SU1241020A1 - Cyclone furnace - Google Patents

Description

This invention relates to fuel combustion and can be used in power and industrial installations.

The aim of the invention is to improve the economy by reducing underburning.

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

The cyclone furnace contains a cylindrical combustion chamber 1 with tangential nozzles 2 and 3 of the fuel and air supply, an axial exit window 4, and a tap 5. The combustion chamber 1 has a stepped extension 6 in its middle part. Step expansion 6 is made with a diameter (D) and a height (h) equal to 1.1 -1.4 and 0.1 -1.0 diameters (d) of the combustion chamber 1, respectively. The step expansion 6 may be separated from the exit window 4 at a distance (S) of 0.5-2 times the diameter of the chamber 1.

The cyclone furnace works as follows.

The air-fuel mixture is fed through the nozzle 2 into the combustion chamber 1. Since the nozzle 2 is set tangentially, the flow

acquires a circular, vrash, movement in its generatrix. When reaching the nozzle 3 of the secondary (hot) air, the fuel-air mixture receives an additional impulse of rotational motion and acquires an even greater velocity. In the same area, the fuel is ignited. In the process of moving the air-fuel mixture, large particles of fuel are pressed faster by centrifugal forces against the wall of chamber 1, and the larger the particle, the more forcefully it is pressed against the wall.

The passage is a stepwise expansion 6 of a larger diameter than the diameter of chamber 1, the large particles rotate in it with the gas flow until they lose some of their weight due to combustion and are replaced by other larger particles.

Thus, the expansion 6 allows large particles to be retained for a longer time in the combustion zone, thereby contributing to their complete combustion.

The products of combustion of fuel fall on the chambers 1, from where they are removed through the slag tap 5, and the flue gases are discharged through the window 4.

Srig.2

Make up. V. Kruglsky

Editor K. Vo.poshchukTehred I. Veres Corrector I. Erdeyi

Order 3475/33 Circulation 514 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

A CYCLONE HEATER containing a cylindrical combustion chamber with tangential nozzles for supplying fuel and air and an axial outlet window, characterized in that, in order to increase efficiency by reducing underburning, the combustion chamber has a stepwise expansion in the middle part with a diameter of 1.1 - 1, 4 times the diameter of the combustion chamber, and a height equal to 0.1-1.0 of the diameter of the chamber. Figure 1