| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for removing acid materials with limited energy consumption in the a purifying process. <P>SOLUTION: A gas to be treated 21 including carbon dioxide and hydrogen sulfide is led to the first absorbing column 1, and carbon dioxide and hydrogen sulfide are removed by contacting with an absorbing liquid in it. Then, the gas to be treated 21 is led into the second absorbing column 2, and the remaining carbon dioxide and hydrogen sulfide are removed by contacting with the absorbing liquid in it. The absorbing liquid 25 which has absorbed carbon dioxide and hydrogen sulfide in the first and the second absorbing columns 1 and 2 is led to a flash tank 4 where an internal pressure is kept lower than that in these absorbing columns 1 and 2, a part of carbon dioxide and hydrogen sulfide is released, a part is cooled and led to the second absorbing column 2, and the remaining part is led to a regenerating column 5 to be heated to release the remaining carbon dioxide and hydrogen sulfide. The part of the absorbing liquid led to the regenerating column 5 is cooled and led to the first absorbing column 1, the rest is cooled and led to the second absorbing column 2 from the position near to the column top part, and it is contacted with the gas to be treated in the second absorbing column 2 again. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
