Ash melting furnace and ash melting method thereof

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• an oxygen-enriched burner to melt the ash supplied from said ash supply port, the supplied ash being pushed forward along an inclined floor towards a drain port provided at a far end of said inclined floor to drain the molten slugs;
• a combustion control device, comprising:
• a monitor to monitor a volume or a drain velocity of outflow of the molten slugs at said drain port;
• a calculator to calculate a control signal, based on a result from comparing said monitored volume or drain velocity with preset value, either for quantity of the ash supplied or quantity of heat produced by said oxygen-enriched burner;
• and
• a controller to control either the quantity of ash supplied or the quantity of heat produced by said oxygen-enriched burner in response to the control signal from said calculator.

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• an oxygen-enriched burner to melt the ash supplied from said ash supply port, the supplied ash being pushed forward along an inclined floor towards a drain port provided at a far end of said inclined floor to drain the molten slugs;
• and
• a guide wall on a dike for assuring fluidity of the molten slugs at said drain port,
• wherein said dike is continually straight or curved and width is gradually narrowed towards said drain port.

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• and
• a pusher to push the ash on an inclined floor supplied from said ash supply port towards a region covered by radiant heat from a burner for melting the ash, wherein said pusher has a pushing surface provided at an end thereof, and a shape of sides of said pushing surface is different from a shape of a central portion of said pushing surface in order to supply the ash efficiently to the region covered by the radiant heat of said burner,
• wherein the central portion of said pushing surface is higher than the sides of said pushing surface, or said central portion is formed flat and the sides have a backwardly inclined surface in order to supply the ash efficiently to the region covered by the radiant heat of said burner.

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• and
• a pusher to push the ash on an inclined floor supplied from said ash supply port towards a region covered by radiant heat from a burner for melting the ash, wherein said pusher has a pushing surface provided at an end thereof, and a shape sides of said pushing surface is different from a shape of a central portion of said pushing surface in order to supply the ash efficiently to the region covered by the radiant heat of said burner,
• wherein the central portion of said pushing surface drops away towards a center of said pusher to form a concave pushing surface, so that said pushing surface is directed towards a center line which passes through a middle of the region of radiant heat.

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• a burner to melt the ash supplied from said ash supply port, the supplied ash being pushed forward along an inclined floor towards a drain port provided at a far end of said inclined floor to drain the molten slugs;
• and
• an ash feeder system to continuously feed the ash from said ash supply port along said inclined floor, said ash feeder system comprising a first ash feeder oriented lengthwise along said inclined floor from said ash supply port, and a second ash feeder oriented vertically above said ash supply port.

An ash-melting furnace, comprising:

• an ash supply port to supply ash provided at one end of said furnace;
• a slug discharge port to discharge molten slugs of the ash at another end of said furnace;
• a burner to melt the ash supplied from said ash supply port, the supplied ash being pushed forward along an inclined floor towards a drain port provided at a far end of said inclined floor to drain the molten slugs;
• an ash feeder to continuously feed the ash from said ash supply port along said inclined floor, said feeder being provided in said ash supply port;
• and
• an adjustable gate along a wall of said ash supply port for adjusting the height of a layer of said ash on said inclined floor.

An ash-melting furnace, comprising:

• at least two ash supply ports to supply ash provided at an upper end of said furnace, the first ash supply port being used for supplying primary ash, the second ash supply port being used for supplying fly ash (ash containing minute particles), said primary and fly ash forming a two-tiered layer of ash on an inclined floor, said first and second ash supply ports being arranged in such a way that the fly ash forms a lower layer of said two-tiered layer, and the primary ash forms an upper layer on said lower layer of fly ash;
• a slug discharge port-to discharge molten slugs of the ash at the other end of said furnace;
• and
• a burner to melt the fly and primary ash supplied from said at least two ash supply ports, the supplied ash being pushed forward along said inclined floor towards a drain port provided at a far end of said inclined floor to drain the molten slug.

An ash melting method to melt ash, comprising a step of:

• supplying primary ash (ash containing rough particles) from an upper end of said furnace to form an upper layer of a two-tiered layer of ash;
• supplying fly ash (ash containing minute particles) from the upper end of said furnace to form a lower layer of the two-tiered layer of ash;
• moving the two-tiered layer together towards the far end of said furnace, and heating and melting said two-tiered layer by a burner to form molten slugs during said moving step;
• and
• discharging said molten slugs from a slug discharging port at the other end of the furnace.