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Wall liquid film and wall-free liquid film alternate structured filler adapting to viscous absorbent

A technology of structured packing and absorbent, applied in chemical/physical/physicochemical processes, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of not changing the overall macrostructure of corrugated packing, restrictions on the use of viscous absorbents, and unproposed To achieve the effect of improving anti-clogging performance, widening the viscosity range and increasing flux

Inactive Publication Date: 2013-07-10
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned patents adjust the packing structure and improve the performance of the packing from many aspects such as improving the liquid distribution, strengthening the liquid phase turbulence, and utilizing both sides of the liquid film. Enhanced mass transfer, thus limiting the use of viscous absorbents

Method used

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  • Wall liquid film and wall-free liquid film alternate structured filler adapting to viscous absorbent
  • Wall liquid film and wall-free liquid film alternate structured filler adapting to viscous absorbent
  • Wall liquid film and wall-free liquid film alternate structured filler adapting to viscous absorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Oxygen desorption experiment, the liquid viscosity is about 1mPa.s, the tower diameter is 190mm, the packing used is the straight channel vertical plate structured packing of the present invention, and the specific surface area of ​​the packing is 250m 2 / m 3 , the height of the packing layer is 500mm, the height of the packing plate is 125mm, the groove width of the liquid collection-primary distribution part on each piece of packing is 3mm, the groove depth is 8mm, the number of liquid uniform distribution parts is 2, the spacing is 15mm, and the proportion of holes in the total packing 25% of the area. The width of the tongue-shaped protrusion structure is 8mm, the length is 20mm, and the number is 4, which are evenly distributed near the four corners of the packing sheet. The liquid spray density is 10~38m 3 / (m 2 .h). The average number of theoretical plates obtained is 3-4 pieces / m, which greatly improves the separation efficiency compared with 2-3 pieces / m of...

Embodiment 2

[0048] Glycerin aqueous solution cold model test, the liquid viscosity is 17mPa.s. Packed column size and packing parameters are as in Example 1. The liquid spray density is 10~30m 3 / (m 2 .h). at 15m 3 / (m 2 .h), 22m 3 / (m 2 .h), 30m 3 / (m 2 .h) under the spray density, within the normal operating range, the average pressure drop of the straight channel vertical plate structured packing is only 54.4%, 39.6%, 25.5% of the wire mesh corrugated packing, and 31.5% of the plastic corrugated packing , 16.2%, 6.21%. The flood point F factors of the straight channel vertical plate structured packing are 2.48, 1.57, and 1.50 times that of the wire mesh corrugated packing, and 2.48, 1.57, and 1.50 times that of the plastic corrugated packing. The comparison shows that the effect of the present invention is obvious.

Embodiment 3

[0050] High viscosity (concentrated) diethanolamine (DEA) aqueous solution absorbs CO 2 Comparative Experiment. In the gas absorption device, the mass fraction of 5% to 63% and the corresponding viscosity of 1.1 to 25.3mPa.s diethanolamine (DEA) solution absorption volume fraction of 15% to 45% CO 2 Comparative Experiment. Both plates are made of 304 stainless steel plates with a thickness of 0.2mm. The total gas-liquid contact area of ​​the two plates is 2*100*600mm. The test plate 1 is a solid plate, and the test plate 2 is a straight channel vertical channel proposed by the patent of the present invention. Plate structured packing, that is, three holes of 80*80mm are opened on the basis of plate 1, and the distance between adjacent holes is 60mm. In order to ensure stable film formation and uniform liquid distribution when the absorption liquid flows through the holes, vertical guide rods with a diameter of 0.1mm and a distance of 6mm and horizontal diverter rods are weld...

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Abstract

The invention relates to a wall liquid film and wall-free liquid film alternate structured filler adapting to a viscous absorbent. The wall liquid film and wall-free liquid film alternate structured filler is a perpendicular plate structured filler comprising alternate wall-attached films and free films. The wall liquid film and wall-free liquid film alternate structured filler mainly comprises a liquid collection-primary distribution member, a liquid uniform-distribution member, structured solid wall surfaces and holes having a plurality of shapes, and is characterized in that when sprayed liquid flows downward and flows through the wall liquid film and wall-free liquid film alternate structured filler, the liquid enters into the liquid collection-primary distribution member and is subjected to primary distribution and then enters into the liquid uniform-distribution member and is subjected to film-type uniform distribution; and the falling liquid film enters into channels formed from the alternate structured solid wall surfaces and the holes and contacts with gas concurrent flows or gas countercurrent flows. The channels for liquid flowing are regular so that a viscous liquid can smoothly pass through the channels and does not produce foam, emulsification and blocking and thus adaptability to processing liquid viscosity is greatly improved. Through special flow behaviors of the free film and interaction of the free film with the wall-attached film, high-viscosity absorbent mass transfer performances are improved obviously.

Description

technical field [0001] The invention relates to a packing of a separation tower, in particular to a structured packing capable of realizing high-efficiency operation of viscous fluid and preventing clogging. Background technique [0002] Structured packing has always occupied an important position in the separation field because of its advantages such as high separation efficiency, high flux, and low pressure drop. However, the existing corrugated structured packing generally requires the viscosity of the absorbing liquid to be low, otherwise it cannot be used normally. The reason is that the corrugated channel provides a "Z"-shaped flow channel. When the gas-liquid two-phase flows countercurrently at the turning point, it needs to achieve rapid separation, so as to keep the flow channel smooth and ensure the efficiency of absorption. When the viscosity of the absorbent is low, the above requirements can be met. However, when the viscosity of the absorbent increases, the ga...

Claims

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Application Information

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IPC IPC(8): B01J19/32
Inventor 戴干策胡剑光于建国袁猛李迎春罗德勤张家庭刘佳特
Owner EAST CHINA UNIV OF SCI & TECH
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