Abstract: A carbon dioxide reduction system includes: an absorption tower configured to bring a source gas containing carbon dioxide into contact with an absorption liquid composed of an aqueous solution containing at least one amine compound so that the carbon dioxide is absorbed in the absorption liquid; an electrolysis apparatus for electrolyzing the carbon dioxide absorbed in the absorption liquid in the absorption tower; and a circulation line for circulating the absorption liquid between the absorption tower and the electrolysis apparatus.

Abstract: The composite amine absorbing solution according to the present invention absorbs CO2 or H2S or both in a gas, and is obtained by dissolving a linear monoamine, a diamine, and an amide group-containing compound in water. By adopting this composite amine absorbing solution, the composites are interacting in a composite manner, due to an integrated effect of the components, the absorption property of CO2 or H2S or both is favorable, the desorption properties of the CO2 or H2S absorbed when regenerating the absorbing solution become favorable, and the amount of steam from a reboiler used when regenerating the absorbing solution in a CO2 recovery device can be reduced.

Abstract: A CO2 recovery device includes an advanced desulfurization-cooling column that removes sulfur oxides in an exhaust gas and reduces a temperature of the exhaust gas; a CO2 absorption column that removes CO2 in the exhaust gas by bringing the CO2 into contact with a CO2 absorption liquid; and a regeneration column that recovers the CO2 by causing the CO2 absorption liquid to release the CO2 while regenerating the CO2 absorption liquid, and feeds the regenerated CO2 absorption liquid to the CO2 absorption column, where the advanced desulfurization-cooling column includes a circulating line that supplies and circulates a desulfurization-cooling circulation liquid used in order to conduct desulfurization and cooling from a lower part to an upper part of the advanced desulfurization-cooling column, a deep SOx recovery packed bed, and a first cooler that cools the circulation liquid.

Abstract: A plant according to an embodiment includes a gas turbine; a heat recovery unit that includes a primary heat recovery steam generator in which a primary heat exchanging unit generates primary steam by exchanging heat that is the thermal energy of the flue gas from the gas turbine, and a secondary heat recovery steam generator that is installed independently from the primary heat exchanging unit, and in which a secondary heat exchanging unit generates secondary steam by exchanging heat that is the thermal energy of the flue gas partly having exchanged heat in the primary heat exchanging unit included in the primary heat recovery steam generator; a primary steam turbine; a CO2 recovery unit; and a first reboiler heat supply line.

Abstract: A reclaiming device that separates an absorption liquid from a coexisting material other than an absorbent includes: a gas-liquid separator that accepts the absorption liquid to be reclaimed together with water and separates the absorption liquid into a non-volatile material and a vaporized material; a first discharged liquid line that introduces a first discharged liquid discharged from the gas-liquid separator into the gas-liquid separator at a position below an absorption liquid introduction port; a first heater, disposed on the first discharged liquid line, that heats the first discharged liquid; a second discharged liquid line that introduces a second discharged liquid discharged from the gas-liquid separator into the gas-liquid separator at a position below a first discharged liquid introduction port; and a mixing tank, disposed on the second discharged liquid line, that mixes the second discharged liquid with an alkaline agent.

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 acid gas removal apparatus includes a reclaimer control device that performs: first supply water control in which at least one of reflux water, steam condensate, and desalinated water is supplied to a reclaimer as first supply water, at non-volatile component removal reclaiming; second supply water control in which at least one of the reflux water, the steam condensate, and the desalinated water is supplied to the reclaimer, and a washing liquid including an acid gas absorbing liquid is supplied to the reclaimer as second supply water, at an initial stage of finish reclaiming; and third supply water control in which supply of the second supply water is stopped and at least one of the reflux water, the steam condensate, and the desalinated water is supplied as the first supply water, at a later stage of the finish reclaiming.

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: A CO2 recovery device includes: an absorption tower configured to bring an emission gas including CO2 in contact with an absorbent solution, to remove the CO2 from the emission gas, and to thereby generate a rich solution corresponding to the absorbent solution having absorbed the CO2; a regeneration tower configured to regenerate the absorbent solution by removing the CO2 from the rich solution; a heat exchanger configured to carry out heat exchange between the rich solution and the absorbent solution which is higher in temperature than the rich solution and from which the CO2 is removed; an absorbent-solution delivery pipe configured to deliver the absorbent solution subjected to the heat exchange in the heat exchanger to the absorption tower; and a bypass pipe configured to deliver the rich solution before the heat exchange to the absorbent-solution delivery pipe.

Abstract: An acid gas removal apparatus includes a reclaimer control device that performs: first supply water control in which at least one of reflux water, steam condensate, and desalinated water is supplied to a reclaimer as first supply water, at non-volatile component removal reclaiming; second supply water control in which at least one of the reflux water, the steam condensate, and the desalinated water is supplied to the reclaimer, and a washing liquid including an acid gas absorbing liquid is supplied to the reclaimer as second supply water, at an initial stage of finish reclaiming; and third supply water control in which supply of the second supply water is stopped and at least one of the reflux water, the steam condensate, and the desalinated water is supplied as the first supply water, at a later stage of the finish reclaiming

Abstract: A reclaiming apparatus includes: a reclaimer configured to extract a lean solution that is a part of an acid gas absorbing liquid regenerated in a regenerator in a recovery unit that recovers acid gas components in gas with the acid gas absorbing liquid, and introduce and receive an extracted lean liquid; an alkaline agent supply pipe configured to supply an alkaline agent to an inside of the reclaimer; a water supply pipe configured to supply supply water to the inside of the reclaimer; a recovered steam discharge pipe configured to introduce recovered steam discharged from the reclaimer into the regenerator; a thermometer that measures temperature in the reclaimer; a pressure guage configured to measure pressure in the reclaimer; and a reclaimer controller.

Abstract: An absorption column is equipped with: a CO2 absorption section absorbing CO2 from CO2-containing exhaust gas using a lean solution; a main rinse section recovering an entrained CO2 absorbent using rinse water; a rinse water circulation line circulating a rinse water containing the CO2 absorbent recovered in a liquid storage section of the main rinse section; a pre-rinse section provided between the CO2 absorption section and the main rinse section; a rinse section extraction liquid supply line extracting a portion of the rinse water containing the CO2 absorbent from the rinse water circulation line, and introducing the same into a reflux section of an absorption liquid regeneration tower; and a refluxed water supply line extracting a portion of refluxed water, introducing the same as pre-rinse water for the pre-rinse section, and connected on the pre-rinse section side.

Abstract: SOx removal equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on a downstream side of the SOx removal equipment for reducing the sulfur oxides that remain in the flue gas and for decreasing a gas temperature, CO2 recovery equipment which includes a CO2 absorber, and an absorption liquid regenerator, and mist generation material reduction equipment for reducing a mist generation material which is a generation source of mist that is generated in the CO2 absorber of the CO2 recovery equipment before introducing the flue gas to the CO2 recovery equipment are included.

Abstract: A CO2 recovery apparatus includes: an absorption tower configured to remove CO2 in an exhaust gas by contacting with a CO2 absorption liquid containing an absorption agent; a regeneration tower for regenerating the CO2 absorption liquid from the absorption tower; a reflux water drum for separating CO2 gas released from the regeneration tower into CO2 gas and condensed water; a first cleaning device installed in a gas-phase part of the regeneration tower and configured to remove the absorption agent contained in the CO2 gas flowing through the gas-phase part, by using a first cleaning liquid containing at least the condensed water from the reflux water drum or a water obtained from the condensed water; and a control device configured to adjust a supply amount of the first cleaning liquid to the first cleaning device so that a concentration of the absorption agent in the condensed water is maintained to be not greater than a predetermined value.

Abstract: A system for analyzing a CO2 concentration of an amine-based absorbing solution includes a measurement apparatus that measures a viscosity of the amine-based absorbing solution and at least one selected from conductivity and ultrasonic propagation velocity of the amine-based absorbing solution, wherein the amine-based absorbing solution absorbs and removes CO2 from a target gas by gas-liquid contact with the target gas; and a controller that determines the CO2 concentration of the amine-based absorbing solution from results measured by the measurement apparatus.

Abstract: An acid gas recovery method includes removing acid gas from a target gas by bringing the target gas containing the acid gas into gas-liquid contact with an absorbent amine solution and causing the absorbent amine solution to absorb the acid gas; regenerating the absorbent amine solution by releasing the acid gas from the absorbent amine solution that has absorbed the acid gas; causing a chelate resin to adsorb iron ions from the absorbent amine solution by causing the absorbent amine solution to pass through the chelate resin; causing a regenerant solution to pass through a chelate resin having iron ions adsorbed thereon; regenerating the chelate resin and obtaining a regenerant solution containing the iron ions and quantitatively measuring the iron ions in the regenerant solution containing the iron ions and calculating a concentration of iron ions in the absorbent amine solution.

Abstract: A CO2 recovery system includes: a CO2 absorber that transports flue gas with CO2 into contact with a CO2 absorbent to remove the CO2 and discharges a rich solution that has absorbed the CO2; an absorbent regenerator that separates the CO2 from the rich solution to regenerate the CO2 absorbent as a lean solution; a gas discharge line where a CO2 entrained gas from the absorbent regenerator is discharged; a reflux water drum that produces reflux water by separating CO2 and water from the CO2 entrained gas; a separation-gas discharge line where the separated CO2 is discharged; a compressor that compresses the separated CO2 gas; a condensate water drum that forms compressor condensate water by separating water from the compressed CO2 gas to form compressor condensate water; and a compressor-condensate water line that supplies the compressor condensate water as in-system or out-of-system supply water.

Abstract: A reclaiming apparatus includes: a container; an absorption-liquid supply line for supplying the container with an absorption liquid containing an absorption agent; a water supply line for supplying the container with a water; a steam discharge line for discharging steam from the container; a heating device for heating a liquid containing at least one of the water or the absorption liquid; and a control device configured to determine, on the basis of a temperature of the liquid stored in the container, an ending timing of an absorption-agent recovery process of recovering steam containing the absorption agent via the steam discharge line by heating of the liquid with the heating device.

Abstract: A reclaiming apparatus includes: a container in which a reclaiming process of an absorption liquid is performed; an absorption liquid supply line for supplying the container with the absorption liquid; a heat exchange device, installed inside the container, for heating a liquid inside the container; a circulation line for extracting the liquid inside the container, circulating the liquid and returning the liquid to the container; and a circulation pump installed in the circulation line.

Abstract: A CO2 recovery apparatus includes: an absorption tower configured to remove CO2 in an exhaust gas by contacting with a CO2 absorption liquid containing an absorption agent; a regeneration tower for regenerating the CO2 absorption liquid from the absorption tower; a reflux water drum for separating CO2 gas released from the regeneration tower into CO2 gas and condensed water; a first cleaning device installed in a gas-phase part of the regeneration tower and configured to remove the absorption agent contained in the CO2 gas flowing through the gas-phase part, by using a first cleaning liquid containing at least the condensed water from the reflux water drum or a water obtained from the condensed water; and a control device configured to adjust a supply amount of the first cleaning liquid to the first cleaning device so that a concentration of the absorption agent in the condensed water is maintained to be not greater than a predetermined value.