Combined treatment method for regenerated high-concentration salt wastewater of sodium ion exchanger

A sodium ion exchanger and combined treatment technology, which is applied in the field of combined treatment of high-concentration salt wastewater regenerated by sodium ion exchangers, can solve the problems of high price, high energy consumption, and unfavorable promotion and use.
CN113105025AActive Publication Date: 2021-07-13北京拓凯化工技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京拓凯化工技术有限公司
Publication Date
2021-07-13

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Abstract

The invention relates to a combined treatment method for regenerated high-concentration salt wastewater of a sodium ion exchanger, wherein the method is used for treating the regenerated high-concentration salt wastewater generated in the regeneration process of the sodium ion exchanger, and magnesium ions are separated by adopting a chemical precipitation method to obtain a magnesium hydroxide product; and calcium chloride and sodium chloride are separated by adopting a nanofiltration method, a calcium chloride solution can be used for spraying sinter ore in a sintering section, and the calcium chloride solution does not need to be evaporated and dried to prepare a solid in the process, so that the energy consumption is reduced. A sodium ion exchanger and a reverse osmosis method are adopted to separate calcium chloride, and sodium chloride is purified and concentrated, so that the obtained sodium chloride solution reaches the standard of a regenerant of the sodium ion exchanger to recycle sodium chloride in wastewater, and reverse osmosis permeate water generates reusable demineralized water; the economic investment is reduced while the regenerated high-concentration salt wastewater is reasonably and efficiently utilized, and the yield and efficiency are increased.
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Description

technical field

[0001] The invention relates to the technical field of industrial wastewater treatment and resource recycling, in particular to a combined treatment method for regenerating high-concentration salt wastewater by sodium ion exchangers in iron and steel enterprises. Background technique

[0002] Iron and steel enterprises need to use a large amount of demineralized water and demineralized water in production. The treatment of high-concentration salt wastewater generated in the process of water production has always been a difficult problem, especially the regeneration of high-concentration salt wastewater by sodium ion exchangers, which is generally done after harmless treatment. Discharged directly, or discharged to a sewage treatment plant, and reused after being treated by the sewage treatment plant, these high-concentration salt wastewater greatly increases the burden of subsequent sewage treatment.

[0003] In industrial enterprises, ion exchange resin rege...

Claims

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