Taiyo Nippon Sanso Corporation

Tomoyuki Haneji

Yasuyuki Yamamoto

Yoshiyuki Hagihara

Kimio Iino

Shinichi Takahashi

Tomohiro Wada

Kiichi Kanda

Kenichi Watanabe

A burner combustion method is employed in which at least two burners () are disposed opposite each other in a furnace () so as to cause combustion, the method comprising: cyclically changing at least one of a flow rate of a fuel fluid and a flow rate of an oxidant fluid supplied to the respective burners () while cyclically changing a concentration of oxygen in the oxidant fluid thereby cyclically changing an oxygen ratio obtained by dividing a supply oxygen amount by a theoretically required oxygen amount, whereby, the burners () are made to cause combustion in a cyclical oscillation state, wherein with respect to the cyclical change in an oscillation state of the burners (), a phase difference is provided between a cyclical change in an oscillation state of at least one burner () and cyclical changes in oscillation states of other burners ().

Burner combustion method

The present invention provides a burner combustion method for supplying and combusting an oxidant stream and a fuel stream, wherein the oxidant stream is composed of a primary oxidant stream jetted from around the periphery of the fuel stream or from a position near the fuel stream, and a plurality of secondary oxidant streams, and by periodically changing the flow rate of at least one of the primary oxidant stream and the plurality of secondary oxidant streams, and also causing a periodic change in the oxygen concentration within the oxidant stream, causing a periodic change in the oxygen ratio which is calculated by dividing the supplied amount of oxygen, supplied by the oxidant stream, by the theoretically required amount of oxygen, and providing a difference between the periodic changes in the oxygen concentration and the oxygen ratio, the combustion state adopts a periodic oscillating state.

The object of the present invention is to provide a method for burning a burner which has NOx reduction effects and has practical value, and a device therefore; the present invention provide A method for burning a burner in a heating furnace including a step of: periodically changing at least one of a flow rate of a fuel fluid and a flow rate of an oxidizing agent fluid which are supplied to the burner while periodically changing an oxygen concentration in the oxidizing agent fluid, thereby an oxygen ratio which is calculated by dividing an amount of oxygen supplied by a theoretical necessary amount of oxygen is periodically changed, and the periodical change of the oxygen ratio is made different from the periodical change of the oxygen concentration to cause combustion in periodically vibrational conditions.

Method for burning burner

Disclosed is a process of producing a porous metal body containing a metal component which is likely to be oxidized, by which process the amounts of residual carbon and residual oxygen therein are decreased, and by which the performance of the product porous body can be largely promoted. The process for producing a porous metal body by sintering a material of the porous metal body, which material is obtained by coating a slurry containing a metal powder and an organic binder on an organic porous aggregate, comprises a defatting step of treating the material of the porous metal body at a temperature not higher than 650&#xb0; C. in an atmosphere containing carbon monoxide and carbon dioxide; a decarbonization step of treating the material of the porous metal body after the defatting step in an inert atmosphere or vacuum atmosphere at a temperature not higher than sintering temperature; and a sintering step of retaining the material of the porous metal body after the decarbonization step in an inert atmosphere, vacuum atmosphere, hydrogen atmosphere, or in a reducing atmosphere containing hydrogen gas and an inert gas at a temperature not higher than the melting point of the metal powder.

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Kai, Japan

Tomoyuki Haneji