| 摘要 |
<p>PURPOSE:To perform gas treatment which is stable and easy to control by successively switching plural columns through a multi-way valve which is opened to only one of gas outlet and inlet valves of each column during normal operation and which is not in the fully closed state in the middle of switching operation. CONSTITUTION:Reactors 15-17 packed with an absorbent and of the same structure are operated as an absorption process, a regeneration process and a reduction process by switching multi-way valves 9, 10 and switching reducing gas passage switching valves 23-28 and regenerating gas passage switching valves 11-13, 18-20 accompanying the former. When gas flow is switched from the 1st column 15 to the 2nd column 16, gas flow 7 is in the partially open state to both a gas discharge pipe 1 and a gas discharge pipe 2. A valve plug 4 of the multi-way valve is further turned and then is transferred to the closed state to the gas discharge pipe 1 and to the full open state to the gas discharge pipe 2 to complete switching operation. Further, during this time, it is normally closed to a gas discharge pipe 3.</p> |
