CN215693001U - Washing device for vinyl chloride polymerization recovered monomer - Google Patents
Washing device for vinyl chloride polymerization recovered monomer Download PDFInfo
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- CN215693001U CN215693001U CN202121442802.XU CN202121442802U CN215693001U CN 215693001 U CN215693001 U CN 215693001U CN 202121442802 U CN202121442802 U CN 202121442802U CN 215693001 U CN215693001 U CN 215693001U
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Abstract
The utility model relates to a washing device for recovering monomers in vinyl chloride polymerization, which comprises: the device comprises a water washing tower, a gas inlet and a circulating liquid outlet are formed in the bottom of the water washing tower, a gas outlet and a circulating liquid inlet are formed in the top of the water washing tower, and a liquid distributor is arranged in the circulating liquid inlet; the heat exchanger, the circulation liquid export through first pipeline with the heat exchanger is connected, be provided with the circulating liquid pump on the first pipeline, the heat exchanger through the second pipeline with circulation liquid access connection, the heat exchanger is connected with and is used for to the heat exchanger carries heat transfer medium's heat transfer input tube and is used for exporting the heat transfer medium's heat transfer output tube. The utility model is provided with the heat exchanger, can effectively adjust the temperature of the circulating liquid when the circulating liquid returns to the water washing tower, can effectively ensure that the temperature of the circulating liquid is in a controllable range, can effectively remove impurities in the recycled vinyl chloride, and ensures that the performance of vinyl chloride monomers generated in the water washing process is stable.
Description
Technical Field
The utility model relates to the technical field of vinyl chloride production equipment, in particular to a washing device for recovering monomers in vinyl chloride polymerization.
Background
In the production process of polyvinyl chloride (PVC), whether suspension polymerization or bulk polymerization is adopted, a part of monomers cannot be completely converted, the conversion rate of suspension polymerization is about 85%, the conversion rate of bulk polymerization is about 60%, and a large amount of recovered monomers exist. The recovered monomer components are complex and have high-boiling-point substance impurities such as PVC fine particles, residual initiator, water, hydrogen chloride, dichloromethane, aldehydes and the like.
At present, chloroethylene recovered monomer is treated by a washing tower in the treatment process, partial impurities in the chloroethylene monomer can be removed, however, water can be brought in the washing process, especially, impurities in the chloroethylene monomer in the washing process are dissolved in water, work is performed on circulating liquid when the impurities in the chloroethylene monomer are dissolved in the circulating process of the circulating liquid, a polymerization inhibitor is added into the circulating liquid to react with an initiator, the pressure change of the chloroethylene monomer and the change of the environmental temperature can all cause the temperature of the circulating liquid to change. When the temperature rises, the vinyl chloride monomer after washing can bring water vapor into the next recovery process, so that the difficulty of the next treatment is increased.
SUMMERY OF THE UTILITY MODEL
The present invention provides a washing apparatus for vinyl chloride polymerization recovery monomer, which has a simple structure and can effectively reduce water in vinyl chloride monomer, to solve at least one of the above technical problems.
The technical scheme for solving the technical problems is as follows:
a vinyl chloride polymerization recovered monomer washing device comprises:
the device comprises a water washing tower, a gas inlet and a circulating liquid outlet are formed in the bottom of the water washing tower, a gas outlet and a circulating liquid inlet are formed in the top of the water washing tower, and a liquid distributor is arranged in the circulating liquid inlet;
the heat exchanger, the circulation liquid export through first pipeline with the heat exchanger is connected, be provided with the circulating liquid pump on the first pipeline, the heat exchanger through the second pipeline with circulation liquid access connection, the heat exchanger is connected with and is used for to the heat exchanger carries heat transfer medium's heat transfer input tube and is used for exporting the heat transfer medium's heat transfer output tube.
The utility model has the beneficial effects that: the utility model is provided with the heat exchanger, can effectively adjust the temperature of the circulating liquid when the circulating liquid returns to the water washing tower, can effectively ensure that the temperature of the circulating liquid is in a controllable range, can effectively remove impurities in the recycled vinyl chloride, and ensures that the performance of vinyl chloride monomers generated in the water washing process is stable.
On the basis of the technical scheme, the utility model can be further improved as follows.
Further, the first pipeline comprises a pipeline A and a pipeline B, one end of the pipeline A is connected with the circulating liquid outlet, the other end of the pipeline A is connected with the input end of the circulating liquid pump, one end of the pipeline B is connected with the output end of the circulating liquid pump, the other end of the pipeline B is connected with the heat exchanger, a water inlet pipe is arranged on the pipeline A, one end of the water inlet pipe is connected with the pipeline A, a waste liquid pipe is arranged on the pipeline B, and one end of the waste liquid pipe is connected with the pipeline B.
The beneficial effect of adopting the further scheme is that: the inlet tube can be convenient for supply fresh circulating liquid to the washing tower, and the waste liquid pipe can be convenient for wash the discharge of waste liquid.
Further, be provided with the waste liquid governing valve on the waste liquid pipe, the bottom of washing tower is provided with the level gauge, the level gauge with the waste liquid governing valve electricity is connected.
The beneficial effect of adopting the further scheme is that: the waste liquid governing valve is connected with the level gauge electricity, can be convenient for according to the liquid level of washing tower bottom, the discharge amount of adjustment waste liquid.
Furthermore, a circulating liquid regulating valve is arranged on the pipeline B.
The beneficial effect of adopting the further scheme is that: the circulating liquid regulating valve can regulate the circulating amount of the circulating liquid, and is convenient for water washing control.
Further, the top and the bottom of the water washing tower are provided with pressure gauges.
The beneficial effect of adopting the further scheme is that: the pressure gauge can measure the gas phase pressure at the bottom and the top of the washing tower, and is convenient for regulating and controlling the temperature of the circulating liquid in the washing tower.
Furthermore, a heat exchange regulating valve is arranged on the heat exchange output pipe, a thermometer is arranged on the second pipeline, and the thermometer is electrically connected with the heat exchange regulating valve.
The beneficial effect of adopting the further scheme is that: the heat exchange regulating valve can be used for conveniently regulating the heat exchange quantity of a heat exchange medium and can be beneficial to ensuring the temperature stability of the circulating liquid.
Further, the heat exchange medium is ice water at 5 ℃ or hot water at 60-150 ℃.
The beneficial effect of adopting the further scheme is that: the ice water can lower the temperature of the circulating liquid, the influence of the ambient temperature on the washing temperature can be avoided in summer, the hot water can raise the temperature of the circulating liquid, and the circulating liquid can be prevented from being too cold and being crystallized to block a conveying pipeline in winter.
Further, the water washing tower is a packed tower.
The beneficial effect of adopting the further scheme is that: the packed tower can increase the contact area with the vinyl chloride monomer in the washing process, and is favorable for removing impurities.
Furthermore, the packed tower comprises a first packing and a second packing arranged above the first packing, a gas distributor is arranged below the first packing, a gas distributor is arranged above the first packing, a liquid distributor is arranged above the second packing, and a liquid redistributor is arranged below the second packing.
The beneficial effect of adopting the further scheme is that: the liquid redistributor can be matched with the gas redistributor, so that the contact area of gas-liquid mixing is increased, and the washing effect is better.
Further, the first filler and the second filler are corrugated plate fillers.
The beneficial effect of adopting the further scheme is that: the corrugated plate filler has long liquid phase retention time, and can improve the washing effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a water scrubber according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. washing the tower with water; 2. a circulating liquid pump; 3. a heat exchanger; 4. a first pipeline; 41. a line A; 42. a line B; 5. a second pipeline; 6. a heat exchange input pipe; 7. a heat exchange output pipe; 8. a water inlet pipe; 9. a waste liquid pipe; 10. a pressure gauge; 11. a liquid level meter; 12. a waste liquid regulating valve; 13. a circulating liquid regulating valve; 14. a thermometer; 15. a heat exchange regulating valve; 16. a gas inlet; 17. a gas outlet; 18. a circulating liquid outlet; 19. a circulating liquid inlet; 20. a liquid distributor; 21. a first filler; 22. a second filler; 23. a liquid redistributor; 24. a gas distributor; 25. a gas redistributor.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
Examples
As shown in figures 1 and 2, the core of the utility model is to provide a washing device for recovering monomers in vinyl chloride polymerization, comprising: the device comprises a water washing tower 1, wherein a gas inlet 16 and a circulating liquid outlet 18 are arranged at the bottom of the water washing tower 1, a gas outlet 17 and a circulating liquid inlet 19 are arranged at the top of the water washing tower 1, and a liquid distributor 20 is arranged in the circulating liquid inlet 19; the heat exchanger 3, circulation liquid outlet 18 is connected with heat exchanger 3 through first pipeline 4, is provided with circulating liquid pump 2 on the first pipeline 4, and heat exchanger 3 is connected with circulation liquid inlet through second pipeline 5, and heat exchanger 3 is connected with heat transfer input tube 6 that is used for carrying heat transfer medium to heat exchanger 3 and is used for exporting heat transfer medium's heat transfer output tube 7.
The recycled vinyl chloride monomer contains hydrogen chloride, PVC fine powder, aldehydes and an initiator, water is mainly adopted in circulating liquid, in order to remove the initiator, one of sodium nonyl phenolate, hydroquinone and sodium nitrite is added into the water as a polymerization inhibitor to react with the initiator so as to remove the initiator in the recycled monomer, the self-polymerization of the vinyl chloride monomer is relieved, and the hydrogen chloride, the PVC fine powder and the aldehyde impurities can be dissolved in the water, so that the vinyl chloride monomer is discharged from a gas outlet 17 and enters a decanter for treatment in the next step.
Preferably, the first pipeline 4 comprises a pipeline a 41 and a pipeline B42, one end of the pipeline a 41 is connected with the circulating liquid outlet 18, the other end of the pipeline a 41 is connected with the input end of the circulating liquid pump 2, one end of the pipeline B42 is connected with the output end of the circulating liquid pump 2, the other end of the pipeline B42 is connected with the heat exchanger 3, a water inlet pipe 8 is arranged on the pipeline a 41, one end of the water inlet pipe 8 is connected with the pipeline a 41, a waste liquid pipe 9 is arranged on the pipeline B42, and one end of the waste liquid pipe 9 is connected with the pipeline B42.
Preferably, a waste liquid regulating valve 12 is arranged on the waste liquid pipe 9, a liquid level meter 11 is arranged at the bottom of the water washing tower 1, and the liquid level meter 11 is electrically connected with the waste liquid regulating valve 12.
Preferably, the line B42 is provided with a circulating liquid regulating valve 13.
Preferably, the water washing column 1 is provided with pressure gauges 10 at both the top and bottom thereof.
Preferably, the heat exchange output pipe 7 is provided with a heat exchange regulating valve 15, the second pipeline 5 is provided with a thermometer 14, and the thermometer 14 is electrically connected with the heat exchange regulating valve 15.
The heat exchange regulating valve 15, the waste liquid regulating valve 12, and the circulating liquid regulating valve 13 are all pneumatic regulating valves.
Preferably, the heat exchange medium is 5 ℃ ice water or 60-150 ℃ hot water, wherein in summer, the 5 ℃ ice water is selected for cooling, and in winter, the 65 ℃ hot water is used for heating the circulating liquid.
Preferably, the water washing column 1 is a packed column.
Preferably, the packed tower comprises a first packing 21 and a second packing 22 arranged above the first packing 21, wherein a gas distributor 24 is arranged below the first packing 21, a gas distributor is arranged above the first packing 21, a liquid distributor 20 is arranged above the second packing 22, and a liquid redistributor 23 is arranged below the second packing 22.
Preferably, the first filler 21 and the second filler 22 are corrugated plate fillers.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A vinyl chloride polymerization recovered monomer washing device is characterized by comprising:
the device comprises a water washing tower (1), wherein a gas inlet (16) and a circulating liquid outlet (18) are formed in the bottom of the water washing tower (1), a gas outlet (17) and a circulating liquid inlet (19) are formed in the top of the water washing tower (1), and a liquid distributor (20) is arranged in the circulating liquid inlet (19);
the heat exchanger (3), circulation liquid export (18) through first pipeline (4) with heat exchanger (3) are connected, be provided with circulating liquid pump (2) on first pipeline (4), heat exchanger (3) through second pipeline (5) with circulation liquid access connection, heat exchanger (3) be connected with be used for to heat exchanger (3) carry heat transfer medium's heat transfer input tube (6) and be used for exporting heat transfer medium's heat transfer output tube (7).
2. A vinyl chloride polymerization recycling monomer washing device according to claim 1, wherein said first pipeline (4) comprises a pipeline a (41) and a pipeline B (42), one end of said pipeline a (41) is connected to said circulating liquid outlet (18), the other end of said pipeline a (41) is connected to the input end of said circulating liquid pump (2), one end of said pipeline B (42) is connected to the output end of said circulating liquid pump (2), the other end of said pipeline B (42) is connected to said heat exchanger (3), said pipeline a (41) is provided with a water inlet pipe (8), one end of said water inlet pipe (8) is connected to said pipeline a (41), said pipeline B (42) is provided with a waste liquid pipe (9), and one end of said waste liquid pipe (9) is connected to said pipeline B (42).
3. A vinyl chloride polymerization recovered monomer washing device as claimed in claim 2, characterized in that said waste liquid pipe (9) is provided with a waste liquid regulating valve (12), the bottom of said washing tower (1) is provided with a liquid level meter (11), said liquid level meter (11) is electrically connected with said waste liquid regulating valve (12).
4. The apparatus for washing monomers recovered from polymerization of vinyl chloride according to claim 2, wherein said line B (42) is provided with a circulating liquid regulating valve (13).
5. A vinyl chloride polymerization recovered monomer washing apparatus according to claim 1, wherein the top and bottom of said washing column (1) are provided with pressure gauges (10).
6. A vinyl chloride polymerization recycled monomer washing device as claimed in claim 1, wherein said heat exchange output pipe (7) is provided with a heat exchange regulating valve (15), said second pipeline (5) is provided with a thermometer (14), and said thermometer (14) is electrically connected with said heat exchange regulating valve (15).
7. The vinyl chloride polymerization recovered monomer washing device as claimed in claim 1, wherein the heat exchange medium is ice water at 5 ℃ or hot water at 60-150 ℃.
8. A washing apparatus for monomers recycled from vinyl chloride polymerization according to any of claims 1-7, characterized in that the washing column (1) is a packed column.
9. A vinyl chloride polymerization recycled monomer washing device as claimed in claim 8, characterized in that said packed tower comprises a first packing (21) and a second packing (22) arranged above said first packing (21), a gas distributor (24) is arranged below said first packing (21), a gas distributor is arranged above said first packing (21), said liquid distributor (20) is arranged above said second packing (22), and a liquid redistributor (23) is arranged below said second packing (22).
10. A vinyl chloride polymerization recycled monomer washing unit according to claim 9, characterized in that said first filler (21) and said second filler (22) are corrugated plate fillers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121442802.XU CN215693001U (en) | 2021-06-28 | 2021-06-28 | Washing device for vinyl chloride polymerization recovered monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121442802.XU CN215693001U (en) | 2021-06-28 | 2021-06-28 | Washing device for vinyl chloride polymerization recovered monomer |
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| Publication Number | Publication Date |
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| CN215693001U true CN215693001U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121442802.XU Active CN215693001U (en) | 2021-06-28 | 2021-06-28 | Washing device for vinyl chloride polymerization recovered monomer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116726636A (en) * | 2023-08-14 | 2023-09-12 | 北京海望氢能科技有限公司 | Gas water scrubber and gas separation system |
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2021
- 2021-06-28 CN CN202121442802.XU patent/CN215693001U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116726636A (en) * | 2023-08-14 | 2023-09-12 | 北京海望氢能科技有限公司 | Gas water scrubber and gas separation system |
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