Operating method of water purifier

A technology of water purification device and operation method, which is applied in the direction of chemical instruments and methods, permeation/dialysis water/sewage treatment, membrane, etc., which can solve the problem that clogging substances cannot be fully peeled off, achieve reliable removal, and increase the number of cleanings.

Inactive Publication Date: 2012-11-21
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the above-mentioned water purification device, there is a problem that when a part of the clogging substance attached to the primary side is peeled off by backwashing, the water flow caused by backwashing is concentrated in this part, so the clogging substance in other parts cannot be fully removed. peel off

Method used

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  • Operating method of water purifier
  • Operating method of water purifier
  • Operating method of water purifier

Examples

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Embodiment Construction

[0033] Below, refer to Figure 1 to Figure 5 An example of the embodiment of the present invention will be described.

[0034] figure 1 It is a water purifier 1 for filtering raw water. Depending on the area used, river water, lake water, well water, industrial water, etc. are supplied as raw water through waterways. On the main raw water supply flow path 2 of the water purifier 1, a pump 3 for boosting the water pressure in the waterway, and a downstream pump 3 for stabilizing the water pressure output by the pump 3 are installed. Pressure reducing valve 4. In addition, the booster pump 3 does not necessarily need to be operated, and when the inflow pressure of the raw water is high, the pump 3 may not be provided.

[0035] The main raw water supply flow path 2 is branched and connected to a first raw water supply flow path 5 and a second raw water supply flow path 6. A first membrane filtration unit 7 is connected to the first raw water supply flow path 5, and a second membran...

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Abstract

In an operating method of a water purifier, membrane cleaning operation includes a process of draining raw water on the primary side of first membrane filtration means (7) through a drainage channel (9), a process of performing exhaust back water conduction for filling the primary side interior with back washed water by supplying purified water, obtained by supplying raw water from a main raw water supply channel (2) only to the primary side of second membrane filtration means (8), from the secondary side of the first membrane filtration means (7) under a state where the primary side interiorof the first membrane filtration means (7) is opened to the atmosphere, and a process of performing back water conduction for draining the back washed water in the primary side interior from the drainage channel (9) by supplying the purified water obtained by supplying raw water from the main raw water supply channel (2) only to the primary side of the second membrane filtration means (8), from the secondary side of the first membrane filtration means (7).

Description

Technical field [0001] The invention relates to an operating method of a water purification device. [0002] This application claims priority based on Patent Application No. 2007-178847 filed with the Japan Patent Office on July 6, 2007, and the content is cited here. Background technique [0003] In the past, there has been known a water purifier that is installed in the middle of pipes such as waterways and performs membrane filtration. In such a water purifier, whenever the membrane becomes fouled such as clogging of the mesh, the membrane needs to be replaced. Especially in areas where the water environment is not very good, the frequency of membrane replacement is high, so the burden on the environment, operation, and economy is relatively large. In order to prolong the life of the membrane, there are the following water purification devices: connect two filter units in parallel, so that the purified water discharged from one filter unit flows backward from the secondary sid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02B01D63/02C02D1/44
CPCB01D65/02C02F1/44B01D2321/12B01D63/02B01D2321/04B01D2317/04
Inventor 加藤辰广盐谷徹板仓正则赞井克弥
Owner MITSUBISHI RAYON CO LTD
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