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Filtration apparatus

a filtration apparatus and filtration tube technology, applied in the field of sucking filtration tubes, can solve the problems of reducing the penetration flow rate and clogging of membranes, and achieve the effects of stable filtration function, stable filtration function, and efficient and reliable removal of suspended components

Inactive Publication Date: 2011-08-18
SUMITOMO ELECTRIC FINE POLYMER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively removes suspended components from membrane surfaces and between membranes, stabilizing filtration performance and reducing the need for additional fixing members, while minimizing air usage and maintaining high filtration efficiency over time.

Problems solved by technology

In both treatment of water purification and of the highly polluted water, with the elapse of time in which filtration treatment is carried out by using the filtration apparatus in which the membrane module is used, a suspended component contained in the to-be-treated liquid deposits on membrane surfaces or between membranes, which causes the membranes to be clogged.
That is, hollow fiber membranes adhere to each other and integrate with each other through a deposit, and the effective membrane area of the hollow fiber membranes inside the membrane module decreases, which leads to a decrease in a penetration flow rate.

Method used

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Examples

Experimental program
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Effect test

example 1

[0217]As the hollow fiber membrane 10, drawn hollow fiber membrane made of PTFE having an inner diameter of 1 mm, an outer diameter of 2 mm, a porosity of 75%, a pore diameter of 0.45 μm, and an effective length of 1500 mm is used. One hollow fiber membrane module 1 has 945 hollow fiber membranes. As shown in FIG. 21(B), as the holding member 25, a plate, made of PVC resin, having a dimension of 150 mm×150 mm (length×breadth) through which 945 through-holes having an outer diameter of 3 mm were formed and having a thickness of 5 mm was used.

[0218]Both ends of one double folded hollow fiber membrane were inserted through a pair of the adjacent through-holes with the hollow fiber membrane forming a U shape at the central position thereof.

[0219]After both ends of the U-shaped hollow fiber membranes were inserted into a water-collecting header 13 made of ABS resin having a groove formed therein, with both ends thereof bundled and arranged squarely, both ends thereof were fixed with resi...

example 2

[0222]As shown in FIGS. 22(A), 22(B), and 22(C), the hollow fiber membrane 10 was used similarly to the example 1. Instead of the holding member 25 of the example 1, the sectionally rectangular rod for folding use 70 made of ABS resin was used. By using the rod 70, the hollow fiber membrane 10 was bent so that it was U-shaped. After both ends of the U-shaped hollow fiber membranes were inserted into the water-collecting header 13 made of ABS resin having a groove formed therein, with both ends thereof bundled and arranged squarely, both ends thereof were fixed with resin (urethane resin) for fixing use with both ends thereof kept open to form the fixing member 11 of the hollow fiber membrane module. Thereby the module was formed. The number of the hollow fiber membranes was set to 945, similarly to the example 1. Sucking filtration was performed by setting other conditions similarly to those of the example 1.

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PUM

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Abstract

A filtration apparatus for performing solid-liquid separation by immersing a plurality of hollow fiber membranes in a to-be-treated liquid containing a suspended component so that the treated liquid permeates the hollow fiber membranes. The filtration apparatus includes the hollow fiber membranes folded double; a treated liquid collection means communicated with an open-side end of each of the hollow fiber membranes; a holding member for holding a bent portion at an other-end side of each of the hollow fiber membranes with a gap formed between the bent portion of each of the hollow fiber membranes and the holding member; and a gas-jetting means for jetting a cleaning gas from the other-end side of each of the hollow fiber membranes to the open-side end of each of the hollow fiber membranes. A gap for flowing the gas jetted by the gas-jetting means is formed between the hollow fiber membranes held by the holding member and the holding member or / and on at least one part of gaps between the hollow fiber membranes.

Description

TECHNICAL FIELD[0001]The present invention relates to a sucking filtration apparatus of an immersion type or a filtration apparatus of an external pressure type for performing solid-liquid separation by immersing a large number of hollow fiber membranes arranged side by side in a to-be-treated liquid containing a suspended component so that treated liquid permeates the hollow fiber membranes, and more particularly to a filtration apparatus including cleaning means having a simple construction for removing the suspended component which has attached to the hollow fiber membranes.BACKGROUND ART[0002]A membrane module in which a plurality of hollow fiber membranes is disposed collectively and circularly and one end or both ends of the hollow fiber membranes is fixed by a fixing member with the one end or both ends of the hollow fiber membranes open to form a water collection portion is mounted and used for the sucking filtration apparatus of the immersion type or the filtration apparatu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D65/02B01D63/02
CPCB01D61/18B01D63/024B01D63/043B01D65/02B01D2313/06C02F2103/20B01D2313/26B01D2315/06B01D2321/185C02F1/444C02F3/1273B01D2313/21Y02W10/10B01D63/0241B01D71/36B01D69/08
Inventor MORITA, TOORUKAWABE, SHINSUKE
Owner SUMITOMO ELECTRIC FINE POLYMER INC
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