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AssigneesNKK Corporation, Nippon Furnace Kogyo Kaisha, Ltd., NGK Insulators, Ltd.
InventorsYutaka Suzukawa, Isao Mori, Masayasu Nagoshi, Takeshi Tada, Jun Sudo, Yoshiyuki Kasai, Kazuhiko Umehara
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A heat treatment equipment having a heating chamber having a plurality of regenerative combustors provided with direct-fired burner having a built-in porous regenerator, for applying a heat treatment to an object in the heating chamber, wherein the substantial average surface pore diameter is not uniform for porous regenerators in a plurality of direct-fired burners or a plurality of regenerative combustors. By making contrivances in the shape of porous regenerators of the direct-fired burners or the regenerative heat exchangers arranged in an area where substances causing choking tend to easily adhere to make it difficult for such substances to adhere or prevent choking phenomenon from becoming apparent.
A heat treatment equipment comprising a heating chamber having a plurality of regenerative combustors having direct-fired burners each having a porous regenerator for applying a heat treatment to an object in the heating chamber;
An installing method of a porous regenerator built in a direct-fired burner provided in each of a plurality of regenerative combustors attached to a heating chamber in which a heat treatment is applied to an object carried in from outside;
A manufacturing method of an object heat-treated by arranging an object carried in from outside and/or carried out to outside in a heating chamber in a heat treatment equipment having the heating chamber provided with a plurality of regenerative combustors each having a direct-fired burner having a built-in porous regenerator, wherein the substantial average surface pore diameters of each of the porous regenerators in the plurality of direct-fired burners or the plurality of regenerative combustors are set so as not to be uniform, thereby operating the heat treatment equipment.
A heat treatment equipment having a space provided with a plurality of heat exchangers each having a built-in porous regenerator arranged along a flow direction of gas, wherein the substantial average surface pore diameter of each of the porous regenerators in said plurality of heat exchangers are not uniform.
An installing method of a porous regenerator in a heat treatment equipment provided with a space having a plurality of heat exchangers attached thereto each having a built-in porous regenerator arranged along the flow direction of gas;
A manufacturing method of a heat-treated object by arranging an object carried in from outside and/or carried out to outside in a heating chamber in a heat treatment equipment provided with a space having a plurality of heat exchangers attached thereto each having a porous regenerator, arranged along the flowing direction of gas, in a heating chamber;
A heat treatment equipment provided with a heating chamber having a plurality of regenerative combustor each having a direct-fired burner having a built-in porous regenerator for applying a heat treatment to an object in the heating chamber, wherein the substantial average surface pore diameter for a porous regenerator arranged at a lower position in the heating chamber as compared to each of the other porous regenerators is larger than the substantial average surface pore diameter of each or the other porous regenerators in the plurality of direct-fired burners or the plurality of regenerative combustors.
A heat treatment equipment, wherein a plurality of heat exchangers each having a built-in porous regenerator through which a gas flows;
A method of selecting a porous regenerator to be built in a direct-fired burner or a heat exchanger provided in a regenerative combustor, comprising the steps of measuring a decrease in the substantial average surface pore diameter of the porous regenerator occurring along with an increase in the operating period of time of the regenerative combustor or the heat exchanger, and building, in said direct-fired burner or said heat exchanger, a porous regenerator having a substantial average surface pore diameter calculated by previously adding a value corresponding to the difference between the thus measured value and a target value.
A component member of a used porous regenerator used by being built in a direct-fired burner provided in each of a plurality of regenerative combustors installed in a heating chamber provided in a heat treatment equipment, and having subsequently become used, wherein the substantial average surface pore diameter is not uniform for each of the porous regenerators prior to starting use thereof.
Dependencies are inferred from the claim text.