SU1218245A1 - Cyclone furnace for combusting liquid finely divided fuels - Google Patents

Description

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The invention relates to the field of fuel combustion and can be used in warm power plants.

The purpose of the invention is to reduce underburning by returning unburned separated fuel to the front end of the combustion chamber of the firebox.

FIG. 1 schematically shows a cyclone furnace, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

A cyclone furnace for burning liquid and solid fine fuels contains a cylindrical lined combustion chamber G with an air jacket 2 and an exit window 3, a fuel supply device A and primary air swirler 5 installed on the front end 6 of the combustion chamber 1, and an additional cylindrical insert 7 adjacent to the exit window 3 and forming an annular channel 8 with the side wall of the combustion chamber 1, communicated by means of channel 9 with an air jacket 2. In the annular canape 8 there is a swirler Yu

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secondary air, and the distance from the front end of the insert 7 to the swirler 10 is 1.5-3.0 of the width of the annular channel 8. Chamber 1

the combustion has a length equal to 0.9– 2.2 of its diameter, and the insert 7 has an internal diameter equal to the diameter of the exit window 3. The air jacket 2 is provided with a nozzle 11 for

air intake.

The furnace works as follows. The fuel enters through the device 4 for supplying fuel to the combustion chamber 1, where it is picked up by the flow

the primary air coming from the jacket 2 through the swirler 5, and is burned in a vortex flare. Particles of unburned fuel separar | ots on the side wall of the combustion chamber 1,

whence the flow of secondary air coming from the channel 8 through the swirler 10 is returned back to the front end 6 of the combustion chamber 1. The secondary air in the swirler 10 is twisted in the opposite direction compared to the spin of the primary air in the swirler 5.

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Compiled by V.Kruglsky Editor S.Lisina Tehred A. Babinets Proofreader M.Samborska

Order 1122/49 Circulation 515 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

Claims (1)

CYCLONE FURNACE FOR COMBUSING LIQUID AND SOLID FINE FINE FUELS, comprising a cylindrical lined combustion chamber with an air jacket and an exit window, a fuel supply device and a primary air swirl installed on the front side of the combustion chamber, and a secondary air swirl, that, in order to reduce burnout by returning unburned separated fuel to the front end of the combustion chamber, the latter additionally has a cylindrical insert adjacent to the outlet window and forming with the side wall of the combustion chamber an annular channel in communication with the air jacket, and a swirl of secondary air is placed in this channel. at a distance from the front end of the insert equal to 1.5-3.0 width of the annular channel, while the combustion chamber has a length equal to 0.9-2.2 .fee diameters, and the insert is the inner diameter equal to the diameter of the output window. SU .., 1218245>