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Method and system for controlling liquid level of vapor-liquid separator in polycrystalline silicon cold hydrogenation production

A vapor-liquid separator, cold hydrogenation technology, applied in the control/regulation system, liquid level control, non-electric variable control and other directions, can solve problems such as the difficulty of liquid discharge of the vapor-liquid separator, achieve the degree of automation of sustainable operation, solve the The effect of difficult drainage

Pending Publication Date: 2020-02-28
新疆东方希望新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method and system for controlling the liquid level of the vapor-liquid separator in polysilicon cold hydrogenation production, so as to solve the problem of difficult drainage of the vapor-liquid separator and realize stable production operation

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  • Method and system for controlling liquid level of vapor-liquid separator in polycrystalline silicon cold hydrogenation production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the method for controlling the liquid level of the vapor-liquid separator 5 in the cold hydrogenation production of polysilicon includes:

[0030] Retrofit of vapor-liquid separator 5: installing a thermometer on vapor-liquid separator 5 ( figure 1 Among them is the first thermometer 6) and a liquid level gauge, and the thermometer is used to measure the temperature of the silane liquid in the vapor-liquid separator 5, and the liquid level gauge is used to detect the liquid level of the silane liquid in the vapor-liquid separator 5; The outlet of 5 is provided with a regulating valve ( figure 1 Among them is the third ball valve 7), the regulating valve is used to regulate the liquid level of silane liquid (trichlorosilane and / or silicon tetrachloride) in the vapor-liquid separator 5, and the silane liquid level in the vapor-liquid separator 5 Control within the target range;

[0031] Set up liquid storage: Liquid storage includes condensat...

Embodiment 2

[0036] This embodiment is similar to the first embodiment, the difference is that many technical features have been improved in this embodiment, so that the overall solution is more complete and the effect is more prominent.

[0037] The number of condensate intermediate tanks and TCS buffer tanks is at least one, and a liquid outlet main pipe is drawn from the vapor-liquid separator 5. The liquid outlet main pipe is connected to several branch pipes, and each branch pipe is connected to the condensate intermediate tank or TCS buffer tank.

[0038] A regulating valve is arranged on the liquid outlet main pipe, and the regulating valve is a ball valve.

[0039] A regulating valve is arranged on each branch pipe, and the regulating valve is a ball valve. A controlled regulating valve 8 is also arranged on the branch pipe connected to the TCS buffer tank. The controlled regulating valve 8 is electrically connected with the remote liquid level gauge 1, and the opening and closing ...

Embodiment 3

[0046] Such as figure 1 As shown, a system for controlling the liquid level of the vapor-liquid separator 5 in polysilicon cold hydrogenation production, the system includes:

[0047] Part 5 of vapor-liquid separator: install a thermometer on vapor-liquid separator 5 ( figure 1 Among them is the first thermometer 6) and a liquid level gauge, and the thermometer is used to measure the temperature of the silane liquid in the vapor-liquid separator 5, and the liquid level gauge is used to detect the liquid level of the silane liquid in the vapor-liquid separator 5; The outlet of 5 is provided with a regulating valve ( figure 1 Among them is the third ball valve 7), the regulating valve is used to regulate the liquid level of the silane liquid in the vapor-liquid separator 5, and the liquid level of the silane liquid in the vapor-liquid separator 5 is controlled within the index range;

[0048] Liquid storage equipment part: The liquid storage equipment includes a condensate int...

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Abstract

The invention discloses a method and system for controlling the liquid level of a vapor-liquid separator in polycrystalline silicon cold hydrogenation production, and the method comprises the steps: reconstructing the vapor-liquid separator: installing a thermometer and a liquid level meter on the vapor-liquid separator, wherein the thermometer is used for measuring the temperature of silane liquid in the vapor-liquid separator, and the liquid level meter is used for detecting the liquid level of the silane liquid in the vapor-liquid separator; arranging an adjusting valve at an outlet of thevapor-liquid separator; arranging a liquid storage device which comprises a condensate intermediate tank and a TCS buffer tank and is used for providing silane liquid for the subsequent process equipment; enabling the liquid storage device to be connected with the vapor-liquid separator, wherein the liquid storage device is used for receiving silane liquid flowing out of the vapor-liquid separator, an adjusting valve is installed on a pipeline, connected with the vapor-liquid separator, of the liquid storage device, and the flow of the silane liquid entering the liquid storage device is controlled through the adjusting valve. Through a large number of scheme designs, a set of reasonable liquid discharging treatment scheme is finally designed, the scheme can continuously operate and is highin automation degree, and the problem that liquid discharging of the vapor-liquid separator is difficult is solved.

Description

technical field [0001] The invention belongs to the field of polysilicon cold hydrogenation production technology, and in particular relates to a method and system for controlling the liquid level of a gas-liquid separator in polysilicon cold hydrogenation production. Background technique [0002] At present, the Hualu polysilicon-cold hydrogenation process system is widely used in China, and the process production is carried out through the existing Hualu process package. During the actual operation of the cold hydrogenation unit, it is difficult to drain the gas-liquid separator. With the increase of the feed volume of the system, the difficulty of draining the gas-liquid separator increases sharply, which affects the production operation. [0003] In the Hualu polysilicon-cold hydrogenation process package, the gas-liquid separator drainage was originally designed to be directly discharged to the liquid storage tank through pipelines. This design had operational defects, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12
CPCG05D9/12
Inventor 焦强强赵小飞贾占位尤吉升
Owner 新疆东方希望新能源有限公司
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