DE92635C - - Google Patents

Description

IMPERIAL

PATENT OFFICE. ^

The furnace according to the present invention should as far as possible complete combustion of the Achieve fuel through a controllable supply of air by means of three-part heating of the room the grate for separate air supply under, above and behind the grate. Supports this effect can be achieved by a suitably arranged loading device and by mechanical movement of the fuel distributed on the grate.

Fig .. ι is a longitudinal section in the center plane of a flat grate for fire pipes with the new Air supply device for ordinary, charging,

Fig. 2 respectively a horizontal section. Grundrifs,

Fig. 3 partly a vertical section according to I-I of Fig. I, partly a vertical section according to H-II of Fig. Ι and

Fig. 4 is a cross section of a grate bar.

Fig. 5 shows a vertical longitudinal section of a two-part, inverted roof-shaped grate, ■ the one in the middle with slag crushing rollers and for loading cradle loading is, with the new air supply device,

6 shows a basic outline,

Fig. 7 partly a vertical section according to I-I of Fig. 1, partly such a section according to H-II of Fig- ι,

Fig. 8 is a front view of the fire box and

9 shows a cross section of a grate bar of the left grate half.

In both embodiments, the grate is set up together with the fire cupboard and the fire bridge so that it can be pulled out, it therefore rests on rollers A on the two upper sides and one such C in the lower middle (FIG. 3) within the rear end piece D of the ash chamber; Running rails .E and .F on both sides of the firebox and. on the floor of the ash chamber serve as guides.

The multi-part air supply to the fire in both types is arranged by separate partitions of the ash space so that a shallow trough M, rising obliquely from the front to below the end of the grate at the fire bridge, divides the ash fall into two parts; Above the trough, under the grate, there is an air duct that becomes lower after the fire bridge, the bottom of which forms the trough and which serves for the natural draft under the grate; Below the hollow is an air duct with connections for a blower pipe at the front, beginning low on the fire tube and ending high on the fire bridge support wall, which at the same time also widens in order to supply the nozzles G located below in the fire bridge support wall either natural, heated or blown air. For the intimate and all-round mixing of this air with the combustion products behind the fire bridge, these nozzles are directed obliquely upwards and provided with conical, concentric inserts. Instead of the nozzles, nozzle-like slots can also be arranged.

The third air supply is via the grate bars, and that is the air in both Embodiments on the sides between the boiler wall and the grate surface in the larger one

Claims (1)

the front part of the length of the latter is passed over the grate from below by means of special air conduction chambers H and J. These chambers, placed on the upper trough surface, are open at the bottom towards the front and extend through a recess in the grate surface to over the fuel layer. In the embodiment of FIGS. 1 to 4, the air chambers rise so high above the grate on both sides that no fuel gets onto their upper cover, while the walls facing the fire with downwardly directed, louvre-like distribute the air in the direction of the arrows over the fire Longitudinal slots K are provided. The end walls of these air chambers H and J are shaped below the grate in the case of ashes in such a way that they allow the ashes to be drawn out comfortably. In the embodiment according to FIGS. 5 to 9, the loading takes place by means of long loading troughs, which are introduced through the front fire doors L and N arranged on the left and right and slide along the guide plates O, which are screwed on behind the fire cabinets and located close to the grate. The sheet metal walls of the chambers H and J, which distribute the air over the fuel, end behind the guide sheets 0 and are therefore protected against clogging by fuel. The guide plates O here replace the blind plates of the first version. So that the air has free, all-round and constantly changing access to the fuel and no clogging takes place, the grate can be arranged to be movable. For this purpose, in the embodiment according to FIGS. 1 to 4, the rods are mounted on thumbs R of a horizontal shaft B rotated by worm gears, while in the embodiment according to FIGS. 5 to 9 the shafts of the lifting thumbs B are inclined. In both cases, the grate bars are roof-shaped on their fire side. In the second embodiment (FIGS. 5 to 9), care is taken that the inclined position of the grate does not interfere with the movement of the grate bars, for which purpose the grate bar ribs are laterally cut off at the bottom. The fuel moves from the upper to the lower grate bars and arrives at the pinch rollers S and T driven by wheel U. ■ Patent claim: A furnace, characterized in that. the ash dropping space is divided into an upper and a lower space by inserting a trough M rising towards the rear, of which the upper space allows the primary direct air supply under the grate, the lower, covered space the air supply behind the fire bridge through openings G provided below it, while in the The free, front part of the upper space is divided on the left and right with pocket-like chambers open at the front, with a closure to the rear, by means of which air is supplied laterally past the grate surface via the fuel layer. 1 sheet of drawings.