EP0140075A2 - Chargement de poussière dans une zone chaude - Google Patents

Chargement de poussière dans une zone chaude Download PDF

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Publication number
EP0140075A2
EP0140075A2 EP84110743A EP84110743A EP0140075A2 EP 0140075 A2 EP0140075 A2 EP 0140075A2 EP 84110743 A EP84110743 A EP 84110743A EP 84110743 A EP84110743 A EP 84110743A EP 0140075 A2 EP0140075 A2 EP 0140075A2
Authority
EP
European Patent Office
Prior art keywords
dust
distributor head
compressed air
entry according
outlet openings
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
EP84110743A
Other languages
German (de)
English (en)
Other versions
EP0140075A3 (en
EP0140075B1 (fr
Inventor
Hans Lüttger
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.)
Ruhrkohle-Carborat GmbH
Original Assignee
Ruhrkohle-Carborat 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 Ruhrkohle-Carborat GmbH filed Critical Ruhrkohle-Carborat GmbH
Priority to AT84110743T priority Critical patent/ATE31360T1/de
Publication of EP0140075A2 publication Critical patent/EP0140075A2/fr
Publication of EP0140075A3 publication Critical patent/EP0140075A3/de
Application granted granted Critical
Publication of EP0140075B1 publication Critical patent/EP0140075B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast

Definitions

  • the invention relates to dust in a hot zone, in particular coal dust burners for hot water or steam boilers or hot gas generators with a dust metering.
  • Dust furnaces are generally suitable for all types of coal and various other types of fuel dust. Dust furnaces with a thermal output of up to 2,500 MW are built. Several single burners are interconnected in the large units. The lower limit for the use of dust furnaces is usually given as 60 MW. This limit is essentially economic. An expansion to the areas up to 1 MW is considered possible.
  • coal dust burner Possible uses of the coal dust burner range from the ceramic industry (tunnel furnaces), the metal industry (melting furnaces), to hot gas generators for drying systems, hot air generators, cement rotary kilns, lime rotary and lime shaft furnaces, gypsum systems and boiler systems.
  • All dust burners require a burner. Coal and air are introduced and mixed into the combustion chamber through the burner. Good mixing is an essential prerequisite for fast ignition, stable flame formation and good burnout.
  • the stable ignition of the dust requires the individual coal grain or dust grain to be heated from the burner outlet to the ignition temperature. Heating takes place mainly by mixing primary air and fuel with hot flame gas. In addition, there is also heating by radiation.
  • the flame lengths vary from less than 1 m for small burners to approximately 10 m for rotary kilns.
  • the object of the invention is therefore to create a trouble-free metering device.
  • this is achieved in that the Brennstaubdo - tion by means of adjustable metering screw from a small bunker withdrawal takes place.
  • the escaping material is fed to a non-controllable rotary valve.
  • Under the cellular wheel sluice there is a nozzle conveyor with a downstream distributor head that has at least two outlet openings.
  • the nozzle conveyor picks up the escaping fuel dust in a known manner.
  • the fuel dust is distributed evenly in the compressed air of the nozzle conveyor, so that a distribution of the compressed air flow in the downstream distributor head results in a corresponding distribution of the fuel dust quantity to the outlet openings of the distributor head.
  • the fuel dust is then fed to the burner in various compressed air flows from the distributor head.
  • the various fuel dust / compressed air flows advantageously open up the possibility of entering the fuel dust at several points in the burner instead of in a single flow at a single point.
  • the ignition and flame behavior of the burner can thus be advantageously influenced over a wide range by the arrangement of the entry openings.
  • the distributor head opens up a simple option for loading all of the inlet openings provided on the furnace. The entry is made on the blast furnace via the blow mold, d. H. the distributor head enables simple and advantageous distribution of the fuel dust onto the blow mold.
  • the distributor head has a maximum of 20 outlet openings.
  • at least one further distributor head is connected downstream of a first distributor head. At least two distributor heads are preferably connected downstream, from which the same fuel dust / compressed air streams can be drawn off.
  • the outlet openings run parallel to the inlet flow axis of the distributor head and are provided with an adjustable valve cone. With the help of the valve cone, the opening width of each outlet opening can be changed and the volume flow escaping through the outlet opening can be regulated.
  • outlet openings which are arranged distributed over a circular circumference around the inlet flow opening.
  • a flow body in the middle between the outlet openings e.g. B. in the form of a cone, which contributes to the distribution of the incoming fuel / compressed air mixture.
  • valve cone according to the invention as injectors is also particularly advantageous. Compressed air and / or even additional fuel dust can be metered in via these injectors, so that with the help of the injectors an individual influencing or additional controllability of the individual outlet flows is given to the distributor head.
  • the adjustable valve cones are optionally realized with an arrangement in the distributor housing which can be displaced in the longitudinal direction and an actuating device. From the valve cones, injectors are created by making openings and applying compressed air and / or fuel dust.
  • the distributor head is formed in several parts.
  • the fuel dust / compressed air mixture carried by the nozzle conveyor slows down.
  • the cross section of the fuel dust / compressed air flow increases, so that all the nozzles 4 arranged in the discharge part 3 are evenly charged with fuel dust / compressed air.
  • only two of a plurality of nozzles 4 arranged in a uniformly distributed manner are shown.
  • the nozzles 4 form the discharge openings of the distributor head.
  • the nozzles 4 are screwed into the discharge part 3.
  • Lines 5 are connected to the nozzles 4 and feed the escaping fuel dust / compressed air mixture to the desired intended use.
  • the distributor head has a substantially cylindrical shape. It consists of an entry part 6 and a discharge part 7. Both parts 6 and 7 are connected to one another like parts 1 and 3 according to FIG. 1.
  • the entry part 6 is provided with a conical inlet connection 8, to which the feed line 12 of the nozzle conveyor is connected.
  • the discharge part 7 has a centrally arranged flow body in the form of a cone 9. Around the cone 9 are on a Circumference of outlet openings arranged, which in turn are formed by nozzles 10.
  • the nozzles 10 are arranged evenly distributed and - like the nozzles 4 in the discharge part 3 of FIG. 1 - screwed into the discharge part 7. Lines 5 are also connected to the nozzles 10, as shown in FIG. 1, which feed the escaping fuel dust / compressed air mixture to the desired use.
  • valve cones 11 interact with the nozzles 10.
  • the valve cone 11 are slidably arranged in the inlet part 6, in a parallel arrangement to the longitudinal axis 12 of the distributor head.
  • glands 13 ensure adequate sealing.
  • the valve cones 11 are formed in several parts and consist of a tip with a passage opening 14 as well as an adjusting device and a fuel dust and / or compressed air supply.
  • the passage opening 14 is multi-stage, i. that is, it is drilled out as much as possible to keep flow resistances to a minimum. Drilling is done in stages.
  • a sleeve 15 is screwed to the valve cone 11, which is closed at the end facing away from the valve cone 11 and has a sheet 16 and a handle 17 for manual adjustment.
  • the sheet 16 has an elongated hole 18 in which the hexagon screw shown sits.
  • the screw is screwed into a ring 19 and serves to lock the sheet 16 in the desired position.
  • the ring 19 is attached to the tube 12.
  • a tube 20 is welded to the sleeve 15 and serves with a rod 21 on the one hand as a guide and on the other hand as a compressed air / fuel dust supply and / or measuring device.
  • the rod 21 is arranged displaceably in the distributor head.
  • a manometer 22 is connected to the tube 20 for measurement.
  • the air pressure upstream of the valve plug 11 is measured with the pressure gauge 22.
  • the compressed air feed is preferably done via a non Darge - turned conduit which is connected to the pipe 20 at the 23rd
  • the diameters of the nozzles 4 and 10 are each selected such that a certain negative pressure arises above the nozzle conveyor depending on the material to be transported and the distance from the fuel dust container to the point of use to be bridged by the nozzle conveyor. This preferably applies to the use of the dosing device in coal dust burners.
  • valve cone 11 When using a distributor head according to FIG. 2, the valve cone 11 is set so that overpressure is displayed on the pressure gauge 22.
  • the speeds in the nozzle conveyor are 10 - 24 m / sec, especially for use with coal dust burners.
  • the conveying distance in the exemplary embodiments according to FIGS. 1 and 2 is a maximum of 50 m, the conveying capacity is a maximum of 5 t of fuel dust per hour.
  • the number of injector nozzles is at least 3 and a maximum of 20 per distributor head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP84110743A 1983-10-19 1984-09-08 Chargement de poussière dans une zone chaude Expired EP0140075B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84110743T ATE31360T1 (de) 1983-10-19 1984-09-08 Staubeintrag in eine heisse zone.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833337972 DE3337972A1 (de) 1983-10-19 1983-10-19 Kohlenstaubbrenner
DE3337972 1983-10-19

Publications (3)

Publication Number Publication Date
EP0140075A2 true EP0140075A2 (fr) 1985-05-08
EP0140075A3 EP0140075A3 (en) 1985-09-25
EP0140075B1 EP0140075B1 (fr) 1987-12-09

Family

ID=6212214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110743A Expired EP0140075B1 (fr) 1983-10-19 1984-09-08 Chargement de poussière dans une zone chaude

Country Status (3)

Country Link
EP (1) EP0140075B1 (fr)
AT (1) ATE31360T1 (fr)
DE (2) DE3337972A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211295A1 (fr) * 1985-08-05 1987-02-25 Paul Wurth S.A. Procédé et dispositif d'injection, par voie pneumatique, de quantités dosées de matières pulvérulentes dans une enceinte se trouvant sous pression variable
DE3612682A1 (de) * 1986-04-15 1987-10-22 Krupp Polysius Ag Brennereinrichtung
WO2012034573A1 (fr) * 2010-09-16 2012-03-22 Loesche Gmbh Générateur de gaz chaud chauffé par des matières solides, ayant une plage de régulation élargie

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR648588A (fr) * 1927-02-15 1928-12-11 Procédé et dispositif pour répartir le combustible pulvérisé dans deux ou plusieurs conduits
DE562321C (de) * 1930-07-10 1932-10-24 Andre Labat Camy Vorrichtung zum Zuteilen von staubfoermigem Gut an ein es durch eine Foerderleitung weiterfuehrendes Foerdergas
US1943376A (en) * 1931-06-04 1934-01-16 Dilling Harvey Newell Stoker for pulverized fuel
FR790009A (fr) * 1935-05-06 1935-11-12 Iron Fireman Mfg Co Chargeur automatique pour chaudières
DE1128808B (de) * 1957-11-21 1962-04-26 Simon Ltd Henry Pneumatische Foerderanlage
GB1310886A (en) * 1969-11-25 1973-03-21 Coal Industry Patents Ltd Apparatus for distributing particulate material
US4250816A (en) * 1976-12-16 1981-02-17 Pullman Incorporated, Pullman Swindell Division Particulate solid fuel combustion system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR648588A (fr) * 1927-02-15 1928-12-11 Procédé et dispositif pour répartir le combustible pulvérisé dans deux ou plusieurs conduits
DE562321C (de) * 1930-07-10 1932-10-24 Andre Labat Camy Vorrichtung zum Zuteilen von staubfoermigem Gut an ein es durch eine Foerderleitung weiterfuehrendes Foerdergas
US1943376A (en) * 1931-06-04 1934-01-16 Dilling Harvey Newell Stoker for pulverized fuel
FR790009A (fr) * 1935-05-06 1935-11-12 Iron Fireman Mfg Co Chargeur automatique pour chaudières
DE1128808B (de) * 1957-11-21 1962-04-26 Simon Ltd Henry Pneumatische Foerderanlage
GB1310886A (en) * 1969-11-25 1973-03-21 Coal Industry Patents Ltd Apparatus for distributing particulate material
US4250816A (en) * 1976-12-16 1981-02-17 Pullman Incorporated, Pullman Swindell Division Particulate solid fuel combustion system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211295A1 (fr) * 1985-08-05 1987-02-25 Paul Wurth S.A. Procédé et dispositif d'injection, par voie pneumatique, de quantités dosées de matières pulvérulentes dans une enceinte se trouvant sous pression variable
DE3612682A1 (de) * 1986-04-15 1987-10-22 Krupp Polysius Ag Brennereinrichtung
WO2012034573A1 (fr) * 2010-09-16 2012-03-22 Loesche Gmbh Générateur de gaz chaud chauffé par des matières solides, ayant une plage de régulation élargie

Also Published As

Publication number Publication date
DE3468070D1 (en) 1988-01-21
ATE31360T1 (de) 1987-12-15
DE3337972A1 (de) 1985-05-09
EP0140075A3 (en) 1985-09-25
EP0140075B1 (fr) 1987-12-09

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