CN102719266B - Heavy oil short-path distillation (molecular distillation) continuous production process - Google Patents
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Abstract
A heavy oil short-path distillation (molecular distillation) continuous production process includes the steps of subjecting heavy oil raw materials of residual oil, wax oil, oil slurry, fuel oil and the like to pretreatment; preheating the raw oil, removing water and dissolvable gases from the raw oil in a degassing dry tower, continuing to heat the raw oil, feeding the raw oil into a rectifying tower and removing light oil; then feeding the raw oil into a first-stage short-path distiller, using conduction oil to heat the raw oil and subjecting the raw oil to cutting and separation to obtain first-stage light phase oil and first-stage heavy phase oil; feeding the first-stage light phase oil into a second-stage short-path distiller and separating the first-stage light phase oil to obtain a 2# mixed aromatic oil product and a 3# mixed aromatic oil product; and feeding the first-stage heavy phase oil into the second-stage short-path distiller, heating the first-stage heavy phase oil and separating the first-stage heavy phase oil to obtain a 4# mixed aromatic oil product and a raffinate superheavy aromatic product. Compared with conventional distillation processes, the heavy oil short-path distillation (molecular distillation) continuous production process is low in operation temperature and distillation pressure, short in heating time, high in separation degree, small in investments of fields and devices and the like.
Description
Technical field
The present invention relates to Petroleum Processing Technology field, especially heavy oil distillation producing process; This heavy oil is through short-path distillation production technique, and for medium and small enterprise, take residual oil, wax oil, slurry oil, fuel wet goods is raw material; In-depth processing, increases added value, improves Business Economic Benefit.To oil refining enterprise's a kind of heavy oil upgrading Technology that has been also many.
Background technology
Along with application and the development of various isolation technique, short-path distillation (molecular distillation) technology is more and more favored, especially separated for high boiling point and heat-sensitive substance.Short-path distillation (molecular distillation) technology, as a kind of novel, effective separation means, since the 30's of 20th century occur, has obtained the attention of countries in the world.To the 60's of 20th century, be successfully applied to extract the suitability for industrialized production of vitamin A from Oils,glyceridic,cod-liver.So far, the developed country such as U.S., day, moral, Soviet Union's (front) designs and manufactures many cover industrialization short-path distillations (molecular distillation) device in succession.According to investigations, external for the production of more than 100 range of product.
China about 20th century the nineties short-path distillation technology start in industrial acquisition application, and develop the vegetables oil in food service industry successively, oleum lini, Rice pollard oil, gingerol, lactic acid etc. rapidly; Vitamin-E in pharmaceutical industries, Oils,glyceridic,cod-liver, natural or synthesising complex E, β-carotene, glucose-derivative etc.; Glyceryl ester in chemical industry, weedicide, sterilant, silicone oil, binary of fatty acids etc.; Vaseline in petroleum industry, waste lubricating oil, dissolving recovery, biofuel etc.; Rose oil in cosmetic industry, alkyl polyglycoside, wool lipid acid etc., obtained developing widely and applying.At present, along with the favor of people to crude substance, the trend of back to nature is risen, the continuous appearance of product innovation, and molecule short-path distillation technology has obtained developing rapidly.
Oil fuel due to all kinds of residual oil, slurry oil and other types, its complicated components, there is thermo-sensitivity, viscosity, boiling point high, the more approaching mixture of some component boiling point wherein, need to adopt precise distillation technology, realizing key ingredient can clear cutting apart, and guarantees high yield and the high density of valuable constituent, there is higher separation efficiency, distillation plant and technology are had higher requirement.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, and heavy oil short-path distillation (molecular distillation) continuous production processes is provided.
The present invention solves the problems of the technologies described above adopted technical scheme: heavy oil short-path distillation (molecular distillation) continuous production processes, it is to be raw material residual oil, wax oil, slurry oil, fuel wet goods with heavy oil, it is characterized in that through pre-treatment, through secondary filter, heat exchange, heating, temperature is at 100-230 ℃, pressure, at 500-3000Pa, is first deviate from moisture, dissolved gas and deviates from low boiling component through rectifying tower by degassed drying tower, then enter one-level short-distance distiller, by heat-conducting oil heating, arrive 240-260 ℃, pressure is at 5-20Pa, cutting and separating goes out one-level, and gently oil and one-level heavy phase are oily mutually, one-level gently mutually oil after surge tank, enter the light phase secondary of one-level short-distance distiller, by heat-conducting oil heating, arrive 215-250 ℃, pressure is at 5-20Pa, by one-level gently mutually separating of oil acquisition 2# BTX aromatics oil and 3# BTX aromatics oil production, one-level heavy phase enters one-level heavy phase secondary short-distance distiller, by heat-conducting oil heating, arrive 270-290 ℃, pressure is at 5-20Pa, by the separating of oil acquisition of one-level heavy phase 4# BTX aromatics oil and residual night overweight aromatic hydrocarbon product.
Described heavy oil is residual oil, wax oil, slurry oil, oil fuel
Described pre-treatment is that secondary filter removes the solia particle in stock oil, through heat exchange and preheating, temperature is at 100-110 ℃, enter degassed drying tower, tower internal pressure 500-1000Pa, deviates from raw material water content in oil and dissolved gas, and then to 180-200 ℃, enter rectifying tower through heat exchange, Heating temperature, by rectifying tower bottom reboiler with thermal oil by heating raw materials to 200-240 ℃, tower internal pressure, at 2000-3000Pa, is isolated lower boiling lightweight oil component product in rectifying tower.
Described one-level short-path distillation is, with thermal oil, temperature of charge in device is heated to 240-260 ℃, and pressure is at 5-20Pa, and stock oil cutting and separating is gone out to one-level, and gently oil and one-level heavy phase are oily mutually.
Described one-level gently mutually oil after surge tank, by heat-conducting oil heating, to 200-230 ℃, enter the light phase secondary of one-level short-distance distiller, by heat-conducting oil heating, to 215-250 ℃, pressure is at 5-20Pa, separated 2# BTX aromatics oil and the 3# BTX aromatics oil production of obtaining.
Described a kind of heavy oil short-path distillation (molecular distillation) production technique, it is characterized in that described one-level heavy phase oil is after surge tank, enter one-level heavy phase secondary short-distance distiller, by heat-conducting oil heating, arrive 270-290 ℃, pressure is at 5-20Pa, separated obtain 4# BTX aromatics oil and residual night overweight aromatic hydrocarbon product.
The object of the invention is all to adopt tower distillation for the conventional separate mode of present oil product, short-path distillation (molecular distillation) is possessing the incomparable advantage of many conventional distillations.Such as service temperature is low, distillation pressure is low, heated time is short, separation degree is high, place and facility investment less etc.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation below.
Fig. 1, course of processing figure of the present invention
Fig. 2, process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described.The invention relates to heavy oil short distance (molecular distillation) continuous production processes, first heavy oil feedstock is taken off after light oil through pre-treatment dehydration, through one-level short-path distillation, cutting and separating goes out one-level, and gently oil and one-level heavy phase are oily mutually; One-level is gently oily mutually obtains 2# BTX aromatics oil and 3# BTX aromatics oil production through secondary short-path distillation cutting analysis; One-level heavy phase oil through secondary short-path distillation separated obtain 4# BTX aromatics oil and residual night overweight aromatic hydrocarbon product.
Embodiment of the present invention is as follows:
1, pre-treatment
Heavy oil feedstock is heated to 100-110 ℃ and enters degassed drying tower through filtration, heat exchange, tower internal pressure is controlled at 500-1000Pa, deviate from raw material water content in oil and dissolved gas, degassed dried heavy oil feedstock enters rectifying tower through heat exchange, Heating temperature to 180-200 ℃, by rectifying tower bottom reboiler with thermal oil by heating raw materials to 200-240 ℃, tower internal pressure is deviate from lightweight oil under 2000-3000Pa condition, obtains 1# BTX aromatics oil production;
2, one-level short-path distillation
From rectifying tower stock oil out, enter respectively uniformly the one-level short-distance distiller of two parallel operations, two one-level short-distance distillers by raw material gently oil and heavy phase are separating of oil mutually.Device internal pressure is controlled at 5-20Pa, thermal oil arrives 240-260 ℃ through short-distance distiller cylinder shell chuck by heating material, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, the about 60-100 ℃ of temperature, from short-distance distiller bottom, discharge light phase component oil, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 240-260 ℃, discharge port by short-distance distiller side flows out, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses 0--5 ℃ of refrigerating fulid by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
3, the light phase secondary of one-level short-path distillation
The one-level of separating from two one-level short-path distillations is respectively gently oily mutually, through being mixed into surge tank, through hotline heater, be heated 200-230 ℃ and enter the light phase secondary of one-level short-distance distiller, pressure-controlling is at 5-20Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is continued to be heated to 215-250 ℃ of heating light phase component effusion afterwards, in built-in condenser in short-distance distiller, be condensed into liquid, the about 60-100 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 2# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 215-250 ℃, discharge port by short-distance distiller side flows out, obtain 3# BTX aromatics oil production, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses 0--5 ℃ of refrigerated water by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
4, one-level heavy phase secondary short-path distillation
The one-level heavy phase oil of separating from two one-level short-path distillations respectively, through being mixed into surge tank, enter one-level heavy phase secondary short-distance distiller, pressure-controlling is at 5-20Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is heated to 270-290 ℃ from 240-260 ℃, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, the about 60-100 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 4# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 260-280 ℃, discharge port by short-distance distiller side flows out, obtain the overweight aromatic hydrocarbon product of raffinate, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses 0--5 ℃ of refrigerating fulid by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
Example 1:
Getting 10KG catalytic slurry follows these steps to implement
1, pre-treatment
Heavy oil feedstock is heated to 105 ℃ and enters degassed drying tower through filtration, heat exchange, tower internal pressure is controlled at 600Pa, deviate from raw material water content in oil and dissolved gas, degassed dried heavy oil feedstock enters rectifying tower through heat exchange, Heating temperature to 180 ℃, by rectifying tower bottom reboiler with thermal oil by heating raw materials to 220 ℃, tower internal pressure is deviate from lightweight oil under 2000Pa condition, obtains 1# BTX aromatics oil production;
2, one-level short-path distillation
From rectifying tower stock oil out, enter respectively uniformly the one-level short-distance distiller of two parallel operations, two one-level short-distance distillers by raw material gently oil and heavy phase are separating of oil mutually.Device internal pressure is controlled at 10Pa, thermal oil through short-distance distiller cylinder shell chuck by heating material to 245 ℃, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 60 ℃ of temperature, from short-distance distiller bottom, discharge light phase component oil, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 245 ℃, discharge port by short-distance distiller side flows out, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerated waters by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
3, the light phase secondary of one-level short-path distillation
The one-level of separating from two one-level short-path distillations is respectively gently oily mutually, through being mixed into surge tank, through hotline heater, be heated 190 ℃ and enter the light phase secondary of one-level short-distance distiller, pressure-controlling is at 10Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is continued to be heated to 215 ℃ of heating light phase component effusion afterwards, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 60 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 2# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 215 ℃, discharge port by short-distance distiller side flows out, obtain 3# BTX aromatics oil production, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerated waters by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
4, one-level heavy phase secondary short-path distillation
The one-level heavy phase oil of separating from two one-level short-path distillations respectively, through being mixed into surge tank, enter one-level heavy phase secondary short-distance distiller, pressure-controlling is at 10Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is heated to 270 ℃ from 230 ℃, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 70 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 4# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 270 ℃, discharge port by short-distance distiller side flows out, obtain the overweight aromatic hydrocarbon product of raffinate, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerating fulids by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
The results are shown in table 1
Table 1 product yield and quality index
Example 2:
Getting 10KG 380# oil fuel follows these steps to implement
1, pre-treatment
Heavy oil feedstock is heated to 105 ℃ and enters degassed drying tower through filtration, heat exchange, tower internal pressure is controlled at 600Pa, deviate from raw material water content in oil and dissolved gas, degassed dried heavy oil feedstock enters rectifying tower through heat exchange, Heating temperature to 180 ℃, by rectifying tower bottom reboiler with thermal oil by heating raw materials to 220 ℃, tower internal pressure is deviate from lightweight oil under 2000Pa condition, obtains 1# BTX aromatics oil production;
2, one-level short-path distillation
From rectifying tower stock oil out, enter respectively uniformly the one-level short-distance distiller of two parallel operations, two one-level short-distance distillers by raw material gently oil and heavy phase are separating of oil mutually.Device internal pressure is controlled at 10Pa, thermal oil through short-distance distiller cylinder shell chuck by heating material to 245 ℃, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 60 ℃ of temperature, from short-distance distiller bottom, discharge light phase component oil, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 245 ℃, discharge port by short-distance distiller side flows out, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerated waters by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
3, the light phase secondary of one-level short-path distillation
The one-level of separating from two one-level short-path distillations is respectively gently oily mutually, through being mixed into surge tank, through hotline heater, be heated 190 ℃ and enter the light phase secondary of one-level short-distance distiller, pressure-controlling is at 10Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is continued to be heated to 215 ℃ of heating light phase component effusion afterwards, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 60 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 2# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 215 ℃, discharge port by short-distance distiller side flows out, obtain 3# BTX aromatics oil production, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerated waters by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
4, one-level heavy phase secondary short-path distillation
The one-level heavy phase oil of separating from two one-level short-path distillations respectively, through being mixed into surge tank, enter one-level heavy phase secondary short-distance distiller, pressure-controlling is at 10Pa, thermal oil is through short-distance distiller cylinder shell chuck, material is heated to 260 ℃ from 230 ℃, after heating, light phase component is overflowed, in built-in condenser in short-distance distiller, be condensed into liquid, approximately 60 ℃ of temperature, from short-distance distiller bottom, discharge, obtain 4# BTX aromatics oil production, the circular passage of heavy phase component oil in short-distance distiller, collect, temperature is about 260 ℃, discharge port by short-distance distiller side flows out, obtain the overweight aromatic hydrocarbon product of raffinate, in short-distance distiller, noncondensable gas is introduced cold-trap, cold-trap uses-5 ℃ of refrigerating fulids by the further condensation of noncondensable gas, incondensible noncondensable gas still after cold-trap, through vacuum unit, its extraction is entered to atmosphere.
The results are shown in table 2
Table 2 product yield and quality index
Most preferred embodiment of the present invention is illustrated, and the various variations of being made by those of ordinary skills or remodeling can not depart from the scope of the present invention.
Claims (1)
1. heavy oil short-path distillation (molecular distillation) continuous production processes, it is to be raw material with heavy oil, it is characterized in that through pre-treatment, through secondary filter, heat exchange, heating, temperature is at 100-230 ℃, pressure, at 500-3000Pa, is first deviate from moisture, dissolved gas and deviates from low boiling component through rectifying tower by degassed drying tower, then enter one-level short-distance distiller, by heat-conducting oil heating, arrive 240-260 ℃, pressure is at 5-20Pa, cutting and separating goes out one-level, and gently oil and one-level heavy phase are oily mutually, one-level gently mutually oil after surge tank, enter the light phase secondary of one-level short-distance distiller, by heat-conducting oil heating, arrive 215-250 ℃, pressure is at 5-20Pa, by one-level gently mutually separating of oil acquisition 2# BTX aromatics oil and 3# BTX aromatics oil production, one-level heavy phase enters one-level heavy phase secondary short-distance distiller, by heat-conducting oil heating, arrive 270-290 ℃, pressure is at 5-20Pa, by the separating of oil acquisition of one-level heavy phase 4# BTX aromatics oil and the overweight aromatic hydrocarbon product of raffinate, described pre-treatment is that secondary filter removes the solia particle in stock oil, through heat exchange and preheating, temperature is at 100-110 ℃, enter degassed drying tower, tower internal pressure 500-1000Pa, deviate from raw material water content in oil and dissolved gas, and then through heat exchange, Heating temperature enters rectifying tower to 180-200 ℃, by rectifying tower bottom reboiler with thermal oil by heating raw materials to 200-240 ℃, tower internal pressure is at 2000-3000Pa, in rectifying tower, isolate lower boiling lightweight oil component product, described one-level short-path distillation is, with thermal oil, temperature of charge in device is heated to 240-260 ℃, pressure is at 5-20Pa, stock oil cutting and separating is gone out to one-level, and gently oil and one-level heavy phase are oily mutually, described one-level is gently oily after surge tank mutually, by heat-conducting oil heating, arrive 200-230 ℃, enter the light phase secondary of one-level short-distance distiller, by heat-conducting oil heating, arrive 215-250 ℃, pressure is at 5-20Pa, separated 2# BTX aromatics oil and the 3# BTX aromatics oil production of obtaining, described one-level heavy phase oil is after surge tank, enter one-level heavy phase secondary short-distance distiller, by heat-conducting oil heating, arrive 270-290 ℃, pressure is at 5-20Pa, separated 4# BTX aromatics oil and the overweight aromatic hydrocarbon product of raffinate of obtaining.
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| CN109486526A (en) * | 2018-12-29 | 2019-03-19 | 大连隆星新材料有限公司 | High melting point paraffin or microwax molecular distillation continuous production processes |
| CN112745928A (en) * | 2019-10-30 | 2021-05-04 | 宁波博汇化工科技股份有限公司 | Treatment method of catalytic slurry oil |
| CN112426739A (en) * | 2020-10-16 | 2021-03-02 | 安庆缘启医药科技有限公司 | Preparation process for extracting anticancer medicine by molecular distillation |
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| CN101717691A (en) * | 2009-10-30 | 2010-06-02 | 华南理工大学 | Method for refining cosmetic camellia oil by adopting short-path distillation |
| CN101717690A (en) * | 2009-10-30 | 2010-06-02 | 华南理工大学 | Method for refining camellia oil by adopting short-path distillation |
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| CN102373108B (en) * | 2010-08-18 | 2013-09-25 | 北京金隅红树林环保技术有限责任公司 | Process method for producing base oil by regenerating waste lubricating oil |
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| CN101717691A (en) * | 2009-10-30 | 2010-06-02 | 华南理工大学 | Method for refining cosmetic camellia oil by adopting short-path distillation |
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