Abstract: Provided is a regeneration device for heating a treatment liquid in a phase-separated state due to absorption of an acidic compound to release the acidic compound and regenerate the treatment liquid. The regeneration device includes a container for storing the treatment liquid, and a first wall that partitions a space in the container into a first space and a second space. The first space includes: a heating region that receives the treatment liquid supplied from an outside of the container and in which a heating unit for heating the treatment liquid is disposed; and a static region that receives the treatment liquid from the heating region, the treatment liquid having released the acidic compound by being heated by the heating unit. The second space allows the treatment liquid having released the acidic compound to be discharged. The first wall is provided with an opening through which the treatment liquid in the static region flows into the second space.

Abstract: Provided is a gas-treating device including: an absorption device that receives an absorbent to absorb an acidic compound in a gas to be treated into the absorbent; a release device into which the absorbent having absorbed the acidic compound in the absorption device is introduced; a heater for heating the absorbent in the release device to release the acidic compound contained in the absorbent from the absorbent; and a multi-fluid heat exchanger for heating the absorbent before being supplied from the absorption device to the release device by a fluid containing the acidic compound discharged from the release device and the absorbent before being supplied from the release device to the absorption device.

Abstract: A method for producing refined-coal has steps of (A) heating a mixture including moisture-containing coal and oil, to dehydrate the coal; (B) removing, in a first mist separator having plural baffle plates disposed in parallel, fine particles accompanying vapor generated by the dehydration step and adhered to the surface of the a first mist separator by spraying a liquid at a temperature of 50 ° C. or above and 150 ° C. or below in the first mist separator, which temperature is lower than a temperature to which the mixture is heated in step (A), wherein the sprayed liquid includes an oil component; and (C) compressing the vapor to obtain high-temperature vapor. In the step (B), the vapor is made to sequentially pass through the first mist separator and a second mist separator of a mesh type, while spraying liquid onto the first mist separator through which the vapor passes firstly.

Abstract: Provided is a method that produces a solid fuel having a relatively high strength from a powder fuel. The method includes: blending a coal-derived powder fuel with a pulverized fuel having a greater mean particle diameter than the coal-derived powder fuel to obtain a mixture; compression-molding the mixture to obtain a solid fuel; and pulverizing a part of the solid fuel, in which the part of the pulverized solid fuel is used as the pulverized fuel in the blending. A blending proportion of the pulverized fuel with respect to the blending mixture is preferably at least 5 mass % and at most 50 mass %. A cohesive fine coal having a superior cohesive property to the coal-derived powder fuel is preferably further blended in the blending. A blending proportion of the cohesive fine coal with respect to the blending mixture is preferably at least 5 mass % and at most 30 mass %.

Abstract: A method for storing a modified coal includes a pile forming step of forming a pile by stacking a blended coal of an agglomerate-shaped coal and a powdery modified coal. The modified coal has a content of particles having a particle diameter of 2 mm or less of 35% by mass or more. The pile formed in the pile forming step has a packing density of 1.0 g/cm3 or more.

Abstract: A process for producing a modified coal from a coal of low-rank as a raw material includes dehydrating the coal, adding water to the dehydrated coal, agglomerating the water-added coal, and gradually oxidizing the agglomerated coal. In the water addition, an added amount of the water is regulated so that the water-added coal has a water content of 5% by mass or more and 20% by mass or less. In the oxidation, the agglomerated coal is held in an air at a temperature of 70° C. or more and 105° C. or less.

Abstract: A method for producing modified coal using coal of a low grade comprising: adding water for preventing any dust generation to the dewatered coal; an addition amount of the water is adjusted for a water content rate of the water-added coal to be 6% by mass or more to 16% by mass or less; agglomerating the water-added coal; slowly oxidizing the agglomerated coal; and crushing the oxidized coal.

Abstract: A method for storing upgraded coal, which is economical and whereby it becomes possible to prevent the spontaneous ignition of piles; and grain-size-controlled coal which rarely undergoes spontaneous ignition during storage. The method for storing upgraded coal includes piling up granular coal containing upgraded coal, wherein the content of grains each having a grain size of 10 mm or less in the coal is 50 mass % or more. It is preferred that the content of grains each having a grain size of 1 mm or less is 25 mass % or more and the content of grains each having a grain size of 0.15 mm or less is 7 mass % or more in the coal.

Abstract: A method of manufacturing a molded solid fuel including: a pulverization for pulverizing low-grade coal; a mixing for obtaining a slurry by mixing the pulverized low-grade coal and a solvent oil; a dehydration for obtaining a dehydrated slurry by heating and dehydrating the slurry; a solid-liquid separation for obtaining a cake by separating the solvent oil from the dehydrated slurry; a drying for obtaining powdery modified coal by heating the cake and further separating the solvent oil from the cake; and a molding for pressurizing and molding the powdery modified coal by using a molding machine, without the addition/mixture of a binder. In the molding, a coolant is sprayed onto the surface of the molding machine, and the surface temperature of the molding machine is kept equal to or below 100° C.

Abstract: A method for producing a briquetted solid fuel includes pulverizing a low-rank coal. The pulverized low-rank coal is mixed with a solvent oil to give a slurry. The slurry is heated and dewatered to give a dewatered slurry. The solvent oil is separated from the dewatered slurry to give a cake. The cake is heated to further separate the solvent oil from the cake to thereby give a refined coal in powder form. The refined coal is combined with a property-controlling coal in powder form having, as properties, a loose bulk density of 0.6 kg/L or more and an angle of repose of 40° or less, to give a briquetting feedstock containing the property-controlling coal in an amount of 5 to 70 mass percent based on the total mass of the briquetting feedstock. The briquetting feedstock is briquetted under pressure to give the briquetted solid fuel in briquette form.

Abstract: A method for storing a modified coal includes a pile forming step of forming a pile by stacking a blended coal of an agglomerate-shaped coal and a powdery modified coal. The modified coal has a content of particles having a particle diameter of 2 mm or less of 35% by mass or more. The pile formed in the pile forming step has a packing density of 1.0 g/cm3 or more.

Abstract: A process for producing a modified coal from a coal of low-rank as a raw material includes dehydrating the coal, adding water to the dehydrated coal, agglomerating the water-added coal, and gradually oxidizing the agglomerated coal. In the water addition, an added amount of the water is regulated so that the water-added coal has a water content of 5% by mass or more and 20% by mass or less. In the oxidation, the agglomerated coal is held in an air at a temperature of 70° C. or more and 105° C. or less.

Abstract: A method for producing modified coal using coal of a low grade comprising: adding water for preventing any dust generation to the dewatered coal; an addition amount of the water is adjusted for a water content rate of the water-added coal to be 6% by mass or more to 16% by mass or less; agglomerating the water-added coal; slowly oxidizing the agglomerated coal; and crushing the oxidized coal.

Abstract: A method for producing a briquetted solid fuel includes pulverizing a low-rank coal. The pulverized low-rank coal is mixed with a solvent oil to give a slurry. The slurry is heated and dewatered to give a dewatered slurry. The solvent oil is separated from the dewatered slurry to give a cake. The cake is heated to further separate the solvent oil from the cake to thereby give a refined coal in powder form. The refined coal is combined with a property-controlling coal in powder form having, as properties, a loose bulk density of 0.6 kg/L or more and an angle of repose of 40° or less, to give a briquetting feedstock containing the property-controlling coal in an amount of 5 to 70 mass percent based on the total mass of the briquetting feedstock. The briquetting feedstock is briquetted under pressure to give the briquetted solid fuel in briquette form.

Abstract: A method of manufacturing a molded solid fuel including: a pulverization for pulverizing low-grade coal; a mixing for obtaining a slurry by mixing the pulverized low-grade coal and a solvent oil; a dehydration for obtaining a dehydrated slurry by heating and dehydrating the slurry; a solid-liquid separation for obtaining a cake by separating the solvent oil from the dehydrated slurry; a drying for obtaining powdery modified coal by heating the cake and further separating the solvent oil from the cake; and a molding for pressurizing and molding the powdery modified coal by using a molding machine, without the addition/mixture of a binder. In the molding, a coolant is sprayed onto the surface of the molding machine, and the surface temperature of the molding machine is kept equal to or below 100° C.

Abstract: A method for storing upgraded coal, which is economical and whereby it becomes possible to prevent the spontaneous ignition of piles; and grain-size-controlled coal which rarely undergoes spontaneous ignition during storage. The method for storing upgraded coal includes piling up granular coal containing upgraded coal, wherein the content of grains each having a grain size of 10 mm or less in the coal is 50 mass % or more. It is preferred that the content of grains each having a grain size of 1 mm or less is 25 mass % or more and the content of grains each having a grain size of 0.15 mm or less is 7 mass % or more in the coal.

Abstract: The purpose of the present invention is to provide a refined-coal production method and a refined-coal production device, which exhibit excellent operability, and with which droplets accompanying steam generated when dehydrating moisture-containing coal is efficiently removed. This refined-coal production method is provided with: a step (A) in which a mixture including moisture-containing coal and oil is heated to dehydrate the coal; a step (B) in which droplets accompanying steam generated by performing dehydration are removed; and a step (C) in which steam, having had the droplets removed therefrom, is compressed to obtain high-temperature steam. The refined-coal production method is characterized in that, in step (B), the steam is sequentially passed through one or a plurality of mist separators, and removal of the droplets is performed while liquid is being sprayed onto a first mist separator through which the steam passes firstly.

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: Modified solid fuel manufacturing method and modified solid fuels manufactured using the manufacturing method. When solid fuels are manufactured by crushing low grade coal, mixing the crushed low grade coal with solvent oil to prepare a slurry, heating the slurry to at least the boiling point of water to evaporate moisture included in the slurry, separating the solvent oil from the slurry to produce charcoal dust and compression compacting said charcoal dust, by heating the slurry to at least the boiling point of water, the non-volatile components included in the low grade coal are extracted with the solvent oil, the outer surface of the low grade coal and the internal surfaces of the pores are coated with the extracted non-volatile components, and the content of heavy oil added from the outside will be less than 0.5 mass %, relative to the solid fuel after drying.

Abstract: Modified solid fuel manufacturing method and modified solid fuels manufactured using the manufacturing method. When solid fuels are manufactured by crushing low grade coal, mixing the crushed low grade coal with solvent oil to prepare a slurry, heating the slurry to at least the boiling point of water to evaporate moisture included in the slurry, separating the solvent oil from the slurry to produce charcoal dust and compression compacting said charcoal dust, by heating the slurry to at least the boiling point of water, the non-volatile components included in the low grade coal are extracted with the solvent oil, the outer surface of the low grade coal and the internal surfaces of the pores are coated with the extracted non-volatile components, and the content of heavy oil added from the outside will be less than 0.5 mass % relative to the solid fuel after drying.