CN101590363A - The method of polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production - Google Patents
The method of polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production Download PDFInfo
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- CN101590363A CN101590363A CNA200810100093XA CN200810100093A CN101590363A CN 101590363 A CN101590363 A CN 101590363A CN A200810100093X A CNA200810100093X A CN A200810100093XA CN 200810100093 A CN200810100093 A CN 200810100093A CN 101590363 A CN101590363 A CN 101590363A
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Abstract
The present invention relates to the method for polymerization stripping tower tail gas alkaline cleaning in a kind of polyvinyl chloride resin production, comprised gas-liquid separator, caustic wash tower, two alkali jars of linking to each other successively, between alkali jar and caustic wash tower, be provided with two alkali pumps; Come the tail gas of auto polymerization stripping tower to enter in the gas-liquid separator, carry out gas-liquid separation in gas-liquid separator, the liquid part is discharged from gas-liquid separator; The recovery gas that produces enters caustic wash tower, removes the impurity that reclaims in the gas and finish alkali cleaning in caustic wash tower, and the recovery gas after the alkali cleaning will be recovered once more and utilize; The liquid phase alkali lye that comes out from caustic wash tower is then got back to the alkali jar and is carried out recycling.The invention solves in the present Corvic industry production gas in the polymerization process is put forward the problem that tail gas is difficult to recycle, have having a few of little, the easy enforcement of investment, technology advantages of simple, and can reach the environmental protection purpose of energy-saving and emission-reduction.Be applied in the technology of Production of PVC, particularly the method for polymerization stripper vent gas treatment.
Description
Affiliated technical field:
The present invention relates to a kind of recycling of stripper tail gas and the processing method of reduce polluting, particularly for the method for polymerization stripper tail gas alkaline cleaning in the polyvinyl chloride resin production.
Background technology:
The production technology of Corvic is ripe already, but the processing for polymerization stripping operation stripper tail gas is a difficult problem always in the traditional handicraft.On the one hand owing to exist in the tail gas and participate in the VCM of reaction and directly discharged, so this part monomer is not used usually, caused environmental pollution and increased production cost; On the other hand also because contain alkane, rare hydrocarbon, alkynes, lipid, alcohols, aldehydes in the tail gas and other contains materials such as free radical, these impurity can cause the monomer autohemagglutination and blocking pipe and equipment usually, so in actual production, these impurity must be removed, to guarantee to produce normally the carrying out of safety; Therefore at present the domestic method of taking directly discharging is not recycled it with the continuity that guarantees to produce and security reliability more.
Summary of the invention:
Cause environmental pollution and produce high problem thereby the invention reside in to have solved in the present Corvic industry production stripping tail gas in the polymerization process is difficult to recycle, and then provide a kind of and can improve the VCM utilization rate, reduce production costs; Reduce and eliminate obstruction, corrode and enhance productivity equipment pipe and a kind of Production of PVC of security reliability in polymerization stripper tail gas alkaline cleaning technology.
The technical solution used in the present invention is: the method for polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production of the present invention, comprise gas-liquid separator, caustic wash tower, two alkali jars of linking to each other successively, and between alkali jar and caustic wash tower, be provided with two alkali pumps; Come the tail gas of auto polymerization stripper to enter in the gas-liquid separator, carry out gas-liquid separation in gas-liquid separator, the liquid part is discharged from gas-liquid separator; The recovery gas that produces enters caustic wash tower, and alkali lye enters into porous tubular type liquid distribution trough in the tower by the inlet at caustic wash tower top in caustic wash tower, and this structure helps alkali lye and distributes uniformly in caustic wash tower, thereby guarantees that alkali lye can fully contact with tail gas; Alkali lye is by porous tubular type liquid distribution trough even distribution alkali lye in tower then; Reclaim gas and then entered in the tower by the air inlet pipe of caustic wash tower bottom, and fully mix the impurity that removes in the recovery gas with alkali lye and finish alkali cleaning in inner-tower filling material, the recovery gas after the alkali cleaning will be recovered once more and utilize; The liquid phase alkali lye that comes out from caustic wash tower is then got back to the alkali jar and is carried out recycling.
The method of polymerization stripper tail gas alkaline cleaning in described a kind of polyvinyl chloride resin production, two alkali jars are respectively concentrated base jar and former diluted alkaline jar, and two pumps are respectively alkali pump a and alkali pump b.Qualified alkali lye in the former aborning diluted alkaline jar will be sent in the caustic wash tower by alkali pump b tail gas will be carried out alkali cleaning, and the alkali lye of being discharged by the caustic wash tower bottom after alkali cleaning is finished is then sent into the cycling and reutilization that carries out alkali lye in the concentrated base jar by alkali pump a; Concentrated base jar and former diluted alkaline jar also can reach the effect of regulating concentration of lye and liquid level in addition.Thereby owing to adopted the device of above setting can effectively reach the purpose of tail gas alkaline cleaning.
The method of polymerization stripper tail gas alkaline cleaning in described a kind of polyvinyl chloride resin production, the alkali cleaning inner-tower filling material is a Raschig ring, and liquid distribution trough is a porous tubular type liquid distribution trough, and the liquid distribution trough of this structure helps the alkali lye interior even distribution of caustic wash tower again; Adopt the filler of plum blossom ring structure then can effectively guarantee the abundant contact of alkali lye, further improve the removal efficiency of impurity in the tail gas in tail gas.To sum up adopt the liquid distribution trough and the filler of said structure can further improve the effect of alkali cleaning.
The method of polymerization stripper tail gas alkaline cleaning in described a kind of polyvinyl chloride resin production reclaims impurity in the gas and is alkane, rare hydrocarbon, alkynes, lipid, alcohols, aldehydes and other contains the free radical material.
The present invention recycles directly discharge tail gas on the one hand by setting up alkali washing process at original polymerization process, and then reaches and reduced production cost, has improved economic benefit.The alkane in the tail gas, rare hydrocarbon, alkynes, lipid, alcohols, aldehydes when reclaiming the tail gas process, have been removed on the other hand and other contains materials such as free radical, eliminated the pipe-line equipment that causes owing to autohemagglutination and blocked, thus the purpose that reaches environmental protection and further enhance productivity.The present invention finally can make the tail gas zero-emission, thereby has solved for a long time the difficult problem to stripper vent gas treatment in the Production of PVC.In addition owing to original polymerization technique there be not the shortcoming of reclaiming system carried out perfect, increase that the gas-liquid separation of stripping tower tail gas, alkali cleaning and reclaiming system are had the equipment of increase is few, invest little, easily implement and the advantage of technology advantages of simple, can effectively reach the environmental protection purpose of energy-saving and emission-reduction.Especially two alkali jars that are to be provided with can caustic wash tower is used alkali lye carry out effective cycling and reutilization, and then further reduced production cost, improved production efficiency.The present invention can be widely used in the technology of Production of PVC, particularly the method for polymerization stripping tower vent gas treatment.
Description of drawings:
Fig. 1 is the process chart of the embodiment of the invention;
1 is gas-liquid separator among Fig. 1; 2 is the concentrated base jar; 3 is former diluted alkaline jar; 4 is alkali pump a; 5 is alkali pump b; 6 is caustic wash tower.
Specific embodiments:
With reference to accompanying drawing 1, present embodiment comprises gas-liquid separator 1, concentrated base jar 2, former diluted alkaline jar 3, the alkali pump a that links to each other successively; Alkali pump b, caustic wash tower 6; Above-mentioned caustic wash tower tower body top, horizontal is provided with a porous tubular type liquid distribution trough, is evenly distributed with the separatory hole on the liquid distribution trough surface, and this structure can be distributed in alkali lye in the caustic wash tower uniformly; In the caustic wash tower middle and upper part filler is housed, filler is a Raschig ring, adopts this filler that tail gas can fully be contacted with alkali lye, and then reaches the purpose of removing impurity in the tail gas.Alkali lye enters from caustic wash tower top inlet, and tail gas is entered by caustic wash tower bottom inflow pipe.Come the tail gas of auto polymerization stripper will at first be sent to gas-liquid separator and carry out gas-liquid separation; The liquid part is discharged by gas-liquid separator, and the gas phase recovery gas after gas-liquid separation then will be sent to caustic wash tower and carry out alkali cleaning; Qualified alkali lye in the diluted alkaline jar of actual production Central Plains will be sent in the caustic wash tower by alkali pump b tail gas will be carried out alkali cleaning, the alkali lye of being discharged by the caustic wash tower bottom after alkali cleaning is finished is then sent into the cycling and reutilization that carries out alkali lye in the concentrated base jar by alkali pump a, if when alkali lye is not enough to use for caustic wash tower in the former diluted alkaline jar, at this moment also can extract in the concentrated base jar alkali lye to satisfy the needs of caustic wash tower tail gas alkaline cleaning by alkali pump b; Recovery gas after last alkali cleaning is finished directly is sent to the vinyl chloride gas holder and recycles, thereby can effectively reach the purpose of tail gas alkaline cleaning; Simultaneously, further reduced production cost because the setting of two alkali jars has also guaranteed the effectively recycling of alkali lye in the actual production.
If when concentration of lye did not reach production requirement, then concentrated base jar and former diluted alkaline jar also can reach the effect of regulating concentration of lye by alkali pump b in addition; When the liquid level of concentrated base jar or former diluted alkaline jar is not enough or too high, then reach the effect of regulating liquid level by alkali pump a.
Another embodiment difference is that filler can be the plum blossom ring in the caustic wash tower, and liquid distribution trough can adopt screen formula liquid distribution trough.
The installation site of another embodiment difference filler in caustic wash tower can be in the caustic wash tower bottom.
Claims (4)
1, the method for polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production; It is characterized in that: comprise gas-liquid separator, caustic wash tower, two alkali jars of linking to each other successively, between alkali jar and caustic wash tower, be provided with two alkali pumps; Come the tail gas of auto polymerization stripper to enter in the gas-liquid separator, carry out gas-liquid separation in gas-liquid separator, the liquid part is discharged from gas-liquid separator; The recovery gas that produces enters caustic wash tower, removes the impurity that reclaims in the gas and finish alkali cleaning in caustic wash tower, and the recovery gas after the alkali cleaning will be recovered once more and utilize; The liquid phase alkali lye that comes out from caustic wash tower is then got back to the alkali jar and is carried out recycling.
2, the method for polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production according to claim 1, it is characterized in that two alkali jars are respectively concentrated base jar and former diluted alkaline jar, two pumps are respectively alkali pump a and alkali pump b, qualified alkali lye in the former aborning diluted alkaline jar is sent in the caustic wash tower by alkali pump b tail gas is carried out alkali cleaning, and the alkali lye of being discharged by the caustic wash tower bottom after alkali cleaning is finished is then sent into the cycling and reutilization that carries out alkali lye in the concentrated base jar by alkali pump a.
3, the method for polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production according to claim 1 and 2 is characterized in that liquid distribution trough is a porous tubular type liquid distribution trough in caustic wash tower, and filler is a Raschig ring.
4, the method for polymerization stripper tail gas alkaline cleaning in a kind of polyvinyl chloride resin production according to claim 3 is characterized in that reclaiming impurity in the gas and is alkane, rare hydrocarbon, alkynes, lipid, alcohols, aldehydes and contains the free radical material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810100093XA CN101590363B (en) | 2008-06-01 | 2008-06-01 | Method of tail gas alkaline cleaning in a polymerization stripping tower in polyvinyl chloride (PVC) resin production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810100093XA CN101590363B (en) | 2008-06-01 | 2008-06-01 | Method of tail gas alkaline cleaning in a polymerization stripping tower in polyvinyl chloride (PVC) resin production |
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| Publication Number | Publication Date |
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| CN101590363A true CN101590363A (en) | 2009-12-02 |
| CN101590363B CN101590363B (en) | 2011-08-17 |
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| CN200810100093XA Active CN101590363B (en) | 2008-06-01 | 2008-06-01 | Method of tail gas alkaline cleaning in a polymerization stripping tower in polyvinyl chloride (PVC) resin production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527215A (en) * | 2011-12-27 | 2012-07-04 | 安徽皖维高新材料股份有限公司 | Method for recycling ethylene gas from tail gas and water alkaline washing tower thereof |
| CN103412486A (en) * | 2013-07-23 | 2013-11-27 | 沈阳化工大学 | Intelligent control method for polyvinyl chloride steam stripping process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103366U (en) * | 1991-09-18 | 1992-05-06 | 沈阳市铁西区环境科学研究所 | Device for treating waste gas |
| CN1239680C (en) * | 2003-11-20 | 2006-02-01 | 北京欣博通创新能源技术开发有限公司 | Process for olefin removal from refinery gas |
| CN100464820C (en) * | 2006-03-13 | 2009-03-04 | 董谊仁 | Gas-purifying combined absorbing tower and application thereof |
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2008
- 2008-06-01 CN CN200810100093XA patent/CN101590363B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527215A (en) * | 2011-12-27 | 2012-07-04 | 安徽皖维高新材料股份有限公司 | Method for recycling ethylene gas from tail gas and water alkaline washing tower thereof |
| CN102527215B (en) * | 2011-12-27 | 2014-03-19 | 安徽皖维高新材料股份有限公司 | Method for recycling ethylene gas from tail gas and water alkaline washing tower thereof |
| CN103412486A (en) * | 2013-07-23 | 2013-11-27 | 沈阳化工大学 | Intelligent control method for polyvinyl chloride steam stripping process |
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| CN101590363B (en) | 2011-08-17 |
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Owner name: TIANCHENG CHEMICAL CO., LTD. Free format text: FORMER OWNER: XINJIANG TIANYE(GROUP) CO., LTD. Effective date: 20111026 |
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Effective date of registration: 20111026 Address after: 832012, No. 36, North East Road, Shihezi Development Zone, the Xinjiang Uygur Autonomous Region Patentee after: Tianchen Chemical Co., Ltd. Address before: The North economic and Technological Development Zone Shihezi city the Xinjiang Uygur Autonomous Region road 832000 No. 36 Patentee before: Xinjiang Tianye (Group) Co., Ltd. |
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Effective date of registration: 20180402 Address after: No. 36 North Third East Road, Xinjiang Shihezi Development Zone, Xinjiang Co-patentee after: Xinjiang Tianye (Group) Co., Ltd. Patentee after: Tianchen Chemical Co., Ltd. Address before: 832012, No. 36, North East Road, Shihezi Development Zone, the Xinjiang Uygur Autonomous Region Patentee before: Tianchen Chemical Co., Ltd. |