Abstract: A coal upgrade plant includes: a dryer 1 that heats and dries coal before pyrolyzing the coal; a scrubber 32 that treats a carrier gas discharged from the dryer 1 while catching a desorbed component desorbed from the coal when the coal is dried by the dryer 1; a waste water treatment equipment 40 that treats waste water collected from the scrubber 32; and the scrubber 32 that uses recycled water treated in the waste water treatment equipment 40. Thus, water supplied to the coal upgrade plant from outside can be reduced as much as possible.

Abstract: A coal upgrade plant includes: a dryer 1 that dries coal; a pyrolyzer 3 that pyrolyzes the coal dried by the dryer 1; a quencher 5 that cools the coal pyrolyzed by the pyrolyzer 3; a finisher 7 that deactivates the coal cooled by the quencher 5; and cyclones 28 and 94 that collect pulverized coal generated from the coal, wherein the pulverized coal collected by the cyclones 28 and 94 is fed to an absorber fed to a scrubber 32 that treats a flue gas. Thus, the mercury generated from the coal upgrade plant can be removed.

Abstract: A coal upgrade plant includes a dryer 1 that heats and dries coal before pyrolyzing the coal, and a scrubber 32 that treats a carrier gas discharged from the dryer 1 while catching a desorbed component desorbed from the coal when the coal is dried by the dryer 1. The coal upgrade plant further includes a carrier gas circulation path 22 that guides the carrier gas treated by the scrubber 32 to the dryer 1. A cyclone 28 is also provided on the upstream side of the scrubber 32. Thus, mercury and/or mercury-based substances generated in the dryer 1 can be removed.

Abstract: A pyrolyzed coal quencher includes: a first water spray tube 79 that sprays water on pyrolyzed coal having a temperature of 300° C. or more obtained after pyrolyzing coal; a first cooling tube 80 that performs indirect cooling on the pyrolyzed coal obtained after spraying water by the first water spray tube 79 to a temperature of 100° C. or more; a second water spray tube 82 that sprays water on the pyrolyzed coal cooled by the first cooling tube 80 such that the pyrolyzed coal has a desired water content; and a second cooling tube 83 that performs indirect cooling on the pyrolyzed coal cooled by the first cooling tube 80 to a desired temperature of less than 100° C. Thus, the pyrolyzed coal can be promptly cooled and adjusted to a desired water content.

Abstract: To provide a pyrolyzed coal finisher capable of deactivating pyrolyzed coal within a short time without causing a cost increase. A pyrolyzed coal finisher includes: a mixer 86 that forms slurry by mixing particulate pyrolyzed coal that is pyrolyzed coal into a chemical solution having an oxygen blocking function after being solidified; and a belt filter device 88 that filters the slurry formed in the mixer 86 in a state in which each particle of the pyrolyzed coal is coated with the chemical solution. The pyrolyzed coal finisher further includes a chemical solution circulation path 94 that guides the chemical solution separated from the pyrolyzed coal by the belt filter device 88 to the mixer 86.

Abstract: A flue gas heat recovery system includes a furnace, a combustion device, a flue gas duct, and a heat exchanging unit, and further includes a heat recovering unit disposed in the flue gas duct on the downstream side of the heat exchanging unit to recover heat from flue gas, and configured such that a path cross-sectional area of an outlet of the heat recovering unit is made smaller than a path cross-sectional area of an inlet of the heat recovering unit, and a first heat exchanger that heats combustion air by using heat recovered by the heat recovering unit.

Abstract: Coal is properly dried and the efficiency of a boiler is increased while suppressing any reduction in efficiency of the boiler and the generation of hydrocarbon gas components. Employed are a coal dryer that dries coal, a boiler in which the coal that is dried in the coal dryer is mixed with air for combustion and burned, an air heater that heats the air for combustion that is supplied to the boiler using combustion exhaust gas discharged from the boiler, a precipitator that collects dust included in the combustion exhaust gas, a desulfurization plant that performs a desulfurization process on the combustion exhaust gas, and heat recovery equipment that heats a heating medium using the combustion exhaust gas. The coal dryer dries the coal using the heat energy of the heating medium that has been heated in the heat recovery equipment.

Abstract: A wet type flue-gas desulfurization apparatus includes a desulfurization apparatus main body; a gas introducing unit that is disposed on a side wall of the desulfurization apparatus main body and that introduces a flue gas; an absorbent accumulating unit that accumulates an absorbent which has absorbed the sulfur oxide present in the flue gas; a circulation line that circulates the absorbent from the absorbent circulating unit; a spray pipe that is disposed in the vicinity of the middle portion of the desulfurization apparatus main body and that sprays the absorbent, which is circulated in the circulation line, as a spray liquid from a nozzle; an ORP meter that measures the oxidation reduction potential of the absorbent; and an oxidation resistant pipe group that, in the vicinity of the interface of the absorbent present in the absorbent accumulating unit, cushions a falling liquid falling from an absorber of the absorbent.

Abstract: A wet type flue-gas desulfurization apparatus includes a desulfurization apparatus main body; a gas introducing unit that is disposed on a side wall of the desulfurization apparatus main body and that introduces a flue gas; an absorbent accumulating unit that accumulates an absorbent which has absorbed the sulfur oxide present in the flue gas; a circulation line that circulates the absorbent from the absorbent circulating unit; a spray pipe that is disposed in the vicinity of the middle portion of the desulfurization apparatus main body and that sprays the absorbent, which is circulated in the circulation line, as a spray liquid from a nozzle; an ORP meter that measures the oxidation reduction potential of the absorbent; and an oxidation resistant pipe group that, in the vicinity of the interface of the absorbent present in the absorbent accumulating unit, cushions a falling liquid falling from an absorber of the absorbent.

Abstract: There is provided an exhaust gas treatment system including a CO2 recovery unit with further enhanced energy efficiency. The exhaust gas treatment system (1) includes: a CO2 recovery unit (10) including a CO2 absorption column (11), an absorbing solution regeneration column (16), a condensate supply pipeline (15) for supplying condensate, which contains CO2 absorbing solution discharged from the CO2 absorption column (11) to a bottom portion of the absorbing solution regeneration column (16), and a CO2 separation section (22) for performing heat exchange, via a heat exchanger (23), between the CO2 discharged from the absorbing solution regeneration column (16) and the condensate; and an exhaust gas heat exchanger (5) provided on a gas upstream side of the CO2 recovery unit (10) for performing heat exchange between exhaust gas before flowing into the CO2 recovery unit (10) and the condensate.

Abstract: An apparatus for separating and recovering CO2 from a CO2 absorbent, includes: a regeneration tower for regenerating the absorbent that has absorbed CO2 by heating it to separate and remove CO2 therefrom and to exhaust CO2 gas; a compressor for compressing the CO2 gas exhausted from the tower; and a heat exchanger for heating the absorbent in the tower by exchanging heat with a part of the compressed CO2 by the compressor which is introduced into the tower. The apparatus may include a plurality of the compressors and a plurality of the heat exchangers. The plurality of compressors is arranged in series to sequentially compress the CO2 gas exhausted from the tower. The plurality of heat exchangers is configured so that each part of the CO2 compressed by the plurality of compressors is introduced to the tower in parallel to exchange heat with the absorbent in the tower.

Abstract: A power generation system using low-grade coal includes a low-grade coal refining facility that heats the low-grade coal to refine the low-grade coal into high-grade coal, a CO2 recovery facility that recovers CO2 from an exhaust gas generated by refining the low-grade coal in the low-grade coal refining facility, while using steam generated by refining the low-grade coal in the low-grade coal refining facility, and a power generation facility that performs the power generation using, as fuel, the high-grade coal obtained by refining the low-grade coal in the low-grade coal refining facility.

Abstract: A CO2 recovery system includes an absorption apparatus that brings a CO2 absorption liquid into contact with an exhaust gas treated by a pre-treatment apparatus so that CO2 in the exhaust gas is absorbed into the CO2 absorption liquid; a regeneration apparatus that separates CO2 from the CO2 absorption liquid; an absorption liquid circulation path that circulates the CO2 absorption liquid between the absorption apparatus and the regeneration apparatus; and an impurity removal unit that removes impurities having a high concentration in the absorption liquid circulation path, in the absorption liquid circulation path and/or in the pre-treatment apparatus in advance.

Abstract: A CO2 recovery system and a CO2 recovery method include an absorption apparatus that causes CO2 in an exhaust gas to be absorbed by CO2 absorption liquid, a regeneration apparatus that heats the CO2 absorption liquid to separate CO2; a CO2 compression mechanism of a first turbine driving mechanism that is driven in conjunction with a first steam turbine to compress separated CO2, a reheating boiler that supplies LP steam exhausted from the first steam turbine in order to heat the CO2 absorption liquid, an auxiliary boiler that heats condensed water of the LP steam after the CO2 absorption liquid is heated to generate HP steam and supplies the HP steam to the first steam turbine, and a second turbine driving mechanism that supplies the HP steam generated in the auxiliary boiler to a second steam turbine and is driven in conjunction with the second steam turbine.

Abstract: An exhaust gas treatment system includes a CO2 recovery apparatus that recovers CO2 from an exhaust gas exhausted from a boiler or a turbine, a VOC removal apparatus that removes a VOC from the exhaust gas after the exhaust gas is treated by the CO2 recovery apparatus, a heating device that heats the exhaust gas after the exhaust gas is treated by the CO2 recovery apparatus and before the exhaust gas is treated by the VOC removal apparatus, and a cooling device that cools the exhaust gas after the exhaust gas is treated by the VOC removal apparatus.

Abstract: The present invention provides a method for removing mercury in exhaust gas, in which mercury in exhaust gas discharged from combustion equipment is removed, characterized by including a mercury oxidation process in which mercury in the exhaust gas is converted to mercury chloride in the presence of a catalyst; a contact process in which the exhaust gas is brought into contact with an absorbing solution in a scrubber to absorb and remove mercury components from the exhaust gas; and a control process in which blowing of air or addition of an oxidizing agent into the scrubber is accomplished, and the amount of blown air or the added amount of oxidizing agent is regulated to control the oxidation-reduction potential of the absorbing agent, and a system for removing mercury in exhaust gas. According to the mercury removing method in accordance with the present invention, a phenomenon that mercury chloride is reduced into metallic mercury by SO2 etc.

Abstract: A flue gas treatment system and a flue gas treatment method capable of drastically reducing operating cost and an amount of waste water and capable of controlling an amount of a NOx reducing agent and a mercury oxidation agent to be supplied are provided. The flue gas treatment system sprays an aqueous solution containing ammonium halide into a flue, reduces NOx and oxidizes mercury in a deNOx section, and removes SOx and the mercury in a desulfurization section. The flue gas treatment system adds at least one of ammonium sulfate and ammonium carbonate to waste water which is discharged from the desulfurization section and from which CaSO4 is separated to generate the ammonium halide. The waste water containing the ammonium halide is sprayed as the aqueous solution.

Abstract: A desulfurization apparatus includes: a desulfurization section (3) that brings exhaust gas containing sulfur oxide into gas-liquid contact with absorbing liquid to thereby remove the sulfur oxide; a folded-plate type demister (4) that is installed above the desulfurization section (3), and removes mist generated in the desulfurization section (3); a packing section (5) that is installed above the folded-plate type demister (4), has a same cross-sectional area as the desulfurization section (3) and the folded-plate type demister (4), and removes mist that is not removed by the folded-plate type demister (4); and a washing section (6) that injects water to the packing section (5). As a result of this, mist contained in the exhaust gas is easily and reliably reduced.

Abstract: Coal is properly dried and the efficiency of a boiler is increased while suppressing any reduction in efficiency of the boiler and the generation of hydrocarbon gas components. Employed are a coal dryer that dries coal, a boiler in which the coal that is dried in the coal dryer is mixed with air for combustion and burned, an air heater that heats the air for combustion that is supplied to the boiler using combustion exhaust gas discharged from the boiler, a precipitator that collects dust included in the combustion exhaust gas, a desulfurization plant that performs a desulfurization process on the combustion exhaust gas, and heat recovery equipment that heats a heating medium using the combustion exhaust gas. The coal dryer dries the coal using the heat energy of the heating medium that has been heated in the heat recovery equipment.

Abstract: A heat recovery system includes a preheater (4) in which heat exchange is performed between condensed water generated in a condenser (3) and CO2 in a CO2 recovery apparatus, a gas heater (5) in which heat exchange is performed between the condensed water heated in the preheater (4) and exhaust gas discharged from a boiler (7) and the boiler (7) to which the condensed water heated in the gas heater (5) is supplied as boiler supply water. With this configuration, an amount of steam extracted from a low-pressure steam turbine (2) is reduced.