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JPS5547121A - Starting of operation in exhaust smoke denitration apparatus - Google Patents

Starting of operation in exhaust smoke denitration apparatus

Info

Publication number
JPS5547121A
JPS5547121A JP11915078A JP11915078A JPS5547121A JP S5547121 A JPS5547121 A JP S5547121A JP 11915078 A JP11915078 A JP 11915078A JP 11915078 A JP11915078 A JP 11915078A JP S5547121 A JPS5547121 A JP S5547121A
Authority
JP
Japan
Prior art keywords
valves
catalyst
opened
denitration
closed
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
JP11915078A
Other languages
Japanese (ja)
Other versions
JPS5751333B2 (en
Inventor
Kazutaka Katsurahara
Yasushi Ishibashi
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.)
Sumitomo Heavy Industries Ltd
Eneos Corp
Original Assignee
Nippon Mining Co Ltd
Sumitomo 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 Nippon Mining Co Ltd, Sumitomo Heavy Industries Ltd filed Critical Nippon Mining Co Ltd
Priority to JP11915078A priority Critical patent/JPS5547121A/en
Publication of JPS5547121A publication Critical patent/JPS5547121A/en
Publication of JPS5751333B2 publication Critical patent/JPS5751333B2/ja
Granted legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

PURPOSE: To prolong the service life of a catalyst and a denitration apparatus by previously heat-exchanging exhaust gas from a boiler with the catalyst in the denitration apparatus at the time of starting of operation to elevate the temperature of the catalyst and prevent the deterioration thereof.
CONSTITUTION: At the time of starting of the operation of a boiler 1, valves 5, 7 to 9 are closed, valves 6, 10 are opened and a preheater 4 for air is operated to heat exhaust gas containing nitrogen oxides and sulfur oxides. When air at the outlet of the preheater 4 reaches about 200°C, the valves 8, 9 are opened and the valve 10 is closed. The pre-heating is continued until the temperature of a catalyst in a denitration apparatus 3 reaches above 120°C. After the completion of the pre-heating, the valve 10 is opened and the valves 8, 9 are closed. Then the valves 5, 7 are opened, the valve 6 is closed and the exhaust gas is subjected to a denitration reducing reaction in the denitration apparatus. Dew-point corrosion due to sulfuric acid produced from SO3 can be prevented, the deterioration of the catalyst for the denitration can also be prevented and the life of the apparatus is prolonged.
COPYRIGHT: (C)1980,JPO&Japio
JP11915078A 1978-09-29 1978-09-29 Starting of operation in exhaust smoke denitration apparatus Granted JPS5547121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11915078A JPS5547121A (en) 1978-09-29 1978-09-29 Starting of operation in exhaust smoke denitration apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11915078A JPS5547121A (en) 1978-09-29 1978-09-29 Starting of operation in exhaust smoke denitration apparatus

Publications (2)

Publication Number Publication Date
JPS5547121A true JPS5547121A (en) 1980-04-03
JPS5751333B2 JPS5751333B2 (en) 1982-11-01

Family

ID=14754146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11915078A Granted JPS5547121A (en) 1978-09-29 1978-09-29 Starting of operation in exhaust smoke denitration apparatus

Country Status (1)

Country Link
JP (1) JPS5547121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517514A1 (en) * 1991-06-04 1992-12-09 Research-Cottrell, Inc. Method for nitrogen oxide reduction and flue gas reheating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517514A1 (en) * 1991-06-04 1992-12-09 Research-Cottrell, Inc. Method for nitrogen oxide reduction and flue gas reheating
JPH05228341A (en) * 1991-06-04 1993-09-07 Res Cottrell Inc Method for reducing nitrogen oxide and reheating flue gas

Also Published As

Publication number Publication date
JPS5751333B2 (en) 1982-11-01

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