초록 ▼

The present invention is directed to a fluidized-bed combustion apparatus provided with a U-shaped combustion zone. A cyclone is disposed in the combustion zone for recycling solid particulate material. The combustion zone configuration and the recycling feature provide relatively long residence tim

The present invention is directed to a fluidized-bed combustion apparatus provided with a U-shaped combustion zone. A cyclone is disposed in the combustion zone for recycling solid particulate material. The combustion zone configuration and the recycling feature provide relatively long residence times and low freeboard heights to maximize combustion of combustible material, reduce nitrogen oxides, and enhance sulfur oxide reduction.

대표청구항 ▼

A fluidized-bed combustion apparatus comprising: a housing; perforated grid means disposed in said housing for providing an upper chamber and a lower plenum chamber; inlet means for conveying a fluidizing and combustion supporting medium into the plenum chamber for passage through the perforated gri

A fluidized-bed combustion apparatus comprising: a housing; perforated grid means disposed in said housing for providing an upper chamber and a lower plenum chamber; inlet means for conveying a fluidizing and combustion supporting medium into the plenum chamber for passage through the perforated grid means into the upper chamber; vertically oriented partition means disposed in said upper chamber and extending from a sidewall of said housing and terminating at a location adjacent to an oppositely disposed sidewall of said housing to provide a passageway between said oppositely disposed sidewall and the partition means for defining a horizontal generally U-shaped fluidized-bed combustion zone; inlet and outlet means for respectively introducing solid combustible particulate material into the combustion zone and for discharging spent material from the combustion zone and with said inlet and outlet means being disposed on opposite sides of the partition means; solid particulate material and gas separating means disposed in said upper chamber and arranged to receive gas and combustible particulate material from a portion of the combustion zone on one side of said partition means near the outlet means and convey the particulate material when separated into another portion of the combustion zone on the opposite side of the partition means; and discharge conduit means penetrating said housing and coupled to said separating means for receiving essentially particulate-free gas from the combustion zone.