Abstract: Provided is a catalyst structure which prevents an increase in pressure loss by a simple construction while the gas flow is efficiently stirred by a structure making contact between adjacent catalyst elements. The catalyst structure is provided with a first flat-plate part and a second flat-plate part which support, on surfaces thereof, a constituent having catalytic activity to an exhaust gas and face each other, and a stirring part which is provided in such a manner as to come into contact first with the first flat-plate part and the second flat-plate part in an extending manner from the first flat-plate part to the second flat-plate part at a prescribed angle with respect to the direction in which the exhaust gas flows.

Abstract: A carbon dioxide (CO2) chemical absorption system comprising: a CO2 absorption column for separating CO2 from combustion exhaust gas by absorbing the CO2 in the combustion exhaust gas with a CO2 absorbing liquid mainly composed of an aqueous alkanolamine solution; a regeneration column for regenerating the CO2 absorbing liquid by desorbing CO2 gas from the CO2 absorbing liquid that has absorbed CO2; a condenser for condensing water vapor entrained in the desorbed CO2 gas discharged from the top of the regeneration column, thereby obtaining reflux water; a pipe for returning all or part of the reflux water obtained by the condenser to the top of the regeneration column, and dispersing the reflux water in the regeneration column; a collection plate for collecting the reflux water dispersed in an upper portion of a packed bed in the regeneration column; a pipe for sending the regenerated CO2 absorbing liquid from the bottom of the regeneration column to the top of the absorption column; and a pipe for joining th

Abstract: There is provided a denitrification apparatus capable of reducing NOx from a combustion facility and preventing evaporation of a reducing liquid in a lance and an injection nozzle in the combustion facility in operation at a low load by adjusting concentration of a reducing agent, thereby achieving complete evaporation of the reducing liquid in an exhaust gas duct.

Abstract: An exhaust gas treatment system comprising: a CO2 chemical absorption equipment comprising an absorption column which absorbs carbon dioxide (CO2) in a combustion exhaust gas discharged from a combustion device with the use of an absorbing solution comprising an amine compound as a main component and a regeneration column which regenerates the absorbing solution by desorbing CO2 from the absorbing solution which absorbed CO2; a flash tank which depressurizes the absorbing solution withdrawn from a lower part of the regeneration column to flash-evaporate the absorbing solution; a vapor recompression equipment which compresses the vapor generated by the flash tank; a temperature control device which adjusts the vapor compressed by the vapor recompression equipment to be within a predetermined temperature; and a piping for feeding the vapor adjusted to the predetermined temperature by the temperature control device to the regeneration column.

Abstract: [Problem] To provide a drying conveyer apparatus capable of efficiently and uniformly drying coarse particles. [Solution] The present invention is characterized in that a gas get portion (29) is provided on a bottom part of a conveyance member (25), a wind box (35) is provided for supplying drying gas (49) from blow the conveyance member (25), an object to be conveyed (2) is inputted within the conveyance member (25), the drying gas (35) is jetted from the gas jet portion (29) into the conveyance member (25) when the conveyance member (25) passes over the wind box (35), and the object to be conveyed (2) is dried while a fluidized bed thereof is formed.

Abstract: A vertical downflow type flue gas denitrification apparatus which has a plurality of catalyst blocks, each incorporating a catalyst unit provided therein, is provided with a first ash accumulation baffle plate and a second ash accumulation baffle plate which are slidable into a gap between catalyst blocks adjacent to each other, and processes an exhaust gas emitted from a combustor and turned to a vertical downflow. The denitrification apparatus has a simple configuration where the ash accumulation baffle plates prevent ash or the like from being accumulated in the gap between the catalyst blocks. The thermal expansion of the ash accumulation baffle plate can be absorbed even under the operating conditions which produce a change in temperature, and charging and replacing the catalyst in the catalyst blocks are possible without on-site welding of the ash accumulation baffle plates.

Abstract: An object of the present invention is to solve these problems and to provide a exhaust gas treatment system which prevents formation of deposits in a main duct and a flue, on and after the point where the exhaust gases converge, after the removal of CO2 and reduces labor required for maintenance such as cleaning, and thus enabling a long-term operation.

Abstract: A metal substrate for flue gas-denitration catalyst that, like SUS304, can be used without corroding is provided by improving the corrosion resistance of SUS430 substrate that is inexpensive and can easily be supplied stably. A method for producing the metal substrate for flue gas-denitration catalyst, wherein the method comprising the steps of: lath-processing a band-shaped steel plate made of ferrite stainless steel into a band-shaped metal lath; (1) degreasing process oil adhering to the metal lath; (2) passing the metal lath through a solution containing phosphoric acid and surfactant to load the solution; (3) draining off the excess solution; and (4) drying and heating the solution-loaded metal lath to react the phosphoric acid with the substrate, in which respective steps are carried out sequentially to form a film of phosphate compound on a surface of the substrate.

Abstract: An exhaust gas denitrizer removes nitrogen oxides from rejoined exhaust gas using a denitrification reactor after supplying ammonia gas to the rejoined exhaust gas made up of main exhaust gas cooled by a fuel economizer by flowing through a main duct and bypass exhaust gas maintained at high temperature by flowing through a bypass duct adapted to bypass the fuel economizer. At a meeting place between the main exhaust gas and bypass exhaust gas in the main duct, three partition plates are installed with plate surfaces turned to an inflow direction of the bypass exhaust gas, partitioning a main exhaust gas channel into a plurality of sub-channels. Upstream-side ends of the partition plates face the incoming bypass exhaust gas by being shifted from one another toward an upstream side of the main exhaust gas starting from an inflow side of the bypass exhaust gas.

Abstract: In an exhaust gas treatment device provided with: an exhaust gas treatment unit in which an oxygen combustion boiler 1 using coal as fuel, a denitration device 3, an air preheater 4, a dust-collection device 5, a desulfurization device 6, and a carbon dioxide recovery device 8 are sequentially arranged from the upstream side to the downstream side of an exhaust gas duct; and an exhaust gas circulation unit which branches off from the exhaust gas duct at an outlet of the dust-collection device 5 or an outlet of the desulfurization device 6 and through which the exhaust gas is preheated by the air preheater 4 and returned to the oxygen combustion boiler 1, a heat-recovery heat exchanger 13 that adjusts a gas temperature at an inlet of the dust-collection device 5 to be not greater than an acid dew point of SO3 and not lower than a water dew point is provided between the air preheater 4 and the dust-collection device 5, a reheating heat exchanger 13 that adjusts a gas temperature to be not lower than the acid de

Abstract: Provided is a method for cleaning a used denitration catalyst, which prevents release of mercury to the atmosphere by collecting and removing mercury which would have been released to the atmosphere in the process of cleaning the used denitration catalyst. The method comprises immersing the used denitration catalyst mainly composed of titanium oxide and having been used in exhaust gas containing mercury in a cleaning liquid, and stirring the cleaning liquid to dissolve and remove catalyst poisons including the mercury from the used denitration catalyst, wherein a waste gas generated in the step of stirring the cleaning liquid is conducted to a flue having a mercury removal device so as to remove the mercury, and then vented to the atmosphere.

Abstract: An object of the present invention is to provide an exhaust gas treatment system that effectively use heat recovered from an exhaust gas without any limitation in a CO2 chemical absorption equipment that requires enormous heat energy, and thus enabling reduction in running cost of the CO2 chemical absorption equipment.

Abstract: A method of recovering carbon dioxide, includes bringing gas to be processed containing carbon dioxide (CO2) and oxygen into contact with the CO2-absorbing solution in an absorption column to form a CO2-rich solution; circulating the solution in a regeneration column to thermally release and recover CO2 and recirculating the absorbing solution as a CO2-poor solution inside the absorption column; and performing heat exchange between the solution being delivered from the absorption column to the regeneration column and the solution recirculated from the regeneration column to the absorption column, wherein an alkanolamine aqueous solution containing a silicone oil and/or an organosulfur compound is added to the solution inside the absorption column and/or the solution recirculated from the regeneration column to the absorption column to adjust the composition of the absorbing solution inside the absorption column.

Abstract: A solar heat boiler is provided which is capable of avoiding damage to heat transfer tubes without increasing facility cost and construction cost. The solar heat boiler includes: a low-temperature heating device by which water supplied from a water supply pump is heated by heat of sunlight; a steam-water separation device by which two-phase fluid of water and steam generated in the low-temperature heating device is separated into water and steam; a high-temperature heating device by which the steam separated by the steam-water separation device is heated by the heat of sunlight; and a circulation pump by which the water separated by the steam-water separation device is supplied to the low-temperature heating device.

Abstract: [Problem] To provide a rotating classifier which can keep classification performance high and which can prevent blockages caused by biomass and the like. [Means for Resolution] The rotating classifier is characterized in that: comb teeth-like protrusion portions protruding toward a fixed member side are provided on top of rotary classification fins at intervals along the circumferential direction of the rotating classifier fins; a first gap is provided between an upper end portion of each of the comb teeth-like protrusion portions and a lower surface of the fixed member; a second gap formed between a protrusion portion and a protrusion portion adjacent to the protrusion portion is connected to the first gap; and an air stream flowing from the radial outside to the radial inside of the comb teeth-like protrusion portions through the first gap and the second gap is formed due to the rotation of the rotary classification fins.

Abstract: A burner including a fuel-containing fluid supply nozzle which supplies a fuel-containing fluid, from a connecting part in a fluid transfer flow passage for transferring a fuel-containing fluid including a fuel and a medium for transfer of the fuel, toward an outlet part provided on a furnace wall surface. The nozzle in its cross section perpendicular to the direction of flow of the fluid has a rectangular, elliptical, or substantially elliptical form having major and minor axis parts from a connecting part in the fluid transfer flow passage toward the outlet part provided on the furnace wall surface. Further, the area of a cross section perpendicular to the direction of flow of the fluid is gradually increased from the connecting part in the fluid transfer flow passage toward the outlet part. Air supply nozzle(s) for supplying combustion air are provided on the outer peripheral part of the nozzle.

Abstract: An exhaust gas purification catalyst is made as a composition comprising titanium oxide (TiO2), aluminum sulfate (Al2(SO4)3), an oxide of vanadium (V), and an oxide of molybdenum (Mo) and/or tungsten (W), wherein on titanium oxide having sulfate ions and aluminum ions adsorbed thereon obtained by making contact with aluminum sulfate at more than 1 wt % and not more than 6 wt % relative to titanium oxide in the presence of water, an oxo acid salt of vanadium or a vanadyl salt and an oxo acid or an oxo acid salt of molybdenum and/or tungsten are supported in a proportion of more than 0 atom % and not more than 3 atom %, respectively. By this, the degradation of catalyst performance can be suppressed even with exhaust gas containing potassium compounds at a high concentration in combustion ash.

Abstract: Provided is a silver-supported alumina catalyst for reducing nitrogen oxides using ethanol, which has the drawbacks of the conventional silver-supported alumina catalysts improved, has high performance, is not likely to deteriorate over time, and has excellent initial performance and durability. A catalyst for purifying nitrogen oxides, which purifies nitrogen oxides in exhaust gas using an alcohol as a reducing agent, and contains alumina, aluminum sulfate and silver as main components.

Abstract: To provide a classification device in which product fine powder little in mixture ratio of coarse particles can be obtained. A classification device characterized in that a setting pitch P between stationary fins 13 and a width L of each stationary fin 13 are combined so that a value of P/L is in a range between 0.042×(??50)+0.64 and 0.019×(??50)+0.22 in 50°???70° when ? is an inclination angle of each stationary fin 13, P is the setting pitch, and L is the width in a direction of circulation of particles.

Abstract: In a boiler having plurality of burners arranged on a furnace wall of a furnace, each burner includes a cylindrical fuel nozzle for injecting a mixture of fuel and carrier gas therefor into the furnace; one or more cylindrical air nozzles provided on the outer circumference of the nozzle for injecting combustion air into the furnace, and a wind box for supplying combustion air to the nozzles in common. The wind box is provided with openings through which combustion air flows in from one direction perpendicular to the axial direction of the burner, and is partitioned by a partition wall to form plurality of parallel flow paths for the air flowing in through the openings. Some of the plurality of flow paths are connected to an upper part of the combustion air nozzle, and the other flow paths are connected to a lower part of the nozzle.