Abstract: Flue gas generated when fuel is subjected to combustion by a combustor such as a boiler is supplied, and a sulfur oxide is reduced or removed from the supplied flue gas. A desulfurization apparatus 10A includes an absorber 11, a gas introduction unit 13a, an absorbent jetting unit 15, a plurality of water flow oxidation devices 20, an absorbent supplying unit 25, a demister 30, a gas discharging unit 13b, and a control device 40 that varies the number of water flow oxidation devices 20 that jet absorbent 14 and air 21 based on a rate of the sulfur compound in the absorbent 14 within an absorbent storage tank 11A.

Abstract: A limestone supply device is provided for supplying calcium carbonate to an upstream of a desulfurization device and a heat exchanger disposed on an upstream of the desulfurization device on a flue gas duct through which flue gas discharged from a combustion engine in which a fuel burns flows. An air pollution control system having the limestone supply device is provided, including a calcium carbonate accumulate unit configured to accumulate calcium carbonate, a calcium carbonate transport unit configured to transport the calcium carbonate accumulated in the calcium carbonate accumulate unit, a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit to the flue gas duct, and a moisture supply unit configured to supply moisture to a region to which the calcium carbonate is supplied by the calcium carbonate supply unit.

Abstract: Provided is an absorber that removes sulfur oxide in a flue gas with an absorbent, an absorbent storing unit that stores the absorbent that has absorbed the sulfur oxide, an oxidation-reduction potential meter that measures an oxidation-reduction potential of the absorbent in the absorbent storing unit, a reducing additive supplying unit that supplies a sulfur oxoacid reducing additive into the absorbent storing unit, and a control device that controls the reducing additive supplying unit based on a measured value of the oxidation-reduction potential of the absorbent measured with the oxidation-reduction potential meter, wherein the reducing additive supplying unit supplies the sulfur oxoacid reducing additive when the measured value of the oxidation-reduction potential has exceeded an upper limit of an appropriate range of the oxidation-reduction potential.

Abstract: A non-transitory computer readable recording medium stores therein a risk evaluation program that causes a computer to execute a process including: calculating a recognized risk for each of a plurality of areas based on a security plan for the plurality of areas, the recognized risk being that an intruder is recognized by security resources at each of a plurality of calculation timings; and outputting the recognized risk with respect to each of the plurality of areas at each of the plurality of calculation timings, wherein the calculating for each of the plurality of calculation timings includes calculating the recognized risk with respect to each of the plurality of areas based on the recognized risk with respect to each of the plurality of areas at a previous timing, moving ability of the intruder, and the security plan.

Abstract: Provided are: an NOx removal unit to remove nitrogen oxide; an air preheater on a downstream side of the NOx removal unit to recover heat; a precipitator on a downstream side of the air preheater to remove ash dust; a gas-liquid contact type desulfurization unit on a downstream side of the precipitator to remove sulfur oxide; an SO3 removing agent supply unit to supply an SO3 removing agent at a supply unit on an upstream side of the precipitator; and a wet state processing unit between the air preheater and the supply unit to supply water to a flue gas to be made into a wet state; the wet state processing unit having a stand-up portion, a partition unit and a droplet supply unit.

Abstract: A search apparatus specifies a first respondent group based on a respondent attribute of a respondent. The search apparatus searches for a respondent preference of the respondent utilizing a plurality of inquiries for the respondent, the plurality of inquiries being made with a first preference of the first respondent group as an initial value and corresponding to a first segment that the first respondent group belongs to. The search apparatus, when a specific condition is not satisfied after search from the initial value with a specific number of inquiries, generates or selects a second respondents group based on the respondent attribute, answers to the plurality of inquiries, and on preferences of a second respondent group, the second respondent group satisfying the specific condition. The search apparatus searches for the respondent preference with a preference of the second respondent group being an initial value.

Abstract: A cement solidification device for waste includes a slurrying vessel 14 that dissolves and slurries waste 11 containing harmful substances and deliquescent compounds in solvent water 12 to obtain slurried material 13; an iron-based additive supply unit 16 that adds an iron-based additive 15 to the slurrying vessel 14; a cement kneading vessel 20 that adds a cement solidifying agent 17 from a cement-solidifying agent supply unit 18 to the slurried material 13 in which the iron-based additive 15 is mixed to obtain a cement kneaded product 19; and a cement solidification unit 22 that cures the cement kneaded product 19 to form a cement solidified product 21.

Abstract: Provided is an air pollution control system including: a denitration apparatus; an air heater; a precipitator; a desulfurization apparatus; a dehydrator; a spray drying apparatus provided with a spray unit that is configured to spray dehydrated filtrate supplied from the dehydrator; a flue gas introduction line through which a branch gas branched from the flue gas is introduced to the spray drying apparatus; a flue gas supply line through which a flue gas from the spray drying apparatus returns to a main flue gas duct; a solid content separator that performs a solid-gas separation on solid contents contained in the flue gas; and a kneader that performs kneading and immobilizing treatment on the separated solid contents together with an immobilization aid.

Abstract: Provided is an absorber that removes sulfur oxide in a flue gas with an absorbent, an absorbent storing unit that stores the absorbent that has absorbed the sulfur oxide, an oxidation-reduction potential meter that measures an oxidation-reduction potential of the absorbent in the absorbent storing unit, a reducing additive supplying unit that supplies a sulfur oxoacid reducing additive into the absorbent storing unit, and a control device that controls the reducing additive supplying unit based on a measured value of the oxidation-reduction potential of the absorbent measured with the oxidation-reduction potential meter, wherein the reducing additive supplying unit supplies the sulfur oxoacid reducing additive when the measured value of the oxidation-reduction potential has exceeded an upper limit of an appropriate range of the oxidation-reduction potential.

Abstract: A heat exchanger includes a heat recovery unit that causes a heat medium to recover heat from flue gas through first heat exchange by bringing the flue gas into contact with a fin tube; a reheater including a preheating unit configured to preheat flue gas through second heat exchange by bringing the flue gas into contact with a tube, and heating units that heat the flue gas through third heat exchange by bringing the flue gas into contact with the heat medium; and a control unit that calculates a recovered heat quantity to be recovered by the heat recovery unit from the flue gas through the first heat exchange, and that controls temperature of the heat medium after the first heat exchange within a predetermined range.

Abstract: The air pollution control system including: a flue gas duct through which flue gas flows; a heat exchanger provided to the flue gas duct; a limestone supply device for reducing SO3 in the flue gas supplies CaCO3 to the flue gas flowing in an upstream of the heat exchanger; an upstream SO3 measurement device measures the SO3 in the flue gas flowing in a stream upper than a position where the limestone supply device supplies the CaCO3; and a control device determines a quantity supplied of the CaCO3 based on a relationship between a quantity of the SO3 measured by the upstream SO3 measurement device and a molar ratio of SO3 to CaCO3 and which supplies the determined quantity supplied of the CaCO3 from the limestone supply device to the flue gas duct.

Abstract: A non-transitory computer-readable recording medium stores an operation planning program that causes a computer to execute a process including: for a set including elements that are users, for which a plan of operation including ride sharing is to be generated, performing ordering of the elements of the set by using indices indicating highness of possibilities that subadditivity is fulfilled, determining whether a combination of the elements in descending order of the ordering fulfills the subadditivity, the number of the elements in the combination being equal to or less than a predetermined number, and partitioning the set into subsets, for which the ride sharing is to be operated, by adding the combination of elements fulfilling the subadditivity to the subsets; and generating the plan of operation by using the partitioned subsets.

Abstract: When a liquid level is changed even though an inflow of a heat medium into a specific heat transfer tube bundle is stopped, it is determined that there is no abnormality in the heat transfer tube bundle in which the inflow of the heat medium is stopped and then another heat transfer tube bundle is inspected. Next, when the inflow of the heat medium into the specific heat transfer tube bundle is stopped not to cause the change in the liquid level, it is determined that there is an abnormality in the heat transfer tube bundle to which the inflow of the heat medium is stopped. Thus, it is possible to determine that there is an abnormality in the heat transfer tube bundle in which the inflow of the heat medium is stopped.

Abstract: The air pollution control system including: a flue gas duct through which flue gas flows; a heat exchanger provided to the flue gas duct; a limestone supply device for reducing SO3 in the flue gas supplies CaCO3 to the flue gas flowing in an upstream of the heat exchanger; an upstream SO3 measurement device measures the SO3 in the flue gas flowing in a stream upper than a position where the limestone supply device supplies the CaCO3; and a control device determines a quantity supplied of the CaCO3 based on a relationship between a quantity of the SO3 measured by the upstream SO3 measurement device and a molar ratio of SO3 to CaCO3 and which supplies the determined quantity supplied of the CaCO3 from the limestone supply device to the flue gas duct.

Abstract: A spray-drying device includes a spray nozzle that sprays the dehydrated filtrate from the desulfurization wastewater, in a spray-drying device body, an inlet that is provided in the spray-drying device body and introduces flue gas for drying spray liquid, a dry area that is provided in the spray-drying device body and dries the dehydrated filtrate by the flue gas, an outlet that discharged the flue gas contributing to the drying, a plurality of thermometers that are provided in the dry area and measure temperatures of the inside, a determination unit that determines whether or not a spray-drying state of the dehydrated filtrate is satisfactory on the basis of the measurement results of the thermometers, and a control unit that adjusts the flue gas or the dehydrated filtrate when it is determined that the spray-drying is not satisfactory as a result of the determination of the determination unit.

Abstract: A limestone supply device is provided for supplying calcium carbonate to an upstream of a desulfurization device and a heat exchanger disposed on an upstream of the desulfurization device on a flue gas duct through which flue gas discharged from a combustion engine in which a fuel burns flows. An air pollution control system having the limestone supply device is provided, including a calcium carbonate accumulate unit configured to accumulate calcium carbonate, a calcium carbonate transport unit configured to transport the calcium carbonate accumulated in the calcium carbonate accumulate unit, a calcium carbonate supply unit configured to supply the calcium carbonate transported by the calcium carbonate transport unit to the flue gas duct, and a moisture supply unit configured to supply moisture to a region to which the calcium carbonate is supplied by the calcium carbonate supply unit.

Abstract: A spray drying apparatus includes a gas inlet provided on a side wall in the vicinity of a top portion of the spray drying apparatus, for introducing a flue gas for drying a spray liquid of a dehydration filtrate; a rectifying plate provided in a spray drying apparatus main body, for decelerating the introduced flue gas so as to alter the flue gas flow to a laminar flow; a spray nozzle for spraying the dehydration filtrate emitted from the desulfurization waste water into the flue gas altered to the laminar flow; a gas outlet provided in the vicinity of a bottom portion of the spray drying apparatus main body, for discharging the flue gas contributed to drying of the dehydration filtrate; and a discharge hopper provided on the bottom portion side of the spray drying apparatus main body, for discharging an ash as a spray-dried solid.

Abstract: A spray drying apparatus includes: a gas inlet provided in a side wall in the vicinity of a top (lid) portion of the spray drying apparatus, for introducing a flue gas for drying a spray of dehydrated filtrate; flow-adjusting plates provided in a body of the spray drying apparatus, for decelerating the introduced flue gas so as to change the flow of the flue gas to a laminar flow; a spray nozzle for spraying the dehydrated filtrate from the desulfurization waste water into the flue gas having been changed to the laminar flow; and a joining unit for joining a bottom portion of the body of the spray drying apparatus to a gas supply line that is a main flue gas duct for the flue gas so as to discharge spray-dried solids to the main flue gas duct.

Abstract: A spray drying apparatus includes: a gas inlet provided in a side wall in the vicinity of a top (lid) portion of the spray drying apparatus, for introducing a flue gas for drying a spray of dehydrated filtrate; flow-adjusting plates provided in a body of the spray drying apparatus, for decelerating the introduced flue gas so as to change the flow of the flue gas to a laminar flow; a spray nozzle for spraying the dehydrated filtrate from the desulfurization waste water into the flue gas having been changed to the laminar flow; and a joining unit for joining a bottom portion of the body of the spray drying apparatus to a gas supply line that is a main flue gas duct for the flue gas so as to discharge spray-dried solids to the main flue gas duct.

Abstract: A spray drying apparatus includes: a gas inlet provided in a side wall in the vicinity of a top (lid) portion of the spray drying apparatus, for introducing a flue gas for drying a spray of dehydrated filtrate; flow-adjusting plates provided in a body of the spray drying apparatus, for decelerating the introduced flue gas so as to change the flow of the flue gas to a laminar flow; a spray nozzle for spraying the dehydrated filtrate from the desulfurization waste water into the flue gas having been changed to the laminar flow; and a joining unit for joining a bottom portion of the body of the spray drying apparatus to a gas supply line that is a main flue gas duct for the flue gas so as to discharge spray-dried solids to the main flue gas duct.