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Impulse type flushing device for flat membrane bioreactor 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 diaphragm, high energy consumption, low efficiency, etc., and achieve prolonged chemical cleaning The effect of periodic, thorough cleaning

Active Publication Date: 2015-09-30
NANJING FIBERGLASS RES & DESIGN INST CO LTD +1
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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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  • Impulse type flushing device for flat membrane bioreactor and flushing method thereof
  • Impulse type flushing device for flat membrane bioreactor and flushing method thereof
  • Impulse type flushing device for flat membrane bioreactor and flushing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] As shown in the figure, the pulse-type flat-panel membrane bioreactor flushing device includes the flat-panel membrane bioreactor body, water distribution pipe, blower, backwash water tank, water pump, first solenoid valve, second solenoid valve, third solenoid valve, and second solenoid valve. a check valve, a second check valve and a third check valve;

[0036] The flat membrane bioreactor body includes a flat membrane and a flat membrane water production pipe. The top of the flat membrane is provided with a water outlet, and the wall of the flat membrane water production pipe is provided with a water inlet hole corresponding to the 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 production pipe is divided into two branches, one of which is connected with the first check valve, the first solenoid valve and the blower pipeline in turn, and the other is connecte...

Embodiment 2

[0046] It is basically the same as Example 1, except that the gas used for gas-phase flushing is water vapor; the flat-panel membrane bioreactor is shut down intermittently, specifically for nine minutes and one stop, that is, nine minutes and one minute stop. Self-flushing of flat membrane bioreactors. The single flushing time of the liquid phase flushing in the alternate pulse mode is 2.5min and the pressure is 0.2MPa, and the single flushing time of the gas phase flushing is 1.5min and the pressure is 0.3Mpa.

[0047] The flushing devices in the above embodiments do not require off-line flushing, nor do they need to use any chemical reagents, which avoids the phenomenon of gas phase cutting liquid phase and the phenomenon of gas phase or liquid phase passing along the uncontaminated unobstructed flow channel, and realizes the thorough cleaning of the inner surface ; Extend the chemical cleaning cycle to once every 6 months, and extend the regeneration repair cycle to more t...

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PUM

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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, belonging to the field of sewage treatment. Background technique [0002] The flat ceramic membrane bioreactor is to place the flat membrane in the reactor and meet the needs of microbial growth through aeration to remove pollutants. This treatment technology can meet a variety of sewage treatment processes, but it will bring membrane pollution It will cause a decrease in membrane flux and a decrease in water production rate. Therefore, it is necessary to chemically clean the flat membrane on a regular basis. For ceramic membrane elements, chemical cleaning is usually performed once a month, and it takes about 5-6 years. Perform regenerative repair. [0003] Chemical cleaning needs to be offline, stop production, empty the pool, and remove the equipment from the pool. Structural damage and a large amount of chemical cleaning agents are consum...

Claims

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Application Information

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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