Operation method of hollow fiber membrane module

An operation method and fiber membrane technology, applied in the direction of chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor flushing effect, high energy consumption, and failure to consider waste water recycling, etc., to prevent dead zone areas , the effect of preventing drift

Active Publication Date: 2019-03-05
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at the disadvantages of poor flushing effect, high energy consumption, and failure to consider th...

Method used

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  • Operation method of hollow fiber membrane module
  • Operation method of hollow fiber membrane module
  • Operation method of hollow fiber membrane module

Examples

Experimental program
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reference example 1

[0141] To make hollow fiber membranes with a spherical structure, first make a polymer solution that is dissolved at 160 degrees after mixing 38 parts by mass of fluorinated polyvinylidene chloride fiber homopolymer with an average weight molecular weight of 417,000 and 62 parts by mass of γ-butyrolactone. This polymer solution, using 85% by weight γ-butyrolactone aqueous solution as the hollow part forming liquid, is sprayed from the cover of the double pipe, and 30mm below the cover is provided with 85% by weight γ-butyrolactone aqueous solution The composition is solidified in a cooling bath.

[0142] Next, 14 parts by mass of fluorinated polyvinylidene chloride fiber homopolymer with an average weight molecular weight of 284,000, 1 part by mass of cellulose acetate propionate (manufactured by Istman Chemical Co., Ltd., CAP482-0.5), and N-methyl-2-pyrrolidone Mix 77 parts by mass, sorbitan polyoxyethylene fatty acid ester (manufactured by Sanyo Chemical Industry Co., Ltd., ...

Embodiment 1

[0144] (Hollow fiber membrane module production)

[0145] The hollow fiber membrane of Reference Example 1 was soaked in 30% glycerol aqueous solution by weight for 1 hour and then air-dried. One end of the hollow fiber membrane was sealed with silicone glue (SH 850A / B glue manufactured by Toray Dou Corning Co., Ltd., mixed at a weight ratio of 1:1).

[0146] Case 22 made of polyvinyl chloride resin (inner diameter 77 mm, inner diameter of rectifier outer periphery 90 mm, length 1900 mm, inner diameter of discharge port on case side 24 mm), rectifier 29 (outer diameter 75 mm, inner diameter 71 mm), hollow tube 31 (outer 24mm diameter, 20mm inner diameter), the area bonded with pouring filler, pre-filed with sandpaper (#80) and degreased with ethanol.

[0147] To the water-producing end on the upper side of the assembly of the housing 22 ( Figure 13 The end on the right end) on the sealing side is equipped with hollow fiber membranes, and a solidification cover 35 at the per...

Embodiment 2

[0166] 12 first rectifying holes with a height of 10 mm and a width of 8 mm (rectangular) are uniformly arranged on the surface of the rectifying cylinder for pouring and filling at the lower side of the pouring and filling part 23 of the module water production end. Adopt 0.2m / s liquid phase and 0.2m / s gas phase mixed positive flushing method. The positive flushing time is 120s. Positive flush water flow to raw water tank. After the positive flushing, perform membrane filtration with a flux of 80LMH and a filtration time of 120min, and backwash after filtration. After backwashing, the liquid in the module is emptied, and then the 0.2m / s liquid phase and 0.2m / s gas phase are mixed to perform a circular operation of positive flushing, filtration, and backflushing. Others are the same as in Example 1. The turbidity removal rate of the hollow fiber membrane module can be Reached 93%, as shown in Table 1 for details.

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Abstract

The invention relates to an operation method of a hollow fiber membrane module. The operation method comprises the following steps: performing the forward washing at a primary side, performing the membrane filtering of raw water, and performing the back washing for water produced by the filtering of the secondary side, wherein the forward washing at the primary side comprises liquid-phase flow orgas/liquid mixed-phase flow washing. By adopting the operation method, the excellent turbid discharging performance of the module is ensured, while the broken problem of a membrane wire can be effectively prevented. The module has a rectifying effect of fluid flowing by the outer side of a hollow fibrous membrane towards a central part of a radial direction at the lower side of an irrigation filling part of a water production end and flowing from the center part of the radial direction at the lower side of the irrigation filling part of water production to the outer side of the radial direction in a radioactive manner when in the primary side forward washing. By adopting the operation method of the hollow fiber membrane module, the bias flow phenomenon of the upper part of the module in case of the primary side forward washing can be effectively prevented, and the turbid discharging performance of the module can be further improved.

Description

technical field [0001] The invention relates to an operation method suitable for a hollow fiber membrane module and a module applied to high-pollution raw water treatment. Background technique [0002] In recent years, with the improvement of water resources utilization requirements and the development of membrane technology, hollow fiber membrane technology has been paid more and more attention to the application of hollow fiber membrane technology in the field of water treatment because of its features of saving energy consumption, saving space, and stabilizing filtered water quality. , especially in high-pollution raw water, such as high-turbidity surface water, and the application of industrial wastewater treatment is increasing. [0003] However, after long-term operation of the hollow fiber membrane module, the intercepted substances such as inorganic substances, organic substances, bacteria, and biofilms will inevitably form a fouling layer on the membrane surface or ...

Claims

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Application Information

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IPC IPC(8): B01D65/02B01D61/14B01D61/00B01D63/02C02F1/44
CPCB01D61/00B01D61/145B01D63/02B01D65/02C02F1/44C02F1/444B01D2321/04B01D2321/02Y02W10/10
Inventor 张金龙常春杨瑜芳小林敦
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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