Membrane precision filter for wastewater treatment and application thereof

A technology for precision filtration and wastewater treatment, applied in osmosis/dialysis water/sewage treatment, etc., which can solve the problems of microbial contamination of reverse osmosis membrane, adding a large amount of chemicals, and complex ultrafiltration reverse osmosis process.

Active Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In view of the defects existing in the prior art, the object of the present invention is to provide a membrane precision filtration device for treating wastewater, to overcome the serious microbial contamination of the reverse osmosis membrane in the existing double-membrane device, which is not suitable for high COD water quality, ultrafiltration reverse The permeation process is complex and needs to add a large amount of chemicals, the operating pressure of the ultrafiltration part is high, and the ultrafiltration water production end is easy to be fouled and blocked, etc.

Method used

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  • Membrane precision filter for wastewater treatment and application thereof
  • Membrane precision filter for wastewater treatment and application thereof
  • Membrane precision filter for wastewater treatment and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0122] The composition of the membrane precision filtration device includes raw water opening adjustment valve 2, raw water pump 3, ultrafiltration membrane area 4, submerged membrane unit 5, liquid level gauge 6 in the ultrafiltration membrane area, mud discharge port 11, ultrafiltration water production pump 12, Reverse osmosis high pressure pump 14, reverse osmosis membrane unit 15, reverse osmosis circulation pipeline pump 16, backwash pump 17, product water tank 18, cleaning water tank 19, product water tank level gauge 20, reverse osmosis product water pump 21, concentration water opening Regulator valve 22.

[0123] The raw water of the membrane precision filtration device is waste water that has undergone coagulation, biochemical treatment and disc filter filtration. The COD value is less than 50, and the turbidity value is 3. The BOD / COD value in the biochemical wastewater is less than 0.1, and the hardness is less than 100mg / L. The flow rate is 12t / h. The raw water ...

example 2

[0129] The composition of the membrane precision filtration device includes raw water dosing port 1, raw water opening adjustment valve 2, raw water pump 3, ultrafiltration membrane area 4, submerged membrane unit 5, ultrafiltration membrane area liquid level gauge 6, partition 7, raw water Reaction zone 8, reaction zone dosing port 9, overflow weir 10, sludge discharge port 11, ultrafiltration product water pump 12, reverse osmosis dosing port 13, reverse osmosis high pressure pump 14, reverse osmosis membrane unit 15, reverse osmosis circulation pipe Road pump 16, backwash pump 17, product water tank 18, cleaning water tank 19, product water tank liquid level gauge 20, reverse osmosis product water pump 21, concentrated water opening control valve 22.

[0130] The raw water of the membrane precision filtration device is high-concentration organic wastewater, which contains more suspended solids and colloids, the turbidity value is 8, the COD value is greater than 2000, and th...

example 3

[0136] The composition of the membrane precision filtration device includes raw water opening adjustment valve 2, raw water pump 3, ultrafiltration membrane area 4, submerged membrane unit 5, liquid level gauge 6 in the ultrafiltration membrane area, mud discharge port 11, ultrafiltration water production pump 12, Reverse osmosis high pressure pump 14, reverse osmosis membrane unit 15, reverse osmosis circulation pipeline pump 16, backwash pump 17, product water tank 18, cleaning water tank 19, product water tank level gauge 20, reverse osmosis product water pump 21, concentration water opening Regulator valve 22.

[0137] The raw water of the membrane precision filtration device is wastewater that has undergone coagulation, biochemical treatment and disc filter filtration. The COD value is less than 20, the BOD / COD value in the biochemical wastewater is less than 0.2, and the water flow rate is 100t / h. The raw water enters from the bottom of the ultrafiltration membrane area ...

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Abstract

The invention discloses a membrane precision filter for wastewater treatment and application thereof and relates to a wastewater treatment device and application thereof. In the membrane precision filter for wastewater treatment, the raw water enters a membrane region after being pretreated in a certain mode and is filtered by an immersed membrane unit; the ultra-filtered water is pressurized and then directly enters a reverse osmosis membrane unit; one part of the reverse osmosis water is conveyed to a water using region and the other part of the reverse osmosis water is used for cleaning the immersed membrane unit and the reverse osmosis membrane unit; and one part of the reverse osmosis concentrated water flows back to a water inlet of the reverse osmosis membrane unit and the other part of the reverse osmosis concentrated water is discharged or enters other treatment system for further treatment. The membrane precision filter for wastewater treatment can reduce the energy consumption of ultrafiltration operation when the water quality of the ultra-filtered water is high and effectively reduce ultrafiltration membrane pollution when the water quality of the ultra-filtered water is low, is suitable for high chemical oxygen demand (COD) water quality, reduces microbial contamination of the reverse osmosis membrane, and reduces the using amount of medicaments.

Description

technical field [0001] The invention relates to a waste water treatment device and its application, in particular to a membrane precision filter device for treating waste water and its application. Background technique [0002] In recent years, membrane separation technology has developed rapidly and has been widely used in chemical wastewater treatment, seawater, brackish water desalination, environmental pollution control and other fields. [0003] In essence, membrane separation technology is also a filtration technology, but compared with other traditional filtration technologies, membrane separation technology has the advantage of high precision, which can be divided into low-pressure membrane filtration and high-pressure membrane filtration. [0004] The low-pressure membrane filtration process includes microfiltration (MF) and ultrafiltration (UF), which are pressure-driven filtration technologies. Generally, they can only remove particles and microorganisms with a di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
Inventor 李正琪李井峰杨永强张新妙
Owner CHINA PETROLEUM & CHEM CORP
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