JPS5486474A - Treating method for exhaust gas containing nitrogen oxides - Google Patents

Treating method for exhaust gas containing nitrogen oxides

Info

Publication number
JPS5486474A
JPS5486474A JP15449677A JP15449677A JPS5486474A JP S5486474 A JPS5486474 A JP S5486474A JP 15449677 A JP15449677 A JP 15449677A JP 15449677 A JP15449677 A JP 15449677A JP S5486474 A JPS5486474 A JP S5486474A
Authority
JP
Japan
Prior art keywords
catalyst
gas
exhaust gas
sox
tower
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
JP15449677A
Other languages
Japanese (ja)
Other versions
JPS5817644B2 (en
Inventor
Akira Kato
Shinpei Matsuda
Shigeo Uno
Yuichi Kamo
Yoichi Sakuta
Fumito Nakajima
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.)
Hitachi Ltd
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
Hitachi 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 Babcock Hitachi KK, Hitachi Ltd filed Critical Babcock Hitachi KK
Priority to JP52154496A priority Critical patent/JPS5817644B2/en
Publication of JPS5486474A publication Critical patent/JPS5486474A/en
Publication of JPS5817644B2 publication Critical patent/JPS5817644B2/en
Expired 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

  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Treating Waste Gases (AREA)

Abstract

PURPOSE: To efficiently treat exhaust gas by taking out catalyst the activity of which has been lowered owing to salt deposition; regenerating the catalyst with heating; and selectively absorbing SOx in gas scattered from the catalyst surface to recycle NH3.
CONSTITUTION: After adding a predetermined amt. of ammonia 2, exhaust gas 1 contacts with denitration catalyst 4 based on TiO2 and/or SnO2 at 150W330°C in denitration tower 3 to reduce NOx to N2 and H2O. At this time, SO3 out of SOx contained in gas 1 reacts with NH3 to form (NH4)2SO4, which is deposited on catalyst 4, lowering the catalytic activity. So, part of catalyst 4 is taken out and fed to regeneration tower 5, where hot gas 6 of 350W600°C is passed to evaporate the (NH4)2SO4, thus regenerating the catalyst. The hot gas contg. NH3 and SOx is fed to SOx removal tower 7, where the SO3 alone is absorbed with SO3 absorbent 8, and the NH3-contg. gas is added to untreated exhaust gas 1 and reused.
COPYRIGHT: (C)1979,JPO&Japio
JP52154496A 1977-12-23 1977-12-23 Treatment method for exhaust gas containing nitrogen oxides Expired JPS5817644B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52154496A JPS5817644B2 (en) 1977-12-23 1977-12-23 Treatment method for exhaust gas containing nitrogen oxides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52154496A JPS5817644B2 (en) 1977-12-23 1977-12-23 Treatment method for exhaust gas containing nitrogen oxides

Publications (2)

Publication Number Publication Date
JPS5486474A true JPS5486474A (en) 1979-07-10
JPS5817644B2 JPS5817644B2 (en) 1983-04-08

Family

ID=15585508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52154496A Expired JPS5817644B2 (en) 1977-12-23 1977-12-23 Treatment method for exhaust gas containing nitrogen oxides

Country Status (1)

Country Link
JP (1) JPS5817644B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559832A (en) * 1978-10-27 1980-05-06 Sumitomo Heavy Ind Ltd Contact reduction and denitration method of exhausted gas having temperature below 300 c
WO2011090190A1 (en) * 2010-01-25 2011-07-28 いすゞ自動車株式会社 Exhaust purification device and exhaust purification method for diesel engine
WO2011090189A1 (en) * 2010-01-25 2011-07-28 いすゞ自動車株式会社 Exhaust purification device and exhaust purification method for diesel engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106362A (en) * 1976-03-04 1977-09-06 Hitachi Ltd Decomposition of nitrogen oxides by catalytic reduction
JPS5451970A (en) * 1977-09-30 1979-04-24 Kobe Steel Ltd Denitration method from gas containing sulphur oxide and nitrogen oxide
JPS5478359A (en) * 1977-12-06 1979-06-22 Mitsubishi Heavy Ind Ltd Denitration method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52106362A (en) * 1976-03-04 1977-09-06 Hitachi Ltd Decomposition of nitrogen oxides by catalytic reduction
JPS5451970A (en) * 1977-09-30 1979-04-24 Kobe Steel Ltd Denitration method from gas containing sulphur oxide and nitrogen oxide
JPS5478359A (en) * 1977-12-06 1979-06-22 Mitsubishi Heavy Ind Ltd Denitration method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559832A (en) * 1978-10-27 1980-05-06 Sumitomo Heavy Ind Ltd Contact reduction and denitration method of exhausted gas having temperature below 300 c
JPS589693B2 (en) * 1978-10-27 1983-02-22 住友重機械工業株式会社 Catalytic reduction denitrification method for exhaust gas with a temperature of 300°C or less
WO2011090190A1 (en) * 2010-01-25 2011-07-28 いすゞ自動車株式会社 Exhaust purification device and exhaust purification method for diesel engine
WO2011090189A1 (en) * 2010-01-25 2011-07-28 いすゞ自動車株式会社 Exhaust purification device and exhaust purification method for diesel engine
JP2011149401A (en) * 2010-01-25 2011-08-04 Isuzu Motors Ltd Exhaust emission control device and exhaust emission control method for diesel engine
JP2011149400A (en) * 2010-01-25 2011-08-04 Isuzu Motors Ltd Exhaust emission control device and exhaust emission control method for diesel engine
US8636970B2 (en) 2010-01-25 2014-01-28 Isuzu Motors Limited Exhaust purification device and exhaust purification method for diesel engine

Also Published As

Publication number Publication date
JPS5817644B2 (en) 1983-04-08

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