white clay, large-scale waste lubricating oil processors, especially large-scale processors with a throughput of 10 metric tons per hour (10M3), usually use vacuum distillation or thin film first. The evaporation method distills the regenerated base oil in the waste lubricating oil, and in the subsequent refining process, it is a hydro-treating method, using high-pressure hydrogen as the cracking energy, and is distilled at a high temperature. The longer carbon bond of the regenerated base oil is cut off to obtain a regenerated base oil that is light in color (usually <1.0). However, refining by hydrotreating is highly dangerous because of the danger of explosion if hydrogen is accidentally leaked. Therefore, these factories are located next to the refinery, which reduces the resistance of residents in the surrounding areas. In terms of the high-pressure hydrogen, low-cost hydrogen can be obtained for the process; however, the general waste lubricating oil receiving and processing industry generally does not have the economic ability to set up a large-scale waste lubricating oil treatment plant, and it is impossible to obtain the refinery's Aoyuan energy in refining. A hydrotreating refining plant for regenerating base oil is set up next to the plant. From the current global scale of waste lubricating oil treatment plants, 90% of the plants using hydrorefining in the latter stage are located in the United States, and their investment scale is more than 15 million US dollars. However, most of the small and medium-sized waste lubricating oil processing plants in the world have a large investment scale of only tens of thousands or tens of thousands of dollars, and the annual processing capacity is between several miles and the participation of the public. These operators have no financial ability to go. Establish a large-scale waste lubricating oil refining treatment plant that uses a hydrotreating refining process.

In summary, the current mainstream technologies for refining the base oil regenerated from waste lubricating oil can be classified into (1) a method of filtering and refining by conventional acid clay, and (2) a method of hydrotreating. The former has become a trend because it is not effective and will cause secondary pollution. Another method of hydrorefining with high pressure hydrogen is The investment cost of the equipment is high, and it is not easy to obtain a license for the operation due to operational safety concerns. Therefore, in this environment, it is really necessary to have a new method and a new technology that is different from the traditional method, and that is easy to operate and can be used by the operator.

The present invention provides an improved method for the above-mentioned technical problems of desulfurization and removal of aromatic hydrocarbons from the recycled base oil recovered from waste lubricating oil, so that the technology can be operated safely, efficiently, and operate. The cost can be reduced, in order to enable the recycler of waste lubricating oil to obtain high quality recycled base oil for recycling through the technology of the present invention, in order to slow down the loss rate of the original base oil and reduce the refined base oil refined by the refinery (Virgin Base oils) reduce energy consumption and reduce resource waste. And it can help the waste lubricating oil treatment industry to stop the acid white clay refining process and no longer produce waste acid soil harmful to the environment.

Therefore, the greatest difference between the features of the present invention and other methods of purifying and regenerating base oil using acid white clay is that the refining of the regenerated base oil by the present invention does not cause wastes that cause environmental impact; therefore, the present invention has an environment Friendly environmentally friendly features; in addition, the short-range distillation process used in the present invention is designed to distill materials under high vacuum (low pressure) and relatively low temperature operating conditions, while the relatively low temperature distillation process reflects relatively low energy use. It is a concept of energy saving, and the process for recycling NMP for recycling is also the same; in other words, the invention has relatively low demand for energy, and is closer to the demands of energy conservation and environmental protection. In summary, the present invention differs from other acid white clay refining procedures used for refining recycled base oils in that the present invention has a lower energy consumption rate, meaning lower operating costs, and has no Characteristics of secondary pollution.

Therefore, the present inventors have actively researched and developed the practical experience of petroleum process design and development for many years, and have produced the present invention through actual experiments.

The object of the present invention is to provide NMP (N-Methyl Pyrrolidinone) as an extractant instead of the acid white clay which is conventionally used for refining recycled base oil recovered from waste lubricating oil (White Acid) Clay), in order to regenerate the base oil, remove the aromatic hydrocarbons and sulfides to reduce the chromaticity of the regenerated base oil, and at the same time increase the flash point and viscosity index to improve the regeneration of the base oil. Quality is a method for desulfurizing and removing aromatic hydrocarbons from recycled base oil recovered from waste lubricating oil.

Another object of the present invention is to provide a refining base oil refining in a relatively safe working environment of high vacuum (low pressure) and low temperature by a working system of a short path distiller, without causing secondary pollution, and A method for desulfurizing and removing aromatic hydrocarbons from recycled base oil recovered from waste lubricating oil, which is more safe, energy-saving, and cost-effective to manufacture.

For the above purposes, the present invention comprises a regenerated base oil extraction process, a regenerated base oil centrifugation process, a regenerated base oil refining process, and a utility process; wherein the regenerated base oil extraction process is used for the regeneration The base oil is mixed with NMP for the desulfurization and dearomatization extraction process; and the regenerated base oil is centrifuged, and the regenerated base oil is extracted by the high-speed centrifugal separator to extract the regenerated base oil and the extract. High-speed separation by centrifugal force, as far as possible to remove heavy sulfide and aromatic hydrocarbons, to form a mixture of regenerated base oil and a small amount of extract; and the reclaimed base oil refining process is based on short-distance distillation, including Have: a. several regenerative base oil refining and recovery process material transfer pump, one regenerative base oil refining and recovery process preheater, one regenerative base oil refining and recovery process short-range distillator, one regenerative base oil refining and recovery process heat medium oil expansion tank, one Recycled base oil refining and recycling process heat medium oil heating furnace, a reclaimed base oil refining and recycling process heat medium oil transfer pump, a reclaimed base oil product receiving temporary storage tank, a regenerative base oil refining and recycling process by-product receiving temporary storage tank, a regeneration Base oil refining and recovery process vacuum buffer tank, a regenerated base oil refining and recovery process gas-liquid separator, a regenerative base oil refining and recovery process vacuum pump system, a reclaimed base oil refining and recovery process finished product storage tank, and a reclaimed base oil refining and recycling process finished product a pump, a product receiving storage tank, and a plurality of by-product dispensing pumps; b. using the regenerated base oil refining and recycling process heat medium oil heating furnace and the regenerative base oil refining and recycling process heat medium oil conveying pump to send the heat medium oil The cylinder wall interlayer of the regenerative base oil refining process short-distance distiller and the regenerated base oil are refined back The heating jacket of the process preheater is recycled back to the regenerative base oil refining process heat medium oil heating furnace, and the other heat medium oil is sent to the regenerative base oil refining process heat medium oil expansion tank Recycling back to the regenerative base oil refining recovery process heat medium oil heating furnace until the cylinder wall interlayer of the regenerative base oil refining recovery process short-distance distiller and the heating jacket layer of the regenerated base oil refining recovery process preheater reach After the predetermined working temperature, the regenerated base oil refining and recovery process heat medium oil heating furnace is further intermittently started to maintain the required working temperature; c. by starting the NMP recovery process vacuum pump system, through the NMP recovery process vacuum buffer The tank, the NMP recovery process gas-liquid separator, the NMP recovery process short-distance distiller, the NMP receiving temporary storage tank, and the NMP recovery process by-product receiving temporary storage tank are evacuated until a predetermined working pressure is reached, after which the NMP is recovered. Process vacuum pump system and intermittent start pumping Gas to maintain the required working pressure; d. by one of the NMP recycling process material transfer pump, the NMP and the mixture of the extract produced by the regenerated base oil extraction process are sent to the NMP recovery process preheater for heating, And feeding the NMP recovery process short-distance distiller, and applying the mixture of the NMP and the extract to the surface of the cylinder wall of the NMP recovery process short-distance distiller to form a predetermined thickness by using the scraper provided in the NMP recovery process short-distance distiller The film is heated by the temperature generated by the cylinder wall interlayer of the NMP recovery process and evaporates out the NMP molecules, and the NMP molecules fly to the NMP recovery process by molecular free travel and vacuum pumping. The built-in condenser provided inside the short-range distiller, and then the condenser is used to cool the NMP molecules attached to the surface of the condenser and return to liquid condensed, and then enter the NMP receiving temporary storage tank and send to the NMP recovery process NMP storage. The tank is pumped out by the NMP recovery process NMP; e. and the extract of the mixture of NMP and extract cannot be evaporated by the NMP recovery process to become a molecule Shaped, and gradually falling in the liquid state and falling into the collecting tank below the inside of the NMP recycling process short-distance distiller, and then discharged into the NMP recycling process by-product receiving temporary storage tank and the by-product storage tank sent to the NMP recycling process Then, the NMP recycling process by-products are allocated to the pump.

The utility equipment process uses a cooling water tower and an ice water machine to generate cooling water and ice water for providing cooling water and ice water to the regenerative base oil recovery refining process. And a cold well attached to the outside is used as condensate.

Still another object of the present invention is to provide a method for desulfurizing and removing aromatic hydrocarbons from recycled base oil recovered from waste lubricating oil, which is capable of recovering NMP for recycling.

In order to achieve the above further object, the present invention comprises an NMP recycling process, The NMP recycling process uses short-distance distillation as the core of the operation, including: a. The NMP recycling process includes several NMP recycling process material transfer pumps, an NMP recovery process preheater, an NMP recovery process short-range distiller, and an NMP recycling process. Heat medium oil expansion tank, an NMP recycling process heat medium oil heating furnace, an NMP recycling process heat medium oil transfer pump, an NMP receiving temporary storage tank, an NMP recycling process by-product receiving temporary storage tank, and an NMP recycling process vacuum buffer tank , an NMP recycling process gas-liquid separator, an NMP recycling process vacuum pump system, an NMP recycling process NMP storage tank, an NMP recycling process NMP dispensing pump, an NMP recycling process by-product storage tank, and an NMP recycling process by-product dispensing a pump; b. using the NMP recovery process heat medium oil heating furnace and the NMP recovery process heat medium oil transfer pump to send the heat medium oil to the cylinder wall interlayer of the NMP recovery process short path distiller and the NMP recovery process preheater Heating the jacket layer, recycling back to the NMP recovery process heat medium oil heating furnace, and another heat medium oil is sent to the NMP recovery process heat medium oil expansion tank, and recycled back to the NMP recycling process heat medium The oil heating furnace until the cylinder wall interlayer of the NMP recovery process short-distance distiller and the heating jacket layer of the NMP recovery process preheater reach a predetermined working temperature, and then the furnace is intermittently started to maintain the working temperature; c. by starting the NMP recycling process vacuum pump system, passing the NMP recovery process vacuum buffer tank, the NMP recovery process gas-liquid separator to the NMP recovery process short-range distiller, the NMP receiving temporary storage tank, and the NMP recycling process by-product The temporary storage tank is evacuated until the predetermined working pressure is reached, after which the NMP recovery process vacuum pump system intermittently starts pumping to maintain the required working pressure; d. by one of the NMP recovery process material transfer pumps, The mixed liquid of the NMP and the extract produced by the regenerated base oil extraction process is sent to the NMP recovery process preheater for heating. And feeding the NMP recovery process short-distance distiller, and applying the mixture of the NMP and the extract to the surface of the cylinder wall of the NMP recovery process short-distance distiller to form a predetermined thickness by using the scraper provided in the NMP recovery process short-distance distiller The film is heated by the temperature generated by the cylinder wall interlayer of the NMP recovery process and evaporates out the NMP molecules, and the NMP molecules fly to the NMP recovery process by molecular free travel and vacuum pumping. The built-in condenser provided inside the short-range distiller, and then the condenser is used to cool the NMP molecules attached to the surface of the condenser and return to liquid condensed, and then enter the NMP receiving temporary storage tank and send to the NMP recovery process NMP storage. The trough is pumped out by the NMP recovery process; e. and the extract in the mixture of NMP and extract cannot be evaporated into a molecular form by the NMP recovery process, and gradually falls in a liquid state. And falling into the collecting tank below the inside of the NMP recycling process short-distance distiller, and then discharging with the pipeline into the NMP recycling process by-product receiving temporary storage tank and feeding into the NMP recycling process By-product storage tank, and then to recover NMP process byproducts pump outgoing dialed.

The following is a detailed description of the present invention and the detailed description of the functions and features of the present invention.

10‧‧‧Recycled base oil extraction process

11‧‧‧Renewed base oil blending heating tank

12/13‧‧‧ material transfer pump

14‧‧‧NMP storage tank

15‧‧‧Centrifugal extraction machine

16‧‧‧Receiving buffer tank for reconstituted base oils and extracts

17‧‧‧NMP and extract buffer tank

20‧‧‧Recycled base oil centrifugal separation process

21‧‧‧ material transfer pump

22‧‧‧High speed centrifuge

23‧‧‧Recycled base oil and extract receiving buffer tank

24‧‧‧ by-product receiving storage tank

25‧‧‧ by-product dispensing pump

30‧‧‧Recycled base oil refining and recycling process

31/32/33‧‧‧Recycled base oil refining and recovery process material transfer pump

34‧‧‧Recycled base oil refining and recovery process preheater

35‧‧‧Recycled base oil refining process short-range distiller

351‧‧‧Motor

352‧‧‧Reducer

353‧‧‧Lengjing

354‧‧‧Recycled base oil refining and recycling process material transfer pump

355‧‧‧ material storage tank

36‧‧‧Recycled base oil refining process heat medium oil expansion tank

37‧‧‧Renewable base oil refining and recycling process heat medium oil heating furnace

38‧‧‧Renewable base oil refining and recycling process heat medium oil pump

391‧‧‧Recycled base oil products accepted in the temporary storage tank

392‧‧‧Renewable base oil refining and recycling process by-products received by the temporary storage tank

393‧‧‧Recycled base oil refining process vacuum buffer

394‧‧‧Renewable base oil refining process gas-liquid separator

395‧‧‧Renewable base oil refining and recovery process vacuum pump system

396‧‧‧Recycled base oil refining process finished product storage tank

397‧‧‧Recycled base oil refining and recycling process finished product pump

40‧‧‧Common equipment process

41‧‧‧Cooling tower

42‧‧‧ Ice water unit

43‧‧‧Ice water machine cooling water pump

44‧‧‧Cooling water recovery pump

45/46‧‧‧Cooling water pump

50‧‧‧NMP recycling process

51/52/53‧‧‧NMP recycling process material transfer pump

54‧‧‧NMP recycling process preheater

55‧‧‧NMP recycling process short-range distiller

551‧‧‧Motor

552‧‧‧Reducer

553‧‧‧Lengjing

554‧‧‧NMP recycling process material transfer pump

555‧‧‧NMP material storage tank

56‧‧‧NMP recycling process heat medium oil expansion tank

57‧‧‧NMP recycling process heat medium oil heating furnace

58‧‧‧NMP recycling process heat medium oil pump

591‧‧‧NMP accepts the temporary storage slot

592‧‧‧NMP recycling process by-product accepting slot

593‧‧‧NMP recycling process vacuum buffer tank

594‧‧‧NMP recycling process gas-liquid separator

595‧‧‧NMP Recycling Process Vacuum Pump System

596‧‧‧NMP recycling process NMP storage tank

597‧‧‧NMP recycling process by-product storage tank

598‧‧‧NMP recycling process NMP pump

599‧‧‧NMP recycling process by-product dispensing pump

Fig. 1 is a schematic view showing the system of the regenerated base oil extraction process and the regenerated base oil centrifugal separation process of the present invention.

Fig. 2 is a schematic view showing the system of the reclaimed base oil refining and recycling process of the present invention.

Figure 3 is a schematic diagram of the system of the utility equipment of the present invention.

Figure 4 is a schematic diagram of the system of the NMP recycling process of the present invention.

Referring to Figures 1 to 4, a preferred embodiment of the present invention comprises a Re-refined base oil extraction process 10 and a high speed centrifuge separation process. For re-refined base oil 20, a re-refined base oil recovery process 30, a utility facility process 40, which will be described in detail below.

The regenerated base oil extraction process 10 is used to mix the regenerated base oil with NMP (N-Methyl Pyrrolidinone) for desulfurization and removal of aromatic hydrocarbons.

The regenerated base oil extraction process 10 includes a regenerated base oil blending heating tank 11, a plurality of material transfer pumps 12/13, an NMP storage tank 14 internally provided with a heater, and a centrifugal extractor 15. The receiving buffer base 16 for extracting the regenerated base oil and the extract, and the receiving buffer tank 17 for receiving the extracted NMP and the extract.

When the regenerative base oil extraction process 10 is operated, the regenerated base oil is first heated to 70 ° C in the regenerated base oil blending heating tank 11 , and then continuously fed and maintained at this temperature, and the NMP is heated to 50 ° C in the NMP storage tank 14 . And then continuously feeding and maintaining the temperature; after the two materials reach the preset temperature in the storage tank, the material transfer pumps 12 and 13 are synchronously started, and the two feeds are according to the preset feed ratio. Synchronously transfer the regenerated base oil and NMP to the centrifugal extractor 15 for the extraction process of desulfurization and aromatic removal, and the regenerated base oil and a small amount of extract obtained by the centrifugal extractor 15 enter the extracted regenerated base oil. The extract receives the buffer tank 16, and the NMP and the extract (including a mixture of sulfide and aromatic hydrocarbon) enter the NMP and extract receiving buffer tank 17.

The above-mentioned recycled base oil and NMP preset feed ratio are different depending on the nature of the recycled base oil and the proportion of aromatic hydrocarbons contained; according to the actual operation verification, the ratio of the feed grade of different grades and types of recycled base oil to NMP is Between 2:1 and 1:2.5, that is, the ratio of regenerated base oil can be 1 liter (1 liter), and the ratio of NMP is adjusted according to the concentration of aromatic hydrocarbons and sulfides contained in the regenerated base oil. 0.5 liter (0.5 liter) is increased to 2.5 liters (2.5 liters); however, this feed ratio is slightly modified according to the actual operating temperature of the material during the extraction process.

The regenerated base oil centrifugal separation process 20, the regenerated base oil extraction process 10 is extracted by a high-speed centrifugal separator, and the regenerated base oil and the extract obtained by the extraction are subjected to high-speed separation by centrifugal force, and the heavier specific gravity sulfide is removed as much as possible. An aromatic hydrocarbon, forming a mixture of a regenerated base oil and a small amount of extract, so as to first remove the extracts which can be removed by centrifugal force, thereby reducing the workload of the short-distance distiller of the subsequent regenerated base oil refining process 30, and The process of regenerating the base oil refining process 30 can be accelerated.

The regenerated base oil centrifugal separation process 20 includes a plurality of material transfer pumps 21, a high peed disc separator 22, a regenerated base oil and an extract receiving buffer tank 23, and a by-product receiving storage tank 24, and Several byproducts are dispensed from the pump 25.

When the regenerated base oil centrifugal separation process 20 is temporarily stored in the regenerated base oil after extraction and the liquid level of the extract receiving buffer tank 16 reaches a preset high liquid level, the material transfer pump 21 starts to be activated and will be regenerated. The mixture of the base oil and the extract is sent to the high-speed centrifugal separator 22, and the high-speed centrifugal separator 22 is separated by the difference in specific gravity between the supernatant liquid in the mixed liquid, that is, the extracted base oil after extraction, and the lower liquid, that is, the extract. Two different components are separated at high speed; the separated regenerated base oil follows the pipeline into the regenerated base oil and the extract receiving buffer tank 23, and is extracted The material enters the by-product receiving storage tank 24 according to the pipeline, and waits for the liquid level to reach the preset high liquid level, and then dials out by the by-product dispensing pump 25.

The regenerated base oil refining and recycling process 30 is a short-distance distillation as a working core, and includes: a. the regenerated base oil refining and recycling process 30 includes several regenerative base oil refining and recovery process material transfer pumps 31/32/33, a regeneration Base oil refining process preheater 34, a regenerative base oil refining process Short Path Evaporator 35, a regenerative base oil refining process, a heat medium oil expansion tank 36, a regenerative base oil refining process heat medium Oil heating furnace 37, several regenerative base oil refining and recovery process heat medium oil transfer pump 38, a reclaimed base oil product receiving temporary storage tank 391, a regenerative base oil refining and recycling process by-product receiving temporary storage tank 392, a regenerative base oil refining Recycling process vacuum buffer tank 393, a regenerative base oil refining and recovery process gas-liquid separator 394, a regenerative base oil refining and recovery process vacuum pump system 395, a regenerated base oil product storage tank 396, and a number of reclaimed base oil refining and recycling processes The pump 397, a by-product receiving storage tank 24, and a plurality of by-product dispensing pumps 25.

b. The regenerated base oil refining recovery process 30 starts the regenerative base oil refining and recovery process heat medium oil heating furnace 37 and the regenerated base oil refining recovery process heat medium oil transfer pump 38, and starts to send the heat medium oil through the actual operation. The cylinder wall interlayer of the regenerated base oil refining recovery process short-distance distiller 35 and the heat medium oil heating jacket layer of the regenerated base oil refining recovery process preheater 34 are recycled back to the reclaimed base oil refining recovery process heat medium oil heating furnace 37 And another heat medium oil is sent to the regenerative base oil refining and recovery process heat medium oil expansion tank 36 according to the branch line, and is recycled back to the reclaimed base oil refining and recovery process, the heat medium oil transfer pump 38 inlet is sent to the regenerated base oil refining. Recovering the process heat medium oil heating furnace 37; this preheating process is continued until the cylinder wall interlayer temperature of the regenerated base oil refining process short path distiller 35 and the heat of the regenerated base oil refining process preheater 34 After the medium oil heating jacket layer reaches the preset working temperature, the regenerative base oil refining recovery process heat medium oil heating furnace 37 suspends heating until the temperature of the reheated kerosene after the exothermic temperature is lower than the preset temperature, and the regenerated base oil refining The recovery process heating furnace 37 is restarted for heating; that is, the regenerated base oil refining recovery process heating furnace 37 is further intermittently started to maintain the required operating temperature of the system; and the regenerative base oil refining recovery process is heated by the heat medium oil heating furnace 37. The control of power and temperature is controlled by a Diode type temperature controller (not shown) configured in the system; c. The regenerative base oil refining process 30 is performed by a heat medium oil heating system. At the same time of operation, the regenerative base oil refining and recovery process vacuum pump system 395 is simultaneously started, and begins to regenerate the base oil refining process vacuum buffer tank 393, regenerate the base oil refining process, and the gas-liquid separator 394 to regenerate the base oil refining process short-distance distiller. 35. Recycled base oil products received temporary storage tank 391, recycled base oil refining and recycling process by-products received temporary storage 392 is evacuated until the vacuum pressure inside the pipeline reaches the preset working pressure. Thereafter, the reclaimed base oil refining and recovery process vacuum pump system 395 temporarily stops pumping until the feedstock refinery recovery process short-path distiller is started after the feed is started. 35 The internal working pressure rises, and the regenerative base oil refining and recovery process vacuum pump system 395 starts to start pumping again, that is, the regenerative base oil refining and recovery process vacuum pump 395 is intermittently started to maintain the working pressure required by the system. This mechanism can be Regenerating the base oil refining process of the entire reclaimed base oil refining process 30 The working pressure inside the short-distance distiller 35 is maintained at a preset range during the operation to maintain the stability of the system; d. The system can be started after the preparation is completed. When the regenerated base oil in the regenerated base oil centrifugal separation process 20 and the extract receiving buffer tank 23 reach a high liquid level, the regenerated base oil refining and recovery process material transfer pump 31 starts to be started, and the regenerated base oil centrifugal separation process is 20 shape The mixed liquid of the regenerated base oil and a small amount of the extract is sent to the regenerated base oil refining and recovery process preheater 34 for indirect heating; the material heated by the regenerated base oil refining process preheater 34 is regenerated into the regenerated base oil. The feed distribution tray above the process short-distance distiller 35, and then the discharge gap disposed on the feed distribution plate and diagonally disposed on the suction port falls along the cylinder wall in the regenerative base oil refining process short-range distiller 35 (Cylinder) Entering the regenerative base oil refining process short-range distiller 35; due to the regenerative base oil refining process, the short-distance distiller 35 is internally provided with a set of 4 squeegee modules which are driven by a motor 351 and a reducer 352 to rotate continuously. (also known as the scraper cage, not shown), a row of graphite scrapers (Blade) is arranged in front of the scraper cage, and the spring mechanism behind the graphite scraper pushes the graphite scraper forward and tightly against it. The regenerated base oil refines the cylinder wall within the short-range distiller 35. Therefore, when the material slides down the cylinder wall, the graphite scraper with a continuous rotation speed of about 160-180 RPM will regenerate the foundation. Applying a film of a predetermined thickness on the surface of the cylinder wall of the regenerative base oil refining and recovery process short-distance distiller 35, and refining and recovering the regenerated base oil as the material enters the cylinder wall of the regenerative base oil refining process short-distance distiller 35 from the distribution plate The cylinder wall of the process short-distance distiller 35 is originally in the state of continuous preheating, because the working pressure of the internal 35 of the regenerative base oil refining recovery process and the working temperature have reached the evaporation of the reconstituted base oil refining component to be locked out. Molecular working conditions, therefore, after the material falls into the cylinder wall and is squeezed and applied by the scraper to the surface of the cylinder wall of the regenerative base oil refining process short-circuit distiller 35, the film is subjected to the regeneration basis. The temperature generated by the cylinder wall interlayer of the oil refining recovery process short-distance distiller 35 heats and releases the regenerated base oil molecules, and the regenerated base oil molecules are regenerated by molecular free travel and the regenerated base oil is refined. The process vacuum pump system 395 pumping action flies to the regenerative base oil refining process short range 35 is evaporated inside the set of a condenser (not shown), therefore, these are evaporated The regenerated base oil molecules first contact the condenser on the condenser before passing through the condenser to the suction port, and the regenerative base oil molecules attached to the surface of the condenser are passed by the condenser because there is cooling water inside the condenser. After cooling, it returns to liquid condensed, and then enters the reclaimed base oil product to receive the temporary storage tank 391 according to the lower pipeline, and reclaims the recycled base oil refining process material when the recycled base oil product receives the high liquid level inside the temporary storage tank 391. The transfer pump 32 is automatically started, and the recovered recycled base oil product is sent to the recycled base oil finished product storage tank 396 for transportation, and then the recycled base oil refining and recovery process finished product discharge pump 397 is set aside; e. Regenerated base oil refining and recovery In the process 30, a small amount of the extract adhered to the regenerated base oil contains impure substances such as sulfides and aromatic hydrocarbons, and is fed to the regenerated base oil refining process short-distance distiller 35 in synchronization with the regenerated base oil, but is regenerated. The working pressure and working temperature set in the short-range distiller of the base oil refining and recycling process 30 have not yet reached the distillation of these extracts. The temperature, so that a small amount of the extract of the regenerated base oil and a small amount of the extract cannot be evaporated into a molecular form, and finally, a small amount of the extract of the regenerated base oil and a small amount of the extract is still The liquid liquid appears and slides down the cylinder wall and falls into the inclined lower receiving hopper inside the regenerative base oil refining and recovery process short-distance distiller 35, and then overflows and discharges the regenerative base oil refining and recycling process by-product into the lower storage tank. When the liquid level of the regenerative base oil refining and recovery process by-product receiving the temporary storage tank 392 reaches a high liquid level, the regenerated base oil refining and recovery process material transfer pump 33 is started, and the one product is sent to the by-product storage storage tank 24 for storage, etc. When the liquid level of the by-product receiving storage tank 24 reaches the preset height, the by-product of the reclaimed base oil refining and recycling process is started, and the pumping unit 25 is set aside.

The utility process 40 is for providing cooling water and ice water to the built-in condenser of the regenerative base oil refining process short-path distiller 35 and externally configured cold wells, and NMP The condenser of the NMP recovery process short path distiller 55 of the recycling process 50 and the cold well configured externally are used.

The utility process 40 is provided with a cooling water tower 41, an ice water unit 42, a plurality of ice water cooling water delivery pumps 43, a cooling water recovery pump 44, and a plurality of cooling water delivery pumps 45/46.

When the utility process 40 is operated, the devices included in the common device process 40 are activated one by one, and the ice water and the cooling water are sent to the target device via the chiller cooling water transfer pump 43 and the cooling water transfer pump 45/46. For example, the regenerative base oil refining process short-path distiller 35 and the cooling water inlet line of the NMP recovery process short-distance distiller 55 are returned to the recovery line, and then sent back to the cooling water tower 41 by the cooling water recovery pump 44 for heat dissipation and cooling. When the cooling water is sent out again, it returns to the preset temperature; according to the demand of the system, the temperature of the output cooling water is about 25~28°C, and the temperature of the recovered cooling water is about 30~33°C, and the temperature difference between the two is about 5°C. Therefore, the heat dissipation energy required for the cooling water tower 41, the working pressure and flow rate of the individual cooling water delivery pump, etc. should be based on the individual conditions and requirements of the operating system, and then determined according to the individual design basis. Specifications to meet actual needs.

In one embodiment, the working pressure inside the regenerative base oil refining process short-range distiller 35 is preset to 20-25 Pa (Pascal).

In one embodiment, the operating temperature inside the regenerative base oil refining process short path distiller 35 is 190 to 205 °C.

In one embodiment, the graphite scraper in the reclaimed base oil refining process 30 applies a mixture of the regenerated base oil and a small amount of extract to the surface of the cylinder wall of the regenerated base oil refining process short-path distiller 35 to form a thickness less than 1mm film.

In one embodiment, the regenerated base oil refining process of the reclaimed base oil refining process 30 is connected to a cold well 353, a regenerative base oil refining process, and a material storage tank 355. Because of the evaporation of the regenerative base oil refining process 30, the short-range distiller 35 has a small amount of light hydrocarbons such as C _10~15 H _22~32 , and its molecular weight is more than the preset regeneration. The base oil has a smaller molecular weight and a longer average molecular free path; therefore, these small amounts of light hydrocarbons are vaporized together during operation and are regenerated with a longer molecular free-running regenerative base oil refining process. The built-in condenser of the 35, after entering the pumping passage, is captured in the cold well 353; since these small amounts of light hydrocarbons contain volatile gases, and the preset operating temperature is as high as 190 ° C ~ 205 ° C, to avoid These light hydrocarbon molecules enter the pipeline of the vacuum system causing damage to the regenerated base oil refining process vacuum pump 395, and therefore, in the utility process 40 There is a condensing line in which cold water 353 is continuously introduced into the cold well 353 by using ice water of 5 ° C, and the light hydrocarbon captured in the cold well 353 is condensed at a low temperature of 5 ° C ice water; When the liquid level of the cold well 353 reaches the preset high liquid level, the material in the cold well 353 is emptied by the regenerated base oil refining process material transfer pump 354, and then sent to the material storage tank receiving the light hydrocarbon. 355 is waiting for transportation; the ice water required for this condensing system is provided by the chiller 42 provided by the utility process 40; in operation, the ice water of the preset temperature of 5 ° C manufactured by the chiller 42 is The ice water pump built in the ice water unit 42 is continuously sent to the cold well 353 for condensation, and the condensed cooling water is sent back to the ice water unit 42 for cooling and re-cooling to 5 ° C, and then sent back to the cold well 353; In order to avoid continuous long-term operation, the regenerative base oil refining process is caused by heat transfer. The lubricating oil of the deceleration mechanism outside the short-distance distiller 35 is overheated, causing the reducer 352 to malfunction. Therefore, the ice water sent by the chiller 42 is By one The branch line is guided to the regenerative base oil refining process. The shaft seal cooler of the short path distiller 35 cools the shaft seal, and the used cooling water is recirculated to the condensed water discharged from the cold well 353 and then recirculated to the same. The ice water unit 42 is again cooled.

In one embodiment, the present invention further includes an NMP recovery process 50 for short-path distillation as the core of the operation, comprising: a. The NMP recovery process 50 has a plurality of NMP recovery process material transfer pumps 51. /52/53, an NMP recovery process preheater 54, an NMP recovery process Short Path Evaporator 55, an NMP recovery process heat medium oil expansion tank 56, an NMP recovery process heat medium oil heating furnace 57, An NMP recycling process heat medium oil transfer pump 58, an NMP receiving temporary storage tank 591, an NMP recycling process by-product receiving temporary storage tank 592, an NMP recovery process vacuum buffer tank 593, an NMP recovery process gas-liquid separator 594, a NMP recycling process vacuum pump system 595, an NMP recycling process NMP storage tank 596, an NMP recycling process byproduct storage tank 597, a number of NMP recycling process NMP dispensing pump 598, and a number of NMP recycling process byproduct dispensing pump 599; b. the NMP In the actual operation, the recovery process 50 first starts the NMP recovery process heat medium oil heating furnace 57 and the NMP recovery process heat medium oil transfer pump 58, and starts to send the heat medium oil to the cylinder wall interlayer of the NMP recovery process short path distiller 55 and NMP. return The heat medium oil of the process preheater 54 heats the jacket layer and is recycled back to the NMP recovery process heat medium oil heating furnace 57; and the other heat medium oil is sent to the NMP recovery process heat medium oil expansion tank 56 according to the branch line. Recirculating back to the NMP recovery process, the heat medium oil transfer pump 58 inlet is sent to the NMP recovery process heat medium oil heating furnace 57; this preheating process is continued until the cylinder wall interlayer temperature of the NMP recovery process short path distiller 55 and NMP After the heat medium oil heating jacket layer of the process preheater 54 reaches the preset working temperature, the NMP recovery process heat medium oil heating furnace 57 suspends heating until the hot kerosene returning after the exothermic heat is lower than the preset temperature. After that, the NMP recovery process heating furnace 57 is again started to perform heating; NMP recovery The heating power and temperature control of the process heat medium oil heating furnace 57 is controlled by a diode type temperature controller (Heating Fluid Controller and programmable controller PLC, not shown) configured by the system; While the NMP recovery process 50 heat medium oil heating system is operating, the NMP recovery process vacuum pump system 595 is simultaneously started, and begins to pass the NMP recovery process vacuum buffer tank 593, the NMP recovery process gas-liquid separator 594 to the NMP recovery process short-range distiller 55. The NMP accepts the temporary storage tank 591, and the NMP recycling process by-product accepts the temporary storage tank 592 for vacuuming until the vacuum pressure inside the entire pipeline reaches the preset working pressure, after which the NMP recovery process 50 vacuum pump system 595 suspends pumping. After the start of feeding, the internal working pressure of the short-range distiller rises, and the NMP recovery process vacuum pump system 595 starts pumping again, that is, the NMP recovery process vacuum pump system 595 is intermittently started to maintain the working pressure. This mechanism can be Let the working pressure inside the entire NMP recycling process short-distance distiller 55 remain in the preset range during the operation to maintain the system's Qualitative; d. When the system is ready to be completed, the NMP recovery process material transfer pump 51 starts to start NMP and extracts when the NMP of the regenerated base oil extraction process 10 and the receiving buffer tank 17 of the extract reach a high liquid level. The mixture of materials is sent indirectly through the NMP recovery process preheater 54; the material passing through the NMP recovery process preheater 54 enters the feed distribution tray above the NMP recovery process short path distiller 55, and then on the feed distribution plate The discharge gap with the suction port arranged diagonally falls along the cylinder wall (Cylinder) in the NMP recovery process short-path distiller 55 into the NMP recovery process short-path distiller 55, and a set 4 is provided in the short-path distiller 55 of the NMP recovery process. The upper surface of the motor 551 and the reducer 552 drives a continuously rotating squeegee module (also referred to as a squeegee, not shown). A squeegee (Blade) made of graphite is arranged in front of the squeegee. Bomb behind the scraper The spring mechanism pushes the graphite scraper forward and tightly against the cylinder wall of the NMP recovery process short-range distiller 55. Therefore, when the material slides down the cylinder wall, the graphite scraper rotates at a speed of about 160-180 RPM. The mixture of NMP and extract is applied to the surface of the cylinder wall to form a film of a predetermined thickness, and since the material enters the cylinder wall in the short-circuit distiller 55 of the NMP recovery process from the distribution plate, the cylinder wall is continuously preheated. Because the working pressure inside the NMP recycling process distiller 55 and the working temperature has reached the locked NMP component will be evaporated into a molecular working condition, therefore, the material falls into the cylinder wall and is squeezed by the squeegee. After forming a film on the cylinder wall, the film is heated by the temperature generated by the cylinder wall interlayer of the NMP recovery process distiller 500 and the NMP molecules are released, and the pumping function of the vacuum pump system 595 is performed. The suction port continues to form a relatively low pressure inlet, so that the evaporated NMP molecules begin to move in the direction of the relatively low suction pressure; Because the middle position of the NMP recovery process short-distance distiller 55 is provided with a set of condensers (not shown) from top to bottom, and the NMP molecules fly to the NMP recovery process short-range distiller by the molecular free travel and vacuum pumping assistance. 55 built-in condenser inside, and then the condenser is used to cool the NMP molecules attached to the surface of the condenser and return to liquid condensation, since these evaporated NMP molecules have passed through the condenser before reaching the suction port. The condensing tube on the condenser is contacted, and the cooling water passes through the condensing tube. Therefore, the NMP molecules attached to the surface of the condenser can be cooled and returned to liquid condensed, and then the lower line enters the NMP receiving temporary storage tank 591. When the NMP receiving temporary storage tank 591 reaches a high liquid level, the NMP recovery process material transfer pump 52 is automatically started, and the recovered NMP is sent to the NMP recovery process NMP storage tank 596, and the NMP recovery process NMP storage tank 596 is internally reached. At high liquid level, the NMP recovery process NMP dispensing pump 598 begins to initiate the removal of NMP; e. in the NMP recovery process 50, the previously mixed extract mixture in NMP In the case of impure substances such as sulfides and aromatic hydrocarbons, the preset working pressure and working temperature in the NMP recovery process of the short-distance distiller 55 have not yet reached the distillation temperature of these extracts, so that they are evaporated. The material is still in the liquid state and gradually falls into the inclined collecting tank below the NMP recycling process short-distance distiller 55, and then discharged from the pipeline, and finally discharged into the lower NMP recycling process by-product receiving temporary storage tank 592. When the liquid level of the NMP recovery process by-product receiving the temporary storage tank 592 reaches a high liquid level, the NMP recovery process material transfer pump 53 is started, and the one product is sent to the NMP recycling process by-product storage tank 597 to serve as a by-product of the NMP recovery process. When the interior of the storage tank 597 reaches a high liquid level, the NMP recovery process by-product pump 599 starts to start to remove the by-product; in one embodiment, the working pressure of the NMP recovery process short-range distiller 55 is 20-25 Pa (Pascal ).

In one embodiment, the internal temperature of the NMP recovery process distiller 55 is 110 to 120 °C.

In one embodiment, the graphite scraper in the NMP recycling process 50 applies a mixture of NMP and extract to the surface of the cylinder wall of the NMP recovery process short path distiller 55 to form a film having a thickness of less than 1 mm.

In one embodiment, the short path distiller 55 of the NMP recovery process 50 is coupled to a cold well 553, an NMP recovery process material transfer pump 554, and an NMP material storage tank 555; due to evaporation of the short path distiller 55 in the NMP recovery process During the operation, the extract may contain a very small amount of light hydrocarbons with a small molecular weight such as C _10~15 H _22~32 . These light weight hydrocarbons with a small molecular weight are at a working pressure of 20Pa at 110. It can be evaporated at ~130 ° C operating temperature, because these light hydrocarbons have a small molecular weight and their molecular free travel is longer; therefore, in operation, these very small amounts of light hydrocarbon molecules rely on them. The long molecular free path may escape the built-in condenser of the NMP recovery process short-path distiller 55, enter the extraction channel, and then enter the cold well 553 to be captured; since these light hydrocarbons contain volatile gases and work The temperature is as high as 110~130 °C, in order to avoid the damage of these light hydrocarbon molecules into the pipeline of the vacuum system, causing damage to the NMP recovery process vacuum pump system 595; therefore, the aforementioned The chiller 42 provided in the equipment process 40 will also provide ice water for the condensed water to be continuously introduced into the condensing line of the cold well 553, and the low temperature moment of ice water at 5 ° C will be captured in the cold well 553. The hydrocarbon is condensed; after that, when the liquid level of the cold well 553 reaches a preset high liquid level, the material in the cold well 553 is emptied by the material transfer pump 554 of the NMP recovery process, and then transferred to the light weight receiving The hydrocarbon NMP material storage tank 555 is awaiting transportation; the condensing system is the same set of equipment as the chiller unit 42 provided in the aforementioned utility process 40; during operation, the preset temperature manufactured by the chiller unit 42 is The ice water of 5 °C is continuously transported to the cold well 553 by the ice water pump built in the ice water unit 42 for condensation. The condensed cooling water is sent back to the ice water unit 42 and then cooled down to 5 ° C before being sent back to the cold well. 553; In addition, in order to avoid continuous long-term operation, the lubricating oil of the deceleration mechanism outside the NMP recovery process short-distance distiller 55 is overheated due to heat transfer, causing the reducer 552 to malfunction, and therefore, the ice water sent by the chiller 42 By one The branch line is guided to the shaft seal cooler of the NMP recovery process short-path distiller 55 to cool the shaft seal, and the used cooling water is recirculated to the condensate water discharged from the cold well 553 to be returned to the chiller 42 Re-cooling in the middle.

In summary, the present invention uses NMP as an extractant to extract the regenerated base oil regenerated from waste lubricating oil to replace the conventional hydrotreating and acid white clay refining process, and to make NMP desulfurization and deodorization. Rapid reaction in the extraction process of hydrocarbons for deep desulfurization and dehydration Aromatic hydrocarbons enhance the quality of the regenerated base oil; in addition, the short-distance distiller operating system can recover low-sulfur and low-aromatic hydrocarbon reclaimed base oil and recycle NMP for recycling in a low-temperature, low-pressure safe working environment. A method has the characteristics of not causing secondary pollution, and is more safe in operation, relatively energy-saving, and can save manufacturing cost.

The above embodiments of the present invention are provided for convenience of description only, and the scope of the technology used in the present invention cannot be limited thereby, that is, various transformation designs according to the scope of the listed patent application should be included in The patent scope of this case.

10‧‧‧Recycled base oil extraction process

11‧‧‧Renewed base oil blending heating tank

12/13‧‧‧ material transfer pump

14‧‧‧NMP storage tank

15‧‧‧Centrifugal extraction machine

16‧‧‧Receiving buffer tank for reconstituted base oils and extracts

17‧‧‧NMP and extract buffer tank

20‧‧‧Recycled base oil centrifugal separation process

21‧‧‧ material transfer pump

22‧‧‧High speed centrifuge

23‧‧‧Recycled base oil and extract receiving buffer tank

24‧‧‧ by-product receiving storage tank

25‧‧‧ by-product dispensing pump

30‧‧‧Recycled base oil refining and recycling process

31/32/33‧‧‧Recycled base oil refining and recovery process material transfer pump

34‧‧‧Recycled base oil refining and recovery process preheater

35‧‧‧Recycled base oil refining process short-range distiller

351‧‧‧Motor

352‧‧‧Reducer

353‧‧‧Lengjing

354‧‧‧Recycled base oil refining and recycling process material transfer pump

355‧‧‧ material storage tank

36‧‧‧Recycled base oil refining process heat medium oil expansion tank

37‧‧‧Renewable base oil refining and recycling process heat medium oil heating furnace

38‧‧‧Renewable base oil refining and recycling process heat medium oil pump

391‧‧‧Recycled base oil products accepted in the temporary storage tank

392‧‧‧Renewable base oil refining and recycling process by-products received by the temporary storage tank

393‧‧‧Recycled base oil refining process vacuum buffer

394‧‧‧Renewable base oil refining process gas-liquid separator

395‧‧‧Renewable base oil refining and recovery process vacuum pump system

396‧‧‧Recycled base oil refining process finished product storage tank

397‧‧‧Recycled base oil refining and recycling process finished product pump

40‧‧‧Common equipment process

41‧‧‧Cooling tower

42‧‧‧ Ice water unit

43‧‧‧Ice water machine cooling water pump

44‧‧‧Cooling water recovery pump

45/46‧‧‧Cooling water pump

50‧‧‧NMP recycling process

51/52/53‧‧‧NMP recycling process material transfer pump

54‧‧‧NMP recycling process preheater

55‧‧‧NMP recycling process short-range distiller

551‧‧‧Motor

552‧‧‧Reducer

553‧‧‧Lengjing

554‧‧‧NMP recycling process material transfer pump

555‧‧‧NMP material storage tank

56‧‧‧NMP recycling process heat medium oil expansion tank

57‧‧‧NMP recycling process heat medium oil heating furnace

58‧‧‧NMP recycling process heat medium oil pump

591‧‧‧NMP accepts the temporary storage slot

592‧‧‧NMP recycling process by-product accepting slot

593‧‧‧NMP recycling process vacuum buffer tank

594‧‧‧NMP recycling process gas-liquid separator

595‧‧‧NMP recycling process vacuum pump

596‧‧‧NMP recycling process NMP storage tank

597‧‧‧NMP recycling process by-product storage tank

598‧‧‧NMP recycling process NMP pump

599‧‧‧NMP recycling process by-product dispensing pump

Claims (9)

A method for desulfurizing and removing aromatic hydrocarbons from a recycled base oil recovered from waste lubricating oil, comprising: (1) a regenerated base oil extraction process for using the regenerated base oil with NMP (N-methylpyrrolidone) , N-Methyl Pyrrolidinone) is mixed for desulfurization and dearomatization; and (2) a regenerated base oil centrifugal separation process, the regeneration of the regenerated base oil extraction process by a high-speed centrifugal separator The base oil and the extract are separated by high-speed centrifugal force, and the heavier specific gravity sulfide and aromatic hydrocarbon are removed as much as possible to form a mixed liquid of a regenerated base oil and a small amount of extract; and (3) a regenerated base oil refining and recovery process, The short-distance distillation is the core of the operation, including: a. several regenerative base oil refining and recovery process material transfer pumps, one regenerative base oil refining and recovery process preheater, one regenerative base oil refining and recovery process short-range distiller, one regenerative base oil Refining and recycling process heat medium oil expansion tank, a reclaimed base oil refining and recycling process, heat medium oil heating furnace, a regenerative base oil refining and recycling process, heat medium oil transfer pump, repeated Raw base oil finished product receiving temporary storage tank, a regenerated base oil refining and recycling process by-product receiving temporary storage tank, a reclaimed base oil refining and recovery process vacuum buffer tank, a reclaimed base oil refining and recovery process gas-liquid separator, and a reclaimed base oil refining Recycling process vacuum pump system, a reclaimed base oil refining and recycling process finished product storage tank, a reclaimed base oil refining and recycling process finished product dispensing pump, a by-product receiving storage tank, and several by-product dispensing pumps; b. using the regenerated base oil refining and recovery process heat medium oil heating furnace and the regenerative base oil refining and recovery process, the heat medium oil transfer pump sends the heat medium oil to the cylinder wall interlayer of the regenerative base oil refining process short-distance distiller The heating jacket layer of the regenerated base oil refining process preheater is recycled back to the regenerative base oil refining process heat medium oil heating furnace, and the other heat medium oil is sent to the regenerative base oil refining process heat The medium oil expansion tank is recycled back to the regenerative base oil refining recovery process heat medium oil heating furnace until the cylinder wall interlayer of the regenerative base oil refining recovery process short-distance distiller and the heating of the regenerated base oil refining recovery process preheater After the jacket layer reaches the predetermined working temperature, the regenerative base oil refining recovery process heat medium oil heating furnace is further intermittently started to maintain the required working temperature; c. by starting the regenerative base oil refining recovery process vacuum pump system, Refining the regenerated base oil by the regenerated base oil refining process vacuum buffer tank and the regenerated base oil refining process gas-liquid separator The recycling process short-distance distiller, the recycled base oil product receiving the temporary storage tank, the recycled base oil refining and recycling process by-product is received by the temporary storage tank for vacuuming until the predetermined working pressure is reached, and the recycled base oil refining and recovery process vacuum pump system is re-worked Intermittent start to maintain the required working pressure; d. by one of the regenerated base oil refining and recovery process material transfer pump, the regenerated base oil centrifugal separation process formed by the regenerated base oil and a small amount of the mixture of the mixture is sent The regenerated base oil refining process preheater is heated, and then sent to the regenerative base oil refining and recycling process short-distance distiller, and the regenerated base oil refining process is provided by a scraper disposed inside the short-distance distiller to regenerate the base oil and a small amount. a mixture of extracts applied to the cylinder wall of the regenerative base oil refining process short-range distiller Forming a film of a predetermined thickness on the surface, heating the film by the temperature generated by the cylinder wall interlayer of the regenerated base oil refining process short-path distiller and evaporating the regenerated base oil molecules, and the regenerated base oil molecules are freely molecularly The stroke, and the regenerative base oil refining and recovery process vacuum pumping system pumping action to the condenser provided in the regenerative base oil refining recovery process short-distance distiller, and the condenser will adhere to the regenerative base oil on the surface of the condenser The molecule cools down and returns to liquid condensed, and then enters the regenerated base oil product to receive the temporary storage tank and is sent to the regenerated base oil refining and recovery process finished product storage tank, and then the reclaimed base oil refining and recycling process finished product is discharged from the pump. e. The small amount of the extract of the regenerated base oil and a small amount of extract cannot be evaporated by the refining and recovery process short-distance distiller, and is presented in a liquid state and falls into the regenerative base oil refining process short-range distiller Below, the re-introduction of the recycled base oil refining process by-products is accepted into the temporary storage tank and sent to the by-product The short-distance distiller is connected with a cold well, a regenerative base oil refining and recovery process material conveying pump, a material storage tank; and the short-distance distillation in the reclaimed base oil refining and recycling process is carried out by the storage tank. In the evaporation operation, there are a small amount of light hydrocarbon components, the molecular weight of which is smaller than the molecular weight of the regenerated base oil to be recovered, and the average molecular free path is longer; therefore, in operation, these small amounts of light Hydrocarbons are vaporized together and escape with a longer molecular free-running regenerative base oil refining process. The built-in condenser of the short-path distiller is inserted into the pumping channel and then trapped in the cold well; Light hydrocarbons contain volatile gases with preset operating temperatures up to 190 ° C ~ 205 °C, this configuration can prevent these light hydrocarbon molecules from entering the vacuum system to cause damage to the regenerative base oil refining process vacuum pump; and (4) a common equipment process, borrowing a cooling tower and a chiller To generate cooling water and ice water for providing cooling water and ice water to the regenerative base oil recovery refining process, the condenser provided inside the short-distance distiller and the externally attached cold well are used as condensed water. The method for desulfurizing and removing aromatic hydrocarbons for a recycled base oil recovered from waste lubricating oil according to claim 1, wherein the preset working pressure of the regenerative base oil refining process short-distance distiller is 20~25Pa (Pascal). The method for desulfurizing and removing aromatic hydrocarbons for a recycled base oil recovered from waste lubricating oil, as described in claim 1, wherein the regenerative base oil refining process has a preset working temperature inside the short-distance distiller 190~205°C. A method for desulfurizing and removing aromatic hydrocarbons from a recycled base oil recovered from waste lubricating oil, as described in claim 1, wherein the graphite scraper in the reclaimed base oil refining and recycling process regenerates the base oil and A mixture of a small amount of extract is applied to the surface of the cylinder wall of the regenerative base oil refining process short-distance distiller to form a film having a thickness of less than 1 mm. The method for desulfurizing and removing aromatic hydrocarbons from the recycled base oil recovered from waste lubricating oil according to claim 1, further comprising an NMP recycling process, wherein the NMP recovery process is based on short-distance distillation. Including: a. The NMP recycling process comprises several NMP recycling process material transfer pumps, an NMP recovery process preheater, an NMP recovery process short-range distiller, and an NMP back The process heat medium oil expansion tank, an NMP recycling process heat medium oil heating furnace, an NMP recycling process heat medium oil transfer pump, an NMP receiving temporary storage tank, an NMP recycling process by-product receiving temporary storage tank, and an NMP recycling process vacuum Buffer tank, an NMP recovery process gas-liquid separator, an NMP recovery process vacuum pump system, an NMP recovery process NMP storage tank, an NMP recovery process NMP pump, an NMP recycling process by-product storage tank, and an NMP recycling process by-product Discharging the pump; b. using the NMP recovery process heat medium oil heating furnace and the NMP recovery process heat medium oil transfer pump to send the heat medium oil to the cylinder wall interlayer of the NMP recovery process short path distiller and preheating the NMP recovery process The heating jacket layer is recycled back to the NMP recovery process heat medium oil heating furnace, and the other heat medium oil is sent to the NMP recovery process heat medium oil expansion tank, and recycled to the NMP recovery process heat. The medium oil heating furnace until the cylinder wall interlayer of the NMP recovery process short-distance distiller and the heating jacket layer of the NMP recovery process preheater reach a predetermined working temperature, after which the furnace is intermittently started to maintain Working temperature; c. by starting the NMP recovery process vacuum pump system, passing the NMP recovery process vacuum buffer tank, the NMP recovery process gas-liquid separator to the NMP recovery process short-range distiller, the NMP receiving temporary storage tank, the NMP recovery The process by-product is received by the temporary storage tank for vacuuming until the predetermined working pressure is reached, after which the NMP recovery process vacuum pump system intermittently starts pumping to maintain the required working pressure; d. by one of the NMP recovery process material conveying a pump for delivering a mixture of NMP and extract produced by the regenerated base oil extraction process through the NMP recovery system The preheater is heated, and then sent to the NMP recovery process short-range distiller, and the mixture of NMP and the extract is applied to the cylinder of the NMP recovery process short-distance distiller by the scraper provided in the NMP recovery process short-distance distiller The surface of the wall forms a film of predetermined thickness, which is heated by the temperature generated by the cylinder wall interlayer of the NMP recovery process and evaporates NMP molecules, and the NMP molecules are assisted by molecular free travel and vacuum pumping. Fly to the built-in condenser inside the NMP recycling process short-distance distiller, and then use the condenser to cool the NMP molecules attached to the surface of the condenser and return to liquid condensation, and then enter the NMP receiving temporary storage tank and send Into the NMP recycling process NMP storage tank, and then NMP pumping out of the NMP recovery process; e. and the extract of the mixture of NMP and extract can not be evaporated into the molecular shape by the NMP recovery process short-distance distiller, In the liquid state, it gradually falls and falls into the collecting tank below the inside of the NMP recycling process short-distance distiller, and then discharges into the NMP recycling process by-product to receive the temporary storage tank and send it. The NMP recovery process by-product storage tank, and then to recover NMP process byproducts pump outgoing dialed. The method for desulfurizing and removing aromatic hydrocarbons from the recycled base oil recovered from waste lubricating oil, as described in claim 5, wherein the preset working pressure inside the NMP recovery process short-distance distiller is 20-25 Pa (Pascal). The method for desulfurizing and removing aromatic hydrocarbons from the recycled base oil recovered from waste lubricating oil, as described in claim 5, wherein the NMP recovery process short-range still has an internal working temperature of 110 to 130 ° C. . A method for desulfurizing and removing aromatic hydrocarbons from a recycled base oil recovered from waste lubricating oil, as described in claim 5, wherein the graphite scraper in the NMP recycling process is a mixture of NMP and extract The surface of the cylinder wall coated on the NMP liquid recovery process short-distance distiller forms a film having a thickness of less than 1 mm. A method for desulfurizing and removing aromatic hydrocarbons from a recycled base oil recovered from waste lubricating oil, as described in claim 5, wherein the NMP recovery process in the NMP recovery process is connected to a cold well. The NMP recycling process material transfer pump and an NMP material storage tank enable the light hydrocarbons generated in the NMP recovery process short-distance distiller to enter the cold well, be captured and condensed, and then recovered by the NMP. The process material transfer pump feeds the condensed material in the cold well into the NMP material storage tank for transportation.