MBR membrane module root air inlet structure

A technology of air intake structure and membrane module, which is applied in the field of MBR modules, can solve the problems of increasing the difficulty of untangling and casting, loss of aeration effect, and small diameter of aeration holes, so as to reduce the area of ​​aeration dead zone and improve air scrubbing Effect, the effect of good gas scouring effect

Pending Publication Date: 2019-09-27
SANDA FILM SCI & TECH XIAMEN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aeration device of the membrane module is installed on the membrane filament casting tank, which greatly increases the difficulty of untangling and casting, and the diameter of the aeration hole is extremely small, which is easily blocked by sludge, thus losing the aeration effect

Method used

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  • MBR membrane module root air inlet structure
  • MBR membrane module root air inlet structure

Examples

Experimental program
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Effect test

Embodiment 1

[0046] For a certain domestic sewage, the concentration of activated sludge is 4000-6000mg / L. Fix the curtain-type MBR on the membrane frame, immerse it into the MBR tank, and use the common aeration structure and the membrane module root air intake structure of the present invention to carry out continuous aeration respectively, and perform suction according to the pump-stop ratio of 0.85. Regularly record the membrane flux and transmembrane pressure difference, and run continuously for 6 months.

[0047] Ordinary aeration structure: the curtain-type MBR membrane module adopts the ordinary aeration structure, the membrane area is 15 square meters, and there is no aeration tube at the root, which is a separate aeration; there are two rows of aeration branches on the aeration branch 4, and the aeration direction is obliquely downward The aeration hole 40 with a diameter of 5mm at 45 degrees, the aeration volume of the aeration branch pipe is 3.375m 3 / h, the gas flow rate of t...

Embodiment 2

[0053] For a certain domestic sewage, the concentration of activated sludge is 6000-8000mg / L, the treatment capacity is 600t / d, and the curtain type MBR membrane unit is used with a membrane area of ​​2400 square meters. The pump-to-stop ratio is 0.8, and the conventional aeration structure and the membrane module root intake structure of the present invention are respectively used for continuous aeration and continuous aeration, and the aeration volume is 600m 3 / h.

[0054] Ordinary aeration structure: the curtain-type MBR membrane module adopts an ordinary aeration structure, and there is no aeration pipe 34 at the root, which is a separate aeration; there are two rows of aeration branch pipes 4 with an aeration direction of 45 degrees downward and a diameter of The aeration hole 40 of 5mm, the aeration volume of the aeration branch pipe 4 is 15m 3 / h, the gas flow rate of the aeration hole 40 is 12m / s.

[0055] The air intake structure at the root of the membrane module ...

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Abstract

The invention discloses an MBR membrane module root air inlet structure. The structure comprises a plurality of hollow fiber membrane bundles, an air inlet end member, at least one air inlet end casting member and at least one aeration branch pipe. The cross-sectional area of aeration pipes is smaller than that of an air inlet chamber, the flow rate of gas in the aeration pipes can be increased, the cutting speed is increased in the process of making contact with membrane silks, and a better gas flushing effect is achieved. Accordingly, the volume of the air inlet chamber is larger, gas of multiple aeration holes can be collected and rushes out from the aeration pipes in a short time, large bubbles can be formed conveniently, the large bubbles gradually become larger in the ascending process, and finally when the bubbles collapse, the disturbance amplitude on the liquid level is increased; the liquid turbulence effect is improved, and membrane pollution is alleviated. The aeration efficiency is improved, and the required aeration amount is greatly reduced, so that the aeration amount is reduced by 10-25% compared with a conventional membrane module.

Description

technical field [0001] The invention belongs to the technical field of MBR components, and in particular relates to a root air intake structure of an MBR membrane component. Background technique [0002] At present, the submerged membrane bioreactor MBR technology is mainly used in the sewage treatment industry, such as urban sewage treatment and reuse, high-concentration organic wastewater, refractory industrial wastewater, and wastewater in public sensitive sanitation areas. Its main functional components are bioreactors and membrane modules. Flat membrane modules and hollow fiber membrane modules are the two most commonly used membrane modules. The filling density of hollow fiber membrane modules is much higher than that of flat membrane modules, and the investment is low. The applicable treatment scale can be large or small, and can meet the needs of different scales of sewage treatment in different industries. It is the most widely used. [0003] Among them, the hollow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/1273C02F2203/006C02F2303/14Y02W10/10
Inventor 黄凤祥姚萌洪昱斌方富林蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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