JPS55124531A - Denitrification of waste gas from sintering furnace - Google Patents

Denitrification of waste gas from sintering furnace

Info

Publication number
JPS55124531A
JPS55124531A JP3154979A JP3154979A JPS55124531A JP S55124531 A JPS55124531 A JP S55124531A JP 3154979 A JP3154979 A JP 3154979A JP 3154979 A JP3154979 A JP 3154979A JP S55124531 A JPS55124531 A JP S55124531A
Authority
JP
Japan
Prior art keywords
waste gas
reactor
denitrification
catalyst
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3154979A
Other languages
Japanese (ja)
Other versions
JPS6152730B2 (en
Inventor
Takao Yamada
Kuninobu Wakai
Nobuhiro Tsuboi
Yozo Ogino
Senji Niwa
Hayamizu Ito
Yoshitaka Kajihata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Heavy Industries Ltd, Kawasaki Steel Corp filed Critical Kawasaki Heavy Industries Ltd
Priority to JP3154979A priority Critical patent/JPS55124531A/en
Publication of JPS55124531A publication Critical patent/JPS55124531A/en
Publication of JPS6152730B2 publication Critical patent/JPS6152730B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE: To effect an inexpensive denitrification operation and simultaneous reducing of CO concentration in waste gas, by using iron ore catalyst to oxidize CO in waste gas following denitrification operation and by applying part of used iron ore after treatment of activation as denitrification catalyst.
CONSTITUTION: Waste gas 2 generated in sintering furnace 1 is treated with electrostatic precipitator 3 to remove dust, and cleaned with lime water shower or the like in desulfurizer 4. Since this lowers the temperature of the waste gas 2, the temperature is raised to a specified value by exchanger 5, and the gas pressure is raised by blower 6. If the temperature is low, auxiliary furnace 7 is used to further raise the temperature. After addition of NH3, the waste gas is introduced into denitrification reactor 8 to conduct the denitrification to reduce NOx to H2. The waste gas after the denitrication is introduced into CO oxidation reactor 9 filled with iron ore, where CO is oxidized to CO2. The waste gas temperatue is raised when it goes out of the reactor 9, which is used for heating gas in the heat exchanger 5. Part of iron ore used in the reactor 9 is activated and used as catalyst in the reactor 8. Catalyst remaiing in the reactor 9 and one used in the reactor 8 is sent to sintering furnace 1 as raw material for iron manufacture.
COPYRIGHT: (C)1980,JPO&Japio
JP3154979A 1979-03-16 1979-03-16 Denitrification of waste gas from sintering furnace Granted JPS55124531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3154979A JPS55124531A (en) 1979-03-16 1979-03-16 Denitrification of waste gas from sintering furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3154979A JPS55124531A (en) 1979-03-16 1979-03-16 Denitrification of waste gas from sintering furnace

Publications (2)

Publication Number Publication Date
JPS55124531A true JPS55124531A (en) 1980-09-25
JPS6152730B2 JPS6152730B2 (en) 1986-11-14

Family

ID=12334261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3154979A Granted JPS55124531A (en) 1979-03-16 1979-03-16 Denitrification of waste gas from sintering furnace

Country Status (1)

Country Link
JP (1) JPS55124531A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189917A2 (en) * 1985-01-30 1986-08-06 Babcock-Hitachi Kabushiki Kaisha Apparatus for treating flue gas
JPS61502526A (en) * 1984-06-28 1986-11-06 ベルクヴエルクスフエルバント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング SO↓2 and NOx separation method
US5078973A (en) * 1985-01-30 1992-01-07 Babcoco-Hitachi Kabushiki Kaisha Apparatus for treating flue gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61502526A (en) * 1984-06-28 1986-11-06 ベルクヴエルクスフエルバント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング SO↓2 and NOx separation method
EP0189917A2 (en) * 1985-01-30 1986-08-06 Babcock-Hitachi Kabushiki Kaisha Apparatus for treating flue gas
US5078973A (en) * 1985-01-30 1992-01-07 Babcoco-Hitachi Kabushiki Kaisha Apparatus for treating flue gas

Also Published As

Publication number Publication date
JPS6152730B2 (en) 1986-11-14

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