| 摘要 |
<p>PURPOSE:To enhance recovery percentage for the specified gas by separating a gaseous specified component from a gaseous mixture by means of an adsorbing process, a gas washing process and a desorbing process and providing a pressure equalizing process respectively after the finish of each process of adsorption and desorption. CONSTITUTION:Gaseous raw material 16 is sent to an absorption tower A via a valve 1 and raisen in pressure till adsorption pressure and exhaust gas 20 finished in adsorption is discharged via a valve 2 and a check valve 19. After finishing an adsorbing process, it is shifted to a pressure equalizing process and one part of adsorbing gas is sent to an absorption tower B via the valves 2, 4. Thereafter it is shifted to a washing process and desorbed gas of an absorption tower C being in a desorbing process is sent to the absorption tower A via a vacuum pump 17 and a valve 7 and washed exhaust gas is returned to a feed line of the raw material. Then the absorption tower A is decompressed by the vacuum pump 17 to perform the desorbing process and a gaseous product 21 is recovered and after finishing the desorbing process, the pressure equalizing process is performed between the absorption tower A and absorption tower C to raise the pressure.</p> |
