CN113398620A - Device and method for enriching durene by dividing wall tower process - Google Patents
Device and method for enriching durene by dividing wall tower process Download PDFInfo
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- CN113398620A CN113398620A CN202110792382.6A CN202110792382A CN113398620A CN 113398620 A CN113398620 A CN 113398620A CN 202110792382 A CN202110792382 A CN 202110792382A CN 113398620 A CN113398620 A CN 113398620A
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- Prior art keywords
- fractionating tower
- durene
- tower
- pump
- liquid
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- SQNZJJAZBFDUTD-UHFFFAOYSA-N durene Chemical compound CC1=CC(C)=C(C)C=C1C SQNZJJAZBFDUTD-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000010992 reflux Methods 0.000 claims abstract description 27
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 18
- 238000009835 boiling Methods 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- UOHMMEJUHBCKEE-UHFFFAOYSA-N prehnitene Chemical compound CC1=CC=C(C)C(C)=C1C UOHMMEJUHBCKEE-UHFFFAOYSA-N 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 238000005194 fractionation Methods 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 150000004945 aromatic hydrocarbons Chemical class 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- 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
- C10G7/00—Distillation of hydrocarbon oils
-
- 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
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/06—Vacuum distillation
-
- 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
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/12—Controlling or regulating
Abstract
The invention provides a device for enriching durene by a dividing wall column process, wherein C10 heavy aromatic hydrocarbon as a raw material enters the middle part of the feeding side of a partition plate of a fractionating column, light components with a boiling point lower than that of durene and heavy components with a boiling point higher than that of durene are separated at the feeding side respectively, gas phase at the top of the column is totally condensed and then enters a reflux tank of the fractionating column, and condensate is taken as reflux by a reflux pump and returns to the column from the top of the fractionating column. And (4) extracting a high-boiling-point solvent oil product from the rectifying section at the top of the fractionating tower. Liquid in the filling section at the upper part of the partition board is fully extracted to the distribution tank through liquid, durene is partially enriched in the filling section at the middle part of the product side, and a durene enrichment liquid is extracted at the position and is sent out through a durene enrichment liquid extraction pump. And the heavy components at the bottom of the tower are extracted and then sent out. The reboiler at the bottom of the tower takes heat-conducting oil as a heat source. The invention is suitable for producing durene, and has the advantages of small equipment investment and low production energy consumption.
Description
Technical Field
The invention relates to a durene production device, in particular to a device for enriching durene from a reformed carbon decaarene raw material and producing a high-boiling-point arene solvent.
Background
Durene is enriched from carbon ten raw materials, in the prior art, three rectifying towers are divided, light components in the raw materials are respectively extracted from the top of one tower, the enriched durene is extracted from the top of the second tower, and then the heavy components of the raw materials are cut by the three towers to produce byproducts. There are many disadvantages to this process. Firstly, the equipment investment is large, and the investment cost is high due to the three towers and the attached equipment; secondly, the energy consumption is large in the production process, three heating systems are arranged on the three towers, and the energy consumption is high; thirdly, the operation process is complex, the operator needs to operate the three towers simultaneously for the operation of the site and the central control, and the operation difficulty is high. On the whole, the factors such as large equipment investment, high energy consumption and the like which are not beneficial to reducing the production cost exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device suitable for producing durene, and the device has small equipment investment and low production energy consumption.
In order to solve the problems, the device for enriching durene by a partition wall tower process comprises a fractionating tower, wherein a first filling section, a second filling section, a liquid collecting tray and a third filling section are arranged in the fractionating tower from bottom to top, a partition plate is vertically arranged in the fractionating tower through the second filling section, a tower top pipeline of the fractionating tower is connected with a cooler, a cooler pipeline is connected with a reflux tank, and the reflux tank is connected to the top of the fractionating tower through a reflux pump pipeline; and the pipeline at the third packing section of the fractionating tower is connected with a high-boiling point solvent oil extraction pump for extracting high-boiling point solvent oil. And the second filling section of the fractionating tower and a product side pipeline of the partition plate are connected with a durene enrichment liquid extraction pump for extracting durene enrichment liquid. The liquid collecting tray of the fractionating tower is connected with a distribution tank through a pipeline, the distribution tank is connected with a distribution pump through a pipeline, the output end of the distribution pump is connected to the middle part of the fractionating tower through a pipeline, and particularly, the liquid collecting tray is connected to the fractionating tower between the second filling section and the liquid collecting tray; during operation, the distribution liquid is pumped into the fractionating tower again through the distribution pump. And a bottom pipeline of the fractionating tower is connected with a heavy component pump for extracting heavy components. The upper pipeline of the fractionating tower below the first packing section is connected with a reboiler.
The invention also provides a method for enriching durene from a reformed carbon decaarene raw material and producing a high-boiling-point arene solvent by using the device, which specifically comprises the following steps:
controlling the tower top pressure of the fractionating tower to be 20-40 Kpa and the temperature to be 130 +/-5 ℃; feeding the carbon ten raw material into the middle of the feeding side of a partition plate of a fractionating tower at the temperature of 60-80 ℃, separating light components with a boiling point lower than that of tetramethylbenzene and heavy components with a boiling point higher than that of tetramethylbenzene at the feeding side, condensing a gas phase at the top of the tower to 70-80 ℃ through a cooler, feeding the gas phase into a reflux tank of the fractionating tower, and returning condensate in the reflux tank to the tower from the top of the fractionating tower as reflux through a reflux pump;
and (3) extracting the high-boiling-point solvent oil from the upper side line of the fractionating tower through a high-boiling-point solvent oil extraction pump at 135-145 ℃, and sending the high-boiling-point solvent oil to a product tank area after the high-boiling-point solvent oil is detected to be qualified.
And (3) extracting the pyromellitic enrichment liquid and the durene enrichment liquid from the middle lateral line of the fractionating tower through a durene enrichment liquid extraction pump at the temperature of 150-160 ℃.
Liquid in the filler section at the upper part of the partition plate of the fractionating tower is gathered to a liquid collecting tray, the liquid is completely extracted to a distribution tank at the temperature of 150-160 ℃, and then the liquid is pumped into the fractionating tower again through a distribution pump.
Heavy components at the bottom of the fractionating tower are extracted and sent out by a heavy component pump. The reboiler at the bottom of the tower takes heat-conducting oil as a heat source.
In the invention, in order to reduce the heating temperature and improve the relative volatility of key components, the rectification tower adopts decompression operation, and the pressure at the top of the rectification tower is controlled to be 20-40 Kpa.
The technical advantages of the invention are embodied in that: the method has the advantages of small equipment investment and low production energy consumption by utilizing the bulkhead tower process to cut and reform the deca-aromatic hydrocarbon and enrich durene.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for enriching durene by a dividing wall column process according to the present invention.
Detailed Description
The general idea of the invention is as follows: c10 heavy aromatic hydrocarbon as raw material is fed into the middle of the feeding side of the partition board of the fractionating tower, light components with a boiling point lower than that of tetramethylbenzene and heavy components with a boiling point higher than that of tetramethylbenzene are separated at the feeding side respectively, the gas phase at the top of the tower is totally condensed and then fed into a reflux tank of the fractionating tower, and the condensate is taken as reflux by a reflux pump and returned to the tower from the top of the fractionating tower. And (4) extracting a high-boiling-point solvent oil product from the rectifying section at the top of the fractionating tower. Liquid in the filling section at the upper part of the partition board is fully extracted to the distribution tank through liquid, durene is partially enriched in the filling section at the middle part of the product side, and a durene enrichment liquid is extracted at the position and is sent out through a durene enrichment liquid extraction pump. And the heavy components at the bottom of the tower are extracted and then sent out. The reboiler at the bottom of the tower takes heat-conducting oil as a heat source. In order to reduce the heating temperature and improve the relative volatility of key components, the rectification tower is operated under reduced pressure, and the pressure is controlled between 20 and 40 Kpa.
As shown in fig. 1, the apparatus for enriching durene by a dividing wall column process of the present invention comprises a fractionating column T1, wherein a first packing section T1-1, a second packing section T1-2, a liquid collecting tray T1-3 and a third packing section T1-4 are arranged in the fractionating column T1 from bottom to top, a partition T1-5 is vertically arranged in the fractionating column T1 through the second packing section T1-2, a top pipeline of the fractionating column T1 is connected with a cooler E2, a pipeline of the cooler E2 is connected with a reflux tank D1, and a reflux tank D1 is connected to the top of the fractionating column T1 through a reflux pump P5 pipeline; and a high-boiling point solvent oil extraction pump P1 is connected to the fractionating tower T1 at the third packing section T1-4 through a pipeline and is used for extracting high-boiling point solvent oil. And a durene enrichment liquid extraction pump P2 is connected to the product side pipeline of the partition plate at the position of a second filling section T1-2 of the fractionating tower T1 and is used for extracting durene enrichment liquid. A liquid collecting tray T1-3 of the fractionating tower T1 is connected with a distribution tank D2 through a pipeline, the distribution tank D2 is connected with a distribution pump P4 through a pipeline, and the output end of the distribution pump P4 is connected to the middle part of a fractionating tower T1 through a pipeline, and is particularly connected between a second filling material section T1-2 and the liquid collecting tray T1-3; in operation, the liquid is re-pumped via distributor pump P4 into fractionator T1. And a bottom pipeline of the fractionating tower T1 is connected with a heavy component pump P3 for extracting heavy components. A reboiler E1 is connected to the upper pipeline of the fractionating tower T1 below the first packing section T1-1.
As can be seen in FIG. 1, the height of the partition T1-5 matches that of the second fill section T1-2 and divides the column into a left feed side and a right product side in the second fill section. The upper end of the clapboard T1-5 does not exceed the liquid collecting tray T1-3, and the lower end does not exceed the first filling section T1-1.
The invention also provides a method for enriching durene from a reformed carbon decaarene raw material and producing a high-boiling-point arene solvent by using the device, which specifically comprises the following steps:
the overhead pressure of the fractionating tower T1 is controlled at 20-40 Kpa, and the temperature is controlled at 130 +/-5 ℃; feeding the carbon ten raw material into the middle of a partition plate T1-5 of a fractionating tower T1 at the temperature of 60-80 ℃, separating light components with a lower boiling point than tetramethylbenzene and heavy components with a higher boiling point than tetramethylbenzene at the feeding side, condensing a gas phase at the top of the tower to 70-80 ℃ through a cooler E2, feeding the gas phase into a reflux tank D1 of the fractionating tower, and taking condensate in the reflux tank D1 as reflux through a reflux pump P5 to be ejected back to the tower from a fractionating tower T1;
and (3) extracting the high-boiling-point solvent oil from the upper side line of the fractionating tower T1 through a high-boiling-point solvent oil extraction pump P1 at 135-145 ℃, and sending the high-boiling-point solvent oil to a product tank area after the high-boiling-point solvent oil is detected to be qualified.
Under the condition that the lateral line of the middle part of the fractionating tower T1 is at 150-160 ℃, pyromellitic enriched liquid and durene enriched liquid are extracted by a durene enriched liquid extraction pump P2.
Liquid in a filler section at the upper part of a partition plate of the fractionating tower T1 is gathered to a liquid collecting tray T1-3, the liquid is fully extracted to a distribution tank D2 at the temperature of 150-160 ℃, and then the liquid is pumped into the fractionating tower T1 again through a distribution pump P4.
Heavy components at the bottom of the fractionating tower T1 are extracted and sent out through a heavy component pump P3 at the temperature of 190-200 ℃. The reboiler E1 at the bottom of the tower takes heat transfer oil as a heat source. To reduce the heating temperature and increase the relative volatility of the key components, the rectification column T1 is operated at reduced pressure, and the pressure at the top of the column is controlled to be 20 to 40 Kpa.
The embodiments of the present invention include, but are not limited to, the above-mentioned embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the substance of the present invention, and still fall into the scope of the present invention.
Claims (2)
1. An apparatus for the enrichment of durene in a dividing wall column process, comprising a fractionation column (T1), characterized in that: a first filling section (T1-1), a second filling section (T1-2), a liquid collecting tray (T1-3) and a third filling section (T1-4) are arranged in the fractionating tower (T1) from bottom to top, a partition plate (T1-5) is vertically arranged in the fractionating tower (T1) through the second filling section (T1-2), a cooler (E2) is connected to a tower top pipeline of the fractionating tower (T1), a reflux tank (D1) is connected to the cooler (E2) through a pipeline, and the reflux tank (D1) is connected to the top of the fractionating tower (T1) through a reflux pump (P5); the fractionating tower (T1) is connected with a high boiling point solvent oil extraction pump (P1) at the third packing section (T1-4) through a pipeline and is used for extracting high boiling point solvent oil; the second filling section (T1-2) of the fractionating tower (T1) and a product side pipeline of the partition are connected with a durene enrichment liquid extraction pump (P2) for extracting durene enrichment liquid; the liquid collecting tray (T1-3) of the fractionating tower (T1) is connected with a distribution tank (D2) through a pipeline, the distribution tank (D2) is connected with a distribution pump (P4) through a pipeline, and the output end of the distribution pump (P4) is connected to the middle part of the fractionating tower (T1) through a pipeline; the bottom pipeline of the fractionating tower (T1) is connected with a heavy component pump (P3); a reboiler (E1) is connected to the fractionating tower (T1) below the first packing section (T1-1).
2. A method for enriching durene from a reformed carbon decaaromatic hydrocarbon feedstock using the apparatus of claim 1, comprising:
the overhead pressure of the fractionating tower (T1) is controlled at 20-40 Kpa, and the temperature is controlled at 130 +/-5 ℃; feeding the carbon ten raw material into the middle of the feeding side of a partition plate (T1-5) of a fractionating tower (T1) at the temperature of 60-80 ℃, separating light components with a boiling point lower than that of tetramethylbenzene and heavy components with a boiling point higher than that of tetramethylbenzene at the feeding side, condensing a gas phase at the top of the tower to 70-80 ℃ through a cooler (E2), feeding the gas phase into a reflux tank (D1) of the fractionating tower, and taking the condensate in the reflux tank (D1) as reflux through a reflux pump (P5) and pushing the condensate back to the fractionating tower (T1);
extracting high-boiling-point solvent oil from a side line at the upper part of a fractionating tower (T1) through a high-boiling-point solvent oil extraction pump (P1) at 135-145 ℃;
collecting a sym-tetratoluene enrichment solution and a sym-tetratoluene enrichment solution from a side line in the middle of a fractionating tower (T1) through a sym-tetratoluene enrichment solution collecting pump (P2) at the temperature of 150-160 ℃;
liquid in a filler section at the upper part of a partition plate of the fractionating tower (T1) is gathered to a liquid collecting tray (T1-3), the liquid is fully extracted to a distribution tank (D2) at the temperature of 150-160 ℃, and then the liquid is re-pumped into the fractionating tower (T1) through a distribution pump (P4);
heavy components at the bottom of the fractionating tower (T1) are extracted and sent out by a heavy component pump (P3); the reboiler (E1) at the bottom of the tower takes heat transfer oil as a heat source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792382.6A CN113398620A (en) | 2021-07-14 | 2021-07-14 | Device and method for enriching durene by dividing wall tower process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792382.6A CN113398620A (en) | 2021-07-14 | 2021-07-14 | Device and method for enriching durene by dividing wall tower process |
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| CN113398620A true CN113398620A (en) | 2021-09-17 |
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| CN202110792382.6A Pending CN113398620A (en) | 2021-07-14 | 2021-07-14 | Device and method for enriching durene by dividing wall tower process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115487520A (en) * | 2022-08-31 | 2022-12-20 | 扬州中惠制药有限公司 | Time-sharing and fixed-delivery extraction equipment for various traditional Chinese medicines |
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