摘要:
A power generating equipment in which a plurality of cylindrical solid oxide fuel cell elements (28) are electrically connected to each other to constitute a collective cell and the collective cell is provided in a power generating chamber. Fuel gas supply means (27,40a) are arranged so that a fuel gas is supplied to the surface of each solid oxide fuel cell element (28) in the power generating chamber in an even manner in order to make small a temperature gradient due to a fuel concentration gradient in the chamber. Thereby, it can be prevented that cracks are generated in the solid oxide, and the unevenness of electrochemical reaction in the power generating chamber becomes small. The power generating efficiency is improved.
摘要:
A process for preparing a solidified material containing a coal ash comprises a first step of mixing the coal ash with a calcium compound to obtain a mixture, a second step of molding the mixture to obtain a molded article, and a third step of subjecting the molded article obtained in the second step to a hydrothermal treatment at a temperature of 120°C or more under a high pressure. In the first step, 40 to 95 parts by weight of the coal ash is mixed with 60 to 5 parts by weight of the calcium compound, and the coal ash to be used has a bulk density of 0.8 g/cm³ or more, an average particle diameter of 5 to 40 µm and an aluminum content of 35% by weight or less in terms of Al₂O₃. By the use of a blowing agent or the like, it is also possible to obtain a porous light-weight solid. In consequence, there can be obtained the solid containing the coal ash and having a high mixing ratio of the coal ash, an excellent dimensional stability to water, a high strength and a decreased unevenness of the strength, and this kind of solid can be applied to many fields as building materials, construction materials, artificial aggregates and the like. Furthermore, a laminated solid having not only the above-mentioned characteristics but also weight reduction properties can also be obtained, and this solid can be suitably applied to building materials such as panels, blocks, bricks and boards for accoustic use, artificial light-weight aggregates and the like. Accordingly, the coal ash which is an industrial waste can be effectively utilized in large quantities, so that the conventional hard and troublesome problem of treating the coal ash can be solved or relieved.
摘要:
An air electrode as a component of a solid electrolyte fuel cell. The air electrode is composed of a first layer (1) and a second layer (2). The first layer has an open porosity of 25% to 57%, pore diameters of 2.5 µm to 12 µm and a resistivity of less than 0.22 Ωcm. The second layer has an open porosity of 8% to 24%, pore diameters of 0.2 µm to 3 µm, and a ratio of the thickness of the second layer to the thickness of the air electrode is 2% to 28%. The sum of the thicknesses of the first and second layers is 0.7 mm to 3.0 mm. The materials of the first and second layers have perovskite structures selected from the group consisting of lanthanum manganate, calcium manganate, lanthanum nickelate, lanthanum cobalate and lanthanum chromate. A solid electrolyte fuel cell includes the air electrode as described above, a solid electrolyte film (3) formed on the surface of the second layer of the air electrode and a fuel electrode film (4) formed on the surface of the solid electrolyte film.
摘要:
A sealing member (6) for use in a gas preheater is adapted to seal a gap between an outer peripheral portion of a rotor and a housing in the gas preheater or a gap between a side face of the rotor and a radial sealing member. At least a part (6b) of said sealing member is made of an inorganic glass and/or a wear resistive ceramic having a coefficient of thermal expansion of not more than 70x10 -7 / C. A sealing member for use in a gas preheater may comprise a heat resistive ceramic, and a corrosion resistive steel, wherein the ceramic is substantially surrounded with the corrosion resistive steel, excluding a sliding surface of the ceramic.
摘要:
An optical fiber-containing insulator including an insulator body (1) having a through hole and an optical fiber inserted into the through hole (2) in which an insulation gas or an organic material (6) is filled in a middle portion (2-1) of the through hole is disclosed, which comprises wide-mouthed portions (2-2) arranged in both end portions of the through hole, cylindrical members (4) inserted into the wide-mouthed portions and heat-resistive adhesive agent member (7) arranged between the insulation gas or organic insulation material and the cylindrical member. The space between the cylindrical member and inner wall of the hole and the space between the cylindrical member and the optical fiber is sealed with an inorganic material (5). A process for producing such an optical fiber-containing insulator is also disclosed.
摘要:
A lightning arrestor insulator is provided having a discharge gap portion and an arrestor ZnO element device (5) both in the body of the insulator, comprising opposed projecting discharge electrodes (3a,3b) arranged inside the insulator body. The discharge gap portion is formed of a heat resistant protrusion (2) inside the insulator body surrounding the discharge electrodes (3a,3b), and a pair of metal plates and/or electrically conductive ceramic plates (4a,4b) sandwiching the protrusion (2) from both sides thereof and electrically connected to the discharge electrodes. The pair of plates (4a,4b) are joined and airtightly sealed to the protrusion via an inorganic glass (10a,10b). The arrestor has a highly reliable airtight fixing and sealing structure so that accidental troubles in a power supply or distribution line at a normal working voltage can be substantially eliminated, and damage caused by hygromeration and lightning can be noticeably decreased.