CN111117718A

CN111117718A - Dustless production method of narrow-distillation-range low-viscosity insulating oil

Info

Publication number: CN111117718A
Application number: CN201911218305.9A
Authority: CN
Inventors: 许春栋; 蒋华良; 许群益
Original assignee: Jiangsu Gaoke Petrochemical Co ltd
Current assignee: Jiangsu Gaoke Petrochemical Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-05-08

Abstract

The invention discloses a dustless production method of narrow-distillation-range low-viscosity insulating oil, belonging to the technical field of oil product production, and the dustless production method of the narrow-distillation-range low-viscosity insulating oil comprises the following steps: the narrow-distillation-range low-viscosity insulating oil produced by the method has the advantages of narrow fraction, low viscosity, high heat dissipation, good cooling performance, good electrical insulating performance, low medium loss, high oxidation resistance safety, long service life, low condensation point, good low-temperature fluidity, high flash point and low evaporability.

Description

Dustless production method of narrow-distillation-range low-viscosity insulating oil

Technical Field

The invention relates to the technical field of oil product production, in particular to a dustless production method of insulating oil with narrow distillation range and low viscosity.

Background

With the rapid development of national economy, the power industry leading to national economy is greatly developed, and with the continuous expansion of power grids, transformer oil matched with the power grids is increasing day by day. The transformer oil is one of important raw materials of a power transmission and transformation system, is mainly used in oil-filled electrical equipment such as transformers and reactors, and has the functions of insulating, radiating, cooling and the like.

Large-scale domestic oil refineries like the oil refinery of cramarie, lanzhou oil refinery, etc. have long been engaged in the development and production of transformer oil, which cuts a specific fraction from petroleum fractions and produces transformer oil through a series of processing techniques, meeting the requirements of the GB2536 standard, but having a relatively high viscosity (generally 9-10). In the live operation process of the transformer, the coil and the iron core generate heat which needs to be absorbed and dissipated by transformer oil, so that the viscosity of the transformer oil is smaller and better under the condition of meeting safety indexes, the heat dissipation is easier, the operation temperature of the transformer can be reduced, and the service cycle of the transformer is prolonged; meanwhile, the addition amount of insulating oil in the transformer can be reduced, the comprehensive cost of the transformer is reduced, and the petroleum resource is saved. This is a necessary direction for market development.

A certain amount of clay needs to be put into a clay refining kettle in the preparation process of the existing low-viscosity insulating oil, in order to increase the contact area between the clay and oil, the smaller the particle size of the clay is, the better the particle size of the clay is, in the process of adding the clay into the oil, a large amount of clay powder positioned on the liquid surface is difficult to smoothly mix with the oil, the mixing efficiency is low, and the clay powder is easy to float into the air in the process of adding the clay and mixing the clay, so that the production environment is severe, and the respiratory health of workers is influenced.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a dustless production method of narrow-distillation-range low-viscosity insulating oil, the produced narrow-distillation-range low-viscosity insulating oil has the advantages of narrow fraction, low viscosity, quick heat dissipation, good cooling performance, good electrical insulating performance, small medium loss, good antioxidant safety, long service life, low condensation point, good low-temperature fluidity, high flash point and small evaporability, and in the clay refining step, a dustless clay refining kettle is used for adding and mixing clay powder in the oil, so that the mixing efficiency is high, floating dust is not easy to generate, and the production environment is improved.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A dustless production method of insulating oil with narrow distillation range and low viscosity comprises the following steps:

s1, rectifying and cutting, namely pumping the low-viscosity mineral oil into a rectifying tower for rectifying and cutting, wherein the cut fraction is base oil with the temperature of 300-350 ℃;

s2, urea dewaxing, namely, inputting the base oil obtained in the S1 into a urea dewaxing device, and carrying out deep dewaxing at the temperature of 25-35 ℃ by adopting a wet urea dewaxing process to produce dewaxed oil;

s3, clay refining, namely pumping the dewaxed oil obtained in the step S2 into a dustless clay refining kettle, heating to 70-90 ℃, adding prepared clay with the weight ratio of 2-4%, keeping the temperature and stirring for 20-40min, and filtering by a filter press to obtain insulating oil base oil;

s4, carrying out blending reaction, pumping 5000 kg of the special base oil into a blending reaction kettle at the rotating speed of 80-100 rpm, heating to 50-70 ℃ while stirring, adding 0.3-0.5% of antioxidant, and carrying out heat preservation and stirring for 25-35 min;

and S5, vacuum filtering, and vacuum filtering by a vacuum filtering device to obtain the narrow distillation range low-viscosity insulating oil.

The narrow-distillation-range low-viscosity insulating oil produced by the method has the advantages of narrow fraction, low viscosity, quick heat dissipation, good cooling performance, good electrical insulating performance, small medium loss, good oxidation resistance safety, long service life, low condensation point, good low-temperature fluidity, high flash point and small evaporability, and in the clay refining step, a dustless clay refining kettle is used for adding and mixing clay powder in the oil, so that the mixing efficiency is high, floating dust is not easy to generate, and the production environment is improved.

Furthermore, the pour point of the dewaxed oil reaches below minus 25 ℃, and the lower the pour point is, the better the low-temperature fluidity of the oil product is.

Further, dustless carclazyte refining kettle includes dustless carclazyte refining kettle body, stirring lid and dustless cross and adds the frame, stirring lid and dustless carclazyte refining kettle body upper port phase-match, and stirring lid lower extreme fixedly connected with drive arrangement, drive arrangement can select according to actual need, be Y80M 1-2's motor like the model, be connected with dustless cross between drive arrangement's power take off end and the dustless carclazyte refining kettle body inner bottom and add the frame, in the carclazyte refining step, the dustless cross that contains the carclazyte powder adds the frame and soaks in the fluid, starts drive arrangement, and the carclazyte powder in the dustless cross adds the frame evenly mixes in the fluid, and dustless cross adds the frame self and can play good stirring effect.

Further, dustless cross adds the frame and includes splendid attire pipe and a pair of dust blocking head, both ends are connected with card pipe and lower commentaries on classics cover respectively about the splendid attire pipe, the interior bottom fixedly connected with of dustless carclazyte refining kettle body bears the axle, it is connected with the bearing to change down between cover and the bearing axle, and the friction that the cover rotated the in-process and produced under the reduction, the splendid attire pipe can carry out artifical the dismantlement through card pipe and drive arrangement's power take off end joint, and it is reinforced and the maintenance is changed to be convenient for, and is a pair of dust blocking head is connected respectively and is controlled both ends in the splendid attire pipe, and the white soil powder splendid attire is adorned in the splendid attire.

Furthermore, the dust blocking head comprises a fixed pipe sleeve and a dust sealing ball, the fixed pipe sleeve is connected with the end of the containing pipe, the dust sealing ball is located on one side, away from the containing pipe, of the fixed pipe sleeve, a cross rod is fixedly connected in the fixed pipe sleeve, a telescopic piece is fixedly connected between the cross rod and the dust sealing ball, when the driving device drives the dust-free cross adding frame to rotate, the dust sealing ball stretches the telescopic piece due to centrifugal force, and the argil is moved to the two ends of the containing pipe by the centrifugal force and leaks out from a gap formed between the dust sealing ball and the containing pipe to be mixed with oil.

Furthermore, the fixed pipe sleeve is in threaded connection with the containing pipe, so that the dust blocking head is convenient to detach, the clay is added, and the sum of the lengths of the fixed pipe sleeve and the containing pipe is 2/3-3/4 of the inner diameter of the dustless clay refining kettle body, so that the dust sealing ball is prevented from contacting the inner wall of the dustless clay refining kettle body under the condition that the dust sealing ball is far away from the containing pipe due to centrifugal force.

Furthermore, the extensible member includes flexible pipe and extension spring, and extension spring outside is located to flexible pipe cover, and when the dust sealing ball stretched the extensible member because of receiving centrifugal force, flexible pipe and extension spring were together stretched, and the setting of flexible pipe can prevent that extension spring from excessively stressing the damage.

Further, the containing pipe is colorless transparent body, and the outer surface of the containing pipe is carved with scale marks, and the operator can look over the amount of white soil through the colorless transparent body, so that the containing pipe is convenient to accurately and quantitatively contain.

Furthermore, the dust sealing ball is a solid steel ball which is large in mass and large in centrifugal force, and the dust sealing ball is guaranteed to be stably far away from the end part of the containing pipe under the action of the centrifugal force, so that the clay in the containing pipe is guaranteed to be smoothly mixed with the oil.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the narrow-distillation-range low-viscosity insulating oil produced by the scheme has the advantages of narrow fraction, low viscosity, high heat dissipation, good cooling performance, good electrical insulating performance, small medium loss, good oxidation resistance safety, long service life, low condensation point, good low-temperature fluidity, high flash point and low evaporability, and in the clay refining step, the clay powder is added and mixed in the oil by using a dustless clay refining kettle, so that the mixing efficiency is high, floating dust is not easy to generate, and the production environment is improved.

(2) In the carclazyte refining step, the dustless cross that contains the carclazyte powder adds the frame and soaks in fluid, starts drive arrangement, and the dustless cross adds the carclazyte powder in the frame and evenly mixes in fluid, and dustless cross adds the frame self and can play good stirring effect.

(3) The fixed pipe sleeve is in threaded connection with the containing pipe, so that the dust blocking head is convenient to detach, the argil is added, and the sum of the lengths of the fixed pipe sleeve and the containing pipe is 2/3-3/4 of the inner diameter of the dustless argil refining kettle body, so that the dust sealing ball is prevented from contacting the inner wall of the dustless argil refining kettle body under the condition that the dust sealing ball is far away from the containing pipe due to centrifugal force.

(4) The telescopic piece comprises a telescopic pipe and an extension spring, the telescopic pipe is sleeved outside the extension spring, when the dust sealing ball stretches the telescopic piece due to centrifugal force, the telescopic pipe and the extension spring are stretched together, and the telescopic pipe can prevent the extension spring from being damaged due to excessive stress.

(5) The containing pipe is colorless transparent body, and the outer surface of the containing pipe is carved with scale marks, and operating personnel can see the amount of white soil through the colorless transparent body, and the accurate ration splendid attire of being convenient for.

(6) The dust sealing ball is a solid steel ball which is large in mass and large in centrifugal force, and the dust sealing ball is guaranteed to be stably far away from the end part of the containing pipe under the action of the centrifugal force, so that the clay in the containing pipe is guaranteed to be smoothly mixed with the oil.

Drawings

FIG. 1 is a flow chart of the method steps of the present invention.

FIG. 2 is a perspective view of the clay purifying pot of the present invention.

FIG. 3 is a perspective view of the mixing lid of the present invention attached to a dust free cross addition frame.

Fig. 4 is a perspective view of the container of the present invention in a partially cut-away state.

Fig. 5 is a perspective view of the present invention at the telescoping member.

FIG. 6 is a perspective view of the dust-sealing ball of the present invention under centrifugal force.

Fig. 7 is a perspective view of the container tube of the present invention in an upright state.

FIG. 8 is a table of performance indicators for the products prepared in example 1 of the present invention.

FIG. 9 is a table of performance indicators for the products prepared in example 2 of the present invention.

FIG. 10 is a table of performance indicators for the products prepared in example 3 of the present invention.

The reference numbers in the figures illustrate:

the device comprises a clean clay refining kettle body 1, a stirring cover 2, a driving device 3, a clean cross adding frame 4, a containing pipe 41, an upper clamping pipe 42, a dust sealing ball 43, a fixed pipe sleeve 44, a telescopic member 45, a telescopic pipe 451, an extension spring 452, a cross rod 46, a lower rotating sleeve 47 and a bearing shaft 48.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a method for producing insulating oil with narrow distillation range and low viscosity without dust comprises the following steps:

s1, rectifying and cutting, namely pumping the hydrogenated low-viscosity mineral oil into a rectifying tower for rectifying and cutting, wherein the cut fraction is base oil with the temperature of 300-350 ℃;

s2, urea dewaxing, namely, inputting the base oil obtained in the S1 into a urea dewaxing device, and carrying out deep dewaxing at the temperature of 25-35 ℃ by adopting a dry urea dewaxing process to produce dewaxed oil with the pour point of the dewaxed oil reaching-25 ℃;

s3, clay refining, namely pumping the dewaxed oil obtained in the step S2 into a dustless clay refining kettle, heating to 80 ℃, adding prepared clay with the weight ratio of 3%, keeping the temperature and stirring for 30min, and filtering by a filter press to obtain insulating oil base oil;

s4, carrying out blending reaction, pumping 5000 kg of the special base oil into a blending reaction kettle at the rotating speed of 80-100 r/min, heating to 60 ℃ while stirring, adding 15kg of antioxidant T501 (produced by Nanjing Mida chemical industry Co.), and carrying out heat preservation and stirring for 30 min;

Example 2:

s1, rectifying and cutting, namely pumping the hydrofined 5# low-viscosity mineral oil into a rectifying tower for rectifying and cutting, and cutting the base oil with the fraction of 300-;

s2, urea dewaxing, namely, inputting the base oil obtained in the S1 into a urea dewaxing device, and carrying out deep dewaxing at the temperature of 30-40 ℃ by adopting a dry urea dewaxing process to produce dewaxed oil with the pour point of-25 ℃;

s3, clay refining, namely pumping the dewaxed oil obtained in the step S2 into a dustless clay refining kettle, heating to 70 ℃, adding prepared clay with the weight ratio of 2%, keeping the temperature and stirring for 20min, and filtering by a filter press to obtain insulating oil base oil;

s4, carrying out blending reaction, pumping 5000 kg of the special base oil into a blending reaction kettle at the rotating speed of 80-100 r/min, heating to 60 ℃ while stirring, adding 20kg of antioxidant T501 (produced by Nanjing Mida chemical industry Co.), and carrying out heat preservation and stirring for 25 min;

Example 3:

s1, rectifying and cutting, namely pumping the refined special white oil material into a rectifying tower for rectifying and cutting, wherein the cut fraction is 305-;

s2, urea dewaxing, namely, inputting the base oil obtained in the S1 into a urea dewaxing device, and carrying out deep dewaxing at the temperature of 25-35 ℃ by adopting a dry urea dewaxing process to produce dewaxed oil with the pour point of the dewaxed oil reaching-26 ℃;

s3, clay refining, namely pumping the dewaxed oil obtained in the step S2 into a dustless clay refining kettle, heating to 90 ℃, adding prepared clay with the weight ratio of 4%, keeping the temperature and stirring for 40min, and filtering by a filter press to obtain insulating oil base oil;

s4, carrying out blending reaction, pumping 5000 kg of the special base oil into a blending reaction kettle at the rotating speed of 80-100 rpm, heating to 50-70 ℃ while stirring, adding 0.3-0.5% of antioxidant, and carrying out heat preservation and stirring for 30 min;

The dustless clay refining kettle in the above three embodiments is the same, and referring to fig. 2, the dustless clay refining kettle comprises a dustless clay refining kettle body 1, a stirring cover 2 and a dustless cross-shaped adding frame 4, the stirring cover 2 is matched with the upper port of the dustless clay refining kettle body 1, referring to fig. 3, the lower end of the stirring cover 2 is fixedly connected with a driving device 3, the driving device 3 can be selected according to actual needs, for example, a motor with the model number of Y80M1-2, a dust-free cross adding frame 4 is connected between the power output end of the driving device 3 and the bottom end of the dustless clay refining kettle body 1, in the carclazyte refining step, the dustless cross that contains the carclazyte powder adds frame 4 and soaks in fluid, starts drive arrangement 3, and the dustless cross adds the carclazyte powder in frame 4 and evenly mixes in fluid, and dustless cross adds frame 4 self and can play good stirring effect.

Referring to fig. 3, the dust-free cross-shaped adding frame 4 comprises a containing pipe 41 and a pair of dust blocking heads, the upper end and the lower end of the containing pipe 41 are respectively connected with an upper clamping pipe 42 and a lower sleeve 47, the inner bottom end of the dustless clay refining kettle body 1 is fixedly connected with a bearing shaft 48, a bearing is connected between the lower sleeve 47 and the bearing shaft 48, friction generated in the rotating process of the lower sleeve 47 is reduced, the containing pipe 41 is clamped with the power output end of the driving device 3 through the upper clamping pipe 42 and can be manually disassembled, feeding and maintenance and replacement are convenient, the pair of dust blocking heads are respectively connected to the left end and the right end of the containing pipe 41, clay powder is contained in the containing pipe 41, and the dust blocking heads can effectively ensure that the clay cannot easily leak; referring to fig. 4, the dust blocking head includes a fixed pipe sleeve 44 and a dust sealing ball 43, the fixed pipe sleeve 44 is connected to an end of the containing pipe 41, the dust sealing ball 43 is located on a side of the fixed pipe sleeve 44 away from the containing pipe 41, a cross rod 46 is fixedly connected to an inner end of the fixed pipe sleeve 44, a telescopic member 45 is fixedly connected between the cross rod 46 and the dust sealing ball 43, and when the driving device 3 drives the dust-free cross adding frame 4 to rotate, referring to fig. 6, the dust sealing ball 43 stretches the telescopic member 45 due to centrifugal force, and clay moves towards two ends of the containing pipe 41 due to centrifugal force and leaks out from a gap formed between the dust sealing ball 43 and the containing pipe 41 to be mixed with oil, so that clay powder is added and mixed in the oil, mixing efficiency is high, and floating dust is not.

The fixed pipe sleeve 44 is in threaded connection with the containing pipe 41, so that the dust blocking head is convenient to detach, argil is added, the sum of the lengths of the fixed pipe sleeve 44 and the containing pipe 41 is 2/3-3/4 of the inner diameter of the dustless argil refining kettle body 1, and the dust sealing ball 43 is ensured not to contact the inner wall of the dustless argil refining kettle body 1 under the condition that the dust sealing ball 43 is far away from the containing pipe 41 due to centrifugal force.

Referring to fig. 5, the extension member 45 includes an extension tube 451 and an extension spring 452, the extension tube 451 is sleeved outside the extension spring 452, when the dust seal ball 43 is stretched by centrifugal force to extend the extension member 45, the extension tube 451 and the extension spring 452 are stretched together, and the extension tube 451 is disposed to prevent the extension spring 452 from being damaged by excessive force.

Containing tube 41 is colorless transparent body, and the scale mark has been carved with to the surface of containing tube 41, and operating personnel can see the white soil volume through colorless transparent body, the accurate ration splendid attire of being convenient for, please refer to fig. 7, erects containing tube 41 and places, opens a dust blocking head of upper end, can throw carclazyte in containing tube 41.

The dust sealing balls 43 are solid steel balls which are large in mass and large in centrifugal force, and the solid steel balls are guaranteed to be stably far away from the end part of the containing pipe 41 under the action of the centrifugal force, so that the carclazyte inside the containing pipe 41 is guaranteed to be smoothly mixed with the oil liquid.

It needs to be further explained that the dust-free cross-shaped adding frame 4 is always kept to rotate at a high speed for stirring in the process of adding the argil by using the dust-free cross-shaped adding frame 4 until the mixed oil is transferred, so as to prevent the mixed oil from precipitating; in addition, after the dust-free cross adding frame 4 stops rotating halfway, the telescopic piece 45 contracts, the dust sealing ball 43 plugs the port of the fixed pipe sleeve 44, and the mixed oil part is stored in the containing pipe 41, so that sampling is facilitated.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A dustless production method of insulating oil with narrow distillation range and low viscosity is characterized in that: the method comprises the following steps:

s2, urea dewaxing, namely, inputting the base oil obtained in the S1 into a urea dewaxing device for deep dewaxing at the temperature of 25-35 ℃ to produce dewaxed oil;

2. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 1, wherein: the urea dewaxing adopts a dry urea dewaxing process.

3. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 1, wherein: the pour point of the dewaxed oil reaches below-25 ℃.

4. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 1, wherein: dustless carclazyte is refined cauldron includes dustless carclazyte refined cauldron body (1), stirring lid (2) and dustless cross and adds frame (4), stirring lid (2) and dustless carclazyte refined cauldron body (1) up end phase-match, and stirring lid (2) lower extreme fixedly connected with drive arrangement (3), be connected with dustless cross between the power take off end of drive arrangement (3) and the dustless carclazyte refined cauldron body (1) in the bottom and add frame (4).

5. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 4, wherein: dustless cross adds frame (4) including splendid attire pipe (41) and a pair of dust blocking head, both ends are connected with card pipe (42) and commentaries on classics cover (47) down respectively about splendid attire pipe (41), dustless argil refined cauldron body (1) inner bottom fixedly connected with bears axle (48), it is connected with the bearing to change cover (47) down and bear between axle (48), power take off end joint, a pair of dust blocking head is connected respectively in both ends about splendid attire pipe (41) through last card pipe (42) and drive arrangement (3).

6. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 5, wherein: the dust blocking head comprises a fixed pipe sleeve (44) and a dust sealing ball (43), the fixed pipe sleeve (44) is connected with the end of the containing pipe (41), the dust sealing ball (43) is located on one side, far away from the containing pipe (41), of the fixed pipe sleeve (44), a cross rod (46) is fixedly connected to the inner end of the fixed pipe sleeve (44), and a telescopic piece (45) is fixedly connected between the cross rod (46) and the dust sealing ball (43).

7. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 6, wherein: the fixed pipe sleeve (44) is in threaded connection with the containing pipe (41), and the sum of the lengths of the fixed pipe sleeve (44) and the containing pipe (41) is 2/3-3/4 of the inner diameter of the body (1) of the clay refining kettle.

8. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 6, wherein: the telescopic piece (45) comprises a telescopic pipe (451) and an extension spring (452), and the telescopic pipe (451) is sleeved outside the extension spring (452).

9. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 6, wherein: the containing pipe (41) is a colorless transparent pipe body, and scale marks are carved on the outer surface of the containing pipe (41).

10. The method for dustless production of insulating oil with narrow distillation range and low viscosity as claimed in claim 4, wherein: the dust sealing ball (43) is a solid steel ball.