Catalysis wet-type oxidation treatment method for cyanogen-containing wastewater

A technology that catalyzes wet oxidation and treatment methods, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as secondary pollution, and achieve good technical effects

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, when treating cyanide-containing wastewater, only cyanide is treated but not other organic matter and secondary pollution in the wastewater, and a new catalytic wet oxidation treatment method for cyanide-containing wastewater is provided.

Method used

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  • Catalysis wet-type oxidation treatment method for cyanogen-containing wastewater
  • Catalysis wet-type oxidation treatment method for cyanogen-containing wastewater
  • Catalysis wet-type oxidation treatment method for cyanogen-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0010] 2 g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 30ml water to make solution I, and 98 grams of 20-80 mesh TiO 2 Carrier impregnation solution I, dried at 100°C for 12 hours, and calcined at 600°C for 5 hours to obtain catalyst precursor I; 1.5 g of anhydrous RuCl 3 Dissolved in 30ml of water to form solution II, impregnated solution II with the prepared catalyst precursor I, dried at 80°C for 24 hours, and calcined at 700°C for 4 hours to obtain a catalyst.

[0011] Utilize the above-mentioned prepared catalyst to treat the industrial waste water with 4217mg / l total cyanide and 100769mg / l COD, through a fixed bed reactor, at a reaction temperature of 260°C, a reaction pressure of 7.0Mpa, and a liquid space velocity of 2.0 hours -1 , with air as the reaction gas raw material, under the condition that the volume ratio of gas to liquid is 150:1 under the standard state, the COD removal rate is 97.5%, and the total cyanide is reduced to 2mg / l.

Embodiment 2～17

[0013] The preparation method is the same as in Example 1, only the raw materials, component ratio and preparation conditions are changed. The prepared catalyst is shown in Table 1, and the reaction results are shown in Table 2.

Embodiment 18～26

[0015] The catalyst prepared in Example 5 was adopted, but the reaction conditions were changed, and the specific results are shown in Table 3.

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Abstract

The invention relates to a catalysis wet-type oxidation treatment method for cyanogen-containing wastewater, which is mainly used for solving the problem of incapability of simultaneously treating other organic pollutants in wastewater and secondary pollution during cyanogen-containing wastewater treatment. In the invention, industrial wastewater of which the COD (chemical oxygen demand) value is 2000mg/l to 200000mg/l and the total cyanogen content is 10 to 20000mg/l and gases containing elemental oxygen are taken as raw materials which are in contact with a catalyst under the conditions that the reaction temperature is 230 to 300 DEG C, the reaction pressure is 3 to 10MPa, the liquid space velocity is 0.5-2.5 h<-1> and the volume ratio in a standard state of the gas and liquid materials is (70-300):1 , and therefore, the removal rate of the COD is larger than 95% and the total cyanogen is less than 5 ppm after processed, wherein the catalyst comprises at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2 and at least one metal or oxide carried on the oxide carrier and selected from Pt, Pd, Ru, Ir or Rh in parts by weight. The problem is nicely solved with the technical scheme, and the catalysis wet-type oxidation treatment method for cyanogen-containing wastewater can be used in the industrial treatment of cyanogen-containing industrial wastewater.

Description

technical field [0001] The invention relates to a catalytic wet oxidation treatment method for cyanide-containing wastewater. Background technique [0002] Most cyanides are highly toxic and highly toxic substances. A very small amount of cyanide (a few milligrams per kilogram of body weight will cause people and animals to be poisoned and killed in a short period of time. Water with a very low cyanide concentration (<0.05mg / L) will also cause aquatic organisms such as fish to be poisoned and die, and will also cause crop production reduction. The key to cyanide poisoning is cyanide ion (CN - ) combined with the iron-containing cytochrome oxidase of the cells, so that the cells will lose the ability to take in and utilize oxygen, resulting in inhibition of the respiratory center and death. Therefore, in the process of industrial production, the use and discharge of cyanide must be strictly controlled, especially complete sewage treatment facilities are required to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/18
Inventor 汪国军宋卫林姚全明奚美珍
Owner CHINA PETROLEUM & CHEM CORP
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