CN217627678U - Wastewater treatment system containing vinyl chloride monomer - Google Patents
Wastewater treatment system containing vinyl chloride monomer Download PDFInfo
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- CN217627678U CN217627678U CN202221425131.0U CN202221425131U CN217627678U CN 217627678 U CN217627678 U CN 217627678U CN 202221425131 U CN202221425131 U CN 202221425131U CN 217627678 U CN217627678 U CN 217627678U
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Abstract
The utility model discloses a wastewater treatment system containing vinyl chloride monomer, which comprises a monomer intermediate tank, a water collecting tank, a wastewater tank, a stripping tower, a vinyl chloride monomer raw material pipe, a vinyl chloride monomer collecting pipe, a steam pipe and a wastewater discharge pipe, wherein the outer wall of the water collecting tank is provided with a heating jacket, and the heating jacket is provided with a heat medium inlet and a cooling medium outlet; the heat medium inlet of the heating jacket is connected with the outlet of the heat source device through a pipeline; and the exhaust port of the water collecting tank is communicated with the vinyl chloride monomer collecting pipe. The utility model has the advantages that the waste water containing vinyl chloride monomer is sequentially subjected to two-step order removal by the water collecting tank and the stripping tower, so that the material waste is reduced; the waste water treated by the stripping tower is subjected to two-step heat recovery by the waste water heat exchanger and the water collecting tank, so that the heat loss is small.
Description
The technical field is as follows:
the utility model relates to a polyvinyl chloride production technical field, in particular to free effluent disposal system of chlorine ethylene.
The background art comprises the following steps:
the vinyl chloride monomer is the main raw material needed in the production process of the polyvinyl chloride resin, and the vinyl chloride monomer produced by the vinyl chloride monomer synthesis device is firstly stored in the monomer intermediate tank for buffering and then is sent to the downstream process. The vinyl chloride monomer produced by the vinyl chloride synthesizing device contains certain moisture, most of the moisture in the vinyl chloride monomer is condensed in the monomer intermediate tank in the process that the vinyl chloride monomer is buffered by the monomer intermediate tank, and is collected by a water collector arranged at the lower part of the monomer intermediate tank and then discharged to a waste water tank.
At present, the main ways to treat the wastewater containing vinyl chloride monomer are: waste water containing vinyl chloride monomers in the monomer intermediate tank is collected by a water collector arranged at the lower part of the monomer intermediate tank and then discharged into a waste water tank, the waste water in the waste water tank is sent into a tower through an inlet at the upper part of a stripping tower, steam is introduced into the lower part of the stripping tower, the steam is in countercurrent contact with the waste water, the waste water is fully heated, vinyl chloride monomers in the waste water are removed, the waste water after the monomers are removed is discharged to a waste water treatment process, and the removed vinyl chloride monomers are sent to a gas holder for storage. However, there are the following problems:
1. because the content of the vinyl chloride monomer in the wastewater sent to the stripping tower is higher, the wastewater treated by the stripping tower still contains the vinyl chloride monomer with certain concentration, so that the vinyl chloride monomer is incompletely recycled, and the waste of raw materials is higher;
2. the wastewater treated by the stripping tower is directly discharged to a wastewater treatment process, the temperature of the wastewater mixed with steam in the stripping tower is higher, the heat in the wastewater is not recovered, and the heat loss is large.
The utility model has the following contents:
an object of the utility model is to provide a wastewater treatment system who contains vinyl chloride monomer
The utility model discloses by following technical scheme implement: a wastewater treatment system containing vinyl chloride monomers comprises a monomer intermediate tank, a water collecting tank, a wastewater tank, a stripping tower, a vinyl chloride monomer raw material pipe, a vinyl chloride monomer collecting pipe, a steam pipe and a wastewater discharge pipe, wherein the vinyl chloride monomer raw material pipe is communicated with a feed inlet of the monomer intermediate tank; the outer wall of the water collecting tank is provided with a heating jacket, and the heating jacket is provided with a heat medium inlet and a cooling medium outlet; the heat medium inlet of the heating jacket is connected with the outlet of the heat source device through a pipeline; and the exhaust port of the water collecting tank is communicated with the vinyl chloride monomer collecting pipe.
Further, the heat source device is a waste water heat exchanger; the waste water heat exchanger is arranged on a pipeline communicated between a water outlet of the waste water tank and a feed inlet of the stripping tower, a cold flow inlet of the waste water heat exchanger is communicated with a water outlet of the waste water tank through a pipeline, and a cold flow outlet of the waste water heat exchanger is communicated with a feed inlet of the stripping tower through a pipeline;
the water outlet of the stripping tower is communicated with the heat flow inlet of the waste water heat exchanger through a pipeline, and the heat flow outlet of the waste water heat exchanger is connected with the heat medium inlet of the heating jacket through a pipeline; and a cooling medium outlet of the heating jacket is communicated with the wastewater discharge pipe.
The utility model has the advantages of it is following:
1. the utility model discloses well water catch bowl and stripper carry out preliminary desorption monomer, degree of depth desorption chloroethylene monomer to the waste water that contains chloroethylene monomer in proper order, and chloroethylene monomer content is showing and is reducing in the waste water after two steps of desorption, and chloroethylene monomer retrieves completely in the waste water, and the material waste reduces;
2. the utility model discloses the waste water that leads to earlier in the waste water heat exchanger after the treatment of middle income strip tower preheats the waste water that gets into in the strip tower, and the heating of the heating jacket of reentrant water catch bowl in to the water catch bowl carries out tentatively desorption monomer, has reduced the calorific loss of handling back waste water through two steps of heat recovery.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of a wastewater treatment system containing vinyl chloride monomer according to example 1 of the present invention;
FIG. 2 is a flow chart of another wastewater treatment system containing vinyl chloride monomer according to the embodiment of the present invention.
In the figure, a monomer intermediate tank 1, a water collecting tank 2, a waste water tank 3, a stripping tower 4, a vinyl chloride monomer raw material pipe 5, a vinyl chloride monomer collecting pipe 6, a steam pipe 7, a waste water discharging pipe 8 and a heat source device 9.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, a wastewater treatment system containing vinyl chloride monomer comprises a monomer intermediate tank 1, a water collecting tank 2, a wastewater tank 3, a stripping tower 4, a vinyl chloride monomer raw material pipe 5, a vinyl chloride monomer collecting pipe 6, a steam pipe 7 and a wastewater discharge pipe 8, wherein the vinyl chloride monomer raw material pipe 5 is communicated with a feed inlet of the monomer intermediate tank 1, a water collector water outlet of the monomer intermediate tank 1 is communicated with a water inlet of the water collecting tank 2 through a pipeline, a water outlet of the water collecting tank 2 is communicated with a water inlet of the wastewater tank 3 through a pipeline, a water outlet of the wastewater tank 3 is communicated with a feed inlet of the stripping tower 4 through a pipeline, an exhaust port of the stripping tower 4 is communicated with the vinyl chloride monomer collecting pipe 6, a water outlet of the stripping tower 4 is communicated with the wastewater discharge pipe 8, and the steam pipe 7 is communicated with a steam inlet of the stripping tower 4; the exhaust port of the water collecting tank 2 is communicated with a vinyl chloride monomer collecting pipe 6.
In the embodiment, the outer wall of the water collecting tank 2 is provided with a heating jacket, and the heating jacket is provided with a heat medium inlet and a cooling medium outlet; the heat medium inlet of the heating jacket is connected with the outlet of the heat source device 9 through a pipeline; hot water or steam is introduced into the heating jacket through the heat source device 9 to heat the wastewater in the water collecting tank 2.
The process principle is as follows:
vinyl chloride monomer produced by a vinyl chloride monomer synthesis device is sent into a monomer intermediate tank 1 through a vinyl chloride monomer raw material pipe 5, moisture in the vinyl chloride monomer is condensed in the monomer intermediate tank 1 and is discharged into a water collecting tank 2 after being collected by a water collector arranged at the lower part of the monomer intermediate tank 1, a heating jacket is arranged on the outer wall of the water collecting tank 2, hot water or steam is introduced into the heating jacket through a heat source device 9 to heat wastewater in the water collecting tank 2, the solubility of the vinyl chloride monomer in the water is reduced after the wastewater containing the vinyl chloride monomer is heated in the water collecting tank 2, part of the vinyl chloride monomer is emitted from the wastewater, is discharged from an exhaust port of the water collecting tank 2 and is sent to a gas cabinet for storage through a vinyl chloride monomer collecting pipe 6;
the waste water from which the vinyl chloride monomer is primarily removed by the water collecting tank 2 is sent into the waste water tank 3 for temporary storage, the waste water in the waste water tank 3 is fed into a feed inlet at the upper part of the stripping tower 4, steam is fed into a steam pipe 7 from a steam inlet at the bottom of the stripping tower 4, the steam fed into the stripping tower 4 from bottom to top and the waste water sprayed from top to bottom are in reverse contact in a packing layer of the stripping tower, the waste water is further heated, the vinyl chloride monomer in the waste water is fully released, the released vinyl chloride monomer is discharged from an exhaust port at the top of the stripping tower 4, and the vinyl chloride monomer produced by the water collecting tank 2 are sent to a gas cabinet for storage through a vinyl chloride monomer collecting pipe 6; the wastewater treated by the stripping tower 4 is discharged to a wastewater treatment process through a wastewater discharge pipe 8.
Example 2
As shown in fig. 2, in another wastewater treatment system containing a vinyl chloride monomer, in this embodiment, on the basis of embodiment 1, the heat source device 9 is a wastewater heat exchanger, the wastewater heat exchanger is disposed on a pipeline communicating a water outlet of the wastewater tank 3 and a feed inlet of the stripping tower 4, a cold flow inlet of the wastewater heat exchanger is communicated with a water outlet of the wastewater tank 3 through a pipeline, and a cold flow outlet of the wastewater heat exchanger is communicated with a feed inlet of the stripping tower 4 through a pipeline; the water outlet of the stripping tower 4 is communicated with the heat flow inlet of the waste water heat exchanger through a pipeline, and the heat flow outlet of the waste water heat exchanger is connected with the heat medium inlet of the heating jacket through a pipeline; the outlet of the cooling medium of the heating jacket is communicated with a waste water discharge pipe 8.
The process principle is as follows:
vinyl chloride monomer produced by a vinyl chloride monomer synthesis device is sent into a monomer intermediate tank 1 through a vinyl chloride monomer raw material pipe 5, moisture in the vinyl chloride monomer is condensed in the monomer intermediate tank 1 and is discharged into a water collecting tank 2 after being collected by a water collector arranged at the lower part of the monomer intermediate tank 1, a heating jacket is arranged on the outer wall of the water collecting tank 2, waste water with higher temperature treated by a stripping tower 4 is introduced into the heating jacket, the solubility of the vinyl chloride monomer in the water is reduced after the waste water containing the vinyl chloride monomer is heated in the water collecting tank 2, part of the vinyl chloride monomer is emitted from the waste water and is discharged from an exhaust port of the water collecting tank 2 and is sent to a gas holder for storage through a vinyl chloride monomer collecting pipe 6;
wastewater which is subjected to primary vinyl chloride monomer removal by the water collecting tank 2 is sent to the wastewater tank 3 for temporary storage, the wastewater in the wastewater tank 3 is preheated by a wastewater heat exchanger and then is introduced into a feed inlet at the upper part of the stripping tower 4, steam is introduced from a steam inlet at the bottom of the stripping tower 4 by a steam pipe 7, in the stripping tower 4, the steam introduced from the bottom to the top is in reverse contact with the wastewater sprayed from the top to the bottom in a packing layer of the stripping tower, the wastewater is further heated, the vinyl chloride monomer in the wastewater is fully released, the released vinyl chloride monomer is discharged from an exhaust port at the top of the stripping tower 4, and the released vinyl chloride monomer and the vinyl chloride monomer produced by the water collecting tank 2 are sent to a gas cabinet for storage by a vinyl chloride monomer collecting pipe 6;
because in stripper 4, waste water and the abundant heat transfer of steam, the waste water temperature after 4 tower bottoms of stripper are produced and fully are got rid of vinyl chloride monomer is higher, lead to waste water heat exchanger with this waste water after handling and preheat the waste water that gets into stripper 4, waste water after the processing after the waste water heat exchanger heat transfer lets in the heating jacket of water catch bowl 2, heat the waste water in the water catch bowl 2, on the one hand fully absorb the heat in the waste water after handling, reduce the heat loss, on the other hand heat the higher waste water of vinyl chloride monomer concentration in the water catch bowl 2, vinyl chloride monomer wherein preliminary desorption, waste water after preliminary removal vinyl chloride monomer is again through stripper 4 further processing, adopt the vinyl chloride monomer in the two-step desorption waste water, reach the purpose of fully retrieving vinyl chloride monomer in the waste water.
The waste water after heat exchange by the heating jacket of the water collecting tank 2 is discharged to a waste water treatment process through a waste water discharge pipe 8.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A wastewater treatment system containing vinyl chloride monomer is characterized by comprising a monomer intermediate tank, a water collecting tank, a wastewater tank, a stripping tower, a vinyl chloride monomer raw material pipe, a vinyl chloride monomer collecting pipe, a steam pipe and a wastewater discharge pipe, wherein the vinyl chloride monomer raw material pipe is communicated with a feed inlet of the monomer intermediate tank; the outer wall of the water collecting tank is provided with a heating jacket, and the heating jacket is provided with a heat medium inlet and a cooling medium outlet; the heat medium inlet of the heating jacket is connected with the outlet of the heat source device through a pipeline; and the exhaust port of the water collecting tank is communicated with the vinyl chloride monomer collecting pipe.
2. The system for treating wastewater containing vinyl chloride monomer according to claim 1, wherein the heat source device is a wastewater heat exchanger; the waste water heat exchanger is arranged on a pipeline communicated between a water outlet of the waste water tank and a feed inlet of the stripping tower, a cold flow inlet of the waste water heat exchanger is communicated with a water outlet of the waste water tank through a pipeline, and a cold flow outlet of the waste water heat exchanger is communicated with a feed inlet of the stripping tower through a pipeline;
the water outlet of the stripping tower is communicated with the heat flow inlet of the waste water heat exchanger through a pipeline, and the heat flow outlet of the waste water heat exchanger is connected with the heat medium inlet of the heating jacket through a pipeline; and a cooling medium outlet of the heating jacket is communicated with the wastewater discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221425131.0U CN217627678U (en) | 2022-06-08 | 2022-06-08 | Wastewater treatment system containing vinyl chloride monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221425131.0U CN217627678U (en) | 2022-06-08 | 2022-06-08 | Wastewater treatment system containing vinyl chloride monomer |
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| Publication Number | Publication Date |
|---|---|
| CN217627678U true CN217627678U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221425131.0U Active CN217627678U (en) | 2022-06-08 | 2022-06-08 | Wastewater treatment system containing vinyl chloride monomer |
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| CN (1) | CN217627678U (en) |
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2022
- 2022-06-08 CN CN202221425131.0U patent/CN217627678U/en active Active
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