Abstract: A vertical roller mill provided with a cyclone-type fixed separator that separates fine powder and allows the separated powder to flow out to the outside, the cyclone-type fixed separator being provided inside a housing, wherein the fixed separator is configured so that a solid-gas two-phase flow is introduced from a fixed blade inlet window opening on a cone into the inside and the solid-gas two-phase flow is swirled using a fixed blade attached in the inside vicinity of the fixed blade inlet window, whereby the fine powder flows out to the outside from a pulverized coal outlet in an upper portion of the vertical roller mill through the lower end side of an inner cylinder provided inside the cone, a surface layer in which the rebound coefficient of collided particles is higher than in an iron plate surface being formed in the outer surface of the inner cylinder.

Abstract: Provided is a duct wall surface structure which, in a flue of an iron-sheet duct with a hopper through which a solid-gas two-phase stream flows, can enhance the solid particle trapping efficiency of the hopper and reduce the outflow of the solid particles to the duct downstream side. The duct wall surface structure of a flue (10) through which a solid-gas two-phase stream containing large-diameter ash (50) flows includes a first hopper (20A) installed at the lower end of a first vertical flue section (12), installed in such a direction that the stream has a vertical component of velocity, to collect the large-diameter ash (50) from the stream, wherein a low-rebound part (60) having a lower coefficient of restitution than an iron sheet is provided on an inclined surface (21), with which the large-diameter ash (50) collides, on the upstream side in the flow direction from the first hopper (20A).

Abstract: In an exhaust duct and a boiler, there are provided: a flue gas duct through which flue gases pass; a first hopper provided to the flue gas duct, the first hopper collecting PA in the flue gases; a low-repulsion section provided to the upstream side or the downstream side of the first hopper in the direction of flow of the flue gases, the low-repulsion section having a lower coefficient of repulsion than the inner wall surface of the flue gas duct; and a popcorn-ash-trapping section for trapping PA in the flue gases, the popcorn-ash-trapping section provided to the downstream side of the first hopper and the low-repulsion section in the direction of flow of the flue gases, whereby it is possible for solid particles in the flue gases to be properly trapped.

Abstract: An exhaust duct and boiler can appropriately collect solid particles in flue gas by way of being provided with: a flue (40) in which flue gas can flow; a first hopper (61) that is provided in the flue (40) and that can collect solid particles (PA) in the flue gas; and a first baffle plate (71) and a second baffle plate (72) that are resisting members capable of blocking the flow of solid particles (PA) from the first hopper (61).

Abstract: The present invention provides a water inflow prevention device that prevents an inflow of water into an aircraft when the aircraft lands in water through a communication passage allowing the inside and outside of the aircraft to communicate with each other. The water inflow prevention device includes a mesh part provided in the communication passage, through the mesh part a fluid flowing through the communication passage passes.

Abstract: In an exhaust duct and a boiler, there are provided: a flue gas duct through which flue gases pass; a first hopper provided to the flue gas duct, the first hopper collecting PA in the flue gases; a low-repulsion section provided to the upstream side or the downstream side of the first hopper in the direction of flow of the flue gases, the low-repulsion section having a lower coefficient of repulsion than the inner wall surface of the flue gas duct; and a popcorn-ash-trapping section for trapping PA in the flue gases, the popcorn-ash-trapping section provided to the downstream side of the first hopper and the low-repulsion section in the direction of flow of the flue gases, whereby it is possible for solid particles in the flue gases to be properly trapped.

Abstract: A collector 3 that collects particles P contained in a fluid includes: a bent pipe 31 that guides the fluid flowing from a first direction X in a second direction Z; a branch pipe 32 that causes the fluid guided in the second direction Z to branch into the second direction Z and a third direction Y; a collection pipe 34 in which the particles P in the fluid guided in the second direction Z by the branch pipe 32 are collected; and a reduction-expansion pipe 33 which is arranged between the bent pipe 31 and the branch pipe 32 and of which the flow path is narrowed while being biased to an inlet side of the bent pipe 31.

Abstract: An exhaust duct and boiler can appropriately collect solid particles in flue gas by way of being provided with: a flue (40) in which flue gas can flow; a first hopper (61) that is provided in the flue (40) and that can collect solid particles (PA) in the flue gas; and a first baffle plate (71) and a second baffle plate (72) that are resisting members capable of blocking the flow of solid particles (PA) from the first hopper (61).

Abstract: Provided is a duct wall surface structure which, in a flue of an iron-sheet duct with a hopper through which a solid-gas two-phase stream flows, can enhance the solid particle trapping efficiency of the hopper and reduce the outflow of the solid particles to the duct downstream side. The duct wall surface structure of a flue (10) through which a solid-gas two-phase stream containing large-diameter ash (50) flows includes a first hopper (20A) installed at the lower end of a first vertical flue section (12), installed in such a direction that the stream has a vertical component of velocity, to collect the large-diameter ash (50) from the stream, wherein a low-rebound part (60) having a lower coefficient of restitution than an iron sheet is provided on an inclined surface (21), with which the large-diameter ash (50) collides, on the upstream side in the flow direction from the first hopper (20A).

Abstract: The present invention provides a water inflow prevention device that prevents an inflow of water into an aircraft when the aircraft lands in water through a communication passage allowing the inside and outside of the aircraft to communicate with each other. The water inflow prevention device includes a mesh part provided in the communication passage, through the mesh part a fluid flowing through the communication passage passes.

Abstract: A vertical roller mill provided with a cyclone-type fixed separator that separates fine powder and allows the separated powder to flow out to the outside, the cyclone-type fixed separator being provided inside a housing, wherein the fixed separator is configured so that a solid-gas two-phase flow is introduced from a fixed blade inlet window opening on a cone into the inside and the solid-gas two-phase flow is swirled using a fixed blade attached in the inside vicinity of the fixed blade inlet window, whereby the fine powder flows out to the outside from a pulverized coal outlet in an upper portion of the vertical roller mill through the lower end side of an inner cylinder provided inside the cone, a surface layer in which the rebound coefficient of collided particles is higher than in an iron plate surface being formed in the outer surface of the inner cylinder.

Abstract: An air pollution control device is an air pollution control device for reducing the amounts of NOx and Hg contained in flue gas 12 from a boiler 11. The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a spray nozzle 15 into a flue gas duct 13 at the downstream of the boiler 11; a mixer 17 provided on the downstream side of a region where NH4Cl is gasified, for promoting mixing, with the flue gas 12, HCl and NH3 which are generated when NH4Cl is gasified; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 using a limestone-gypsum slurry 21.

Abstract: A collector 3 that collects particles P contained in a fluid includes: a bent pipe 31 that guides the fluid flowing from a first direction X in a second direction Z; a branch pipe 32 that causes the fluid guided in the second direction Z to branch into the second direction Z and a third direction Y; a collection pipe 34 in which the particles P in the fluid guided in the second direction Z by the branch pipe 32 are collected; and a reduction-expansion pipe 33 which is arranged between the bent pipe 31 and the branch pipe 32 and of which the flow path is narrowed while being biased to an inlet side of the bent pipe 31.

Abstract: The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a plurality of spray nozzles 15 into a flue gas duct 13 at the downstream of the boiler 11; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 by using a limestone-gypsum slurry 21. The NH4Cl solution supply means 16 supplies the NH4Cl solution 14 from the spray nozzles 15 so as to prevent the NH4Cl solution 14 from being adhered to an inner wall of the flue gas duct 13 through which the flue gas 12 is flowing.

Abstract: The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a plurality of spray nozzles 15 into a flue gas duct 13 at the downstream of the boiler 11; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 by using a limestone-gypsum slurry 21. The NH4Cl solution supply means 16 supplies the NH4Cl solution 14 from the spray nozzles 15 so as to prevent the NH4Cl solution 14 from being adhered to an inner wall of the flue gas duct 13 through which the flue gas 12 is flowing.

Abstract: An air pollution control device is an air pollution control device for reducing the amounts of NOx and Hg contained in flue gas 12 from a boiler 11. The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a spray nozzle 15 into a flue gas duct 13 at the downstream of the boiler 11; a mixer 17 provided on the downstream side of a region where NH4Cl is gasified, for promoting mixing, with the flue gas 12, HCl and NH3 which are generated when NH4Cl is gasified; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 using a limestone-gypsum slurry 21.

Abstract: The invention provides a wind turbine generating apparatus capable of controlling a temperature in a rotor head. In a wind turbine generating apparatus in which a driving/generating mechanism coupled to a rotor head having wind turbine blades attached thereto is housed in a nacelle, and control devices are housed in a hub of the rotor head, an air circulation guide is provided for allowing air to circulate between an inside of the rotor head and an inside of the nacelle via a communication path formed between the rotor head and the nacelle.