Circulating fluidized bed boiler
Disposal of waste products by combustion
Coal beneficiation/combustion system
Plant for the combustion of impure solid fuel
System and method for firing coal having a significant mineral content
Method of controlling combustion Patent #: 4528918
ApplicationNo. 416312 filed on 09/13/1989
US Classes:110/347, Burning pulverized fuel110/204, Recirculation means110/232, Means for pulverizing solid fuel110/245, Fluidized bed of noncombustible particles110/263UTILIZING POWDERED FUEL
ExaminersPrimary: Favors, Edward G.
Attorney, Agent or Firm
Foreign Patent References
International ClassF23D 001/00
Foreign Application Priority Data1987-11-17 HU
AbstractA hybrid combustion system is provided combining advantages of a fluidized bed combustion portion and a pulverized coal combustion portion. The former portion includes a fluidized bed chamber, a coal mill without an air separator, a recycling duct connected to the coal mill, a coal supply duct, and a spray feeder. The fluidized coal combustion portion includes a pulverizing coal mill with air separator, a blowing duct for blowing ground coal, at least one pulverized coal burner and an air recycling duct for recycling combustion air. Fluidized bed combustion takes place in a lower part of the system and pulverized coal combustion takes place above the fluidized bed combustion. Each of the portions may be independently operated of the other. A main combustion chamber is common to both the fluidized bed portion and the pulverized coal portion. A related process is also described.