CN102491565A - 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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- CN102491565A CN102491565A CN2011104453685A CN201110445368A CN102491565A CN 102491565 A CN102491565 A CN 102491565A CN 2011104453685 A CN2011104453685 A CN 2011104453685A CN 201110445368 A CN201110445368 A CN 201110445368A CN 102491565 A CN102491565 A CN 102491565A
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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 enterprise, 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, through making the bacterium protein sex change, changes membrane permeability, and interferases system Physiology and biochemistry and influence processes such as DNA is synthetic makes pathogenic bacteria death rapidly.This product is so that its dissolution rate is fast and bactericidal property is good, pH is slightly acidic, pungency is little, toxicity is low, shelf-stable is advantage; Obtain fast development in recent years, Food and Drug Administration of the United States Federal (FDA) and Environmental Protection Agency (EPA) all official approval allow it to be used for the disinfection of food and tap water aspect.
The Surchlor GR 60 production process produces great amount of wastewater; 1 ton of Surchlor GR 60 of every production produces about 4 tons waste water; Staple in the waste water is: the sodium-chlor of 7-9%, about 0.4% available chlorine, about 0.4% cyanuric acid, partly soluble Surchlor GR 60, the pH value of solution value is about 2～3.These waste water are higher because of nitrogen content, and the about 600mg/L of total nitrogen content can not (changing the salt water has relatively high expectations to ammonia nitrogen: inorganic ammonia≤1mg/L as changing the salt solution reuse; Total ammonia nitrogen≤4mg/L); If directly discharging is wasted a large amount of process waters, on the other hand on the one hand; Owing to contain components such as cyanuric acid, Surchlor GR 60, organochlorine etc. in the waste water; Organic carbon and ammonia nitrogen content be considerably beyond discharging standards, thereby can not directly discharge, and must handle.Existing treatment process comprises technologies 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 the Surchlor GR 60 factory effluent, discharging is avoided in 2. waste water conductization salt solution reuse after treatment, increases economic efficiency, reduces the purpose of environmental pollution to reach.
A kind of recovery method of Surchlor GR 60 factory effluent may further comprise the steps:
A, waste water are converted into cyanuric acid and chlorine through hcl acidifying with Surchlor GR 60;
Chlorine in B, the air scavenging waste water, chlorine gets into the alkali absorption tower and generates rare Youxiaolin;
C, waste water get into the NACF post and carry out dynamic adsorption;
D, alkali regenerated carbon fiber reclaim cyanuric acid simultaneously;
The cyanuric acid of E, recovery goes the Surchlor GR 60 production process;
F, brackish water dechlorination alkali production process are used as changing salt solution.
Foregoing recovery method, preferably scheme is, and the add-on of hydrochloric acid is 0.5～5% of a waste water in the said steps A, and more preferably, the add-on of hydrochloric acid is 1～2% of a waste water.
Foregoing recovery method, preferred scheme is that the alkali among said step B, the D is sodium hydroxide, yellow soda ash or Pottasium Hydroxide; The concentration of alkali is 5～20% among the B, and the concentration of alkali is 3～10% among the D, more preferably; The concentration of alkali is 10～15% among the B, and the concentration of alkali is 5～8% among the D.
Foregoing recovery method, preferably scheme is, and the aspect ratio of the NACF post among the said 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 the Surchlor GR 60 factory effluent all reclaims, and does not have waste liquid to discharge, and does not produce secondary pollution.
2. waste water is reused as the change salt solution of chlor-alkali production operation through after the adsorption treatment.
3. NACF can repeatedly be regenerated, and reuses, and cost is lower.
4. technology is simple, realizes easily in the industry.
Description of drawings
Fig. 1 is the processing technological flow of Surchlor GR 60 factory effluent.
Embodiment
Specify scheme of the present invention below in conjunction with embodiment, but protection domain is not by this restriction.
Embodiment 1 hcl acidifying Surchlor GR 60 factory effluent, the add-on of hydrochloric acid is 1% of a waste water, with the chlorine in the air scavenging waste water, air gets into from the tower still, the cat head extraction, waste water adds from cat head, the extraction of tower still.The chlorine of cat head gets into the alkali absorption tower and is absorbed, and the alkali lye in the alkali absorption tower is 10% sodium hydroxide.The waste water of tower still gets into the carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of NACF post is 10: 1, and service temperature is a normal temperature, and the waste water flow velocity is 1BV.Total ammonia nitrogen content is 3.0mg/L in the water that from fibre columns, comes out, and NaCl content is 8.5%, and this aqueous solution is delivered to the chlor-alkali workshop and continued to use as changing salt solution.Adsorb the NaOH solution regeneration of saturated active carbon fibre Wesy 5%, the NaDCC after the regeneration is delivered to the Surchlor GR 60 production process, as the Surchlor GR 60 raw materials for production.
Embodiment 2 is with 2% hcl acidifying Surchlor GR 60 factory effluent, and with the chlorine in the air scavenging waste water, air gets into from the tower still, the cat head extraction, and waste water adds from cat head, the extraction of tower still.The chlorine of cat head gets into the alkali absorption tower and is absorbed, and the alkali lye in the alkali absorption tower is 15% sodium hydroxide.The waste water of tower still gets into the carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of NACF post is 15: 1, and service temperature is 30 ℃, and the waste water flow velocity is 1.5BV.Total ammonia nitrogen content is 3.2mg/L in the water that from fibre columns, comes out, and NaCl content is 8.8%, and this aqueous solution is delivered to the chlor-alkali workshop and continued to use as changing salt solution.Adsorb the NaOH solution regeneration of saturated active carbon fibre Wesy 6%, the NaDCC after the regeneration is delivered to the Surchlor GR 60 production process, as the Surchlor GR 60 raw materials for production.
Embodiment 3 is with 5% hcl acidifying Surchlor GR 60 factory effluent, and with the chlorine in the air scavenging waste water, air gets into from the tower still, the cat head extraction, and waste water adds from cat head, the extraction of tower still.The chlorine of cat head gets into the alkali absorption tower and is absorbed, and the alkali lye in the alkali absorption tower is 10% Pottasium Hydroxide.The waste water of tower still gets into the carbon fiber adsorption and catalytic combustion post and carries out dynamic adsorption, and the aspect ratio of NACF post is 20: 1, and service temperature is 30 ℃, and the waste water flow velocity is 2.0BV.Total ammonia nitrogen content is 3.1mg/L in the water that from fibre columns, comes out, and NaCl content is 8.7%, and this aqueous solution is delivered to the chlor-alkali workshop and continued to use as changing salt solution.Adsorb the potassium hydroxide solution regeneration of saturated active carbon fibre Wesy 8%, the NaDCC after the regeneration is delivered to the Surchlor GR 60 production process, as the Surchlor GR 60 raw materials for production.
Claims (9)
1. the recovery method of a Surchlor GR 60 factory effluent is characterized in that, may further comprise the steps:
A, waste water are converted into cyanuric acid and chlorine through hcl acidifying with Surchlor GR 60;
Chlorine in B, the air scavenging waste water, chlorine gets into the alkali absorption tower and generates rare Youxiaolin;
C, waste water get into the NACF post and carry out dynamic adsorption;
D, alkali regenerated carbon fiber reclaim cyanuric acid simultaneously;
The cyanuric acid of E, recovery goes the Surchlor GR 60 production process;
F, brackish water dechlorination alkali production process are used as changing salt solution.
2. recovery method according to claim 1 is characterized in that, the add-on of hydrochloric acid is 0.5～5% of a wastewater quality.
3. recovery method according to claim 2 is characterized in that, the add-on of hydrochloric acid is 1～2% of a wastewater quality.
4. recovery method according to claim 1 is characterized in that, air gets into from the tower still, the cat head extraction, and waste water adds from cat head, the extraction of tower still.
5. recovery method according to claim 1 is characterized in that, used alkali is sodium hydroxide, yellow soda ash or Pottasium Hydroxide.
6. according to claim 1 or 5 described recovery methods, it is characterized in that the concentration of control alkali is 5～20% among the step B, the concentration of control alkali is 3～10% among the step D.
7. recovery method according to claim 6 is characterized in that, the concentration of control alkali is 10～15% among the step B, and the concentration of control alkali is 5～8% among the step D.
8. recovery method according to claim 1 is characterized in that, the aspect ratio of NACF post is 5: 1～30: 1, and service temperature is 5～50 ℃, and absorption and elution flow rate are 0.5～2.5BV.
9. recovery method according to claim 8 is characterized in that, the aspect ratio of NACF post is 20: 1, and service temperature is 30 ℃, and absorption and elution flow rate are 2.0BV.
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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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| CN201110445368.5A CN102491565B (en) | 2011-12-28 | 2011-12-28 | Method for recovering waste water from sodium dichloroisocyanurate production |
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| CN102491565B CN102491565B (en) | 2014-02-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897948A (en) * | 2012-10-15 | 2013-01-30 | 河北冀衡化学股份有限公司 | Cleaning treatment technology for isopropyl chloride cyanuric acid production waste water |
| ES2680486A1 (en) * | 2017-02-27 | 2018-09-07 | Diasa Industrial, S.A. | PROCEDURE AND SYSTEM FOR THE EXTRACTION OF ISOCIANUCIAN ACID IN DISSOLUTION (Machine-translation by Google Translate, not legally binding) |
| CN109651277A (en) * | 2019-01-29 | 2019-04-19 | 河北兴飞化工有限公司 | Cyanuric acid recovery method and system 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-acting water clarifying disinfectant |
| 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 |
| CN1958482A (en) * | 2006-11-06 | 2007-05-09 | 诸城泰盛化工有限公司 | Method for treating wastewater from production of chlorated fulminuric acid |
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2011
- 2011-12-28 CN CN201110445368.5A patent/CN102491565B/en not_active Expired - Fee Related
Patent Citations (4)
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| CN1201762A (en) * | 1998-05-29 | 1998-12-16 | 吴位能 | Quick-acting water clarifying disinfectant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897948A (en) * | 2012-10-15 | 2013-01-30 | 河北冀衡化学股份有限公司 | Cleaning treatment technology for isopropyl chloride cyanuric acid production waste water |
| 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 |
| ES2680486A1 (en) * | 2017-02-27 | 2018-09-07 | Diasa Industrial, S.A. | PROCEDURE AND SYSTEM FOR THE EXTRACTION OF ISOCIANUCIAN ACID IN DISSOLUTION (Machine-translation by Google Translate, not legally binding) |
| CN109651277A (en) * | 2019-01-29 | 2019-04-19 | 河北兴飞化工有限公司 | Cyanuric acid recovery method and system in dichloro mother liquor |
| 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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| CN102491565B (en) | 2014-02-19 |
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