Patent ID: 7597751

Claim:
A carrier gas recycling system, which is included in a fluidized bed reaction system to recycle gas generated by the fluidized bed reaction system for use as a carrier gas needed by the reaction system, comprising: a reactor used to receive charges and combine the received charges with a carrier gas of the fluidized bed reaction system to generate a mixture and gas; a condensation tank used to receive the mixture and gas generated by said reactor, separate oil and water in the mixture from each other, and separate and purify the reaction-generated gas; a filtering unit connected to said condensation tank for filtering the reaction-generated gas and outputting the filtered gas via two paths at the same time; a constant pressure tank for receiving the filtered reaction-generated gas output from said filtering unit via one of the two paths, outputting the received gas for burning, and maintaining the system at a constant pressure balancing with the external atmospheric pressure; a transfer device for receiving the filtered reaction-generated gas output from said filtering unit via the other one of the two paths, and transferring the received gas back to said reactor, so as to form a circulation loop for the reaction-generated gas; a pre-heater for preheating the reaction-generated gas output from said transfer device before the gas is fed into said reactor; and a backup carrier gas tank connected to said transfer device and having an amount of the carrier gas stored therein, the carrier gas in said backup carrier gas tank being output to said transfer device to start and maintain the reaction system operation when the system has not yet generated gas.