MULTICHAMBER DIVISION TYPE FLUIDIZED BED FURNACE

摘要

Provided is a fluidized bed reactor which does not cause back mixing and has a proper difference in a fluidized bed height between upstream and downstream compartments. A vertical position of a connecting hole (9) for moving raw materials from an upstream side compartment to a downstream side compartment has a height which is 1/4 of a fluidized bed height or less, a length of the connecting hole (9) is 100 mm or more, in a case where a gas injecting nozzle injects a gas upward in an almost vertical direction, a distance (X) between an inlet of the connecting hole (9) and an end surface of an upstreame side nozzle is greater than 150 mm and a distance (X) between an outlet of the connecting hole (9) and an end surface of a downstream side nozzle is greater than 50 mm, in a case where the gas injecting nozzle injects a gas in an almost horizontal direction, the distance (X) between the inlet of the connecting hole (9) and the end surface of the upstream side nozzle is greater than 200 mm and the distance (X) between the outlet of the connecting hole (9) and the end surface of the downstream side nozzle is greater than 100 mm, in a case where the gas injecting nozzle injects a gas obliquely downward, the distance (X) between the inlet of the connecting hole (9) and the end surface of the upstream side nozzle is greater than 200 mm and the distance (X) between the outlet of the connecting hole (9) and the end surface of the downstream side nozzle is greater than 100 mm, and an angle formed by a line connecting a corner portion of an upper surface of the connecting hole (9) and a gas injecting port with respect to a horizontal plane is greater than an angle of repose of the raw material fines in any of openings on upstream and downstream sides of the connecting hole (9). <IMAGE>