JPS5472763A - Denitrating method - Google Patents

Denitrating method

Info

Publication number
JPS5472763A
JPS5472763A JP13992977A JP13992977A JPS5472763A JP S5472763 A JPS5472763 A JP S5472763A JP 13992977 A JP13992977 A JP 13992977A JP 13992977 A JP13992977 A JP 13992977A JP S5472763 A JPS5472763 A JP S5472763A
Authority
JP
Japan
Prior art keywords
gas
temp
header
superheater
atmosphere
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
JP13992977A
Other languages
Japanese (ja)
Inventor
Taiji Kamiguchi
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 Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP13992977A priority Critical patent/JPS5472763A/en
Publication of JPS5472763A publication Critical patent/JPS5472763A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To remove NOx completely and that without residual NH3 in denitration of exhaust gas, by addn. of excessive reducing agent into high-temp. atmosphere in downstream side.
CONSTITUTION: To remove NOx contained in exhaust combustion gas of a boiler 1, NH3 is sprayed into the exhaust gas respectively through a header 14a located at upstream side of a secondary superheater 4, which is in high-temp. atmosphere not lowr than about 700°C, and through a header 14b located between superheater 4 and a repeater 5. If necessary, NH3 is sprayed through a header 18 located at the upstream side of a primary superheater 6. Then H2O2 is fed by a H2O2 spray feeding apparatus 32 into the low-temp. exhaust gas atmosphere of about 500W 600°C between the primary superheater 6 and an economizer 7 in order to remove residual NOx. Gas gathered by a gas collector 33 is analyzed 24. The signal of the analyzed value and the measurement signal from a gas flow meter 34 are fed to a control box 25. The command given by the control box 25 controls the valve 36 in the H2O2 feed-pipe and flow control valves 16, 16a for NH3.
COPYRIGHT: (C)1979,JPO&Japio
JP13992977A 1977-11-24 1977-11-24 Denitrating method Pending JPS5472763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13992977A JPS5472763A (en) 1977-11-24 1977-11-24 Denitrating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13992977A JPS5472763A (en) 1977-11-24 1977-11-24 Denitrating method

Publications (1)

Publication Number Publication Date
JPS5472763A true JPS5472763A (en) 1979-06-11

Family

ID=15256942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13992977A Pending JPS5472763A (en) 1977-11-24 1977-11-24 Denitrating method

Country Status (1)

Country Link
JP (1) JPS5472763A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017347A (en) * 1987-02-13 1991-05-21 Fuel Tech, Inc. Process for nitrogen oxides reduction and minimization of the production of other pollutants
US5057293A (en) * 1987-02-13 1991-10-15 Fuel Tech, Inc. Multi-stage process for reducing the concentration of pollutants in an effluent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017347A (en) * 1987-02-13 1991-05-21 Fuel Tech, Inc. Process for nitrogen oxides reduction and minimization of the production of other pollutants
US5057293A (en) * 1987-02-13 1991-10-15 Fuel Tech, Inc. Multi-stage process for reducing the concentration of pollutants in an effluent

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