Ion exchange treatment process for cyanide containing wastewater

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

Ion exchange treatment process for cyanide-containing wastewater technical field The invention relates to a wastewater treatment method, in particular to an ion exchange treatment process for cyanide-containing wastewater. Background technique 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 manu...

AI Technical Summary

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

Images