A treatment method and treatment device for increasing BOD in leveling liquid wastewater

A treatment method and technology for leveling fluid, applied in the fields of metallurgical wastewater treatment, water/sewage multi-stage treatment, special compound water treatment, etc., can solve the problem of not paying attention to the method of improving BOD in leveling fluid, and achieve good social and environmental benefits. , the effect of improving BOD and increasing efficiency

Active Publication Date: 2020-04-28
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above Chinese patents do not pay attention to the method of improving BOD in leveling liquid

Method used

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  • A treatment method and treatment device for increasing BOD in leveling liquid wastewater

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Embodiment 1

[0042] A treatment process system for improving BOD in leveling liquid wastewater, including water inlet pump, cartridge filter, primary water inlet pump, fiber filter, intermediate water tank, secondary water inlet pump, photochemical reactor, glass fiber loaded titanium sulfur vanadium light Catalyst, drain pump.

[0043] The pH of the leveling liquid wastewater is 7.5, the BOD is 115 mg / L, and the suspended matter is 57 mg / L.

[0044] The leveling liquid waste water flows into the cartridge filter through the water inlet pump. The filter bag is supported by a metal mesh basket inside the cartridge filter. The flat liquid wastewater flows out after being filtered by the filter bag, and the impurity particles and suspended solids are intercepted in the filter bag. The filtration accuracy of the bag filter is 15 microns, and the surface area of ​​the filter cartridge is 0.08m 2 , the flow rate is 15m 3 / h. The suspended solids of leveling liquid wastewater after passing th...

Embodiment 2

[0052] A treatment process system for improving BOD in leveling liquid wastewater, including water inlet pump, cartridge filter, primary water inlet pump, fiber filter, intermediate water tank, secondary water inlet pump, photochemical reactor, glass fiber loaded titanium sulfur vanadium light Catalyst, drain pump.

[0053] The pH of the leveling liquid wastewater is 8.1, the BOD is 233 mg / L, and the suspended matter is 39 mg / L.

[0054] The leveling liquid waste water flows into the cartridge filter through the water inlet pump. The filter bag is supported by a metal mesh basket inside the cartridge filter. The flat liquid wastewater flows out after being filtered by the filter bag, and the impurity particles and suspended solids are intercepted in the filter bag. The filtration accuracy of the bag filter is 5 microns, and the surface area of ​​the filter cartridge is 0.17m 2 , the flow rate is 9m 3 / h. The suspended solids of leveling liquid wastewater after passing thro...

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Abstract

The present invention provides a treatment method and a treatment apparatus for improving BOD in a flattening liquid. The treatment method comprises that flattening liquid wastewater flows into a drum type filter and then enters a fiber filter through a first-stage water inlet pump, wherein a spray fusion filtration core is built in the fiber filter; the flattening wastewater passes through the fiber filter and then enters a middle water box, and then enters a photochemical reactor through a second-stage water inlet pump, wherein the outer portion of the photochemical reactor comprises a transparent quartz glass pipe, and an immobilized photocatalyst is built in the transparent quartz glass pipe and is a glass fiber-supported titanium-sulfur-vanadium photocatalyst; and after the wastewater passes through the photochemical reactor, the obtained wastewater finally enters a biochemical pool and is subjected to aerobic biochemical treatment. With the treatment system and the treatment method of the present invention, the one-time investment is low, the operation is simple, the production treatment cost is low, and the method is the environment-friendly steel and iron wastewater treatment process.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a treatment method and a treatment device for improving BOD in leveling liquid wastewater. Background technique [0002] Leveling liquid is an important medium used in the steel wet leveling process. Leveling liquid generally consists of the following parts: rust remover, surfactant, lubricant, defoamer and deionized water, etc. [0003] The pH of the leveling liquid wastewater produced in the wet leveling process is 9-10, the conductivity is 400-4000us / cm, the BOD is 95-260mg / L, and the suspended matter is 25-60mg / L. Leveling liquid has many organic pollutants, low BOD (biochemical oxygen demand), and poor biodegradability. Traditional biological treatment is difficult to work. At present, there is no mature treatment process at home and abroad. Most of it is diluted and mixed with other wastewater. It is one of the most difficult steel industry wastewater ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/30B01J27/04
CPCB01J27/04B01J35/004C02F1/001C02F1/30C02F3/02C02F9/00C02F2103/16C02F2305/10
Inventor 李恩超何晓蕾武晟丁宗琪陈砚秋叶倩石洪志尹婷婷
Owner BAOSHAN IRON & STEEL CO LTD
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