| 摘要 |
<p>PURPOSE:To conduct a preparatory pressure increasing stage prepared for adsorption and to recover useful components in high purity and in high yield by utilizing a part of the desorbed gas in increasing the pressure of a most rationally selected adsorption tower. CONSTITUTION:A raw gas is supplied to an adsorption tower A under pressure, the pressure is equalized with the pressure of a tower C to increase the pressure of the tower C, and the tower A is slightly reduced in pressure and then further close to the atmospheric pressure. The pressure-reduced gas at this time is boosted by a compressor to further increase the pressure of the tower C as a pressure increasing gas. Meanwhile, the pressure-reduced tower A is further evacuated by a vacuum pump to desorb the adsorbed carbon dioxide, and the adsorbent is regenerated. The regenerated tower A is equalized in pressure with a high-pressure tower B to slightly increase the pressure of the tower A, and the tower B is further reduced in pressure. The pressure-reduced gas flowing out in the pressure reducing stage is boosted by a compressor and supplied, as required, to the tower A along with a part of the product gas to increase the pressure of the tower A close to the atmospheric pressure, and the tower A is on standby for adsorption.</p> |
