Abstract: Provided are a composite type heat insulator having an excellent heat insulating properties at high temperatures regardless of its thin body, and a method for producing the same. The composite type heat insulator comprises a first and a second cloths composed of silica fibers having a hydroxyl group; and a heat insulating layer sandwiched between the first and the second cloths. The heat insulating layer contains a silica aerogel and silica staple fibers having a fiber length of 0.5 to 5 mm. The heat insulating layer may optionally contain an infrared absorber and/or a film-forming inorganic binder.

Abstract: A drying system includes a nozzle attached to an air supply duct of a drying chamber that blows out heated air inside the duct toward an object to be dried inside the chamber. The nozzle includes a horn-shaped inner-side surface made of pairs of first and second inner-side surfaces that respectively face each other in first and second directions, an opening width of the second surfaces in the second direction gradually increasing forward in a direction in which the air is blown and being 2 to 25 times inclusive larger than an opening width in the first direction. The drying system includes: the duct with the nozzles; a feeding device feeding air to the duct; and a heating device heats the fed air. The feeding device feeds air to the duct such that the air blown out from the nozzle spreads more in the first direction than in the second.

Abstract: A drying system includes a nozzle attached to an air supply duct of a drying chamber that blows out heated air inside the duct toward an object to be dried inside the chamber. The nozzle includes a horn-shaped inner-side surface made of pairs of first and second inner-side surfaces that respectively face each other in first and second directions, an opening width of the second surfaces in the second direction gradually increasing forward in a direction in which the air is blown and being 2 to 25 times inclusive larger than an opening width in the first direction. The drying system includes: the duct with the nozzles; a feeding device feeding air to the duct; and a heating device heats the fed air. The feeding device feeds air to the duct such that the air blown out from the nozzle spreads more in the first direction than in the second.

Abstract: A thin and lightweight refractory insulating sheet comprising a refractory bag and a layered type thermal insulator in the bag is disclosed. The layered type thermal insulator comprises a thermal energy consumption layer, a reflector and a graphite layer, and can efficiently attenuate thermal energy by conducting the thermal energy in all directions of the plane even when locally heated, and utilizing the thermal energy for vaporization of the water generated from the thermal energy consumption layer.

Abstract: A method of exhaust gas denitration in which nitrogen oxides contained in a low-temperature exhaust gas are removed at a high NOx removal efficiency. A injection pipe (11) is disposed in a flue (10) for an exhaust gas (x) so that the pipe protrudes from the inner wall of the flue. A hydrocarbon compound (b) and a nitrogen compound (a) are supplied through the injection pipe (11) into the flue (10). The hydrocarbon compound (b) is burned to form a combustion region (s). In this combustion region (s), amine radicals are produced from the nitrogen compound (a). These amine radicals are mixed with nitrogen oxides contained in the exhaust gas (x) to reductively remove the nitrogen oxides.

Abstract: A denitration process for removing nitrogen oxides contained in low-temperature exhaust gas at a high denitration rate; namely, a denitration process for reductively removing nitrogen oxides contained in an exhaust gas (x) containing nitrogen monoxide and sulfur dioxide. The process comprises a preliminary step 2 of partially oxidizing nitrogen monoxide in the exhaust gas to form nitrogen dioxide, a radical formation step 3 of adding a nitrogen compound and a hydrocarbon compound to a high-temperature zone 22 to form amine radicals (r), and a denitration step 4 of mixing the amine radicals (r) with the pretreated gas (p) containing nitrogen monoxide and nitrogen dioxide that was discharged from the preliminary step 2. As a result, nitrogen oxides in the exhaust gas (x) are reductively decomposed.

Abstract: A denitration process for removing nitrogen oxides contained in low-temperature exhaust gas at a high denitration rate; namely, a denitration process for reductively removing nitrogen oxides contained in an exhaust gas (x) containing nitrogen monoxide and sulfur dioxide. The process comprises a preliminary step 2 of partially oxidizing nitrogen monoxide in the exhaust gas to form nitrogen dioxide, a radical formation step 3 of adding a nitrogen compound and a hydrocarbon compound to a high-temperature zone 22 to form amine radicals (r), and a denitration step 4 of mixing the amine radicals (r) with the pretreated gas (p) containing nitrogen monoxide and nitrogen dioxide that was discharged from the preliminary step 2. As a result, nitrogen oxides in the exhaust gas (x) are reductively decomposed.

Abstract: A method of exhaust gas denitration in which nitrogen oxides contained in a low-temperature exhaust gas are removed at a high NOx removal efficiency. A injection pipe (11) is disposed in a flue (10) for an exhaust gas (x) so that the pipe protrudes from the inner wall of the flue. A hydrocarbon compound (b) and a nitrogen compound (a) are supplied through the injection pipe (11) into the flue (10). The hydrocarbon compound (b) is burned to form a combustion region (s). In this combustion region (s), amine radicals are produced from the nitrogen compound (a). These amine radicals are mixed with nitrogen oxides contained in the exhaust gas (x) to reductively remove the nitrogen oxides.