Device and method for determination of trace moisture content of sulfur hexafluoride gas

A technology of sulfur hexafluoride gas and trace moisture, applied in the direction of electrochemical variables of materials, etc., can solve the problems of hindering the wide application of detection methods, inconvenient on-site testing, and large detection results, and achieves the goal of being suitable for popularization and use, simple in structure, and low in consumption. short time effect

Inactive Publication Date: 2016-11-02
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +2
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The dew point method is affected by the condensation of water vapor due to the attachment of particulate matter or some organic matter on the mirror surface, making the test result too large; the resistance-capacitance method needs to be checked regularly; Dry gas purging to ensure the dryness of the entire system, long detection time, inconvenient on-site testing and high price hinder the wide application of this detection method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for determination of trace moisture content of sulfur hexafluoride gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for measuring trace moisture content of sulfur hexafluoride gas, including the following steps:

[0039] A. Inhale a certain amount of sulfur hexafluoride gas at a constant speed;

[0040] B. Inhaled sulfur hexafluoride gas electrolyzed in the electrolysis cell of the Coulomb meter;

[0041] C. Collect relevant data, and measure the moisture content in sulfur hexafluoride gas according to Karl Fischer coulometric method.

Embodiment 2

[0043] This embodiment is refined on the basis of the above embodiment, that is, in step C, the specific method for calculating the moisture content in the sulfur hexafluoride gas is:

[0044] The relationship between the moisture in the gas and the amount of electrolysis is: = ;

[0045] which is: ;

[0046] Then the moisture content in the gas is: ;

[0047] Among them, W is the moisture in the gas, the unit is μg;

[0048] Q is the electrolysis power, the unit is mC;

[0049] C is the moisture content in the gas, the unit is μl / L;

[0050] V is the volume of the measured gas under standard atmospheric pressure, in L.

[0051] According to the relational expression of the moisture content in the gas, it can be known that the moisture content in the gas can be obtained only by collecting the electrolysis power data.

[0052] In step A, the amount of sulfur hexafluoride gas inhaled is 0.5L, and its instantaneous flow rate is controlled to be 400SCCM.

[0053] The electrolysis rate in the...

Embodiment 3

[0057] Such as figure 1 A device for measuring the trace moisture content of sulfur hexafluoride gas is shown, including a sampling system, a detection system and a data processing system connected in sequence;

[0058] The sampling system includes a flow control device for controlling the flow of the incoming sulfur hexafluoride gas;

[0059] The detection system includes a coulomb meter electrolysis cell, an electrolysis circuit connected in the coulomb meter electrolysis cell, and a measurement circuit for measuring electrolysis parameters;

[0060] The data processing system includes a storage device, a display device, and a data processing control circuit that uses the electrolysis parameters of the measurement circuit to obtain the moisture content in the sulfur hexafluoride gas according to the Karl Fischer coulometric method.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a device and a method for the determination of trace moisture content of sulfur hexafluoride gas. The method comprises the following steps: A, inhaling a certain amount of sulfur hexafluoride gas at a constant speed; B, electrolyzing the inhaled sulfur hexafluoride gas in a coulombmeter electrolytic tank; C, collecting relevant data, and determining the moisture content in the sulfur hexafluoride gas according to the Karl-Fischer coulometry method. The method is easy for measurement, consumes less time and has accurate results; and the device has simple structure and low cost, and is applicable to popularization and use.

Description

Technical field [0001] The invention relates to a device and method for measuring trace moisture content of sulfur hexafluoride gas. Background technique [0002] The amount of micro-water content in sulfur hexafluoride gas is an important indicator for monitoring the safe operation of equipment. The State Grid Corporation clearly stipulates the water content of sulfur hexafluoride insulation equipment in the equipment installation regulations and equipment state maintenance test procedures. [0003] The main methods currently used to detect the moisture content of sulfur hexafluoride gas are dew point method, resistance-capacitance method, and phosphorus pentoxide electrolysis method. [0004] In the dew point method, particulate matter or some organic matter adheres to the mirror surface to affect the condensation of water vapor, which makes the detection result too large; the resistance-capacitance method requires regular verification; the phosphorus pentoxide electrolysis method ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/28
CPCG01N27/28
Inventor 王杰苏长华董晓峰张力周易谦兰新生田倩倩耿植
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap