US3370634A - Apparatus for burning exhaust combustion gases - Google Patents

Apparatus for burning exhaust combustion gases Download PDF

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Publication number
US3370634A
US3370634A US545184A US54518466A US3370634A US 3370634 A US3370634 A US 3370634A US 545184 A US545184 A US 545184A US 54518466 A US54518466 A US 54518466A US 3370634 A US3370634 A US 3370634A
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US
United States
Prior art keywords
air
mixture
combustion gases
preheater
valve
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.)
Expired - Lifetime
Application number
US545184A
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English (en)
Inventor
Mair Josef
Schwienbacher Franz
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Individual
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Individual
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Filing date
Publication date
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Publication of US3370634A publication Critical patent/US3370634A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B5/00—Combustion apparatus with arrangements for burning uncombusted material from primary combustion
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
    • F23B80/04—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for guiding the flow of flue gases, e.g. baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B2700/00—Combustion apparatus for solid fuel
    • F23B2700/022—Combustion apparatus for solid fuel with various types of fume afterburners
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • ABSTRACT F THE DISCLGSURE An apparatus integrated with a boiler to burn exhaust combustion gases which functions to draw otf and mix combustion gases With air and to cause the heating of this mixture to flaming temperature, wherein the mixing is achieved in a body having a tortuous passageway to pro vide thorough mixing, the body is mounted above the boiler flame to fa-cilitate heating of the mixture, and the discharge of the mixture is at the upper surface of the llame of the boiler which provides assurance that there will be complete combustion of the mixture.
  • This invention concerns a process and apparatus for intimately mixing, in the top surface of the flames of a furnace, preheated supplementary air with the combustion gases in order to obtain complete combustion of said gases and, consequently, economy in fuel and avoiding any soot at the outlet of the flue.
  • the path of the air, or mixture of air and smoke, in the furnace is not sutlciently long to ensure intense preheating of the air or mixture.
  • the invention proposes to locate in the top surface of the ames a preheating device formed by a body, the length and width of which is slightly less than the length and width of the opening or aperture of the flow of the combustion gases in said top limits.
  • a preheating device formed by a body, the length and width of which is slightly less than the length and width of the opening or aperture of the flow of the combustion gases in said top limits.
  • Formed in this body is a spiral having several Iturns for the iow of the air or mixture, the last turn communicating with a ring which encloses the preheater in a plane lying in the direction of the ow of the llames and which is provided, at least on one face, with a ring of bores directed perpendicularly to the direction of the ow of the ilames.
  • the large dimensions of the preheater relative to the aperture of the flow from the furnace result in two advantages.
  • the path of the air or mixture is greatly lengthened without excessively increasing the flow resistance, so that the air or mixture is readily preheated to the temperature of the llames.
  • the throttle caused by the presence of the preheater in the cross-section of the ow of the llames, at the place where the latter impact normally with jets issuing from the crown or crowns of bores of the ring of the preheater makes the gaseous ow extremely turbulent and the intimate mixture of the gas with the air or ymixture is appreciably improved relatively to that obtainable in known devices. Due to the com- ICC bination of the above two advantages, substantially complete combustion of the soot and carbon monoxide is obtained.
  • smoke and air taken up respectively from the chimney and the atmosphere in separately controlled quantities, travel together a relatively long path in the same tube, thus mixing together intimately before reaching the intake of a fan from whi-ch air or mixture is fed, which then, through successive Abranches of the feed pipe, is divided in a first ilow which enters the preheater, a second flow which flows out just below the latter, and a third flow which issued over the grid of the furnace.
  • the supply of mixture or air exceeding the requirements of the preheater is fed to be consumed under the latter or on the grid of the furnace. Since the second and third branch are iitted wi-th control valves, it is possible to distribute the three supplies of air or mixture according to the operating conditions of the boiler.
  • FIG. l is a longitudinal section through a boiler provided with the device according to the invention.
  • FIG. 2 is a longitudinal section through a preheater according to the invention.
  • a controllable valve 2 Provided in a flue 1 is a controllable valve 2.
  • a fan 5 takes up smoke from the flue 1 in front of the valve 2, and atmospheric air through a valve 3 which is controllable externally and communicates with the pipe 4 through a nozzle having a knee bend, the opening of which is turned in in the direction of ow of smoke so that the meeting of the latter with the air takes place under the best conditions.
  • the bend in the pipe 4 which takes up smoke from the ue 1 is provided with a valve 4a so that:
  • the feed pipe of the fan 5 has 3 branches: The first, indicated by 7, through which the air or mixture passes to the preheater 6; the second indicated by 8 and provided with a control valve 8a, through which branch an initial supply of air or mixture exceeding the requirements of the preheater 6 is lconsumed immediately below the latter; the third indicated by 9 is provided with a control valve 9a, through which branch a second excess supply of air or mixture is consumed in the dame of the naphtha burner, in the embodiment indicated by 10 and immediately above the grid of the furnace.
  • a known valve for controlling the general draught is indicated.
  • the air of mixture ows into the body 6 of the preheater.
  • Such body has an elongated form with an almost square cross section and has external iins. Its normal projection in plan in the direction of the outlet for the ames is of such dimensions as to block a large portion of the outlet itself.
  • the preheater is closed at the ends by the removable covers 6a, 6b and is provided with Van inner pipe coil 6c which is connected at the inlet to the branch 7 and communicates with a ring 6d which encloses the centre area of the body 6 externally in a plane transversely thereto.
  • a ring of small bores is formed along the longitudinal axis of the preheater, thus perpendicular to the flow of the flames.
  • the air or mixture entering the body 6 through the conduit 7 passes through the entire coil 6c, at the end of which the air or mixture, heated .to the temperature of the ames, passes into the ring 6d from the bores of which the air or mixture issues in a form of a ring of jets 11 which meet the ow of llames at an angle of 90 in the top surface thereof, which zone is made turbulent by the constriction of the outflow of thecurrent, caused by the presence of the body 6.
  • the intimate mixing at .the same temperature and under a turbulent condition of the jets of air Ior mixture with the ames on a ring located within .the
  • the air intake valveV 3 and the smoke intake valve 4a, the fan and the valve 8a, 9a are according to the type of installation preadjusted once and for all in reciprocal concordance according to any one of known systems of apparatus VAfor s returning a mixture of air and smoke to the furnace.
  • a fan having an'inlet connected to said supply pipe and an outlet having a first branch connected to said inlet conduit of said externally 'nned body ketective to cause the flow of a mixture of said combustion gas and air to said externally iinned body, Vand second and third vbranches of said fan outlet each with a valve therein effective -to accommodate any excessive amount of lsaid mixture of combustion gas and air and connected to respectively discharge any said excessive mixture between said burner and said externally finned body and beneath said burner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Air Supply (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Incineration Of Waste (AREA)
US545184A 1965-03-03 1966-03-21 Apparatus for burning exhaust combustion gases Expired - Lifetime US3370634A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT472365 1965-03-03
IT1275565 1965-06-08

Publications (1)

Publication Number Publication Date
US3370634A true US3370634A (en) 1968-02-27

Family

ID=26325574

Family Applications (1)

Application Number Title Priority Date Filing Date
US545184A Expired - Lifetime US3370634A (en) 1965-03-03 1966-03-21 Apparatus for burning exhaust combustion gases

Country Status (7)

Country Link
US (1) US3370634A (de)
AT (1) AT261086B (de)
BE (1) BE675260A (de)
CH (1) CH513366A (de)
FR (1) FR1464435A (de)
GB (1) GB1126981A (de)
NL (1) NL6602162A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076774A1 (en) * 2014-09-11 2016-03-17 Colorado State University Research Foundation Side-Feed Forced-Air Biomass Burning Cookstove

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2283631A (en) * 1938-07-21 1942-05-19 James T Shipman Apparatus for burning fuel
US3146821A (en) * 1960-08-29 1964-09-01 Fred H Wuetig Method of and apparatus for governing the operation of furnaces
US3291182A (en) * 1965-02-23 1966-12-13 Dow Means for improving combustion of fuel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2283631A (en) * 1938-07-21 1942-05-19 James T Shipman Apparatus for burning fuel
US3146821A (en) * 1960-08-29 1964-09-01 Fred H Wuetig Method of and apparatus for governing the operation of furnaces
US3291182A (en) * 1965-02-23 1966-12-13 Dow Means for improving combustion of fuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076774A1 (en) * 2014-09-11 2016-03-17 Colorado State University Research Foundation Side-Feed Forced-Air Biomass Burning Cookstove

Also Published As

Publication number Publication date
NL6602162A (de) 1966-09-05
FR1464435A (fr) 1966-12-30
GB1126981A (en) 1968-09-11
BE675260A (de) 1966-05-16
CH513366A (fr) 1971-09-30
AT261086B (de) 1968-04-10

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