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Filter membrane module cleaning method and cleaning apparatus

A technology for cleaning equipment and filtration membranes, applied in chemical instruments and methods, membranes, ultrafiltration, etc., can solve problems such as uneven cleaning, and achieve the effect of reducing costs and inhibiting the decline of cleaning effect.

Inactive Publication Date: 2015-06-24
MEIDENSHA ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of uneven cleaning, a large amount of chemical solution needs to be injected into the filter membrane module at a much higher pressure, which requires the use of a high pressure pump and a larger amount of chemical solution

Method used

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  • Filter membrane module cleaning method and cleaning apparatus
  • Filter membrane module cleaning method and cleaning apparatus

Examples

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Embodiment Construction

[0032] figure 1 is a schematic diagram of a sewage treatment system equipped with the filter membrane module cleaning apparatus of the present invention, which system operates by implementing the membrane bioreactor method (MBR). In the shown sewage treatment system, raw water 1 such as domestic sewage, industrial wastewater, etc. is introduced into a screen tank 2 and filtered by a fine mesh 3 to thereby remove solid waste, and guided to a flow regulating tank 4 . Then, with the help of the pump 5 regulating the flow, the raw water from which the solid waste has been removed is guided from the flow regulating tank 4 to the denitration tank 6 and then to the reaction tank 7 with the gravity flow caused by the water level difference. Due to the operation of the return pump 8, water returns from the reaction tank 7 to the denitration tank 6, thereby forcing the activated sludge to circulate between and around the denitration tank 6 and the reaction tank 7, and a part of the acti...

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Abstract

In a conventional in-air cleaning method and a cleaning device, a filtration membrane module is pulled out from a reaction tank and a chemical must be injected into the filtration membrane module that is exposed to air, therefore requiring a complicated work and large amounts of facility cost and installation space. To solve the above problems, according to the invention, a filtration membrane module (11) is cleaned in such a way that: the filtration membrane module (11) is housed in a module casing (27); air is introduced into the module casing (27), thereby filling the inside of the module casing (27) with the air; a cleaning chemical such as, for example, a sodium hypochlorite solution is injected into the secondary side of the filtration membrane module (11) while the filtration membrane module (11) is exposed to air; and the chemical is penetrated into the primary side of the filtration membrane module (11).

Description

technical field [0001] The present invention relates to a filter membrane module cleaning method and cleaning equipment by means of which polluting substances contained in domestic sewage and industrial wastewater are put into a reaction tank to undergo biological treatment or flocculation / Precipitation is used to carry out filtration operations. Background technique [0002] In a membrane separation treatment system in which pollutants contained in domestic sewage and industrial wastewater are treated by biological treatment or coagulation / sedimentation treatment and then filtered by a filtration membrane module, the filtration membrane module is placed in a reaction tank, and the to-be-filtered Water is subjected to membrane separation by filtration operations. [0003] Due to the filtration operation, the polluting substances that have been removed tend to deposit on the membrane surface of the filtration membrane module and collect in the tiny pores inside the membrane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02
CPCB01D61/18B01D65/02B01D2315/06B01D2321/04B01D2321/16B01D2321/185C02F3/1273C02F3/302C02F2203/002Y02W10/10B01D2313/205B01D63/00
Inventor 佐藤茂雄丰冈和宏
Owner MEIDENSHA ELECTRIC MFG CO LTD
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