Method for measuring recovery rate and recovering sulfur hexafluoride gas

By connecting a mass flow meter and pressure and temperature sensors in series in the recovery pipeline, and combining this with formula calculations, the problems of immediacy and accuracy in detecting sulfur hexafluoride gas recovery rate were solved, enabling real-time monitoring and accumulation of the gas recovery process.

CN116593344BActive Publication Date: 2026-06-23HENAN RELATIONS CO LTD
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Patent Information

Application Number
CN202310448120.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-24
Publication Date
2026-06-23
Estimated Expiration
2043-04-24

AI Technical Summary

Technical Problem

Existing methods for detecting sulfur hexafluoride gas recovery rates are difficult to achieve in real-time and accurate results, especially since the recovery quality of a single operation cannot be accurately measured before the gas is recovered into a cylinder or storage tank.

Method used

A mass flow meter is connected in series in the recovery pipeline, combined with pressure and temperature sensors. The gas mass is calculated using the formula m=ρ(νt)*k(P), and the recovery rate is monitored in real time using the formula sulfur hexafluoride gas recovery rate=1-(P1T0)/(P0T1)*100%, where k is a function of pressure P.

Benefits of technology

It enables real-time metering and accumulation of sulfur hexafluoride gas recovery process, improving the accuracy and immediacy of recovery rate determination, and is suitable for the recovery metering of pure SF6 gas and SF6/N2 mixed gas.

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Abstract

The application relates to a method for measuring the quantity and recovery rate of sulfur hexafluoride gas recovery, which comprises pressure and temperature sensors and a mass flow meter, characterized in that the mass flow meter is connected in series in a recovery pipeline between a gas chamber to be recovered and a recovery device, the pressure and temperature sensors are arranged at a sampling port of the gas chamber to be recovered or in the recovery pipeline in series between the mass flow meter and the gas chamber to be recovered, the mass of the recovered gas is m = rho (nu t) * k (P), wherein m is the mass of the recovered gas, rho is the gas density under standard conditions, nu is the gas flow, i.e. the output flow of the mass flow meter, t is the recovery time, and k is a function of the pressure P, the pressure data being obtained from the pressure sensor; and the recovery rate of the sulfur hexafluoride gas is 1 - (P1T0) / (P0T1) * 100%, wherein P0 and T0 are the initial gas pressure and temperature, and P1 and T1 are the real-time gas pressure and temperature. The application is suitable for the measurement of the quantity and recovery rate of gas recovery of different insulating gas electrical devices.
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