CN114984699A - A device and process for removing oil from asphalt tail gas in the production of negative electrode coating material - Google Patents

Abstract

The invention discloses a device and a process for removing oil from asphalt tail gas in the production of a negative electrode coating material, and belongs to the technical field of oil removal. The tail gas deoiling device comprises a water spray tower, a dehydration tank I and a dehydration tank II, after the deoiled asphalt tail gas is treated by the water spray tower, the separated water-oil mixture enters the dehydration tank I to be subjected to oil-water separation, the separated oil enters the dehydration tank II to be further subjected to oil-water separation, and the dehydrated material is output, so that the light oil is recovered. By adopting the device and the process, after oil removal treatment, the major overtemperature hidden danger of the asphalt tail gas in the RTO treatment process is avoided, and the light oil in the asphalt tail gas is recovered.

Description

A device and process for removing oil from asphalt tail gas in the production of negative electrode coating material

technical field

The invention relates to the technical field of oil removal, in particular to a device and a process for removing oil from asphalt tail gas in the production of negative electrode coating materials.

Background technique

In the RTO treatment process of asphalt tail gas in the production of negative electrode cladding materials, due to the presence of light oil in the asphalt tail gas, the combustion temperature of the RTO and the exhaust gas discharge temperature are increased, causing potential safety hazards. The process route of deoiling and recovering light oil before.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a device and process for removing oil from asphalt tail gas in the production of negative electrode coating materials. Light oil.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A deoiling device for asphalt tail gas in the production of negative electrode coating material, comprising a water spray tower, a dehydration tank I and a dehydration tank II. Tank I conducts oil-water separation, the separated oil enters dehydration tank II for further oil-water separation, and the dehydrated material is output, thereby completing light oil recovery; wherein:

Water spray tower: its interior is provided with packing, the top of the packing is provided with a water spray head, the top of the tower is provided with a flue gas outlet, and the bottom of the tower is connected to the middle of dehydration tank I through pipeline II;

Dehydration tank I: The top of the dehydration tank I is connected to a water replenishment pipeline, and an automatic replenishment water pneumatic valve is arranged on the replenishment pipeline. The middle side wall of the dehydration tank I is provided with a water level controller. Connection; dehydration tank I controls the water level of the upper water through the water level controller. When the water level is lower than the water level set by the water level controller, the automatic water replenishment pneumatic valve opens to replenish the water. When the set water level is reached, the automatic replenishment pneumatic valve is automatically closed and the water pump is turned on. The upper opening of the dehydration tank I is connected to the upper part of the dehydration tank II through the pipeline III;

Dehydration tank II: The upper part of the dehydration tank II is opened and connected to the pipeline IV for outputting the final light oil product.

The middle and lower part of the water spray tower (located below the filler) is provided with an asphalt tail gas inlet, which is used for the input of the asphalt tail gas to be deoiled; the spray head in the water spray tower is connected to the pipeline I, and the pipeline I passes through two channels. Each branch is connected to the bottom of the dehydration tank I and the dehydration tank II respectively, and the pipeline I is provided with a water pump. The pretreated asphalt tail gas enters the water spray tower through the asphalt tail gas inlet, and the asphalt flue gas from which the light oil and water have been removed from the treated asphalt tail gas goes up in the water spray tower and is led out from the flue gas outlet. , the light oil and water go to the lower part and enter the dehydration tank I through the pipeline II for rough treatment.

The upper opening of the dehydration tank I is provided with a dehydration tank I automatic control oil specific gravity controller, the pipeline III is provided with a dehydration tank I automatic oil output pneumatic valve, the dehydration tank I automatic oil output pneumatic valve and the dehydration tank I automatic control The oil specific gravity controller is connected.

The upper opening of the dehydration tank II is provided with a dehydration tank II automatic control oil specific gravity controller, a dehydration tank II automatic oil outlet pneumatic valve is arranged on the pipeline IV connected to the dehydration tank II, and the dehydration tank II automatic oil outlet pneumatic valve is connected with the The dehydration tank II is connected with the controller for the specific gravity of the oil to be automatically controlled.

The lower part of the dehydration tank II is provided with a dehydration tank II automatic water outlet specific gravity controller, and the branch connected to the pipeline I at the bottom of the dehydration tank II is provided with a dehydration tank II automatic water outlet control valve. The dehydration tank II automatically controls the outlet water specific gravity controller and Dehydration tank II is connected with the automatic water outlet control valve.

The bottoms of the dehydration tank I and the dehydration tank II are both designed as cone-shaped structures.

The process of removing oil from asphalt tail gas in the production of negative electrode coating material by using the device includes the following steps:

(1) Set the water supply water level in the dehydration tank I, and open the automatic pneumatic valve for replenishing water to perform water supply. When the water level in the dehydration tank I reaches the set water level, close the automatic pneumatic valve for replenishing water, and the water pump is turned on;

(2) The asphalt tail gas to be treated enters the water spray tower. After the asphalt tail gas is separated in the packing layer, the asphalt flue gas goes up in the water spray tower and is led out from the upper part of the spray tower, while the light oil and water go to the water spray tower. The lower part of the tower goes into the dehydration tank I for rough treatment to separate the oil and water; the water is in the middle and lower layers of the dehydration tank I and enters the water spray tower by the water pump, and the oil in the upper layer of the dehydration tank I is automatically controlled by the dehydration tank I. Controlled by the specific gravity controller, if the specific gravity is not satisfied, the automatic oil outlet pneumatic valve of the dehydration tank I is closed, and if the specific gravity is satisfied, the automatic oil outlet pneumatic valve of the dehydration tank I is opened, and the oil in the dehydration tank I enters the dehydration tank II;

(3) The material (oil) input from the dehydration tank I to the dehydration tank II is separated from oil and water again, and the separated water is automatically controlled by the dehydration tank II at the lower part of the dehydration tank II. The valve is opened when the specific gravity is satisfied, and the valve is closed when the specific gravity is not satisfied; the separated oil is automatically controlled by the upper dehydration tank II of the dehydration tank II. .

In the above-mentioned step (1), the upper water level is set to be 0.5-1.5 meters, preferably 0.8-1.2 meters;

In the above-mentioned step (2), the specific gravity of the oil in the upper part of the dehydration tank I is controlled to be 0.90-0.95;

In the above step (3), the specific gravity of the oil at the upper part of the dehydration tank II is controlled to be 0.85-0.90, preferably 0.85-0.88, and the specific gravity of the water at the bottom of the dehydration tank II is controlled to be 1.000.

The design principle and beneficial effects of the present invention are as follows:

The asphalt exhaust gas produced in the production of the negative electrode coating material contains the uncooled asphalt exhaust gas (gas and asphalt oil, about 0.05% light oil in the asphalt exhaust gas), and the direct treatment in the RTO will cause the RTO to operate abnormally. , shutdown, over-temperature, easy to cause flash explosion and fire, the process of the present invention is used to treat the asphalt waste gas before it enters the RTO treatment device, which eliminates the major over-temperature hidden danger of the asphalt exhaust gas in the RTO treatment process, and recovers the asphalt exhaust gas. Light oil, light oil can be sold as a by-product, about 0.05% light oil is contained in the bitumen exhaust gas, and more than 95% light oil is recovered for the company every year.

Description of drawings

FIG. 1 is a schematic diagram of the asphalt tail gas degreasing device in the production of the negative electrode coating material of the present invention.

Among them: 1- water spray tower; 101- exhaust gas inlet; 102- packing; 103- flue gas outlet; 2- dehydration tank I; 201- water supply pipeline; 202- water supply automatic pneumatic valve; 203- water level controller; Dehydration tank Ⅰ automatic oil outlet pneumatic valve; 205-dehydration tank Ⅰ automatic control of oil specific gravity controller; 3- dehydration tank Ⅱ; 301- dehydration tank Ⅱ automatic oil outlet pneumatic valve; 303-dehydration tank II automatic water outlet pneumatic valve; 304-dehydration tank II automatic water outlet specific gravity controller; 4-water pump; 5-pipeline I; 6-pipeline II; 7-pipeline III.

Detailed ways

In order to further understand the present invention, the present invention will be described below in conjunction with examples, but the examples are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

The present invention provides a deoiling device for asphalt tail gas in the production of negative electrode coating materials. As shown in FIG. 1 , the deoiling device includes a water spray tower 1, a dehydration tank I2 and a dehydration tank II3. The asphalt tail gas to be deoiled is sprayed by water. After being treated by the shower tower, the separated water-oil mixture material enters the dehydration tank I2 for oil-water separation, the separated oil enters the dehydration tank II3 for further oil-water separation, and the dehydrated material is output, thereby completing the light oil recovery; the specific structure of each part And the connection relationship is as follows:

The inside of the water spray tower is provided with a filler 102, and a water spray head is arranged above the filler. The water spray head is connected to the pipeline I5, and the pipeline I5 is connected to the dehydration tank I2 and the dehydration tank II3 through two branches respectively. At the bottom of the pipe, there is a water pump 4 on the pipeline I. The top of the water spray tower is provided with a flue gas outlet 103, and the bottom of the tower is connected to the middle of the dehydration tank I2 through pipeline II6; the middle and lower part of the water spray tower is provided with an asphalt tail gas inlet 101, and the asphalt tail gas inlet is arranged below the filler, It is used for the input of the tail gas of the bitumen to be deoiled. The pretreated asphalt tail gas enters the water spray tower through the asphalt tail gas inlet, and the asphalt flue gas from which the light oil and water have been removed from the treated asphalt tail gas goes up in the water spray tower, and exits from the flue gas outlet 103. The light oil and water go to the lower part and enter the dehydration tank I through pipeline II6 for rough treatment.

The bottom of the dehydration tank I is designed as a conical structure, the top of the dehydration tank I is connected to a water replenishing pipeline 201, and an automatic pneumatic valve 202 for replenishing water is arranged on the replenishing water pipeline. (Float ball liquid level controller UQK-02 interface flange DN50) is connected to the water replenishment automatic pneumatic valve (model DN50 pneumatic ball valve) on the replenishment pipeline; dehydration tank I controls the upper water level through the water level controller, and the water level is lower than the water level controller. When the water level is set, the water replenishment automatic pneumatic valve is opened to replenish water. When the set water level is reached, the water replenishment automatic pneumatic valve is automatically closed and the water pump is turned on; the upper opening of the dehydration tank I is provided with a dehydration tank I to automatically control the output oil specific gravity controller. 205. Pipeline Ⅲ7 is equipped with dehydration tank I automatic oil outlet pneumatic valve 204, dehydration tank I automatic oil outlet pneumatic valve (DN50 pneumatic switch ball valve) and dehydration tank I automatic oil outlet specific gravity controller (model: online specific gravity controller , GC-8000v2 (upgraded version), measuring range 0.600-1.000) is connected; the upper part of the dehydration tank I is open and connected to the upper part of the dehydration tank II through the pipeline III7.

The bottom of the dehydration tank II is designed as a cone-shaped structure, and the upper part is opened and connected to the pipeline IV, which is used to output the final light oil product; the upper opening of the dehydration tank II is provided with a dehydration tank II to automatically control the oil specific gravity controller. 302. The pipeline IV connected to the dehydration tank II is equipped with a pneumatic valve for automatic oil discharge of the dehydration tank II. : GC-8000v2 (upgrade version), measuring range 0.6000-1.000) is connected. The lower part of the dehydration tank II is provided with a dehydration tank II automatic water outlet specific gravity controller 304, and the branch connected to the pipeline I at the bottom of the dehydration tank II is provided with a dehydration tank II automatic water outlet control valve 303, and the dehydration tank II automatically controls the outlet water specific gravity control. The device (model: GC8000v2 (upgraded version), measuring range 1.000-1.450) is connected to the automatic water outlet control valve of dehydration tank II (model: DN50 pneumatic switch ball valve).

Example 1:

In this example, the degreasing device of the present invention is used to treat the asphalt waste tail gas generated in the production of the negative electrode coating material. The asphalt tail gas includes gas and asphalt oil, and contains 0.05wt.% light oil.

The asphalt tail gas deoiling process includes the following steps:

(1) Set the water level in the dehydration tank I, which is lower than the water level in the dehydration tank I set by the controller. The water replenishment automatic pneumatic valve, the water pump is turned on; the water level of the water supply is set to 1.0 meters;

(2) The asphalt tail gas to be treated enters the water spray tower. After the asphalt tail gas is separated in the packing layer, the asphalt flue gas goes up in the water spray tower and is led out from the upper part of the spray tower, while the light oil and water go to the water spray tower. The lower part of the tower goes into the dehydration tank I for rough treatment to separate the oil and water; the water in the dehydration tank I goes to the lower part of the cone and enters the water spray tower by the water pump, and the oil in the upper layer of the dehydration tank I is subjected to the dehydration tank I. Automatically control the control of the specific gravity controller of the oil. If the specific gravity is not satisfied, the pneumatic valve of the dehydration tank I will be closed, and if the specific gravity is satisfied, the pneumatic valve of the dehydration tank I will be opened, and the oil in the dehydration tank I will enter the dehydration tank II for re-cone. Body settling; the specific gravity of the oil in the upper part of the dehydration tank I is controlled to be 0.900;

(3) The material (oil) input from the dehydration tank I to the dehydration tank II is separated from oil and water again, and the separated water is automatically controlled by the dehydration tank II at the lower part of the dehydration tank II. The valve is opened when the specific gravity is satisfied, and the valve is closed when the specific gravity is not satisfied; the specific gravity of the water at the bottom of the dehydration tank II is controlled to be 1.000. The specific gravity of the oil in the upper part of the dehydration tank II is controlled to be 0.850, and the separated oil is automatically controlled by the upper part of the dehydration tank II. Recycle.

After calculation, in this example, 10 tons of asphalt tail gas is input, and the recovered light oil is 4.5 kg, and the recovery rate is very high.

Claims (9)

1. The utility model provides an asphalt tail gas deoiling device in negative pole cladding material production which characterized in that: the tail gas oil removing device comprises a water spray tower, a dehydration tank I and a dehydration tank II, after the deoiled asphalt tail gas is treated by the water spray tower, the separated water-oil mixture enters the dehydration tank I for oil-water separation, the separated oil enters the dehydration tank II for further oil-water separation, and the dehydrated material is output, so that the light oil recovery is completed; wherein:

water spray tower: the inside of the tower is provided with a filler, a water spray nozzle is arranged above the filler, a flue gas outlet is arranged at the top of the tower, and the bottom of the tower is connected to the middle part of a dewatering tank I through a pipeline II;

dewatering tank I: the top of the dewatering tank I is connected with a water supplementing pipeline, an automatic water supplementing pneumatic valve is arranged on the water supplementing pipeline, and a water level controller is arranged on the side wall of the middle of the dewatering tank I; the water level controller is connected with an automatic water replenishing pneumatic valve on a water replenishing pipeline; the dewatering tank I controls the water feeding level through a water level controller, when the water level is lower than the set water level of the water level controller, the automatic water supplementing pneumatic valve starts supplementing water, and when the set water level is reached, the automatic water supplementing pneumatic valve automatically closes, and the water pump starts; the upper part of the dewatering tank I is opened and is connected to the upper part of the dewatering tank II through a pipeline III;

and (5) a dewatering tank II: and the upper opening of the dewatering tank II is connected with a pipeline IV for outputting the final light oil product.

2. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 1, characterized in that: the middle lower part of the water spray tower is provided with an asphalt tail gas inlet for inputting asphalt tail gas to be deoiled; shower head connecting line I in the water spray tower, I rethread two branches of pipeline are connected to the bottom of dewatering tank I and dewatering tank II respectively, are equipped with the water pump on the pipeline I.

3. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 2, characterized in that: the pretreated asphalt tail gas enters a water spray tower through an asphalt tail gas inlet, asphalt flue gas with light oil and water removed from the treated asphalt tail gas moves upwards in the water spray tower and is led out from a flue gas outlet, and the light oil and the water move downwards and enter a dewatering tank I through a pipeline II for rough treatment.

4. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 1, characterized in that: the upper portion opening part of dehydration jar I sets up I automatic control of dehydration jar proportion controller that produces oil, is equipped with I automatic pneumatic valve that produces oil of dehydration jar on the pipeline III, and I automatic pneumatic valve that produces oil of dehydration jar is connected with I automatic control of dehydration jar proportion controller that produces oil.

5. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 1, characterized in that: the upper portion opening part of dehydration jar II sets up II automatic control of dehydration jar proportion controllers that produce oil, is equipped with II automatic pneumatic valves that produce oil of dehydration jar on the pipeline IV that II connections of dehydration jar, and II automatic pneumatic valves that produce oil of dehydration jar are connected with II automatic control of dehydration jar proportion controllers that produce oil.

6. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 5, characterized in that: the lower part of the dewatering tank II is provided with a dewatering tank II automatic control water outlet proportion controller, a branch road connected with the pipeline I at the bottom of the dewatering tank II is provided with a dewatering tank II automatic water outlet control valve, and the dewatering tank II automatic control water outlet proportion controller is connected with the dewatering tank II automatic water outlet control valve.

7. The asphalt tail gas oil removing device in the production of the negative electrode coating material according to claim 1, characterized in that: the bottoms of the dewatering tank I and the dewatering tank II are designed to be conical structures.

8. A process for removing oil from asphalt tail gas in the production of a negative electrode coating material by using the device of any one of claims 1 to 7, which is characterized by comprising the following steps: the process comprises the following steps:

(1) setting the water feeding level in the dehydration tank I, starting the automatic water supplementing pneumatic valve to feed water, closing the automatic water supplementing pneumatic valve when the water level in the dehydration tank I reaches the set water level, and starting the water pump;

(2) the asphalt tail gas to be treated enters a water spray tower, the asphalt tail gas is separated in a filler layer, the asphalt flue gas moves upwards in the water spray tower and is led out from the upper part of the spray tower, and the light oil and the water move towards the lower part of the tower and enter a dehydration tank I for coarse treatment so as to separate the oil from the water; water is in the middle-lower layer of the dehydration tank I and enters the water spray tower through the water pump, oil on the upper layer in the dehydration tank I is controlled by the automatic control oil outlet specific gravity controller of the dehydration tank I, the specific gravity does not meet the requirement, the automatic oil outlet pneumatic valve of the dehydration tank I is closed, the specific gravity meets the requirement, the automatic oil outlet pneumatic valve of the dehydration tank I is opened, and the oil in the dehydration tank I enters the dehydration tank II;

(3) the material (oil) input into the dehydration tank II from the dehydration tank I is subjected to oil-water separation again, the separated water is automatically controlled by the dehydration tank II at the lower part of the dehydration tank II to control the automatic water outlet pneumatic valve of the dehydration tank II through the water outlet specific gravity controller, the specific gravity meets the requirement that the valve is opened, and the valve is closed if the specific gravity does not meet the requirement; the separated oil is automatically controlled by the dewatering tank II on the upper part of the dewatering tank II to open the automatic oil outlet pneumatic valve of the dewatering tank II through the oil outlet specific gravity controller, so that the recovery of light oil is completed.

9. The asphalt tail gas oil removal process in the production of the negative electrode coating material according to claim 8, characterized in that: in the step (1), the upper water level is set to be 0.5-1.5 m; in the step (2), the specific gravity of the oil discharged from the upper part in the dehydration tank I is controlled to be 0.90-0.95; in the step (3), the specific gravity of the upper oil in the dewatering tank II is controlled to be 0.85-0.90, and the specific gravity of the bottom water in the dewatering tank II is controlled to be 1.000.

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