SU118101A1 - Firebox with vertical burning mirror - Google Patents

Description

Existing combustion chambers with a vertical combustion mirror formed by a clamping grille do not provide a good way to move fuel with air during the burning process. Suspension of fuel, as well as the burning of the slag in such furnaces is slow and not complete.

In the furnace described, these drawbacks are eliminated by the fact that the combustion chamber is located in the blowing box and is formed by two vertical clamping slats, between which the fuel layer moves. Such an embodiment of the device ensures good blowing of the fuel with air during its combustion. For pre-suspension the fuel enters the chamber through the platforms or pipes located: in the combustion space. The flue gases from the chamber are discharged into the topo space through the side windows of the lower shaft, through which the shlak is lowered into the crusher. Gases, washing the slag, contribute to the good burning of the coke remaining in it.

FIG. 1 schematically shows a furnace in a longitudinal section; in fig. 2-furnace in cross section; in fig. 3 and 4 variants of the furnace in cross section.

The furnace is intended for burning in a layer of solid heat with a very high content of fines and moisture (ARSH, brown coal, freztorf, etc.), arranged with a DVK-6.5 / 13 boiler, but it can also be combined with boilers. other designs.

The design and operation of the firebox is as follows: the fuel from the fuel bunker / through the chute 2 enters first into the fuel distribution manifold 3 and then into the pipes 4. The chamotte pipes 4 are installed on the blow box consisting of four blow boxes 5. In the box there is a chamber combustion 6, formed by two vertical clamping grids 7, each of which consists of two halves, located one to the other at a small angle.

Air to the grates is supplied through ducts 8 of the common duct 9 connected to the blower fan. The grates can be assembled from standard plate grates or cast in the form of a single cast-iron grate. Adjustment of the air supply to the blow boxes is carried out by means of # 118101

throttle flaps 10. Outside the blow boxes are lined with chamotte brick.

Slagging is carried out in channel 11, which connects the combustion chamber with slag bunker 12. Slagging rolls 13 are placed at the entrance to the bunker. From the bunker 12, slag is removed through the slag gates 14 into a trolley or CKjDenepHyro ditch.

Before entering the combustion chamber, the fuel is heated for a certain period of time in highly heated chamotte pipes. Combustion in the chamber, the fuel burns in the channel //, where the slag burns out. Combustion products through windows 15 enter the furnace volume and further into the boiler ducts.

The fuel path, consisting of fireclay pipes, a collector, an estrus, and a fuel bunker, always completely filled with fuel, is an irresistible resistance to the inverse of small fuel fractions and flue gases.

The specific feature of the furnace is the intensive air treatment of the burning layer of fuel in the chamber. A layer of fuel, clamped on both sides by grates, due to their special arrangement (forming a diamond shape in cross section) is blown towards the exit of gases from the chamber, which, along with the aerodynamic stability of the burning layer of fuel, allows significant force forcing. .

When burning in the furnace of highly slagging fuels, instead of the lower shaft with windows, screen pipes 16 can be installed, which are included in the boiler circulation (Fig. 3). In this case, flue gases from the chamber to the combustion chamber will pass between the screen tubes.

Instead of fireclay pipes 4, a solid shaft of rectangular cross-section made of fireclay bricks can be used. In this case, the height of the mine corresponds to the height of the thin. Alternatively, a device is provided under the boiler for a remote firebox. In this case, the supply of fuel to the shaft or pipe of the molset should be carried out through a bunker placed above the furnace ceiling (Fig. 4).

Subject invention

A vertical combustion mirror for burning predominantly shallow and moist fuel, characterized in that, in order to improve the combustion and burning of slag, its combustion chamber is located in the blowing duct formed by two vertical grids and communicated in the upper part with a heated supply shaft fuel, and at the bottom - with a mine, in the walls of which there are windows for flue gas removal into the furnace volume and further into the boiler chimneys.

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