CN202936339U - Production system for polyvinyl alcohol aqueous solution - Google Patents
Production system for polyvinyl alcohol aqueous solution Download PDFInfo
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- CN202936339U CN202936339U CN 201220557010 CN201220557010U CN202936339U CN 202936339 U CN202936339 U CN 202936339U CN 201220557010 CN201220557010 CN 201220557010 CN 201220557010 U CN201220557010 U CN 201220557010U CN 202936339 U CN202936339 U CN 202936339U
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- condenser
- alcoholysis
- valve
- polyvinyl alcohol
- production system
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Abstract
A production system for a polyvinyl alcohol aqueous solution comprises a polymerization kettle 1, a condenser 2a, a zeotropic fluid bath 4a, an alcoholysis kettle 3, a condenser 2b and a zeotropic fluid bath 4b, wherein the condenser 2a is directly connected with the polymerization kettle; the zeotropic fluid bath 4a is directly connected with an outlet of the condenser 2a through a pipeline controlled by a valve 5; the condenser 2b is directly connected with the alcoholysis kettle 3; the zeotropic fluid bath 4b is directly connected with an outlet of the condenser 2b through a pipeline controlled by a valve 7; the polymerization kettle 1 is directly connected with the alcoholysis kettle 3; the outlet of the condenser 2a is connected with an inlet of the polymerization kettle 1 through a pipeline controlled by a valve 6 to form a closed circuit; and the outlet of the condenser 2b is directly connected with an inlet of the alcoholysis kettle 3 through a pipeline controlled by a valve 8 to form a closed circuit. The polyvinyl alcohol aqueous solution is prepared by the production system, so that the integration of the polymerization and the residual monomer separation is realized; and meanwhile, the solvent displacement is carried out after the alcoholysis is finished. The production system has the advantages that the production process is simplified greatly, and the energy consumption is reduced remarkably.
Description
Technical field
The utility model relates to the production system of high molecular polymer, is specifically related to a kind of production system of polyvinyl alcohol water solution.
Background technology
At present, the production system that adopts solution polymerization process to produce polyvinyl alcohol water solution mainly comprises the equipment such as polymeric kettle, stripping tower, residual single receiving tank, PVAC storage tank, alcoholysis system (alcoholysis mixing machine or alcoholysis kneader, belt alcoholysis machine or screw extrusion press), pulverizer, expression separation device, moisture eliminator and dissolver, concrete production is the raw material that reaction monomers, initiator etc. prepares to be added carry out copolyreaction in polymeric kettle, polymerisate is sent into stripping tower, is carried out in stripping tower residual single the separation, and residual monomer enters residual single receiving tank and reclaims; Polymerisate is squeezed into the alcoholysis still again and is carried out alcoholysis reaction and obtain product after residual single the separation, product after alcoholysis is installed polyvinyl alcohol product and separated from solvent purifying through pulverizing, expression separation, drying etc., and then the concentration of the required polyvinyl alcohol water solution of allotment makes required polyvinyl alcohol water solution product in dissolver.As seen, existing polyvinyl alcohol water solution production system equipment is more, complex procedures, and energy consumption is larger.
The utility model content
The purpose of this utility model is to provide a kind of easy, efficient polyvinyl alcohol water solution production system.
The purpose of this utility model is achieved in that
A kind of production system of polyvinyl alcohol water solution, it is characterized in that: the azeotropic liquid bath that the condenser that it comprises polymeric kettle, directly be connected with polymeric kettle, pipeline and the condensator outlet controlled by valve directly are connected, and another azeotropic liquid bath of directly being connected of alcoholysis still, another condenser that directly is connected with the alcoholysis still, pipeline and another condensator outlet of controlling by valve, described polymeric kettle directly is connected with the alcoholysis still; Wherein the pipeline also controlled by valve of condensator outlet is connected with the polymeric kettle import and forms the loop line, the pipeline that another condensator outlet is also controlled by valve and the import of alcoholysis still directly be connected formation loop line.
In above-mentioned polymerization reaction system, by isolate the pipeline of two band valves after condenser, a pipeline returns polymeric kettle by condenser, and a pipeline arrives the azeotropic liquid bath by condenser, turn off another path during polymerization and get back to polymeric kettle by phlegma, realize the recycle of residual monomer; When polymerization finishes, turn off back the path of polymeric kettle, open back the path of azeotropic liquid, residual monomer is collected in the azeotropic liquid bath.Carried out allocating concentration after residual single resin (containing solvent) that separates is pumped into the alcoholysis still, carried out alcoholysis, turned off the path of condenser azeotropic last time liquid bath during alcoholysis, realized in alcoholysis reaction the recycle to solvent; When carrying out solvent exchange after alcoholysis finishes, turned off and returned the path of alcoholysis still after the condenser, open back the path of azeotropic liquid bath, the alcoholysis still is heated up, add water in the alcoholysis still, solvent in the azeotropic liquid bath, is realized the displacement of alcoholysis solvent and water in alcoholysis product by condenser, then adds water carry out concentration and be deployed into certain density PVA aqueous products in the alcoholysis still.
The beneficial effects of the utility model are as follows:
Use the production system of the utility model polyvinyl alcohol water solution to prepare polyvinyl alcohol water solution, realized polymerization and residual single integration that separates, equipment and operation have been simplified in the recycle of residual monomer in polymerization process; Realized simultaneously the recycle of solvent in alcoholysis process, directly carried out solvent exchange after alcoholysis is completed, obtained the polyvinyl alcohol water solution product, the utility model production system has been simplified Production Flow Chart greatly, has significantly reduced material consumption, energy consumption.
Description of drawings
Fig. 1: the structural representation of the utility model polyvinyl alcohol water solution production system.In Fig. 1, polymeric kettle 1, condenser 2a, condenser 2b, alcoholysis still 3, azeotropic liquid bath 4a, azeotropic liquid bath 4b, valve 5, valve 6, valve 7, valve 8.
Embodiment
Below by embodiment, the present invention is specifically described; be necessary to be pointed out that at this; following examples only are used for the present invention is further detailed; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the foregoing invention content.
Embodiment 1
A kind of production system of polyvinyl alcohol water solution, the condenser 2a that it comprises polymeric kettle 1, directly be connected with polymeric kettle 1 top outlet, pipeline and condenser 2a by valve 5 controls export the azeotropic liquid bath 4a that directly is connected, and alcoholysis still 3, the condenser 2b that directly is connected with the 3 tops outlets of alcoholysis still, pipeline and condenser 2b by valve 7 controls export the azeotropic liquid bath 4b that directly is connected, and described polymeric kettle 1 outlet at bottom directly is connected with alcoholysis still 3 upper inlet; Wherein the pipeline also controlled by valve 6 of condenser 2a outlet is connected with polymeric kettle 1 upper inlet and forms the loop line, the pipeline that condenser 2b outlet is also controlled by valve 8 and alcoholysis still 3 upper inlet directly be connected formation loop lines.
In above-mentioned polymerization reaction system, by isolate the pipeline of two band valves after condenser, a pipeline returns polymeric kettle by condenser, and a pipeline arrives the azeotropic liquid bath by condenser, turn off another path during polymerization and get back to polymeric kettle by phlegma, realize the recycle of residual monomer; When polymerization finishes, turn off back the path of polymeric kettle, open back the path of azeotropic liquid, residual monomer is collected in the azeotropic liquid bath.Carried out carrying out alcoholysis after residual single resin (containing solvent) that separates is pumped into the alcoholysis still, allotment concentration is turned off the path of condenser azeotropic last time liquid bath during alcoholysis, realizes in alcoholysis reaction the recycle to solvent; When carrying out solvent exchange after alcoholysis finishes, turned off and returned the path of alcoholysis still after the condenser, open back the path of azeotropic liquid bath, the alcoholysis still is heated up, add water in the alcoholysis still, solvent in the azeotropic liquid bath, is realized the displacement of alcoholysis solvent and water in alcoholysis product by condenser, then adds water carry out the polyvinyl alcohol water solution product that concentration is deployed into needs in the alcoholysis still.
Claims (1)
1. the production system of a polyvinyl alcohol water solution, it is characterized in that: it comprises polymeric kettle (1), the condenser (2a) that directly is connected with polymeric kettle (1), the pipeline of controlling by valve (5) export with condenser (2a) the azeotropic liquid bath (4a) that directly is connected, and alcoholysis still (3), the condenser (2b) that directly is connected with alcoholysis still (3), the pipeline controlled by valve (7) export with condenser (2b) the azeotropic liquid bath (4b) that directly is connected, and described polymeric kettle (1) directly is connected with alcoholysis still (3); Wherein the pipeline also controlled by valve (6) of condenser (2a) outlet is connected with polymeric kettle (1) import and forms the loop line, and condenser (2b) outlet is directly be connected formation loop line of the pipeline by valve (8) control and alcoholysis still (3) import also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557010 CN202936339U (en) | 2012-10-26 | 2012-10-26 | Production system for polyvinyl alcohol aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557010 CN202936339U (en) | 2012-10-26 | 2012-10-26 | Production system for polyvinyl alcohol aqueous solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202936339U true CN202936339U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220557010 Expired - Lifetime CN202936339U (en) | 2012-10-26 | 2012-10-26 | Production system for polyvinyl alcohol aqueous solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202936339U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106084099A (en) * | 2016-08-17 | 2016-11-09 | 中国石化长城能源化工（宁夏）有限公司 | A kind of effective system reducing polymerization energy consumption of rectification and improving operational stability |
-
2012
- 2012-10-26 CN CN 201220557010 patent/CN202936339U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106084099A (en) * | 2016-08-17 | 2016-11-09 | 中国石化长城能源化工（宁夏）有限公司 | A kind of effective system reducing polymerization energy consumption of rectification and improving operational stability |
| CN106084099B (en) * | 2016-08-17 | 2018-09-04 | 中国石化长城能源化工（宁夏）有限公司 | A kind of effective system and device for reducing polymerization energy consumption of rectification and improving operational stability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |