초록 ▼

A fluidized bed reactor comprises a reaction column, gas inflow means for flowing a gas upwardly from the lower end of the reaction column, particle feed means for feeding particles to a lower part of the reaction column, and a cyclone. The cyclone includes a cyclone body having an inlet, a gas outl

A fluidized bed reactor comprises a reaction column, gas inflow means for flowing a gas upwardly from the lower end of the reaction column, particle feed means for feeding particles to a lower part of the reaction column, and a cyclone. The cyclone includes a cyclone body having an inlet, a gas outlet and a particle drop port, and a particle discharge pipe having an upper end communicating with the particle drop port of the cyclone body. A main fluidized bed of particles fed by the particle feed means is formed at the lower part of the reaction column, and a gas, which is to be discharged from the reaction column and which is accompanied by particles, is introduced from the inlet into the cyclone body and discharged from the gas outlet of the cyclone body. The particle discharge pipe of the cyclone communicates with the lower part of the reaction column. The cyclone further includes sealing means for feeding a sealing gas to the particle discharge pipe to generate a gas stream ascending through the particle discharge pipe, and to produce a sealing fluidized bed of particles separated from the gas in the cyclone.

대표청구항 ▼

[ What I claim is:] [1.] A cyclone comprising:a cyclone body having an inlet for introducing a gas accompanied by particles, a gas outlet, and a particle drop port,a particle discharge pipe having an upper end in communication with said particle drop port of said cyclone body,a sealing means for fee

[ What I claim is:] [1.] A cyclone comprising:a cyclone body having an inlet for introducing a gas accompanied by particles, a gas outlet, and a particle drop port,a particle discharge pipe having an upper end in communication with said particle drop port of said cyclone body,a sealing means for feeding a sealing gas to said particle discharge pipe to generate a sealing gas stream ascending through said particle discharge pipe, whereby the sealing gas stream produces a sealing fluidized bed that includes particles separated from the gas that entered through said inlet by said cyclone body, the sealing fluidized bed includes a top surface, anda flow rate adjusting means for controlling a linear velocity Ud of the sealing gas stream in said particle discharge pipe at said sealing means and indirectly controlling a linear velocity Uu of the sealing gas stream at the top surface of the sealing fluidized bed.