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Method of membrane separating property of variable pitch, membrane module apparatus and usage

A technology of variable pitch and separation membrane, used in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problem of small membrane filling area, no further consideration of the permeate flow performance and energy consumption of the membrane tube flow channel flow rate change system Influence, not considering the flow rate change system infiltration flow performance and energy consumption and other issues

Inactive Publication Date: 2007-05-23
SECTION OF SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For spiral hollow fiber membranes, single or several fibers are wound on hollow tubes (minimum diameter 3mm). Although all the patent documents on spiral hollow fiber membranes mention various winding methods, they do not consider membrane tube flow. Influence of flow rate change and sharp change of Dean ratio due to infiltration in the channel on permeation flow performance and energy consumption of the system
Due to the need to support the hollow tube in the structure, the membrane filling area per unit volume is small, and the industrialization prospect is not good
As for the woven hollow fiber membrane, there is no patent literature record at present, and there is only one article abroad, and it only puts forward the optimal operation conclusion that the import Dean number ratio is moderate (Di≥5), and the export Dean number ratio must be greater than 1. No further consideration was given to the influence of the flow rate change and the sharp change of the Dean number ratio caused by the permeation in the membrane tube flow channel on the permeation flow performance and energy consumption of the system.

Method used

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  • Method of membrane separating property of variable pitch, membrane module apparatus and usage
  • Method of membrane separating property of variable pitch, membrane module apparatus and usage
  • Method of membrane separating property of variable pitch, membrane module apparatus and usage

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Accompanying drawing 6 is a structural schematic diagram of a Dean vortex spiral flow channel tubular microfiltration membrane module. It can be seen from the figure that the Dean vortex spiral flow channel tubular microfiltration membrane structure assembly includes a separation membrane 1, a membrane housing 3, and a raw material inlet 5 , permeate outlet 6, concentrated solution outlet 7, several parts, wherein: the membrane module raw material inlet 5 and the concentrated solution outlet 7 are respectively located at the inlet end of the tubular membrane module and the end of the pipe relative to the inlet direction, inside the membrane shell 3 It is a separation liquid separation chamber, and the lower end of the membrane shell 3 is provided with a concentrated liquid outlet 7; the separation membrane 1 is a tubular membrane, placed in the membrane shell 3, and is a microfiltration (MF), ultrafiltration (UF) with different opening sizes. ) structure of a hollow filt...

Embodiment 2

[0037] Accompanying drawing 6 is the structure schematic diagram of another embodiment of Dean vortex spiral flow channel tubular microfiltration membrane module, the other parts of this embodiment are the same as the embodiment, the difference is that the spiral circulation channel of the spiral flow channel guide device 2 The section shape is triangular, and it is a variable-pitch helical flow channel, and the pitch ratio of the inlet section and the outlet section is 8-15. According to Embodiments 1 and 2, it can be deduced that the cross-sectional shape of the spiral circulation channel of the spiral flow channel guide device 2 may also be square or semicircular.

Embodiment 3

[0039] Accompanying drawings 7-9 are schematic diagrams of a braided hollow fiber pipe thread connection tubular membrane module. It can be seen from the figure that the braided hollow fiber membrane module includes a braided hollow fiber membrane 18, a membrane casing thread 17, and a separation plate 19. Raw material inlet 20, permeate outlet 21, concentrate outlet 22 and membrane shell 23. Wherein: the separation liquid enters from the raw material inlet 20, and after being separated by the braided hollow fiber membrane 18, the permeate is discharged into the casing 23, and then discharged from the permeate outlet 21, and the separated concentrated liquid is discharged out of the tube through the concentrated liquid outlet 22 , which is characterized in that the braiding pitch of the braided hollow fiber membrane 18 is a variable-pitch helical channel, and the pitch ratio of the inlet section to the outlet section is 3-4.

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Abstract

A membrane module based on the secondary dean eddy reinforced mass transfer features that a helical pitch varying method is used for generating a stronge and stable dean eddy for inlet to outlet, so fully playing its strong mass transfer and separation role. The helical pitch at the inlet of membrane pipe is greater than that at its outlet. It is suitable for millipore filter, ultrafilter and nano-filter.

Description

technical field [0001] The invention relates to a physical separation method, which belongs to the field of membrane separation, and in particular refers to a curved channel type (including spiral type and braided type) hollow fiber membrane module and a method for curved channel PP, PE tubular and candle wick type membrane modules and devices, and their uses. Background technique [0002] Membrane separation technology is an ideal carrier for clean production. Technological progress in membrane technology is rapidly improving our innovation capabilities in many engineering technologies, such as innovating production processes, protecting the ecological environment and public health, and innovating new technologies for sustainable economic development. Membrane Technology as a unit operation plays an increasingly important role in resource recovery, environmental protection, energy production, and environmental monitoring and quality control, and is also a key technology for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/16
Inventor 刘建文湛含辉张晶晶
Owner SECTION OF SCI & TECH DEV