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Spherical porous ceramic packing used inside packing tower and preparation method thereof

A technology of porous ceramics and packed towers, applied in the field of packed towers, can solve the problems of low cost, reduce surface utilization, increase fluid resistance, etc., achieve high separation efficiency, solve inner surface shielding, and improve separation effect.

Inactive Publication Date: 2014-05-14
NANTONG SUTONG SEPARATION ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Structured packing is favored by people because of its high mass transfer efficiency and low resistance, but its obvious disadvantages are that it is expensive and difficult to repair, load and disassemble.
Bulk packing is just the opposite. It is low in cost and easy to overhaul, fill and disassemble, but it also has defects, such as Raschig rings and VSP rings. When filling in the tower, the inclination angle between the axis direction and the horizontal plane is random between 0°-90° distribution, in some directions, a portion of the inner surface is shielded, reducing surface utilization and increasing fluid resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The spherical porous ceramic packing used in the packed tower, its preparation method is:

[0014] Step one: Making blanks: using aluminum-silicon acid-resistant ceramics with acid resistance greater than 90% as the main raw material, coarsely pulverizing into fine pieces, ball milling, sieving, filtering mud, smelting mud, aging, scouring, and forming the body into a spherical shape;

[0015] Step two: firing of blanks: the formed blanks are quickly heated to 1400-1430°C within 5 hours, kept for 2 hours, and reduced to 1200-1220°C for 7 hours, and kept for 2 hours to form a porous ceramic structure.

[0016] The fired spherical ceramic filler has a diameter of 5 cm, an open porosity of 55%, an average pore diameter of 3 mm, and a porosity of 80%. It is used to distill volatile organic solvent ethanol, and its theoretical plate number is 8.08, the resolution R value is 0.75, and the corrosion resistance coefficient is 1.1.

Embodiment 2

[0018] The preparation method of spherical porous ceramic filler used in the packing tower is as follows: step 1 blank production: zirconia ceramics are used as the main raw material, coarsely crushed into finely divided shapes, ball milling, sieving, mud filtering, mud smelting, aging, scouring, The green body is shaped into a spherical shape; the second step is the firing of the blank: the formed body is rapidly heated to 1400-1430°C within 5 hours, and kept for 2 hours. When the temperature drops to 1200-1220°C within 5 hours, the temperature is kept for 2 hours to form Porous ceramic structure.

[0019] The sintered spherical ceramic filler has a diameter of 8 cm, an opening rate of 98%, an average pore diameter of 8 mm, and a porosity of 90%. It is used to distill volatile organic solvent ethanol. The theoretical plate number is 8.5, the resolution R value is 0.79, and the corrosion resistance coefficient is 1.2.

Embodiment 3

[0021] The spherical porous ceramic filler used in the packed tower is prepared by the following steps: Step 1 blank production: zirconium dioxide and aluminum oxide composite ceramics are used as main raw materials, and the molar ratio of zirconium dioxide and aluminum oxide is 7: 3. Coarse grinding to finely crushed shape, ball milling, sieving, mud filtering, mud smelting, aging, scouring, and the green body into a spherical shape; step two blank firing: rapid heating of the formed body to 1400-1430 ℃ within 5 hours , Heat preservation for 2 hours, when the temperature drops to 1200-1220 ℃ within 6 hours, heat preservation for 2 hours to form a porous ceramic structure.

[0022] The sintered spherical ceramic filler has a diameter of 6 cm, an open porosity of 90%, an average pore diameter of 6 mm, and a porosity of 85%. It is used to distill volatile organic solvent ethanol, and the theoretical plate number is 8.8, the resolution R value is 0.82, and the corrosion resistance c...

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Abstract

The invention discloses a spherical porous ceramic packing used inside a packing tower and a preparation method of the packing. The packing is characterized in that the diameter of the packing is 5-8cm; the aperture ratio is 55-98%; the aperture is 3-8mm; and the porosity is 80-90%. The spherical porous ceramic material can be also made of a corrosion resisting material, such as aluminum-silicon acid-resisting type ceramic, zirconia ceramic, and zirconium dioxide and aluminum oxide composite ceramic. The preparation method comprises the following steps: 1, manufacturing a blank material, namely, roughly grinding the raw material into refined state, and making a spherical blank; and 2, sintering the blank material, namely, rapidly raising the temperature of the formed blank body to be 1,400-1,430 DEG C within 5 hours, keeping the temperature for at least 2 hours, and keeping the temperature for at least 2 hours when the temperature is reduced to be 1,200-1,220 DEG C so as to form a porous structure. The spherical porous ceramic packing has the characteristics of high number of theoretical plates and high separation efficiency, and is applicable to industrial application.

Description

Technical field [0001] The invention relates to the field of packed towers, in particular to a spherical porous ceramic filler used in the packed tower and a preparation method thereof. Background technique [0002] Packed tower is a widely used gas-liquid mass transfer equipment, which has the advantages of simple structure and easy-to-use corrosion-resistant materials. The ideal packing should provide suitable channels for the gas-liquid two-phase, the gas flow pressure is reduced, the flux is large, and the liquid flow is easy to spread into a liquid film. In addition, it needs to be low-cost, easy to manufacture, and has a certain strength and heat resistance. , Corrosion resistance. There are two types of common packing: bulk packing and structured packing. The former can be piled up randomly in the tower, or it can be built. Structured packing is favored by people because of its high mass transfer efficiency and low resistance, but its obvious disadvantages are that it is...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B35/48C04B35/622
Inventor 葛红军徐丽梅杨伟东邱玉梅沙嘉敏
Owner NANTONG SUTONG SEPARATION ENG & TECH
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