EP0023455B1 - Verfahren und Anlage zum Trocknen und/oder Vorerhitzen zu verkokender Kohle - Google Patents

Verfahren und Anlage zum Trocknen und/oder Vorerhitzen zu verkokender Kohle Download PDF

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Publication number
EP0023455B1
EP0023455B1 EP80401095A EP80401095A EP0023455B1 EP 0023455 B1 EP0023455 B1 EP 0023455B1 EP 80401095 A EP80401095 A EP 80401095A EP 80401095 A EP80401095 A EP 80401095A EP 0023455 B1 EP0023455 B1 EP 0023455B1
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EP
European Patent Office
Prior art keywords
heat
drying
exchanger
preheating
smoke
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
Application number
EP80401095A
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English (en)
French (fr)
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EP0023455A1 (de
Inventor
Roger Puff
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Charbonnages de France CDF
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Charbonnages de France CDF
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Publication of EP0023455A1 publication Critical patent/EP0023455A1/de
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00—Cooling or quenching coke
    • C10B39/02—Dry cooling outside the oven

Definitions

  • the invention relates to a process for drying and / or preheating by entrainment and / or fluidization of coking coal by means of a neutral coolant or reducing gas partially recycled and maintained at an appropriate temperature of 250 to 650 ° C. , in which the coal to be dried and / or preheated is introduced into a drying and / or preheating chamber by means of an introduction device with known and / or adjustable flow rate.
  • the invention also relates to an installation for implementing the method.
  • the main object of the invention is to achieve a simplified process and installation allowing good regulation of the temperature of the heat transfer gas and eliminating all the difficulties due to the corrosion caused by water vapor in known installations.
  • a secondary object of the invention is to provide a method and an installation of the above type admitting the installation and the use of means which can be used at the time of start-up in order to avoid any start-up with cold, undried coal.
  • a single closed circuit is used in which the heat transfer gas is enriched in water vapor until it becomes substantially water vapor, while maintaining its temperature at a value greater than 250 ° C by acting on the fraction of extinguishing smoke sent through the heat exchanger.
  • the fraction of the extinguishing fumes used for heating the heat transfer gas and the unused fraction are used for the production of heat by heat exchange, and part of the heat necessary for drying and / or preheating of the coal is provided in addition by a combustion chamber whose caloric flow is controlled by the temperature measured in the drying and / or preheating chamber.
  • the circuit of the coolant gas is a single circuit passing through the exchanger
  • the extinguishing smoke circuit comprises a pipe passing through the exchanger and a bypass pipe with respect to the latter, however, servo valves mounted on at least one of these pipes regulate the fraction of extinguishing fumes passing through the exchanger by the pipe so as to maintain the temperature of the heat transfer gas at a value greater than 250 ° C.
  • the means for introducing the heat-transfer gas into the drying enclosure and / or preheating further comprises a combustion chamber interposed between the outlet pipe of the heat transfer gas from the exchanger and the means for introducing the heat transfer gas into the drying and / or preheating chamber.
  • the combustion chamber comprises means for measuring the temperature
  • the combustion chamber it is advantageous for the combustion chamber to include means for regulating the caloric flow controlled by the means for measuring the temperature in the drying and / or preheating enclosure, or at its outlet, as it is known per se.
  • An installation for the pretreatment of coking coal comprises a preheater mill 1 for grinding and preheating in a fluidized bed.
  • This grinder-preheater 1 comprises a fluidization enclosure 2 inside which rotates a hammer mill 3.
  • the fluidizing and heating gas for the 'fluidization and preheating of the coal is produced in part in a combustion chamber 4 by combustion of gas brought to its burner 5 by a pipe 6 with air forced by a fan 7.
  • the fumes from the prior treatment of the coal are recycled, through a heat exchanger 13 and a pipe 14, into the combustion chamber by a fan 8.
  • the exchanger 13 is of a heat exchange type through a partition wall, for example tubes or a coil, avoiding any communication between the two gas circuits which must exchange heat.
  • the hot gases coming from the heat exchanger 13 and from the combustion chamber 4 are brought, through a venturi 10, to a vertical pipe 9 for pneumatic transport and pre-drying, into which opens, from a conveyor screw 11, the coal stored in a hopper 12.
  • the vertical pipe 9 opens out, it is known per se, in the enclosure 2 for fluidization and grinding and preheating. From the top of the enclosure 2 leaves a pipe 15 for pneumatic transport of the ground coal and preheated by the fluidization gas again acting as a gaseous transport vector.
  • Line 15 brings the carrier gas and the coal transported to a battery of cyclones 16 to the vortex 17 of the last or the last group of which is connected a line 18 serving to collect the gases which are then distributed between an extraction line 19 and a recycling line 20, having a flow measurement throttle 28 and connected to the fan 8.
  • the preheated coal is collected ready to be placed in a coke oven, for which it is brought by an assembly conveyor 22 to a hot coal hopper 23.
  • the main apparatus of which is a dry extinguishing chamber 30, of known type, which comprises a pre-chamber 31, constituting an introductory airlock. coke to be extinguished and which is introduced through an opening 32. From the prechamber 31, the coke descends into the cooling chamber 33 which constitutes a heat exchanger between the hot solid constituted by the coke and neutral or reducing fumes brought to the chamber cooling 33 by a fan 34 and a pipe 35 and evacuated to the thermal use of their sensible heat by a pipe 36. The gases and the vapor released by the coke in the prechamber 31 are extracted by an extraction pipe 37. The refoid cole is extracted at 38.
  • the neutral or reducing fumes are used in a closed circuit from the pipe 36 to the fan 34.
  • a pipe 40 conducts these fumes to the exchange eur 13 through a pipe 41, 42 the flow rate of which is controlled by a valve 43 or a set of valves.
  • a pipe 41, 42 Upstream of the valve 43, .a pipe 41, 42 is looped by a bypass pipe 44 which may include a valve 45 contributing with the valve 43 to regulate the distribution of the hot smoke flow rates between the exchanger 13 and the pipe 44.
  • the pipes 42 and 44 open into a pipe 45 'for supplying to a boiler 46, the outlet from which the extinction fumes, now cold, are brought back to the fan 34 through a dust collector 47 and the pipe 48.
  • the installation of the invention also includes regulation devices.
  • the installation also has a regulation circuit R 1 for the flow of gas to line 6 to control the caloric flow of make-up to the temperature measured in enclosure 2, or at its outlet, by a thermometric probe 24.
  • the flow of recycled heat transfer gas is adjusted at the outlet of the exchanger 13 by valves 25 and / or 26 controlled by the pressure at vortex 17 by a regulation circuit R 3 .
  • the distribution of the flow of hot extinguishing fumes between the exchanger 41 and the bypass 44 is ensured by the valve 43 whose adjustable flow control is controlled by a circuit regulation valve R 4 , at the rate of the coal supply screw 11 for the dryer and / or preheater 1.
  • the quantity of steam produced is 26.1 t / h having as characteristic: 440 ° C, 40 kg / cm 2 .
  • the amount of heat recovered is around 325 therms per tonne of coke, or 240 therms per tonne of dry coal.
  • For a preheating unit at 200 ° C it is estimated that 210 to 240 th / t of coke are required. At 260 ° C it takes about 300 th / t of coke. The heat balance is therefore favorable to the process according to the invention.
  • the smoke flow rate is 90,000 m 3 N / h at a temperature of 750 to 800 ° C.
  • the temperature of 260 ° C can be taken as the set temperature for the temperature probe 24.
  • the preheating temperature will therefore be maintained at 260 ° C with good finesse by automatic action on the gas flow rate to the burner 5 of the combustion chamber 4.
  • the regulation circuit R 2 will accordingly adjust the air flow rate so that the combustion remains stoichiometric.
  • the speed of the gases in the preheating chamber 2 will be kept constant by acting on the flow of neutral fumes recycled into the combustion chamber, by the circuit R 3 , which keeps the pressure drop of the secondary cyclones constant by adjusting the flow recycled smoke.
  • the coal flow rate is set to a constant value, chosen between 1/2 capacity and nominal capacity. If the coal flow rate is voluntarily changed, or if the humidity of the coal is variable, the preheating temperature and the speed of the gases are automatically maintained at their set value as just explained. The handling of the device is therefore extremely flexible.

Claims (10)

1. Verfahren zum Trocknen und/oder Vorerhitzen zu verkokender Kohle in einem geeigneten Raum mit Hilfe eines Wärmeträgergases, dem man die notwendige Wärme zur Rückgewinnung über die Wandung eines Wärmeaustauschers, wenigstens eines Teils der trockenen Rauchlöschgase des heißen, aus dem Ofen ausgetragenen Kokses liefert, dadurch gekennzeichnet, daß man einen einzigen geschlossenen Kreis verwendet, in dem man sich das Wärmeträgergas mit Wasserdampf anreichern läßt, bis im wesentlichen Wasserdampf daraus wird, während man seine Temperatur auf einem Wert oberhalb 250°C hält, indem man auf die Fraktion der Löschrauchgase einwirkt, die gegen den Wärmeaustauscher geführt wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Durchsatz an Löschrauchgasen, die man in den Wärmeaustauscher einführt, dem Durchsatz der Vorrichtung zum Einführen der zu trocknenden und/oder vorzuwärmenden Kohle in den Trocknungs- und/oder Vorwärmraum zugeordnet ist.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Fraktion der zum Erwärmen des Wärmeträgergases verwendeten Rauchgase sowie die nicht verwendete Fraktion zur Erzeugung von Wärme durch Wärmeaustausch verwendet werden.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Teil der zum Trocknen und/oder Vorwärmen der Kohle notwendigen Wärme komplementär durch eine Brennkammer zugeführt wird, deren Wärmedurchsatz der in dem Trocknungs- und/oder Vorwärmeraum gemessenen Temperatur zugeordnet ist.
5. Anlage zum Trocknen und/oder Vorwärmen von zu verkokender Kohle, in Zuordnung zu einer Anlage zum trocknen Löschen des ausgetragenen Kokses, wobei die beiden Anlagen gemeinsam über einen Wärmeaustauscher (13) verfügen, in welchem ein Wärmeträgergas zum Trocknen und/oder Vorwärmen einem vom trockenen Rauchgaslöschkreis unterschiedlichen Kreis folgt, gekennzeichnet durch die Kombination der folgenden Einrichtung: der Kreis des Wärmeträgergases ist ein einziger Kreis, der den Wärmeaustauscher (13) durchsetzt, wobei der Rauchgaslöschkreis eine den Wärmeaustauscher (13) durchsetzende Leitung (41; 42) sowie eine bezüglich des letzteren umgeleitete Leitung aufweist, während Steuerventile (43; 45) an wenigstens einer dieser Leitungen (40; 41; 44) angebracht sind und den Teil der Wärmeaustauscher über die Leitung (41; 42) durchsetzenden Löschgase derart regeln, daß die Temperatur des Wärmeträgergases auf einen Wert oberhalb 250° C gehalten wird.
6. Anlage nach Anspruch 5, dadurch gekennzeichnet, daß die Einführ- und Ausführleitungen (41; 42) der Rauchgase des Wärmeaustauschers (13) über eine Zweig- oder Parallelleitung (44) vereinigt sind, daß ein Satz von Ventilen (43; 45) es ermöglicht, die Löschrauchgasmenge in zwei Fraktionen jeweils zwischen dem Wärmeaustauscher (13) und der Parallelleitung (44) aufzuteilen, daß Einrichtungen (R4) vorgesehen sind, um den Durchsatz der den Wärmeaustauscher durchsetzenden Löschrauchgasfraktion dem Durchsatz der Einrichtung (11) zum Einführen von Kohle in den Raum (2) zuzuordnen.
7. Anlage nach Anspruch 6, dadurch gekennzeichnet, daß die gemeinsame die Ausgangsleitung für die Rauchgase aus dem Wärmeaustauscher und Parallelleitung vereinigende Leitung des Rauchgase zu einem anderen Wärmeverbraucherführt.
8. Anlage nach Anspruch 6, dadurch gekennzeichnet, daß die Einrichtungen (9) zum Einführen von Wärmeträgergas in den Trocknungs-und/oder Vorwärmraum (2) im übrigen über eine Brennkammer (4) verfügen.
9. Anlage nach Anspruch 8, dadurch gekennzeichnet, daß die Brennkammer (4) zwischen die Ausgangsleitung (14) für das Wärmeträgergas des Wärmeaustauschers (13) und die Einrichtung zum Einführen des Wärmeträgergases in die Trocknungs- und/oder Vorwärmkammer zwischengeschaltet ist.
10. Anlage nach Anspruch 8, wobei der Trocknungs- und/oder Vorwärmraum (2) Einrichtungen zum Messen der Temperatur aufweist, dadurch gekennzeichnet, daß die Brennkammer (4) Einrichtungen zum Steuern der Wärmemenge (Ri) aufweist, die den Meßeinrichtungen (24) für die Temperatur im Trocknungs- und/oder Vorwärmraum (2) oder ihrem Ausgang zugeordnet sind, um die letztgenannte Temperatur auf einem Wert oberhalb 250° C zu halten.
EP80401095A 1979-07-30 1980-07-23 Verfahren und Anlage zum Trocknen und/oder Vorerhitzen zu verkokender Kohle Expired EP0023455B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7919531 1979-07-30
FR7919531A FR2462467A1 (fr) 1979-07-30 1979-07-30 Procede et installation de sechage et/ou prechauffage de charbon a cokefier

Publications (2)

Publication Number Publication Date
EP0023455A1 EP0023455A1 (de) 1981-02-04
EP0023455B1 true EP0023455B1 (de) 1983-11-09

Family

ID=9228428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401095A Expired EP0023455B1 (de) 1979-07-30 1980-07-23 Verfahren und Anlage zum Trocknen und/oder Vorerhitzen zu verkokender Kohle

Country Status (11)

Country Link
US (1) US4338160A (de)
EP (1) EP0023455B1 (de)
JP (1) JPS5653183A (de)
AU (1) AU536140B2 (de)
BR (1) BR8004744A (de)
CA (1) CA1161386A (de)
DE (1) DE3065524D1 (de)
ES (1) ES493629A0 (de)
FR (1) FR2462467A1 (de)
RO (1) RO81874A (de)
ZA (1) ZA804256B (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3153091B2 (ja) * 1994-03-10 2001-04-03 株式会社荏原製作所 廃棄物の処理方法及びガス化及び熔融燃焼装置
DE3044989C2 (de) * 1980-11-28 1983-04-21 Didier Engineering Gmbh, 4300 Essen Verfahren zur trockenen Kokskühlung
DE3118931A1 (de) * 1981-05-13 1982-12-02 Krupp-Koppers Gmbh, 4300 Essen Verfahren und vorrichtung zum betrieb einer kokereianlage
US4492042A (en) * 1981-08-28 1985-01-08 Nippon Steel Corporation Method for drying coking coals to be charged in a coke oven
JPH02131134U (de) * 1989-04-01 1990-10-31
US8062410B2 (en) 2004-10-12 2011-11-22 Great River Energy Apparatus and method of enhancing the quality of high-moisture materials and separating and concentrating organic and/or non-organic material contained therein
US8523963B2 (en) 2004-10-12 2013-09-03 Great River Energy Apparatus for heat treatment of particulate materials
US7540384B2 (en) * 2004-10-12 2009-06-02 Great River Energy Apparatus and method of separating and concentrating organic and/or non-organic material
US8579999B2 (en) * 2004-10-12 2013-11-12 Great River Energy Method of enhancing the quality of high-moisture materials using system heat sources
US7275644B2 (en) 2004-10-12 2007-10-02 Great River Energy Apparatus and method of separating and concentrating organic and/or non-organic material
US7987613B2 (en) 2004-10-12 2011-08-02 Great River Energy Control system for particulate material drying apparatus and process
US20080028631A1 (en) * 2006-08-07 2008-02-07 Syntroleum Corporation System for drying fuel feedstocks
US20080028634A1 (en) * 2006-08-07 2008-02-07 Syntroleum Corporation Method for using heat from combustion turbine exhaust to dry fuel feedstocks
CN102732269A (zh) * 2011-03-29 2012-10-17 何巨堂 一种煤制焦装置干熄焦方法
CN102851047B (zh) * 2012-09-21 2014-03-05 山西鑫立能源科技有限公司 一种低变质烟煤的综合利用方法
CN104987869A (zh) * 2015-07-17 2015-10-21 南京贝特空调设备有限公司 干熄炉系统冷却装置
CN109423314A (zh) * 2017-09-01 2019-03-05 西安华江环保科技股份有限公司 一种干熄焦炉顶高温烟尘余热回收利用系统与方法

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Publication number Priority date Publication date Assignee Title
DE453464C (de) * 1924-04-05 1927-12-08 Heinrich Frohnhaeuser Anlage zum Trocknen und Vorwaermen von Kokskohle
US1854407A (en) * 1927-11-03 1932-04-19 U G I Contracting Company Means for preheating coal and cooling coke
US3007254A (en) * 1953-08-10 1961-11-07 Wilhelm F Schuster Process and apparatus for drying colloidal substances such as lignite
BE795029A (fr) * 1972-02-07 1973-05-29 Waagner Biro Ag Installation de cokerie et procede pour son exploitation
US3843458A (en) * 1972-02-07 1974-10-22 Waagner Biro American Coal treating method and apparatus for coke plants
US3793743A (en) * 1972-08-23 1974-02-26 Waagner Biro American Apparatus for drying coal
AT352678B (de) * 1973-04-13 1979-10-10 Waagner Biro Ag Verfahren zur hitzebehandlung von kohle, insbesondere kohleverkokungsverfahren und anlage zur durchfuehrung des verfahrens
FR2265840B3 (de) * 1974-04-01 1977-12-02 Buettner Schilde Haas Ag
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DE2626653C3 (de) * 1976-06-15 1982-01-07 Bergwerksverband Gmbh Verfahren und Vorrichtung zum Trocknen und Vorerhitzen von Kokskohle
FR2378081A1 (fr) * 1977-01-24 1978-08-18 Charbonnages De France Installation et procede de regulation du prechauffage de charbon a cokefier

Also Published As

Publication number Publication date
FR2462467A1 (fr) 1981-02-13
US4338160A (en) 1982-07-06
ES8107291A1 (es) 1981-10-01
ZA804256B (en) 1981-06-24
AU6045580A (en) 1981-02-05
DE3065524D1 (en) 1983-12-15
CA1161386A (fr) 1984-01-31
ES493629A0 (es) 1981-10-01
AU536140B2 (en) 1984-04-19
JPS5653183A (en) 1981-05-12
EP0023455A1 (de) 1981-02-04
RO81874A (ro) 1983-06-01
FR2462467B1 (de) 1982-06-18
BR8004744A (pt) 1981-02-10
RO81874B (ro) 1983-05-30

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