SU1245806A1 - Combustion chamber - Google Patents

Description

The invention relates to a power system and can be used in furnaces with combustion of fuels in a bed, for example, in water tube boilers.

The aim of the invention is to improve the economy by reducing heat loss from mechanical underburning.

FIG. 1 Dan boiler with a furnace, a longitudinal section; in fig. 2 - the upper part of the furnace with a double-slope cascade of ribbons, transverse section; in fig. 3 shows an embodiment with placement of tapes in the slopes of the cascade with partial overlap in the light; in fig. 4 is an embodiment with an arrangement of extreme tapes with a slope.

In the combustion chamber 1, the spreader 3 supplies fuel to the grate 2, the combustion products from the chamber 1 together with the fuel particles are directed to the exit window 11. On its way, the gas flow encounters the belts 5 and 6, which stepwise overlap the inlet section crush and turn from vertical to horizontal and again to vertical. In this case, large particles of fuel, striking the pipes of the belts 5 and b, are reflected back to the grille 2. The smaller particles of the TopTopka contain a combustion chamber I from the fire, subject to the hydrodynamic spiky grid 2, the spreader 3 well, together with gas flow is directed and placed at the outlet of the separation grid 4, formed by a bundle of heat exchange tubes, grouped into tapes 5 and 6,

in the horizontal openings 7 between the belts 5 and 6. Particles of fuel with a certain mass, at the expense of the centrifugal with vertical staggered forces, tend to maintain their trajectory relative to adjacent belts and the direction of movement and separate

the development of a cascade, for example, a dual slope

as well as intermediate openings 7. Extreme

tapes 6 are made gas-tight and placed with the formation of slots 8 with a corresponding change in its direction from horizontal to vertical. Separated from the flow, such particles are directed towards the side walls 9 by the camting walls 9 of chamber 1. In the lenses 25, when they come into contact with them 5, the tubes are located with the gaps 10, they lose their energy and flow down the walls less than the size of the openings 7. The offset tapes 5 and 6 relative to each other can be performed by breeding them into a festoon.

The extreme tapes 6 can be horizontal or tilted (FIG. 4) towards the walls 9 of the chamber 1 at an angle to the horizontal of 60 °. Tapes 5 and 6 can be arranged without overlap in the light (Fig. 2) and with partial overlap {Fig. 3 and 4). The combustion chamber 1 through the separation reconstruction of the slots 8. This allows, taking into account the rod 4 and the exit window 11, passing through the minimum gas flow rates in the near width of chamber 1, communicated from the industrial area and convection ducts 12 and in it to organize the return of fuel particles 13, in the latter of which are installed through the slots 8 into the chamber 1.

cam 9 down, where, through the slots 8 between the walls 9 and the extreme gas-tight ribbons 6, the fuel particles again enter chamber 1 and are burned.

In order to allow the return of unburned fuel particles from the vertical intermediate duct 12 to chamber 1, the lower end tapes 6 are gas-tight as a solid surface and are installed at walls 9

packages 14 convective heating surfaces.

The furnace works as follows.

In the combustion chamber 1, the spreader 3 supplies fuel to the grate 2, the combustion products from the chamber 1 together with the fuel particles are directed to the exit window 11. On its way, the gas flow encounters the belts 5 and 6, which stepwise overlap the inlet section crush and turn from vertical to horizontal and again to vertical. At the same time, large particles of fuel, striking pipes of belts 5 and b, are reflected back to lattice 2. Smaller particles of fuel, subject to hydrodynamic law, are directed along with the flow of gases

pits 1, in contact with which they lose their energy and flow down the walls

Taking into account the slits 8. This allows, taking into account the minimum flow rates of gases in the wall area and the exclusion of wiring in it, to organize the return of fuel particles through the slits 8 to chamber 1.

cam 9 down, where, through the slots 8 between the walls 9 and the extreme gas-tight ribbons 6, the fuel particles again enter chamber 1 and are burned.

In order to allow the return of unburned fuel particles from the vertical intermediate duct 12 to chamber 1, the lower end tapes 6 are made gas-tight as a solid surface and are installed against walls 9 with

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Compiled by N. Kolesnikova

Tehred I. Veres Corrector A. Zimokosov

Circulation 514Subscribe

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 TOPKA containing a separation lattice installed at the outlet of the combustion chamber, formed by a bundle of heat exchange tubes grouped into ribbons arranged vertically displaced relative to adjacent ribbons and forming intermediate openings, the extreme bundle ribbons being gas-tight and placed with the formation of slots with corresponding chamber walls, characterized the fact that, in order to increase profitability by reducing incomplete burning when the grill is located above the chamber, the pipes in the remaining tapes are located with gaps whose dimensions are smaller than the dimensions of the openings between the tapes, and the latter are placed stepwise and with the formation of a cascade. Figure 1 1245806 A1