SU16805A1 - Chain type firebox for burning fine low grade fuel - Google Patents

Description

The proposed furnace is intended for small, low-grade fuel and is aimed at achieving a more complete combustion with the help of mobile grates, which can carry it through the furnace several times.

In FIG. 1 and 2 depict a vertical section of the furnace; FIG. 3, 4, 5.6,7-parts of the grate elements.

The proposed furnace (Figs. 1 and 2) is an inclined hearth 13 chamber blocked by its 12 and in the upper and lower parts of the latter there are drums 2 driving chains 4 rotating from the pulley 25 in the sub-bearings 26. Plates 5 are inserted with slots 28 (FIG. 3-5) for air passage and grate elements 6 attached to them. Chains 4 and plates 5 and grates connected to them, b, are guided in their movement in parallel 3 (Fig. 1) extending obliquely or vertically in their lower and middle parts and curved in an arc to the side in to the loading bucket 7 at the top.

The fuel loaded into the ladle 7, equipped with a regulating shield 27, is fed into the channel 21, from where it enters the stove 15 into the combustion space, where it partially burns on the fly. The fuel particles that did not burn out roll down the inclined platform of the hearth 13 onto the grate elements b moved upwards by the endless chain 4, and some of these particles burn out, while the remaining larger particles, not income to the upper drum, fall back into the furnace and fall onto the grate for subsequent burning. Slag and ash left on the grate b elements rubbing the edges of the latter on the scraper 8 lag behind and through the hatches 17 and 18 are diverted into the tunnel 16. The air necessary for burning the fuel is blown through the pipe 10 in part of the chamber 9 and passes through the blower 22 in the slot 28 of the grate elements b, and also, if necessary, supplied through the channels 23 in the walls of the firebox. The kindling is carried out by firewood placed on under the 13 furnaces through the holes 29 in the walls of the latter, at which time special pipes are inserted into the holes 20 of the walls of the furnace to prevent the wood from rolling on the grate bars. Inspection of the furnace and minor repairs are made through the holes 11 {fig. one).

For the purpose of burning in the described furnace of combustible shale, in the grate elements, instead of plates 5 (figs. 3–5), similar

plates 5 with holes (figs. 6-7), and instead of the grate elements b of the box 6 (fig. b-7) with gaps for air passage.

The subject of the patent.

1. Firebox with chain grate for burning fine low-grade fuel, characterized in that the grate elements of the grate are made up of plates 5 connected with driving chains 4 (FIG. 3 -5) of the plates 5 with gaps 28 for air passage and with grate elements b, which, during their movement, the directions of the parallels 3, which run obliquely vertically in the lower and middle parts and in the upper part, are curved arcuate to the side towards the outlet of the loading bucket 7, from which fuel is directed along the plate 15 downwardly by part for burned or when it falls, part of the same

for placing on inclined area 13, for the purpose of subsequent supply of unburned fuel by gravity along it to the upright grate elements of the working grating branch, after-burning it into them and gradually bringing ash and slag along the inclined parts of the elements b to the side walls of the furnace, then take them from here to manholes 17 and 18.

2. A variation of the furnace described in paragraph 1, characterized in that, in order to burn combustible shale, they are used in the grate elements, instead of plates 5 (Fig. 3-5), like plates with 5 holes, and instead of the grate elements 6, boxes b (fig. b-7) with slots for air passage.

3. Use in the furnaces of scraper 8 described in paragraphs 1 and 2 (Fig. 1) for cleaning slag adhering to the ribs of plates b or b.

FIG.

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