JPS577230A - Method and apparatus for denitrating waste gas of kiln - Google Patents

Method and apparatus for denitrating waste gas of kiln

Info

Publication number
JPS577230A
JPS577230A JP7989880A JP7989880A JPS577230A JP S577230 A JPS577230 A JP S577230A JP 7989880 A JP7989880 A JP 7989880A JP 7989880 A JP7989880 A JP 7989880A JP S577230 A JPS577230 A JP S577230A
Authority
JP
Japan
Prior art keywords
gas
nox
reducing
air
damper
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.)
Pending
Application number
JP7989880A
Other languages
Japanese (ja)
Inventor
Takashi Ono
Shizuo Tsuchida
Yoshimasa Hayashi
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.)
Nihon Cement Co Ltd
Original Assignee
Nihon Cement Co Ltd
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 Nihon Cement Co Ltd filed Critical Nihon Cement Co Ltd
Priority to JP7989880A priority Critical patent/JPS577230A/en
Publication of JPS577230A publication Critical patent/JPS577230A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable to obtain good denitrating effect even if coal easily generating NOx is used as a fuel by a method wherein a reducing zone, a main combustion zone and a recombustion zone are provided and an air ratio in respective zones is controlled to a predetermined ratio to generate a NOx reducing gas and, thereby, the generation of NOx is controlled.
CONSTITUTION: A waste gas from a rotary kiln 11 is introduced into a reducing chamber 50 from a throttle part 23. Fine coal is supplied from a reducing burner 21 and hot air is supplied from a damper 28 so as to adjust an air ratio to 0.8W1.0 to generate CO gas and CO and NOx are subjected to contact reduction by using a cement stock material as a catalyst. Subsequently, the gas is raised into a main combustion chamber 60 and fine coal is supplied from a main burner 22 and hot air from a damper 29 so as to adjust an air ratio to 0.95W1.10 to combust almost all of a fuel while the generation of NOx is controlled. Next, recombusting air with an air ratio of 1.10W1.20 is introduced from a damper 30 to mix and combust the uncombusted gas at a throttle part 25. Further, the gas is reversed in a recombusting chamber to completely combust the same and, thereafter, the waste gas is sent to a cyclone of a cement baking system from a duct 18.
COPYRIGHT: (C)1982,JPO&Japio
JP7989880A 1980-06-13 1980-06-13 Method and apparatus for denitrating waste gas of kiln Pending JPS577230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7989880A JPS577230A (en) 1980-06-13 1980-06-13 Method and apparatus for denitrating waste gas of kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7989880A JPS577230A (en) 1980-06-13 1980-06-13 Method and apparatus for denitrating waste gas of kiln

Publications (1)

Publication Number Publication Date
JPS577230A true JPS577230A (en) 1982-01-14

Family

ID=13703091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7989880A Pending JPS577230A (en) 1980-06-13 1980-06-13 Method and apparatus for denitrating waste gas of kiln

Country Status (1)

Country Link
JP (1) JPS577230A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996284A (en) * 1982-11-22 1984-06-02 Aoki Enterp:Kk Treatment of metallic surface generating no waste water
JPH04365885A (en) * 1991-01-17 1992-12-17 Nippon Paint Plant Eng Kk Surface treating device
EP1155731A1 (en) * 2000-05-19 2001-11-21 Praxair Technology, Inc. NOx reduction using coal based reburning
WO2005108892A1 (en) * 2004-05-10 2005-11-17 Flsmidth A/S Method and apparatus for incineration of combustible waste
CN109569239A (en) * 2018-12-06 2019-04-05 山东中旭节能环保科技有限公司 A kind of method of new dry process rotary kiln denitrification
CN112546833A (en) * 2020-02-29 2021-03-26 天瑞集团光山水泥有限公司 Ammonia-free denitration method and device for tail gas in cement kiln production

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5259068A (en) * 1975-11-12 1977-05-16 Chichibu Cement Co Ltd Dry desulfurization and denitration method and its apparatus
JPS5345725A (en) * 1976-10-08 1978-04-24 Mitsubishi Heavy Ind Ltd Combustion method for reducing nitrogen oxide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5259068A (en) * 1975-11-12 1977-05-16 Chichibu Cement Co Ltd Dry desulfurization and denitration method and its apparatus
JPS5345725A (en) * 1976-10-08 1978-04-24 Mitsubishi Heavy Ind Ltd Combustion method for reducing nitrogen oxide

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996284A (en) * 1982-11-22 1984-06-02 Aoki Enterp:Kk Treatment of metallic surface generating no waste water
JPH04365885A (en) * 1991-01-17 1992-12-17 Nippon Paint Plant Eng Kk Surface treating device
EP1155731A1 (en) * 2000-05-19 2001-11-21 Praxair Technology, Inc. NOx reduction using coal based reburning
WO2005108892A1 (en) * 2004-05-10 2005-11-17 Flsmidth A/S Method and apparatus for incineration of combustible waste
JP2008506615A (en) * 2004-05-10 2008-03-06 エフエルスミス エー／エス Incineration method and equipment for combustible waste
AU2005241259B2 (en) * 2004-05-10 2010-05-13 Flsmidth A/S Method and apparatus for incineration of combustible waste
US8535053B2 (en) 2004-05-10 2013-09-17 Flsmidth A/S Method and apparatus for incineration of combustible waste
CN109569239A (en) * 2018-12-06 2019-04-05 山东中旭节能环保科技有限公司 A kind of method of new dry process rotary kiln denitrification
CN112546833A (en) * 2020-02-29 2021-03-26 天瑞集团光山水泥有限公司 Ammonia-free denitration method and device for tail gas in cement kiln production

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