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External pressure pillar type hollow fiber films subassemblies capable of air blast

A fiber membrane and membrane module technology, applied in the field of membrane bioreactor and sewage treatment and reuse, can solve the problems of high membrane cleaning cost, low membrane flux, inconvenient membrane cleaning, etc., and achieve good anti-pollution performance, increased Turbulence, the effect of improving the anti-pollution performance

Inactive Publication Date: 2003-10-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main advantage is that the energy consumption is relatively lower than that of the external type, and the land is saved, but its membrane cleaning is inconvenient, the membrane cleaning cost is high, and the membrane flux is relatively small.

Method used

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  • External pressure pillar type hollow fiber films subassemblies capable of air blast
  • External pressure pillar type hollow fiber films subassemblies capable of air blast
  • External pressure pillar type hollow fiber films subassemblies capable of air blast

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Please refer to Figure 3 for the process installation diagram of the external pressure column hollow fiber membrane module used in a separate membrane bioreactor. The height-to-diameter ratio of the outer pressure-column hollow fiber membrane module is 11:1, the length-to-diameter ratio of the hollow fiber membrane is 200:1, and the packing density of the membrane is 829m 2 / m 3 , Membrane area 0.5m 2 . When the mixed liquid sludge concentration in the reactor is 3-10g / L, the membrane flux can reach 20L / m 2 h, the circulating water volume of the circulating pump is 200L / h, the head is 2.0m, and the total efficiency of the unit is 0.49, so the energy consumption of the circulating water pump per unit water treatment is 0.21kw h / m 3 . The cross-flow velocity on the membrane surface can be controlled at 0.04-0.06m / s, which is much lower than the 3-4m / s cross-flow velocity of the known split-type membrane bioreactor process. The aeration rate is 250L / h, the boost press...

Embodiment 2

[0041] Please refer to Figure 4 for a process device diagram of an external pressure column hollow fiber membrane module used in an integrated membrane bioreactor. The height-to-diameter ratio of the outer pressure-column hollow fiber membrane module is 6:1, the length-to-diameter ratio of the hollow fiber membrane is 100:1, and the packing density of the membrane is 702m 2 / m 3 , membrane area 1.0m 2 . When the mixed liquor sludge concentration in the reactor is 3-10g / L, the membrane flux can reach 15L / m 2 h, the aeration rate is 390L / h, the boost pressure is 20kPa, and the blower efficiency is 0.44, so the energy consumption of the blower per unit water treatment is 0.49kw h / m 3 . The gas-water ratio is only 26:1, which is much smaller than the gas-water ratio (40-60:1) of the known integrated membrane bioreactor. The flow rate of the suction pump is 15L / h, the head is 10m, and the total efficiency of the unit is 0.49, so the energy consumption of the suction pump per u...

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Abstract

An external-pressure column type hollow fibre membrane assembly able to be flushed by gas features that the dedicated glass flushing part is arranged among membran fibres at bottom, and the height / diameter ratio of column, the length / diameter ratio of membrane fibre, and the filling density of membrane assembly are reasonably set up for normalizing the moving tracing of gas and water and the flowing state of two-phase stream and making the membrane assembly work in subcritical throughput region. Its advantages are high membrane throughput and less pollution to membrane.

Description

technical field [0001] The invention relates to a membrane module used in a membrane bioreactor, in particular to a structural design and a use method of a hollow fiber membrane module, and belongs to the technical field of membrane bioreactors and sewage treatment and reuse. Background technique [0002] Membrane Bioreactor (MBR) is a new type of efficient sewage treatment and reuse technology that organically combines membrane separation technology with traditional biological treatment technology. In membrane-bioreactor applications, larger area membranes are usually required. The smallest unit for installing a membrane is called a membrane module. There are many forms of membrane modules, which can basically be divided into two categories: tubular and flat. Commonly used membrane modules include flat plate membrane, tubular membrane, capillary membrane, hollow fiber membrane module, etc., and their properties are shown in Table 1-1. [0003] project ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/02C02F3/02
CPCY02W10/10
Inventor 文湘华黄霞俞开昌卜庆杰孙友峰
Owner TSINGHUA UNIV
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