SU1733842A2 - Fluidized bed fire chamber - Google Patents

Abstract

Use: furnaces for burning coarse-grained solid fuels. SUMMARY OF THE INVENTION: The furnace contains guide vanes 7 installed between the pipes of the separation grid 3 with an inclination to the ash discharge nozzle, and the clear distance between adjacent blades 7 is equal to or greater than the clear distance between two adjacent pipes of the separation grid 3, which will allow evenly over the area of the separation grid 3, distribute coarse fractions of fuel, reduce local temperature distortions in the volume of the fluidized bed and prevent sintering of the layer. 2 Il.

Description

The invention relates to furnaces for burning coarse-grained solid fuels and is an improvement of the invention according to the author. St. No. 1368569.

In the main invention of auth. St. No. 1368569 in the volume of the fluidized bed (CS) is installed a sloping separation grid of pipes installed with a pitch ensuring non-penetration of large fractions of fuel. The separation grid is inclined from the front wall of the furnace to the ash discharge pipe,

The disadvantage of this furnace is insufficient reliability of operation, since as the height of the CS increases above the separation grid along its slope, the rate of movement of large particles along it decreases, which can lead to uneven distribution of large fractions of fuel along the grid. This can lead in turn to significant local temperature distortions and to sintering of the CS.

The purpose of the invention is to increase reliability by preventing sintering of the layer.

This goal is achieved in that the furnace additionally contains guide vanes installed between the pipes of the separation grid with a slope to the ash discharge pipe, and the distance in light between adjacent blades is equal to or greater than the distance in light between two adjacent pipes in the separation grid.

FIG. 1 shows the furnace of the COP; in fig. 2 — node I in FIG. one.

The firebox contains a combustion chamber 1 with CS 2, in the volume of which a separation grid 3 of cooled pipes is installed, an air distribution grid 4, a fuel feeder 5 mounted on the front wall, and a discharge pipe 6 mounted on the opposite wall at the level of the separation grid 3. Between the pipes of separation grid 3, transverse guide vanes 7 are installed

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with so

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with a step C of not less than the clearance between the pipes of the separation grid 3, directed towards the slope of the grid 3

The device works as follows.

Air for combustion of fuel is fed to the CS through the distribution grid A. Coarse-grained fuel is fed through the feeder 5 to CS 2. In this case, a large fraction of the fuel is deposited on the separation grid 3, since its size exceeds the gap between the pipes of the grid 3 and, moving along the latter, burns out in volume The upward flow of air, the passage through the guide vanes 7, changes its direction at the exit of the separation grid 3 from vertical to horizontal along the separation grid 3 towards the discharge pipe 6. This contributes to the stable movement of large particles along the separation grid 3 to the discharge pipe 6 Installing the blades 7 in increments of not less than the clearance between the pipes of the separation grid 3 ensures unhindered

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the medicinal circulation of the KS 2 particles through it.

The application of the invention makes it possible to distribute coarse fractions of fuel evenly over the area of the separation grid, to reduce local temperature distortions in the volume of the CS and to prevent sintering of the layer.

By reducing the number of emergency stops and accordingly starting the boiler, fuel economy is achieved.

Claims (1)

The invention of the fluidized bed according to ed. St. No. 1368569, characterized in that, in order to increase reliability by preventing sintering of the layer, it additionally contains guide vanes installed between the pipes of the separation grid inclined to the ash discharge nozzle, and the clear distance between adjacent blades is equal to or exceeds the distance in the light between two adjacent pipes of the separation grid. FIG.