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Hollow fiber membrane module and method for cleaning the same

A technology of fiber membranes and fiber membrane bundles, applied in the field of hollow fiber membrane modules and their cleaning

Active Publication Date: 2020-12-18
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the cleaning gas is introduced from the outer peripheral side of the air diffusion member, but in the air diffusion member of Patent Document 1, the cleaning gas will be dispersed from the air diffusion holes before spreading throughout the circumferential direction, and it is difficult to dissipate the hollow fiber membrane bundle in the circumferential direction. Uniform gas cleaning

Method used

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  • Hollow fiber membrane module and method for cleaning the same
  • Hollow fiber membrane module and method for cleaning the same
  • Hollow fiber membrane module and method for cleaning the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025]

[0026] First, refer to figure 1 The overall structure of the hollow fiber membrane module 1 according to Embodiment 1 of the present invention will be described. The hollow fiber membrane module 1 is an external pressure filter module, such as figure 1 As shown, it mainly includes a hollow fiber membrane bundle 10 formed of a bundle of hollow fiber membranes 11 , a casing 20 , an air diffuser 30 , and a water conduit 40 . The "external pressure filtration type" is a filtration method in which raw water is permeated through the membrane wall from the outer surface toward the inner surface of the hollow fiber membrane 11 to obtain filtered water from the area on the inner surface side of the hollow fiber membrane 11 . Hereinafter, each component of the hollow fiber membrane module 1 will be described separately.

[0027] The hollow fiber membrane bundle 10 has a plurality of hollow fiber membranes 11 extending in the vertical direction, and a fixing member 12 that b...

experiment example

[0100] In order to confirm the effect of using the hollow fiber membrane module of the present invention and its cleaning method, the following experiments were conducted.

[0101] First, prepare the reference Figure 1 ~ Figure 4 In the hollow fiber membrane module 1 described, in the state where the casing 20 is filled with water, the 3 The flow rate per hour introduces cleaning air into the lower cover 25 . Then, the measured figure 2 The flow rate of the cleaning air distributed by the diffuser holes 35 indicated by symbols P1 to P4 in the figure. The air diffusion holes 35 indicated by symbols P1 and P3 are formed closer to the introduction port 25A than the air diffusion holes 35 indicated by symbols P2 and P4 . The diameter of the diffuser member 30 is set to 230mm, the outer diameter of the partition 32 is set to 164mm, the diameter of the through hole 31C is set to 90mm, the diameter of the outer diffuser holes 35B (symbols P1, P2) is set to 3mm, and the inner dif...

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PUM

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Abstract

This hollow fiber membrane module is provided with: a hollow fiber membrane bundle; a housing that houses the hollow fiber membrane bundle, and that has an inlet through which a cleaning gas for the hollow fiber membrane bundle is introduced; and an aeration member that has a receiving face for receiving the cleaning gas introduced from the inlet, and that has, formed in the receiving face, aeration holes for diffusing the cleaning gas toward the hollow fiber membrane bundle in the housing. The aeration member includes a partition part which partitions space located below the receiving face into an inner peripheral space and an outer peripheral space which surrounds the inner peripheral space and into which the cleaning gas introduced from the inlet is introduced. The aeration holes are configured to diffuse, from the inner peripheral space toward the hollow fiber membrane bundle, at least a portion of the cleaning gas that has spread across the outer peripheral space.

Description

technical field [0001] The invention relates to a hollow fiber membrane module and its cleaning method. Background technique [0002] Conventionally, as disclosed in Patent Document 1, hollow fiber membrane modules have been used for filtration treatment for removing impurities contained in water. According to this hollow fiber membrane module, the raw water (water before filtration) supplied into the casing permeates the hollow fiber membrane, whereby filtered water from which impurities have been removed can be obtained. Here, if the filtration treatment using the hollow fiber membrane is carried out for a certain period of time, the amount of suspended solids (SS; Suspended Solids) contained in the raw water will increase to the surface of the membrane, and the filtration capacity of the hollow fiber membrane will decrease. clean the membrane surface. [0003] Patent Document 1 discloses a hollow fiber membrane module including a hollow fiber membrane bundle, a casing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/02B01D65/02
CPCB01D63/02B01D65/02B01D2313/26B01D2321/185Y02W10/10B01D63/043B01D69/08B01D71/34B01D2321/04B01D2315/20
Inventor 竹下俊光三宅孝治手岛成
Owner KURARAY CO LTD