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Ion exchange treatment process for cyanide containing wastewater

An ion exchange method and treatment process technology, which is applied in the field of ion exchange method treatment process of cyanide-containing wastewater, can solve the problems of high treatment cost, low degree of automation, complicated resin regeneration and maintenance operations, etc., and achieves high degree of operation automation, Conducive to recycling, good effect of wastewater treatment

Inactive Publication Date: 2009-02-18
SURFACE & INTERFACE CHEM ENG TECH RES CENT NANJING UNIV
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Problems solved by technology

Ion exchange method is one of the effective methods for treating cyanide-containing wastewater. Compared with other treatment methods, it has the advantages of low treatment cost and recyclable cyanide. However, the current treatment system and process have low automation, resin regeneration and maintenance. Complex operation, not suitable for large-scale wastewater treatment
In addition, because cyanide is highly toxic, it is not suitable to use on-site manual operation
To achieve a good effect on wastewater containing heavy metal complexes, it is necessary to use ion exchange resins treated with cuprous chloride. The treatment cost is high, and more copper ions will be brought into the wastewater. Cyanide wastewater is currently not available for widespread and large-scale application

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  • Ion exchange treatment process for cyanide containing wastewater

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Embodiment 1

[0021] The water quality of cyanide-containing wastewater in an electroplating plant is shown in Table 1:

[0022] Table 1 The maximum content (mg / L) and maximum water volume of cyanide-containing wastewater pollutants

[0023] Wastewater type Water volume (m 3 / d) pH Cr 6+ TCr Cu 2+ Ni 2+ Zn 2+ CN - Cyanide Wastewater 400 1.5～1.8 0.1 20 150 20 20 200

[0024] The effluent requirement after the process of the present invention reaches CN - Concentration 3 / h, the specific equipment and operation are as follows:

[0025] 1. Equipment:

[0026] Cyanide removal ion exchange column: according to the three-column design, the volume of single-column resin is 5m 3 , the resin is D201, the material of the exchange column is glass fiber reinforced plastic, and the height of the resin accounts for 2 / 3 of the height of the whole column. A cyanide online monitor is installed at the total water outlet. The adsorption and regeneration of t...

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Abstract

The invention discloses an ion exchange method treatment technology of the waste water which comprises cyanide. The ion exchange method treatment technology combines the waste water pH value adjustment, absorption, regeneration and maintenance with the recovery of CN<-> ion and hydrochloric acid, realizes ion exchange automatic processing of the CN<-> ion in the waste water which comprises cyanide, has the advantages of high operation automaticity, being safe and reliable, good waste water treatment effect, being capable of recycling the cyanide, low operation cost, effective maintenance to ion exchange resin, long-term and stable working performance and so on. Compared with the chemical method to treat the waste water which comprises cyanide, the ion exchange method treatment technology has the advantages that the ion exchange method treatment technology does not need to add chemical agent in the waste water, has low salt rate in the waste water after being treated, is favor of the recycling of the waste water, and can recycle the cyanide.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to an ion exchange treatment process for cyanide-containing wastewater. Background technique [0002] Cyanide-containing wastewater widely exists in the fields of electroplating and metallurgical production, which not only causes the loss of resources, but also causes serious environmental pollution. Discharge of cyanide-containing wastewater is strictly controlled. Ion exchange method is one of the effective methods to treat cyanide-containing wastewater. Compared with other treatment methods, it has the advantages of low treatment cost and recyclable cyanide. However, the current treatment system and process have low automation, resin regeneration and maintenance. The operation is complicated and not suitable for large-scale wastewater treatment. In addition, because cyanide is highly toxic, it is not suitable to use on-site manual operation. To achieve a good effect on wastewat...

Claims

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Application Information

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IPC IPC(8): C02F1/42C02F1/58C02F103/18B01J47/02
Inventor 郑宏
Owner SURFACE & INTERFACE CHEM ENG TECH RES CENT NANJING UNIV
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