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No-rinse pipe type membrane assembly for water treatment

A tubular membrane, flush-free technology, applied in osmosis/dialysis water/sewage treatment, membrane technology, semi-permeable membrane separation, etc. The film quality is not easy to control, the preparation process is simple, and the production efficiency is low.

Pending Publication Date: 2018-09-28
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of the existing imported flush-free DF membrane with large diameter, wall thickness, small membrane filtration area, low membrane filament filling density, low membrane porosity, and high operating pressure, resulting in increased energy consumption. problems, while providing a flush-free tubular membrane module for water treatment

Method used

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  • No-rinse pipe type membrane assembly for water treatment
  • No-rinse pipe type membrane assembly for water treatment
  • No-rinse pipe type membrane assembly for water treatment

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Experimental program
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specific Embodiment approach 1

[0020] Specific implementation mode one: as Figure 1 to Figure 5 As shown, a flush-free tubular membrane module for water treatment in this embodiment is composed of a head 1, a membrane tube 2 and a metal clamp 3; the head 1 is composed of a water flow port 4, a head screw cover 5 and The sealing ring 6 is composed of; the membrane tube 2 is composed of several core tubes 7, head screw barrel 8, clear water port 9, membrane shell cylinder 10 and tubular membrane wire 11; the tubular membrane wire 11 is evenly packaged in Inside the core tube 7; the head screw barrel 8 is arranged at both ends of the core tube 7, and the inside of the head screw barrel 8 is provided with reserved channels, and the reserved channels in the head screw barrel 8 at both ends of the core tube 7 are symmetrical The two ends of several core tubes 7 are correspondingly packaged in the reserved channels; the outer side of the head screw barrel 8 is docked with the head screw cover 5, and the head scre...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that: the tubular membrane filament 11 is a flush-free PVDF tubular microporous membrane prepared by a non-solvent phase inversion method or a low-temperature thermal phase inversion method; The performance of the tubular membrane filament 11: OD / ID is 2.0-8.0mm / 1.4-6mm; the porosity is 70-95%; the membrane monofilament strength is greater than 7N; the rinse-free operation is realized at 0.1-0.3MPa, and the membrane surface The average pore size is controlled at 0.001~0.5μm; the operating flux is 300~2000L / m 2 ·h, wash once after 20-30 days of continuous operation, and the membrane flux recovery rate after cleaning is over 96%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the preparation of tubular membrane filaments by non-solvent phase inversion method is carried out according to the following steps:

[0028] 1. Weigh 10 to 30 parts of PVDF, 50 to 100 parts of dispersion medium, 0.1 to 20 parts of organic additive and 0.1 to 10 parts of inorganic additive in parts by weight; the dispersion medium is N,N-dimethylformamide, One or a mixture of several of N,N-dimethylacetamide, N-methyl-2-pyrrolidone and acetone; the organic additive is polyethylene glycol, polyacrylonitrile PAN, cationic surfactant , anionic surfactants, nonionic surfactants, acetone, ethanol, glycerol and polyvinylpyrrolidone of different molecular weights or a mixture of several of them; the inorganic additives are lithium chloride, ammonium chloride, One or a mixture of zinc chloride, lithium nitrate, lithium perchlorate and water;

[0029]2. Add 10 to 30 parts of PVDF, 0.1 to 20 parts...

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Abstract

The invention provides a no-rinse pipe type membrane assembly for water treatment and relates to a no-rinse pipe type membrane assembly for water treatment. The invention aims to solve the problems that the existing inlet no-rinse DF membrane has large diameter and thick wall, the membrane prepared from raw materials with unit mass has small filtering area, low membrane silk filling density, low membrane porosity and high operation pressure, and the energy consumption is increased. The no-rinse pipe type membrane assembly for water treatment consists of a sealing head, a membrane pipe and a metal hoop; the sealing head consists of a water flow port, a sealing head screw cap and a sealing ring; and the membrane pipe consists of a plurality of core pipes, a sealing head screw cylinder, a clean water port, a membrane shell cylinder and pipe type membrane silk. The DF membrane assembly at the inlet can be replaced, and application in the fields of waste water treatment and recycling as well as material separation and concentration instead of the traditional settling pool or filtering pool.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a flush-free tubular membrane module for water treatment. Background technique [0002] With the continuous development of society, the problem of environmental pollution has attracted more and more attention. The continuous discharge of industrial pollution and domestic sewage poses a huge threat to water resources, and the shortage of water resources has become increasingly prominent. Membrane treatment technology is the preferred technology for drinking water treatment in the 21st century. Compared with conventional water treatment technology, it has the advantages of low energy consumption, high separation efficiency, simple process, no need to add additives, and no impact on human health. It is widely used in water treatment and resource protection. , chemical separation and other fields have been widely used. [0003] Due to the existence of problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/06B01D71/34C02F1/44
CPCB01D63/06B01D71/34C02F1/44
Inventor 马玉新张军韩帮军贾学斌赵文军马维超廉金鹏申雯
Owner HEILONGJIANG UNIV
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