Abstract: A control device for a CO2 recovery device disposed on a downstream side of a combustion furnace that combusts a combustible material in which a biomass-derived combustible material and a non-biomass-derived combustible material are mixed and recovering CO2 in exhaust gas generated includes: a first acquisition unit that acquires a ratio of weights of the biomass-derived combustible material and the non-biomass-derived combustible material to a weight of the combustible material introduced into the combustion furnace; a first calculation unit that calculates a ratio of CO2 generated from the biomass-derived combustible material and the non-biomass-derived combustible material to CO2 generated from the combustible material in accordance with the acquired ratio; and a second calculation unit that calculates an intake amount of the exhaust gas to the CO2 recovery device based on the calculated ratio of the CO2 generated from the non-biomass-derived combustible material and a flow rate of the exhaust gas.

Abstract: A CO2 recovery system includes: a combustion facility; a CO2 absorption tower that brings an exhaust gas containing CO2, which is discharged from the combustion facility and introduced into the CO2 absorption tower, into contact with a CO2 absorption liquid to remove the CO2 from the exhaust gas; and a decarbonated gas introduction line that is connected to the CO2 absorption tower and the combustion facility and allows at least a portion of a decarbonated gas, which is the exhaust gas from which the CO2 has been removed in the CO2 absorption tower, to be introduced into the combustion facility.

Abstract: A CO2 recovery system includes: a combustion facility; a dust collector into which exhaust gas containing CO2, discharged from the combustion facility, is introduced, and which removes solid components from the exhaust gas; an exhaust gas cooling device into which the exhaust gas is introduced, and which cools the exhaust gas through contact with cooling water; a CO2 absorption tower into which the exhaust gas cooled by the exhaust gas cooling device is introduced, and which removes the CO2 from the exhaust gas in contact with a CO2 absorbent; and a cooling water introduction line which is-connected to the exhaust gas cooling device and to a supply site on an upstream side, in the flow of exhaust gas, of the dust collector, and which guides at least a portion of the cooling water inside the exhaust gas cooling device to the supply site.

Abstract: A composite amine absorbent to absorb at least one of CO2 and H2S in a gas includes: a chain monoamine; a diamine; a cyclic compound represented by the following chemical formula: where R1: any one of hydrogen, a hydrocarbon group having a carbon number of 1 to 4, and a hydroxyalkyl group, R2: oxygen or N—R3, and R3: any one of hydrogen, a hydrocarbon group having a carbon number of 1 to 4, and a hydroxyalkyl group; and water.

Abstract: An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.

Abstract: A composite amine absorbent that absorbs at least one of CO2 and H2S in a gas includes: (a) a chain monoamine; (b) a diamine containing amino groups having the same number of substituents; (c) a chain diamine containing amino groups having different numbers of substituents; and (d) water.

Abstract: An air pollution control unit is configured to bring particle-containing gas and washing liquid into contact with each other to collect particles in the particle-containing gas. The air pollution control unit includes a gas washing column having a gas cleaning section in which the particle-containing gas and the washing liquid are brought into co-current contact with each other, a gas cooling column disposed downstream of the gas washing column along the gas flow and having a gas cooling section in which the particle-containing gas that has been cleaned (cleaned gas) and cooling liquid are brought into countercurrent contact with each other, and a gas communication path.

Abstract: A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe2+ in the acid solution to Fe3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe2+ in the acid solution to Fe3+ to any of the at least one pickling tank or to t

Abstract: Provided is a mist discharge device configured to discharge a mist trapped by a demister, in which the demister is disposed in a gas flow path allowing gas to flow from the lower side to the upper side in the vertical direction, has a lower side serving as an inlet side of the gas and an upper side serving as an outlet side of the gas, and is configured to trap the mist contained in the gas, and the mist discharge device includes a protrusion protruding downward from the inlet side of the demister. The protrusion is a plate-like member extending downward, and a plurality of the plate-like members are disposed to be horizontally spaced at predetermined intervals.

Abstract: A composite amine absorbent to absorb at least one of CO2 and H2S in a gas includes: a chain monoamine; a diamine; a cyclic compound represented by the following chemical formula: where R1: any one of hydrogen, a hydrocarbon group having a carbon number of 1 to 4, and a hydroxyalkyl group, R2: oxygen or N—R3, and R3: any one of hydrogen, a hydrocarbon group having a carbon number of 1 to 4, and a hydroxyalkyl group; and water.

Abstract: An analysis system includes: a collection unit configured to collect soluble iron contained in a sample; a reaction unit configured to produce a reaction solution; a detection unit configured to detect an absorbance of the reaction solution; and a supply control unit configured to supply the soluble iron collected in the collection unit and a reagent to the reaction unit.

Abstract: A composite amine absorbent according to the present invention is an absorbent for absorbing CO2 or H2S, or both of CO2 and H2S in a gas. The absorbent is obtained by dissolving (1) a linear monoamine, (2) a diamine, and (3) propylene glycol alkyl ether, for example, represented by the following chemical formula (I) in water. In the composite amine absorbent, the components complexly interact, and the synergistic effect thereof provides good absorbability of CO2 or H2S, or both of CO2 and H2S and good releasability of CO2 or H2S absorbed during regeneration of the absorbent. Furthermore, the amount of water vapor in a reboiler 26 used during regeneration of the absorbent in a CO2 recovery unit 12 can be reduced.

Abstract: A CO2 recovery unit includes a CO2 absorber that brings a gas having a low CO2 concentration into countercurrent contact with a CO2 absorbent to remove CO2 from the gas. The CO2 recovery unit further includes a first absorbent circulation line that supplies a CO2 absorbent from a first CO2 absorption section as a first circulation solution to an upper side of a first CO2 absorption section; a second absorbent circulation line that supplies a CO2 absorbent from a second CO2 absorption section as a second circulation solution to an upper side of a second CO2 absorption section; and an absorbent discharge line that discharges a part of the first circulation solution from the first absorbent circulation line and supply the part of the first circulation solution as a discharged solution to the second absorbent circulation section.

Abstract: Provided is a solid carbon production facility including: a separation facility configured to separate a carbon dioxide gas contained in a produced gas produced by a blast furnace; a reaction facility configured to heat a fuel gas whose main component is a methane gas by using a heating facility and decompose the methane gas into solid carbon and a hydrogen gas; and a production facility configured to cause the carbon dioxide gas separated by the separation facility and the hydrogen gas decomposed by the reaction facility to react with each other to produce solid carbon and water.

Abstract: An absorbent liquid which absorbs at least one of CO2 and H2S from a gas, including a secondary linear monoamine; a tertiary linear monoamine or a sterically hindered primary monoamine; and a secondary cyclic diamine, wherein a concentration of each of the secondary linear monoamine, the tertiary linear monoamine or the sterically hindered primary monoamine; and the secondary cyclic diamine is less than 30% by weight.

Abstract: An ammonia derivative production plant includes: an electrolyzer for electrolyzing water; an ammonia synthesis system for synthesizing ammonia from hydrogen produced by the electrolyzer and nitrogen; a carbon dioxide generation system for producing carbon dioxide; and an ammonia derivative synthesis system for synthesizing an ammonia derivative from ammonia synthesized by the ammonia synthesis system and carbon dioxide produced by the carbon dioxide generation system. Oxygen produced by the electrolyzer is consumed to produce carbon dioxide by the carbon dioxide generation system.

Abstract: A carbon dioxide recovery system for collecting carbon dioxide from an exhaust gas generated in a facility including a combustion device includes: a first exhaust gas passage through which the exhaust gas containing carbon dioxide flows; a fuel cell including an anode, a cathode disposed on the first exhaust gas passage so that the exhaust gas from the first exhaust gas passage is supplied to the cathode, and an electrolyte transferring, from the cathode to the anode, a carbonate ion derived from carbon dioxide contained in the exhaust gas from the first exhaust gas passage; and a second exhaust gas passage diverging from the first exhaust gas passage upstream of the cathode so as to bypass the cathode. A part of the exhaust gas is introduced to the second exhaust gas passage.

Abstract: A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe2+ in the acid solution to Fe3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe2+ in the acid solution to Fe3+ to any of the at least one pickling tank or to t

Abstract: A workpiece support system includes: a plurality of rods that are extendable and retractable in an axial direction; a holder rotatably placed in an upper end portion of each of the rods, to hold a workpiece; a first lock part that keeps an extended/retracted position of the rod in the axial direction; and a position adjustment device including a hand portion configured to hold the rod or the holder, to perform position control of the hand portion. The position adjustment device moves the hand portion, to extend and retract the rod, based on shape data of the workpiece that is recorded in advance, in a state where the rod or the holder is held by the hand portion, and the first lock part keeps the extended/retracted position of the rod extended and retracted by the position adjustment device.

Abstract: An absorbent for absorbing CO2 or H2S, or both of CO2 and H2S in a gas contains, as components, (a) a secondary linear monoamine, (b) a tertiary linear monoamine, and (c) a secondary cyclic diamine. When the concentration of the secondary linear monoamine (a) is more than 30% by weight and less than 45% by weight and the concentration of the tertiary linear monoamine (b) is more than 15% by weight and less than 30% by weight, absorbability of CO2 or H2S, or both of CO2 and H2S is good, and releasability of CO2 or H2S that have been absorbed during regeneration of the absorbent is good. The amount of steam of a reboiler used during regeneration of the absorbent in a CO2 recovery unit can be thus reduced.