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High-temp. honeycomb ceramic heat storage body and its preparation method

A technology of honeycomb ceramics and regenerators, applied in thermal storage equipment, lighting and heating equipment, heat exchanger types, etc., can solve the problems of large pressure drop, low thermal efficiency, and no high temperature regenerators yet.

Inactive Publication Date: 2003-04-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal storage body used more than 100 years ago is checker bricks, the system is bulky and the thermal efficiency is low
In the 1980s, breakthroughs were made in the development of regenerators, and small-diameter spherical or spot-welded (pebble-like) ceramic bodies appeared, which made the regenerator compact in structure and integrated with the burner, but the pressure drop generated during use was large.
According to new searches, there is no relevant report on the preparation technology of high-temperature heat accumulators with operating temperature ≥ 1400°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: by weight 100 parts of Al 2 o 3 , 1 part of MgO, 3 parts of Suzhou soil, 4 parts of carboxymethyl cellulose, and 0.8 parts of polyvinyl alcohol are mixed according to various ingredients. According to the ratio of material:ball ratio of 1:2, put it into a ball mill for dry ball milling for 48-72 hours. The powder after ball milling is required to pass through a 250 mesh sieve. Take the sieve material and add water according to the ratio of water content of 10% to 16% (depending on the specific dry and wet conditions of the air), add 2.70 parts of glycerin and 2.70 parts of tung oil and stir well as a liquid additive. Add the prepared liquid additive to the solid powder, mix in the mixer for 2-3 hours, then put it into the rough mud mixer and refine it for 2-3 times, then stale for 1 day to get the mud for extrusion molding material.

[0008] Put the stale mud into a vacuum mud refining machine with a vacuum degree of more than 0.95 atm for vacuum refin...

Embodiment 2～ Embodiment 5

[0010] The above ratios are weight share ratios, and the honeycomb ceramic regenerators with different performance parameters can be obtained by referring to the method of Example 1 according to the above ratios.

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Abstract

The present invention relates to a high-temp. cellular ceramic heat-storing body and its preparation technology. Said heat-storing body is made up by using Al2O3, MgO, ZrO2, carboxymethyl cellulose, polyvinyl alcohol, glycerine and tung oil as raw material through the processes of mixing, grinding, drying and sintering. Its fire-resisting temp. is greater than 1790 deg.C, axial compression strength is greater than or equal to 15 MPa, radial compression strength is greater than or equal to 5 MPa, pore wall density is greater than or equal to 2.65g / cu.cm, volume weight is grether than or equal to 0.66g / cu.cm, heat conducting coefficient; room temp. 10.1W / (m.k) and 1300 deg.C is 5.8W / (m.k); specific heal; room temp. is 0.884J / (g.k) and 1300 deg.C is 1.96J / (g.k) and its thermal expansion coefficient is less than 62.5X10 to the minus seventh deg.C(-1).

Description

technical field [0001] The invention relates to a high-temperature honeycomb ceramic regenerator and its preparation technology, belonging to the field of energy-saving and environment-friendly materials. Background technique [0002] Regenerative combustion technology is an ancient and young energy-saving and environmental protection technology in the field of high-temperature kiln combustion. The temperature benefit and thermal efficiency of the regenerative combustion system directly depend on the performance of the heat storage body. The thermal storage body used more than 100 years ago is checker bricks, the system is bulky and the thermal efficiency is low. In the 1980s, breakthroughs were made in the development of regenerators, and small-diameter spherical or spot-welded (pebble-like) ceramic bodies appeared, which made the regenerator compact in structure and integrated with the burner, but the pressure drop generated during use was large. In recent years, the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14F28D20/00
CPCY02E60/142Y02E60/14
Inventor 黄学辉陈文李迪先李大桥徐庆薛红亮尚福亮
Owner WUHAN UNIV OF TECH
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