SU66333A1 - Combustion device - Google Patents

Description

It was filed on April 11, 1944 for N ° 250 (332723) in the State Planning Committee of the USSR SNK

Published in the bulletin "Inventions, industrial images, trademarks L 1 for 1967

The invention relates to the field of chain grill furnaces, operating with lower ignition of the fuel and its top loading onto the grill with a mechanical feeder, gasification of the fuel in the bed and burning out of the generated gas in the cold chamber by injecting secondary air into it.

The subject matter of the invention is the implementation of a two-stage layer combustion of all fuel entering the furnace using the lower ignition method.

A distinctive feature of the proposed device is the use of a limiting beam, designed to maintain the fuel advance of the injection point, to blow into the bed, in order to create a primary lower ignition in the front part of the fuel grate, and a split beam, to obtain a consistent lower kindling of the entire fuel in parts by dividing it into two streams.

FIG. 1 shows a diagram of a firebox with a mechanical imitator; in fig. 2 - the same, with the fuel hose and with the removal of gases from the front of the combustion chamber into the channels between the walls of the sleeve and the masonry; in fig. 3 - the same, with the use of dissecting beams.

Fuel from chute 1, fitted with a bolt 2, is fed into the furnace by a feeder 3 through a loading slot 5 located above the front part of the chain grille 6. To adjust the fuel supply, the feeder is equipped with a regulator 4. The drive of the feeder can be performed either from the grille shaft or independently .

Under the loading slot 5 inside the combustion chamber, chilled beams 8 and 9 are formed, forming an incendiary firebox 7, through which only part of the fuel passes (the first fuel flow, conventionally shown in the drawing by the dotted line). Rest

.№ 66333

the fuel (the second fuel stream) separated by the separating beam 9 passes to the central part of the chain grille, mine the firebox. The total thickness of the layer on the grid is limited by the slam-bar 10.

Ignition of the fuel in the incendiary occurs sequentially, first only part of the first fuel stream is ignited, and then all the fuel located between beams 8 and 9. To do this, limit the beam 8 is set so that the fuel that falls from under its lower edge onto the chain web lattice, ahead of the place of entry into the layer of blast air by some necessary and nominal value, which ensures the counter movement of fuel and gas-air flow at this advanced section.

Due to the presence in the front of the chain grid, a primary focus of independent lower ignition is created in such a way as a counter-current section. The primary focus is advanced further by the lattice with the help of a leading section on along with the firebox, which causes the lower ignition of all the fuel located in it.

In turn, a part of the coke kindled in the firebox is advanced by the grid into the central one along with securing the lower ignition of the second fuel stream. Thus, on the one hand, stable lower ignition of all fuel is achieved due to successive increase of the small primary chamber obtained at the leading section, and as a result, the lattice load is evenly loaded along its length and, on the other hand, the size of the incendiary firebox is sharply reduced with bulky front-wall chambers of known designs. In addition, the height of the fuel heap in the firebox is significantly reduced, which makes it easier to blow this heap and allows the use of large blow forces. Beam 8 also prevents the fuel blockage of the front of the firebox.

To reduce the thickness of the layer of fuel in the firebox and facilitate its blowing, a dissecting beam // is used (see Fig. 3), installed under the loading slot on the path of falling fuel.

The furnace is ignited by raising fires at the advance site and on the cross of the firebox, after which it is loaded with fuel and purged.

Front fire-open doors are used for raising fires. In order to prevent slagging of the layer, the blowing air supplied under the layer should be diluted with steam or flue gases.

The secondary air for the afterburning of the combustible gas generated in the bed is supplied through the duct 13 and injected into the firebox with nozzles.

Subject invention

1. A heating device with a chain grille operating with a lower ignition of fuel and its top loading onto the grid with the help of a mechanical feeder, fuel hose, etc., performing gasification of the fuel in the bed and burning off the generated gas in the combustion chamber with secondary air, characterized in that, in order to create a primary center of the lower ignition in the front part of the chain grille, a beam is used, designed to maintain the invariance of the fuel ahead of the injection point into the layer.

2. The device on c. 1, characterized in that, in order to reduce the size of the primary focus of the lower ignition and to achieve an equal-energy load of the lattice along its length, a separation beam is used, located between and below the limiting and cutting beams, and designed to avoid the consistent lower ignition of all fuel in parts by dividing it into two streams.

3. The device according to PP. 1 and 2, characterized in that, in order to reduce the height of the fuel layer in the incendiary fire chamber, to facilitate its blowing, a dissecting beam is used, which is installed under the loading slot in the path of the fuel falling.

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