Abstract: An apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, includes a mixing vessel 1 in which an oil containing a solvent oil is mixed with a coal to prepare a raw material slurry; evaporators 2 and 3 that evaporate moisture from the raw material slurry; a solid-liquid separator that performs solid-liquid separation on the slurry from which moisture has been evaporated; and an element that adds a heavy oil to the slurry after the completion of or in the course of evaporating moisture.

Abstract: An apparatus for producing a solid fuel which may be made by a method involving mixing porous coal with a mixed oil containing heavy oil and solvent oil to prepare a raw material slurry; heating the raw material slurry to promote dehydration of the porous coal while impregnating the mixed oil into pores of the porous coal to obtain a dehydrated slurry; separating the resulting upgraded porous coal and mixed oil from the dehydrated slurry; drying the separated upgraded porous coal with carrier gas, and subsequently condensing vaporized mixed oil in the carrier gas by cooling, while capturing the porous coal in the carrier gas by atomization of the condensed mixed oil, thereby recovering the mixed oil; and returning the mixed oil separated and recovered in the separating to the mixing, further involving supplying the mixed oil recovered in the final drying to the separating.

Abstract: The present invention provides an indirect heat-drying apparatus that is resistant to adhesion of the substance to be dried on heating pipes and gives a product having a desired and stabilized liquid content. The present invention relates to an indirect heat-drying apparatus, comprising two indirect-heating rotary dryers, i.e., the first and second indirect-heating rotary dryers that are arranged in series so that the dried substance from the first indirect-heating rotary dryer is supplied to and dried in the second indirect-heating rotary dryer as the substance to be dried; and a carrier gas-supplying means of supplying the carrier gas co-currently in the first indirect-heating rotary dryer and counter-currently in the second indirect-heating rotary dryer, with respect to the flow direction from the substance to be dried.

Abstract: An apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, includes a mixing vessel 1 in which an oil containing a solvent oil is mixed with a coal to prepare a raw material slurry; evaporators 2 and 3 that evaporate moisture from the raw material slurry; a solid-liquid separator that performs solid-liquid separation on the slurry from which moisture has been evaporated; and an element that adds a heavy oil to the slurry after the completion of or in the course of evaporating moisture.

Abstract: The present invention provides a process and an apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, in which the amount of heavy oil added can be reduced. A solid fuel production process includes the steps of mixing an oil containing a solvent oil with a coal to prepare a raw material slurry; evaporating moisture from the raw material slurry; subsequently performing solid-liquid separation on the slurry to yield a solid fuel; and adding a heavy oil to the slurry after the completion of or in the course of evaporating moisture.

Abstract: An apparatus for producing a solid fuel which may be made by a method involving mixing porous coal with a mixed oil containing heavy oil and solvent oil to prepare a raw material slurry; heating the raw material slurry to promote dehydration of the porous coal while impregnating the mixed oil into pores of the porous coal to obtain a dehydrated slurry; separating the resulting upgraded porous coal and mixed oil from the dehydrated slurry; drying the separated upgraded porous coal with carrier gas, and subsequently condensing vaporized mixed oil in the carrier gas by cooling, while capturing the porous coal in the carrier gas by atomization of the condensed mixed oil, thereby recovering the mixed oil; and returning the mixed oil separated and recovered in the separating to the mixing, further involving supplying the mixed oil recovered in the final drying to the separating.

Abstract: (Problems) Providing a method and an apparatus for producing a solid fuel, capable of suppressing increase in dust coal concentration in circulating oil.

Abstract: The present invention provides an indirect heat-drying apparatus that is resistant to adhesion of the substance to be dried on heating pipes and gives a product having a desired and stabilized liquid content. The present invention relates to an indirect heat-drying apparatus, comprising two indirect-heating rotary dryers, i.e., the first and second indirect-heating rotary dryers that are arranged in series so that the dried substance from the first indirect-heating rotary dryer is supplied to and dried in the second indirect-heating rotary dryer as the substance to be dried; and a carrier gas-supplying means of supplying the carrier gas co-currently in the first indirect-heating rotary dryer and counter-currently in the second indirect-heating rotary dryer, with respect to the flow direction from the substance to be dried.

Abstract: (Problems) Providing a method and an apparatus for producing a solid fuel, capable of suppressing increase in dust coal concentration in circulating oil.

Abstract: An apparatus for producing solid fuel includes a passage for introducing a supernatant in a mixing tank into a portion between the bottom of the mixing tank and a first slurry pump of a first slurry circulating passage using a third pump, and a passage for introducing a supernatant in an evaporator into a portion between the bottom of the evaporator and a second slurry pump of a second slurry circulating passage using a fourth pump. A method for producing a solid fuel includes introducing a supernatant in a mixing tank into a first slurry circulating passage, for washing a portion where coal deposits, and introducing a supernatant in an evaporator into a second slurry circulating passage, for washing a portion where coal deposits.

Abstract: The present invention provides a process and an apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, in which the amount of heavy oil added can be reduced. A solid fuel production process includes the steps of mixing an oil containing a solvent oil with a coal to prepare a raw material slurry; evaporating moisture from the raw material slurry; subsequently performing solid-liquid separation on the slurry to yield a solid fuel; and adding a heavy oil to the slurry after the completion of or in the course of evaporating moisture.

Abstract: A method for manufacturing a solid fuel includes the steps of partially or completely separating finely powdered coal from pulverized low-rank coal; mixing the separated low-rank coal with a mixed oil containing a heavy oil and a solvent oil to produce an untreated slurry; heating the untreated slurry to dehydrate the low-rank coal and filling the pores of the low-rank coal with the mixed oil; and separating the solid fuel from the heated slurry by solid-liquid separation. The manufacturing method further includes the step of adding the finely powdered coal separated from the low-rank coal to the solid fuel produced by the solid-liquid separation of the heated slurry. The finely powdered coal separated from the low-rank coal has an average particle size of 0.5 mm or less. An apparatus for the manufacturing method is also disclosed.

Abstract: Disclosed herein is an economical method for efficiently drying the plant-derived biomass for which there has been no established method for disposal and reuse. This drying method does not impair the value of plant-derived biomass as a fuel. Disclosed also herein is a method for producing a biomass fuel from the plant-derived biomass which has been dried by the aforesaid method. The drying method consists of dehydrating (drying) plant-derived biomass in oil with heating and modifying it simultaneously. Drying in this way partly decomposes the plant-derived biomass, thereby yielding a good constituent for biomass fuel.

Abstract: A raw material slurry in which a coal is mixed with a mixed oil containing a heavy oil and a solvent oil is subjected to a water vaporization treatment with a vaporizer, and is subjected to solid-liquid separation with a mechanical solid-liquid separator. A separated solid is heated with a dryer while a carrier gas is flown, so as to vaporize the oil and produce a solid fuel. The carrier gas is fed to a cooler through a pipe, and the above-described vaporization oil is condensed and recovered. In a method and an apparatus for manufacturing a solid fuel, an occurrence of blocking in a pipe between the above-described dryer and the cooler can be prevented. An oil is flown on an inner wall surface of the pipe in the neighborhood of a cooler inlet portion with respect to the pipe between the dryer and the cooler.

Abstract: An apparatus for producing solid fuel includes a passage for introducing a supernatant in a mixing tank into a portion between the bottom of the mixing tank and a first slurry pump of a first slurry circulating passage using a third pump, and a passage for introducing a supernatant in an evaporator into a portion between the bottom of the evaporator and a second slurry pump of a second slurry circulating passage using a fourth pump. A method for producing a solid fuel includes introducing a supernatant in a mixing tank into a first slurry circulating passage, for washing a portion where coal deposits, and introducing a supernatant in an evaporator into a second slurry circulating passage, for washing a portion where coal deposits.

Abstract: A method for manufacturing a solid fuel includes the steps of partially or completely separating finely powdered coal from pulverized low-rank coal; mixing the separated low-rank coal with a mixed oil containing a heavy oil and a solvent oil to produce an untreated slurry; heating the untreated slurry to dehydrate the low-rank coal and filling the pores of the low-rank coal with the mixed oil; and separating the solid fuel from the heated slurry by solid-liquid separation. The manufacturing method further includes the step of adding the finely powdered coal separated from the low-rank coal to the solid fuel produced by the solid-liquid separation of the heated slurry. The finely powdered coal separated from the low-rank coal has an average particle size of 0.5 mm or less. An apparatus for the manufacturing method is also disclosed.

Abstract: Disclosed herein is an economical method for efficiently drying the plant-derived biomass for which there has been no established method for disposal and reuse. This drying method does not impair the value of plant-derived biomass as a fuel. Disclosed also herein is a method for producing a biomass fuel from the plant-derived biomass which has been dried by the aforesaid method.

Abstract: A method of producing coal briquette at a low energy cost by saving heating step or drying step for fine coal, which comprises adding and mixing from 1 to 10 mass parts of powdery starch to a coal having 15 mass % or more of water content and comprising 50 mass % or more of particles with grain size of 5 mm or less to form 100 mass parts of a mixture, and coating the surface of the briquette product with 0.1 to 5 mass parts of a heavy oil component simultaneously with or after pressure briquetting the mixture by a double roll briquetting machine in which concaves are formed on the roll surface, as well as coal briquette which is inexpensive and has high strength and high waterproof.

Abstract: A method of producing coal briquette at a low energy cost by saving heating step or drying step for fine coal, which comprises adding and mixing from 1 to 10 mass parts of powdery starch to a coal having 15 mass % or more of water content and comprising 50 mass % or more of particles with grain size of 5 mm or less to form 100 mass parts of a mixture, and coating the surface of the briquette product with 0.1 to 5 mass parts of a heavy oil component simultaneously with or after pressure briquetting the mixture by a double roll briquetting machine in which concaves are formed on the roll surface, as well as coal briquette which is inexpensive and has high strength and high waterproof.

Abstract: A solid fuel in which an oil mixture containing a heavy oil fraction and a solvent fraction is incorporated in fine pores of a porous coal. The improved porous coal is produced by mixing an oil mixture containing a heavy oil fraction and a solvent fraction with a porous coal to obtain a starting slurry, heating the starting slurry to dewater the porous coal, and incorporate, at the same time, the oil mixture into the fine pores of the porous coal and then subjecting the treated slurry to solid-liquid separation.