METHOD FOR ESTIMATING ABRASION SPEED OF FLUID PARTICLES AND METHOD FOR PREDICTING PARTICLE SIZE DISTRIBUTION OF FLUID PARTICLES IN PRESSURIZED FLUIDIZED BED COMBUSTION DEVICE

• Main Authors: UEDA HACHIRO, GOTO HIDEKI, SAKUNO SHINICHI, SHIMIZU TADAAKI, SASAZU KOJI, MISAWA NOBUHIRO, SUZUKI NOBUYUKI
• Format: Patent
• Language: English
• Published: 26.02.2003
• Edition: 7
• Subjects: AIR; BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN; OPEN SINTERING OR LIKE APPARATUS; OVENS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RETORTS; STEAM BOILERS; STEAM GENERATION; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for estimating abrasion rate of fluid particles in a pressurized fluidized bed combustion device, and a method for predicting particle size distribution of the fluid particles in the pressurized fluidized bed combustion device, which enables prediction of desulfurizing performance and estimation of heat transfer coefficient to a heat exchanger, provides good workability by preventing working steps from becoming excessive in crushing and selecting particle size of a desulfurizer, and provides good stability and controllability of the fluidized bed. SOLUTION: The method for predicting particle size distribution of fluid particles in the pressurized fluidized bed combustion device comprises a step for measuring particle size distribution of supplied desulfurizer and obtaining weight fraction fj-1 of the desulfurizer having a particle size Dp ,j-1 , and a step for calculating weight W×wj-1 (t+Δt) of particles having a particle size D, which exist in the fluidized bed after lapse of time Δt, based on the weight fraction fj-1 , a supply speed F of the desulfurizer, particle weight W of the fluid particles that are present in the fluidized bed, and extraction weight B of the fluid particles extracted from the fluidized bed.