FR2362658A1 - PROCESS FOR REMOVING NITROGEN OXIDES AND SULFUR OXIDES SIMULTANEOUSLY FROM EXHAUST GASES OR VENT - Google Patents

PROCESS FOR REMOVING NITROGEN OXIDES AND SULFUR OXIDES SIMULTANEOUSLY FROM EXHAUST GASES OR VENT

Info

Publication number
FR2362658A1
FR2362658A1 FR7725709A FR7725709A FR2362658A1 FR 2362658 A1 FR2362658 A1 FR 2362658A1 FR 7725709 A FR7725709 A FR 7725709A FR 7725709 A FR7725709 A FR 7725709A FR 2362658 A1 FR2362658 A1 FR 2362658A1
Authority
FR
France
Prior art keywords
absorber
liquor
oxidation apparatus
removing nitrogen
vent
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.)
Withdrawn
Application number
FR7725709A
Other languages
French (fr)
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Publication of FR2362658A1 publication Critical patent/FR2362658A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

La présente invention concerne un procédé d'enlèvement d'oxydes d'azote NOx et d'oxydes de soufre SOx simultanément à partir de gaz d'échappement. Ce procédé comprend les étapes d'oxyder le monooxyde d'azote NO dans le gaz d'échappement dans un appareil d'oxydation 2 de NO, d'amener le gaz déchargé de l'appareil d'oxydation 2 dans un absorbeur 3 dans lequel le gaz contacte une liqueur contenant un composé de calcium tel que l'hydroxyde de calcium et deux types d'additifs pour faciliter l'absorption, d'amener la liqueur chargée de l'absorbeur 3 dans un appareil d'oxydation 4 au sulfite de calcium pour produire du gypse, maintenir la valeur de pH de la liqueur inférieure à 4,0 dans une conduite entre l'absorbeur 3 et l'appareil 4 incluant le fond de l'absorbeur 3, et ajouter un nitrite à la liqueur s'écoulant en aval de l'appareil d'oxydation 4. Ce procédé évite la pollution des rivières ou de la mer et est plus économique.The present invention relates to a method of removing nitrogen oxides NOx and sulfur oxides SOx simultaneously from exhaust gas. This method comprises the steps of oxidizing nitrogen monooxide NO in the exhaust gas in an NO oxidation apparatus 2, of feeding the gas discharged from the oxidation apparatus 2 into an absorber 3 in which the gas contacts a liquor containing a calcium compound such as calcium hydroxide and two types of additives to facilitate absorption, to bring the charged liquor from absorber 3 into a sulphite oxidation apparatus 4 of calcium to produce gypsum, maintain the pH value of the liquor below 4.0 in a line between absorber 3 and apparatus 4 including the bottom of absorber 3, and add nitrite to the liquor s' flowing downstream of the oxidation apparatus 4. This process avoids pollution of rivers or the sea and is more economical.

FR7725709A 1976-08-24 1977-08-23 PROCESS FOR REMOVING NITROGEN OXIDES AND SULFUR OXIDES SIMULTANEOUSLY FROM EXHAUST GASES OR VENT Withdrawn FR2362658A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10079476A JPS5326277A (en) 1976-08-24 1976-08-24 Removing method of sulfur oxides and nitrogen oxides

Publications (1)

Publication Number Publication Date
FR2362658A1 true FR2362658A1 (en) 1978-03-24

Family

ID=14283322

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7725709A Withdrawn FR2362658A1 (en) 1976-08-24 1977-08-23 PROCESS FOR REMOVING NITROGEN OXIDES AND SULFUR OXIDES SIMULTANEOUSLY FROM EXHAUST GASES OR VENT

Country Status (4)

Country Link
JP (1) JPS5326277A (en)
DE (1) DE2737398A1 (en)
FR (1) FR2362658A1 (en)
GB (1) GB1547325A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4843980A (en) * 1988-04-26 1989-07-04 Lucille Markham Composition for use in reducing air contaminants from combustion effluents
JP2695680B2 (en) * 1990-06-25 1998-01-14 三菱重工業株式会社 Flue gas desulfurization method
CN102078762A (en) * 2010-12-22 2011-06-01 浙江天蓝环保技术有限公司 Nitrite wastewater denitrification process after wet denitration
US8734741B1 (en) * 2012-04-30 2014-05-27 Linde Aktiengesellschaft Methods for removing contaminants from exhaust gases
CN115212704B (en) * 2022-06-27 2023-09-22 江西江投电力技术与试验研究有限公司 Flue tail gas adjusting system for coal-fired power plant for microalgae cultivation

Also Published As

Publication number Publication date
GB1547325A (en) 1979-06-13
DE2737398A1 (en) 1978-03-02
JPS5326277A (en) 1978-03-10

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Legal Events

Date Code Title Description
ST Notification of lapse