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JPS5494472A - Reduction of nitrogen oxides in combustion exhaust gas - Google Patents

Reduction of nitrogen oxides in combustion exhaust gas

Info

Publication number
JPS5494472A
JPS5494472A JP85578A JP85578A JPS5494472A JP S5494472 A JPS5494472 A JP S5494472A JP 85578 A JP85578 A JP 85578A JP 85578 A JP85578 A JP 85578A JP S5494472 A JPS5494472 A JP S5494472A
Authority
JP
Japan
Prior art keywords
added
exhaust gas
air
oxygen
combustion exhaust
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
JP85578A
Other languages
Japanese (ja)
Other versions
JPS5836620B2 (en
Inventor
Nobuaki Murakami
Yutaka Yamashita
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP53000855A priority Critical patent/JPS5836620B2/en
Publication of JPS5494472A publication Critical patent/JPS5494472A/en
Publication of JPS5836620B2 publication Critical patent/JPS5836620B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Chimneys And Flues (AREA)
  • Treating Waste Gases (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

PURPOSE: To reeuce NOx present in combusion exhaust gas without generating soot and smoke and with high denitrification rate by the procedure in which a reducing agent consisting of an oxygen-containing hydrocarbon containing a fixed proportion of an oxygen-free hydrocarbon or H2 is added to the high temperature portion of combustion exhaust gas and then air is added to the rear flow of the gas.
CONSTITUTION: A fuel and primary air are charged into the surface 1d of the boiler 1 for power generation for combustion, and then the reducing agent 3 consisting of an oxygen-free hydrocarbon (A), e.g., methane, kerosine, etc., supplied from the line 5 and an oxygen-containing hydrocarbon (B), e.g., alcohols, or H2, supplied from the line 4 is added to the combustion exhaust gas to convert most of NOx into N2, HCN, NH3, etc., and at the same time to generate CO. In this case, the proportion of the reducting agent B to be added is regulated to 0.3 to 0.95 by weight on the whole (A + B) amount basis. Then, air is added to the gas to completely burn off a considerable amount of CO and a small amount of unburned substances HCN, NH3, etc., formed at the precombustion stage to CO2, H2O, N2, etc., which are released through the air preheater 7 and chimney 8 to the air.
COPYRIGHT: (C)1979,JPO&Japio
JP53000855A 1978-01-10 1978-01-10 Method for reducing nitrogen oxides in combustion exhaust gas Expired JPS5836620B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53000855A JPS5836620B2 (en) 1978-01-10 1978-01-10 Method for reducing nitrogen oxides in combustion exhaust gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53000855A JPS5836620B2 (en) 1978-01-10 1978-01-10 Method for reducing nitrogen oxides in combustion exhaust gas

Publications (2)

Publication Number Publication Date
JPS5494472A true JPS5494472A (en) 1979-07-26
JPS5836620B2 JPS5836620B2 (en) 1983-08-10

Family

ID=11485254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53000855A Expired JPS5836620B2 (en) 1978-01-10 1978-01-10 Method for reducing nitrogen oxides in combustion exhaust gas

Country Status (1)

Country Link
JP (1) JPS5836620B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08145030A (en) * 1994-11-17 1996-06-04 Kameyama Hozumi Fastening member

Also Published As

Publication number Publication date
JPS5836620B2 (en) 1983-08-10

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