CN203333413U - System for comprehensively utilizing wastewater generated during production of polyvinyl chloride (PVC) production by calcium carbide method - Google Patents
System for comprehensively utilizing wastewater generated during production of polyvinyl chloride (PVC) production by calcium carbide method Download PDFInfo
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- CN203333413U CN203333413U CN2013203588444U CN201320358844U CN203333413U CN 203333413 U CN203333413 U CN 203333413U CN 2013203588444 U CN2013203588444 U CN 2013203588444U CN 201320358844 U CN201320358844 U CN 201320358844U CN 203333413 U CN203333413 U CN 203333413U
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Abstract
The utility model relates to a system for comprehensively utilizing wastewater generated during production of polyvinyl chloride (PVC) by a calcium carbide method. The system comprises a slurry settling pond, wherein the slurry settling pond is connected with a first sedimentation pond through a pipeline; a reagent bin and an acetylene cleaner are communicated with the pipeline between the slurry settling pond and the first sedimentation pond through a conveying pipe and a material pipe; a slurry pipe is arranged at the bottom of the first sedimentation pond and is communicated with a dehydration device; a conveying channel communicated with a second sedimentation pond is formed in the upper part of the first sedimentation pond; a mirabilite tank is communicated with the second sedimentation pond through a pipeline; the dehydration device is arranged at the bottom of the second sedimentation pond and is communicated with the second sedimentation pond through the material pipe; and a pipeline communicated with an acetylene generator is arranged on the top of the second sedimentation pond. The system can produce calcium phosphate and calcium sulfate by utilizing supernatant liquid of calcium carbide slurry in the slurry settling pond, can effectively extract phosphate radical from sodium hypochlorite wastewater generated during the acetylene cleaning process of the acetylene cleaner and calcium from the supernatant liquid of the calcium carbide slurry, can relatively avoid pollution caused by impurities and can eliminate air pollution.
Description
Technical field
The utility model belongs to the wastewater utilization field that calcium carbide route is produced PVC, particularly
Say and relate to the comprehensive wastewater recycling system that a kind of calcium carbide route is produced PVC.
Background technology
Calcium carbide route is produced in the PVC industry, because the calcium carbide composition contains calcium phosphide and sulfurated lime, causes and generates in the acetylene process, and calcium phosphide and sulfurated lime react with water, produce phosphuret-(t)ed hydrogen, hydrogen sulfide toxic gas; The acetylene gas produced is through rare chlorine bleach liquor, and removes phosphuret-(t)ed hydrogen, hydrogen sulfide, processes the clorox waste water of gas, after sewage plant acetylene cleanser is processed, discharges outside factory, and the clorox waste water of processing gas must not have effective utilization.Simultaneously, generate in the acetylene process and produce a large amount of carbide slags, carbide slag is transported to slag stock tank settling tank and carries out the sedimentation processing, and after sedimentation, supernatant liquid reenters carbide-feed generator and reacted.
There are problems in above-mentioned technique: such as acetylene cleaning clorox waste water is discharged from outside factory, be a kind of waste to water resources, the phosphate radical that simultaneously in waste water, contains a great deal of, bring certain burden to sewage disposal; Carbide slag slurries supernatant liquid main component is Ca (OH) 2 solution, can be in conjunction with phosphuret-(t)ed hydrogen, hydrogen sulfide, cause supernatant liquid to there is the smell of pungent stench, and this smell can exist for a long time, evidence: such clear liquid is shelved 1 year to 2 years, stench does not still subtract, and can cause chronic pollution to air.
Summary of the invention
The purpose of this utility model is to provide a kind of calcium carbide route to produce the comprehensive utilization system for waste water of PVC, solved that calcium carbide route produces that acetylene cleaning clorox waste water in the PVC industry is not utilized and carbide slag slurries in the effective constituent technical problem underused, this system synthesis utilizes calcium carbide route to produce the atmospheric pollution that PVC waste water has been eliminated simultaneously.
For achieving the above object, the utility model is by the following technical solutions:
A kind of calcium carbide route is produced the comprehensive utilization system for waste water of PVC, comprise slag slurry settling tank, slag slurry settling tank is communicated with the first settling bowl by pipeline, agent bin is communicated on the pipeline between slag slurry settling tank and the first settling bowl by transfer lime, the bottom of the first settling bowl is provided with slurry pipe, slurry pipe is communicated with dewatering unit, the top of the first settling bowl is provided with the conveying road be communicated with the second settling bowl, the saltcake groove is communicated with the second settling bowl by pipeline, bottom at the second settling bowl is provided with dewatering unit, dewatering unit is communicated with the logical charge tube of the second settling bowl, be provided with the pipeline be communicated with carbide-feed generator at the top of the second settling bowl.
Above-mentioned calcium carbide route is produced the comprehensive utilization system for waste water of PVC, and described acetylene cleanser is communicated on the pipeline between slag slurry settling tank and the first settling bowl by feed-pipe.
Adopt technique scheme, the utility model has following advantage: the utility model can be produced calcium phosphate, calcium sulfate by enough carbide slag slurries supernatant liquids from slag slurry settling tank, phosphate radical in the acetylene cleaning clorox waste water of effective extraction acetylene cleanser and the calcium in the carbide slag slurries supernatant liquid, can relatively avoid contaminating impurity, can eliminate atmospheric pollution simultaneously, achieve many things at one stroke, realized the comprehensive utilization of waste water.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
A kind of calcium carbide route is as shown in Figure 1 produced the comprehensive utilization system for waste water of PVC, comprise slag slurry settling tank, slag slurry settling tank is communicated with the first settling bowl by pipeline, agent bin and acetylene cleanser are communicated on the pipeline between slag slurry settling tank and the first settling bowl by transfer lime and feed-pipe respectively, the bottom of the first settling bowl is provided with slurry pipe, slurry pipe is communicated with dewatering unit, the top of the first settling bowl is provided with the conveying road be communicated with the second settling bowl, the saltcake groove is communicated with the second settling bowl by pipeline, bottom at the second settling bowl is provided with dewatering unit, dewatering unit is communicated with the logical charge tube of the second settling bowl, be provided with the pipeline be communicated with carbide-feed generator at the top of the second settling bowl.
Working process of the present utility model is as follows: the chlorine in agent bin or chlorine bleach liquor are passed in the carbide slag slurries supernatant liquid in slag slurry settling tank, make phosphuret-(t)ed hydrogen and the hydrogen sulfide of combination in solution be oxidized to phosphate radical and sulfate radical, phosphate radical, sulfate radical become precipitation in neutrality or alkaline environment chance Ca2+, thereby remove phosphuret-(t)ed hydrogen and hydrogen sulfide, calcium phosphate, the calcium sulfate of Sync enrichment the first settling bowl bottom sedimentation, calcium phosphate and calcium sulfate after the first settling bowl precipitation enrichment, through filter-press dehydration, can be used as respectively finished product and sell.Acetylene cleanser acetylene cleaning clorox waste water out on the other hand, the carbide slag slurries supernatant liquid also led in slag slurry settling tank mixes with the carbide slag slurries supernatant liquid, utilize phosphate radical and the sulfate radical of Ca2+ in waste water in supernatant liquid to be combined, thereby the precipitation of generation, after sedimentation, will precipitate enrichment out.Except the upper strata stillness of night after peroxophosphoric acid root and sulfate radical enters the second settling bowl, in the situation that still there is Ca2+, by pipeline, the saltcake in the saltcake groove is joined to the second settling bowl, generate hydrated calcium sulfate, the supernatant liquid after the second settling bowl sedimentation enters the carbide-feed generator reaction.
Relate to adding of saltcake in this technique, in chlor-alkali industry, usually adopt the embrane method denitrating technique at present, thus the by-product saltcake, but saltcake value is lower, and comparatively difficult as commodity selling, usually all go out of use, and be not utilized.But, in this technique, in order to extract the calcium ion in waste water, be utilized.
Claims (2)
1. a calcium carbide route is produced the comprehensive utilization system for waste water of PVC, comprise slag slurry settling tank, it is characterized in that: slag slurry settling tank is communicated with the first settling bowl by pipeline, agent bin is communicated on the pipeline between slag slurry settling tank and the first settling bowl by transfer lime, the bottom of the first settling bowl is provided with slurry pipe, slurry pipe is communicated with dewatering unit, the top of the first settling bowl is provided with the conveying road be communicated with the second settling bowl, the saltcake groove is communicated with the second settling bowl by pipeline, bottom at the second settling bowl is provided with dewatering unit, dewatering unit is communicated with the logical charge tube of the second settling bowl, be provided with the pipeline be communicated with carbide-feed generator at the top of the second settling bowl.
2. calcium carbide route according to claim 1 is produced the comprehensive utilization system for waste water of PVC, it is characterized in that: described acetylene cleanser is communicated on the pipeline between slag slurry settling tank and the first settling bowl by feed-pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203588444U CN203333413U (en) | 2013-06-21 | 2013-06-21 | System for comprehensively utilizing wastewater generated during production of polyvinyl chloride (PVC) production by calcium carbide method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203588444U CN203333413U (en) | 2013-06-21 | 2013-06-21 | System for comprehensively utilizing wastewater generated during production of polyvinyl chloride (PVC) production by calcium carbide method |
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| CN203333413U true CN203333413U (en) | 2013-12-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365292A (en) * | 2016-08-30 | 2017-02-01 | 四川龙蟒钛业股份有限公司 | Recycling method of carbide slag slurry supernate |
| CN110898469A (en) * | 2019-11-27 | 2020-03-24 | 宜宾天原集团股份有限公司 | Method for prolonging service life of filter cloth in carbide slag slurry filter pressing process |
| CN113387467A (en) * | 2021-05-14 | 2021-09-14 | 山东科技大学 | Method for treating acidic high-chlorine wastewater by using solid waste in chlor-alkali industry |
| CN113511716A (en) * | 2021-07-12 | 2021-10-19 | 张刚 | Sewage treatment device and method for producing PVC (polyvinyl chloride) by calcium carbide method |
| CN113912234A (en) * | 2021-10-27 | 2022-01-11 | 龙佰禄丰钛业有限公司 | Method for treating sewage generated by producing titanium dioxide by chlorination process |
-
2013
- 2013-06-21 CN CN2013203588444U patent/CN203333413U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365292A (en) * | 2016-08-30 | 2017-02-01 | 四川龙蟒钛业股份有限公司 | Recycling method of carbide slag slurry supernate |
| CN110898469A (en) * | 2019-11-27 | 2020-03-24 | 宜宾天原集团股份有限公司 | Method for prolonging service life of filter cloth in carbide slag slurry filter pressing process |
| CN113387467A (en) * | 2021-05-14 | 2021-09-14 | 山东科技大学 | Method for treating acidic high-chlorine wastewater by using solid waste in chlor-alkali industry |
| CN113511716A (en) * | 2021-07-12 | 2021-10-19 | 张刚 | Sewage treatment device and method for producing PVC (polyvinyl chloride) by calcium carbide method |
| CN113912234A (en) * | 2021-10-27 | 2022-01-11 | 龙佰禄丰钛业有限公司 | Method for treating sewage generated by producing titanium dioxide by chlorination process |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140621 |
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| EXPY | Termination of patent right or utility model |