CN203513527U - Extraction device for butadiene - Google Patents
Extraction device for butadiene Download PDFInfo
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- CN203513527U CN203513527U CN201320696141.2U CN201320696141U CN203513527U CN 203513527 U CN203513527 U CN 203513527U CN 201320696141 U CN201320696141 U CN 201320696141U CN 203513527 U CN203513527 U CN 203513527U
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- divinyl
- tower
- butadiene
- alkynes
- pipeline
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Abstract
The utility model relates to an extraction device for butadiene and belongs to an extracting device of the butadiene. The extraction device comprises a raw material preprocessing device, an extractive distillation device, a butadiene refining device and an extraction agent recycling-regenerating device. According to the technical scheme, the raw material preprocessing device, the extractive distillation device, the butadiene refining device and the extraction agent recycling-regenerating device are sequentially connected by virtue of pipelines, and the extraction agent recycling-regenerating device is connected with the butadiene refining device and an alkyne extractive distillation device by virtue of pipelines, respectively. Due to the technical improvement, the extraction device has the following beneficial effects that the actual application effect is good, the technique is mature, the production process is shortened, and the production efficiency is high.
Description
Technical field
The utility model belongs to divinyl extraction element, is a kind of extraction plant of divinyl specifically.
Background technology
At present from ethylene cracker by-product hybrid C 4 cut, the method for separation of butadiene mainly contains according to the difference of solvent for use: three kinds of acetonitrile method ACN method, dimethyl amide method DMF method and N methylpyrrolidone process NMP methods.High temperature hydrogenation treatment technology exists hydroprocessing technique working pressure higher, and energy consumption is relatively high, follows the generation of acid waste water, need to process to acid waste water the shortcoming that equipment material is had relatively high expectations; Low temperature hydrogenation treatment technology exists because sulphur content in raw material is more, and raw materials pretreatment is relatively complicated, and flow process is longer, and equipment number of units is many, and floor space is large, and the recycling difficulty of the absorption agent of processing raw material is large.Can not remove chlorine, metal impurities, the shortcoming that quality product is relatively poor.
Summary of the invention
In order to address the above problem, it is good that the utility model aims to provide a kind of practical application effect, and technology maturation reduces production process, the extraction plant of the divinyl of the acetonitrile method extracting divinyl of enhancing productivity.
In order to achieve the above object, the utility model adopts following technical scheme:
The extraction plant of divinyl, by raw material preprocessing device, extracting rectifying device, butadiene refining device and extraction agent reclaiming device, formed, as the technical solution of the utility model: raw material preprocessing device, extracting rectifying device, alkynes extracting rectifying device are connected with butadiene refining device successively pipeline, and extraction agent reclaiming device is connected with the mutual pipeline of alkynes extracting rectifying device with butadiene extraction rectifier unit respectively.
As further improvement of the utility model, raw material preprocessing device is connected with the middle part pipeline of decarburization four towers by the bottom of decarburization three towers, and the alkynes of decarburization four tops of tower and butadiene refining device steams tower pipeline and connects and composes.
As further improvement of the utility model, extracting rectifying device is connected with the middle part pipeline that divinyl steams tower by the bottom of extractive distillation column, divinyl steams the top of tower and the middle part pipeline of alkynes extractive distillation column is connected, and alkynes extractive distillation column is connected with butadiene refining device pipeline.
As further improvement of the utility model, butadiene refining device steams tower and butane butylene water wash column and divinyl water wash column pipeline by alkynes and connects and composes.
As further improvement of the utility model, extraction agent reclaiming device is connected and composed with de-heavy oil column middle part pipeline by acetonitrile recovery tower and cut light tower bottom.
The utility model, through above-mentioned technological improvement, has reached following beneficial effect: practical application effect is good, and technology maturation reduces production process, and production efficiency is high.
Accompanying drawing explanation
Fig. 1 is the extraction plant one-piece construction block diagram of divinyl of the present utility model.
Embodiment
The extraction plant of divinyl, by raw material preprocessing device, extracting rectifying device, butadiene refining device and extraction agent reclaiming device, formed, it is characterized in that: raw material preprocessing device, extracting rectifying device, alkynes extracting rectifying device are connected with butadiene refining device successively pipeline, extraction agent reclaiming device is connected with the mutual pipeline of alkynes extracting rectifying device with butadiene extraction rectifier unit respectively.
Described raw material preprocessing device is connected with the middle part pipeline of decarburization four towers by the bottom of decarburization three towers, and the alkynes of decarburization four tops of tower and butadiene refining device steams tower pipeline and connects and composes.
Described extracting rectifying device is connected with the middle part pipeline that divinyl steams tower by the bottom of extractive distillation column, and divinyl steams the top of tower and the middle part pipeline of alkynes extractive distillation column is connected, and alkynes extractive distillation column is connected with butadiene refining device pipeline.
Described butadiene refining device steams tower and butane butylene water wash column and divinyl water wash column pipeline by alkynes and connects and composes.
Described extraction agent reclaiming device is connected and composed with de-heavy oil column middle part pipeline by acetonitrile recovery tower and cut light tower bottom.
The technical process that this device is used is as follows:
(1) raw materials pretreatment system
Raw materials pretreatment system comprises decarburization three towers and decarburization five towers, and first the C 4 fraction of being sent here by splitting gas separation circuit enters decarburization three towers and remove C3 cut, and materials at bottom of tower enters removal of carbon five components after decarburization five towers, obtains refining C 4 fraction.
(2) abstraction distillation system
C 4 fraction after refining enters butadiene extraction rectifying tower after preheating vaporization, and this tower is divided into two sections, totally 120 blocks of column plates, and tower top pressure is 0.45MPa, tower top temperature is 46 ℃, 114 ℃ of tower reactor temperature.C 4 fraction is entered by tower middle part, and acetonitrile is added by tower top, and after separation of extractive distillation, the butane that tower top steams, butene fraction enter butane, the washing of butylene water wash column, and the acetonitrile solution containing divinyl and a small amount of alkynes that tower reactor is discharged, enters divinyl and steam tower.The acetonitrile of discharging in tower reactor in steaming tower recycles for butadiene extraction rectifying tower after cooling, and divinyl, alkynes steam tower top from acetonitrile, and send alkynes extractive distillation column to.After extracting rectifying, tower top divinyl send divinyl water wash column, and the acetonitrile that tower reactor is discharged is sent into alkynes and steamed tower together with alkynes.For preventing vinylacetylene blast, alkynes steams the alkynes cut of tower top must be discontinuously or use continuously butane, butene fraction is diluted, make the content of vinylacetylene lower than 30%(mole), alkynes steams acetonitrile that tower reactor discharges and returns to alkynes and steam tower and recycle, and the alkynes of tower top discharge is sent as fuel.
(3) butadiene treating system
After the acetonitrile that removes trace in divinyl through water elution in divinyl water wash column, the divinyl of tower top send cut light tower, removed overhead propine and a small amount of moisture in tower, for guaranteeing that propine content does not exceed standard, overhead product propine allows to follow the divinyl of 60% left and right, propine in tower reactor divinyl is less than 5ppm, and moisture is less than 10ppm.The divinyl that removes light constituent send de-heavy oil column, removes the heavy constituents such as cis-2-butene, 1，2-butadiene, 2-butyne, dipolymer, acetonitrile and carbon five.Its tower reactor butadiene content is no more than 5%(matter), overhead vapours is finished product divinyl after condensation.
(4) extraction agent reclaiming system
In butane, butylene water wash column and divinyl water wash column, all use water as extraction agent, respectively a small amount of acetonitrile of carrying secretly in butane, butylene and divinyl is extracted and gets off to be sent to acetonitrile recovery tower, tower top steams acetonitrile and water azeotrope, return to extracting rectifying Tower System, the water that tower reactor is discharged, after cooling, send water wash column to recycle.In addition, part acetonitrile is sent to purifying regeneration, and the impurity being accumulated to remove wherein, as salt, dipolymer and polymer etc.
Claims (5)
1. the extraction plant of divinyl, by raw material preprocessing device, extracting rectifying device, butadiene refining device and extraction agent reclaiming device, formed, it is characterized in that: raw material preprocessing device, extracting rectifying device, alkynes extracting rectifying device are connected with butadiene refining device successively pipeline, extraction agent reclaiming device is connected with the mutual pipeline of alkynes extracting rectifying device with butadiene extraction rectifier unit respectively.
2. the extraction plant of divinyl as claimed in claim 1, is characterized in that: raw material preprocessing device is connected with the middle part pipeline of decarburization four towers by the bottom of decarburization three towers, and the alkynes of decarburization four tops of tower and butadiene refining device steams tower pipeline and connects and composes.
3. the extraction plant of divinyl as claimed in claim 1, it is characterized in that: extracting rectifying device is connected with the middle part pipeline that divinyl steams tower by the bottom of extractive distillation column, divinyl steams the top of tower and the middle part pipeline of alkynes extractive distillation column is connected, and alkynes extractive distillation column is connected with butadiene refining device pipeline.
4. the extraction plant of divinyl as claimed in claim 1, is characterized in that: butadiene refining device steams tower and butane butylene water wash column and divinyl water wash column pipeline by alkynes and connects and composes.
5. the extraction plant of divinyl as claimed in claim 1, is characterized in that: extraction agent reclaiming device is connected and composed with de-heavy oil column middle part pipeline by acetonitrile recovery tower and cut light tower bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696141.2U CN203513527U (en) | 2013-11-07 | 2013-11-07 | Extraction device for butadiene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696141.2U CN203513527U (en) | 2013-11-07 | 2013-11-07 | Extraction device for butadiene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203513527U true CN203513527U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320696141.2U Expired - Fee Related CN203513527U (en) | 2013-11-07 | 2013-11-07 | Extraction device for butadiene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203513527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348028A (en) * | 2015-12-07 | 2016-02-24 | 中国天辰工程有限公司 | 1,3-butadiene deep dehydration and purification process |
| CN108218657A (en) * | 2018-01-08 | 2018-06-29 | 惠生工程（中国）有限公司 | A kind of method for recovering tail gas in acetonitrile method Butadiene extraction process |
-
2013
- 2013-11-07 CN CN201320696141.2U patent/CN203513527U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348028A (en) * | 2015-12-07 | 2016-02-24 | 中国天辰工程有限公司 | 1,3-butadiene deep dehydration and purification process |
| CN108218657A (en) * | 2018-01-08 | 2018-06-29 | 惠生工程（中国）有限公司 | A kind of method for recovering tail gas in acetonitrile method Butadiene extraction process |
| CN108218657B (en) * | 2018-01-08 | 2021-04-30 | 惠生工程（中国）有限公司 | Tail gas recovery method in acetonitrile method butadiene extraction process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20201107 |