The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 1996
Filed:
Oct. 12, 1994
Timo Hyppanen, Karhula, FI;
Foster Wheeler Energia Oy, Karhula, FI;
Abstract
A circulating fluidized bed reactor has substantially vertical walls with cooling elements, defining the interior of the reactor chamber, and a device for introducing fluidization gas at the bottom of the fluidized bed reactor. Particulate material is introduced into the reactor. A separator separates particulate material from the exhaust gases, the separator being in connection with the reactor chamber. A return duct is connected to the separator. A bubbling fluidized bed is adjacent the reactor and provided with a heat exchanger for cooling particulate material, and side walls, rear and front walls having cooling elements in fluid communication with the cooling elements of the reactor chamber; and a discharge channel with a separate fluidizing gas source for discharging particles from the bottom of the bubbling bed to adjacent the top of the bubbling bed in the reactor chamber. A method of operating a circulating fluidized bed reactor, comprises the steps of maintaining a circulating fluidized bed in the reactor; separating particulate material from the gas in the separator and returning separated material back to the reactor; introducing particulate material into the bubbling fluidized bed above the upper surface of the bubbling fluidized bed; fluidizing the particulate material in the bubbling fluidized bed and recovering heat from the fluidized particulate material by the heat exchanger; discharging cooled particulate material from the bubbling fluidized bed at its lower section into the lower section of the discharge channel; fluidizing the discharged particulate material in the discharge channel; and introducing particulate material from the upper section of the discharge channel into the reactor chamber.