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Device for detecting moisture content in gaseous substances

A detection device and technology for gaseous substances, which are applied in measurement devices, analytical materials, electrochemical variables of materials, etc., can solve the problems of inaccurate detection of moisture content detection devices, etc., so as to prolong the gas-liquid contact time, increase sufficient contact, and fully react. Effect

Pending Publication Date: 2020-10-30
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a detection device for moisture content in gaseous substances, to solve the problem that the detection device for moisture content in gas based on the Karl Fischer Coulomb method is not accurate enough

Method used

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  • Device for detecting moisture content in gaseous substances
  • Device for detecting moisture content in gaseous substances
  • Device for detecting moisture content in gaseous substances

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Embodiment Construction

[0021] In the prior art of Karl Fischer coulometric method for measuring water content in gas, the sample injection is unidirectional, and the electrolytic cell is provided with a stirring device, which will produce a vortex flow direction when stirring, and the liquid pressure in the center of the vortex is relatively small at this time. The sampling gas will move to the center and the upper part of the liquid surface along the direction of rotation. Even if the sampling device is set as a sampling needle with a porous lower end, it only increases the gas-liquid contact area, and since the sampling direction is the same, these bubbles will Because the surface tension is adsorbed together, it is difficult to achieve a good effect. In this way, there will still be moisture in the sample gas leaving the electrolyte surface directly with the gas, which will affect the detection accuracy; therefore, in order to improve the accuracy of the detection results , the applicant has trans...

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Abstract

The invention discloses a device for detecting the moisture content in gaseous substances, relates to the technical field of maintenance and detection auxiliary equipment of power equipment, and aimsto solve the problem that a device for detecting the moisture content in gas based on Karl Fischer coulometry is not accurate enough. The device comprises a sample injection device, a detection deviceand a data control and calculation system which are connected in sequence. The sample injection device comprises a gas inlet, a pressure reducing valve, a gas flow controller and a gas-liquid contactdevice which are sequentially connected through pipelines. The gas-liquid contact device comprises a gas inlet pipeline and a gas outlet which is formed in the tail end of the gas inlet pipeline andarranged in an electrolytic tank, the lower end of the gas outlet is closed, and a plurality of micro holes are formed around the gas outlet. According to the invention, the accuracy of detecting themoisture content in gas by Karl Fischer coulometry can be improved.

Description

technical field [0001] The invention relates to the technical field of electric equipment maintenance and detection auxiliary equipment, in particular to a detection device for moisture content in gaseous substances. Background technique [0002] Pure sulfur hexafluoride gas is a chemically stable, non-flammable gas. In terms of electrical properties, it has many advantages such as good insulation performance, no fire hazard, and good arc extinguishing performance. Circuit breakers and GIS equipment using sulfur hexafluoride gas as the arc extinguishing medium have been widely used. However, if the water content of the sulfur hexafluoride gas in the gas chamber is too much, it will cause harm to the operation and maintenance of the equipment. Therefore, the water content of the sulfur hexafluoride gas must be strictly controlled. Common measurement methods for sulfur hexafluoride gas include gravimetric method, electrolysis method and dew point method; in addition, there i...

Claims

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Application Information

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IPC IPC(8): G01N27/416G01N27/42
CPCG01N27/4162G01N27/423
Inventor 洪文生赵成久韩玉停赵寅齐斌汪隆臻王树斌鲁胜清
Owner STATE GRID CORP OF CHINA
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