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A pulse type flat membrane bioreactor flushing device and flushing method thereof

A bioreactor and flushing device technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of damaged membrane, high energy consumption, low efficiency, etc. Periodic, thorough cleaning effect

Active Publication Date: 2017-05-24
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects of damaged diaphragm, high energy consumption, poor cleaning effect and low efficiency in the cleaning method in the prior art, the present invention provides a pulse type flat membrane bioreactor flushing device and its flushing method

Method used

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  • A pulse type flat membrane bioreactor flushing device and flushing method thereof
  • A pulse type flat membrane bioreactor flushing device and flushing method thereof
  • A pulse type flat membrane bioreactor flushing device and flushing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] As shown in the figure, the pulsed flat membrane bioreactor flushing device includes the flat membrane bioreactor body, water distribution pipe, blower, backwashing water tank, water pump, first solenoid valve, second solenoid valve, third solenoid, and second solenoid valve. One check valve, second check valve and third check valve;

[0036] The flat membrane bioreactor body includes a flat membrane and a flat membrane water production tube. The top of the flat membrane is provided with a water outlet. The wall of the flat membrane water production tube is provided with a water inlet corresponding to the water outlet. The water outlet and the water inlet pass through soft The pipes are connected, and the flat membrane water production pipe is provided with a water outlet; there are 75 flat membranes, and the distance between two adjacent flat membranes is 18mm.

[0037] The water outlet on the flat membrane water pipe is divided into two branches, one is connected to the fi...

Embodiment 2

[0046] It is basically the same as Example 1, but the difference is: the gas used for gas reverse flushing is water vapor; the flat membrane bioreactor is shut down intermittently, specifically, it is turned on for nine minutes and stopped for one minute. Self-flushing the flat membrane bioreactor. In the alternating pulse mode, the time of a single flush of liquid reverse flushing is 2.5min and the pressure is 0.2MPa, and the time of single flush of air reverse flushing is 1.5min, and the pressure is 0.3Mpa.

[0047] The flushing device of the above embodiments does not need to be flushed offline, nor does it need to use any chemical reagents, avoiding the phenomenon of gas phase cutting liquid phase and the phenomenon of gas or liquid phase passing along an uncontaminated unobstructed flow channel, and achieving a thorough cleaning of the inner surface ; Extend the chemical cleaning cycle to 6 months for once, and extend the regeneration repair cycle to more than 8 years.

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Abstract

The invention discloses an impulse type flushing device for a flat membrane bioreactor and a flushing method thereof. The impulse type flushing device for the flat membrane bioreactor comprises a flat membrane bioreactor body, a water distributing pipe, an air blower, a back flushing water tank, a water pump, a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve. According to the flushing device, off-line flushing and any chemical reagent are not needed; spiral jet flows are ejected from spiral jet holes and / or spiral jet nozzles to the flat membrane in multiple directions by the outer surface of the flat membrane, so that effective and uniform flushing for the outer surface of the flat membrane can be achieved, and the defect that in the past, sludge adheres to the surface of the flat membrane and blocks hole channels is solved; liquid phase back flushing and gas phase back flushing are carried out alternatively on the inner surface of the flat membrane in an impulse manner, so that the dirt in the membrane can be extruded out reversely, and the flow channels are dredged; the dirt on the surfaces of the hole channels is blown off by gas phase and washed away by liquid phase later, and gas phase back flushing and liquid phase back flushing are circulated, so that the hole channels of the membrane are cleaned thoroughly; the flushing method is efficient and thorough.

Description

Technical field [0001] The invention relates to a pulse type flat membrane bioreactor flushing device and a flushing method thereof, and belongs to the field of sewage treatment. Background technique [0002] Flat ceramic membrane bioreactor is a flat membrane placed in the reactor, through aeration to meet the needs of microbial growth and then remove pollutants, this treatment technology can meet a variety of sewage treatment processes, but will bring membrane pollution It will cause the membrane flux to decrease and the water production rate to decrease. Therefore, the flat membrane needs to be chemically cleaned regularly. For ceramic membrane elements, chemical cleaning is usually performed once a month after use, and it takes about 5-6 years. Perform regenerative repair. [0003] Chemical cleaning needs to be offline, stop production, empty the pool, and move the equipment away from the pool body, which is time-consuming and laborious, increasing the difficulty of operation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12B01D65/02
CPCY02W10/10
Inventor 朱宣何佳陆涛丁恺
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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