Title:
METHOD FOR SEPARATING AND COLLECTING CARBON DIOXIDE FROM BLAST FURNACE GAS IN BLAST FURNACE GAS UTILIZATION PROCESS
Document Type and Number:
WIPO Patent Application WO/2011/039810
Kind Code:
A1
Abstract:
Disclosed is a method for separating and collecting carbon dioxide from a blast furnace gas in a blast furnace gas utilization process. The method comprises: introducing a blast furnace gas removed from a blast furnace into an absorption column; allowing carbon dioxide contained in the blast furnace gas to be absorbed in an absorption liquid in the absorption column; introducing a portion of the blast furnace gas from which carbon dioxide has been removed into an expansion turbine; reducing the pressure in the expansion turbine; storing the portion of the blast furnace gas in a gas holder and utilizing the stored gas as a heating fuel for an iron-making process; introducing another portion of the blast furnace gas from which carbon dioxide has been removed into a blast gas compressor that can be driven by the expansion turbine; increasing the pressure in the blast gas compressor; introducing the another portion of the blast furnace gas into a gas turbine generator, burning the another portion of the blast furnace gas under a high pressure and utilizing the burned gas as a fuel for the generation of an electrical power; introducing the absorption liquid which has absorbed carbon dioxide in the absorption column into a regeneration column; heating the absorption liquid introduced into the regeneration column by means of heat of a discharged gas from the gas turbine generator to remove carbon dioxide from the absorption liquid; and circulating the absorption liquid from which carbon dioxide has been removed from the regeneration column to the absorption column.
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Inventors:
TOMISAKI, Shin (46-59, Oaza Nakabaru, Tobata-ku, Kitakyushu-sh, Fukuoka 05, 〒8048505, JP)
Application Number:
JP2009/005047
Publication Date:
April 07, 2011
Filing Date:
September 30, 2009
Export Citation:
Assignee:
NIPPON STEEL ENGINEERING CO., LTD. (5-1 Osaki 1-chome, Shinagawa-ku Tokyo, 04, 〒1418604, JP)
新日鉄エンジニアリング株式会社 (〒04 東京都品川区大崎一丁目５番１号 Tokyo, 〒1418604, JP)
新日鉄エンジニアリング株式会社 (〒04 東京都品川区大崎一丁目５番１号 Tokyo, 〒1418604, JP)
International Classes:
C21B7/00; B01D53/14; C01B31/20; F27D17/00
Attorney, Agent or Firm:
SHIGA, Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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