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Processing system and method for cold rolling reverse osmosis strong brine

A treatment system and treatment method technology, applied in the field of cold-rolled reverse osmosis concentrated brine treatment system, can solve the problems of low production and treatment costs, environmental pollution, etc.

Active Publication Date: 2015-11-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the problem of environmental pollution caused by the direct discharge of cold-rolled reverse osmosis concentrated brine, the object of the present invention is to provide a treatment system and method for cold-rolled reverse osmosis concentrated brine. The treatment system has low initial investment and simple operation. Use waste to treat waste; production and treatment costs are low, and it is an environmentally friendly green treatment of steel wastewater; according to the water quality and quantity of cold-rolled reverse osmosis concentrated brine, the present invention develops an economical and efficient reverse osmosis concentrated brine discharge treatment system that meets the standard. reduce environmental pollution

Method used

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  • Processing system and method for cold rolling reverse osmosis strong brine
  • Processing system and method for cold rolling reverse osmosis strong brine

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Embodiment 1

[0092] The water quality of cold rolling waste water reverse osmosis concentrated brine in embodiment 1: conductivity is 16000 μ S / cm, and chloride ion is 3570 mg / L, and sulfate ion is 653 mg / L, and pH is 4, and total nitrogen is 91 mg / L, and nitrate nitrogen is 67mg / L, ammonia nitrogen 18mg / L, COD 270mg / L, BOD 45mg / L, total iron 15mg / L, total nickel 1.8mg / L, total zinc 2.4mg / L, total chromium 0.4mg / L, the total lead is 0.5mg / L, the total copper is 0.5mg / L, and the water temperature is 47 degrees.

[0093] The cold-rolled reverse osmosis concentrated water enters the plate heat exchanger, and the outlet water temperature is controlled between 23 degrees.

[0094] Then enter the nano zero-valent iron slag reactor. The volume ratio of quartz sand accounting for the filter material in the nanometer zero-valent iron slag reactor filter layer in this example is 10%, water slag is 10%, nanometer zero-valent iron slag is 60%, and calcium-based modified bentonite is 20%. %. The fl...

Embodiment 2

[0109] The water quality of cold rolling waste water reverse osmosis strong brine in embodiment 2: electric conductivity is 13000 μ S / cm, and chloride ion is 2890 mg / L, and sulfate ion is 613 mg / L, and pH is 10, and total nitrogen is 56 mg / L, and nitrate nitrogen is 40mg / L, ammonia nitrogen 11mg / L, COD 163mg / L, BOD 29mg / L, total iron 11mg / L, total nickel 1.1mg / L, total zinc 2.1mg / L, total chromium 0.3mg / L, the total lead is 0.3mg / L, the total copper is 0.5mg / L, and the water temperature is 37 degrees.

[0110] The cold-rolled reverse osmosis concentrated water enters the plate heat exchanger, and the outlet water temperature is controlled between 21 degrees.

[0111] Then enter the nano zero-valent iron slag reactor. In the nanometer zero-valent iron slag reactor filter material layer in this example, the volume ratio of quartz sand accounting for the filter material is 15%, water slag is 15%, nanometer zero-valent iron slag is 50%, and calcium-based modified bentonite is 20...

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Abstract

The invention provides a processing system and method for cold rolling reverse osmosis strong brine. The processing system sequentially comprises a platy heat exchanger, a first-stage lifting pump, a nanometer zero-valent iron residue reactor, a second-stage lifting pump, a PH aeration reduction pool, a third-stage lifting pump, an integrated denitrification COD biochemical pool and a coagulative precipitation tank. The cold rolling reverse osmosis strong brine enters the zero-valent iron residue reactor after passing through the platy heat exchanger to be cooled so that heavy metal can be removed. The cold rolling reverse osmosis strong brine then enters the integrated denitrification COD biochemical pool after passing through the PH aeration reduction pool so that total nitrogen and organic matter can be removed. The cold rolling reverse osmosis strong brine finally enters the coagulative precipitation tank and can reach the standard and then be discharged after coagulating sedimentation. The processing system is low in one-time investment, easy to run and operate, low in production and processing cost and capable of processing environment-friendly steel waste water in a green and environment-friendly mode.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a treatment system and method for cold-rolled reverse osmosis concentrated brine. Background technique [0002] As my country's basic industry, the iron and steel industry has developed rapidly since the reform and opening up, and has been in a high-speed development stage in recent years. However, the iron and steel industry is an industry with high energy consumption, high resources and high pollution, and its water consumption is huge, accounting for about 14% of the national industrial water consumption. [0003] The unit water consumption of my country's iron and steel enterprises is still higher than that of foreign advanced iron and steel enterprises. It is necessary to further reduce the new water consumption per ton of steel in iron and steel enterprises, improve the recycling rate of water in iron and steel enterprises, and strengthen the comprehensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张宜莓李恩超王鼎张永杰吕维群胡利光殷玫婕侯红娟吴昊
Owner BAOSHAN IRON & STEEL CO LTD
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