Abstract: A method for removing nitrogen oxides and organic chlorine compounds from a combustion waste gas, which comprises the steps of: adding ammonia (NH.sub.3) as a reducing agent to a combustion waste gas containing nitrogen oxides and organic chlorine compounds; causing the combustion waste gas added with ammonia to contact with, while keeping the temperature of the combustion waste gas within a prescribed range, with a catalyst comprising at least one selected from the group consisting of platinum (Pt), palladium (Pd), ruthenium (Ru), manganese (Mn), copper (Cu), chromium (Cr) and iron (Fe) and oxides thereof, supported on the surface of a carrier comprising at least one selected from the group consisting of titanium oxide (TiO.sub.2), silicon oxide (SiO.sub.2), aluminum oxide (Al.sub.2 O.sub.3) and zirconium oxide (ZrO.sub.2), thereby removing nitrogen oxides and organic chlorine compounds from the combustion waste gas.

Abstract: A method for removing detrimental organic chlorine compounds such as polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans from a combustion waste gas, which comprises the steps of: bringing organic chlorine compounds contained in a combustion waste gas at a temperature within a range of from 150.degree. to 350.degree. C. into contact with a catalyst comprising at least one selected from the group consisting of platinum, palladium, ruthenium, manganese, copper, chromium and iron and oxides thereof, which catalyst is supported on the surface of a carrier containing at least titanium oxide, Aluminum oxide and silicon oxide, to cause a decomposition reaction of the organic chlorine compounds, thereby removing organic chlorine compounds from the combustion waste gas at a high efficiency.

Abstract: The present invention discloses a method of controlling combustion of a fluidized-bed incinerator. In a fluidized-bed incinerator (5), a method of controlling combustion of the fluidized-bed incinerator comprises measuring a supply rate of incineration waste by a supply rate measuring unit (11) using a photoelectric element (1) arranged on a shoot (2) for supplying incineration waste (3) from a dust feeder (4) to the incinerator (5), and when the supply rate of incineration waste is higher than a predetermined value, decreasing a supply rate of incineration waste of the dust feeder 4 to suppress a combusting operation, increasing an induced gas rate of an exhaust gas induced blower (9) of the incinerator to suppress an increase in an incinerator internal pressure decreasing a flow rate of fluidizing air of a forcing blower (7) to suppress a combusting operation, or increasing a flow rate of a blower (8) for supplying air to a free board portion to prevent production of an unburnt gas.

Abstract: The present invention relates to a method of measuring a supply rate of incineration waste in a fluidized-bed incinerator.The method is characterized in that a passing state of incineration waste ( 3) is detected by an photoelectric element ( 1) arranged on a chute ( 2) for supplying the incineration waste from a dust feeder (4) to an incinerator (5), and a rate of waste (w) is calculated from a detection signal from the photoelectric element in accordance with the following equation: ##EQU1## where w: supply rate of waste per unit time; m: the number of photoelectric elements; t: detection signal time per unit time; T: unit time; and A: constant.

Abstract: A prereduction furnace of a smelting reduction facility of iron ore includes of a fluidizing prereduction chamber at an upper part of the prereduction furnace wherein iron ores are fed and prereduced, a gas blowing chamber at a lower part of the prereduction furnace wherein a reducing gas is fed, a ceramic main body of a distributor mounted between the fluidizing prereduction chamber and the gas blowing chamber, a metal box attached to the bottom side of the ceramic main body, which prevent adhesion of dust in the reducing gas, nozzles passing through the ceramic main body and through the metal box for injecting the reducing gas in the blowing chamber, into the prereduction chamber and a discharge pipe for discharging prereduced iron ores mounted at a bottom center portion of the prereduction chamber and extending through the ceramic main body, through the metal box, and through a bottom of the gas blowing chamber.

Abstract: A prereduction furnace of a smelting reduction facility comprises a fluidizing prereduction chamber in the upper part of the prereduction furnace wherein iron ores are fed and prereduced, a gas blowing chamber installed in the lower part of the prereduction furnace wherein a reducing gas is fed, a distributor for separating the fluidizing prereduction chamber from the gas blowing chamber, and a discharge pipe for discharging the prereduced ore from the fluidizing prereduction chamber. The distributor includes a body of refractory material, a metal plate installed on the bottom of the body, nozzles passing through the body and the metal plate, metallic pipes inserted in the nozzles, and cooling pipes connected to the metal plate. A metallic box may be installed below the metal plate for providing passages for gas flow. A bottom plate may be installed spacedly below the metal plate, with nozzles passing therethrough. The distributor may comprise a rigid thick plate and a refractory layer thereon.

Abstract: A circulating fluid-bed combustion apparatus comprises a fluid-bed combustion chamber having a primary combustion air inlet and secondary combustion air inlet, the primary combustion air inlet arranged at the bottom of the fluid-bed combustion chamber and the secondary combustion air inlet being arranged in an intermediate portion of the fluid-bed combustion chamber; a layrinth separator for separating coarse particles from gases, which is positioned below the secondary combustion air inlet; a heat exchanger, into which combustion gases are led from the fluid-bed combustion chamber; a multicyclone for separating fine particles from gases discharged out of the heat exchanger; and a distributor for distributing particles separated in the multicyclone to an upper zone of the fluid-bed combustion chamber above the labyrinth separator and to a lower zone of the fluid-bed combustion chamber below the labyrinth separator.

Abstract: The coupling mechanism comprises a pair of spaced connecting rods secured to the stern of a barge and apparatus mounted on the tug for receiving the connecting rods. The rod receiving apparatus comprises a pair of vertical circular disc members each having a diameter smaller than the spacing between the connecting rods. Contact members are secured to the peripheries of the circular disc members to form a V shaped groove therebetween for receiving the connecting rods. The circular disc members are urged toward each other by a spring, and stop members are provided to limit the rotational movement of the circular disc members. A cushion member is provided to absorb the shock created when the tug and barge are coupled together. Further, a holding device is provided for holding the coupling mechanism in an operative state or in an inoperative state.