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Silicon carbide foamed ceramics corrugated structured packing and preparation method and applications thereof

A foamed ceramic and structured packing technology, applied in ceramic products, chemical instruments and methods, applications, etc., can solve the problems of high equipment construction and maintenance costs, low service life, unfavorable energy saving, etc. The effect of reducing and saving maintenance costs

Inactive Publication Date: 2011-10-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a silicon carbide foam ceramic corrugated structured packing and its preparation method and application, which can well solve the common problems of low efficiency, unfavorable energy saving, low service life, high equipment construction and maintenance costs existing in the existing structured packing. question

Method used

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  • Silicon carbide foamed ceramics corrugated structured packing and preparation method and applications thereof
  • Silicon carbide foamed ceramics corrugated structured packing and preparation method and applications thereof
  • Silicon carbide foamed ceramics corrugated structured packing and preparation method and applications thereof

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Effect test

Embodiment 1

[0040] Firstly, using silicon carbide foam ceramics as the material, according to the corresponding geometric characteristics (see Table 1), the polyurethane sponge foam is pre-cut into the required corrugated shape, and then the silicon carbide foam ceramic filler unit plate precursor is prepared. Then, the same kind of slurry is used as the adhesive, bonded according to the structure requirements of the structured packing, then pyrolyzed, machined, and sintered to obtain a new type of silicon carbide foam ceramic corrugated structured packing. The packing disc diameter is 100mm, and the disc height is 100mm.

[0041] In the silicon carbide foam ceramic corrugated structured packing of the present invention, the packing units thereof are connected at one time to form a packing disc during the preparation process of the foam ceramic corrugated plate, which is firm in combination, easy to install and stable in structure. The connection process is as follows: after the precursor...

Embodiment 2

[0058] Preparation of Φ315×200mm silicon carbide foam ceramic corrugated type II structured packing ( image 3 ), carried out the pilot-scale scale-up experiment on the pilot-scale rectifying tower, and compared with the wire mesh BX structured packing (material is 316L), the experimental material adopted is 10wt% alcohol aqueous solution, and the height of both packings is 2 meters , Total reflux operation, the results show that the theoretical plate number of BX structured packing is 2.9 pieces / m, while the silicon carbide foam ceramic corrugated type II structured packing can reach 5.1 pieces / m, an increase of more than 75%.

Embodiment 3

[0060] (1) Using HCl acid as the medium to study and compare the corrosion resistance of the material, configure three different concentrations of HCl acid solution (5wt%, 10wt%, 25wt%), take silicon carbide foam ceramic corrugated structured packing and After the BX packing (316L) was soaked in three different concentrations of solutions for three weeks, the mass change rate before and after was measured, showing that no corrosion signs were found in the silicon carbide foam ceramic corrugated structured packing, while the BX packing (316L) lost weight obviously, and the local area Has been rotten, and even holes.

[0061] (2) Using H 2 SO 4 Acid was used as the medium to study and compare the corrosion resistance of materials, and three different concentrations of H 2 SO 4 Acid solution (respectively 5wt%, 20wt%, 35wt%), silicon carbide foam ceramic corrugated structured packing and BX packing (316L) were soaked in three different concentration solutions for three weeks, ...

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Abstract

The invention relates to the field of structured packing, and in particular relates to silicon carbide foamed ceramics corrugated structured packing and a preparation method and applications thereof. The packing is formed by the stacking and combining silicon carbide foamed ceramics packing units of corrugated geometrical shapes; the packing unit plates are silicon carbide foamed ceramics of three-dimensional communicated network structures; the foam pore size is between 10PPi and 80PPi; the volume fraction can be controlled between 10% and 70%; and the corrugated shape of the packing units are triangles or smooth waves. The organic foam is cut into required corrugated shapes in advance, and then is subjected to press molding or double-roll extrusion molding, the deformation problem of compression and elongation of foam holes in the molding process is solved well, the shape of the foam holes of the obtained packing units is regular, and the original three-dimensional communicating structure of the organic foamed templates is maintained preferably; and the structured packing and the preparation method provided by the invention are suitable for a plurality of operation processes, especially are suitable for the separation process of systems difficult to be separated, adapt to the requirements of high efficiency and low energy consumption, and are especially suitable for the separation process of various high-corrosion systems.

Description

Technical field: [0001] The invention mainly relates to the field of structured packing, specifically a novel silicon carbide foam ceramic corrugated structured packing and its preparation method and application, which are suitable for various separation process operations and can be widely used in oil refining, petrochemical, light chemical, air separation, Trichlorosilane purification, coal chemical industry, food, pharmaceutical, metallurgy and other industrial fields, especially suitable for the separation process of difficult-to-separate substances, meet the needs of high efficiency and low energy consumption, especially suitable for the separation process of various strongly corrosive substances . Background technique: [0002] The application of chemical separation is very extensive. Among them, rectification technology has always been the main and preferred key common technology. It is an important means of product separation and purification, and has a decisive impa...

Claims

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Application Information

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IPC IPC(8): B01J19/32B01D3/00C04B35/565C04B38/00C04B41/81B28B1/29B28B3/12
Inventor 张劲松田冲杨振明曹小明刘强李鑫钢高鑫
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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