Evaluation of Minimum Fluidized Air Flow in Circulation Fluidized Bed Boiler at Garri (4) Power Plant

Abstract

Steam power plants are the most common electric power in the world. To reduce the cost of generation, Sudanese Thermal Power Generation Company (STPG) former National Electricity Corporation NEC has been built. Garri (4) steam plant has been used Circulation Fluidized Bed boiler (CFB) technology by burning sponge coke which is produced at Khartoum Refinery Company as byproduct. CFB technology depends on fluidization not only to increase the efficiency of heat transfer from sponge coke to water tube of stream but also to avoid over heating malting and phenomena pulsation. Sand is added to sponge coke to keep a certain temperature homogenizes spread in all Furnace surfaces. The focus of the research is to calculate the minimum fluidization velocity (the velocity at which all particles being to float) and bed particle size at corresponding to temperatures at different operation status. In this research study the minimum fluidization velocity by using applied equation method, practice method and then comparison between the two methods . Because these two methods are so difficult and complicated a computer program was built, and verified known data give immediately a good result of minimum fluidization flow corresponding bed particle size and temperatures compared between them and the manufactured values.