RU1802264C - Furnace - Google Patents

Abstract

Use: for burning solid fuel in boilers or in plants for the production of process gas. SUMMARY OF THE INVENTION: A furnace includes a combustion chamber (1) with a fuel feeder (18), a distribution grid (2) and a separation grid (5) located above it, made of a series of pipes (6) with protrusions (8) connected one end to the air source, and the other to the distribution grid (2). The pipes (6) of the separation grid (5) are made with holes (7), and the protrusions (8) of the pipes (6) are annular and autonomous for each pipe (6). In addition, the tubes (6) of the separation grill (5) are equipped with each noBopota adjustable drive around their eyes. 1 s.p. f-ly, 3 ill.

Description

FIG. 7

The invention relates to energy and can be used to burn solid fuel in boilers or in plants for the production of process gas.

The purpose of the invention is to increase the efficiency of burning unsorted solid fuel by uniformly distributing it over the area of the separation grid.

In FIG. 1 shows a general view of the furnace; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a view B in FIG. 2 ..

The furnace contains a fluidized bed chamber 1 with an air distribution grill 2 installed in the lower part, under which an air supply duct 3 is placed. Above the fluidized bed chamber 1 there is a layer combustion chamber 4 with a separation grill 5, consisting of pipes installed in parallel with the gaps b with holes 7. Pipes 6 overlap all cross sections of the furnace. Annular protrusions 8 are arranged on the pipes, the protrusions of one pipe entering between the protrusions of the second pipe. Pipes 6 are installed in the liners 9. At one end of the pipe 6, they enter the air manifold 10 connected to the fan 11 with an adjustable damper 12. On the other hand, sprockets 13 are mounted on the pipes 4, rotated by an adjustable drive, and the ends of the pipes with stuffing pipes 14 connected to the pipes 15 included in the box 3 and provided with shutters 16. The pipes 15 in the zone of the box 3 have windows 17. In the upper part of the layered combustion chamber 4 there are fuel spreaders 18. To remove ash, the chamber 1 is provided with a channel 19 and a conveyor 20.

The furnace works as follows.

Fuel by the casting device 18 is fed into the stratified combustion chamber 4 to the separation grid 5. The finely fractioned part of the fuel falls between the pipes 6 into the chamber 1. The air from the fan 11 is pumped into the manifold 10, from where it enters the pipes 6. Some of the air through the openings 7 is directed is introduced into the layer combustion zone above the separation grate, and the rest, cooling the pipe 6 and heating at the same time, enters through the windows 17

into the air supply duct 3. From the duct 3, air passes through the distribution grid 2, a fluidized bed of fuel, where fine-grained fuel is burned, and hot gases wash off the coarse-grained fuel layer on the separation grate 5. Pipes 6 are driven through the sprockets 13 rotation in one direction towards the ash removal channel 19. Croup

lumps of fuel move along the protrusions 8, burn out and fall between the pipes 6 into the fluidized bed chamber 1. Large non-combustible inclusions are directed into the channel 19 and removed from the furnace by conveyor 20.

The speed of rotation of the pipes 6 is regulated depending on the quality characteristics of the fuel and the heat output according to the condition of complete combustion. Damper

12 and 16, the amount of air supplied under the distribution grid 2 and into the combustion zone of the coarse fuel is regulated.

The use of the furnace provides efficient combustion of unsorted solid fuel by burning a large fraction of the fuel in the environment of hot flue gases with the addition of fresh air on the separation grill. During rotation

tubes of the separation lattice, equipped with annular protrusions, coarse fuel is moved, its uniform distribution over the area of the lattice.

Fore, Mule of the Invention

Claims (2)

1. A fluidized bed furnace containing a combustion chamber with a fuel feeder, a distribution grid and a separation grid located above it, made of a series of pipes with protrusions connected at one end to an air source and the other to a distribution grid, characterized in that, in order to increase the efficiency of the process combustion pipes of the separation grid are made with holes, and the protrusions of the pipes are circular and self-contained for each pipe. 2. Firebox pop. 1. On the assumption that the pipes of the separation grate are equipped with each adjustable rotation drive around its axes.