Process and apparatus for eliminating at least one acid gas by means of
a solvent for the purification of natural gas
    3.
    发明授权
    Process and apparatus for eliminating at least one acid gas by means of a solvent for the purification of natural gas 失效
    通过用于净化天然气的溶剂消除至少一种酸性气体的方法和装置

    公开(公告)号:US5735936A

    公开(公告)日:1998-04-07

    申请号:US634703

    申请日:1996-04-18

    IPC分类号: B01D53/14 C10L3/10 B01D53/22

    摘要: The process comprises a cold absorption step 2 for removing acid gas from natural gas using a solvent phase at a pressure P.sub.2 which delivers a purified gas 5; a step for depressurizing and separating resultant acidic solvent phase containing hydrocarbons (lines 4, 11), at a pressure P.sub.12 which is lower than pressure P.sub.2 in a column-heat exchanger 12 which delivers a purified gaseous effluent 13 overhead and a further solvent phase at the bottom (line 17) which is enriched in hydrogen sulphide; and a solvent phase regeneration step carried out in a distillation column 18 at a pressure P.sub.18 and no higher than pressure P.sub.12. A gas 29 containing essentially hydrogen sulphide which is depleted in hydrocarbons is recovered from column 18 and is a suitable feed for a Claus plant for eliminating H.sub.2 S. The regenerated hot solvent phase 20 indirectly exchanges heat with the cold acidic solvent phase from absorber 2 or separator 6. It is then recycled to the absorbent after cooling.

    摘要翻译: 该方法包括一个冷吸收步骤2,用于使用在输送净化气体5的压力P2下的溶剂相从天然气中除去酸性气体; 在塔式热交换器12中以低于压力P2的压力P12压缩和分离所产生的含有烃的酸性溶剂相(管线4,11)的步骤,其将塔顶馏出物和另外的溶剂相输送到 富含硫化氢的底部(管线17) 以及在压力P18且不高于压力P12的蒸馏塔18中进行的溶剂相再生步骤。 从塔18中回收含有基本上含有硫化氢的硫化氢的气体29,并且是用于克劳斯工厂消除H 2 S的合适进料。 再生的热溶剂相20与来自吸收器2或分离器6的冷的酸性溶剂相间接地进行热交换。然后在冷却后再循环至吸收剂。