CN220194018U - Polyvinyl alcohol and post-treatment device for modified polymer thereof - Google Patents
Polyvinyl alcohol and post-treatment device for modified polymer thereof Download PDFInfo
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- CN220194018U CN220194018U CN202321748855.3U CN202321748855U CN220194018U CN 220194018 U CN220194018 U CN 220194018U CN 202321748855 U CN202321748855 U CN 202321748855U CN 220194018 U CN220194018 U CN 220194018U
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- Prior art keywords
- discharging pipeline
- polymer
- pipeline
- washing
- washing kettle
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- 229920000642 polymer Polymers 0.000 title claims abstract description 41
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 67
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 36
- 239000002904 solvent Substances 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 10
- 239000002910 solid waste Substances 0.000 claims abstract description 5
- 230000002572 peristaltic effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 8
- 238000001035 drying Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The utility model provides a post-treatment device for polyvinyl alcohol and modified polymers thereof, and belongs to the technical field of polymer purification devices. The device comprises a washing kettle, wherein a polymerization liquid feeding pipeline, a solvent feeding pipeline, a polymer discharging pipeline and a liquid discharging pipeline are arranged on the washing kettle; the rectifying tower is provided with a solid waste discharging pipeline and a rectifying gas discharging pipeline, and is connected with the washing kettle through a liquid discharging pipeline; the first condensing tank is connected with the washing kettle and the rectifying tower through a solvent feeding pipeline and a rectifying gas discharging pipeline respectively; the solid-liquid separation net is arranged inside the washing kettle and is positioned at the lower end of the pipe orifice of the polymer discharging pipeline. The post-treatment device provided by the utility model can effectively remove salt impurities in the polymer, has less consumption of washing solvent and less occupied space, and is more environment-friendly.
Description
Technical Field
The utility model belongs to the technical field of polymer purification devices, and particularly relates to a post-treatment device for polyvinyl alcohol and modified polymers thereof.
Background
The high polymer is mainly prepared by polymerization, precipitation, washing, drying and granulation molding. At present, most polymers are generally washed by repeatedly washing the solid with a solvent after the solid is precipitated. The washing mode of polyvinyl alcohol and its modified polymer (such as polyvinyl alcohol (PVA), polyvinyl formal (PVF), polyvinyl butyral (PVB), ethylene-vinyl alcohol copolymer (EVOH)) is mainly that after polymerization is completed, the catalyst is cooled down, precipitated out, and the catalyst is remained or some salt by-products are obtained in the process, and then the washing is carried out by using solvent. The washing of the stock slurry is typically accomplished in a discontinuous wash tank, which is time consuming, space consuming, and can also produce a significant amount of wash waste, polluting the environment.
Disclosure of Invention
In view of the above, the utility model provides a post-treatment device for polyvinyl alcohol and modified polymers thereof, which can effectively remove impurities from the polyvinyl alcohol and the modified polymers thereof, has less consumption of detergents and is more environment-friendly.
In order to achieve the above object, the present utility model provides a post-treatment device for polyvinyl alcohol and its modified polymer, comprising:
the washing kettle is provided with a polymerization liquid feeding pipeline, a solvent feeding pipeline, a polymer discharging pipeline and a liquid discharging pipeline;
the rectifying tower is provided with a solid waste discharging pipeline and a rectifying gas discharging pipeline, and is connected with the washing kettle through a liquid discharging pipeline;
the first condensing tank is connected with the washing kettle and the rectifying tower through a solvent feeding pipeline and a rectifying gas discharging pipeline respectively;
the solid-liquid separation net is arranged inside the washing kettle and is positioned at the lower end of the pipe orifice of the polymer discharging pipeline.
Preferably, the washing device also comprises an air compressor which is connected with the washing kettle through a gas input pipeline.
Preferably, a temperature control system is further arranged on the washing kettle and used for regulating and controlling the temperature in the washing kettle.
Preferably, the device further comprises a second condensing tank, wherein the second condensing tank is connected with the washing kettle through a gas output pipeline, and a gas outlet and a condensate discharging pipeline are arranged on the second condensing tank.
Preferably, the washing machine further comprises a stirrer arranged inside the washing kettle.
Preferably, the peristaltic pump is arranged on the liquid discharging pipeline.
Preferably, the pressure gauge is communicated with the washing kettle and is used for measuring the pressure in the washing kettle.
Preferably, the top of the washing kettle is of a detachable structure.
Preferably, the reactor further comprises a polymer collecting tower connected with the washing kettle through a polymer discharging pipeline.
Preferably, valves are provided on each connecting line.
Compared with the prior art, the utility model has the advantages and positive effects that:
the post-treatment device for the polyvinyl alcohol and the modified polymer thereof provided by the utility model comprises a washing kettle, a rectifying tower, a first condensing tank and a solid-liquid separation net, and is connected through pipelines to form a circulating system, so that the removal effect of salt byproducts is good, no solvent is leaked, the environment is protected, the recycling of the solvent is realized, and the solvent, the space and the production time are saved; and arranging a solid-liquid separation net to directly separate the solvent from the product.
Furthermore, through setting up air compressor and temperature control system with the cauldron UNICOM, not only adjustable solid-liquid separation speed, can also collect solid-liquid separation, washing, drying in a body in the cauldron, a cauldron is multi-purpose, saves equipment cost, occupation of land space, and convenient operation.
Further, through setting up the second condenser, can collect the little solvent that carries in the tail gas when the pressure release, not only reduce the waste of solvent, further improve environmental protection effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic structural view of a post-treatment apparatus for polyvinyl alcohol and its modified polymer according to the present utility model;
wherein: 1-scrubbing still, 2-rectifying column, 3-air compressor, 4-gas input pipeline, 5-polymerization liquid feed line, 6-agitator, 7-solvent feed line, 8-gas output pipeline, 9-first condensing tank, 10-gas outlet, 11-condensate discharge line, 12-polymer discharge line, 13-liquid discharge line, 14-peristaltic pump, 15-second condensing tank, 16-rectification gas discharge line, 17-solid waste discharge line, 18-polymer collecting column, 19-manometer, 20-temperature control system, 21-valve.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present utility model provides a post-treatment apparatus for polyvinyl alcohol and its modified polymer, comprising:
a polymeric liquid feed line 5, a solvent feed line 7, a polymer discharge line 12 and a liquid discharge line 13 are arranged on the washing kettle 1;
the rectifying tower 2 is provided with a solid waste discharging pipeline 17 and a rectifying gas discharging pipeline 16, and is connected with the washing kettle 1 through a liquid discharging pipeline 13;
the first condensing tank 9 is respectively connected with the washing kettle 1 and the rectifying tower 2 through a solvent feeding pipeline 7 and a rectifying gas discharging pipeline 16;
the solid-liquid separation net 18 is arranged inside the washing kettle 1 and is positioned at the lower end of the orifice of the polymer discharging pipeline 12.
During operation, the polymerization liquid and the solvent enter the washing kettle 1 from the polymerization liquid feeding pipeline 5 to start washing, the solid-liquid separation net 18 can effectively intercept the polymer at the upper part of the solid-liquid separation net 18, most of the solvent is separated, the solvent can be directly discharged after washing is finished, washing waste liquid enters the rectifying tower 2 through the liquid discharging pipeline 13, the washing waste liquid enters the rectifying tower 2 and is rectified, the solvent enters the first condensing tank 9 through the rectifying gas discharging pipeline 16 in a gas form to be condensed and collected, the liquid solvent is obtained, the solvent enters the washing kettle 1 again to be recycled, and byproducts such as salts in the polymer are washed cleanly through such recycling. The use amount of the detergent is reduced by recycling the solvent, the raw material cost is reduced, and the environmental pollution is reduced. And the device forms a continuous circulation system, thereby saving production time and occupied space.
Further, in the present utility model, an air compressor 3 is further included, and is connected to the washing tank 1 through a gas input line 4. In the utility model, an air compressor 3 communicated with the washing kettle 1 is arranged, and the pressure in the kettle is regulated and controlled by the air compressor 3, so that the separation rate can be regulated. Meanwhile, after washing is finished, the pressure can be further increased to further squeeze the solid filter cake, so that the wet content is reduced, and the subsequent drying is facilitated.
Further, in the present utility model, a stirrer 6 is provided inside the washing tank 1. In the utility model, the stirrer 6 is arranged to stir in the washing process, so that the solvent and the polymer are further uniformly mixed, and the washing effect is improved.
Further, in the present utility model, a peristaltic pump 14 is further included and is disposed on the liquid discharge line 13. In the present utility model, the peristaltic pump 14 is arranged on the liquid discharging pipeline 13, so that the separated liquid can enter the rectifying tower 2 quickly and efficiently.
Further, in the present utility model, a pressure gauge 19 is further included in communication with the washing tank 1, and in the present utility model, the pressure gauge is provided for measuring the pressure in the washing tank 1.
Further, in the present utility model, the temperature control system 20 is further disposed on the washing kettle 1, and in the present utility model, the polymer can be dried by matching the temperature control system 20 with the air compressor 3, which specifically comprises the following steps: after the washing is finished, the pressure in the washing kettle 1 is further increased through the air compressor 3, the solid filter cake is further extruded, the wet content is reduced, then the gas output pipeline 8 is opened to release the pressure, the temperature control system 20 is opened to adjust the temperature of the washing kettle 1 to the drying temperature for drying, at the moment, the air compressor 3 slowly blows air to bring the solvent out of the washing kettle 1, and the wet content of the washed polymer is further controlled.
Further, in the utility model, the device also comprises a second condensing tank 15 which is connected with the washing kettle 1 through a gas output pipeline 8, and a gas outlet 10 and a condensate discharging pipeline 11 are arranged on the second condensing tank 15. In the utility model, the second condensing tank 15 is arranged, so that the gas exhausted from the washing kettle 1 can be condensed, the solvent is collected, the solvent carried in the tail gas is reduced, and the waste of the solvent is reduced, and meanwhile, the method is more environment-friendly.
Further, in the utility model, the top of the washing kettle 1 is of a detachable structure. In actual production, solid-liquid separation nets with different pore diameters can be selected according to the particle size of the polymer. In the utility model, the top of the washing kettle 1 is provided with a detachable structure, thereby facilitating the detachment and replacement of the solid-liquid separation net.
Further, in the present utility model, a polymer collecting column 18 is further included, which is connected to the washing tank 1 through a polymer discharge line 12. In the present utility model, the collection of the polymer after the completion of the treatment is facilitated by the provision of the polymer collection tower 18.
Further, in the present utility model, for convenience of operation, a valve 21 is provided on each connection line.
The technical solutions provided by the present utility model are described in detail below in conjunction with examples for further illustrating the present utility model, but they should not be construed as limiting the scope of the present utility model.
Example 1
The method comprises the steps of selecting a 300-mesh solid-liquid separation net in a washing kettle, pumping a polyvinyl butyral (PVB) polymerization liquid aqueous solution into the washing kettle 1 through a polymerization liquid feeding pipeline 5, opening a stirrer 6, setting the rotating speed to 300r/min, opening an air compressor 3, keeping the pressure in the kettle to be 0.1-0.2 MPa, adjusting the separation rate, opening a liquid discharging pipeline 13, pumping washing liquid obtained by separating a solid-liquid separation net 18 into a rectifying tower 2 through a peristaltic pump 14, rectifying in the rectifying tower 2, enabling solvent forming gas to enter a condensing tank 9 from a rectifying gas discharging pipeline 16 for condensation collection, enabling the solvent forming gas to enter the washing kettle 1 through a solvent feeding pipeline 7 for recycling, repeating the above processes until PVB is washed completely, closing a valve 21 on the liquid discharging pipeline 13, opening a valve on the gas outputting pipeline 8 and an air outlet 10 on a second condensing tank 15, opening a pressure relief system 20 of the washing kettle 1, setting the heating temperature to be 90 ℃, simultaneously blowing a small amount of air to accelerate the solvent to take the solvent out of the washing kettle 1, enabling PVB to reach a proper moisture content, and finally collecting the solvent, collecting the PVB, and collecting good quality and good salt-like by-products in the PVB collecting tower 18.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. A post-treatment device for polyvinyl alcohol and modified polymer thereof, comprising:
the washing kettle is provided with a polymerization liquid feeding pipeline, a solvent feeding pipeline, a polymer discharging pipeline and a liquid discharging pipeline;
the rectifying tower is provided with a solid waste discharging pipeline and a rectifying gas discharging pipeline, and is connected with the washing kettle through a liquid discharging pipeline;
the first condensing tank is connected with the washing kettle and the rectifying tower through a solvent feeding pipeline and a rectifying gas discharging pipeline respectively;
the solid-liquid separation net is arranged inside the washing kettle and is positioned at the lower end of the pipe orifice of the polymer discharging pipeline.
2. The aftertreatment device of claim 1, further comprising an air compressor connected to the wash tank via a gas input line.
3. The aftertreatment device of claim 1, wherein the wash tank is further provided with a temperature control system for controlling the temperature within the wash tank.
4. The aftertreatment device of claim 1, further comprising a second condensing tank coupled to the scrubber via a gas output line, and wherein the second condensing tank is provided with a gas outlet and a condensate discharge line.
5. The aftertreatment device of claim 1, further comprising a stirrer disposed within the wash tank.
6. The aftertreatment device of claim 1, further comprising a peristaltic pump disposed on the liquid discharge line.
7. The aftertreatment device of claim 1, further comprising a pressure gauge in communication with the wash tank for measuring pressure within the wash tank.
8. The apparatus of claim 1, wherein the top of the washing tank is a removable structure.
9. The apparatus of claim 1, further comprising a polymer collection column connected to the wash tank by a polymer take-off line.
10. Aftertreatment device according to claim 1, characterized in that a valve is provided on each connection line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321748855.3U CN220194018U (en) | 2023-07-05 | 2023-07-05 | Polyvinyl alcohol and post-treatment device for modified polymer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321748855.3U CN220194018U (en) | 2023-07-05 | 2023-07-05 | Polyvinyl alcohol and post-treatment device for modified polymer thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220194018U true CN220194018U (en) | 2023-12-19 |
Family
ID=89148564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321748855.3U Active CN220194018U (en) | 2023-07-05 | 2023-07-05 | Polyvinyl alcohol and post-treatment device for modified polymer thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220194018U (en) |
-
2023
- 2023-07-05 CN CN202321748855.3U patent/CN220194018U/en active Active
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