Ceramic heat exchange tube and preparation method thereof

A technology of heat exchange tubes and ceramics, which is applied in the field of ceramic heat exchange tubes and its preparation, can solve the problems of low wear resistance, low bending strength, unsatisfactory anti-seismic performance, and insufficient service life, etc., and achieve improved thermal shock resistance , promote the sintering densification process, and accelerate the effect of sintering speed

Inactive Publication Date: 2019-07-26
ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is that the anti-seismic performance is not ideal, and the wear resistance and bending strength are not high, resulting in insufficient service life. Alumina ceramics have the advantages of high mechanical strength, good thermal conductivity, good high-temperature creep performance, and good high-temperature chemical stability. Lower cost, but less thermal shock resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A ceramic heat exchange tube, comprising the following raw materials in mass fractions: 83 parts of alumina, 18 parts of cordierite, 7 parts of aluminum titanate, 0.3 parts of sodium hexametaphosphate, 3 parts of MgO, ZrO 2 2 parts, MnO 2 3 copies, B 2 o 3 2 parts, CuO2 parts, TiO 2 4 parts.

[0026] The preparation method of the above-mentioned ceramic heat exchange tube comprises the following steps:

[0027] 1) Raw material pretreatment: Mix the above-mentioned raw material powders in proportion to obtain a mixture, put the mixture into a ball mill tank, add water and ceramic balls, and perform wet ball milling, pour out the ball-milled materials, and dry them. Put it into an electric furnace, calcinate at 800°C for 3 hours, cool to room temperature, pass the powder through a 300-mesh sieve, and set aside, wherein the mass ratio of the mixture to water and ceramic balls is 1:1:1.5, and the ball milling time is 24 hours ;

[0028] 2) Preparation of ceramic slurr...

Embodiment 2

[0032] A ceramic heat exchange tube, comprising the following raw materials in mass fractions: 70 parts of alumina, 20 parts of cordierite, 5 parts of aluminum titanate, 0.4 parts of sodium hexametaphosphate, 2 parts of MgO, ZrO 23 parts, MnO 2 1 copy, B 2 o 3 3 parts, CuO 1 part, TiO 2 5 servings.

[0033] The preparation method of the above-mentioned ceramic heat exchange tube comprises the following steps:

[0034] 1) Raw material pretreatment: Mix the above-mentioned raw material powders in proportion to obtain a mixture, put the mixture into a ball mill tank, add water and ceramic balls, and perform wet ball milling, pour out the ball-milled materials, and dry them. Put it into an electric furnace, calcinate at 900°C for 2 hours, cool to room temperature, pass the powder through a 280-mesh sieve, and set aside, wherein the mass ratio of the mixture to water and ceramic balls is 1:2:2, and the ball milling time is 20 hours ;

[0035] 2) Preparation of ceramic slurry:...

Embodiment 3

[0039] A ceramic heat exchange tube, comprising the following raw materials in mass fractions: 90 parts of alumina, 15 parts of cordierite, 10 parts of aluminum titanate, 0.2 parts of sodium hexametaphosphate, 6 parts of MgO, ZrO 2 2 parts, MnO 2 3 copies, B 2 o 3 1 part, CuO3 part, TiO 2 3 copies.

[0040] The preparation method of the above-mentioned ceramic heat exchange tube comprises the following steps:

[0041] 1) Raw material pretreatment: Mix the above-mentioned raw material powders in proportion to obtain a mixture, put the mixture into a ball mill tank, add water and ceramic balls, and perform wet ball milling, pour out the ball-milled materials, and dry them. Put it into an electric furnace, calcinate at 900°C for 2 hours, cool to room temperature, pass the powder through a 260-mesh sieve, and set aside, wherein the mass ratio of the mixture to water and ceramic balls is 1:1.5:2, and the ball milling time is 22 hours ;

[0042] 2) Preparation of ceramic slurr...

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PUM

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Abstract

The invention provides a ceramic heat exchange tube and a preparation method thereof, and relates to the technical field of heat exchange equipment. The ceramic heat exchange tube comprises, by weight, 70-90 parts of aluminum oxide, 5-25 parts of cordierite, 5-10 parts of aluminum titanate, 0.2-0.4 part of sodium hexametaphosphate, 2-6 parts of MgO, 1-3 parts of ZrO2, 1-3 parts of MnO2, 1-3 partsof B2O3, 1-3 parts of CuO and 2-6 parts of TiO2. The ceramic heat exchange tube is higher in relative density, good in thermal shock resistance and higher in normal temperature heat conductivity. Thealuminum oxide, the cordierite and the aluminum titanate are used as main raw materials, the MgO, the ZrO2, the MnO2, the B2O3, the CuO and the TiO2 serve as sintering aids, the sodium hexametaphosphate serves as a dispersing agent, and the comprehensive performance of the ceramic heat exchange tube can be furthest improved.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment, in particular to a ceramic heat exchange tube and a preparation method thereof. Background technique [0002] With the continuous development of the world economy, human society has an increasing demand for energy. However, petrochemical energy reserves are limited, and nuclear energy and solar energy have not made much progress. The shortage of energy has always been the bottleneck of economic development. In this context, saving energy, reducing energy consumption, improving fuel utilization, and recycling waste heat from waste flue gas have become hot spots in industrial production. A heat exchanger, also known as a heat exchanger, is a device that transfers part of the energy of a hot fluid to a cold fluid. Heat exchangers play a pivotal role in industrial production. Therefore, the development and application of new heat exchangers with high efficiency and low cost is a goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10
CPCC04B35/10C04B2235/3206C04B2235/3232C04B2235/3244C04B2235/3267C04B2235/3281C04B2235/3409C04B2235/3481C04B2235/447C04B2235/6562C04B2235/6567C04B2235/77C04B2235/9607
Inventor 张凌霞胡西芹张志峰刘红军
Owner ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD
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