cyclone furnace


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cyclone furnace

[′sī‚klōn ‚fər·nəs]
(engineering)
A water-cooled, horizontal cylinder in which fuel is fired cyclonically and heat is released at extremely high rates.

Cyclone furnace

A water-cooled horizontal cylinder in which fuel (coal, gas, or oil) is fired and heat is released at extremely high rates. When firing coal, the crushed coal is introduced tangentially into the burner at the front end of the cyclone (see illustration). About 15% of the combustion air is used as primary and tertiary air to impart a whirling motion to the particles of coal. The whirling, or centrifugal, action on the fuel is further increased by the tangential admission of high-velocity secondary air into the cyclone.

Schematic diagram of cyclone furnaceenlarge picture
Schematic diagram of cyclone furnace

The products of combustion are discharged through a water-cooled reentrant throat at the rear of the cyclone into the boiler furnace. Essentially, the fundamental difference between cyclone furnaces and pulverized coal--fired furnaces is the manner in which combustion takes place. In pulverized coal–fired furnaces, particles of coal move along with the gas stream; consequently, relatively large furnaces are required to complete the combustion of the suspended fuel. With cyclonic firing, the coal is held in the cyclone and the air is passed over the fuel. Thus, large quantities of fuel can be fired and combustion completed in a relatively small volume, and the boiler furnace is used to cool the products of combustion. See Boiler, Steam-generating unit

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Hot gases from the gasifier were burned in the compact vertical cyclone furnace [18].
Combustion of cleaned gases in the wet-bottom vertical cyclone furnace guaranteed complete combustion of gases and high separation of ash from combustion products--95-98%.
Adelanto, California, has introduced the Cyclone furnace, which was designed for both continuous and batch melting aluminum operations as a durable refractory-lined furnace that does not use crucibles.
Bailey's boiler meters, his pioneering work on watercooled walls for furnaces, and the design of the cyclone furnace for pulverized coal--he held more than 100 patents over his 60-year career--were the product of his singular focus: how to burn coal more efficiently in boilers.
Global installed capacity for cyclone furnaces based coal fired power generation is expected to reach 614.
9, 1998--The Babcock & Wilcox Power Generation Group has been awarded a contract by Allegheny Power for the replacement and upgrade of five cyclone furnaces at the Willow Island, West Virginia Plant.