| 摘要 |
PCT No. PCT/FI90/00104 Sec. 371 Date Oct. 11, 1991 Sec. 102(e) Date Oct. 11, 1991 PCT Filed Apr. 11, 1990 PCT Pub. No. WO90/12253 PCT Pub. Date Oct. 18, 1990Heat is recovered from the hot solids discharged from the combustion chamber of a fluidized bed reactor. Hot solid particles as a result of combustion are removed either in the form of ash, or particles separated from a gas stream, and are passed into indirect heat exchange relationship with water, producing hot water. The hot water is mixed with fuel or other solid material to simultaneously heat and moisten the solid material (e.g. to a moisture content of 15-50%). The heated and moistened solid material is then fed into the combustion chamber, along with fluidizing air, to establish a fluidized bed in which combustion takes place. The heat exchange may take place in a closed heat exchange vessel, and the cooled solid particles may be discharged from the vessel through a pressure reduction valve. |
