Patent ID: 6245314
Filing Date: 2001-06-12
Classification: B01D,B01J,C01F,Y10S

Abstract:
An operating method of a CaS oxidation apparatus, comprising:forming a first fluidized bed and a second fluidized bed on an outer side of the first fluidized bed by partially partitioning an interior of the CaS oxidation apparatus with a partition that separates an inner side of the GaS oxidation apparatus from an outer side;establishing a space portion above the first and second fluidized beds;receiving particles in the first fluidized bed from the second fluidized bed through an area below the partition and blowing an oxygen-containing oxidizing gas in through a nozzle to fluidize the particles;supplying a fuel through a nozzle and burning the fuel so that CaS contained in the particles is oxidized;pulverizing and abrading the particles in the first fluidized bed with at least one of a heat exchanger and a baffle plate in the first fluidized bed to generate a pulverized and abraded fine powder;discharging a completely oxidized coarse powder outside of the oxidation apparatus;supplying a desulfurizing agent into the second fluidized bed through a particle supply pipe;fluidizing CaS-containing particles that have fallen from the space portion into the second fluidized bed and oxidizing the CaS-containing particles into CaSO.sub.4 with oxygen-containing oxidizing gas;entraining fine powder from the first fluidized bed into the space portion above the first and second fluidized beds such that a major part of the fine powder that is entrained falls down into the second fluidized bed and elutriating remaining particles with gas from the first fluidized bed and the second fluidized bed and discharging them outside of the oxidation apparatus; andcontrolling the temperature on the outer side of the partition with a heat exchanger disposed in one portion of the second fluidized bed, the second fluidized bed further having another portion without a heat exchanger.