CN103011450A - Treatment method for chlor-alkali industry wastewater - Google Patents
Treatment method for chlor-alkali industry wastewater Download PDFInfo
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- CN103011450A CN103011450A CN2012105207432A CN201210520743A CN103011450A CN 103011450 A CN103011450 A CN 103011450A CN 2012105207432 A CN2012105207432 A CN 2012105207432A CN 201210520743 A CN201210520743 A CN 201210520743A CN 103011450 A CN103011450 A CN 103011450A
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Abstract
The invention discloses a treatment method for chlor-alkali industry wastewater. The method comprises the following steps: neutralizing industrial wastewater containing chlor-alkali with calcium hydrate at a temperature of 50 to 90 DEG C and subjecting the neutralized industrial wastewater to flocculation and then to filtration to remove impurities therein; and adjusting the pH value of a solution obtained after filtration so as to allow obtained industrial wastewater containing chlor-alkali to reach discharge standard. The treatment method provided by the invention has the advantages of easy availability of raw materials, low cost, a simple process, easy and convenient operation and good environmental protection and economic benefits.
Description
Technical field
The present invention discloses a kind for the treatment of process of chlor-alkali industrial waste water, belongs to sewage treatment area.
Background technology
Chlorine industry is one of the most basic chemical industry, polyvinyl chloride (PVC) RESINS, caustic soda, hydrochloric acid.The chlorine-alkali products such as liquid chlorine all are national economy and the requisite material of people's lives, occupy critical role in national economy and national defense construction, but the chlor-alkali industry environmental pollution also is larger simultaneously.Along with the enhancing of people's environmental protection consciousness, pollution of being caused in take chlorine industry as the chemical process on basis and products thereof is more and more paid attention to the impact that environment causes.Therefore, give full play to chlorine industry and take chlorine industry as the basis the effect of Chemical Manufacture in the national economic development in, should reduce it to the disadvantageous effect of environment as far as possible.In chlorine industry, can produce the alkaline waste water that contains in a large number sodium peroxide; Sodium peroxide is also used in a large number as SYNTHETIC OPTICAL WHITNER and sterilizing agent, also contains a large amount of chlorine residue in the waste water of discharge.The discharging of being rich in sodium peroxide waste water has not only caused a large amount of wastes of water resources, and environment and human lives have also been caused very large harm.Therefore, the discharging that contains the alkaline waste water of sodium peroxide has been subject to strict control.Catalytic oxidation is the state-of-the-art technology of chemical field and a kind of efficient oxidation technology that corresponding efficient surface catalyzer combines, and is the excellent means of processing wastewater of chemical industry with high concentration.The catalyzed oxidation nature of law is exactly that catalyzer is to the decomposition generation katalysis of oxygenant, the chemical reaction between quickening Organic Pollutants in Wastewater and the oxygenant.Catalytic oxidation can reduce the chemical oxygen demand of waste water, improve the biodegradability of waste water, and cost is lower, has good industrial prospect.
Summary of the invention
The object of the present invention is to provide a kind of biodegradability that improves waste water, and cost is lower, has the treatment process of a kind of chlor-alkali industrial waste water of good industrial prospect.
The present invention adopts following technical proposals: concrete steps of the present invention:
(1) under 50-90 ℃ temperature, use the trade effluent that calcium hydroxide will contain chlor-alkali to neutralize;
(2) flocculation adds polyacrylamide and carry out flocculation sediment in chloride alkali waste water;
(3) filter, remove impurity wherein;
(4) again regulate the pH value of filtering rear solution, make the trade effluent that contains chlor-alkali of generation reach the standard that to discharge.
The acidity of solution was not less than 8.0 after described adjusting was filtered.
Be not less than 8.5 with rear pH value in the described chlor-alkali industrial waste water, the reaction times is not less than 1 hour, and the COD value in the chlor-alkali industrial waste water of processing is 8000～10000mg/L.
Application method of the present invention:
(1) gets the trade effluent 2509ml of chloride 6000-9550ppm;
(2) under 50-90 ℃ temperature, the trade effluent that adding 180-230mg calcium hydroxide will contain chlor-alkali neutralizes stirring reaction 0.5h-1h;
(3) flocculation adds polyacrylamide and carry out flocculation sediment in chloride alkali waste water;
(4) obtain the slip that pH is 8.5-9.5, remove filter residue after the filtration, cl content gets final product in the analysis filtrate.
Advantageous characteristic of the present invention is: the inventive method raw material is easy to get, with low cost, technique is simple, easy and simple to handle, have good environmental benefit and economic benefit.
Specific examples
Example 1:
(1) gets the trade effluent 2509ml of chloride 9550ppm;
(2) under 50 ℃ temperature, the trade effluent that adding 215mg calcium hydroxide will contain chlor-alkali neutralizes stirring reaction 0.5h;
(3) pH is 8.5 slip;
(4) remove filter residue after the filtration, analyze cl concentration in the filtrate, content cl=9.13ppm, the trade effluent that contains chlor-alkali of generation reaches the standard that can discharge.
Example 2:
(1) gets the trade effluent 2509ml of chloride 7000ppm;
(2) under 80 ℃ temperature, the trade effluent that adding 180mg calcium hydroxide will contain chlor-alkali neutralizes stirring reaction 1h;
(3) pH is 9.0 slip;
(4) remove filter residue after the filtration, analyze cl concentration in the filtrate, content cl=8.72ppm, the trade effluent that contains chlor-alkali of generation reaches the standard that can discharge.
Example 3:
(1) get the trade effluent 2509ml of chloride 9150ppm,
(2) under 60 ℃ temperature, the trade effluent that adding 230mg calcium hydroxide will contain chlor-alkali neutralizes stirring reaction 0.8h;
(3) pH is 9.5 slip;
(4) remove filter residue after the filtration, analyze cl concentration in the filtrate, content cl=8.11ppm, the trade effluent that contains chlor-alkali of generation reaches the standard that can discharge.
Claims (4)
1. the treatment process of a chlor-alkali industrial waste water is characterized in that: the concrete steps of the method:
(1) under 50-90 ℃ temperature, use the trade effluent that calcium hydroxide will contain chlor-alkali to neutralize;
(2) flocculation adds polyacrylamide and carry out flocculation sediment in chloride alkali waste water;
(3) filter, remove impurity wherein;
(4) again regulate the pH value of filtering rear solution, make the trade effluent that contains chlor-alkali of generation reach the standard that to discharge.
2. the treatment process of a kind of chlor-alkali industrial waste water according to claim 1 is characterized in that: regulate the acidity of filtering rear solution and be not less than 8.0.
3. the treatment process of a kind of chlor-alkali industrial waste water according to claim 1 is characterized in that: will be in the chlor-alkali industrial waste water and rear pH value be not less than 8.5, the reaction times is not less than 1 hour.
4. the treatment process of a kind of chlor-alkali industrial waste water according to claim 1, it is characterized in that: the COD value in the handled chlor-alkali industrial waste water is 8000～10000mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105207432A CN103011450A (en) | 2012-11-27 | 2012-11-27 | Treatment method for chlor-alkali industry wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105207432A CN103011450A (en) | 2012-11-27 | 2012-11-27 | Treatment method for chlor-alkali industry wastewater |
Publications (1)
| Publication Number | Publication Date |
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| CN103011450A true CN103011450A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105207432A Pending CN103011450A (en) | 2012-11-27 | 2012-11-27 | Treatment method for chlor-alkali industry wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417669A (en) * | 2015-12-29 | 2016-03-23 | 河南永银化工实业有限公司 | Chlor alkali production waste acid recycling method |
| CN108641677A (en) * | 2018-04-20 | 2018-10-12 | 刘凡领 | A kind of preparation method of the anti-sticking aircraft deicing anti-freeze fluid of low temperature |
| CN111112290A (en) * | 2019-12-20 | 2020-05-08 | 浙江巨化技术中心有限公司 | Dechlorination method for chlorinated hydrocarbon waste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101462815A (en) * | 2009-01-16 | 2009-06-24 | 天津威德泰科石化科技发展有限公司 | Method for treating centrifuge mother liquor wastewater from polychloroethylene production |
| CN201882988U (en) * | 2010-11-11 | 2011-06-29 | 广州市浩蓝环保工程有限公司 | Treatment and recycling system for chemical chlor-alkali waste water |
| CN102701496A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method and process for treating high-concentration organic wastewater difficult to degrade |
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2012
- 2012-11-27 CN CN2012105207432A patent/CN103011450A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101462815A (en) * | 2009-01-16 | 2009-06-24 | 天津威德泰科石化科技发展有限公司 | Method for treating centrifuge mother liquor wastewater from polychloroethylene production |
| CN201882988U (en) * | 2010-11-11 | 2011-06-29 | 广州市浩蓝环保工程有限公司 | Treatment and recycling system for chemical chlor-alkali waste water |
| CN102701496A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method and process for treating high-concentration organic wastewater difficult to degrade |
Non-Patent Citations (3)
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| 山东新龙集团: "聚氯乙烯聚合母液水综合处理回收利用技术", 《江苏氯碱》 * |
| 薛卫东等: "氯碱化工废水综合利用", 《中国氯碱》 * |
| 黄雅婧: "氯碱化工综合废水处理及回用的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417669A (en) * | 2015-12-29 | 2016-03-23 | 河南永银化工实业有限公司 | Chlor alkali production waste acid recycling method |
| CN108641677A (en) * | 2018-04-20 | 2018-10-12 | 刘凡领 | A kind of preparation method of the anti-sticking aircraft deicing anti-freeze fluid of low temperature |
| CN111112290A (en) * | 2019-12-20 | 2020-05-08 | 浙江巨化技术中心有限公司 | Dechlorination method for chlorinated hydrocarbon waste |
| CN111112290B (en) * | 2019-12-20 | 2021-06-04 | 浙江巨化技术中心有限公司 | Dechlorination method for chlorinated hydrocarbon waste |
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Application publication date: 20130403 |