EP0484955B1 - Procédé et dispositif pour le traîtement des mélanges humides de gaz et de poussières - Google Patents

Procédé et dispositif pour le traîtement des mélanges humides de gaz et de poussières Download PDF

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Publication number
EP0484955B1
EP0484955B1 EP91119030A EP91119030A EP0484955B1 EP 0484955 B1 EP0484955 B1 EP 0484955B1 EP 91119030 A EP91119030 A EP 91119030A EP 91119030 A EP91119030 A EP 91119030A EP 0484955 B1 EP0484955 B1 EP 0484955B1
Authority
EP
European Patent Office
Prior art keywords
gas
dust
inert gas
heated
flue 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.)
Expired - Lifetime
Application number
EP91119030A
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German (de)
English (en)
Other versions
EP0484955A2 (fr
EP0484955A3 (en
Inventor
Klaus Kasseck
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.)
Loesche GmbH
Original Assignee
Loesche 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 Loesche GmbH filed Critical Loesche GmbH
Publication of EP0484955A2 publication Critical patent/EP0484955A2/fr
Publication of EP0484955A3 publication Critical patent/EP0484955A3/de
Application granted granted Critical
Publication of EP0484955B1 publication Critical patent/EP0484955B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F23K1/04—Heating fuel prior to delivery to combustion apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00—Feeding arrangements
    • F23K2203/10—Supply line fittings
    • F23K2203/102—Flashback safety, e.g. inertizing devices

Definitions

  • the invention relates to a method and a device for the treatment of moist, explosive gas-dust mixtures, in particular coal dust mixtures in grinding drying plants.
  • coal dust Since there are often different capacities in the grinding process in the mills and in the eventual combustion of the coal dust mixture, the coal dust is then discharged to the dust separator from the grinding and drying system and temporarily stored in silos or storage bunkers.
  • the object of the invention is therefore to create a method and an economical device of the type mentioned at the beginning, by means of which improvements in the subsequent fluid transport and the greatest possible freedom from maintenance of the systems used can be achieved in the case of explosion-critical gas-dust mixtures of materials .
  • This object is achieved according to the invention by using a preheated or heated inert gas to a temperature higher than the dew point temperature of the residual moisture of the dust mixture.
  • This solution avoids the very serious problem of condensation of the residual moisture present in the coal dust and thus ultimately agglomeration of the dust particles.
  • the heating is expediently carried out to about 30 ° C. above the dew point temperature in order to reliably preclude the condensation.
  • Nitrogen gas (N2) or carbon dioxide (CO2) can preferably be used as inert gases.
  • CO2 gas inert gases.
  • An alternative or additional option for better fluidization of the coal dust can be achieved by means of gassing cushions or boxes or also mushroom-shaped nozzles for the inflow of inert gas in the area of the storage bunker outlet.
  • the measures of the process can be used in both externally inerted and self-inert grinding drying systems. Since hot-gas generators in the sense of smoke-gas generators are generally present in these mill-drying systems, the heating or heating of the inert gas can take place directly or directly coupled with these hot-gas generators.
  • inert gas heating is the installation of coiled tubing in the casing or lining of the burner chamber.
  • the heating of the inert gas can also be carried out in a separate heat exchanger which is provided directly in the flue gas flow.
  • Another option is to install coils for the inert gas after the burner chamber, parallel to the flue gas duct, so to speak.
  • the inert gas heated in this way can therefore at the appropriate points, z. B. the storage bunker inertization or the inertization for the coal dust transport to the storage bunkers etc.
  • the inert gas pipe system can be switched to an air flow, so that scaling of the pipe system is prevented.
  • the schematic section according to FIG. 1 shows a flue gas generator 2, in which the interior designed as a burner chamber is fired via a burner 3.
  • the burner chamber is surrounded by a refractory lining 6, in which the burner flame 5 is indicated schematically.
  • a coiled tube 7 is provided in the longitudinal direction of the lining 6 in the left region of the thicker lining 6. This coiled tubing 7 is connected to an inlet line 8 and an outlet line 9 for the inert gas to be heated.
  • Cold inert gas is usually supplied via appropriate valves via the inlet line 8, and an air supply, in particular for emergency situations, is also possible.
  • the Outlet line 9 is connected to a corresponding distribution system for storage bunkers or the transport lines.
  • FIG. 2 an alternative for an economical heating of the inert gas with a somewhat modified smoke gas generator 12 is shown.
  • the burner 3 and the lining 6 open to the right are shown with the same reference number.
  • the flame 5 is indicated within the burner chamber.
  • the hot process gas flow 22 arises from the fact that the housing jacket 14 is provided at a short distance from the outer wall of the lining, so that flow channels are formed around the combustion chamber here. Process gas for heating is blown or sucked in via the inlet opening 15 by blowers or by the thermal differences, which flows in the front right-hand region as process or hot gas flow 22 through the mill drying system.
  • FIG. 2 shows the arrangement of a pipe coil 7 for the inert gas adjacent to the right-hand end of the brick lining 6, so that this pipe coil 7 still comes to rest in the area of the flame 5 of the burner 3.
  • FIG. 2 Another alternative is shown in the right part of FIG. 2, where a heat exchanger 21 is installed directly in the process gas flow 22.
  • the initially cold inert gas is passed through the coiled tubing 7 and the heat exchanger 21. B. is heated to a temperature of 50 to 90 o C, but in any case above the dew point temperature of the gas-coal dust mixture.
  • the invention provides an excellent possibility of avoiding condensation of the residual moisture even after the coal dust has been discharged for intermediate storage or the like, which ultimately leads to a considerable reduction in the susceptibility to failure of the entire system or the mill drying system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Drying Of Solid Materials (AREA)
  • Disintegrating Or Milling (AREA)

Claims (6)

  1. Procédé de traitement de mélanges humides explosifs de gaz et de poussière, en particulier de mélanges contenant de la poussière de charbon, dans des installations de broyage-séchage lors du transport des fluides et lors de l'entrepot de la poussière obtenue, lequel procédé utilise un gaz de fumée, en particulier un gaz de procédé chaud, et un gaz inerte, la circulation du gaz de fumée étant utilisé comme véhicule de chauffage et de transport du mélange de poussière humide à travers le broyeur, les conduits et les récupérateurs de poussière, et le gaz inerte étant utilisé seul ou en complément du gaz de fumée lors du transport ultérieur et/ou lors de l'entrepôt de la poussière, caractérisé en ce que le gaz inerte est chauffé à une température supérieure au point de rosée de l'humidité résiduelle contenue dans le mélange de poussière.
  2. Procédé conforme à la revendication 1, caractérisé en ce que le gaz inerte est chauffé à une température supérieure d'environ 30°C à la température du point de rosée.
  3. Procédé conforme à la revendication 1 ou 2, caractérisé en ce que, dans les lieux de stokkage, on effectue une insufflation de gaz inerte chauffé, en particulier du CO₂, également au niveau des parois latérales internes.
  4. Procédé conforme à une des revendications 1 à 3, caractérisé en ce que l'on utilise le gaz inerte chauffé lors du transport ultérieure et/ou lors de l'entrepôt avec un flux volumique qui permet d'éviter la condensation de l'humidité résiduelle contenue dans la poussière ou dans le mélange contenant la poussière.
  5. Procédé conforme à une des revendications 1 à 4, caractérisé en ce que la chauffage du gaz inerte se fait directement ou indirectement au niveau de la formation du gaz de fumée, en particulier au niveau de la formation du gaz de procédé chaud.
  6. Installation pour le traitement de mélanges humides explosifs de gaz et de poussière selon le procédé conforme à une des revendications 1 à 5, caractérisé en ce qu'un brûleur (3) pour le chauffage du gaz inerte est muni d'une enveloppe (6), en particulier d'un garnissage, une hélice (7,21) en matériau thermorésistant étant prévue dans ou après l'enveloppe (6), en particulier le garnissage du brûleur (2,12), et/ou dans la circulation du gaz de fumée (22), pour le chauffage du gaz inerte circulant.
EP91119030A 1990-11-09 1991-11-07 Procédé et dispositif pour le traîtement des mélanges humides de gaz et de poussières Expired - Lifetime EP0484955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4035730A DE4035730C2 (de) 1990-11-09 1990-11-09 Verfahren und Vorrichtung zur Behandlung von feuchten Gas-Staub-Gemischen
DE4035730 1990-11-09

Publications (3)

Publication Number Publication Date
EP0484955A2 EP0484955A2 (fr) 1992-05-13
EP0484955A3 EP0484955A3 (en) 1992-12-09
EP0484955B1 true EP0484955B1 (fr) 1995-02-01

Family

ID=6417972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119030A Expired - Lifetime EP0484955B1 (fr) 1990-11-09 1991-11-07 Procédé et dispositif pour le traîtement des mélanges humides de gaz et de poussières

Country Status (5)

Country Link
US (1) US5315940A (fr)
EP (1) EP0484955B1 (fr)
JP (1) JPH0811200B2 (fr)
DE (2) DE4035730C2 (fr)
ZA (1) ZA918763B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280257B (en) * 1993-07-20 1996-09-25 Ambi Rad Ltd Space heating appliances
CN102502264A (zh) * 2011-09-28 2012-06-20 张家港市锦明机械有限公司 流化装置
US11519601B2 (en) * 2020-03-10 2022-12-06 General Electric Company System and method for inerting a biomass feed assembly
KR102409908B1 (ko) * 2021-07-20 2022-06-22 주식회사 그린테크 폐유의 완전연소가 가능한 연소버너장치

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
US2777407A (en) * 1951-10-02 1957-01-15 Babcock & Wilcox Co Fuel burning apparatus
US3319346A (en) * 1964-09-29 1967-05-16 John E Schuster Method and apparatus for heat treating moisture bearing particles
US3589315A (en) * 1969-09-11 1971-06-29 Bank Of California Apparatus for igniting and burning air-borne particulate combustible material
US3854666A (en) * 1973-01-29 1974-12-17 Gilbert Associates Process for pulverizing coal to ultrafine size
DE2651849B2 (de) * 1976-11-13 1979-09-20 Messer Griesheim Gmbh, 6000 Frankfurt Erhitzer zum Verdampfen großer Mengen tiefsiedener verflüssigter Gase
US4162890A (en) * 1977-05-02 1979-07-31 Bloom Engineering Company, Inc. Combustion apparatus
SU985590A1 (ru) * 1978-03-27 1982-12-30 За витель С.В.Чуевский I : С-СШ31АЗ Система приготовлени угольной пыли
DE2942726A1 (de) * 1979-10-23 1981-05-07 Krupp-Koppers Gmbh, 4300 Essen Brenner fuer gasfoermige oder fluessige brennstoffe
SU850992A1 (ru) * 1979-11-06 1981-07-30 Предприятие П/Я А-3513 Пылесистема
US4551090A (en) * 1980-08-25 1985-11-05 L. & C. Steinmuller Gmbh Burner
US4509272A (en) * 1981-03-20 1985-04-09 Graeff Roderich Wilhelm Method and apparatus for drying moist exhaust air from one or more bulk material drying hoppers
US4373451A (en) * 1981-04-06 1983-02-15 Kennedy Van Saun Corporation Apparatus and method for feeding pulverized solid fuel to a burner
JPS62116820A (ja) * 1985-11-14 1987-05-28 Sumitomo Metal Ind Ltd 高炉吹き込み用微粉炭の乾燥方法
DE3545828A1 (de) * 1985-12-23 1987-07-02 Jackering Altenburger Masch Verfahren und einrichtung zum betrieb einer mahlanlage
US4767762A (en) * 1985-12-23 1988-08-30 Abbott Laboratories Tricyclic quinoline and naphthyride antibacterials
AT385836B (de) * 1986-11-20 1988-05-25 Simmering Graz Pauker Ag Verfahren und vorrichtung zur trocknung und inertisierung von brennstoffen und brennbaren mahlmaterialien mittels rauchgas in muehlen
DE3734359A1 (de) * 1987-10-10 1989-04-20 Rheinische Braunkohlenw Ag Verfahren zur erzeugung von braunkohlenstaub
US4858538A (en) * 1988-06-16 1989-08-22 Shell Oil Company Partial combustion burner
JPH0729068B2 (ja) * 1988-08-01 1995-04-05 石川島播磨重工業株式会社 予備粉砕ミル排ガスの結露防止装置

Also Published As

Publication number Publication date
DE59104484D1 (de) 1995-03-16
DE4035730A1 (de) 1992-05-14
EP0484955A2 (fr) 1992-05-13
ZA918763B (en) 1992-07-29
US5315940A (en) 1994-05-31
DE4035730C2 (de) 1993-10-14
EP0484955A3 (en) 1992-12-09
JPH0686947A (ja) 1994-03-29
JPH0811200B2 (ja) 1996-02-07

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