EP0252257A1 - Dispositif de combustion des particules solides contenues dans les gaz d'échappement des moteurs à combustion interne - Google Patents

Dispositif de combustion des particules solides contenues dans les gaz d'échappement des moteurs à combustion interne Download PDF

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Publication number
EP0252257A1
EP0252257A1 EP87107312A EP87107312A EP0252257A1 EP 0252257 A1 EP0252257 A1 EP 0252257A1 EP 87107312 A EP87107312 A EP 87107312A EP 87107312 A EP87107312 A EP 87107312A EP 0252257 A1 EP0252257 A1 EP 0252257A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
overflow opening
combustion
chamber
exhaust gas
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
EP87107312A
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German (de)
English (en)
Other versions
EP0252257B1 (fr
Inventor
Hubert Dettling
Rolf Dr. Dipl.-Ing. Leonhard
Ulrich Dr. Dipl.-Ing. Projahn
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0252257A1 publication Critical patent/EP0252257A1/fr
Application granted granted Critical
Publication of EP0252257B1 publication Critical patent/EP0252257B1/fr
Expired legal-status Critical Current

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    • 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
    • F23G7/066—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 preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/26—Construction of thermal reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/38—Arrangements for igniting

Definitions

  • the invention relates to a combustion device for solid particles according to the preamble of the main claim.
  • DE-OS 34 24 196 To remove soot from the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine, it is already known from DE-OS 34 24 196 to separate the soot particles from the exhaust gas by means of an electrostatic soot switch and to feed them to a combustion device for combustion.
  • the combustion device with the characterizing features of the main claim has the advantage that a hot core zone, maintained by the bell in a limited volume, forms in the combustion flame, in which the temperature is far above the ignition temperature of the soot particles.
  • a recirculation flow occurs in this area during the combustion, so that the soot particles stay in the hot zone and a safe combustion is therefore ensured.
  • An advantageous development according to the features of claim 2 extends the dwell time of the soot particles in the high temperature range, so that a further increase in the degree of burnout is achieved.
  • the supplied exhaust gas stream and the soot particles carried by it are preheated so that they are heated to the reaction temperature in the hot combustion chamber in a very short time.
  • preliminary reactions are possible which also have a favorable effect on the degree of burnout.
  • a high degree of heat utilization is also achieved through the heat exchange between the outflowing combustion gas and the supplied exhaust gas stream.
  • Other advantageous developments are possible through measures of the combustion device listed in the other subclaims.
  • FIG. 1 shows a combustion device in longitudinal section
  • FIG. 2 shows a glow body in side view
  • FIG. 3 shows the glow body according to FIG. 2 in cross section
  • FIG. 4 shows a third embodiment of a glow body in side view
  • FIG. 5 shows a fourth embodiment of a glow body in longitudinal section
  • FIGS. 6 and 7 a fifth embodiment of a filament in longitudinal and cross section.
  • the exhaust gas flow is first passed through an electrostatic soot switch known from DE-OS 34 24 196 and a centrifugal separator, at the outlet of which exhaust gas escapes, which largely consists of soot and other solid particles is free, and at the other outlet a partial exhaust gas stream emerges, which is enriched with the soot and solid particles that have been separated out.
  • an electrostatic soot switch known from DE-OS 34 24 196 and a centrifugal separator, at the outlet of which exhaust gas escapes, which largely consists of soot and other solid particles is free, and at the other outlet a partial exhaust gas stream emerges, which is enriched with the soot and solid particles that have been separated out.
  • the exhaust gas partial flow is fed to a combustion device described below and shown in the drawing.
  • the combustion device has a combustion chamber 1 in a cylindrical jacket 2 and, following it coaxially, a pilot burner 3 with a fuel mixture processing chamber 4 in a cap-shaped housing 5.
  • the combustion chamber 1 and the processing chamber 4 are connected to one another via an overflow opening 6 in a partition 7, in the overflow opening 6 has the shape of a nozzle narrowing towards the combustion chamber 1.
  • a dip tube 10 projects coaxially against the overflow opening 6, the end 11 of which is axially closed and has a certain distance from the overflow opening 6.
  • the immersion tube 10 Near its end 11, the immersion tube 10 has a plurality, for example two, radial outlets 12 through which the exhaust gas stream 15 fed through the immersion tube 10 and loaded with soot particles 14 enters the combustion chamber 1.
  • the outlets 12 lie within a pipe section 16 which is fastened coaxially to the immersion pipe 10 with a partition 17, so that an annular gap 18 is formed between the outer circumference of the pipe section 16 and the inside of the jacket 2 of the combustion chamber 1.
  • the partition 17 and the part of the pipe section 16 surrounding the outlets 12 of the immersion tube 10 enclose in the form of a bell a hot combustion chamber 19 with a limited volume that is open towards the overflow opening 6.
  • the soot particles 14 emerging from the outlets 12 are ignited and largely burnt in this hot combustion chamber 19.
  • the resulting combustion gases and the incompletely burned soot particles 14 emerge from the outer circumference of the bell-shaped hot combustion chamber 19 and are deflected towards the gap 18 at the end edge of the pipe section 16.
  • a second pipe section 20 projects coaxially, which is fastened to the jacket 2 of the combustion chamber 1 with a flange 21.
  • the pipe sections 16 and 20 divide the combustion chamber 1 into a plurality of interconnected annular gaps 18, 21 and 22, which form a labyrinth system and extend the flow path of the combustion gas.
  • This design of the combustion chamber 1 increases the residence time of the combustion gas and thereby increases the degree of burnout.
  • a collection chamber 25 formed by a cup 24, through which the immersion tube 10 projects and from which an exhaust pipe 26 leads away for the removal of the burner exhaust gases 27.
  • a countercurrent heat exchanger is formed in the innermost annular gap 22 formed by the pipe section 20, which ensures high heat utilization.
  • the hot burner exhaust gases heat the immersion pipe 10 through the immersed exhaust gas stream loaded with soot particles, so that the soot particles 14 emerging from the outlets 12 are brought to reaction temperature within a short time. Because of the preheating in the immersion tube 10, pre-reactions are already possible in the case of diesel exhaust gases which have a residual oxygen content, and these have a favorable effect on the degree of burnout.
  • a fuel supply line 30 and one or more, for example two, air supply lines open into the treatment chamber 4 31, 32.
  • the inlet openings 33, 34 of the air supply lines 31, 32 open in the same direction tangentially into the processing chamber 4 near the partition 7, so that the combustion air flows into the processing chamber 4 with swirl.
  • the fuel supply line 30 opens into a bulge 36 of the processing chamber 4 formed by an extension 35.
  • a glow plug 37 known per se, projects into this eccentric bulge 36 and is supplied with an electric current to start the combustion device.
  • a rotationally symmetrical incandescent body 40 is arranged in the center of the processing chamber 4 of the pilot burner 3. It is attached to the end wall of the housing 5 and extends to the overflow opening 6.
  • the incandescent body 40 has several, for example three, annular ribs 42 protruding radially from a shaft 41, of which the annular ribs 42 near the overflow opening have openings 43 which are uniformly distributed.
  • a control valve 45 or a pump is in the fuel supply line 30 and in the air supply a blower 46 is switched, both of which are controlled by a central control unit 47 so that the amounts of fuel and air required for combustion are metered.
  • Glow plug 37 is also connected to control unit 47. Furthermore, the control unit 47 for flame monitoring in the treatment room 4 of the pilot burner 3 is connected to a sensor 48 inserted into the housing, which can be designed as an optical sensor, as a temperature probe or as an ion current probe.
  • an outer shell 50 surrounds the housing 5 of the pilot burner 3, the jacket 2 of the combustion chamber 1 and the cup 24 of the collecting chamber 25.
  • the blower 46 presses the combustion air 52 necessary for the combustion through the annular space 51 formed by the shell 50, which heats up and simultaneously serves as a coolant for the combustion device.
  • the shell 50 has an inlet connection 53 in the area of the collecting chamber 25 and an outlet connection 54 in the area of the pilot burner 3, which is connected via a line 55 to the air supply lines 31, 32.
  • the glow plug 37 is first supplied with current and, preferably, liquid fuel is fed through the fuel supply line 30 into the bulge 36 of the processing chamber 4.
  • the fan 46 feeds combustion air into the treatment chamber 4 through the two inlet openings 33, 34.
  • the fuel-air mixture ignites in the treatment chamber 4 and the flame strikes through the overflow opening 6 into the bell-shaped hot combustion chamber 19 Time the incandescent body reaches 40 ignition temperature, so that the flame formation is stabilized.
  • the glow plug 37 can now be switched off.
  • the swirl due to the tangential air supply the overflow opening 6 in the hot combustion chamber 19 pilot flame is concentrated by the formation of the overflow opening 6 as a nozzle in the axial direction, so that a very hot combustion core zone is formed in the middle of the hot combustion chamber 19, in which the soot particles 14 are quickly brought to reaction temperature .
  • the combustion exhaust gases flow under further reaction through a relatively long path formed by the annular gaps 18, 21 and 22 into the collection chamber 25 and from there as a clean, cooled exhaust gas.
  • the incandescent body 40 has a cylindrical basic shape, into which four longitudinal grooves 61 are machined crosswise, so that four longitudinal ribs 62 are formed. In the radially outer surface of the longitudinal ribs 62, longitudinal grooves 63 are additionally formed, the depth of which is less than that of the longitudinal grooves 61.
  • longitudinal grooves 65 can be made in the incandescent body 40, as shown in the exemplary embodiment according to FIG.
  • the incandescent body 40 can also have the shape of a cylindrical sleeve 70, the jacket of which is penetrated by a plurality of openings 71, 72 in the bores.
  • the openings 71 run radially to the longitudinal axis of the incandescent body.
  • the openings 72 penetrate the sleeve 70 obliquely to the radial in the exemplary embodiment according to FIGS. 6 and 7, so that the gases which pass through are given a swirl.
  • the parts of the combustion device which are exposed to the high temperatures consist of a high-temperature-resistant material, for example of a nickel-based alloy known under the name "Inconel" or of ceramic.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
EP87107312A 1986-06-30 1987-05-20 Dispositif de combustion des particules solides contenues dans les gaz d'échappement des moteurs à combustion interne Expired EP0252257B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863621913 DE3621913A1 (de) 1986-06-30 1986-06-30 Vorrichtung zum verbrennen von feststoffteilchen im abgas von brennkraftmaschinen
DE3621913 1986-06-30

Publications (2)

Publication Number Publication Date
EP0252257A1 true EP0252257A1 (fr) 1988-01-13
EP0252257B1 EP0252257B1 (fr) 1989-08-09

Family

ID=6304051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107312A Expired EP0252257B1 (fr) 1986-06-30 1987-05-20 Dispositif de combustion des particules solides contenues dans les gaz d'échappement des moteurs à combustion interne

Country Status (4)

Country Link
US (1) US4731994A (fr)
EP (1) EP0252257B1 (fr)
JP (1) JPS639614A (fr)
DE (2) DE3621913A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989001088A1 (fr) * 1987-08-03 1989-02-09 Jovan Matijas Procede et dispositif pour separer des particules de suie et purifier des gaz d'echappement provenant d'un moteur a combustion interne
EP0380806A1 (fr) * 1989-02-02 1990-08-08 Robert Bosch Gmbh Brûleur d'allumage pour un dispositif de combustion des particules solides dans les gaz d'échappement d'un moteur à combustion interne
WO1994023186A1 (fr) * 1993-03-30 1994-10-13 Denox S.R.L. Systeme d'echappement servant a limiter les polluants de gaz d'echappement de moteurs a combustion interne

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922019A1 (de) * 1988-09-05 1990-04-05 Richter Gerhard Vorrichtung zum verbrennen der kontaminierten russpartikel in den abgasen von dieselmotoren
DE3837472C2 (de) * 1988-11-04 1998-09-24 Deutz Ag Partikelfiltersystem
DE4120702A1 (de) * 1991-06-22 1992-12-24 Man Technologie Gmbh Brenner fuer die regenerierung von partikelfiltern
DE4242094B4 (de) * 1992-12-14 2004-09-02 Deutz Ag Regenerationsbrenner mit einstückiger Ausbildung von dessen Ventilgehäuse und Brennkammer
US5771683A (en) * 1995-08-30 1998-06-30 Southwest Research Institute Active porous medium aftertreatment control system
TW500622B (en) * 2000-12-04 2002-09-01 Taeyang Tech Co Ltd Gas scrubber system
DE102006015841B3 (de) * 2006-04-03 2007-08-02 TWK Engineering Entwicklungstechnik (GbR) (vertretungsberechtigte Gesellschafter Herrn Thomas Winter, Jagdhaus am Breitenberg, 56244 Ötzingen und Herrn Waldemar Karsten, Am Merzenborn 6, 56422 Wirges) Verfahren zur Erzeugung von Heißgas

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1934596A (en) * 1932-07-05 1933-11-07 Livius V Fogas Gas destroyer
DE2031278A1 (de) * 1969-06-25 1971-01-14 Appca, Ine , Springfield Va (VStA) Anordnung zur Steuerung der Emission eines Verbrennungsmotors
DE2031299A1 (de) * 1969-06-25 1971-01-14 Appca, Ine , Springfield, Va (VStA) Anordnung zur Steuerung der Emission eines Verbrennungsmotors
US4318887A (en) * 1979-11-02 1982-03-09 Leistritz Hans Karl Heat exchange afterburner and muffler apparatus for engine exhaust gases
DE3526074A1 (de) * 1985-07-20 1987-01-22 Bosch Gmbh Robert Einrichtung zur entfernung von brennbaren festkoerperteilchen aus abgasen von brennkraftmaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE328305B (fr) * 1964-07-10 1970-09-14 A Aronsohn
DE2606333A1 (de) * 1976-02-18 1977-08-25 Leistritz Hans Karl Turbulenzzone bei luftinjektoren
DE2900318A1 (de) * 1979-01-05 1980-07-17 Leistritz Hans Karl Fertigungsverfahren einer nachbrenner-kompaktanlage
DE3424196A1 (de) * 1984-02-11 1985-08-22 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur entfernung von festkoerperteilen aus abgasen von brennkraftmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1934596A (en) * 1932-07-05 1933-11-07 Livius V Fogas Gas destroyer
DE2031278A1 (de) * 1969-06-25 1971-01-14 Appca, Ine , Springfield Va (VStA) Anordnung zur Steuerung der Emission eines Verbrennungsmotors
DE2031299A1 (de) * 1969-06-25 1971-01-14 Appca, Ine , Springfield, Va (VStA) Anordnung zur Steuerung der Emission eines Verbrennungsmotors
US4318887A (en) * 1979-11-02 1982-03-09 Leistritz Hans Karl Heat exchange afterburner and muffler apparatus for engine exhaust gases
DE3526074A1 (de) * 1985-07-20 1987-01-22 Bosch Gmbh Robert Einrichtung zur entfernung von brennbaren festkoerperteilchen aus abgasen von brennkraftmaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989001088A1 (fr) * 1987-08-03 1989-02-09 Jovan Matijas Procede et dispositif pour separer des particules de suie et purifier des gaz d'echappement provenant d'un moteur a combustion interne
EP0380806A1 (fr) * 1989-02-02 1990-08-08 Robert Bosch Gmbh Brûleur d'allumage pour un dispositif de combustion des particules solides dans les gaz d'échappement d'un moteur à combustion interne
WO1994023186A1 (fr) * 1993-03-30 1994-10-13 Denox S.R.L. Systeme d'echappement servant a limiter les polluants de gaz d'echappement de moteurs a combustion interne

Also Published As

Publication number Publication date
DE3621913A1 (de) 1988-01-07
EP0252257B1 (fr) 1989-08-09
DE3760427D1 (en) 1989-09-14
US4731994A (en) 1988-03-22
JPS639614A (ja) 1988-01-16

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