US20140373436A1 - Reformed coal production equipment - Google Patents

Reformed coal production equipment Download PDF

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Publication number
US20140373436A1
US20140373436A1 US14/373,542 US201314373542A US2014373436A1 US 20140373436 A1 US20140373436 A1 US 20140373436A1 US 201314373542 A US201314373542 A US 201314373542A US 2014373436 A1 US2014373436 A1 US 2014373436A1
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United States
Prior art keywords
gas
pyrolysis
heating
coal
temperature
Prior art date
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Abandoned
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US14/373,542
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English (en)
Inventor
Keiichi Nakagawa
Setsuo Omoto
Fumiaki Sato
Jun Satou
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKAGAWA, KEIICHI, OMOTO, SETSUO, SATO, FUMIAKI, SATOU, JUN
Publication of US20140373436A1 publication Critical patent/US20140373436A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
    • C10L5/28—Heating the shaped fuels, e.g. briquettes; Coking the binders
    • 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
    • C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C10B47/28—Other processes
    • C10B47/30—Other processes in rotary ovens or retorts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the present invention relates to upgraded coal production equipment, and is particularly useful when used to upgrade coal of low rank (low-rank coal), such as brown coal or subbituminous coal, which is porous and has a high water content.
  • low rank low-rank coal
  • brown coal or subbituminous coal which is porous and has a high water content.
  • Coal of low rank such as brown coal or subbituminous coal, which is porous and has a high water content generates a low amount of heat per unit weight, and is therefore dried through a heating treatment to have improved amount of heat generation per unit weight.
  • equipment including: an indirect-heating pyrolysis device which performs pyrolysis on low-rank coal by heating the low-rank coal indirectly by use of a heating gas; and a combustion furnace which generates the heating gas by combusting a pyrolysis gas generated in the pyrolysis device and supplied to the combustion furnace through a pyrolysis gas supply pipe.
  • the pyrolysis gas described above is composed of a low-boiling component.
  • the pyrolysis gas is accompanied by tar (pyrolysis oil) which is a high-boiling component.
  • tar pyrolysis oil
  • the tar is attached to a wall surface of a duct or the like through which the pyrolysis gas flows.
  • a problem might occur, such as clogging the duct.
  • various techniques have been developed to remove the tar.
  • Patent Document 1 discloses a decoking method for combusting and removing coke attached to the inside of a pipe by use of a gas which is obtained by adjusting air to have an oxygen concentration of 3 vol % to 21 vol % through dilution with water vapor or an inert gas, and which is also adjusted to have a temperature of 350° C. to 500° C.
  • Patent Document 2 discloses a method for performing a pyrolysis treatment on a processed object by using an external heating kiln.
  • an oxygen-containing gas is supplied into an inner cylinder of the external heating kiln to combust a carbide of organic matter in the processed object and/or a combustible gas, which are produced by pyrolysis.
  • the temperature of a pyrolysis gas increases, so that liquefaction or solidification is prevented.
  • Patent Document 1 Japanese Patent Application Publication No. Hei 5-188653 (see, e.g., paragraphs [0013], [0017], and the like)
  • Patent Document 2 Japanese Patent Application Publication No. 2004-3738 (see, e.g., paragraphs [0011], [0014], [0015], and the like)
  • the decoking has to be performed with the pyrolysis device itself being stopped.
  • two systems of ducts through which the pyrolysis device supplies the combustion furnace with a pyrolysis gas are provided, and the decoking has to be performed while stopping one of the systems. This entails decrease in operating rate of the equipment, size increase, and the like, causing increase in costs for producing upgraded coal. In other words, the tar cannot be removed efficiently.
  • the present invention has been made to solve the problems described above, and has an objective of providing upgraded coal production equipment capable of efficient tar removal without lowering the production volume of upgraded coal.
  • upgraded coal production equipment which includes drying means for drying coal, indirect-heating pyrolysis means for performing pyrolysis on the dried coal by indirectly heating the dried coal by use of a heating gas, and cooling means for cooling the coal subjected to the pyrolysis, and which is characterized in that the equipment comprises: heating gas generation means for generating the heating gas; pyrolysis gas supply means for supplying the heating gas generation means with a pyrolysis gas generated in the indirect-heating pyrolysis means; waste-heat gas generation means for receiving supply of part of the heating gas generated in the heating gas generation means and generating a waste-heat gas by subjecting the heating gas to heat exchange; and mixed gas supply means for supplying the pyrolysis gas supply means with the waste-heat gas and a low-temperature heating gas generated when the heating gas heats the coal indirectly in the indirect-heating pyrolysis means.
  • Upgraded coal production equipment for solving the above problems is the upgraded coal production equipment according to the first aspect of the invention described above, characterized in that the equipment further comprises gas temperature measurement means, provided at the pyrolysis gas supply means, for measuring a gas temperature, and the mixed gas supply means includes gas flow rate adjustment means for adjusting a flow rate of the waste-heat gas and the low-temperature heating gas supplied to the pyrolysis gas supply means, and control means for controlling the gas flow rate adjustment means based on the gas temperature measured by the gas temperature measurement means.
  • the low-temperature heating gas and the waste-heat gas can be supplied to the pyrolysis gas supply means.
  • the low-temperature heating gas and the waste-heat gas make the oxygen concentration about 1 to 2%, and thereby the tar is oxidatively decomposed.
  • the tar becomes light in weight and is thereby prevented from being attached to a wall surface of a duct or the like forming the pyrolysis gas supply means.
  • the temperature of the pyrolysis gas rises, which can prevent attachment of tar to a wall surface of the duct or the like forming the pyrolysis gas supply means.
  • the oxidative decomposition of the tar can be performed without stopping the device, and therefore the operating rate of the equipment can be improved compared to equipment which has to stop the device in order for the tar to be oxidatively decomposed. In other words, tar can be removed efficiently. Since the pyrolysis gas has almost the same temperature as the low-temperature heating gas and the waste-heat gas, preheating of the low-temperature heating gas and the waste-heat gas is unnecessary, which is energy-saving.
  • FIG. 1 is a schematic diagram showing the overall configuration of a main embodiment of upgraded coal production equipment according to the present invention.
  • FIG. 1 Based on FIG. 1 , a main embodiment of upgraded coal production equipment according to the present invention is described.
  • low-rank coal 1 such as brown coal or subbituminous coal is supplied to a drying device 111 by a hopper or the like (not shown), the drying device 111 being drying means for drying the low-rank coal 1 .
  • An outlet opening of the drying device 111 communicates with an inlet opening 122 a of a pyrolysis device 121 configured to perform pyrolysis on dried coal 2 .
  • An outlet opening 122 b of the pyrolysis device 121 communicates with an inlet opening of a cooling device 131 being cooling means for cooling pyrolysis coal 3 .
  • the pyrolysis device 121 has an inner cylinder 122 and an outer cylinder 123 surrounding the inner cylinder 122 .
  • the outer cylinder 123 is supplied with a heating gas 11 to be described later.
  • the dried coal 2 supplied into the inner cylinder 122 is indirectly heated and is subjected to pyrolysis, to generate the pyrolysis coal 3 .
  • the pyrolysis device 121 is an indirect-heating device, such as, e.g., an external heating kiln, in which a hot gas (heating gas) being a heat source does not come into direct contact with the low-rank coal 1 .
  • the pyrolysis device 121 forms indirect-heating pyrolysis means.
  • a gas exhaust port of the inner cylinder 122 of the pyrolysis device 121 communicates with a gas intake port of a combustion furnace 124 via a pyrolysis gas supply pipe 101 .
  • a pyrolysis gas 14 containing gaseous tar (pyrolysis oil) generated by the pyrolysis is supplied to the gas intake port of the combustion furnace 124 .
  • the gas intake port of the combustion furnace 124 is also supplied with a fuel (not shown) such as a natural gas.
  • the combustion furnace 124 generates the heating gas 11 by combusting the pyrolysis gas 14 and the fuel such as a natural gas. In other words, the combustion furnace 124 forms heating gas generation means.
  • a gas exhaust port of the combustion furnace 124 communicates with a gas intake port of the outer cylinder 123 of the pyrolysis device 121 via a heating gas feed pipe 51 .
  • the heating gas feed pipe 51 communicates with a gas intake port of a steam generator 125 via a heating gas branch pipe 53 .
  • the steam generator 125 forms waste-heat gas generation means for generating a waste-heat gas 13 through heat exchange between the heating gas 11 and water to thereby generate steam.
  • a gas exhaust port of the steam generator 125 communicates with an exhaust pipe 52 to be described later via a waste-heat gas feed pipe 54 .
  • a gas exhaust port of the outer cylinder 123 of the pyrolysis device 121 communicates with a gas intake port of an exhaust-gas treatment device 127 via the exhaust pipe 52 , the exhaust-gas treatment device 127 being exhaust-gas purification means for purifying the waste-heat gas 13 and a low-temperature heating gas 12 which is generated when the heating gas 11 heats the inner cylinder 122 .
  • the low-temperature heating gas 12 and the waste-heat gas 13 are discharged to the outside of the system after undergoing the purification treatment in the exhaust-gas treatment device 127 .
  • the exhaust pipe 52 communicates with a gas intake port of a blower 126 via a mixed gas feed pipe 55 .
  • a gas exhaust port of the blower 126 communicates with a gas intake port of the combustion furnace 124 via a mixed gas supply pipe 56 .
  • the mixed gas supply pipe 56 communicates with a mixed gas branch pipe 102 .
  • the mixed gas branch pipe 102 communicates with a mixed gas communication pipe 104 via a flow rate adjustment valve 103 .
  • the mixed gas communication pipe 104 communicates with the pyrolysis gas supply pipe 101 .
  • the pyrolysis gas supply pipe 101 is provided with a gas temperature measurement instrument 105 which is gas temperature measurement means for measuring the temperature of a gas inside the pipe.
  • the gas temperature measurement instrument 105 is connected to a control device 106 such that the measured gas temperature can be sent to the control device 106 , the control device 106 being control means for controlling the valve position of the flow rate adjustment valve 103 .
  • the exhaust pipe 52 , the waste-heat gas feed pipe 54 , the mixed gas feed pipe 55 , the blower 126 , the mixed gas supply pipe 56 , the mixed gas branch pipe 102 , the flow rate adjustment valve 103 , the mixed gas communication pipe 104 , and the like form mixed gas supply means.
  • the hopper supplies the low-rank coal 1 at a room temperature to the drying device 111 a predetermined amount at a time.
  • the low-rank coal 1 supplied to the drying device 111 is removed of water and becomes the dried coal 2 by being heated up to about 200° C. by a drying combustion gas (about 150 to 300° C.) from a drying combustor (not shown). Then, the dried coal 2 is transferred into the inner cylinder 122 of the pyrolysis device 121 .
  • the dried coal 2 transferred to the pyrolysis device 121 is subjected to pyrolysis by being indirectly heated by the heating gas 11 (gas temperature: about 1050° C., oxygen concentration: about 2 to 3%) from the combustion furnace 124 .
  • the dried coal 2 becomes the pyrolysis coal 3 as a result of removal of components such as the pyrolysis gas 14 containing gaseous tar, and the pyrolysis coal 3 is fed to the cooling device 131 .
  • the pyrolysis coal 3 fed to the cooling device 131 becomes upgraded coal 4 by being cooled down to about 50° C.
  • the heating gas 11 (gas temperature: about 1050° C., oxygen concentration: about 2 to 3%) generated in the combustion furnace 124 is fed to the outer cylinder 123 of the pyrolysis device 121 via the heating gas feed pipe 51 .
  • the heating gas 11 used inside the outer cylinder 123 to heat the inner cylinder 122 becomes the low-temperature heating gas 12 (gas temperature: about 350° C., oxygen concentration: about 2 to 3%).
  • the low-temperature heating gas 12 is fed to the exhaust pipe 52 .
  • the heating gas 11 is also fed to the steam generator 125 via the heating gas feed pipe 51 and the heating gas branch pipe 53 .
  • the heating gas 11 used in the steam generator 125 for generation of water vapor becomes the waste-heat gas 13 (gas temperature: about 350° C., oxygen concentration: about 2 to 3%).
  • the waste-heat gas 13 is fed to the exhaust pipe 52 via the waste-heat gas feed pipe 54 .
  • Part of the low-temperature heating gas 12 and the waste-heat gas 13 is supplied to the exhaust-gas treatment device 127 .
  • the low-temperature heating gas 12 and the waste-heat gas 13 undergo the purification treatment in the exhaust-gas treatment device 127 and are then discharged to the outside of the system.
  • the rest of the low-temperature heating gas 12 and the waste-heat gas 13 (gas temperature: about 350° C., oxygen concentration: about 2 to 3%) is fed to the blower 126 via the mixed gas feed pipe 55 .
  • Part of the low-temperature heating gas 12 and the waste-heat gas 13 fed to the blower 126 is supplied to the combustion furnace 124 via the mixed gas supply pipe 56 .
  • the rest of the low-temperature heating gas 12 and the waste-heat gas 13 (gas temperature: about 350° C., oxygen concentration: about 2 to 3%) fed to the blower 126 is supplied to the pyrolysis gas supply pipe 101 via the mixed gas branch pipe 102 , the flow rate adjustment valve 103 , and the mixed gas communication pipe 104 .
  • the valve position of the flow rate adjustment valve 103 is controlled by the control device 106 based on the gas temperature measured by the gas temperature measurement instrument 105 .
  • the control device 106 adjusts the flow rate adjustment valve 103 by opening it to increase the aperture when the gas temperature measured by the gas temperature measurement instrument 105 is equal to or higher than 400° C., and adjusts the flow rate adjustment valve 103 by narrowing it when the gas temperature exceeds 550° C.
  • the low-temperature heating gas 12 and the waste-heat gas 13 oxygen concentration: about 2 to 3%) are mixed with the pyrolysis gas 14 (gas temperature: about 400° C., oxygen concentration: about 0%), and this mixed gas has an oxygen concentration adjusted to about 1 to 2%.
  • gaseous tar (pyrolysis oil) is oxidatively decomposed (decoking) to become light in weight, and thereby attachment of the tar to the pyrolysis gas supply pipe 101 can be prevented.
  • the tar is reduced in weight to become a light gas, and this light gas is combusted.
  • decrease in the gas temperature is prevented.
  • attachment of the tar to the pyrolysis gas supply pipe 101 can be prevented.
  • the decoking is performed just when the tar is about to be attached to the inner wall surface of the pyrolysis gas supply pipe 101 by adjustment of the amount of the low-temperature heating gas 12 and the waste-heat gas 13 supplied to the pyrolysis gas supply pipe 101 based on the gas temperature inside the pyrolysis gas supply pipe 101 .
  • the tar can be efficiently removed.
  • the oxygen concentration of the gases 12 , 13 , 14 in the pyrolysis gas supply pipe 101 is adjusted to about 1 to 2%, so that tar contained in the pyrolysis gas 14 (pyrolysis oil) is oxidatively decomposed (decoking) to become light in weight. Thereby, attachment of the tar to the pyrolysis gas supply pipe 101 can be prevented.
  • the temperature of the pyrolysis gas 14 rises, which can prevent attachment of the pyrolysis oil to a wall surface of the pyrolysis gas supply pipe 101 and the like. Since the pyrolysis gas 14 has almost the same temperature as the low-temperature heating gas 12 and the waste-heat gas 13 , preheating of the low-temperature heating gas 12 and the waste-heat gas 13 is unnecessary, which is energy-saving. Furthermore, since decoking can be performed to remove tar without stopping the device, the operating rate of the equipment can be improved compared to equipment which has to stop the device to decoke the device for tar removal. In other words, tar can be removed efficiently.
  • the upgraded coal production equipment according to the present invention can remove tar efficiently without lowering the production volume of upgraded coal, and can therefore be utilized significantly beneficially in various industries.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Coke Industry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
US14/373,542 2012-02-24 2013-02-21 Reformed coal production equipment Abandoned US20140373436A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012-038514 2012-02-24
JP2012038514A JP5804971B2 (ja) 2012-02-24 2012-02-24 改質石炭製造設備
PCT/JP2013/054251 WO2013125608A1 (ja) 2012-02-24 2013-02-21 改質石炭製造設備

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US20140373436A1 true US20140373436A1 (en) 2014-12-25

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US14/373,542 Abandoned US20140373436A1 (en) 2012-02-24 2013-02-21 Reformed coal production equipment

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US (1) US20140373436A1 (xx)
JP (1) JP5804971B2 (xx)
CN (1) CN104066823B (xx)
AU (1) AU2013223200B2 (xx)
DE (1) DE112013001130T5 (xx)
IN (1) IN2014DN05934A (xx)
WO (1) WO2013125608A1 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140366433A1 (en) * 2012-01-06 2014-12-18 Mitsubishi Heavy Industries, Ltd. Coal deactivation treatment device
US9701919B2 (en) 2013-03-04 2017-07-11 Mitsubishi Heavy Industries, Ltd. Coal inactivation processing apparatus
US9758741B2 (en) 2012-10-09 2017-09-12 Mitsubishi Heavy Industries, Ltd. Coal deactivation processing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017125297B4 (de) * 2017-10-27 2021-03-04 ARCUS Technologie GmbH & Co GTL Projekt KG Verfahren zur Herstellung von Koks und/oder Pyrolysegas in einem Drehrohrofen

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0584413A1 (en) * 1991-04-05 1994-03-02 Pasco Nominees Pty Ltd Pyrolysis process

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ID20131A (id) * 1997-03-31 1998-10-08 Mitsubishi Heavy Ind Ltd Metode dan peralatan pengeringan batu bara, metode untuk penyimpanan lama batu bara yang direformasi dan batu bara yang direformasi yang disimpan lama, dan proses dan sistem untuk produksi batu bara yang direformasi
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CN101376813B (zh) * 2007-08-28 2011-12-21 三菱重工业株式会社 高含水有机物的碳化处理方法及其装置
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EP0584413A1 (en) * 1991-04-05 1994-03-02 Pasco Nominees Pty Ltd Pyrolysis process
EP0584413B1 (en) * 1991-04-05 1997-02-26 Pasco Nominees Pty Ltd Pyrolysis process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140366433A1 (en) * 2012-01-06 2014-12-18 Mitsubishi Heavy Industries, Ltd. Coal deactivation treatment device
US9617491B2 (en) * 2012-01-06 2017-04-11 Mitsubishi Heavy Industries, Ltd. Coal deactivation treatment device
US9758741B2 (en) 2012-10-09 2017-09-12 Mitsubishi Heavy Industries, Ltd. Coal deactivation processing device
US9701919B2 (en) 2013-03-04 2017-07-11 Mitsubishi Heavy Industries, Ltd. Coal inactivation processing apparatus

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DE112013001130T5 (de) 2014-11-06
IN2014DN05934A (xx) 2015-06-12
AU2013223200B2 (en) 2015-07-16
CN104066823B (zh) 2016-01-20
WO2013125608A1 (ja) 2013-08-29
CN104066823A (zh) 2014-09-24
JP2013173831A (ja) 2013-09-05
JP5804971B2 (ja) 2015-11-04
AU2013223200A1 (en) 2014-08-14

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