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Novel high-efficiency flexible flat sheet membrane on-line automatic physical cleaning device

A technology of physical cleaning and flat membrane, applied in biological water/sewage treatment, membrane technology, semi-permeable membrane separation, etc., can solve the problem of uniform mixing of activated sludge, increase of reactor footprint, difficulty in large-scale application, etc. problems, to achieve the effect of fully utilizing the membrane area, saving space and saving investment

Active Publication Date: 2015-06-03
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been successful implementations of flexible membrane-bioreactor self-cleaning devices (Patent No. 201110127498) or anaerobic micro-mesh self-cleaning reactors (Patent No. 201110127445), but there are many shortcomings in the form of scrapers
Although the V-shaped scraper can discharge the pollutants on the membrane surface out of the activated sludge mixture, the processing of the V-shaped scraper is complicated, takes up a large space, and the cleaning effect is not good.
The cleaning effect of misplaced scraper is better, but its disadvantage is that the scraper is tightly fitted between the two membranes, which seriously hinders the rise of water flow and is not conducive to the uniform mixing of activated sludge
In addition, the power of the above two self-cleaning devices comes from the up and down movement of the two cleaning water tanks outside the reactor, which increases the area occupied by the reactor, increases the failure rate, and is difficult to promote and apply on a large scale

Method used

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  • Novel high-efficiency flexible flat sheet membrane on-line automatic physical cleaning device
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  • Novel high-efficiency flexible flat sheet membrane on-line automatic physical cleaning device

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 - Figure 4 As shown, the present invention is made up of power system 1, transmission system 2, cleaning system 4, balance system 5 and support system 6 five parts. The power system 1 is all electromechanical equipment that converts electrical energy into mechanical energy, and generates energy to move the cleaning system 4, and is used to drive one or more sets of cleaning systems 4 to move in a direction parallel to the membrane surface. The occurrence of the cleaning action is controlled by the time relay or the transmembrane pressure difference feedback control system. When the time relay reaches the preset time or the transmembrane pressure difference reaches the set value, the cleaning action occurs. When cleaning, the power system 1 generates power parallel to the membrane surface, and drives the cleaning system to move from the bottom of the membrane element to the top (or from the top to the bottom) through the transmission system. W...

Embodiment 2

[0037] The present invention is used in the treatment of certain rural sewage, the sludge concentration is 8 g / L, and the membrane flux is 30 L / m 2 h, higher than the critical flux of the membrane module in this case, using a microporous aeration tube, the air-water ratio is 8:1, and it is automatically cleaned 3 times a day. After 63 days of stable operation, the water and electricity consumption per ton is 0.45 yuan, and the total treatment cost per ton of water is 0.60 yuan.

Embodiment 3

[0039] The present invention is used in the treatment of catering wastewater in a certain supermarket, each power system drives 3 sets of devices, the sludge concentration is 16 g / L, and the membrane flux is 35 L / m 2 h, higher than the critical flux of the membrane module in this case, using a microporous aeration tube, the air-water ratio is 10:1, and it is automatically cleaned once a day. After 30 days of stable operation, the water and electricity consumption per ton is 0.40 yuan, and the total treatment cost per ton of water is 0.55 yuan.

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Abstract

The invention relates to a novel high-efficiency flexible flat sheet membrane on-line automatic physical cleaning device, which relates to flat sheet membrane cleaning of a membrane bioreactor and is suitable for cleaning of a flexible flat sheet membrane bioreactor for processing various kinds of biodegradable sewage. The device consists of five parts, i.e., a power system, a transmission system, a cleaning system, a balance system and a supporting system, wherein the power system can be all electromechanical equipment for converting electric energy into mechanical energy; the cleaning system is a dislocated scraper with flow guide holes; the power system is used for driving the cleaning system to move along the direction parallel to the membrane surface to erase off membrane surface pollutants though the transmission system; the balance system is used for maintaining that the cleaning system does not displace in the horizontal direction and the movement in the vertical direction is more stable; the supporting system is used for supporting the entire on-line automatic physical cleaning device. The device has the advantages of capabilities of improving the processing capacity of the membrane bioreactor, reducing the flat sheet membrane cleaning cost and increasing the stability for system operation, small floor area, low operation cost and capability of realizing assembly line production and assembly and large-scale popularization and application.

Description

technical field [0001] The invention relates to an online automatic physical cleaning device for a flexible flat membrane, which relates to the cleaning of a flat membrane of a membrane-bioreactor, especially for automatic cleaning of a flexible flat membrane, and is suitable for the flexible flat membrane membrane-biological reaction of various biodegradable sewage appliance cleaning. Background technique [0002] Membrane Bioreactor (Membrane Bioreactor, hereinafter referred to as MBR) is to place the membrane module directly in the reactor, and obtain the filtrate through the suction of the pump; aeration and oxygen supply are carried out through the blower, on the one hand, it meets the needs of microbial growth and pollutant removal. On the other hand, certain hydraulic turbulent conditions and cross-flow velocity on the membrane surface are formed on the membrane surface, so as to control and slow down membrane fouling. Among them, the flat membrane-bioreactor is suit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/04C02F3/00
Inventor 韩小蒙王巧英梅晓洁王志伟狄瀚娴藏莉莉吴志超
Owner TONGJI UNIV