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Industrial strong brine zero discharge treatment system and method

The technology of a treatment system and a treatment method, which is applied in the field of industrial concentrated brine zero discharge treatment system, can solve the problems of increasing the treatment capacity of an evaporative crystallization unit, high operation cost, and many treatment units, and achieves low operation cost, stable process, and treatment cost. low effect

Pending Publication Date: 2022-07-08
TANGSHAN IRON & STEEL GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the traditional process is that a large amount of Na is added to the high-density clarifier 2 CO 3 , NaOH, etc., the sediment needs to be dehydrated and pressed by a plate and frame filter press, and when the resin softening tank fails, it needs to be regenerated with hydrochloric acid or sodium chloride. The processing capacity of the crystallization unit; the traditional process has multi-media filters and ultrafiltration, many processing units, high operating costs, and the generation of mud cakes will pollute the environment

Method used

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Effect test

Embodiment 1

[0045] Iron and steel plant water treatment station, the amount of industrial brine to be treated is 730m 3 / h, the processing method used is the processing method of the present invention, and the concrete processing steps are as follows:

[0046] (1) The industrial concentrated brine is stored in the industrial brine tank, and is transported to electrodialysis by water pump for treatment. The electrodialysis uses direct current as the driving force for desalination and L concentration, and the organic matter and salt are separated through the ion exchange membrane, and the electrodialysis concentrate is carried out. It is stored in the concentrated liquid pool, and then enters the evaporator crystallization unit for thorough treatment. The electrodialysis water enters the electrodialysis water tank, and then enters the acid-resistant nanofiltration membrane through the pressurized pump. The acid-resistant nanofiltration membrane concentrated water is returned to the industr...

Embodiment 2

[0066] Iron and steel plant water treatment station, the amount of industrial brine to be treated is 60m 3 / h, the processing method used is the processing method of the present invention, and the concrete processing steps are as follows:

[0067] (1) The industrial concentrated brine is stored in the industrial concentrated brine tank, and is transported to electrodialysis by a water pump for treatment. The electrodialysis uses direct current as the driving force for desalination and L concentration, and the organic matter and salt are separated through the ion exchange membrane, and the electrodialysis concentrate is carried out. It is stored in the concentrated liquid pool, and then enters the evaporator crystallization unit for thorough treatment. The electrodialysis water enters the electrodialysis water tank, and then enters the acid-resistant nanofiltration membrane through the pressurized pump. The acid-resistant nanofiltration membrane concentrated water is returned ...

Embodiment 3

[0075] Iron and steel plant water treatment station, the amount of industrial brine to be treated is 20m 3 / h, the processing method used is the processing method of the present invention, and the concrete processing steps are as follows:

[0076] (1) The industrial concentrated brine is stored in the industrial concentrated brine tank, and is transported to electrodialysis by a water pump for treatment. The electrodialysis uses direct current as the driving force for desalination and L concentration, and the organic matter and salt are separated through the ion exchange membrane, and the electrodialysis concentrate is carried out. It is stored in the concentrated liquid pool, and then enters the evaporator crystallization unit for thorough treatment. The electrodialysis water enters the electrodialysis water tank, and then enters the acid-resistant nanofiltration membrane through the pressurized pump. The acid-resistant nanofiltration membrane concentrated water is returned ...

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Abstract

The invention relates to an industrial strong brine zero discharge treatment system which comprises an industrial strong brine tank, an electrodialysis device, a concentrated solution tank and an evaporative crystallization unit which are sequentially connected, an electrodialysis produced water outlet is connected with an electrodialysis produced water tank, and the electrodialysis produced water tank is sequentially connected with a first pressure pump, an acid-resistant nanofiltration membrane, a second pressure pump and a reverse osmosis membrane. And finally, the concentrated water of the reverse osmosis membrane is returned to the electrodialysis water producing tank from a water outlet, and the concentrated water of the acid-resistant nanofiltration membrane is returned to the industrial concentrated brine tank. The invention further relates to a treatment method using the treatment system. According to the invention, the industrial strong brine is concentrated by using a simple and low-cost method, the final produced water is recycled, and the rest of super strong brine is evaporated and crystallized, so that the purpose of zero emission of strong brine is achieved.

Description

technical field [0001] The invention belongs to the field of industrial concentrated brine treatment, and specifically relates to an industrial concentrated brine zero-discharge treatment system and method for concentrating industrial concentrated brine, recycling desalinated water, and evaporating and crystallizing the remaining ultra-concentrated brine to achieve the purpose of zero-discharging concentrated brine. Background technique [0002] In industrial production, many companies will use wastewater recycling technology, but the recycling of high-salt and high-hardness wastewater has always been a problem. The traditional process uses dual-alkali method to reduce the hardness, and then uses resin to reduce the hardness. Finally, the membrane method is used for desalination to achieve reuse of water. Standard, acid-base regeneration liquid and reverse osmosis concentrated brine are evaporated and crystallized to achieve zero discharge of waste water. [0003] The tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/4693C02F1/42C02F1/444C02F1/441C02F1/04Y02A20/131
Inventor 梁宏书鲁长炜王鑫育陈长辉
Owner TANGSHAN IRON & STEEL GROUP
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