WO1992019914A1 - Procede de combustion combine avec le traitement des gaz d'echappement - Google Patents

Procede de combustion combine avec le traitement des gaz d'echappement Download PDF

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Publication number
WO1992019914A1
WO1992019914A1 PCT/AT1992/000059 AT9200059W WO9219914A1 WO 1992019914 A1 WO1992019914 A1 WO 1992019914A1 AT 9200059 W AT9200059 W AT 9200059W WO 9219914 A1 WO9219914 A1 WO 9219914A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion
catalyst
indicates
ammonia
catalyst solution
Prior art date
Application number
PCT/AT1992/000059
Other languages
German (de)
English (en)
Inventor
Viktor Zitny
Mirko VRAGOVIC^´
Simo NADINIC^´
Cedomir Kotnik
Milan KRAJNOVIC^´
Gradimir Strbac
Original Assignee
Industrie- Und Bergbaugesellschaft Pryssok & Co. Kg
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 Industrie- Und Bergbaugesellschaft Pryssok & Co. Kg filed Critical Industrie- Und Bergbaugesellschaft Pryssok & Co. Kg
Publication of WO1992019914A1 publication Critical patent/WO1992019914A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J7/00—Arrangement of devices for supplying chemicals to fire

Definitions

  • the present invention relates to a combined method for increasing the degree of conversion in the combustion of fuels and for removing sulfur and nitrogen oxides from the exhaust gases.
  • This method is important in all fields of technology where the combustion of fuels is necessary for the generation of energy or for carrying out chemical processes without environmental pollution. This is most often done in steam and hot water boilers and in industrial furnaces, where, for reasons of economy and concern for the environment, each * combustion process should take place optimally and the resulting exhaust gases must be released into the environment in a cleaned state.
  • the complete combustion of the fuels in the boilers depends on many factors, such as on the quality of the burner, the excess air, the size reduction of the solid fuels, the function of the grate, the admixtures in the fuel, etc.
  • the completeness of the combustion is best determined from the amount of unburned fuel or the combustible components contained in the exhaust gas, e.g. are: carbon monoxide, unburned hydrocarbons, unburned solid particles etc.
  • An aqueous solution of an organic copper salt with traces of a vanadium compound is preferably used as the catalyst solution.
  • Copper acetate has proven particularly advantageous as the copper salt and vanadium pentoxide as the vanadium compound.
  • the copper acetate content of the liquid catalyst solution is advantageously 4 to 6% by weight, preferably approximately 5% by weight.
  • the concentration of the vanadium penide does not matter, since the material is used catalytically.
  • the amounts of sulfur dioxide and nitrogen monoxide still contained in the combustion gases are then oxidized to sulfur trioxide or nitrogen dioxide by the action of an oxidizing agent.
  • Hydrogen peroxide has proven to be particularly advantageous as the oxidizing agent. This is advantageously used in the form of an approximately 35% aqueous solution.
  • the hydrogen peroxide solution is best sprayed into the combustion exhaust gases.
  • ammonia is now added to the exhaust gases.
  • the temperature of the exhaust gases in the neutralization zone is preferably at most 300 ° C. At higher temperatures, the formation of nitrogen oxides is risked.
  • the ammonia in the neutralization gases can be added in gaseous form as NH 3 or in the form of an ammonium hydroxide solution, as a result of which water is introduced into the system at the same time.
  • ammonium sulfate is a product with a high utility value since it is used as an artificial fertilizer.
  • the nitrogen oxides are removed from the exhaust gases in a similar manner, namely after the following reaction:
  • the separation of the resulting neutralization salts from the exhaust gas is advantageously carried out in bag filters so that the salts formed can be obtained directly as solids.
  • the method according to the invention is best implemented in a boiler system. Such an installation is shown schematically in the accompanying drawing, in which to an incinerator 4 combustion air is at least partially brought into contact with the liquid catalyst in a vessel 1.
  • the sulfur and nitrogen oxides contained in the combustion gases are further oxidized with an oxidizing agent which is supplied from the storage container 2.
  • An aqueous hydrogen peroxide solution is best suited for this purpose.
  • An ammonia-air mixture in a mixing ratio of preferably 1:20 is fed into the boiler zone 3 at a temperature which preferably does not exceed 300 ° C., as a result of which the sulfur and nitrogen oxides are neutralized.
  • the salts formed are discharged as solids or rinsed out with water, whereupon the cleaned exhaust gases can be discharged outside through the chimney 5 without posing any risk to the environment.
  • a boiler that delivers 1,000 tons of steam per hour is heated with a coal that delivers 10 MJ / kg with 4% sulfur and 10% CaO. 1.4 million m 3 of flue gases are produced per hour, which contain approx. 16,000 mg S0 2 / m 3 .
  • the catalyst solution which contains 5% by weight of copper acetate and traces of vanadium pentoxide, is used in an amount of 2 ⁇ 8000 1 / year. With a hydrogen peroxide quantity of 2500 kg / h, the optimal oxidation of the flue gases takes place. Approx. 1500 kg / h ammonia are washed out of the flue gases in the ammonium absorber.
  • ammonium salts which can be used as artificial fertilizers and therefore contribute to the economy of the process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

Par un procédé combiné dans lequel la combustion de carburants s'effectue avec l'aide d'un catalyseur et dans lequel les oxydes de soufre et d'azote produits sont oxydés par l'action d'un oxydant jusqu'à leur degré d'oxydation supérieur et ensuite neutralisés par l'ammoniaque, on peut, d'une part, parvenir à une meilleure utilisation des carburants et obtenir des gaz d'échappement dont les teneurs en oxyde de soufre et d'azote sont diminués pour protéger l'environnement. Les sels d'ammonium produits peuvent, d'autre part, être utilisés comme engrais et contribuer ainsi à la rentabilité du procédé.
PCT/AT1992/000059 1991-04-25 1992-04-27 Procede de combustion combine avec le traitement des gaz d'echappement WO1992019914A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT86691A AT395383B (de) 1991-04-25 1991-04-25 Kombiniertes verfahren zur steigerung des umsetzungsgrades bei der verbrennung von brennstoffen und zur beseitigung von schwefelund stickoxiden aus den abgasen
ATA866/91 1991-04-25

Publications (1)

Publication Number Publication Date
WO1992019914A1 true WO1992019914A1 (fr) 1992-11-12

Family

ID=3501625

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1992/000059 WO1992019914A1 (fr) 1991-04-25 1992-04-27 Procede de combustion combine avec le traitement des gaz d'echappement

Country Status (3)

Country Link
AT (1) AT395383B (fr)
AU (1) AU1681692A (fr)
WO (1) WO1992019914A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067448A1 (fr) * 2003-01-17 2004-08-12 The United States Government, As Represented By The Administrator Of The National Aeronautics And Space Administration Decomposition du peroxyde d'hydrogene et oxydation du monoxyde d'azote

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE673694A (fr) *
FR2399270A1 (fr) * 1977-08-05 1979-03-02 Rohrbach Rudolf Procede pour eliminer dans des gaz de fumee les oxydes de soufre resultant de la combustion de matieres fossiles
US4173450A (en) * 1976-03-29 1979-11-06 Allied Energy Corporation Device for injecting air processed to increase its humidity into oil burning furnaces
JPS5662528A (en) * 1979-10-29 1981-05-28 Mitsubishi Heavy Ind Ltd Method for decreasing nitrogen oxide in combustion exaust gas

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287090A (en) * 1979-07-30 1981-09-01 Pfefferle William C Method of treating flue deposits and composition therefor
DE3625720A1 (de) * 1986-07-30 1988-02-11 Kloeckner Humboldt Deutz Ag Reinigung so(pfeil abwaerts)2(pfeil abwaerts)- und no(pfeil abwaerts)x(pfeil abwaerts)-haltiger rauchgase
AT391873B (de) * 1988-10-03 1990-12-10 Lang Chem Tech Prod Waessrige katalysatorloesung sowie brennstoffe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE673694A (fr) *
US4173450A (en) * 1976-03-29 1979-11-06 Allied Energy Corporation Device for injecting air processed to increase its humidity into oil burning furnaces
FR2399270A1 (fr) * 1977-08-05 1979-03-02 Rohrbach Rudolf Procede pour eliminer dans des gaz de fumee les oxydes de soufre resultant de la combustion de matieres fossiles
JPS5662528A (en) * 1979-10-29 1981-05-28 Mitsubishi Heavy Ind Ltd Method for decreasing nitrogen oxide in combustion exaust gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 5, no. 128 (C-067)18. August 1981 & JP,A,56 062 528 ( MITSUBISHI ) 28. Mai 1981 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004067448A1 (fr) * 2003-01-17 2004-08-12 The United States Government, As Represented By The Administrator Of The National Aeronautics And Space Administration Decomposition du peroxyde d'hydrogene et oxydation du monoxyde d'azote

Also Published As

Publication number Publication date
ATA86691A (de) 1992-05-15
AT395383B (de) 1992-12-10
AU1681692A (en) 1992-12-21

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