Title:
METHOD FOR PURIFYING COKE OVEN GAS AND APPARATUS FOR PURIFYING COKE OVEN GAS
Document Type and Number:
WIPO Patent Application WO/2018/048032
Kind Code:
A1
Abstract:
A method for purifying coke oven gas, according to an embodiment of the present invention, comprises the steps of: absorbing, in an absorption column, hydrogen sulfide and ammonia contained in coke oven gas by using an aqueous solution of methyldiethanolamine which is an absorption solution, and discharging the absorption solution which has absorbed the hydrogen sulfide and the ammonia; separating, in a regeneration column, the hydrogen sulfide and the ammonia contained in the absorption solution which has absorbed the hydrogen sulfide and the ammonia, into a vapor phase and discharging the regenerated absorption solution; transferring the regenerated absorption solution to the absorption column; and removing heat stable salts (HSS) contained in the regenerated absorption solution transferred to the absorption column by means of an electrodialysis device. Due to this feature, the present invention has the effects of improving the absorption efficiency of hydrogen sulfide and ammonia contained in the coke oven gas and preventing performance deterioration of an absorbent by treating the heat stable salts.
Inventors:
LEE MAN-SU (KR)
AHN CHI-KYU (KR)
KIM DONG-HYUK (KR)
AHN CHI-KYU (KR)
KIM DONG-HYUK (KR)
Application Number:
PCT/KR2016/015135
Publication Date:
March 15, 2018
Filing Date:
December 22, 2016
Export Citation:
Assignee:
POSCO (KR)
RES INST IND SCIENCE & TECH (KR)
RES INST IND SCIENCE & TECH (KR)
International Classes:
C10B27/00; C10K1/00; C10K1/10
Foreign References:
| KR20130027191A | 2013-03-15 | |||
| KR20140141776A | 2014-12-11 | |||
| JP2015139748A | 2015-08-03 | |||
| JP2014512944A | 2014-05-29 | |||
| JP2001145819A | 2001-05-29 |
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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