| 摘要 |
<p>PURPOSE:To improve recovery factors of non-adsorbable product gases, by successibly conducting such processes as adsorption, balanced pressure reduction, parallel-flow pressure reduction, counter-flow pressure reduction, scavenging, balanced pressurization, product pressurization, raw gas pressurization through four adsorption towers or more. CONSTITUTION:Raw gases are fed to an adsorption tower A, where easily adsorbable components thereof are adsorbed, while the product gases flow out to be recovered, following which the tower A is connected to an adsorption tower B which has been scavenged so that a balanced pressure reduction is conducted in the tower A, which is followed by a parallel pressure reduction to send said pressure-reduced gases to an adsorption tower C as scavenging gases. And then in the tower A, easily adsorbable components are adsorbed and removed by counter-current pressure reduction, thereafter said tower A is scavenged by the pressure-reduced gases by parallel flow from an adsorption tower D. Then, the tower A is pressurized to the adsorption pressure by successively conducting balanced pressurization, product pressurization, raw gas pressurization in association with the adsorption tower B. In this manner, each of the processes stated above is conducted successively in the adsorption towers A-D to improve recovery factors of product gases.</p> |
