X-spiral-flow wound membrane diversion screen

A roll-type membrane and separator technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., to achieve the effects of enhancing the mass transfer capacity of the raw liquid, reducing the contact, and increasing the effective use area

CN102600728BInactive Publication Date: 2014-03-26王旭东
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an X-spiral-flow wound membrane diversion screen, which consists of a plurality of layers of flow passages which are overlapped together. Each layer of flow passages consists of longitudinal ribs. The layers of flow passages are in parallel with each other. Adjacent layers of flow passages are staggered in an X shape, i.e. the longitudinal ribs of the adjacent layers are connected in an X staggered and overlapped way to facilitate conversion from laminar flow to turbulent flow and eliminate influence caused by concentration polarization. Since the X-spiral-flow wound membrane diversion screen consists of a plurality of layers of flow passages consisting of longitudinal ribs, transverse ribs are not used and the scheme is different from the existing schemes, not only can the area of contact with a membrane surface be reduced and the effective available area of a separation membrane be increased, but also a dead corner is not produced, the disturbance of the laminar flow can be facilitated to convert the laminar flow to the turbulent flow under the secondary flow facilitating effect of an X spiral flow, the driving force and the mass transfer effect of solute diffusion are enhanced and the mass transfer capacity of primary liquid is greatly improved. The efficiency of membrane separation is improved, the volumetric percolate flux of the separation membrane is improved, the deposition of pollutants is avoided and the defects of the existing technical scheme are avoided.
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Description

technical field

[0001] The present invention relates to the technical field of membrane separation, in particular to a method for high-purity separation applications (such as in food, medical and pharmaceutical industries), environmental protection sewage treatment or seawater desalination industries, using engineered osmosis methods (such as: reverse osmosis, Forward osmosis) Forward osmosis, reverse osmosis membrane, nanofiltration membrane, ultrafiltration membrane, microfiltration membrane, electrodialysis membrane, pervaporation membrane, membrane bioreactor and other diversion screens for separation and extraction operations. Background technique

[0002] At present, the structure of various spiral-wound membranes is roughly the same. They are all stacked with a membrane bag with a built-in porous diversion net and a diversion net that acts as a spacer diversion, and is wound in a hollow porous tube—the central product collection on the tube, and then seal the connecti...

Examples

Embodiment Construction

[0032] The embodiment will be further described in conjunction with the accompanying drawings, as Figure 5 to Figure 9 As shown, the X swirl roll membrane diversion screen of the present invention is composed of a lower flow channel 9 and an upper flow channel 10, the upper flow channel 10 is composed of a plurality of upper longitudinal ribs 8 parallel to each other, and the lower flow channel 9 is composed of multiple The lower longitudinal ribs 7 of the strips are parallel to each other. The flow direction of the raw liquid in the flow channel constitutes the vector direction of the flow channel. The axial line 5 is the projection of the central axis of the roll film on the diversion screen. The axial line 5 is parallel to the central axis of the roll film, which is used to illustrate the flow guide The virtual line of the grid structure. The angle between the lower longitudinal rib 7, the upper longitudinal rib 8 and the axial line 5 are greater than and less than ...