WO2011016370A1 - Method for producing modified coal - Google Patents

Method for producing modified coal Download PDF

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Publication number
WO2011016370A1
WO2011016370A1 PCT/JP2010/062673 JP2010062673W WO2011016370A1 WO 2011016370 A1 WO2011016370 A1 WO 2011016370A1 JP 2010062673 W JP2010062673 W JP 2010062673W WO 2011016370 A1 WO2011016370 A1 WO 2011016370A1
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coal
dry
modified
mixing
manufacturing
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PCT/JP2010/062673
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French (fr)
Japanese (ja)
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慶一 中川
節男 大本
桂二 谷崎
文昭 佐藤
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三菱重工業株式会社
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Priority to AU2010280128A priority Critical patent/AU2010280128B2/en
Publication of WO2011016370A1 publication Critical patent/WO2011016370A1/en

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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
    • 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

Definitions

  • the present invention relates to a method for producing reformed coal, and is particularly effective when applied to a case where reformed coal is obtained by reforming low-grade coal (low quality coal) having a high water content such as lignite and subbituminous coal. Is.
  • Low grade coal with high water content such as lignite and subbituminous coal has high reserves but has low calorific value per unit weight and poor transport efficiency. As a result, the calorific value per unit weight is increased and the handleability is improved by compression molding.
  • the heat-treated low-quality coal easily adsorbs water, and the surface carboxyl groups and the like are released to generate radicals and the like, thereby increasing the surface activity and reacting with oxygen in the air. Since it becomes easy, there exists a possibility that it may ignite spontaneously with the reaction heat accompanying the said reaction.
  • the present invention provides a method for producing modified coal that can suppress spontaneous ignition at low cost without using volatile components such as tar separated and recovered by dry distillation. Objective.
  • the method for producing modified coal according to the first invention for solving the above-described problems includes a drying step of drying coal to obtain dry coal, and carbonizing the dry coal obtained in the drying step.
  • a carbonization process for obtaining carbonized carbon a mixing process for mixing the carbonized carbon obtained in the carbonization process and pulverized coal generated and recovered during drying in the drying process, and mixing in the mixing process And performing a compression molding step of compression-molding the mixed coal to obtain modified coal.
  • the method for producing modified coal according to the second invention is the first invention, wherein the mixing step adjusts the ratio of the dry-distilled coal and the pulverized coal so that the following conditional expression (1) is satisfied. And mixing. 0.3 ⁇ B / A ⁇ 0.9 (1) However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
  • the method for producing modified coal according to the third invention is the method of further mixing the leaked coal recovered by leaking before the mixing step is dried in the drying step in the first invention. It is characterized by being.
  • a method for producing a modified coal In the third aspect of the invention, the mixing step, the carbonized coal, the pulverized coal, and the leaked coal so that the following conditional expression (1) is satisfied: It is the process of adjusting and mixing the ratio of this. 0.3 ⁇ B / A ⁇ 0.9 (1) However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
  • the method for producing a modified coal according to the fifth invention is that the compression molding temperature in the compression molding step is lower than the dry distillation temperature in the dry distillation step.
  • the method for producing modified coal according to the sixth invention is characterized in that, in any one of the first to fifth inventions, the pulverized coal has an average particle diameter of 200 ⁇ m or less.
  • the method for producing modified coal according to the seventh invention is characterized in that, in any of the first to sixth inventions, the coal is low-grade coal.
  • pulverized coal containing approximately the same volatile components as dry coal that has been recovered in the drying process and disposed of until now is mixed with dry-distilled coal.
  • Volatile components separated and recovered by dry distillation of dry coal do not need to be added again to the modified coal, and all the volatile components recovered by dry distillation can be effectively used for other purposes. Even if volatile components are not used, spontaneous ignition can be suppressed at low cost, and pulverized coal that has been disposed of in the past can be used effectively, so that further cost reduction can be achieved.
  • the method for producing modified coal according to the present embodiment is a drying step S ⁇ b> 1 in which low-grade coal (low-quality coal) 1 is dried to obtain dry coal 2, and drying obtained in the drying step S ⁇ b> 1.
  • the step S3 and the compression molding step S4 to obtain the modified coal 7 by compression molding the mixed coal 6 mixed in the mixing step S3 are performed.
  • the low quality coal 1 is a coal having a high water content (60 to 70%) such as lignite and subbituminous coal, and has a large reserve, but has a low calorific value per unit weight and a poor transport efficiency. It is.
  • the drying step S1 is a step of removing the water 8 from the low quality coal 1 and is supplied to a hot air dryer such as a belt conveyor type to dry with hot air (100 to 280 ° C. (preferably 150 to 200 ° C.)). ) To produce dry charcoal 2 having a moisture content of approximately 0%.
  • a hot air dryer such as a belt conveyor type to dry with hot air (100 to 280 ° C. (preferably 150 to 200 ° C.)).
  • pulverized coal 3 (average particle size: about 200 ⁇ m or less) is generated along with the drying, and is carried out together with the hot air and released into the atmosphere.
  • the pulverized coal 3 is recovered from the hot air by a pulverizer such as a cyclone or a filter provided in the exhaust duct of the machine.
  • the dry distillation step S2 is a step of removing volatile components 9 such as tar from the dry coal 2.
  • the dry coal 2 is supplied to a continuous dry distillation machine and heated to a high temperature (300 to 500 ° C. (preferably 400 ° C.)).
  • the dry distillation coal 5 is produced by dry distillation at ⁇ 450 ° C.) and separating and recovering volatile components 9 such as tar.
  • the mixing step S3 is a step of mixing the pulverized coal 3 recovered from the hot air with the hot air dryer or the like of the drying step S1 into the dry distillation coal 5, and the pulverized coal 3 recovered by the recovery means is mixed with the dry distillation coal.
  • the mixed coal 6 is manufactured by supplying the mixture into the mixer together with 5 and stirring the mixture so as to be uniformly mixed.
  • the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B
  • the ratio of B to the A is 0.3 to 0.9 (0.3 ⁇ B / A ⁇ 0.9 Formula (1)), in particular 0.5 to 0.7 (0.5 ⁇ B / A ⁇ 0.7)
  • the ratio (A) of the volatile component 9 in the dry coal 2 is a value obtained in advance by the composition analysis before the mixing
  • the ratio of the volatile component 9 in the pulverized coal 3 is the value in the dry coal 2.
  • the value (A) is substantially the same as the ratio (A) of the volatile component 9.
  • the ratio (C) of the volatile component 9 in the carbonized coal 5 is a value that can be set in advance before the mixing depending on the carbonization conditions such as the carbonization temperature and the carbonization time, and is accurately grasped by the composition analysis before the mixing.
  • the ratio (B) of the volatile component 9 in the reformed coal 7 is a value set in advance before the mixing according to the characteristics required for the reformed coal 7.
  • the compression molding step S4 is a mixed coal in which pulverized coal 3 containing volatile components 9 such as tar as it is is mixed with dry distillation coal 5 in which volatile components 9 such as tar are separated and removed to a great extent. 6 is compressed (1200 kg / cm 2 ⁇ 300 to 450 ° C. (preferably 350 to 400 ° C.)) and formed into a solid briquette such as a columnar shape or a tadon shape to produce modified coal 7.
  • the reformed coal 7 produced in this way is molded so as to contain the volatile components 9 such as tar in the pulverized coal 3 evenly, so that the strength as a molded product is increased, and spontaneous combustion occurs. Is suppressed.
  • the drying step S1 is performed.
  • the pulverized coal 3 containing the volatile component 9 substantially the same as the dry coal 2 that has been recovered and disposed of up to now the pyrolysis coal 5 is mixed to suppress spontaneous ignition of the modified coal 7. It is.
  • the dry coal 2 is dry-distilled and separated. There is no need to add the recovered volatile component 9 to the modified coal 7 again, and all the volatile component 9 recovered by dry distillation can be used effectively for other purposes.
  • the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B
  • the ratio of B to the A (B / A) to be 0.3 to 0.9 (0.3 ⁇ B / A ⁇ 0.9 Formula (1)), in particular, to be 0.5 to 0.7 ( 0.5 ⁇ B / A ⁇ 0.7)
  • adjusting the ratio of the carbonized coal 5 and the pulverized coal 3 not only suppresses spontaneous ignition but also necessitates the crushing load of the modified coal 7 Can be made large (about 50 kg), and the handleability of the modified coal 7 can be greatly improved.
  • the mixing amount of the pulverized coal 3 it is possible to separate and recover the volatile component 9 in the dry distillation coal 5 as much as possible by setting the dry distillation temperature as high as possible, so that it can be effectively used for other applications.
  • the amount of the volatile component 9 can be further increased.
  • the compression molding temperature Tp in the compression molding step S4 is preferably lower than the dry distillation temperature Td in the dry distillation step S2 (Tp ⁇ Td). This is because if the compression molding temperature Tp is higher than the dry distillation temperature Td, the volatile component 9 is distilled off during compression molding, which may cause a reduction in the proportion of the volatile component 9 in the modified coal 7. Because.
  • the method for producing modified coal according to the present embodiment is a drying step S ⁇ b> 1 in which low-grade coal (low quality coal) 1 is dried to obtain dry coal 2, and drying obtained in the drying step S ⁇ b> 1.
  • the carbonization step S2 for carbonizing the charcoal 2 to obtain the carbonization coal 5 the carbonization coal 5 obtained in the carbonization step S2, the pulverized coal 3 generated and recovered by drying in the drying step S1, and the drying step S1
  • the leaked charcoal 4 leaks from the dryer when it is supplied to a hot air dryer such as a belt conveyor type, and is recovered without being completely dried. In the past, it was discarded.
  • the mixing step S13 is a step of mixing the pulverized coal 3 recovered from the hot air in the drying step S1 and the leaked coal 4 leaked and recovered from the dryer in the drying step S1 into the dry distillation coal 5. Yes, the coal pulverized coal 3 and the leaked coal 4 are supplied into the mixer together with the carbonized coal 5 and stirred so as to be mixed uniformly, thereby producing the coal mixture 16.
  • the ratio of B to the A (B / A) is set to 0.3 to 0.9 (0.3 ⁇ B / A ⁇ 0.9 Formula (1)), and in particular, 0.5 to 0.7 (0 0.5 ⁇ B / A ⁇ 0.7), it is preferable to adjust and mix the ratio of the carbonized coal 5, the pulverized coal 3 and the leaked coal 4.
  • the leaked coal 4 contains water 8, but the water 8 evaporates during compression molding and almost disappears. Therefore, the ratio of the volatile component 9 in the leaked coal 4 is a value obtained by subtracting the contained water 8. That is, the value (A) is substantially the same as the ratio (A) of the volatile component 9 in the dry charcoal 2.
  • the pulverized coal 3 and the leaked coal containing the volatile component 9 such as tar as it is with respect to the dry-distilled coal 5 in which the volatile component 9 such as tar is separated and removed.
  • the mixed coal 16 mixed with 4 is compressed (1000 to 2000 kg / cm 2 ⁇ 300 to 400 ° C.) and formed into a solid briquette such as a cylindrical shape or a tadon shape, thereby producing the modified coal 7.
  • the reformed coal 7 produced in this way is molded so as to uniformly contain volatile components 9 such as tar in the pulverized coal 3 as in the case of the above-described embodiment. As a result, spontaneous ignition is suppressed.
  • the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B
  • the ratio of B to the A (B / A) to be 0.3 to 0.9 (0.3 ⁇ B / A ⁇ 0.9 Formula (1)), in particular, to be 0.5 to 0.7 ( 0.5 ⁇ B / A ⁇ 0.7)
  • spontaneous combustion is performed as in the case of the above-described embodiment. Not only can it be suppressed, but the crushing load of the modified coal 7 can be increased to a necessary and sufficient level (about 50 kg), and the handleability of the modified coal 7 can be greatly improved.
  • the method for producing modified coal according to the present invention can suppress spontaneous ignition at low cost without using volatile components separated and recovered by dry distillation, and effectively uses pulverized coal that has been disposed of in the past. Since it can be used and further cost reduction can be achieved, it can be used extremely beneficially industrially.

Abstract

Disclosed is a method for producing modified coal, which comprises: a drying step (S1) in which dried coal (2) is obtained by drying low-quality coal (1); a dry distillation step (S2) in which dry-distilled coal (5) is obtained by dry-distilling the dried coal (2) that has been obtained in the drying step (S1); a mixing step (S3) in which the dry-distilled coal (5) that has been obtained in the dry distillation step (S2) is mixed with fine powder coal (3) that has been generated and collected during the drying in the drying step (S1); and a compression molding step (S4) in which modified coal (7) is obtained by compression molding mixed coal (6) that has been obtained in the mixing step (S3).

Description

改質石炭の製造方法Method for producing modified coal
　本発明は、改質石炭の製造方法に関し、特に、褐炭や亜瀝青炭等のような水分含有量の多い低品位石炭（低質炭）を改質して改質石炭を得る場合に適用すると有効なものである。 The present invention relates to a method for producing reformed coal, and is particularly effective when applied to a case where reformed coal is obtained by reforming low-grade coal (low quality coal) having a high water content such as lignite and subbituminous coal. Is.
　褐炭や亜瀝青炭等のような水分含有量の多い低品位石炭（低質炭）は、埋蔵量が多いものの、単位重量当たりの発熱量が低いと共に、輸送効率が悪いため、加熱処理して乾燥させることにより、単位重量当たりの発熱量を高めると共に、圧縮成形することにより、ハンドリング性を高めるようにしている。 Low grade coal (low quality coal) with high water content such as lignite and subbituminous coal has high reserves but has low calorific value per unit weight and poor transport efficiency. As a result, the calorific value per unit weight is increased and the handleability is improved by compression molding.
　ところで、加熱処理された上記低質炭は、水を吸着しやすくなると共に、表面のカルボキシル基等が離脱して表面にラジカル等を生じることにより表面の活性が高くなって空気中の酸素と反応しやすくなってしまうことから、上記反応に伴う反応熱によって自然発火してしまうおそれがある。 By the way, the heat-treated low-quality coal easily adsorbs water, and the surface carboxyl groups and the like are released to generate radicals and the like, thereby increasing the surface activity and reacting with oxygen in the air. Since it becomes easy, there exists a possibility that it may ignite spontaneously with the reaction heat accompanying the said reaction.
　このため、例えば、下記特許文献１等においては、低質炭を乾燥（１５０℃）して乾留（２５０～４５０℃）し、タールを分離した後、乾留炭を冷却（２００℃以下）して当該乾留炭に上記タールを添加し、当該乾留炭を当該タールでコーティングすることにより、上記炭を改質して当該炭の自然発火を抑制することを提案している。 For this reason, for example, in the following Patent Document 1, etc., low-quality coal is dried (150 ° C.), dry-distilled (250 to 450 ° C.), tar is separated, and the dry-distilled coal is cooled (200 ° C. or lower). It has been proposed to modify the charcoal by adding the tar to the dry-distilled coal and coating the dry-distilled coal with the tar to suppress the spontaneous ignition of the charcoal.
特開昭６０－０６３２９３号公報Japanese Patent Application Laid-Open No. 60-063293
　しかしながら、前記特許文献１等に記載されている発明においては、別途利用するために乾留して分離回収したタール等の揮発成分を乾留炭に再度加えるようにすることから、わざわざ分離回収したタール等の揮発成分を他の用途に十分に有効利用することができなかった。 However, in the invention described in Patent Document 1 and the like, since volatile components such as tar separated and recovered by dry distillation for separate use are added again to the carbonized coal, the tar and the like separately recovered and recovered. It was not possible to effectively use the volatile components of the product for other purposes.
　このようなことから、本発明は、乾留して分離回収したタール等の揮発成分を使用しなくても、自然発火を抑制することが低コストでできる改質石炭の製造方法を提供することを目的とする。 Therefore, the present invention provides a method for producing modified coal that can suppress spontaneous ignition at low cost without using volatile components such as tar separated and recovered by dry distillation. Objective.
　前述した課題を解決するための、第一番目の発明に係る改質石炭の製造方法は、石炭を乾燥させて乾燥炭を得る乾燥工程と、前記乾燥工程で得られた前記乾燥炭を乾留して乾留炭を得る乾留工程と、前記乾留工程で得られた前記乾留炭と前記乾燥工程での乾燥に伴って発生して回収された微粉炭とを混合する混合工程と、前記混合工程で混合された混合炭を圧縮成形して改質石炭を得る圧縮成形工程とを行うことを特徴とする。 The method for producing modified coal according to the first invention for solving the above-described problems includes a drying step of drying coal to obtain dry coal, and carbonizing the dry coal obtained in the drying step. A carbonization process for obtaining carbonized carbon, a mixing process for mixing the carbonized carbon obtained in the carbonization process and pulverized coal generated and recovered during drying in the drying process, and mixing in the mixing process And performing a compression molding step of compression-molding the mixed coal to obtain modified coal.
　第二番目の発明に係る改質石炭の製造方法は、第一番目の発明において、前記混合工程が、下記の条件式（１）を満たすように前記乾留炭と前記微粉炭との割合を調整して混合する工程であることを特徴とする。
　０．３≦Ｂ／Ａ≦０．９　　　（１）
　ただし、Ａは前記乾燥炭中の揮発成分の割合、Ｂは前記改質石炭中の揮発成分の割合である。 The method for producing modified coal according to the second invention is the first invention, wherein the mixing step adjusts the ratio of the dry-distilled coal and the pulverized coal so that the following conditional expression (1) is satisfied. And mixing.
0.3 ≦ B / A ≦ 0.9 (1)
However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
　第三番目の発明に係る改質石炭の製造方法は、第一番目の発明において、前記混合工程が、前記乾燥工程で乾燥される前に漏出して回収された漏出炭をさらに混合する工程であることを特徴とする。 The method for producing modified coal according to the third invention is the method of further mixing the leaked coal recovered by leaking before the mixing step is dried in the drying step in the first invention. It is characterized by being.
　第四番目の発明に係る改質石炭の製造方法は、第三番目の発明において、前記混合工程が、下記の条件式（１）を満たすように前記乾留炭と前記微粉炭と前記漏出炭との割合を調整して混合する工程であることを特徴とする。
　０．３≦Ｂ／Ａ≦０．９　　　（１）
　ただし、Ａは前記乾燥炭中の揮発成分の割合、Ｂは前記改質石炭中の揮発成分の割合である。 According to a fourth aspect of the present invention, there is provided a method for producing a modified coal. In the third aspect of the invention, the mixing step, the carbonized coal, the pulverized coal, and the leaked coal so that the following conditional expression (1) is satisfied: It is the process of adjusting and mixing the ratio of this.
0.3 ≦ B / A ≦ 0.9 (1)
However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
　第五番目の発明に係る改質石炭の製造方法は、第一番目から第四番目の発明のいずれかにおいて、前記圧縮成形工程における圧縮成形温度が、前記乾留工程における乾留温度よりも低いことを特徴とする。 In any one of the first to fourth inventions, the method for producing a modified coal according to the fifth invention is that the compression molding temperature in the compression molding step is lower than the dry distillation temperature in the dry distillation step. Features.
　第六番目の発明に係る改質石炭の製造方法は、第一番目から第五番目の発明のいずれかにおいて、前記微粉炭が、平均粒径２００μｍ以下のものであることを特徴とする。 The method for producing modified coal according to the sixth invention is characterized in that, in any one of the first to fifth inventions, the pulverized coal has an average particle diameter of 200 μm or less.
　第七番目の発明に係る改質石炭の製造方法は、第一番目から第六番目の発明のいずれかにおいて、前記石炭が、低品位石炭であることを特徴とする。 The method for producing modified coal according to the seventh invention is characterized in that, in any of the first to sixth inventions, the coal is low-grade coal.
　本発明に係る改質石炭の製造方法によれば、乾燥工程で回収されて今まで廃棄処分されていた、乾燥炭と略同一の揮発成分を含有する微粉炭を乾留炭に混合することから、乾燥炭を乾留して分離回収した揮発成分を改質石炭に再び加える必要がまったくなく、乾留して回収した揮発成分をすべて他の用途に有効利用することができるので、乾留して分離回収した揮発成分を使用しなくても、自然発火を抑制することが低コストでできると共に、従来廃棄処分していた微粉炭を有効利用することができるので、さらなる低コスト化を図ることができる。 According to the method for producing modified coal according to the present invention, pulverized coal containing approximately the same volatile components as dry coal that has been recovered in the drying process and disposed of until now is mixed with dry-distilled coal. Volatile components separated and recovered by dry distillation of dry coal do not need to be added again to the modified coal, and all the volatile components recovered by dry distillation can be effectively used for other purposes. Even if volatile components are not used, spontaneous ignition can be suppressed at low cost, and pulverized coal that has been disposed of in the past can be used effectively, so that further cost reduction can be achieved.
本発明に係る改質石炭の製造方法の第一番目の実施形態の手順フロー図である。It is a procedure flow figure of a first embodiment of a manufacturing method of reformed coal concerning the present invention. 本発明に係る改質石炭の製造方法の第二番目の実施形態の手順フロー図である。It is a procedure flow figure of a 2nd embodiment of a manufacturing method of reformed coal concerning the present invention.
　本発明に係る改質石炭の製造方法の実施形態を図面に基づいて以下に説明するが、本発明は図面に基づいて説明する以下の実施形態のみに限定されるものではない。 Embodiments of a method for producing modified coal according to the present invention will be described below with reference to the drawings. However, the present invention is not limited to only the following embodiments described with reference to the drawings.
〈第一番目の実施形態〉
　本発明に係る改質石炭の製造方法の第一番目の実施形態を図１に基づいて説明する。 <First embodiment>
1st Embodiment of the manufacturing method of the modified coal which concerns on this invention is described based on FIG.
　本実施形態に係る改質石炭の製造方法は、図１に示すように、低品位石炭（低質炭）１を乾燥させて乾燥炭２を得る乾燥工程Ｓ１と、乾燥工程Ｓ１で得られた乾燥炭２を乾留して乾留炭５を得る乾留工程Ｓ２と、乾留工程Ｓ２で得られた乾留炭５と乾燥工程Ｓ１での乾燥に伴って発生して回収された微粉炭３とを混合する混合工程Ｓ３と、混合工程Ｓ３で混合された混合炭６を圧縮成形して改質石炭７を得る圧縮成形工程Ｓ４とを行うものである。 As shown in FIG. 1, the method for producing modified coal according to the present embodiment is a drying step S <b> 1 in which low-grade coal (low-quality coal) 1 is dried to obtain dry coal 2, and drying obtained in the drying step S <b> 1. Mixing of the carbonization process S2 for carbonizing the charcoal 2 to obtain the carbonization coal 5 and the pulverized coal 3 generated and recovered by drying in the drying process S1 and the carbonization coal 5 obtained in the carbonization process S2. The step S3 and the compression molding step S4 to obtain the modified coal 7 by compression molding the mixed coal 6 mixed in the mixing step S3 are performed.
　前記低質炭１は、褐炭や亜瀝青炭等のような水分含有量が多い（６０～７０％）石炭であり、埋蔵量が多いものの、単位重量当たりの発熱量が低いと共に、輸送効率が悪いものである。 The low quality coal 1 is a coal having a high water content (60 to 70%) such as lignite and subbituminous coal, and has a large reserve, but has a low calorific value per unit weight and a poor transport efficiency. It is.
　前記乾燥工程Ｓ１は、前記低質炭１から水８を除去する工程であり、例えば、ベルトコンベア式等の熱風乾燥機等に供給して熱風乾燥（１００～２８０℃（好ましくは１５０～２００℃））することにより、水分含有量を略０％とした乾燥炭２を製造する。 The drying step S1 is a step of removing the water 8 from the low quality coal 1 and is supplied to a hot air dryer such as a belt conveyor type to dry with hot air (100 to 280 ° C. (preferably 150 to 200 ° C.)). ) To produce dry charcoal 2 having a moisture content of approximately 0%.
　ここで、上記熱風乾燥の際には、当該乾燥に伴って微粉炭３（平均粒径：約２００μｍ以下）が発生し、当該熱風と共に搬出されて大気へ放出されてしまうことから、前記熱風乾燥機の排気ダクトに設けたサイクロンやフィルタ等の微粉回収手段で上記微粉炭３を上記熱風から回収する。 Here, during the hot air drying, pulverized coal 3 (average particle size: about 200 μm or less) is generated along with the drying, and is carried out together with the hot air and released into the atmosphere. The pulverized coal 3 is recovered from the hot air by a pulverizer such as a cyclone or a filter provided in the exhaust duct of the machine.
　前記乾留工程Ｓ２は、前記乾燥炭２からタール等の揮発成分９を除去する工程であり、例えば、連続式の乾留機に上記乾燥炭２を供給し、高温（３００～５００℃（好ましくは４００～４５０℃））で乾留して、タール等の揮発成分９を分離回収することにより、乾留炭５を製造する。 The dry distillation step S2 is a step of removing volatile components 9 such as tar from the dry coal 2. For example, the dry coal 2 is supplied to a continuous dry distillation machine and heated to a high temperature (300 to 500 ° C. (preferably 400 ° C.)). The dry distillation coal 5 is produced by dry distillation at ˜450 ° C.) and separating and recovering volatile components 9 such as tar.
　前記混合工程Ｓ３は、上記乾燥工程Ｓ１の熱風乾燥機等で上記熱風から回収された微粉炭３を上記乾留炭５に混合する工程であり、上記回収手段で回収された微粉炭３を乾留炭５と共に混合機内へ供給して、均一に混ざるように攪拌することにより、混合炭６を製造する。 The mixing step S3 is a step of mixing the pulverized coal 3 recovered from the hot air with the hot air dryer or the like of the drying step S1 into the dry distillation coal 5, and the pulverized coal 3 recovered by the recovery means is mixed with the dry distillation coal. The mixed coal 6 is manufactured by supplying the mixture into the mixer together with 5 and stirring the mixture so as to be uniformly mixed.
　このとき、乾燥炭２中の揮発成分９の割合をＡとし、改質石炭７中の揮発成分９の割合をＢとすると、上記Ａに対する上記Ｂの割合（Ｂ／Ａ）が０．３～０．９となるように（０．３≦Ｂ／Ａ≦０．９・・・式（１））、特には０．５～０．７となるように（０．５≦Ｂ／Ａ≦０．７）、上記乾留炭５と上記微粉炭３との割合を調整して混合すると好ましい。 At this time, when the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B, the ratio of B to the A (B / A) is 0.3 to 0.9 (0.3 ≦ B / A ≦ 0.9 Formula (1)), in particular 0.5 to 0.7 (0.5 ≦ B / A ≦ 0.7), it is preferable to adjust the ratio of the carbonized carbon 5 and the pulverized coal 3 and mix them.
　なお、乾燥炭２中の揮発成分９の割合（Ａ）は、組成分析によって上記混合前に予め把握される値であり、微粉炭３中の揮発成分９の割合は、上記乾燥炭２中の揮発成分９の割合（Ａ）と実質的にほとんど同一の値（Ａ）である。また、乾留炭５中の揮発成分９の割合（Ｃ）は、乾留温度や乾留時間等の乾留条件によって、上記混合前に予め設定できる値であり、上記混合前の組成分析によって正確に把握される。そして、改質石炭７中の揮発成分９の割合（Ｂ）は、当該改質石炭７の必要とする特性等に応じて上記混合前に予め設定される値である。 In addition, the ratio (A) of the volatile component 9 in the dry coal 2 is a value obtained in advance by the composition analysis before the mixing, and the ratio of the volatile component 9 in the pulverized coal 3 is the value in the dry coal 2. The value (A) is substantially the same as the ratio (A) of the volatile component 9. Moreover, the ratio (C) of the volatile component 9 in the carbonized coal 5 is a value that can be set in advance before the mixing depending on the carbonization conditions such as the carbonization temperature and the carbonization time, and is accurately grasped by the composition analysis before the mixing. The The ratio (B) of the volatile component 9 in the reformed coal 7 is a value set in advance before the mixing according to the characteristics required for the reformed coal 7.
　前記圧縮成形工程Ｓ４は、タール等の揮発成分９が分離除去されて非常に少なくなった乾留炭５に対して、タール等の揮発成分９をそのまま含有している微粉炭３を混合した混合炭６を圧縮（１２００ｋｇ／ｃｍ2×３００～４５０℃（好ましくは３５０～４００℃））して円柱状やタドン状等の固形のブリケットに成形することにより、改質石炭７を製造する。 The compression molding step S4 is a mixed coal in which pulverized coal 3 containing volatile components 9 such as tar as it is is mixed with dry distillation coal 5 in which volatile components 9 such as tar are separated and removed to a great extent. 6 is compressed (1200 kg / cm 2 × 300 to 450 ° C. (preferably 350 to 400 ° C.)) and formed into a solid briquette such as a columnar shape or a tadon shape to produce modified coal 7.
　このようにして製造された改質石炭７は、微粉炭３中のタール等の揮発成分９を全体にまんべんなく含むように成形されていることから、成形物としての強度が高められつつ、自然発火が抑制される。 The reformed coal 7 produced in this way is molded so as to contain the volatile components 9 such as tar in the pulverized coal 3 evenly, so that the strength as a molded product is increased, and spontaneous combustion occurs. Is suppressed.
　つまり、従来は、乾燥炭を乾留して得られた揮発成分を乾留炭に再び加えることにより、改質石炭の自然発火を抑制するようにしていたが、本実施形態においては、乾燥工程Ｓ１で回収されて今まで廃棄処分されていた、乾燥炭２と略同一の揮発成分９を含有する微粉炭３を乾留炭５に混合することにより、改質石炭７の自然発火を抑制するようにしたのである。 That is, conventionally, the volatile component obtained by carbonizing dry coal was added to the carbonized coal again to suppress spontaneous ignition of the modified coal. However, in the present embodiment, the drying step S1 is performed. By mixing the pulverized coal 3 containing the volatile component 9 substantially the same as the dry coal 2 that has been recovered and disposed of up to now, the pyrolysis coal 5 is mixed to suppress spontaneous ignition of the modified coal 7. It is.
　このため、本実施形態においては、今まで廃棄処分されていた微粉炭３を利用して改質石炭７の自然発火を抑制することができるようにしたことから、乾燥炭２を乾留して分離回収した揮発成分９を改質石炭７に再び加える必要がまったくなくなり、乾留して回収した揮発成分９をすべて他の用途に有効利用することができる。 For this reason, in this embodiment, since the spontaneous combustion of the modified coal 7 can be suppressed using the pulverized coal 3 that has been disposed of up to now, the dry coal 2 is dry-distilled and separated. There is no need to add the recovered volatile component 9 to the modified coal 7 again, and all the volatile component 9 recovered by dry distillation can be used effectively for other purposes.
　したがって、本実施形態によれば、乾留して分離回収した揮発成分９を使用しなくても、自然発火を抑制することが低コストでできると共に、従来廃棄処分していた微粉炭３を有効利用することができるので、さらなる低コスト化を図ることができる。 Therefore, according to this embodiment, it is possible to suppress spontaneous ignition at a low cost without using the volatile component 9 separated and recovered by dry distillation, and effectively use the pulverized coal 3 that has been disposed of in the past. Therefore, further cost reduction can be achieved.
　また、先に説明したように、乾燥炭２中の揮発成分９の割合をＡとし、改質石炭７中の揮発成分９の割合をＢとしたときの、上記Ａに対する上記Ｂの割合（Ｂ／Ａ）が０．３～０．９となるように（０．３≦Ｂ／Ａ≦０．９・・・式（１））、特には０．５～０．７となるように（０．５≦Ｂ／Ａ≦０．７）、上記乾留炭５と上記微粉炭３との割合を調整して混合すると、自然発火を抑制できるだけではなく、改質石炭７の圧壊荷重を必要十分な大きさ（約５０ｋｇ前後）にすることができ、改質石炭７の取扱性を大幅に向上させることができる。 Further, as described above, when the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B, the ratio of B to the A (B / A) to be 0.3 to 0.9 (0.3 ≦ B / A ≦ 0.9 Formula (1)), in particular, to be 0.5 to 0.7 ( 0.5 ≦ B / A ≦ 0.7), and adjusting the ratio of the carbonized coal 5 and the pulverized coal 3 not only suppresses spontaneous ignition but also necessitates the crushing load of the modified coal 7 Can be made large (about 50 kg), and the handleability of the modified coal 7 can be greatly improved.
　さらに、微粉炭３の混合量によっては、乾留温度を可能な限り高く設定して乾留炭５中の揮発成分９を可能な限り分離回収することも可能となるので、他の用途に有効利用できる揮発成分９の量をさらに増加させることができる。 Furthermore, depending on the mixing amount of the pulverized coal 3, it is possible to separate and recover the volatile component 9 in the dry distillation coal 5 as much as possible by setting the dry distillation temperature as high as possible, so that it can be effectively used for other applications. The amount of the volatile component 9 can be further increased.
　なお、圧縮成形工程Ｓ４における圧縮成形温度Ｔｐは、乾留工程Ｓ２における乾留温度Ｔｄよりも低い（Ｔｐ＜Ｔｄ）方が好ましい。なぜなら、圧縮成形温度Ｔｐが乾留温度Ｔｄよりも高いと、圧縮成形の際に、揮発成分９が留去されて、改質石炭７中の揮発成分９の割合の低下を引き起こしてしまうおそれがあるからである。 The compression molding temperature Tp in the compression molding step S4 is preferably lower than the dry distillation temperature Td in the dry distillation step S2 (Tp <Td). This is because if the compression molding temperature Tp is higher than the dry distillation temperature Td, the volatile component 9 is distilled off during compression molding, which may cause a reduction in the proportion of the volatile component 9 in the modified coal 7. Because.
〈第二番目の実施形態〉
　本発明に係る改質石炭の製造方法の第二番目の実施形態を図２に基づいて説明する。ただし、前述した第一番目の実施形態の場合と同様な部分については、前述した第一番目の実施形態の説明で用いた符号と同様な符号を用いることにより、前述した第一番目の実施形態での説明と重複する説明を省略する。 <Second Embodiment>
A second embodiment of the method for producing modified coal according to the present invention will be described with reference to FIG. However, for the same parts as in the case of the first embodiment described above, the same reference numerals as those used in the description of the first embodiment described above are used, whereby the first embodiment described above is used. The description overlapping with the description in is omitted.
　本実施形態に係る改質石炭の製造方法は、図２に示すように、低品位石炭（低質炭）１を乾燥させて乾燥炭２を得る乾燥工程Ｓ１と、乾燥工程Ｓ１で得られた乾燥炭２を乾留して乾留炭５を得る乾留工程Ｓ２と、乾留工程Ｓ２で得られた乾留炭５と乾燥工程Ｓ１での乾燥に伴って発生して回収された微粉炭３と乾燥工程Ｓ１で乾燥される前に漏出して回収された漏出炭４とを混合する混合工程Ｓ１３と、混合工程Ｓ１３で混合された混合炭１６を圧縮成形して改質石炭７を得る圧縮成形工程Ｓ４とを行うものである。 As shown in FIG. 2, the method for producing modified coal according to the present embodiment is a drying step S <b> 1 in which low-grade coal (low quality coal) 1 is dried to obtain dry coal 2, and drying obtained in the drying step S <b> 1. In the carbonization step S2 for carbonizing the charcoal 2 to obtain the carbonization coal 5, the carbonization coal 5 obtained in the carbonization step S2, the pulverized coal 3 generated and recovered by drying in the drying step S1, and the drying step S1 A mixing step S13 for mixing the leaked coal 4 leaked and collected before being dried, and a compression molding step S4 for obtaining the modified coal 7 by compression molding the mixed coal 16 mixed in the mixing step S13. Is what you do.
　前記漏出炭４は、前記乾燥工程Ｓ１において、例えば、ベルトコンベア式等の熱風乾燥機等に供給する際に、当該乾燥機から漏出してしまい、完全に乾燥されることなく回収されたものであって、従来は廃棄処分されていたものである。 In the drying step S1, the leaked charcoal 4 leaks from the dryer when it is supplied to a hot air dryer such as a belt conveyor type, and is recovered without being completely dried. In the past, it was discarded.
　前記混合工程Ｓ１３は、前記乾燥工程Ｓ１で前記熱風から回収された微粉炭３と共に、当該乾燥工程Ｓ１で上記乾燥機から漏出して回収された漏出炭４を前記乾留炭５に混合する工程であり、上記微粉炭３及び上記漏出炭４を上記乾留炭５と共に混合機内へ供給して、均一に混ざるように攪拌することにより、混合炭１６を製造する。 The mixing step S13 is a step of mixing the pulverized coal 3 recovered from the hot air in the drying step S1 and the leaked coal 4 leaked and recovered from the dryer in the drying step S1 into the dry distillation coal 5. Yes, the coal pulverized coal 3 and the leaked coal 4 are supplied into the mixer together with the carbonized coal 5 and stirred so as to be mixed uniformly, thereby producing the coal mixture 16.
　このとき、先に説明したように、乾燥炭２中の揮発成分９の割合をＡとし、改質石炭７中の揮発成分９の割合をＢとすると、上記Ａに対する上記Ｂの割合（Ｂ／Ａ）が０．３～０．９となるように（０．３≦Ｂ／Ａ≦０．９・・・式（１））、特には０．５～０．７となるように（０．５≦Ｂ／Ａ≦０．７）、上記乾留炭５と上記微粉炭３と上記漏出炭４との割合を調整して混合すると好ましい。 At this time, as described above, assuming that the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B, the ratio of B to the A (B / A) is set to 0.3 to 0.9 (0.3 ≦ B / A ≦ 0.9 Formula (1)), and in particular, 0.5 to 0.7 (0 0.5 ≦ B / A ≦ 0.7), it is preferable to adjust and mix the ratio of the carbonized coal 5, the pulverized coal 3 and the leaked coal 4.
　なお、漏出炭４は、水８を含有するものの、当該水８が圧縮成形の際に蒸発してほとんどなくなるため、漏出炭４中の揮発成分９の割合は、含有する水８を控除した値、すなわち、乾燥炭２中の揮発成分９の割合（Ａ）と実質的にほとんど同一の値（Ａ）となる。 The leaked coal 4 contains water 8, but the water 8 evaporates during compression molding and almost disappears. Therefore, the ratio of the volatile component 9 in the leaked coal 4 is a value obtained by subtracting the contained water 8. That is, the value (A) is substantially the same as the ratio (A) of the volatile component 9 in the dry charcoal 2.
　そして、前記圧縮成形工程Ｓ４は、タール等の揮発成分９が分離除去されて非常に少なくなった乾留炭５に対して、タール等の揮発成分９をそのまま含有している微粉炭３及び漏出炭４を混合した混合炭１６を圧縮（１０００～２０００ｋｇ／ｃｍ2×３００～４００℃）して円柱状やタドン状等の固形のブリケットに成形することにより、改質石炭７を製造する。 In the compression molding step S4, the pulverized coal 3 and the leaked coal containing the volatile component 9 such as tar as it is with respect to the dry-distilled coal 5 in which the volatile component 9 such as tar is separated and removed. The mixed coal 16 mixed with 4 is compressed (1000 to 2000 kg / cm 2 × 300 to 400 ° C.) and formed into a solid briquette such as a cylindrical shape or a tadon shape, thereby producing the modified coal 7.
　このようにして製造された改質石炭７は、前述した実施形態の場合と同様に、微粉炭３中のタール等の揮発成分９を全体にまんべんなく含むように成形されていることから、成形物としての強度が高められつつ、自然発火が抑制される。 The reformed coal 7 produced in this way is molded so as to uniformly contain volatile components 9 such as tar in the pulverized coal 3 as in the case of the above-described embodiment. As a result, spontaneous ignition is suppressed.
　つまり、前述した実施形態においては、乾燥工程Ｓ１で回収されて今まで廃棄処分されていた、乾燥炭２と略同一の揮発成分９を含有する微粉炭３を乾留炭５に混合することにより、改質石炭７の自然発火の抑制等を図るようにしたが、本実施形態においては、乾燥工程Ｓ１で乾燥される前に漏出して今まで廃棄処分されていた、乾燥炭２と略同一の揮発成分９を含有する漏出炭４も回収して乾留炭５にさらに混合することにより、改質石炭７の自然発火の抑制等を図るようにしたのである。 That is, in the embodiment described above, by mixing the pulverized coal 3 containing the volatile component 9 substantially the same as the dry coal 2 recovered in the drying step S1 and disposed of up to now, into the dry distillation coal 5, Although suppression of the spontaneous combustion of the modified coal 7 was intended, in this embodiment, it is substantially the same as the dry coal 2 that has leaked before being dried in the drying step S1 and has been disposed of up to now. The leaked coal 4 containing the volatile component 9 is also recovered and further mixed with the dry distillation coal 5 to suppress spontaneous combustion of the modified coal 7.
　したがって、本実施形態によれば、前述した実施形態の場合と同様な効果を得ることができるのはもちろんのこと、今まで廃棄処分されていた漏出炭４もさらに有効利用して改質石炭７の自然発火の抑制等を図ることができるので、前述した実施形態よりもさらに低コスト化を図ることができる。 Therefore, according to the present embodiment, it is possible to obtain the same effect as in the case of the above-described embodiment, as well as to effectively use the leaked coal 4 that has been disposed of up to now, to improve the modified coal 7. Therefore, it is possible to further reduce the cost as compared with the above-described embodiment.
　また、先に説明したように、乾燥炭２中の揮発成分９の割合をＡとし、改質石炭７中の揮発成分９の割合をＢとしたときの、上記Ａに対する上記Ｂの割合（Ｂ／Ａ）が０．３～０．９となるように（０．３≦Ｂ／Ａ≦０．９・・・式（１））、特には０．５～０．７となるように（０．５≦Ｂ／Ａ≦０．７）、上記乾留炭５と上記微粉炭３と上記漏出炭４との割合を調整して混合すると、前述した実施形態の場合と同様に、自然発火を抑制できるだけではなく、改質石炭７の圧壊荷重を必要十分な大きさ（約５０ｋｇ前後）にすることができ、改質石炭７の取扱性を大幅に向上させることができる。 Further, as described above, when the ratio of the volatile component 9 in the dry coal 2 is A and the ratio of the volatile component 9 in the modified coal 7 is B, the ratio of B to the A (B / A) to be 0.3 to 0.9 (0.3 ≦ B / A ≦ 0.9 Formula (1)), in particular, to be 0.5 to 0.7 ( 0.5 ≦ B / A ≦ 0.7), and adjusting the ratio of the carbonized coal 5, the pulverized coal 3 and the leaked coal 4, spontaneous combustion is performed as in the case of the above-described embodiment. Not only can it be suppressed, but the crushing load of the modified coal 7 can be increased to a necessary and sufficient level (about 50 kg), and the handleability of the modified coal 7 can be greatly improved.
　本発明に係る改質石炭の製造方法は、乾留して分離回収した揮発成分を使用しなくても、自然発火を抑制することが低コストでできると共に、従来廃棄処分していた微粉炭を有効利用することができ、さらなる低コスト化を図ることができることから、産業上、極めて有益に利用することができる。 The method for producing modified coal according to the present invention can suppress spontaneous ignition at low cost without using volatile components separated and recovered by dry distillation, and effectively uses pulverized coal that has been disposed of in the past. Since it can be used and further cost reduction can be achieved, it can be used extremely beneficially industrially.
　１　低品位石炭（低質炭）
　２　乾燥炭
　３　微粉炭
　４　漏出炭
　５　乾留炭
　６，１６　混合炭
　７　改質石炭
　８　水
　９　揮発成分
　Ｓ１　乾燥工程
　Ｓ２　乾留工程
　Ｓ３，Ｓ１３　混合工程
　Ｓ４　圧縮成形工程 1 Low grade coal (low quality coal)
2 dry coal 3 pulverized coal 4 leaked coal 5 carbonized coal 6,16 mixed coal 7 modified coal 8 water 9 volatile components S1 drying step S2 dry distillation step S3, S13 mixing step S4 compression molding step

Claims (7)

  1. 　石炭を乾燥させて乾燥炭を得る乾燥工程と、
    　前記乾燥工程で得られた前記乾燥炭を乾留して乾留炭を得る乾留工程と、
    　前記乾留工程で得られた前記乾留炭と前記乾燥工程での乾燥に伴って発生して回収された微粉炭とを混合する混合工程と、
    　前記混合工程で混合された混合炭を圧縮成形して改質石炭を得る圧縮成形工程と
    　を行うことを特徴とする改質石炭の製造方法。     A drying step of drying the coal to obtain dry coal;
    A dry distillation step of carbonizing the dry coal obtained in the drying step to obtain dry distillation coal;
    A mixing step of mixing the dry distillation coal obtained in the dry distillation step and the pulverized coal generated and recovered along with the drying in the drying step;
    A method for producing modified coal, comprising: performing compression molding of the mixed coal mixed in the mixing step to obtain modified coal.
  2. 　請求項１に記載の改質石炭の製造方法において、
    　前記混合工程が、下記の条件式（１）を満たすように前記乾留炭と前記微粉炭との割合を調整して混合する工程である
    　ことを特徴とする改質石炭の製造方法。
    　０．３≦Ｂ／Ａ≦０．９　　　（１）
    　ただし、Ａは前記乾燥炭中の揮発成分の割合、Ｂは前記改質石炭中の揮発成分の割合である。     In the manufacturing method of the reformed coal according to claim 1,
    The said mixing process is a process of adjusting and mixing the ratio of the said carbonized coal and the said pulverized coal so that the following conditional expression (1) may be satisfy | filled. The manufacturing method of the modified coal characterized by the above-mentioned.
    0.3 ≦ B / A ≦ 0.9 (1)
    However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
  3. 　請求項１に記載の改質石炭の製造方法において、
    　前記混合工程が、前記乾燥工程で乾燥される前に漏出して回収された漏出炭をさらに混合する工程である
    　ことを特徴とする改質石炭の製造方法。     In the manufacturing method of the reformed coal according to claim 1,
    The said mixing process is a process of further mixing the leaked coal which leaked and collect | recovered before it was dried at the said drying process. The manufacturing method of the modified coal characterized by the above-mentioned.
  4. 　請求項３に記載の改質石炭の製造方法において、
    　前記混合工程が、下記の条件式（１）を満たすように前記乾留炭と前記微粉炭と前記漏出炭との割合を調整して混合する工程である
    　ことを特徴とする改質石炭の製造方法。
    　０．３≦Ｂ／Ａ≦０．９　　　（１）
    　ただし、Ａは前記乾燥炭中の揮発成分の割合、Ｂは前記改質石炭中の揮発成分の割合である。     In the manufacturing method of the reformed coal according to claim 3,
    The said mixing process is a process of adjusting and mixing the ratio of the said carbonized coal, the said pulverized coal, and the said leaked coal so that the following conditional expression (1) may be satisfy | filled. The manufacturing method of the modified coal characterized by the above-mentioned. .
    0.3 ≦ B / A ≦ 0.9 (1)
    However, A is the ratio of the volatile component in the dry coal, and B is the ratio of the volatile component in the modified coal.
  5. 　請求項１から請求項４のいずれか一項に記載の改質石炭の製造方法において、
    　前記圧縮成形工程における圧縮成形温度が、前記乾留工程における乾留温度よりも低い
    　ことを特徴とする改質石炭の製造方法。     In the manufacturing method of the modified coal as described in any one of Claims 1-4,
    A method for producing modified coal, wherein a compression molding temperature in the compression molding step is lower than a dry distillation temperature in the dry distillation step.
  6. 　請求項１から請求項５のいずれか一項に記載の改質石炭の製造方法において、
    　前記微粉炭が、平均粒径２００μｍ以下のものである
    　ことを特徴とする改質石炭の製造方法。     In the manufacturing method of the modified coal as described in any one of Claims 1-5,
    The said pulverized coal is a thing with an average particle diameter of 200 micrometers or less. The manufacturing method of the modified coal characterized by the above-mentioned.
  7. 　請求項１から請求項６のいずれか一項に記載の改質石炭の製造方法において、
    　前記石炭が、低品位石炭である
    　ことを特徴とする改質石炭の製造方法。     In the manufacturing method of the modified coal as described in any one of Claims 1-6,
    The said coal is low grade coal. The manufacturing method of the modified coal characterized by the above-mentioned.
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KR20160032046A (en) 2013-05-30 2016-03-23 클린 콜 테크놀로지스, 아이엔씨. Treatment of coal

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