CN207646094U - The device of alkane, alkene is recycled from olefinic polymerization tail gas - Google Patents
The device of alkane, alkene is recycled from olefinic polymerization tail gas Download PDFInfo
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- CN207646094U CN207646094U CN201721703694.0U CN201721703694U CN207646094U CN 207646094 U CN207646094 U CN 207646094U CN 201721703694 U CN201721703694 U CN 201721703694U CN 207646094 U CN207646094 U CN 207646094U
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- gas
- efferent duct
- alkane
- tail gas
- heat exchanger
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Abstract
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, including：The gaseous phase outlet of heat exchanger, first throttle valve, gas-liquid separator, rectifying column, rectifying column and gas-liquid separator is connect by the first piping connection, the outlet at bottom of rectifying column with 2 efferent duct of carbon, and the top gas phase outlet of rectifying column is connect with overhead condenser.The advantages of the technical solution of the utility model is：95% is more than to the rate of recovery of alkene and alkane, 99% is more than to the rate of recovery of alkane, the rate of recovery is high.
Description
Technical field
The utility model is related to the recyclings of chemical industry tail gas, and alkane is recycled from olefinic polymerization tail gas more particularly to one kind
The device of hydrocarbon, alkene.
Background technology
Ethylene, propylene are important organic chemical industry's base stock, mainly for the production of polyethylene, polypropylene, EP rubbers,
Polyvinyl chloride etc..China Petroleum and Society of Chemical Industry, it is expected that during " 12th Five-Year Plan " and " 13 " Chinese ethylene production capacity increasing
Speed will respectively reach 4.9% and 5.6%, nevertheless, ethylene still cannot be satisfied the demand of Downstream Market, it is contemplated that arrive the year two thousand twenty
The degree of self-sufficiency only has 62.1%.
There are a large amount of cracking gas olefin hydrocarbon apparatus and coal-to-olefin device in the country at present, and polyethylene is produced in olefinic polyreaction
During polyacrylic, in order to maintain the stabilization and discharges material of polyethylene, polypropylene reactor each component, timing is needed to arrange
Part hydrocarbon-rich tail gas is put, significant wastage is caused, this partial tail gas is recycled, the yield of product can be both improved, also keep away
The burning for having exempted from tail gas causes environmental pollution and the waste of resource, can play the good result of energy-saving and emission-reduction.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of efficiency is higher, can be very good from olefinic polymerization tail
The device of alkane, alkene is recycled in gas.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, including：
For oozing the heat exchange that residual air cools to the iso-butane lightness-removing column tower top tail gas in olefinic polymerization tail gas, secondary membrane
Device；
It is logical with the heat exchanger for the first throttle valve to the iso-butane lightness-removing column tower top tail gas throttling after cooling
Piping connection is crossed, the outlet of the first throttle valve is connect with mixer；
Gas-liquid separation is carried out for oozing residual air to the secondary membrane after cooling, the secondary membrane is made to ooze residual air separation outlet
Mutually with the gas-liquid separator of liquid phase, pass through piping connection, the liquid-phase outlet of the gas-liquid separator and second with the heat exchanger
Throttle valve connects, and the outlet of the second throttle is connect with mixer, and the outlet of the mixer is connect with 4 efferent duct of carbon；
Rectifying column for oozing the gas phase rectifying that residual air is isolated to secondary membrane, the rectifying column and the gas-liquid separator
Gaseous phase outlet by the first piping connection, the outlet at bottom of the rectifying column is connect with 2 efferent duct of carbon, the top of the rectifying column
Portion's gaseous phase outlet is connect with overhead condenser, the gaseous phase outlet of the overhead condenser and the second piping connection.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein 4 efferent duct of the carbon passes through
The heat exchanger is crossed, so that 4 rewarming of carbon in 4 efferent duct of carbon.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein first pipeline passes through
Heat exchanger, so that the cooled cooling of gas phase that the gas-liquid separator separates go out.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein 2 efferent duct of the carbon passes through
It crosses after third throttle valve by the heat exchanger, so that rewarming after 2 reducing pressure by regulating flow of carbon in 2 efferent duct of the carbon.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein second pipeline passes through
With for making the entrance of the expanding machine of gas expansion cooling in the second pipeline connect after heat exchanger, the outlet of the expanding machine connects
First nitrogen efferent duct, the first nitrogen efferent duct passes through heat exchanger, so that the nitrogen in the first nitrogen efferent duct is
The heat exchanger provides cold.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein the outlet of the expanding machine
The second nitrogen efferent duct is connected, the second nitrogen efferent duct connects torch assembly after heat exchanger, so that second nitrogen
Torch assembly is inputted after nitrogen rewarming in gas efferent duct.
The advantages of the technical solution of the utility model is：95% is more than to the rate of recovery of alkene and alkane, alkane is returned
Yield is more than 99%, and the rate of recovery is high；The product yield of the technical solution of the utility model acquisition is big, purity is high, energy conservation and environmental protection, greatly
Unnecessary waste is avoided greatly.
Description of the drawings
Fig. 1 be the utility model from olefinic polymerization tail gas recycle alkane, alkene device structural schematic diagram.
Specific implementation mode
As shown in Figure 1, the device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, including：
For oozing the heat exchange that residual air cools to the iso-butane lightness-removing column tower top tail gas in olefinic polymerization tail gas, secondary membrane
Device E1；
For the first throttle valve VZ1 to the iso-butane lightness-removing column tower top tail gas throttling after cooling, with heat exchanger E1
By piping connection, the outlet of first throttle valve is connect with mixer CM1；
For to the secondary membrane after cooling ooze residual air carry out gas-liquid separation, make secondary membrane ooze residual air isolate gas phase and
The gas-liquid separator V1 of liquid phase passes through piping connection, the liquid-phase outlet and second throttle of gas-liquid separator V1 with heat exchanger E1
The outlet of VZ2 connections, second throttle VZ2 is connect with mixer CM1, and the outlet of mixer is connect with 4 efferent duct of carbon；
Rectifying column T1 for oozing the gas phase rectifying that residual air is isolated to secondary membrane, the gas phase of rectifying column and gas-liquid separator
Outlet is connect by the first piping connection, the outlet at bottom of rectifying column with 2 efferent duct of carbon, the top gas phase outlet of rectifying column and tower
Push up condenser E2 connections, the gaseous phase outlet of overhead condenser and the second piping connection.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein 4 efferent duct of carbon is by changing
Hot device, so that 4 rewarming of carbon in 4 efferent duct of carbon.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein the first pipeline is by heat exchange
Device, so that the cooled cooling of gas phase that gas-liquid separator separates go out.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein 2 efferent duct of carbon is by the
By heat exchanger E1 after three throttle valve VZ3, so that rewarming after 2 reducing pressure by regulating flow of carbon in 2 efferent duct of carbon.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein the second pipeline is by heat exchange
With for making the entrance of expanding machine ET1 that gas expansion in the second pipeline cools down connect after device, the outlet of expanding machine ET1 connects the
One nitrogen efferent duct, the first nitrogen efferent duct passes through heat exchanger, so that the nitrogen in the first nitrogen efferent duct provides for heat exchanger
Cold.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein the outlet of expanding machine ET1
The second nitrogen efferent duct is connected, the second nitrogen efferent duct connects torch assembly after heat exchanger, so that the second nitrogen efferent duct
Torch assembly is inputted after interior nitrogen rewarming.
The utility model from olefinic polymerization tail gas recycle alkane, alkene device other embodiment in, the first nitrogen
Gas efferent duct or the second nitrogen efferent duct pass through overhead condenser E2, so that in the first nitrogen efferent duct or the second nitrogen efferent duct
Nitrogen provide cold for overhead condenser E2.
The advantages of the technical solution of the utility model is：95% is more than to the rate of recovery of alkene and alkane, alkane is returned
Yield is more than 99%, and the rate of recovery is high；The product yield of the technical solution of the utility model acquisition is big, purity is high, energy conservation and environmental protection, greatly
Unnecessary waste is avoided greatly.
The technical solution of the utility model is the device of recycling alkane, alkene in a kind of slave tail gas with rectifying.Polyolefin
Tail gas in device enters the present apparatus, and by condensation cooling, cryogenic rectification, alkane, alkene and torch in tail gas is separately recovered
Gas.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model is utilized without additional refrigeration equipment
The pressure itself of tail gas carries out swell refrigeration, and technological process is reliable and stable, is a kind of typical energy-saving environmental protection device.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein expanding machine is pressurization gas
Bearing expanding machine or gas bearing expanding machine.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein alkane includes C1~C6 groups
Point, alkene includes C2~C6 components.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein heat exchanger changes for plate-fin
Hot device.
The device that alkane, alkene are recycled from olefinic polymerization tail gas of the utility model, wherein rectifying column is plate column,
The number of plates is 1-30 blocks.
The utility model from olefinic polymerization tail gas recycle alkane, alkene device, wherein rectifying column tower top cold by
Expanding machine provides.
Olefinic polymerization tail gas is mainly that x-5002 secondary membranes ooze residual air and c-5002 iso-butane lightness-removing column tower top tail gas, also may be used
Think the combination of any of the above material.
It is nitrogen that x-5002 secondary membranes, which ooze main component in residual air,.
Main component is ethylene, iso-butane and ethane in c-5002 iso-butane lightness-removing column tower top tail gas.
Utilize being carried out in olefinic polymerization tail gas from the device for recycling alkane, alkene in olefinic polymerization tail gas for the utility model
It is as follows to recycle alkane, the embodiment of alkene：
C-5002 iso-butane lightness-removing column tower top tail gas is cooled to -60 DEG C through heat exchanger E1, through first throttle valve VZ1 throttling drops
After pressure, alkane and the material after second throttle VZ2 throttlings of liquid phase converge, and the cooling box after heat exchanger E1 rewarmings obtains
Alkane product.
Tail gas after x-5002 seperation film films cools by heat exchanger E1 to -55 DEG C, is detached through gas-liquid separator V1
Afterwards, the alkane product of liquid phase converges with the material after first throttle valve VZ1 throttlings, and gas phase enters essence after heat exchanger E1 coolings
Tower T1 is evaporated, the olefin product of liquid phase is after third throttle valve VZ3 reducing pressure by regulating flow, the cooling box after heat exchanger E1 rewarmings, obtains
Olefin product.Gas phase is after overhead condenser E2 condensations, and liquid-phase reflux to rectifying column T1, gas phase passes through heat exchanger E1 rewarmings, so
It is divided into two strands after entering expanding machine ET1 expansion coolings afterwards, one provides cold, another stock-traders' know-how heat exchanger E1 to overhead condenser E2
After rewarming, torch assembly is removed.The energy that expanding machine ET1 pressurized ends generate can be used for being pressurized to product.
Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, it can also make several improvements and retouch, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (6)
1. recycling the device of alkane, alkene in a kind of tail gas from olefinic polymerization, which is characterized in that including：
For oozing the heat exchanger that residual air cools to the iso-butane lightness-removing column tower top tail gas in olefinic polymerization tail gas, secondary membrane；
For the first throttle valve to the iso-butane lightness-removing column tower top tail gas throttling after cooling, pass through pipe with the heat exchanger
Road connects, and the outlet of the first throttle valve is connect with mixer；
For to the secondary membrane after cooling ooze residual air carry out gas-liquid separation, make the secondary membrane ooze residual air isolate gas phase and
The gas-liquid separator of liquid phase passes through piping connection, the liquid-phase outlet of the gas-liquid separator and the second throttling with the heat exchanger
Valve connects, and the outlet of the second throttle is connect with mixer, and the outlet of the mixer is connect with 4 efferent duct of carbon；
Rectifying column for oozing the gas phase rectifying that residual air is isolated to secondary membrane, the gas of the rectifying column and the gas-liquid separator
Mutually outlet is connect by the first piping connection, the outlet at bottom of the rectifying column with 2 efferent duct of carbon, the top gas of the rectifying column
Mutually outlet is connect with overhead condenser, the gaseous phase outlet of the overhead condenser and the second piping connection.
2. the device of alkane, alkene is recycled from olefinic polymerization tail gas as described in claim 1, which is characterized in that the carbon 4
Efferent duct passes through the heat exchanger, so that 4 rewarming of carbon in 4 efferent duct of carbon.
3. the device of alkane, alkene is recycled from olefinic polymerization tail gas as claimed in claim 2, which is characterized in that described the
One pipeline passes through heat exchanger, so that the cooled cooling of gas phase that the gas-liquid separator separates go out.
4. the device of alkane, alkene is recycled from olefinic polymerization tail gas as claimed in claim 3, which is characterized in that the carbon 2
Efferent duct after third throttle valve by the heat exchanger so that rewarming after 2 reducing pressure by regulating flow of carbon in 2 efferent duct of the carbon.
5. the device of alkane, alkene is recycled from olefinic polymerization tail gas as claimed in claim 4, which is characterized in that described the
Two pipelines are connect after heat exchanger with being used to make the entrance of the expanding machine of gas expansion cooling in the second pipeline, the expanding machine
Outlet connect the first nitrogen efferent duct, the first nitrogen efferent duct pass through heat exchanger so that the first nitrogen efferent duct
Interior nitrogen provides cold for the heat exchanger.
6. the device of alkane, alkene is recycled from olefinic polymerization tail gas as claimed in claim 5, which is characterized in that described swollen
The outlet of swollen machine connects the second nitrogen efferent duct, and the second nitrogen efferent duct connects torch assembly after heat exchanger, so that
Torch assembly is inputted after nitrogen rewarming in the second nitrogen efferent duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721703694.0U CN207646094U (en) | 2017-12-10 | 2017-12-10 | The device of alkane, alkene is recycled from olefinic polymerization tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721703694.0U CN207646094U (en) | 2017-12-10 | 2017-12-10 | The device of alkane, alkene is recycled from olefinic polymerization tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207646094U true CN207646094U (en) | 2018-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721703694.0U Withdrawn - After Issue CN207646094U (en) | 2017-12-10 | 2017-12-10 | The device of alkane, alkene is recycled from olefinic polymerization tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207646094U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879888A (en) * | 2017-12-10 | 2018-04-06 | 中科瑞奥能源科技股份有限公司 | Alkane, the technique and device of alkene are reclaimed from olefinic polymerization tail gas |
-
2017
- 2017-12-10 CN CN201721703694.0U patent/CN207646094U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879888A (en) * | 2017-12-10 | 2018-04-06 | 中科瑞奥能源科技股份有限公司 | Alkane, the technique and device of alkene are reclaimed from olefinic polymerization tail gas |
| CN107879888B (en) * | 2017-12-10 | 2022-09-27 | 中科瑞奥能源科技股份有限公司 | Process and device for recovering alkane and olefin from olefin polymerization tail gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180724 Effective date of abandoning: 20220927 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180724 Effective date of abandoning: 20220927 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |