US 5,295,449 AGranted

Dry distillation gasification combustion equipment, dry distillation gas generator, and combustion gas burner unit

AssigneeEmu Dee-Aru Co., Ltd.

InventorsNaomi Maeda, Seiichirou Sasahara

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Abstract

A dry distillation gas generator generates a dry distillation gas for burning in a separate combustion gas burner unit. Air is supplied in a gentle decelerated flow to the bottom of the dry distillation generator in a quantity sufficient to support combustion of a solid fuel in the vicinity of the air supply, but at a low enough volume to prevent the combustion proceeding to other parts of the generator, thus thermally decomposing the remainder of the solid fuel to generate the dry distillate gas. An air chamber surrounds the generator to reduce the temperature to which the solid fuel is exposed. Similarly, an air chamber is disposed below the bottom of the generator to supply air to the generator, and to moderate the temperature therein. An impurity separation tank in a conduit between the generator and the gas burner unit helps prevent particulates from entering the generator. A preheat burner in the combustion gas burner unit includes a pilot to ignite and preheat the gas. A first air injection device injects air from outside the gas burner in a spiral flow to agitate and mix the gas with air. A second air injection device injects air preheated in an air storage layer surrounding the gas burner unit into the gas burner in a spiral flow to further agitate and mix the gas with air. The injection point of the second air injection device is downstream of the injection point of the first air injection device.

Claims17

Dependent claims

A dry distillation gasification combustion equipment comprising:

a dry distillation gas generator;
said dry distillation gas generator including a tank furnace;
an air chamber in a bottom of said tank furnace;
an air blowoff section communicating from said the air chamber to a bottom portion of said tank furnace;
said air blowoff section including an air vent recessed portion bored in a bottom surface of said tank furnace, an air duct allowing for permitting air from said air chamber to pass to a center of said air vent recessed portion;
an air dispersion cap fitted into an opening of said air duct;
an upper surface of said air dispersion cap forming a portion of a bottom surface of said tank furnace;
a blowoff opening about a circumference of said air dispersion cap;
said blowoff opening supplying air from said air duct in a decelerated and dispersed state substantially uniformly into the tank furnace from said circumference of said blowoff opening;
said air softly and evenly spreading over the entire bottom surface of said tank furnace;
a fuel door in said tank furnace, effective for permitting entry of a dry fuel into said tank furnace;
said fuel door being openable and closeable;
a dry distillation gas outlet from said tank furnace;
a combustion gas burner unit;
a gas conduit conducting dry distillation gas from said dry distillation gas outlet to said combustion gas burner unit;
said combustion gas burner unit including a burner body;
a combustion chamber in said combustion gas burner unit receiving gas from said gas conduit;
said combustion chamber including a preheat burner section for igniting a pilot at a position close to an upstream end of said combustion chamber;
an air storage layer surrounding an outer circumferential surface of an intermediate portion of said combustion chamber;
a first air supply section skewed an angle for injecting air rotating in a spiral from the outside through a side wall of said combustion chamber;
a second air supply section skewed at an angle for injecting air in a spiral from said air storage layer through said side wall;
said air injected by said second air supply section being preheated in said air storage layer and injected in said combustion chamber at a position downstream of the injection of air by said first air supply section;
and
an impurity separation tank in said gas conduit at a position intermediate said tank furnace and said combustion gas burner unit for separating impurities from said dry distillation gas before applying it to said combustion gas burner unit.

21 more elements

A dry distillation gasification combustion equipment comprising:

a tank furnace;
means for entering a solid fuel in said tank furnace;
a cooling layer about a substantial portion of said tank furnace;
a bottom of said tank furnace including a triple layer structure including first, second and third layers;
said first layer including a heat resisting material;
said second layer including a cooling layer;
said third layer including an air chamber;
a plurality of air blowoff portions in said bottom;
each of said air blowoff portions an air vent recessed portion bored in said first layer and an air duct communicating air from said air chamber to said air vent recessed portion;
an air dispersion cap fitted into each air duct;
an upper surface of each air dispersion cap forming a portion of said first layer;
means for permitting air to pass said air dispersion cap substantially uniformly in a decelerated and dispersed state in a lateral direction into the tank furnace from a blowoff opening on a circumference of each air dispersion cap toward the lateral direction, the supplied air softly and evenly spreading over the entire bottom surface along the air vent recessed portion around the air dispersion cap;
a combustion gas burner unit;
said combustion gas burner unit including a burner body;
a gas conduit section connecting dry distillate fuel gas from said tank furnace to said combustion gas burner;
said burner body including a combustion chamber;
a preheat burner section at an upstream end of said combustion chamber;
a pilot in said preheat burner for igniting said dry distillate gas;
an air storage layer surrounding a substantial circumferential portion of said;
a first air supply section opening from the outside through a side wall of said burner body at an angle rotated in a spiral;
a second air supply section opening from said air supply layer through said side wall at an angle rotated in a spiral;
said first air supply section entering said burner body at a position upstream of a position where said second air supply section enters said burner body;
air in said air supply layer being preheated before being injected into said burner body;
and
an impurity separation tank at an intermediate position in said gas conduit for removing impurities from said dry distillation gas.

22 more elements

Dependencies are inferred from the claim text.