CN115386393B - Preparation system and method of anti-gassing component of transformer oil - Google Patents
Preparation system and method of anti-gassing component of transformer oil Download PDFInfo
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- CN115386393B CN115386393B CN202210796779.7A CN202210796779A CN115386393B CN 115386393 B CN115386393 B CN 115386393B CN 202210796779 A CN202210796779 A CN 202210796779A CN 115386393 B CN115386393 B CN 115386393B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
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Abstract
The invention discloses a preparation system and a preparation method of an anti-gassing component of transformer oil, comprising an aromatic hydrocarbon extraction xylene tower, a preheating furnace, a molecular distillation tower, a fractionating tower, a product storage tank and a separation device, wherein a raw material outlet is arranged on the aromatic hydrocarbon extraction xylene tower; the product storage tank comprises a product liquid inlet, the product liquid outlet is connected with the product liquid inlet, a distillation liquid inlet is arranged on the separation device, and the distillation liquid outlet is connected with the distillation liquid inlet. The preparation method disclosed by the invention is matched with the anti-gassing component prepared by the preparation system, so that the aromatic hydrocarbon content is high, the alkali nitrogen content is low, the gassing property of the transformer oil is greatly improved, and the amount of the transformer oil added is small.
Description
Technical Field
The invention relates to the technical field of petrochemical industry, in particular to a preparation system and a preparation method of an anti-gassing component of transformer oil.
Background
The transformer oil is an important insulating medium in power electrical equipment, plays roles of heat dissipation, insulation, arc extinction and the like of the transformer, and has great significance on the safe operation of the transformer in performance. The key performance index of the transformer oil is gassingResistance to corrosion, oxidation stability, breakdown voltage, viscosity, and the like. Research shows that the straight-chain alkane in the transformer oil has poor anti-gassing property and high low-temperature viscosity; aromatic hydrocarbon has good anti-gassing performance, but polycyclic aromatic hydrocarbon has poor oxidation stability; the potentially corrosive sulfur is converted to active sulfur in the event of local overheating of the transformer, forming Cu 2 S and other corrosion products directly influence the corrosion resistance of the transformer oil, and the requirement of the ultrahigh-pressure transformer oil on the anti-gassing performance is higher, so that the naphthenic base hydrogenated base oil meets the standard requirement.
In the prior art, naphthenic base crude oil and high-quality lubricating oil are the accepted first raw materials for producing transformer oil, but as the raw materials are increasingly reduced and the price is continuously increased, the source of the raw materials of the transformer oil needs to be enlarged. At present, heavy aromatic hydrocarbon, a byproduct of an aromatic hydrocarbon extraction system, is mainly used as a trimethylbenzene raw material or solvent naphtha, and the process is relatively complex and the economic benefit of the product is low. The high-concentration aromatic hydrocarbon is an ideal component of transformer oil or ultrahigh-voltage transformer oil, and a blended product with higher economic value can be obtained through process extraction.
Chinese patent CN104611006B discloses a device and a method for improving the gassing resistance of transformer oil, which uses furfural as solvent to extract gassing resistant components of transformer oil, and then separates the extract and raffinate to obtain the target product. The method also provides a furfural regeneration circulation unit. However, the method consumes most of energy in the treatment unit of the extraction liquid and the raffinate, and has low comprehensive economic benefit.
Chinese patent CN105087059B discloses a component of transformer oil with anti-gassing property and its preparation method, which also adopts furfural solvent to extract the component of transformer oil with anti-gassing property, and then uses clay or activated carbon to adsorb the extracted oil to obtain the target product. The clay refining adopted by the method can cause certain metal pollution to the final product, reduce the breakdown voltage of the final product, lead to deterioration of the transformer oil, and meanwhile, the clay needs to be treated for the second time, so that the method is not environment-friendly.
Chinese patent CN108329945B discloses a method for preparing a component of transformer oil with anti-gassing property, which uses catalytic cracking slurry as raw material, and obtains the component of transformer oil with anti-gassing property through a series of processes of hydrogenation-distillation-solvent refining-denitrification-clay refining, etc. The method has the problems of high distillation temperature, high energy consumption, environmental pollution and the like.
Disclosure of Invention
The invention aims to provide a preparation system of a component with gas-evolution resistance of transformer oil, which is characterized in that an aromatic hydrocarbon extraction xylene tower is directly connected with a preheating furnace, and nitrogen and sulfur substances are removed without a hydrogenation step, so that the transformer oil with the gas-evolution resistance of transformer oil produced by a common solvent refining method is obtained, and the problems in the prior art are solved.
It is still another object of the present invention to provide a method for preparing an anti-gassing component of transformer oil, which is combined with the preparation system of the present invention, and uses widely available heavy aromatic products of an aromatic extraction system as raw materials to directly prepare the high-performance anti-gassing component of transformer oil or ultrahigh-pressure transformer oil through a process of molecular distillation-simple distillation, wherein the prepared anti-gassing component has high aromatic hydrocarbon content and low basic nitrogen content, can greatly improve the gassing property of transformer oil, and has small addition amount in transformer oil without affecting the properties of transformer oil, so as to solve the problems raised in the above background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the preparation system of the anti-gassing component of the transformer oil comprises an aromatic hydrocarbon extraction xylene tower, a preheating furnace, a molecular distillation tower, a fractionating tower, a product storage tank and a separation device, wherein a raw material outlet is arranged on the aromatic hydrocarbon extraction xylene tower, a raw material inlet and a preheating material outlet are arranged on the preheating furnace, the raw material outlet is connected with the raw material inlet, a preheating material inlet, a steaming liquid outlet and a steaming residual liquid outlet are arranged on the molecular distillation tower, and the preheating material outlet is connected with the preheating material inlet; the fractionating tower is provided with a residual liquid inlet, a byproduct outlet and a product liquid outlet, the residual liquid outlet is connected with the residual liquid inlet, the product storage tank is provided with a product liquid inlet, the product liquid outlet is connected with the product liquid inlet, the separating device is provided with a distilled liquid inlet, and the distilled liquid outlet is connected with the distilled liquid inlet.
Still further, the raw material outlet is arranged at the bottom end of the aromatic hydrocarbon extraction xylene tower, the preheating material outlet is arranged at the bottom end of the preheating furnace, the distilled liquid outlet and the distilled liquid outlet are arranged at the bottom end of the molecular distillation tower, and the product liquid outlet is arranged at the lower part of the fractionating tower.
Still further, the raw material inlet is provided at an upper portion of the preheating furnace, the preheating material inlet is provided at a top end of the molecular distillation column, the byproduct outlet is provided at a top end of the fractionation column, and the product liquid inlet is provided at a top end of the product storage tank.
Further, the molecular distiller in the molecular distillation tower adopts a scraped film molecular distiller with a Viscon type scraper mechanism.
The invention also provides another technical scheme: the preparation method of the transformer oil anti-gassing component adopts the preparation system of the transformer oil anti-gassing component for refining, and comprises the following specific steps:
s1: introducing the raw materials extracted from the aromatic hydrocarbon extraction xylene tower into the preheating furnace for preheating to obtain a preheated material;
s2: introducing the preheated material in the step S1 into the molecular distillation tower for molecular distillation to remove the impurities of the aromatic hydrocarbon extraction solvent, and obtaining a distilled liquid and a distilled liquid;
s3: introducing the residual steam in the step S2 into the fractionating tower for fractionating, obtaining product liquid and transformer oil anti-gassing components with the temperature of more than 200 ℃ after fractional cutting by the fractionating tower, pumping the product liquid and the transformer oil anti-gassing components from the fractionating tower into the product storage tank, and discharging byproducts generated in the fractionating tower from the byproduct outlet;
s4: and (3) introducing the distilled liquid in the step S2 into the separation device to separate the aromatic hydrocarbon extraction solvent.
Further, the thickness of the liquid film in the molecular still in the molecular distillation column is in the range of 0.05-0.5mm.
Further, the distance between the cold and hot surfaces in the molecular distillation tower is 20-30mm.
Further, the heat source of the preheating furnace is high-temperature hydrogen which is a byproduct of reforming reaction, and the temperature of the preheating material at the preheating material outlet is 50-55 ℃.
Further, the distillation temperature of the molecular distiller in the molecular distillation tower is 85-110 ℃, and the temperature of the condensing agent in the molecular distillation tower is 10-20 ℃.
Further, the molecular distillation column operates at a pressure in the range of 0.01 to 1.33Pa.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the preparation system and the preparation method of the anti-gassing component of the transformer oil, the raw materials for preparing the high-performance transformer oil component are aromatic hydrocarbon extraction byproducts, the sources are wide, the aromatic hydrocarbon extraction system is particularly important along with the continuous improvement of the gasoline standard in China, and the heavy aromatic hydrocarbon is a high-quality ultrahigh-pressure transformer oil component, so that the economic value of the heavy aromatic hydrocarbon is several times that of the traditional product.
2. The preparation system and the preparation method of the anti-gassing component of the transformer oil are directly connected with the aromatic hydrocarbon extraction device, and the hydrogenation step is not needed to remove nitrogen and sulfur substances, so that the purpose of improving technical indexes such as oxidation stability and corrosion resistance of the transformer oil is achieved.
3. Compared with the traditional clay refining process requiring adding 1% -8% of clay, the clay is gray-white particle powder with special adsorption capacity, and contains metals such as aluminum, iron, magnesium and the like, and the residues of the metal particles can polarize the transformer oil under the action of an electric field, thus threatening the safe and stable operation of the transformer. The method disclosed by the invention does not relate to a clay refining process, and can further improve the breakdown voltage and oxidation stability of the product.
4. The preparation system and the preparation method of the anti-gassing component of the transformer oil have the advantages of low temperature required by a molecular distillation process and low energy consumption.
5. According to the preparation system and the preparation method of the gassing-resistant component of the transformer oil, the gassing-resistant component of the transformer oil can be greatly improved, the addition amount is less than or equal to 1wt% and the oxidation stability of the product is not affected.
Drawings
FIG. 1 is a block diagram of a manufacturing system of the present invention.
In the figure: 1. an aromatic hydrocarbon extraction xylene tower; 2. a preheating furnace; 3. a molecular distillation column; 4. a fractionating tower; 5. a product storage tank; 6. a separation device; 101. a raw material outlet; 102. a raw material inlet; 103. a preheating material outlet; 104. a preheating inlet; 105. a raffinate outlet; 106. a distilled liquid outlet; 107. a raffinate inlet; 108. a byproduct outlet; 109. a product liquid outlet; 110. a product liquid inlet; 111. a distilled liquid inlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the preparation system of an anti-gassing component of transformer oil provided in the embodiment of the invention includes an aromatic extraction xylene tower 1, a preheating furnace 2, a molecular distillation tower 3, a fractionating tower 4, a product storage tank 5 and a separation device 6, wherein a raw material outlet 101 is arranged on the aromatic extraction xylene tower 1, a raw material inlet 102 and a preheating material outlet 103 are arranged on the preheating furnace 2, the raw material outlet 101 is connected with the raw material inlet 102, a preheating material inlet 104, a steaming liquid outlet 106 and a steaming liquid outlet 105 are arranged on the molecular distillation tower 3, and the preheating material outlet 103 is connected with the preheating material inlet 104; the fractionating tower 4 is provided with a residual liquid inlet 107, a byproduct outlet 108 and a product liquid outlet 109, the residual liquid outlet 105 is connected with the residual liquid inlet 107, the product storage tank 5 is provided with a product liquid inlet 110, the product liquid outlet 109 is connected with the product liquid inlet 110, the separating device 6 is provided with a distilled liquid inlet 111, and the distilled liquid outlet 106 is connected with the distilled liquid inlet 111. The preparation system directly connects the arene extraction xylene tower 1 with the preheating furnace 2, does not need hydrogenation step to remove nitrogen and sulfur substances, achieves the aim of improving technical indexes such as oxidation stability and corrosion resistance of transformer oil, and then removes residual impurities in target products through the molecular distillation tower 3.
As shown in fig. 1, as a further technical scheme of the embodiment of the present invention: a raw material outlet 101 is arranged at the bottom end of an aromatic hydrocarbon extraction xylene tower 1, a preheating material outlet 103 is arranged at the bottom end of a preheating furnace 2, a distilled liquid outlet 106 and a distilled liquid outlet 105 are arranged at the bottom end of a molecular distillation tower 3, and a product liquid outlet 109 is arranged at the lower part of a fractionating tower 4; the raw material inlet 102 is arranged at the upper part of the preheating furnace 2, the preheating material inlet 104 is arranged at the top end of the molecular distillation tower 3, the byproduct outlet 108 is arranged at the top end of the fractionating tower 4, the product liquid inlet 110 is arranged at the top end of the product storage tank 5, so that the product liquid is easier to flow of target products, the next procedure is carried out, the reaction is more complete, the production efficiency is improved, the byproduct outlet 108 is arranged to collect byproducts conveniently, and the distilled liquid is separated from the aromatic hydrocarbon extraction solvent through the separation device 6, so that the recovery efficiency is good.
As a further technical scheme of the embodiment of the invention: the molecular distiller in the molecular distillation tower 3 adopts a diaphragm type molecular distiller with a Viscon type scraping plate mechanism, and the Viscon type scraping plate can rapidly finish and update a film, so that the free steam amount is increased, and the distillation efficiency is improved.
In order to further better explain the invention, the embodiment of the invention also provides a preparation method of the transformer oil anti-gassing component, which adopts the preparation system of the transformer oil anti-gassing component for refining, and comprises the following specific steps:
s1: introducing the raw materials extracted from the aromatic hydrocarbon extraction xylene tower 1 into the preheating furnace 2 for preheating to obtain a preheating material, wherein the heat source of the preheating furnace 2 is high-temperature hydrogen which is a byproduct of a reforming reaction, the preheating material temperature of the preheating material outlet 103 is 50-55 ℃, preferably the preheating material temperature of the preheating material outlet 103 is 55 ℃, the high-temperature hydrogen is recycled, no pollution is caused, the preheating is sufficient and good in effect, the preheating material temperature of the preheating material outlet 103 is not easy to exceed 50-55 ℃, the excessive temperature can cause unstable reaction and affect the oxidation stability of a product, and the optimal temperature of the preheating material outlet 103 is 55 ℃;
s2: introducing the preheated material in the S1 into a molecular distillation tower 3 from a raw material inlet 102 for molecular distillation to remove the impurities of the aromatic hydrocarbon extraction solvent, and obtaining a distilled liquid and a distilled liquid; thus, impurities in the target product can be removed to obtain product liquid with higher purity, so that the product performance is better, and the feeding rate and the distillation area of the molecular distillation tower 3 are determined according to specific treatment capacity;
s3: introducing the residual steam in the step S2 into a fractionating tower 4 from a residual steam inlet 107 for fractionating, obtaining product liquid and transformer oil anti-gassing components with the temperature of more than 200 ℃ after fractional cutting by the fractionating tower 4, pumping the product liquid and the transformer oil anti-gassing components from the fractionating tower 4 into a product storage tank 5, and discharging byproducts generated in the fractionating tower 4 from a byproduct outlet 108;
s4: at the same time as the process of S3, the distilled liquid of S2 is introduced into the separation device 6 from the distilled liquid inlet 111 to separate the aromatic hydrocarbon extraction solvent, and the distilled liquid is recovered.
The transformer oil anti-gassing component obtained by the preparation method has high content of monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon, thereby having good anti-gassing property, and only a small amount of the transformer oil anti-gassing component is required to be added into the transformer oil, and the content of the transformer oil anti-gassing component is not more than 1 percent by weight percent, so that the properties of the transformer oil, such as dielectric loss factor and oxidation stability, are not influenced.
In some specific embodiments, the thickness of the liquid film in the molecular distillation device in the molecular distillation tower 3 ranges from 0.05 to 0.5mm, preferably the thickness of the liquid film is 0.25mm, wherein the thickness of the liquid film refers to the distance between a scraping plate and a distillation surface of the molecular distillation device, and if the thickness of the liquid film is not within the range, the content of monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon in the product liquid is finally influenced, so that the gas-stripping resistance is influenced, therefore, the thickness of the liquid film ranges from 0.05 to 0.5mm, preferably the thickness of the liquid film is 0.25mm, and the product liquid prepared in this way has high content of monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon, so that the gas-stripping resistance is better.
In some specific embodiments, the cold-hot surface spacing in the molecular distillation tower 3 is 20-30mm, preferably the cold-hot surface spacing is 24mm, and the cold-hot surface spacing refers to the space between the distillation surface of the distiller and the condensation surface of the condensation system in the molecular distillation tower 3, if the cold-hot surface spacing is not in the range, the distillation effect is poor, and the generation of monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon of the product liquid is affected, therefore, the cold-hot surface spacing is 20-30mm, and the optimal cold-hot surface spacing is 24mm, so that the distillation is more sufficient and better in effect, and the product liquid has high content of monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon, thereby having better anti-gassing property.
In some specific embodiments, the distillation temperature of the molecular distiller in the molecular distillation tower 3 is 85-110 ℃, preferably the distillation temperature is 95 ℃, the temperature of the condensing agent in the molecular distillation tower 3 is 10-20 ℃, preferably the temperature of the condensing agent is 15 ℃, the condensing system in the molecular distillation tower 3 adopts coil condensing equipment, the condensing agent adopts water, the required temperature of the whole molecular distillation tower 3 is 50-100 ℃ lower than that of the conventional distillation process, and the energy consumption is saved by more than 30%.
In some embodiments, the molecular distillation column 3 is operated at a pressure in the range of 0.01 to 1.33Pa, preferably at a pressure of 0.1Pa, which affects the production of the active ingredient in the product liquid, and in this range, the production of the active ingredient in the product liquid is more stable.
In some specific embodiments, in order to improve the production efficiency and the preparation effect, a feeding control system and a feeding degassing system are further connected between the bottom preheating outlet 103 and the molecular distillation column 3 in sequence, so that the feeding can be controlled, and the feeding control system and the feeding degassing system are available in the prior art and are not described again.
For further better explanation of the present invention, the following specific examples are provided:
a preparation system and method of a transformer oil anti-gassing component comprises the following steps:
step 1): introducing the raw materials extracted from the aromatic hydrocarbon extraction xylene tower 1 into a preheating furnace 2 to obtain a preheating material;
step 2): introducing the preheated material into a molecular distillation tower 3 for molecular distillation, removing aromatic hydrocarbon extraction solvent impurities through molecular distillation, and extracting a residual steam solution and a distilled liquid which are higher than 95 ℃ from the bottom;
step 3): introducing the residual liquid into a fractionating tower 4 for fractionating, and extracting product liquid and transformer oil anti-gassing components with the temperature of more than 200 ℃ from a product liquid outlet 109 at the lower part of the product fractionating tower 4 after fractional cutting;
step 4): the step 3 is carried out, and simultaneously, the distilled liquid is introduced into a separation device 6 for aromatic hydrocarbon extraction solvent, and the distilled liquid is recovered.
The composition of heavy aromatics in the feedstock extracted from the aromatics extraction xylene column 1 in the examples is shown in Table 1, and the detailed operating conditions of the examples are shown in Table 2.
Comparative example:
1) Introducing the raw materials extracted from the aromatic hydrocarbon extraction xylene tower 1 into a preheating furnace 2 to obtain a preheating material;
2) And (3) introducing the preheated material into a fractionating tower 4 for fractionating, and extracting product liquid with the temperature of more than 200 ℃ and the anti-gassing component of the transformer oil from a product liquid outlet of the fractionating tower 4 after fractional cutting, namely 109.
Table 1 the heavy aromatic components in the feedstock extracted from the column for extracting xylenes in the examples constitute
Table 2 comparison of parameters of examples and comparative examples
The influence of commercially available transformer oil and transformer oil added with the gassing-resistant component prepared in the examples on its typical properties is shown in Table 3.
TABLE 3 influence of commercially available Transformer oil and gas-evolving resistant component of the transformer oil prepared in the examples added on its typical properties
The gassing resistance of the transformer oil is obviously improved after the gassing resistance component of the transformer oil is added into the transformer oil, and the oxidation stability of the transformer oil is not affected.
The above examples are provided for the purpose of clearly illustrating the invention and are not to be construed as limiting the invention, and other variants and modifications of the various forms may be made by those skilled in the art based on the description, which are not intended to be exhaustive of all embodiments, and obvious variants or modifications of the invention may be found within the scope of the invention.
Claims (10)
1. The preparation system of the anti-gassing component of the transformer oil is characterized by comprising an aromatic extraction xylene tower (1), a preheating furnace (2), a molecular distillation tower (3), a fractionating tower (4), a product storage tank (5) and a separation device (6), wherein a raw material outlet (101) is arranged on the aromatic extraction xylene tower (1), a raw material inlet (102) and a preheating material outlet (103) are arranged on the preheating furnace (2), the raw material outlet (101) is connected with the raw material inlet (102), a preheating material inlet (104), a distilled liquid outlet (106) and a distilled liquid outlet (105) are arranged on the molecular distillation tower (3), and the preheating material outlet (103) is connected with the preheating material inlet (104); be provided with on fractionating tower (4) and evaporate raffinate entry (107), accessory substance export (108) and product liquid export (109), evaporate raffinate export (105) and evaporate raffinate entry (107) and link to each other, be equipped with product liquid entry (110) on product storage tank (5), product liquid export (109) link to each other with product liquid entry (110), be equipped with on separator (6) and evaporate out liquid entry (111), evaporate out liquid exit (106) and evaporate out liquid entry (111) and link to each other.
2. The system for preparing an anti-gassing component of transformer oil of claim 1 wherein: the raw material outlet (101) is arranged at the bottom end of the aromatic hydrocarbon extraction xylene tower (1), the preheating material outlet (103) is arranged at the bottom end of the preheating furnace (2), the distilled liquid outlet (106) and the distilled liquid outlet (105) are arranged at the bottom end of the molecular distillation tower (3), and the product liquid outlet (109) is arranged at the lower part of the fractionating tower (4).
3. A system for preparing a transformer oil gassing resistant component according to claim 2 wherein: the raw material inlet (102) is arranged at the upper part of the preheating furnace (2), the preheating material inlet (104) is arranged at the top end of the molecular distillation tower (3), the byproduct outlet (108) is arranged at the top end of the fractionating tower (4), and the product liquid inlet (110) is arranged at the top end of the product storage tank (5).
4. A system for preparing a transformer oil gassing resistant component according to claim 3 wherein: the molecular distiller in the molecular distillation tower (3) adopts a wiped film molecular distiller with a Viscon type scraper mechanism.
5. A method for preparing a component of transformer oil with gassing resistance, characterized in that the preparation system of the component of transformer oil with gassing resistance according to any one of claims 1-4 is used for refining, and the specific steps are as follows:
s1: introducing the raw materials extracted by the aromatic hydrocarbon extraction xylene tower (1) into the preheating furnace (2) for preheating to obtain a preheated material;
s2: introducing the preheated material in the step S1 into the molecular distillation tower (3) for molecular distillation to remove the impurities of the aromatic hydrocarbon extraction solvent, and obtaining a distilled liquid and a distilled liquid;
s3: introducing the residual steam in the step S2 into the fractionating tower (4) for fractionating, obtaining product liquid and transformer oil anti-gassing components with the temperature higher than 200 ℃ after fractional cutting by the fractionating tower (4), pumping the product liquid and the transformer oil anti-gassing components from the fractionating tower (4) into the product storage tank (5), and discharging byproducts generated in the fractionating tower (4) from the byproduct outlet (108);
s4: and (3) introducing the distilled liquid in the step S2 into the separation device (6) to separate the aromatic hydrocarbon extraction solvent.
6. The method for producing an anti-gassing component of transformer oil according to claim 5 wherein the thickness of the liquid film in the molecular still in the molecular distillation column (3) is in the range of 0.05-0.5mm.
7. The method for producing an anti-gassing component of transformer oil according to claim 5 wherein the cold and hot face spacing in the molecular distillation column (3) is in the range of 20-30mm.
8. The method for preparing a transformer oil gassing resistant component according to claim 5 wherein the heat source of the preheating furnace (2) is high temperature hydrogen, which is a byproduct of the reforming reaction, and the preheating temperature of the preheating outlet (103) is 50-55 ℃.
9. The method for producing an anti-gassing component of transformer oil according to claim 5 wherein the molecular still in the molecular distillation column (3) has a distillation temperature in the range of 85-110 ℃ and the condensing agent in the molecular distillation column (3) has a temperature in the range of 10-20 ℃.
10. The method for producing an anti-gassing component of transformer oil according to claim 5 wherein the molecular distillation column (3) is operated at a pressure in the range of 0.01 to 1.33Pa.
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