Title: The Midong thermal power plant 1069t/h CFB boiler in cogeneration of use and of operational problems
ABSTRACT
CFB boiler is in recent years in our country developed a kind of new burning equipment, while circulating fluidized bed combustion technology development with its high efficiency low pollution and high performance is improved by leaps and bounds. In the environmental protection request strictly today, CFB boiler has become the most promising combustion equipment, but compared with other CFB boiler, wear is more serious.
Circulating fluidized bed boiler wear is the normal operation of circulating fluidized bed boiler three threat (wear, coal feeding, flawed slag discharge difficult), because wear (one of the heating surface, header refractories, cap) causes of the boiler stop accident near boiler stop 50% of the total. In a very long time become influence circulating fluidized bed boiler popularization and application of the main obstacle.
Wear in engineering is often understood as due to mechanical causes of particle stripping off the material surface caused by didn't want a gradual change, such as thinning, craze. Boiler common wear namely high-speed ash particles from different angles scour collision heating furnace wall or caused by all kinds of changes. Has the material wear is introduced, and the smoke 3.22 times speed is proportional to the square, and with the increase of concentration of grey particles lattar. Single theoretically, to reduce wear be lowered flue gas velocity, decreasing ash particle concentration and reduce the grain diameter of particles.
This paper on circulating fluidized bed boiler in the operation of cold dregs device, the return of view of the abnormal and wear under the analysis of the problems, processing, puts forward the circulating fluidized bed boiler hearth of water-wall tubes wear mechanism and prevent grind, and measures of domestic circulating fluidized bed boiler put forward some prevention to wear the attention of the value of the problems of circulating fluidized bed boiler in operation of strengthening management have some help.
KEY WORDS: CFB boiler, Of operational problems,Wear, Environment protection