Cleaning treatment technology for isopropyl chloride cyanuric acid production waste water

The technology of chlorinated isocyanuric acid and sodium dichloroisocyanurate is applied in the field of cleaning treatment technology of chlorinated isocyanuric acid production wastewater, which can solve the problems of comprehensive utilization of environmental resources polluted by production wastewater, and achieve comprehensive utilization of resources, Good economic and social benefits

Active Publication Date: 2013-01-30
河北冀衡化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a clean treatment process for chloroisocyanuric acid production wastewater to solve the problem of environmental pollution by production wastewater and the problem of comprehensive utilization of resources

Method used

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  • Cleaning treatment technology for isopropyl chloride cyanuric acid production waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Step A: Send the mother liquor (1) produced by the production of sodium dichloroisocyanurate into the 7000L chlorination reactor (I) at a rate of 5800kg / h through a flowmeter, and simultaneously, according to the content of cyanuric acid and available chlorine in the mother liquor Send the liquid caustic soda (2) of the calculated amount (calculated according to the following formula) into the chlorination reactor (I), turn on the mixer of the chlorination reactor (I), and make the mother liquor (1) and the liquid caustic soda (2) in the chlorination reactor (I) Mix well in the reactor (I), and at the same time, feed frozen brine into the jacket of the reactor (I), and feed chlorine gas (3) or chlorine-containing tail gas from the dechlorination tower through the chlorine pipe and distributor under stirring (10) Keep the reaction solution at a pH of 2.8-3.2, and keep the temperature at 15-25°C for chlorination, and keep a constant liquid level in the reactor (that is, th...

Embodiment 2

[0088] Step A: Send the mother liquor (1) produced by the production of sodium dichloroisocyanurate into the 7000L chlorination reactor (I) at a rate of 5800kg / h through a flowmeter, and simultaneously, according to the content of cyanuric acid and available chlorine in the mother liquor Send the liquid caustic soda (2) of the calculated amount (calculated according to the following formula) into the chlorination reactor (I), turn on the mixer of the chlorination reactor (I), and make the mother liquor (1) and the liquid caustic soda (2) in the chlorination reactor (I) Mix well in the reactor (I), and at the same time, feed frozen brine into the jacket of the reactor (I), and feed chlorine gas (3) or chlorine-containing tail gas from the dechlorination tower through the chlorine pipe and distributor under stirring (10) Keep the reaction solution at a pH of 3.0 to 3.4, and keep the temperature at 5 to 15°C for the chlorination reaction to keep a constant liquid level in the reac...

Embodiment 3

[0098] Step A is the same as in Example 1.

[0099] Step B: Blowing off The dechlorination tower (VI) is a packed tower, and a two-tower series gas-liquid countercurrent blowing off process is adopted. The mother liquor (6) produced by the production of chloroisocyanuric acid is about 20600kg / h and 31% hydrochloric acid (7) 100-140kg / h from the hydrochloric acid head tank are pumped into the static mixer (Ⅲ) for acidification and mixed The pH value of the liquid is maintained at 1 to 2, and the mixed acidified mother liquor (9) in the static mixer (Ⅲ) is blown off from the second dechlorination tower (Ⅵ) at normal temperature 2 ) into the upper part, from its tower (Ⅵ 2 ) The lower part comes out and enters the 2nd tower (Ⅵ 2 ) bottom liquid collection tank, and pump its mother liquor into the first blow off dechlorination tower (Ⅵ 1 ) of the upper part, and then by its tower (Ⅵ 1 ) comes out from the lower part and enters Tower 1 (Ⅵ 1 ) Bottom liquid collection tank. Co...

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Abstract

The invention belongs to the technical field of chemical industry production waste water treatment and discloses cleaning treatment technology for isopropyl chloride cyanuric acid production waste water; a treatment method of this technology comprises the following steps: chloridizing sodium dichloro isocyanurate mother liquor to recycle trichloroisocyanuric acid; acidizing mother liquid, blowing chlorine and by-producing sodium chlorate; alkalifying and reducing the mother liquid so as to recycle cyanuric acid monosodium salt, reducing mother liquid total ammonium; after acidizing the mother liquid, reacting tripolycyanamide with residual cyanuric acid of the mother liquid so as to generate sparingly-soluble melamine cyanurate sediment; separating sediment so as to reduce mother liquid total ammonium; then, absorbing the mother liquid total ammonium by special active carbon so as to further reduce the mother liquid total ammonium; desorbing saturated active carbon by dilute liquid alkali, recycling cyanuric acid trisodium salt; and oxidizing absorbed mother liquid by sodium hypochlorite solution so as to dispel residual cyanuric acid, wherein the total ammonium content of the mother liquid is less than or equal to 2mg / L; treated qualified saline is transferred to a chlor-alkali plant so as to test salt; after tested saline is refined, the tested saline is used for electrolytically producing caustic soda and chorine; isopropyl chloride cyanuric acid is produced again by the caustic soda and the chorine so as to form a circular economic industry chain; and waste water zero emission is realized.

Description

technical field [0001] The invention relates to the technical field of a treatment method for organic chemical production wastewater, in particular to a cleaning treatment process for chlorinated isocyanuric acid production wastewater. Background technique [0002] Chloroisocyanuric acid products are produced from cyanuric acid, caustic soda and chlorine gas as basic raw materials. Chloroisocyanuric acid products mainly include trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanurate and potassium dichloroisocyanurate, among which the manufacturers of trichloroisocyanuric acid and sodium dichloroisocyanurate are the most , and the production volume is also the largest. They are a class of high-efficiency broad-spectrum disinfectants with a wide range of uses. The production process of chloroisocyanuric acid products will produce a large amount of waste water, about 10m3 per ton of product 3 waste water. Wastewater contains dissolved chloroisocyanu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36
Inventor 哀祖仁肖辉柴如行徐永玉常红还
Owner 河北冀衡化学股份有限公司
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