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Process for preparing purified coke oven gas

阅读：423发布：2023-03-30

专利汇可以提供Process for preparing purified coke oven gas专利检索，专利查询，专利分析的服务。并且Purified coke oven gas, substantially free of hydrogen sulfide, is prepared by counter-currently contacting said gas with an absorbent ammonia solution in a multi-stage absorber, dividing the absorbent solution discharged from the absorber and feeding said solution to the top and middle of a stripping tower in a ratio of 0.05 to 1 by weight, where the solution is contacted with steam to remove the acidic gas from the absorbent solution.，下面是Process for preparing purified coke oven gas专利的具体信息内容。

权利要求

1. IN A PROCESS FOR PREPARING A PURIFIED COKE OVEN GAS WHICH COMPRISES CONTACTING COUNTER-CURRENTLY A COKE OVEN GAS WITH AN ABSORBENT, SOLUTION OF AMMONIA IN AN ABSORBER HAVING A PLURALITY OF ABSORBING STAGES, TO ABSORB AN ACIDIC GAS IN THE COKE OVEN GAS INTO THE ABSORBENT SOLUTION. HEATING THE ABSORBENT SOLUTION CONTAINING THE STRIPPING GAS DISCHARGED FROM THE ABSORBER WITH STEAM IN A DEACID TOWER TO SEPARATE SUBSTANTIAL AMOUNTS OF THE ACIDIC GAS FROM THE ABSORBENT SOLUTION AND RECYCLING THE REPRODUCED ABSORBENT SOLUTION TO THE ABSORBER, THE IMPROVEMENT WHEREIN THE ABSORBENT SOLUTION DISCHARGED FROM THE ABSORBER IS DIVIDED AND FED TO THE TOP AND MIDDLE PARTS OF THE STRIPPING TOWER IN A RATIO OF MORE THAN 0.05 BY WEIGHT OF THE ABSORBENT SOLUTION FED TO THE TOP TO 1 BY WEIGHT OF THE ABSORBENT SOLUTION FED TO THE MIDDLE PART, AND THE TEMPERATURE OF THE ABSORBENT SOLUTION FED TO THE TOP IS MAINTAINED AT LOWER THAN 40*C.

2. The process for preparing a purified coke oven gas of claim 1, wherein the contact temperature of the coke oven gas with the ammonia solution is maintained higher than 30*C, and the ammonia concentration in the absorbent solution fed to the absorber is maintained lower than 10 g/l.

3. The process for preparing a purified coke oven gas of claim 1, wherein the acidic gas separated in the stripping tower is washed with condensed water obtained from the stream used for heating the stripping tower, whereby the remaining ammonia gas in the acidic gas is absorbed in the condensed water and the resulting ammonia solution is mixed with the absorbent solution recycled from the stripping tower to the absorber.

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Process for preparing purified coke oven gas

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