| 摘要 |
1,261,750. Recovering condensibles. BLACK SIVALLS & BRYSON Inc. 5 Nov., 1969 [5 Nov., 1968], No. 54345/69. Heading B1L. In a continuous cyclic process for recovering condensibles e.g. methane from a gas stream a regenerated adsorbent bed has its undesorbed condensibles swept out by the main gas stream and re-adsorbed in another bed. During the first phase of a three phase cycle the main feed gas is fed from line 10 and liquid separator 13 (via heavy type line flow path) to adsorbent bed 16 wherein condensibles are adsorbed. Stripped main gas passes to bed 18 which becomes relatively cool. The gas emerging passes via lines 42, 72, heat exchanger 74, and lines 76 to exit 80. Regeneration gas cycles through line 84 heat exchangers 74, 88, heater 94, line 98 and bed 20 to desorb the condensibles. The emerging gas stream passes via lines 116, 124, 126 to atmospheric cooler 128 and condensible separator 136. The regeneration gas is recycled via line 140. In the initial stages of the next phase the main feed gas passes through previously desorbed hot bed 20 and sweeps out any undesorbed condensibles. The gas then passes via lines 44, 70, 72, 76 and 46 onto the now cooled bed 18 to adsorb the condensibles. The emergent gas passes out via the line 80. In the latter stages of the phase the feed of the main gas stream is switched from bed 20 to bed 18 so that condensible adsorption takes place. The stripped gas passes to bed 20 to cool it and thence exits at line 80. The regeneration gas still passes through the bed 16. In the last cycle-completing phase the beds are switched so that the previously cooled bed is adsorbing the previously heated bed has it undesorbed condensibles swept out and the previously adsorbing bed is regenerated. Valves 148, 146 are used for volume control. |
