EP0484955A2 - 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 PDFInfo
- Publication number
- EP0484955A2 EP0484955A2 EP91119030A EP91119030A EP0484955A2 EP 0484955 A2 EP0484955 A2 EP 0484955A2 EP 91119030 A EP91119030 A EP 91119030A EP 91119030 A EP91119030 A EP 91119030A EP 0484955 A2 EP0484955 A2 EP 0484955A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- dust
- inert gas
- flue gas
- heating
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 239000000428 dust Substances 0.000 title claims abstract description 25
- 239000011261 inert gas Substances 0.000 claims abstract description 33
- 239000002817 coal dust Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000009833 condensation Methods 0.000 claims abstract description 11
- 230000005494 condensation Effects 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000012432 intermediate storage Methods 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 13
- 239000002360 explosive Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000006163 transport media Substances 0.000 claims description 2
- 239000003779 heat-resistant material Substances 0.000 claims 1
- 241000273930 Brevoortia tyrannus Species 0.000 description 10
- 239000003245 coal Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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 can be used as inert gases.
- An alternative or additional possibility 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.
- tubular fronds in the casing or lining of the burner chamber is an option.
- 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.
- tube fronds for the inert gas after the burner chamber, so to speak parallel to the flue gas duct.
- the inert gas heated in this way can therefore at the appropriate points, z. B. the storage bunker inerting or the inertization for the coal dust transport to the storage bunkers etc.
- the inert gas pipe system can be switched over 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 tubular frond 7 is provided in the longitudinal direction of the lining 6 in the left region of the thicker lining 6. This frond 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 the inlet line 8 via corresponding valves, 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 area as process or hot gas flow 22 through the mill drying system.
- FIG. 2 shows the arrangement of a pipe frond 7 for the inert gas adjacent to the right-hand end of the brick lining 6, so that this pipe frond 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 tube frond 7 or 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)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Disintegrating Or Milling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4035730 | 1990-11-09 | ||
DE4035730A DE4035730C2 (de) | 1990-11-09 | 1990-11-09 | Verfahren und Vorrichtung zur Behandlung von feuchten Gas-Staub-Gemischen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0484955A2 true EP0484955A2 (fr) | 1992-05-13 |
EP0484955A3 EP0484955A3 (en) | 1992-12-09 |
EP0484955B1 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)
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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU850992A1 (ru) * | 1979-11-06 | 1981-07-30 | Предприятие П/Я А-3513 | Пылесистема |
SU985590A1 (ru) * | 1978-03-27 | 1982-12-30 | За витель С.В.Чуевский I : С-СШ31АЗ | Система приготовлени угольной пыли |
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 |
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 |
Family Cites Families (14)
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 |
DE2942726A1 (de) * | 1979-10-23 | 1981-05-07 | Krupp-Koppers Gmbh, 4300 Essen | Brenner fuer gasfoermige oder fluessige brennstoffe |
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 |
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 |
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 |
-
1990
- 1990-11-09 DE DE4035730A patent/DE4035730C2/de not_active Expired - Fee Related
-
1991
- 1991-11-05 ZA ZA918763A patent/ZA918763B/xx unknown
- 1991-11-07 DE DE59104484T patent/DE59104484D1/de not_active Expired - Fee Related
- 1991-11-07 EP EP91119030A patent/EP0484955B1/fr not_active Expired - Lifetime
- 1991-11-08 JP JP3321256A patent/JPH0811200B2/ja not_active Expired - Lifetime
- 1991-11-08 US US07/789,263 patent/US5315940A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU985590A1 (ru) * | 1978-03-27 | 1982-12-30 | За витель С.В.Чуевский I : С-СШ31АЗ | Система приготовлени угольной пыли |
SU850992A1 (ru) * | 1979-11-06 | 1981-07-30 | Предприятие П/Я А-3513 | Пылесистема |
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 |
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 |
Non-Patent Citations (4)
Title |
---|
B.W.K. BRENNSTOFF WäRME KRAFT Bd. 36, Nr. 5, Mai 1984, WüRZBURG Seiten 217 - 222 RENNERT 'Kohlenstaubzündfeuerung: Anwendun g,Betriebsergebnisse,Wirtschaftlichkeit' * |
DATABASE WPIL Section Ch, Week 8727, Derwent Publications Ltd., London, GB; Class H09, AN 87188179 & JP-A-62 116 820 (SUMITOMO) 28. Mai 1987 * |
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week F21, Derwent Publications Ltd., London, GB; Class Q, AN G2006 & SU-A-850 992 (BURGVITS) * |
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week K45, Derwent Publications Ltd., London, GB; Class Q, AN 83-812733 & SU-A-985 590 (CHUEVSKII) * |
Also Published As
Publication number | Publication date |
---|---|
EP0484955B1 (fr) | 1995-02-01 |
DE4035730A1 (de) | 1992-05-14 |
EP0484955A3 (en) | 1992-12-09 |
JPH0811200B2 (ja) | 1996-02-07 |
ZA918763B (en) | 1992-07-29 |
US5315940A (en) | 1994-05-31 |
DE59104484D1 (de) | 1995-03-16 |
JPH0686947A (ja) | 1994-03-29 |
DE4035730C2 (de) | 1993-10-14 |
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