Method for realizing water treatment by using pressure type continuous membrane filtering system

A filtration system and continuous membrane technology, applied in osmosis/dialysis water/sewage treatment, chemical instruments and methods, ultrafiltration, etc., can solve the difference in aeration intensity of membrane filaments, inadequate cleaning of membrane filaments, and easy wear and tear of membrane filaments, etc. problems, achieve the effect of reducing self-water consumption, prolonging membrane cleaning cycle, and avoiding easy wear and tear

Active Publication Date: 2013-08-07
TIANJIN MOTIMO MEMBRANE TECH
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Problems solved by technology

The air-water double washing stage in the traditional operation process is continuous aeration at a constant high liquid level, which tends to cause great differences in the aeration intensity of the membrane filaments in the horizontal and vertical directions. The membrane filaments with severe

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  • Method for realizing water treatment by using pressure type continuous membrane filtering system
  • Method for realizing water treatment by using pressure type continuous membrane filtering system

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[0018] Example 1: The effluent from the secondary sedimentation tank of a municipal sewage treatment plant adopts the traditional biochemical treatment process. After coagulation and sedimentation, it enters the ultrafiltration membrane system, but the turbidity of the system influent is about 1.0 NTU. Before the improvement, the water production stage time of the system was 20min, and the constant flow water production flux was 2.0m 3 / Branch.h; small flow backwash volume in air and water double washing stage is 0.3m 3 / Branch.h, the time is 30s, the large-flow backwashing amount is 2.0m in the large-flow backwash stage 3 / 支.h, the time is 30s, the discharge stage is static pressure discharge. By adjusting the parameters, the improved water production stage time of the system is 20min, and the constant flow water production flux is 2.0m 3 / 支.h; the concentrated raw water discharge stage is static pressure discharge to the bottom; the air-water double washing stage has a small fl...

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Abstract

The invention discloses a method for realizing water treatment by using a pressure type continuous membrane filtering system and provides a method which can be used for enhancing the air and water double-washing effect, increasing the recovery rate of the produced water and prolonging the washing period. At an air and water double-washing stage, filtered water with a small flow is reversely filled inside a membrane fiber, meanwhile, compressed air is introduced from the bottom end of a membrane component, and backwashing water reversely washes and permeates out of the membrane fiber to form a rotary air and water current together with the compressed air, so that the membrane fiber in the position is sufficiently and doubly washed; and the formed rotary air and water current for washing rises along with the gradual rise of the water level inside the membrane component, and pollutants and impurities are washed through washing membrane fibers in different positions and the inner wall of the membrane component from bottom to top. The integral membrane fiber is uniformly washed by using the rotary air and water current for washing, so that the aeration intensity and aeration time of the integral membrane fiber are more uniform in distribution, the washing effect is improved, the membrane washing period is prolonged, the service life of a membrane is prolonged, and the system is more stable in operation.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for realizing water treatment by using a pressure type continuous membrane filtration system. Background technique [0002] In the field of water treatment technology, pressure continuous membrane filtration systems are widely used in water purification. The system takes the hollow fiber ultrafiltration membrane as the central processing unit. During the process of purifying water, the treatment liquid passes through the surface of the membrane at a certain flow rate, and the water molecules pass through the membrane under a certain pressure, while the suspended solids, colloids, and macromolecules Organic matter and microorganisms are intercepted, so as to achieve the purpose of purification and separation. The intercepted impurities gradually accumulate on the outer surface of the membrane wall, constantly causing water flow resistance through the membrane wal...

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Application Information

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IPC IPC(8): C02F1/44B01D65/02B01D61/14
Inventor 柯永文戴海平王龙兴苏烨甄朝阳孙磊刘圣根
Owner TIANJIN MOTIMO MEMBRANE TECH
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