Strong brine resource utilization device in non-ferrous metal smelting industry

Abstract

The invention belongs to the technical field of sewage and wastewater treatment, and particularly relates to a strong brine resource utilization device in the non-ferrous metal smelting industry, which comprises a fluorine removal device, a calcium removal device, an electrodialysis concentration device, a chlorine removal device and a bipolar membrane acid and alkali production device. Aiming atthe water quality characteristics of the strong brine in the non-ferrous metal smelting industry, the pretreatment processes of fluorine removal, calcium removal, concentration and chlorine removal are sequentially carried out, so that the treatment process can be stably operated, the content of acid-base impurities in the treated strong brine is low, and the treated strong brine has recycling value and can be directly recycled.

Description

technical field [0001] The invention belongs to the technical field of sewage and wastewater treatment, and in particular relates to a resource utilization device for concentrated brine in the nonferrous metal smelting industry, which is used for the resource utilization of concentrated brine in nonferrous metal smelting and other industries, and is especially suitable for resource utilization of concentrated brine after reverse osmosis concentration change. Background technique [0002] At present, most non-ferrous smelting enterprises are required to "zero discharge" of heavy metal wastewater, and usually use chemical hard removal + membrane desalination + concentrated water evaporation crystallization process. The process has the following problems: ① A large amount of heavy metal-containing miscellaneous salts are produced, which cannot be used and can only be stored as hazardous waste, which is likely to cause serious secondary pollution; ② The cost of treatment is high...

AI Technical Summary

Problems solved by technology

The process has the following problems: ① A large amount of heavy metal-containing miscellaneous salts are produced, which cannot be used and can only be stored as hazardous waste, which is likely to cause serious secondary pollution; ② The cost of treatment is high, which is unbearable for enterprises

Chinese patent application CN107176730A discloses a high-salt wastewater resource treatment process in the rare earth industry. This device is aimed at the resource recovery of high-salt wastewater in the rare earth industry, considering the removal of ammonia nitrogen, but the patent does not remove fluorine and chlorine.

[0003] Therefore, the use of conventional advanced treatment resource technology can no longer meet the increasingly stringent environmental protection requirements, and it is urgent to develop a new device for resource utilization of concentrated brine in the non-ferrous metal smelting industry to ensure that the requirements of resource application are met.

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