Cyanogen removing agent and preparation method and application thereof

A technology of activated carbon and polymerized ferric sulfate, which is used in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. problem, to achieve the effect of enhancing the cyanide removal effect, increasing the flocculation speed and the sedimentation speed.

Inactive Publication Date: 2020-02-07
SHAANXI YUTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a cyanide removal agent and its preparation method and application to solve the problems

Method used

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preparation example Construction

[0022] The present invention also provides a kind of preparation method of cyanide removal agent, and active carbon, FeSO 4 ·7H 2 O, polyferric sulfate, polyaluminum chloride, SnCl 4 、CuSO 4 ·5H 2 O, Co(NO 3 ) 2 ·6H 2 O, polyacrylamide, CaCl 2 and kaolin, after mixing according to the above composition ratio, stirring at room temperature until uniformly mixed, the stirring speed is 2000-3000r / min, and the stirring time is 10-15min, and the cyanide removal agent is prepared.

[0023] The present invention also provides an application of a cyanide removal agent in the treatment of coking wastewater. Specifically, the cyanide removal agent is mixed with water in a mass ratio of 1:(3-4), and the cyanide removal agent is prepared Aqueous solution: add the aqueous solution of cyanide removal agent to the biochemical raw water after biochemical treatment, stir at 20-35°C for 5-20 minutes, and then let it stand for 5-20 minutes to obtain the supernatant, which can realize the r...

Embodiment 1

[0025] A kind of cyanide removal agent described in embodiment 1, by mass fraction, comprises a kind of cyanide removal agent provided by the present invention, by mass fraction, comprises activated carbon: 15%, FeSO 4 ·7H 2 O: 12%, polyferric sulfate: 30%, polyaluminum chloride: 12%, SnCl 4 : 6%, CuSO 4 ·5H 2 O: 5%, Co(NO 3 ) 2 ·6H 2 O: 7%, polyacrylamide: 5%, CaCl 2 : 3% and kaolin: 5%; Among them, the mesh number of activated carbon is 200-300 mesh, the iodine adsorption value of activated carbon is ≥800mg / g, the moisture content is ≤10%, and the ash content is ≤7%; the mesh number of polyferric sulfate is 80- 100 mesh, the mass percentage of ferric sulfate in polyferric sulfate is 20%-22%; the mesh number of polyaluminum chloride is 50-80 mesh, the Al in polyaluminum chloride 2 o 3 The mass percentage is 27-28%.

[0026] The present invention also provides a kind of preparation method of cyanide removal agent, and active carbon, FeSO 4 ·7H 2 O, polyferric sulfate,...

Embodiment 2

[0032] Embodiment 2 provides a kind of cyanide removal agent, by mass fraction, comprises, gac: 10%, FeSO 4 ·7H 2 O: 10%, polyferric sulfate: 20%, polyaluminum chloride: 20%, SnCl 4 : 10%, CuSO 4 ·5H 2 O: 10%, Co(NO 3 ) 2 ·6H 2 O: 10% and polyacrylamide: 10%; Among them, the mesh number of activated carbon is 200-300 mesh, the iodine adsorption value of activated carbon is ≥800mg / g, the moisture content is ≤10%, and the ash content is ≤7%; the mesh number of polyferric sulfate 80-100 mesh, the mass percentage of ferric sulfate in polyferric sulfate is 20%-22%; the mesh of polyaluminum chloride is 50-80 mesh, the Al in polyaluminum chloride 2 o 3 The mass percentage is 27-28%.

[0033] The present invention also provides a kind of preparation method of cyanide removal agent, and active carbon, FeSO 4 ·7H 2 O, polyferric sulfate, polyaluminum chloride, SnCl 4 、CuSO 4 ·5H 2 O, Co(NO 3 ) 2 ·6H 2 O and polyacrylamide, the above ingredients were mixed in proportion, ...

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Abstract

The invention provides a cyanogen removing agent and a preparation method and application thereof. The cyanogen removing agent is prepared from activated carbon, FeSO4.7H2O, polymeric ferric sulfate,polymeric aluminum chloride, SnCl4, CuSO4.5H2O, Co(NO3)2.6H2O and polyacrylamide. The FeSO4.7H2O and the polymeric ferric sulfate have a good flocculation effect in water; the SnCl4, the CuSO4.5H2O and the Co(NO3)2.6H2O are heavy metallic salts and can be subjected to complexing with inorganic cyanide in coking wastewater to form a strong complexing compound; through the synergistic effect of thepolymeric aluminum chloride and the polyacrylamide, the flocculation speed of the coking wastewater is increased, and the sedimentation time is effectively shortened; by adopting the activated carbon,the adsorbing effect on organic substances such as pigment in the coking wastewater is achieved, after the activated carbon is compounded with a ferric salt and heavy metallic salts, cyanide not being subjected to complexing is adsorbed, and the cyanogen removing effect is enhanced; and according to the cyanogen removing agent, adopted raw materials are low in cost and wide in obtaining path, andmeanwhile, the cyanogen removing agent has the advantages that the medicine putting amount is small, effect taking is quick, the cyanogen removing effect is significant, and the sedimentation speed is high.

Description

technical field [0001] The invention relates to the technical field of coking wastewater treatment, in particular to a cyanide removal agent and its preparation method and application. Background technique [0002] Coking wastewater is a kind of organic wastewater containing phenol, cyanide, oil, ammonia and other pollutants produced by coking plants, which has the characteristics of large discharge, strong toxicity and refractory degradation. At present, the three-step method of pretreatment-biochemical treatment-post-treatment is generally used for purification of coking wastewater. Pretreatment mainly removes most oils and phenols, and biochemical treatment mainly removes ammonia nitrogen and COD in wastewater; the total cyanide in the effluent after pretreatment and biochemical treatment is 3-5mg / L; The removal of cyanide has the disadvantages of large amount of feed, low treatment efficiency, high concentration of pollutants in the effluent, and failure to meet the dis...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/28C02F1/52C02F1/56C02F101/18C02F103/34
CPCC02F1/00C02F1/283C02F1/5236C02F1/56C02F2101/18C02F2103/34
Inventor 陈力群
Owner SHAANXI YUTENG IND
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