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Method for STC vaporization and hydrogen mixing

A hydrogen and vaporization tank technology, applied in chemical instruments and methods, silicon compounds, halogenated silicon compounds, etc., can solve problems such as difficult maintenance, complicated equipment, and difficult to remove, and achieve extended service life, reduced production costs, and reduced energy. consumption effect

Inactive Publication Date: 2020-03-27
南京合创工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long process and complex equipment (including natural gas combustion furnace, heat transfer oil circulation pump, heat transfer oil expansion tank, heat transfer oil storage tank, heat transfer oil light component condenser, etc.), complicated operation and difficult maintenance, and heat transfer oil has great environmental pollution , if the heat transfer oil leaks into the system, it will cause great pollution to the entire cold hydrogenation system, and it is difficult to remove
At the same time, the construction cost and maintenance cost are relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for STC vaporization and hydrogen mixing, characterized in that the method for STC vaporization and hydrogen mixing comprises the following steps:

[0024] (1) Place the liquid-phase STC in the first container, and after pressurization, use an electric heating element to directly heat the material, keep it warm for a period of time, and then flow the liquid into the second container;

[0025] (2) after the liquid phase STC after the above-mentioned heat preservation flows into the second container, then feed hydrogen into the liquid phase STC for bubbling;

[0026] (3) The material in the above-mentioned second container is heated by an external heat source and an internal heat source simultaneously, and the liquid-phase STC is vaporized;

[0027] (4) Mix the vaporized STC with the hydrogen gas in the second container, and then pass it into the vaporization tank, and at the same time supplement the preheated hydrogen gas, and mix evenly in the vaporization tank...

Embodiment 2

[0030] A method for STC vaporization and hydrogen mixing, characterized in that the method for STC vaporization and hydrogen mixing comprises the following steps:

[0031] (1) Place the liquid-phase STC in the first container, and after pressurization, use an electric heating element to directly heat the material, keep it warm for a period of time, and then flow the liquid into the second container;

[0032] (2) after the liquid phase STC after the above-mentioned heat preservation flows into the second container, then feed hydrogen into the liquid phase STC for bubbling;

[0033] (3) The material in the above-mentioned second container is heated by an external heat source and an internal heat source simultaneously, and the liquid-phase STC is vaporized;

[0034] (4) Mix the vaporized STC with the hydrogen gas in the second container, and then pass it into the vaporization tank, and at the same time supplement the preheated hydrogen gas, and mix evenly in the vaporization tank...

Embodiment 3

[0037] A method for STC vaporization and hydrogen mixing, characterized in that the method for STC vaporization and hydrogen mixing comprises the following steps:

[0038] (1) Place the liquid-phase STC in the first container, and after pressurization, use an electric heating element to directly heat the material, keep it warm for a period of time, and then flow the liquid into the second container;

[0039] (2) after the liquid phase STC after the above-mentioned heat preservation flows into the second container, then feed hydrogen into the liquid phase STC for bubbling;

[0040] (3) The material in the above-mentioned second container is heated by an external heat source and an internal heat source simultaneously, and the liquid-phase STC is vaporized;

[0041] (4) Mix the vaporized STC with the hydrogen gas in the second container, and then pass it into the vaporization tank, and at the same time supplement the preheated hydrogen gas, and mix evenly in the vaporization tank...

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PUM

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Abstract

The invention provides a method for STC vaporization and hydrogen mixing, and relates to the technical field of cold hydrogenation processing. The method comprises: liquid-phase STC preheating pressurizing, STC heat preservation hydrogen bubbling, STC heating vaporization, preheated hydrogen mixing and other steps. According to the invention, the method overcomes the defects in the prior art, effectively reduces the industrial vaporization temperature of STC, enables STC to be more fully mixed and reacted with hydrogen after vaporization so as to achieves the energy-saving effect, and is simple to operate, lower in cost and suitable for large-scale production and use in factories.

Description

technical field [0001] The invention relates to the technical field of cold hydrogenation processing, in particular to a method for STC vaporization and hydrogen mixing. Background technique [0002] The cold hydrogenation device is a process in which hydrogen and STC (silicon tetrachloride) are mixed and then reacted with silicon powder to produce TCS (trichlorosilane). The reaction is completed at >500°C and >2MPa, which requires the vaporization feed pressure of STC and hydrogen to be >2MPa. The unit must be equipped with vaporization systems for STC and hydrogen. Silicon tetrachloride vaporization is an important part of the material heating unit in the cold hydrogenation device. Choosing a reasonable silicon tetrachloride vaporization method can not only effectively reduce energy consumption and prolong the service life of the equipment, but also has great significance for the continuous operation of the device. [0003] An efficient and stable vaporization m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/107
CPCC01B33/1071Y02P20/10
Inventor 迟志奎王长乐
Owner 南京合创工程设计有限公司
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