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Strong-effect regular packing without wall flow

A structured packing, powerful technology, applied in chemical/physical/physicochemical processes, chemical instruments and methods, chemical/physical processes, etc., can solve the difficult effective mass transfer area and cannot fundamentally solve the wall flow effect and other problems, to achieve the effect of redistribution, solve the problem of wall flow in the tower, and wide operating flexibility

Inactive Publication Date: 2009-01-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above measures are a kind of correction or compensation for the wall flow generated by the packing layer. The liquid collected and reintroduced into the packing layer will be concentrated in the wall flow circle or the inner annular area of ​​the band ring, and it is difficult to really enter the effective space of the packing. Mass transfer area, so the wall flow effect cannot be solved fundamentally

Method used

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  • Strong-effect regular packing without wall flow
  • Strong-effect regular packing without wall flow
  • Strong-effect regular packing without wall flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Methanol-water rectification separation, the diameter of the tower is 1000mm, and the packing of 10m is used. The packing used is the powerful non-wall flow corrugated structured packing of the present invention. The number N of corrugated channels on each corrugated plate is 4, α and β are both 45°, and the corrugated channels are distributed with equal lengths. After the surface of the corrugated sheet is treated accordingly, it is fixed and assembled into a structured packing disk with bands. The structured packing has a specific surface area of ​​600m 2 / m 3 , the separation index provided is about 5-6 theoretical plates / m, and the separation index for methanol is: feed methanol composition is 38% (weight percent), and the rest is water. The composition of methanol obtained by separation at the top of the tower is 99.9%, and the content of methanol in the bottom component is about 0.001%. Observation with an industrial endoscope reveals that with the structured p...

Embodiment 2

[0032] The basic parameters are the same as in Example 1, but the angle α between the corrugated sheet and the axial center line of the packing is adjusted to 35°, and the specific surface area of ​​the structured packing can reach 650-700 m 2 / m 3 , due to the adjustment of the α angle, the arrangement of the corrugated channels is more compact, the total number of corrugated channels with the same packing height is higher than that of Example 1, the residence and mixing degree of the materials on it are improved, and the separation efficiency of the packing is improved compared with the traditional packing Nearly 17%, which is 1-3% higher than that of the packing of the present invention used in Example 1, and the separation index provided by the structured packing can even reach 7 theoretical plates / m.

Embodiment 3

[0034] Each basic parameter is the same as embodiment 1, but adopts the straight line of 8mm long as transition (such as Figure 5 ), with the help of industrial endoscope observation, it is found that the liquid can flow vertically downward along the zigzag channel, which greatly eliminates the occurrence of wall flow and other phenomena, and the existence of the transition section prolongs the stay of the liquid in the channel Time, and is conducive to the redistribution of liquid. By comparing the measured data, it is found that relative to the traditional structured packing, the residence time of the liquid in the packing increases by nearly 20%, although the height of the whole tray is increased relative to the novel tray in Example 1 due to the increase of the transition section, but due to The prolongation of the residence time and the redistribution effect of the transition section make the separation efficiency of the whole column not significantly changed compared wi...

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Abstract

The invention discloses a high-performance non wall flow corrugated structured packing which is composed of corrugated silk screens or corrugated plates and a strap or other fastening pieces; the corrugated cross section of the corrugated plate takes a shape of a triangle or a circular arc, a plurality of short zigzag channels are connected along opposite direction to form one corrugated plate, a 'fold line'-shaped corrugated channel is formed by combination, thus a liquid channel can integrally deflect along a vertical and downward trend, the included angle Alpha between the corrugated plate and the longitudinal center line of the packing is 0-60 degrees. The high-performance non wall flow corrugated structured packing has the advantages that: when the fluid on a packing box flows downwards through the 'fold line'-shaped corrugated channel, the flow direction can be repeatedly changed for a plurality of times in one corrugated plate, thus prolonging the staying time of the fluid; the channel is short, narrow and zigzag, which can facilitate redistribution of fluid; even if local packing is staggered between trays, the caused impact can be effectively relieved due to flow deflection and rapid redistribution in the short channel, therefore, the corrugated structured packing can effectively solve the problems of wall flow, bias flow, etc.

Description

technical field [0001] The patent of the present invention relates to the packing of the separation tower, specifically, it is a kind of powerful corrugated structured packing without wall flow. Background technique [0002] Corrugated structured packing is a new type of high-efficiency packing with a monolithic structure. It is a disc-shaped packing composed of many corrugated thin plates stacked in reverse and vertically. The diameter is slightly smaller than the inner diameter of the tower shell. The angle between the corrugations of the conventional corrugated structured packing and the axial center line of the packing is generally 30° or 45°, and the corrugations are reversely stacked, and the upper and lower adjacent two-layer trays are staggered and reversely stacked at an angle of 90°. The traditional single-layer corrugated packing has compact structure, large specific surface area, and staggered arrangement is beneficial to gas-liquid contact and liquid redistribut...

Claims

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Application Information

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IPC IPC(8): B01J19/32
Inventor 耿皎彭璟王明明张锋吴有庭
Owner NANJING UNIV
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