Preparation method of high purity quartz, and quartz tube for low temperature heat exchanger and preparation method thereof

A low-temperature heat exchanger, quartz tube technology, used in glass manufacturing equipment, manufacturing tools, glass molding and other directions, can solve the problems of non-corrosion, viscous dust, etc., to increase high temperature viscosity, strong acid resistance, improve the effect of strength

Active Publication Date: 2014-03-19
连云港市盛昌照明电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to design a quartz glass tube for the condenser tube of the low temperature heat exchanger in order to overcome the problems that the existing copper or stainless steel condenser tube of the low temperature heat exchanger is not resistant to corrosion and sticky dirt. , so that it has high corrosion resistance, and has a high-strength quartz tube

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 1g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high-temperature furnace and bake at 850°C for 8 hours. After roasting, soak for 10 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid and hydrofluoric acid: 3%, 3%, and 3%, respectively. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 3:100, 3:100, 5:100 respectively. NH 3 aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 3g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 900° C. for 7.5 hours. After roasting, soak for 10 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid...

Embodiment 2

[0032] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 5g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high-temperature furnace and bake at 900° C. for 8 hours. After roasting, soak for 7 days in the mixed acid solutions with the concentration of hydrochloric acid, nitric acid and hydrofluoric acid respectively: 4%, 6% and 10%. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 4:100, 6:100, 12:100 respectively. NH 3 aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 7g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 950° C. for 7.5 hours. After roasting, soak for 8 days in the mixed acid solutions with the concentration of hydrochloric acid, nitric acid...

Embodiment 3

[0034] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 10g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high temperature furnace and bake at 1000°C for 6.5 hours. After roasting, soak for 4 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid and hydrofluoric acid: 6%, 10% and 6% respectively. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 5:100, 9:100, 20:100 respectively. NH 3aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 10g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 1050° C. for 6.5 hours. After roasting, soak for 5 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric a...

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Abstract

The invention discloses a preparation method of high purity quartz, and a quartz tube for a low temperature heat exchanger and a preparation method thereof. The preparation method of the high purity quartz provided by the invention mainly comprises the following steps: preparing a quartz powder with particle not more than 40 mesh; adding sodium nitrate into the quartz powder and mixing; conducting high temperature calcination on the quartz powder and soaking the quartz powder with mixed acid; cleaning and drying; adding aluminum nitrate or a hydrate thereof in the quartz powder; and then conducting high temperature calcination, cleaning with mixed acid and drying. The preparation method of the quartz tube for low temperature heat exchanger is as below: adding a binder into the high purity quartz prepared by the above preparation method, mixing, melting at high temperature, and drawing and cutting into a quartz tube. Comparing with the prior art, the high purity quartz prepared by the invention has greatly improved corrosion resistance especially acid resistance, and the quartz tube prepared by the invention gains strengthened corrosion resistance, acid resistance and mechanical strength, and is especially suitable for the low temperature heat exchanger.

Description

technical field [0001] The invention relates to quartz purification, a quartz glass tube and a preparation method thereof. Background technique [0002] With the continuous improvement of the production process and equipment of quartz glass tubes, the application range of quartz tubes has been continuously expanded. At present, in thermal power plants and industrial production, especially for high-sulfur fuels, domestic thermal power plants and industrial production The boiler exhaust gas temperature is generally around 150°C, and some are even as high as 160-170°C. For the low exhaust gas temperature of about 150°C, the waste heat loss is huge, and the existing heat exchanger condenser tubes use copper or Stainless steel pipes are not only costly, but also cannot fundamentally solve the problems of corrosion and sticky ash. As a result, there is still a large amount of low-temperature flue gas discharged from the chimney to the atmosphere without being fully utilized, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C1/02C03B20/00
Inventor 孙国方樊磊李玉生
Owner 连云港市盛昌照明电器有限公司
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