CN216426926U - Effluent treatment plant is used in chlorinated polyethylene production - Google Patents
Effluent treatment plant is used in chlorinated polyethylene production Download PDFInfo
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- CN216426926U CN216426926U CN202122598891.3U CN202122598891U CN216426926U CN 216426926 U CN216426926 U CN 216426926U CN 202122598891 U CN202122598891 U CN 202122598891U CN 216426926 U CN216426926 U CN 216426926U
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Abstract
The utility model discloses a wastewater treatment device for chlorinated polyethylene production, which comprises a CPE cleaning tank, wherein a feed inlet of the CPE cleaning tank is respectively connected with a first calcium chloride solution storage tank, a clean water tank and a CPE reaction tank, and a discharge outlet of the CPE cleaning tank is respectively connected with the first calcium chloride solution storage tank, a centrifugal tank and a calcium chloride hydrochloric acid solution tank; the discharge port of the centrifugal tank is respectively connected to the waste water tank and the drying device; a discharge port of the calcium chloride hydrochloric acid solution tank is connected to a neutralization tank, and a feed port of the neutralization tank is also connected to a lime storage tank; the discharge port of the neutralization tank is connected to a filter-pressing kettle, and the discharge port of the filter-pressing kettle is respectively connected to a calcium sedimentation tank and a second calcium chloride solution storage tank; the gypsum reaction tank is connected to second calcium chloride solution storage tank discharge gate, and the sodium sulfate solution storage tank is still connected to the feed inlet of gypsum reaction tank, and sodium chloride solution storage tank and gypsum crystal jar are connected respectively to the discharge gate of gypsum reaction tank, and COD processing system is connected to sodium chloride solution storage tank discharge gate. The utility model discloses fully realize the recycle of resource, realized cleaner production.
Description
Technical Field
The utility model belongs to the technical field of chemical production equipment, concretely relates to effluent treatment plant is used in chlorinated polyethylene production.
Background
Along with the rapid development of economy, the pressure of water resource shortage is greater and greater, the importance of reasonably utilizing water resources is more and more prominent, and an effective way for sustainable utilization of water resources is only to fully respect the rule of natural circulation of water resources, realize repeated cyclic utilization of water resources and maintain the cyclic balance of water resources, and is also the basis of the sustainable development of production enterprises. Production enterprises can save water and treat sewage, and the method is not only an inevitable choice for sustainable development of society.
In the production process of Chlorinated Polyethylene (CPE), macromolecules react with chlorine in an aqueous environment in which a corresponding auxiliary agent exists, and the corresponding products are obtained through washing and drying, so that a large amount of acidic wastewater is generated in the production process. If the waste water is directly discharged, the environment is seriously polluted, and the waste water is treated by a conventional waste water treatment process, wherein the conventional waste water treatment process contains a plurality of raw materials and is a neutralization product of strong acid, so that the conventional waste treatment process is huge. How to treat the wastewater has become a significant problem for CPE manufacturing enterprises.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: the waste water treatment device for chlorinated polyethylene production is provided, the water in the reaction process is recycled, the consumption of clean water in the CPE washing process can be reduced, meanwhile, the by-product calcium precipitate and the sodium chloride solution can be used as products to be sent to related production enterprises, and clean production, energy conservation and consumption reduction are realized.
The utility model discloses the theory of operation:
putting acidic slurry containing CPE which is produced in a large amount in the CPE production process into a CPE cleaning tank, introducing a calcium chloride solution, stirring and filtering to obtain neutral slurry containing CPE and calcium chloride and clear liquid containing calcium chloride and hydrochloric acid, introducing the neutral slurry containing CPE and calcium chloride into clear water, washing and filtering while stirring to obtain clear liquid which is a calcium chloride solution, and recycling the clear liquid into the cleaning of the acidic slurry containing CPE; the suspension obtained after washing is CPE containing clear water, and the CPE is obtained after dehydration and drying, so that the yield of the CPE product is increased;
the clear liquid containing calcium chloride and hydrochloric acid is added with lime for neutralization to obtain a calcareous precipitate and a calcium chloride aqueous solution, the calcareous precipitate is treated and then sent to a brick making factory to be used as a raw material, the calcium chloride aqueous solution is reacted with sodium sulfate to obtain calcium sulfate dihydrate crystals (gypsum) and a sodium chloride aqueous solution, and the two products are further treated respectively and then sent to corresponding chemical plants to be used as raw materials.
The whole wastewater treatment process fully realizes the recycling of resources and clean production.
In order to solve the technical problem, the technical scheme of the utility model is that:
a wastewater treatment device for chlorinated polyethylene production comprises a CPE cleaning tank, wherein a feed inlet of the CPE cleaning tank is respectively communicated with discharge outlets of a first calcium chloride solution storage tank, a clean water tank and a CPE reaction tank through pipelines and pumps (all the devices in the future are communicated through the pipelines and the pumps), and a discharge outlet of the CPE cleaning tank is respectively communicated with feed inlets of the first calcium chloride solution storage tank, a centrifugal tank and a calcium chloride hydrochloric acid solution tank; the discharge hole of the centrifugal tank is respectively communicated with the waste water tank and the feed inlet of the drying device;
the discharge hole of the calcium chloride hydrochloric acid solution tank is communicated with the feed hole of the neutralization tank, and the feed hole of the neutralization tank is also communicated with the discharge hole of the lime storage tank; the discharge port of the neutralization tank is communicated with the feed port of the filter-pressing kettle, and the discharge port of the filter-pressing kettle is respectively communicated with the feed ports of the calcareous sedimentation tank and the second calcium chloride solution storage tank; the discharge gate of second calcium chloride solution storage tank communicates the feed inlet of gypsum retort, and the feed inlet of gypsum retort still communicates the discharge gate of sodium sulfate solution storage tank, and the discharge gate of gypsum retort communicates the feed inlet of sodium chloride solution storage tank and the feed inlet of gypsum crystal storage tank respectively, and the discharge gate of sodium chloride solution storage tank communicates the feed inlet of COD processing system.
Preferably, the feed inlet of the sodium sulfate solution storage tank is communicated with the discharge outlet of the mirabilite storage tank. Conveying mirabilite (sodium sulfate) into a sodium sulfate solution storage tank to prepare a sodium sulfate solution, reacting the prepared sodium sulfate solution with calcium chloride in a calcium chloride aqueous solution pool to obtain calcium sulfate dihydrate crystals and sodium chloride, and dissolving the sodium chloride in a solvent to form a sodium chloride solution; the calcium sulfate dihydrate crystals are sold as a shaped product.
Furthermore, the sodium sulfate solution storage tank is provided with a feeding device, a heating device and a stirring device, and can be used for heating and dissolving mirabilite and storing solution.
Preferably, the COD treatment system is an activated carbon absorption tower tank and is used for carrying out COD removal treatment on the sodium chloride solution. The treated sodium chloride solution is then sent to a chlor-alkali plant for use as a feedstock.
Preferably, the first calcium chloride solution storage tank and the second calcium chloride solution storage tank are respectively provided with a feeding device and a stirring device.
Preferably, the water inlet of the clean water tank is communicated with a water purification system.
Preferably, the CPE cleaning tank is an enamel tank and is provided with a heat preservation device, a stirring device and a filtering device. Has the functions of heat preservation, stirring and filtration. Wherein, the filtration function is to CPE's filtration, and solution can filter out, and CPE powder can't pass through.
Preferably, the calcium chloride hydrochloric acid solution tank, the centrifugal tank, the neutralization tank, the filter-pressing kettle, the gypsum reaction tank, the sodium chloride solution storage tank and the gypsum crystal storage tank are all enamel tanks.
Preferably, the neutralizing tank is provided with a stirring device and a reflux device. Can stir and flow back from top to bottom the liquid in the jar body, guarantee the speed and the reaction uniformity of acid-base neutralization process in the cauldron, be favorable to pH to be worth stable control.
Preferably, the centrifugal tank is a centrifugal separator manufactured by Jiangsu Yifu science and technology GmbH.
Preferably, the filter pressing kettle is a high-pressure filter kettle. And (4) filtering out clear liquid, putting the clear liquid into a second calcium chloride solution storage tank, and putting filter residues which are calcium precipitates into a calcium precipitation tank.
Preferably, the gypsum reaction tank is provided with a heating device and a stirring device. The temperature can be controlled to within ± 5 ℃.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the utility model discloses a with the retrieval and utilization of reaction process normal water, can reduce the consumption of CPE's washing in-process clear water, reduce the output of acid waste water promptly to become but recycle's resource with acid waste water through a series of processings, the calcium sulfate dihydrate of output, gypsum product promptly, deposit calcium of by-product and sodium chloride solution all can be sent to relevant manufacturing enterprise as the product, realize cleaner production, energy saving and consumption reduction.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure, 1, a CPE cleaning tank; 2. a first calcium chloride solution storage tank; 3. a clean water tank; 4. a CPE reaction tank; 5. a centrifuge tank; 6. a calcium chloride hydrochloric acid solution tank; 7. a waste water tank; 8. a drying device; 9. a neutralization tank; 10. a lime storage tank; 11. a filter pressing kettle; 12. a calcareous sedimentation tank; 13. a second calcium chloride solution storage tank; 14. a sodium sulfate solution storage tank; 15. a gypsum reaction tank; 16. a sodium chloride solution storage tank; 17. a gypsum crystal storage tank; 18. a COD treatment system; 19. mirabilite storage tank.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
Example one
As shown in fig. 1, the utility model relates to a wastewater treatment device for chlorinated polyethylene production, which comprises a CPE cleaning tank 1, wherein the feed inlet of the CPE cleaning tank 1 is respectively communicated with the discharge outlets of a first calcium chloride solution storage tank 2, a clean water tank 3 and a CPE reaction tank 4 through a pipeline and a pump, and the discharge outlet of the CPE cleaning tank 1 is respectively communicated with the feed inlets of the first calcium chloride solution storage tank 2, a centrifugal tank 5 and a calcium chloride hydrochloric acid solution tank 6 through a pipeline and a pump; the discharge hole of the centrifugal tank 5 is respectively communicated with the feed inlets of the waste water tank 7 and the drying device 8;
a discharge hole of the calcium chloride hydrochloric acid solution tank 6 is communicated with a feed hole of the neutralization tank 9, and the feed hole of the neutralization tank 9 is also communicated with a discharge hole of a lime storage tank 10; the discharge port of the neutralization tank 9 is communicated with the feed port of the filter-pressing kettle 11, the discharge port of the filter-pressing kettle 11 is communicated with the feed ports of the calcareous sedimentation tank 12 and the second calcium chloride solution storage tank 13 respectively, the discharge port of the second calcium chloride solution storage tank 13 is communicated with the feed port of the gypsum reaction tank 15, the feed port of the gypsum reaction tank 15 is also communicated with the discharge port of the sodium sulfate solution storage tank 14, the discharge port of the gypsum reaction tank 15 is communicated with the feed port of the sodium chloride solution storage tank 16 and the feed port of the gypsum crystal storage tank 17 respectively, and the discharge port of the sodium chloride solution storage tank 16 is communicated with the feed port of the COD treatment system 18 (activated carbon absorption tower).
The feed inlet of the sodium sulfate solution storage tank 14 is communicated with the discharge outlet of the mirabilite storage tank 19.
The utility model discloses during actual production, the acid thick liquids that contain CPE that the reaction obtained in the CPE retort 4 at first carry to CPE washs jar 1, prepares calcium chloride solution in first calcium chloride solution storage tank 2 simultaneously, washs CPE and washs the acid thick liquids that contain CPE to neutral in jar 1 with calcium chloride solution, washs while stirring, obtains the mixed liquid (supernatant) of neutral thick liquids (turbid liquid) and calcium chloride hydrochloric acid that contain CPE, calcium chloride. Then filtering the calcium chloride mixed acid solution to a calcium chloride hydrochloric acid solution tank 6, injecting clear water conveyed from a clear water tank 3 into a CPE cleaning tank 1, cleaning neutral slurry containing CPE and calcium chloride, conveying the calcium chloride solution obtained after cleaning back to a first calcium chloride solution storage tank 2 for recycling, conveying the CPE containing clear water obtained in addition to a centrifugal tank 5 for centrifugation, conveying the centrifuged wastewater to a wastewater tank 7, conveying the obtained CPE into a drying device 8 for drying, and drying to obtain a CPE finished product.
Introducing a calcium chloride and hydrochloric acid mixed solution in a calcium chloride and hydrochloric acid solution tank 6 and lime in a lime storage tank 10 into a neutralization tank 9 for neutralization, after the neutralization is finished, conveying an obtained product to a filter pressing kettle 11 for filter pressing, conveying obtained filter residue to a calcareous sedimentation tank 12 to obtain a calcium chloride solution as a liquid, conveying the calcium chloride solution to a second calcium chloride solution storage tank 13 for temporary storage, conveying the calcium chloride solution to a gypsum reaction tank 15 for reaction with a sodium sulfate solution from a sodium sulfate solution storage tank 14 to obtain gypsum and a sodium chloride solution containing COD, treating the gypsum in the gypsum reaction tank 15 to obtain gypsum crystals, and conveying the gypsum crystals to a gypsum crystal storage tank 17 for storage; the sodium chloride solution containing COD is treated by the COD treatment system 18 and then is conveyed to a chlor-alkali plant to be used as a raw material.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Claims (8)
1. The utility model provides a effluent treatment plant is used in chlorinated polyethylene production which characterized in that: the device comprises a CPE cleaning tank, wherein a feed inlet of the CPE cleaning tank is respectively communicated with a discharge hole of a first calcium chloride solution storage tank, a clear water tank and a CPE reaction tank through a pipeline and a pump, and a discharge hole of the CPE cleaning tank is respectively communicated with a feed inlet of the first calcium chloride solution storage tank, a centrifugal tank and a calcium chloride hydrochloric acid solution tank; the discharge hole of the centrifugal tank is respectively communicated with the waste water tank and the feed inlet of the drying device;
the discharge hole of the calcium chloride hydrochloric acid solution tank is communicated with the feed hole of the neutralization tank, and the feed hole of the neutralization tank is also communicated with the discharge hole of the lime storage tank; the discharge hole of the neutralization tank is communicated with the feed hole of the filter-pressing kettle, and the discharge hole of the filter-pressing kettle is respectively communicated with the feed holes of the calcareous sedimentation tank and the second calcium chloride solution storage tank; the discharge hole of the second calcium chloride solution storage tank is communicated with the feed hole of the gypsum reaction tank, the feed hole of the gypsum reaction tank is also communicated with the discharge hole of the sodium sulfate solution storage tank, and the discharge hole of the gypsum reaction tank is respectively communicated with the feed hole of the sodium chloride solution storage tank and the feed hole of the gypsum crystal storage tank; and the discharge hole of the sodium chloride solution storage tank is communicated with the feed inlet of the COD treatment system.
2. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: and the feed inlet of the sodium sulfate solution storage tank is communicated with the discharge outlet of the mirabilite storage tank.
3. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the COD treatment system is an activated carbon absorption tower tank.
4. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the CPE cleaning tank is an enamel tank and is provided with a heat preservation device, a stirring device and a filtering device; the calcium chloride hydrochloric acid solution tank, the centrifugal tank, the neutralization tank, the filter-pressing kettle, the gypsum reaction tank, the sodium chloride solution storage tank and the gypsum crystal storage tank are all enamel tanks.
5. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the water inlet of the clean water tank is communicated with a water purification system.
6. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the sodium sulfate solution storage tank is provided with a feeding device, a heating device and a stirring device; and a feeding device and a stirring device are respectively arranged in the first calcium chloride solution storage tank and the second calcium chloride solution storage tank.
7. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the filter pressing kettle is a high-pressure filter kettle.
8. The apparatus for treating wastewater for chlorinated polyethylene production according to claim 1, wherein: the neutralization tank is provided with a stirring device and a reflux device, and the gypsum reaction tank is provided with a heating device and a stirring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122598891.3U CN216426926U (en) | 2021-10-27 | 2021-10-27 | Effluent treatment plant is used in chlorinated polyethylene production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122598891.3U CN216426926U (en) | 2021-10-27 | 2021-10-27 | Effluent treatment plant is used in chlorinated polyethylene production |
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| Publication Number | Publication Date |
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| CN216426926U true CN216426926U (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122598891.3U Active CN216426926U (en) | 2021-10-27 | 2021-10-27 | Effluent treatment plant is used in chlorinated polyethylene production |
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2021
- 2021-10-27 CN CN202122598891.3U patent/CN216426926U/en active Active
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