Vertical refuse incinerator for incinerating wastes and method for controlling the same

A vertical refuse incinerator for incinerating industrial wastes, including medical wastes, and general wastes, comprising:

• an incinerator body having a funnel-shaped lower side wall, a flame zone, a refuse layer, a glow layer and an ash layer being formed in this order inside the incinerator body from top to bottom at the time of combustion;
• an exhaust gas mixing device for spinning combustion gas that is made of a refractory, that is provided above the incinerator body and that has a plurality of secondary air blow holes for supplying secondary air for re-combustion formed therein, at least a part of the air blow holes being opened toward the flame zone in an upper portion of the incinerator body;
• a re-combustion chamber placed on the exhaust gas mixing device;
• a cooling casing covering the exterior of the funnel-shaped side wall;
• a plurality of primary air nozzles supplying primary air for combustion that are introduced into the incinerator body;
• a casing that is provided for the ash layer below the incinerator body and that houses retractable refuse supporting means and a closable bottom ash discharge plate disposed below the refuse supporting means with a clearance interposed between the refuse supporting means and the bottom ash discharge plate;
• and
• an air duct supplying air for final burning that is incorporated into the casing,
• wherein, at the time of discharging bottom ash, the refuse supporting means is projected into the ash layer so as to support the load of refuse and bottom ash deposited in the incinerator body, then the closed bottom ash discharge plate is opened so as to discharge the bottom ash retained between the refuse supporting means and the bottom ash discharge plate, followed by closing the bottom ash discharge plate, and then the refuse supporting means are retracted;
• and further comprising:
• a combustion control device for controlling, in accordance with the change in the temperature in the incinerator, an amount of supply of the secondary air, the final burning air, incinerator temperature cooling water and refuse, as well as temperature of an air pre-heater after completion of a combustion operation;
• a bottom ash discharge control device for operating the bottom ash discharge device under the condition that a temperature of the ash layer has decreased to a set value or lower after a set time has elapsed;
• and
• a dioxin-reducing device for completing re-combustion of exhaust gas by controlling the amount of air supplied from the secondary air blow holes formed in the exhaust gas mixing device, in such a manner that an average value of the concentration of carbon monoxide in the exhaust gas is not greater than a set value.

A vertical refuse incinerator for incinerating industrial wastes, including medical wastes, and general wastes, comprising:

• an incinerator body having a funnel-shaped lower side wall, a flame zone, a refuse layer, a glow layer and an ash layer being formed in this order inside the incinerator body from top to bottom at the time of combustion;
• an exhaust gas mixing device for spinning combustion gas that is made of a refractory, that is provided above the incinerator body and that has a plurality of secondary air blow holes for supplying secondary air for re-combustion formed therein, at least a part of the air blow holes being opened toward the flame zone in an upper portion of the incinerator body;
• a re-combustion chamber placed on the exhaust gas mixing device;
• a cooling casing covering the exterior of the funnel-shaped side wall;
• a plurality of primary air nozzles supply primary air for combustion that are introduced into the incinerator body;
• a casing that is provided for the ash layer below the incinerator body and that houses an inclined reversible grate that can be reversed from a horizontal position in which bottom ash is deposited and retained to a vertical position in which bottom ash is discharged;
• and
• an air duct supplying air for final burning that is incorporated into the casing;
• and further comprising:
• a combustion control device for controlling, in accordance with the change in the temperature in the incinerator, an amount of supply of the secondary air, the final burning air, incinerator temperature cooling water and refuse, as well as temperature of an air pre-heater after completion of a combustion operation;
• a bottom ash discharge control device for operating the bottom ash discharge device under the condition that a temperature of the ash layer has decreased to a set value or lower after a set time has elapsed;
• and
• a dioxin-reducing device for completing re-combustion of exhaust gas by controlling the amount of air supplied from the secondary air blow holes formed in the exhaust gas mixing device, in such a manner that an average value of the concentration of carbon monoxide in the exhaust gas is not greater than a set value.