Structured packing, packing layer structure and application thereof

A technology of structured packing and layer structure, which is applied in the field of rectification, can solve the problems of not installing anti-wall flow ring, wall flow surface tension material separation effect, etc., and achieve the effect of eliminating gap flow, improving the effect of anti-wall flow, and long residence time

Active Publication Date: 2020-09-11
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a structured packing and its application in order to overcome the above-mentioned defects in the prior art. Under the premise of not installing the anti-wall flow ring, from the two aspects of improving the structure of the braided wire and improving the weaving structure of the wire mesh strips Solve the problem of wall flow and poor separation effect on low viscosity or high surface tension materials

Method used

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  • Structured packing, packing layer structure and application thereof
  • Structured packing, packing layer structure and application thereof
  • Structured packing, packing layer structure and application thereof

Examples

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Effect test

Embodiment 1

[0049] In this example, deionized water is used as raw material to separate heavy water. This system has a relatively large surface tension and can generally represent the separation of water-containing mixtures. The separation uses a rectification tower with an inner diameter of 100 mm.

[0050] The materials of the main wire and the auxiliary wire of the winding silk thread are respectively 304 stainless steel and copper, the wire diameters of the main wire 1 and the auxiliary wire 2 are 0.22 mm and 0.04 mm respectively, and the winding method of the main wire 1 winding the auxiliary wire 2 is adopted (see figure 2 ), the pitch of the main wire 1 is 0.28mm, the screen weaving method adopts twill weaving, reverse arrangement (see Figure 4 ). The wire mesh strips are made by cutting the above-mentioned wire mesh, the weaving mesh number of the area with a width of 10 mm on both sides of the horizontal direction is 100 mesh, the weaving mesh number of the middle part of the c...

Embodiment 2

[0055] In this embodiment, a mixture of chlorotrifluoroethylene and chlorodifluoroethane is used as a raw material to separate chlorotrifluoroethylene. This system has a low viscosity and can generally represent the separation of halogenated hydrocarbons, especially the separation of chlorofluorocarbons with carbon 5 and below. The separation adopts a rectification tower with an inner diameter of 300 mm.

[0056] The main wire 1 and auxiliary wire 2 of the winding wire are made of phosphor bronze and 316L stainless steel respectively. The wire diameters of the main wire 1 and the auxiliary wire 2 are 0.35mm and 0.03mm respectively, and the winding method of the main wire 1 and the auxiliary wire 2 is adopted ( see figure 1 ), the pitch of the main wire 1 is 0.78mm, the wire mesh weaving method adopts twill weaving, and the arrangement is cis (see image 3 ). The wire mesh strips are made by cutting the above-mentioned wire mesh, the mesh number of the 50 mm wide area on both...

Embodiment 3

[0061] In this example, a mixture of n-heptane and methylcyclohexane is used as a raw material to separate n-heptane as an example. The surface tension and viscosity of this system are moderate, which can generally represent the separation of general organic matter. Separation adopts a rectification column with an inner diameter of 500mm.

[0062] The main wire 1 and auxiliary wire 2 of the winding wire are made of 316L stainless steel. The wire diameters of the main wire 1 and the auxiliary wire 2 are both 0.3 mm. The main wire 1 is wound around the auxiliary wire 2. The pitch of the main wire 1 is 0.35 mm, the wire mesh weaving method adopts plain weave, arranged in parallel. The wire mesh strips are made by cutting the above wire mesh, and the mesh number of the 30 mm wide area on both sides of the horizontal direction is 70 mesh, and the mesh number of the middle part of the strip sheet is 60 mesh. A circular hole with a diameter of 2 mm is opened in the middle of the wir...

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Abstract

The invention provides structured packing and a packing layer structure which are applied to separation of substances with relatively low viscosity or relatively high surface tension. The structured packing is formed by corrugating, stamping, cutting and binding silk screen strips; the silk screen strip piece is formed by weaving spiral winding type double-strand silk threads, is of a non-uniformweaving density structure and comprises high weaving density areas located on the two sides of the silk screen strip piece and with the width being a and low weaving density areas located in the middle of the silk screen strip piece, thereby forming the weaving density area distribution of a dense-sparse-dense structure. Compared with the prior art, on the premise that no wall flow prevention ringexists, the problems of wall flow and poor separation effect on low-viscosity or high-surface-tension materials are solved from the two aspects of improving the structure of the woven silk threads and improving the woven structure of the silk screen strip pieces; a longitudinal wall flow prevention structure is adopted to replace a transverse structure, so that a wall flow prevention area is increased, the wall flow prevention effect is improved, and gas phase is prevented from flowing in a gap between the outer wall of the filler and the inner wall of the tower.

Description

technical field [0001] The invention relates to the technical field of rectification, in particular to a structured packing, a packing layer structure and an application thereof. Background technique [0002] Structured packing is different from random packing. It is a kind of geometric shape, arranged in a uniform geometric pattern in the tower, and neatly stacked. The outer side is usually fixed by two rings with a certain width. 40mm ~ 300mm. It stipulates and improves the gas-liquid flow path, reduces the pressure drop, but at the same time can provide more specific surface area, so as to achieve higher mass transfer and heat transfer effects. Therefore, since the appearance of structured packing in the last century, it has received attention. Structured packing can be divided into corrugated type and non-corrugated type according to the shape of the packing strips, among which the corrugated packing strips have regular peak and trough changes, and this type of structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/32B01D3/14
CPCB01D3/14B01J19/32B01J2219/32213
Inventor 李瑜哲艾波吴高胜许保云王世忠包春凤
Owner SHANGHAI RES INST OF CHEM IND
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