Abstract
Fluidized-bed (FB) and circulating fluidized-bed (CFB) boilers have some advantages compared with pulverized firing (PF) boilers. Advantages of fluidized-bed boilers are related to fuel properties, composition of exit flue gas, boiler efficiency and capital and O&M costs. Special attention in this field must be paid on comparing maintenance cost of boilers operating in different combustion modes. On the one hand, the cost of fluidized boilers is not high due to lack of rotation facilities, and corrosion intensity is low due to low combustion temperature, but, on the other hand, the maintenance cost can increase due to intensive wastage of both heat surfaces and canals supplying fuel and exiting flue gas. The present article deals with the wear problems in the boiler furnace. As a result of this work the dependence of erosion on the velocity of the mass flow during different operation times by moderate concentration of particles is given.
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