CN102491565B - Method for recovering waste water from sodium dichloroisocyanurate production - Google Patents
Method for recovering waste water from sodium dichloroisocyanurate production Download PDFInfo
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- CN102491565B CN102491565B CN201110445368.5A CN201110445368A CN102491565B CN 102491565 B CN102491565 B CN 102491565B CN 201110445368 A CN201110445368 A CN 201110445368A CN 102491565 B CN102491565 B CN 102491565B
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Abstract
The invention provides a method for recovering waste water from sodium dichloroisocyanurate production, which comprises the following steps: waste water from sodium dichloroisocyanurate production is added with hydrochloric acid for acidifying, then chlorine in the waste water is blown out, active carbon fiber adsorbs cyanuric acid, alkali regenerates active carbon fiber and recovers sodium cyanurate, sodium cyanurate is sent to the sodium dichloroisocyanurate production process, brine is sent to chlor-alkali production process. waste water is subjected to the adsorption treatment, and can be salt-dissolving water in the chlor-alkali production operation for repetitive usage. The active carbon fiber is capable of being regenerated multiple times, the repetitive usage is realized, the cost is low, the method process is simple and the industrial method is easy to realize.
Description
Technical field
The present invention relates to a kind of recovery method of Surchlor GR 60 factory effluent.
Background technology
Surchlor GR 60 is a kind of product of chlor-alkali enterprises, is the organochlorine disinfectant of a kind of broad-spectrum wide spectrum, efficient, low toxicity.This product sprays in crop surface can discharge hypochlorous acid at leisure, by making bacterium protein sex change, changes membrane permeability, and interferases system Physiology and biochemistry the and affect processes such as DNA is synthetic makes pathogenic bacteria death rapidly.This product take its dissolution rate soon and bactericidal property is good, pH is slightly acidic, pungency is little, toxicity is low, shelf-stable is advantage, be rapidly developed in recent years, Food and Drug Administration of the United States Federal (FDA) and Environmental Protection Agency (EPA) all official approval allow it for the disinfection of food and tap water aspect.
Surchlor GR 60 production process produces a large amount of waste water, 1 ton of Surchlor GR 60 of every production produces the waste water of 4 tons of left and right, main component in waste water is: the available chlorine of the sodium-chlor of 7-9%, 0.4% left and right, the cyanuric acid of 0.4% left and right, partly soluble Surchlor GR 60, pH is 2～3 left and right.These waste water because of nitrogen content higher, the about 600mg/L of total nitrogen content, can not as changing salt solution reuse, (changing salt water has relatively high expectations to ammonia nitrogen: inorganic ammonia≤1mg/L; Total ammonia nitrogen≤4mg/L); If directly discharge, wastes a large amount of process waters, on the other hand on the one hand, owing to containing the components such as cyanuric acid, Surchlor GR 60, organochlorine etc. in waste water, the content of organic carbon and ammonia nitrogen is considerably beyond discharging standards, thereby can not directly discharge, and must process.Existing treatment process comprises the techniques such as concentration and evaporation, crystallization, decomposition, absorption, but investment and working cost are all very high.
Summary of the invention
Task of the present invention is: 1. reclaim the cyanuric acid in Surchlor GR 60 factory effluent, 2. waste water conductization salt solution reuse after treatment, avoids discharge, increases economic efficiency, reduces the object of environmental pollution to reach.
A recovery method for Surchlor GR 60 factory effluent, comprises the following steps:
A, waste water, through hcl acidifying, are converted into cyanuric acid and chlorine by Surchlor GR 60;
Chlorine in B, air scavenging waste water, chlorine enters alkali absorption tower and generates rare clorox;
C, waste water enter activated carbon fiber post and carry out dynamic adsorption;
D, alkali regenerated carbon fiber reclaim cyanuric acid simultaneously;
The cyanuric acid of E, recovery goes Surchlor GR 60 production process;
F, brackish water dechlorination alkali production process are used as changing salt solution.
Foregoing recovery method, preferred scheme is, and in described steps A, the add-on of hydrochloric acid is waste water 0.5～5%, and more preferably, the add-on of hydrochloric acid is waste water 1～2%.
Foregoing recovery method, preferred scheme is that the alkali in described step B, D is sodium hydroxide, sodium carbonate or potassium hydroxide, in B, the concentration of alkali is that the concentration of alkali in 5～20%, D is 3～10%, more preferably, in B, the concentration of alkali is that the concentration of alkali in 10～15%, D is 5～8%.
Foregoing recovery method, preferably scheme is, and the aspect ratio of the activated carbon fiber post in described step C is 5: 1～30: 1, and service temperature is 5～50 ℃, and absorption and elution flow rate are 0.5～2.5BV.
Technical superiority of the present invention shows:
1. the solute in Surchlor GR 60 factory effluent all reclaims, and does not have waste liquid to discharge, and does not produce secondary pollution.
2. waste water, after adsorption treatment, is reused as the change salt solution of chlor-alkali production operation.
3. activated carbon fiber can repeatedly be regenerated, and reuses, and cost is lower.
4. technique is simple, industrial easy realization.
Accompanying drawing explanation
Fig. 1 is the processing technological flow of Surchlor GR 60 factory effluent.
Embodiment
Below in conjunction with embodiment, describe the solution of the present invention in detail, but protection domain is not by this restriction.
Embodiment 1 hcl acidifying Surchlor GR 60 factory effluent, the add-on of hydrochloric acid is waste water 1%, with the chlorine in air scavenging waste water, air enters from tower reactor, overhead extraction, waste water adds from tower top, tower reactor extraction.The chlorine of tower top enters alkali absorption tower and is absorbed, the sodium hydroxide that the alkali lye in alkali absorption tower is 10%.The waste water of tower reactor enters carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of activated carbon fiber post is 10: 1, and service temperature is normal temperature, and waste water flow velocity is 1BV.From fibre columns, in water out, total ammonia nitrogen content is 3.0mg/L, and NaCl content is 8.5%, and this aqueous solution is delivered to chlorine alkali workshop and continued to use as changing salt solution.The NaOH regeneration of waste liquor that adsorbs saturated active carbon fibre Wesy 5%, the NaDCC after regeneration is delivered to Surchlor GR 60 production process, as Surchlor GR 60 raw materials for production.
Embodiment 2 is with 2% hcl acidifying Surchlor GR 60 factory effluent, and with the chlorine in air scavenging waste water, air enters from tower reactor, overhead extraction, and waste water adds from tower top, tower reactor extraction.The chlorine of tower top enters alkali absorption tower and is absorbed, the sodium hydroxide that the alkali lye in alkali absorption tower is 15%.The waste water of tower reactor enters carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of activated carbon fiber post is 15: 1, and service temperature is 30 ℃, and waste water flow velocity is 1.5BV.From fibre columns, in water out, total ammonia nitrogen content is 3.2mg/L, and NaCl content is 8.8%, and this aqueous solution is delivered to chlorine alkali workshop and continued to use as changing salt solution.The NaOH regeneration of waste liquor that adsorbs saturated active carbon fibre Wesy 6%, the NaDCC after regeneration is delivered to Surchlor GR 60 production process, as Surchlor GR 60 raw materials for production.
Embodiment 3 is with 5% hcl acidifying Surchlor GR 60 factory effluent, and with the chlorine in air scavenging waste water, air enters from tower reactor, overhead extraction, and waste water adds from tower top, tower reactor extraction.The chlorine of tower top enters alkali absorption tower and is absorbed, the potassium hydroxide that the alkali lye in alkali absorption tower is 10%.The waste water of tower reactor enters carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of activated carbon fiber post is 20: 1, and service temperature is 30 ℃, and waste water flow velocity is 2.0BV.From fibre columns, in water out, total ammonia nitrogen content is 3.1mg/L, and NaCl content is 8.7%, and this aqueous solution is delivered to chlorine alkali workshop and continued to use as changing salt solution.The potassium hydroxide solution regeneration of adsorbing saturated active carbon fibre Wesy 8%, the NaDCC after regeneration is delivered to Surchlor GR 60 production process, as Surchlor GR 60 raw materials for production.
Claims (1)
1. a recovery method for Surchlor GR 60 factory effluent, is characterized in that, comprises the following steps:
A, waste water, through hcl acidifying, are converted into cyanuric acid and chlorine by Surchlor GR 60, and the add-on of hydrochloric acid used is wastewater quality 1～2%;
Chlorine in B, use air scavenging waste water, air enters from tower reactor, overhead extraction, waste water adds from tower top, tower reactor extraction, the chlorine of overhead extraction enters alkali absorption tower and absorbs, and the concentration of controlling alkali in alkali absorption tower is 10～15%;
The waste water of C, tower reactor extraction enters activated carbon fiber post and carries out dynamic adsorption, and the aspect ratio of activated carbon fiber post used is 5:1～30:1, and service temperature is 5～50 ℃, and absorption and elution flow rate are 0.5～2.5BV;
D, alkali regenerated carbon fiber, the NaDCC after reclaiming goes Surchlor GR 60 production process, and brackish water dechlorination alkali production process is used as changing salt solution, and the concentration of alkali used is 5～8%;
Alkali used is sodium hydroxide, sodium carbonate or potassium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110445368.5A CN102491565B (en) | 2011-12-28 | 2011-12-28 | Method for recovering waste water from sodium dichloroisocyanurate production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110445368.5A CN102491565B (en) | 2011-12-28 | 2011-12-28 | Method for recovering waste water from sodium dichloroisocyanurate production |
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| CN102491565A CN102491565A (en) | 2012-06-13 |
| CN102491565B true CN102491565B (en) | 2014-02-19 |
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| CN102897948B (en) * | 2012-10-15 | 2013-12-25 | 河北冀衡化学股份有限公司 | Cleaning treatment technology for isopropyl chloride cyanuric acid production waste water |
| ES2680486B2 (en) * | 2017-02-27 | 2019-05-06 | Diasa Ind S A | PROCEDURE AND SYSTEM FOR THE EXTRACTION OF ISOCIANURIC ACID IN DISSOLUTION |
| CN109651277B (en) * | 2019-01-29 | 2024-04-12 | 河北兴飞化工有限公司 | Method and system for recycling cyanuric acid in dichloro mother liquor |
| CN113200643A (en) * | 2021-04-13 | 2021-08-03 | 子赫科技湖北有限公司 | Process for realizing near-zero discharge of trichloroisocyanuric acid production wastewater |
| CN114436982A (en) * | 2022-01-24 | 2022-05-06 | 河北六合化工有限公司 | Method for recovering waste water from sodium dichloroisocyanurate production |
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| CN1201762A (en) * | 1998-05-29 | 1998-12-16 | 吴位能 | Quick effective water depositting and disinfecting agent |
| CN1394820A (en) * | 2001-11-23 | 2003-02-05 | 广西南宁科林特技术工程有限公司 | Method for treating waste water produced by chloro-isocyanuric acid production |
| US7625496B2 (en) * | 2006-11-03 | 2009-12-01 | Chemtura Corporation | Solid composition for treating water |
| CN100494097C (en) * | 2006-11-06 | 2009-06-03 | 诸城泰盛化工有限公司 | Method for treating wastewater from production of chlorated fulminuric acid |
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