초록 ▼

A process is disclosed for the recovery and reuse of the heat contained in the gas/vapor overhead mixture from a stripping column in which a noncondensable gas is stripped from a liquid solution by contacting the solution with a hot vapor such as steam. The steam or other vapor in the overhead mixtu

A process is disclosed for the recovery and reuse of the heat contained in the gas/vapor overhead mixture from a stripping column in which a noncondensable gas is stripped from a liquid solution by contacting the solution with a hot vapor such as steam. The steam or other vapor in the overhead mixture is separated from the non-condensable gas or gases by preferentially passing the vapor through a semipermeable membrane. The water or other condensable vapor is then compressed and either reinjected at the bottom of the stripping column or condensed in the column reboiler, thus permitting its reuse in the stripping process. If the compressed vapor is reinjected into the stripping column, it serves as the stripping medium itself. If the compessed vapor is condensed in the column reboiler, its latent heat of vaporization is thereby recovered and used to generate the required stripping vapor by boiling the solution being stripped.

대표청구항 ▼

In a process for stripping noncondensable or high-vapor-pressure gases from a liquid by contacting said liquid with a stripping vapor and thereby producing an overhead mixture of gas and stripping vapor, the improvement comprising: (a) separating said stripping vapor in said overhead mixture by pass

In a process for stripping noncondensable or high-vapor-pressure gases from a liquid by contacting said liquid with a stripping vapor and thereby producing an overhead mixture of gas and stripping vapor, the improvement comprising: (a) separating said stripping vapor in said overhead mixture by passing it through a membrane that is substantially permeable to said separated stripping vapor and substantially impermeable to said gas; (b) compressing and condensing said separated stripping vapor; and (c) recovering said separated, condensed stripping vapor and the sensible and latent heat thereof.