Separating method for alternative gas mixtures for use as insulating media
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Solution Overview
Problem
There is a need for reliable methods to separate gas mixtures consisting of a usage gas and secondary gases back into their individual components, particularly in industrial applications such as electric switching installations, to remove contaminants and produce fresh gas mixtures with different mixing ratios, while ensuring high purity and efficient recovery of usage gases.
Innovation Solution
A method involving compression, cooling, and subsequent heating of the gas mixture in pressure and purification vessels, where the pressure and temperature conditions are set to liquefy the usage gas while keeping secondary gases in the gaseous phase, allowing for their separation and purification, with the use of compressors, cooling units, and heating appliances to achieve effective separation and recovery of usage gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gas mixture is compressed and cooled to liquefy the usage gas, then the separation efficiency and usage gas recovery are improved, but the energy consumption and system complexity increase
Solution Approach 1:
The invention utilizes phase transitions of the usage gas by compressing and cooling the gas mixture to liquefy the usage gas while keeping secondary gases in the gaseous phase. The pressure is set to be at least twice the vapor pressure of the usage gas and at least 5% lower than the vapor pressure of secondary gases, enabling selective liquefaction and separation based on vapor pressure differences.
2Manufacturing precision
If the pressure in the pressure vessel is set high to ensure complete liquefaction of usage gas, then the separation purity is improved, but the risk of secondary gas condensation and equipment requirements increase
Solution Approach 1:
The invention carefully controls pressure parameters to achieve selective liquefaction. The pressure is set to be at least twice the vapor pressure of the usage gas but at least 5% lower than the vapor pressure of secondary gases. This precise parameter control ensures complete liquefaction of usage gas while preventing secondary gas condensation.
3Manufacturing precision
If additional purification steps are added to increase usage gas purity, then the recovery quality is improved, but the process complexity and time consumption increase
Solution Approach 1:
The invention extracts secondary gases from the gas mixture by selective liquefaction of the usage gas. The separated gas phase containing secondary gases is removed from the pressure vessel, and the liquefied usage gas is transferred to a purification vessel for further purification by drawing off any remaining gas phase, achieving over 99% purity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the reliable separation and recovery of usage gases with high purity, achieving over 99% purity by exploiting the differences in vapor pressures between usage and secondary gases, effectively addressing the need for efficient gas mixture separation and recycling in industrial applications.
Implementation Method 1
cooling of the compressed gas mixture in the pressure vessel until the usage gas goes over into the liquid phase
Implementation Method 2
the pressure in the pressure vessel being set so that it is at least twice as high as the vapor pressure of the usage gas at the prevailing temperature in the pressure vessel
Implementation Method 3
compression of the gas mixture in a compressor
Implementation Method 4
heating of the liquefied usage gas in the purification vessel
Data Source
AI summary
A method is disclosed for recovering a useful gas from a gas mixture including a useful gas and at least one secondary gas. The gas mixture is first compressed and transferred into a pressure vessel where cooling occurs. Then, from the pressure vessel, a secondary-gas containing gas phase is removed and condensed useful gas is transferred into a purification vessel. In the purification vessel, the condensed useful gas is then purified. A plant is disclosed for recovering a useful gas from a gas mixture. Finally, the use of a plant for carrying out a method for recovering a useful gas from a gas mixture is disclosed.