Gas purification process
阅读：627发布：2023-04-07
专利汇可以提供Gas purification process专利检索，专利查询，专利分析的服务。并且In a process for removing CO2 and like acid gases from a gaseous mixture by an absorption solution which is regenerated by boiling above atmospheric pressure, the improvement which is removing the boiling solution from the regeneration and injecting it into an expansion zone, whereby a stream of vapor results containing a portion of the CO2 etc. from the absorption solution which, being cooled with a reduced CO2 etc. content is returned to the absorption zone. The stream of vapor is vented.，下面是Gas purification process专利的具体信息内容。
1. In a process of eliminating acid gases selected from the group consisting of CO2, H2S and mixtures thereof from gaseous mixtures containing them, using a regenerable absorbent solution which is circulated between an absorption zone in which the solution is brought into intimate and direct contact with the gaseous mixture in order to purify it and to eliminate said acid gases from it and a regenerating zone in which the solution is brought to the boil by externally supplied heat, with the expulsion of said acid gases previously absorbed, the improvement which comprises: passing the hot and boiling solution extracted from the regenerating zone and containing residual absorbed acid gases to an expansion zone in which mechanical means are used to apply negative pressure; generating from the solution undergoing expansion a stream of vapor; eliminating with the said stream of vapor part of said acid gases still contained in the solution itself and in thus cooling the solution; restoring the thus cooled solution which has a lesser content of said acid gases to the absorption zone; passing the stream of vapor together with said acid gases extracted by mechanical means from the solution to a heating zone; passing to the said heating zone the exhausted solution originating from the absorber and bringing it into intimate and direct contact with the vapor, with resultant heating of the solution and condensation of the vapor; extracting the solution from the heating zone and passing it into the regenerating zone; and discharging the said acid gases into the outside ambient.
2. In a process of eliminating acid gases selected from the group consisting of CO2, H2S and mixtures thereof from gaseous mixtures containing them, using a regenerable absorbent solution which is circulated between an absorption zone in which the solution is brought into intimate and direct contact with the gaseous mixture in order to purify it and eliminate said acid gases from it and a regenerating zone in which the solution is brought to the boil by externally supplied heat with the expulsion of said acid gases previously absorbed, the improvement which comprises: passing the hot and boiling solution extracted from the regenerating zone and containing residual absorbed acid gases to a vaporization zone; passing a current of inert gases into the said vaporization zone; bringing the said current of inert gases into intimate and direct contact with the solution; extracting therefrom a stream of vapor and eliminating part of said acid gases still contained in the solution together with the said stream of vapor and inert gases whereby the solution is cooled; restoring the thus cooled solution which has a lesser content of said acid gases to the absorption zone; extracting from the vaporizatioN zone the stream of vapor and inert gases together with said acid gases eliminated from the solution; passing the said stream of vapor and inert gases together with said acid gases to a heating zone; passing the exhausted solution emerging from the absorber into the said heating zone and bringing into intimate and direct contact with the vapor, with resultant heating of the solution and condensation of the vapor; extracting the solution from the heating zone and passing it to the regenerating zone; and discharging said acid gases into the outside ambient.
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