DE365807C - Firing for steam ovens with pre-heating of the combustion air - Google Patents

Description

Firing for steam ovens with preheating of the combustion air. the Invention 'relates to a furnace for steam ovens, with - # velchen the combustion air, namely, both the lower air and the upper air, is preheated. The quirk of the invention lies in the fact that the boiler room is surrounded by a built-in fire bridge a lower and an upper heating chamber is divided, both of which are in Are connected, with a walled in the fire bridge heating duct on the one hand through a the duct also located in the masonry with the outside air, on the other hand through another walled-in channel with the upper heating chamber communicates. By heating pipes that lie in these heating ducts and their Heating ends open into the lower heating chamber, the one flowing through these channels becomes Air is heated up and exits through a nozzle into the upper heating chamber, so that good afterburning is achieved here.

The invention is illustrated in the drawing in an exemplary embodiment, namely Fig. i is a front view of the new oven firing, partially in Cross-section along the line A-A of Fig. 3, Fig. 2, a partial longitudinal step : the line E-E of Fig. i, Fig. 3 a partial longitudinal section along the line D-D Fig. i, Fig.4 a partial longitudinal section along the line F-F of Fig. i, Fig.5 a horizontal section, partly according to the line B-B, partly according to the line C-C of the Fig.i.

The ash chamber i located below the grate 6, through the ash chamber door 22 is accessible, stands through a channel 2 with a channel lying in the masonry 3 in connection, which at 5 by a control flap with the outside air in connection stands.

The combustion chamber above the grate 6 is through a fire bridge 7 'into a lower heating chamber; and divided into an upper heating chamber io. By lateral Passage channels g can pass the heating gases and flames after they enter the lower Have heated the lower heating tube row 8 opening into the heating chamber, after the upper heating chamber io to get here to heat the upper row of heating pipes 1i.

.In the lower heating chamber 7, however, heating pipes 4 also open out, which lead to the channel 3 (Fig.2), so that therefore through the pipes, 4 through the air supply duct 3 flowing and led to the ash chamber i under air is heated and reaches the furnace through the grate at a correspondingly high temperature.

The mentioned fire bridge 7 'contains a walled-in heating channel 14, which on the one hand through a channel 16 via a control valve 17 (Fig.3) with the Outside air is in connection, but on the other hand by an equally walled in Channel 13 leads to a nozzle 12, which in the upper. Boiler room opens. In the heating duct 14 and in the duct 16 there are now further heating pipes 15, the ends of the heating pipes likewise extend into the lower heating chamber 7, so that -therefore also: this Heating pipes 15 are strongly heated urd. Therefore, in turn, the channels 16 and 14 strongly heat. Thus, through the control flap 17, channel 16, channel 14, channel 13 and nozzle 12 in the upper heating chamber io also entering upper air; strongly heated, with the result that within the upper heating chamber io a complete and smokeless combustion takes place. By the way, of course, there is also the fire bridge 7 'itself is highly heated, so that the Heating duct 14 and the air flowing through it from a strong heating subject.

From the upper heating chamber io the heating gases go through a constricted one Opening 18 after the channel ig and heat the hot water tank located in the same 2o and finally reach the chimney via a duct 21.

The described design of the furnace has not only to this extent compared to the known firing systems of this type: the advantage that both the as well as the upper air is heated: but at the same time arises from the installation the fire bridge 7 'the further advantage that the heating gases rising from the grate be forced., both the whole lower row .der heating pipes 8 and the whole coat the upper row of the heating pipes i evenly, so that therefore all the heating pipes be heated evenly.

Claims (3)

PATENT CLAIMS: i. Firing for steam ovens with preheating of the combustion air, characterized in that the preheating duct (14) divides the heating space from the grate (6) into a lower heating chamber (7) and an upper (io). 2. Firing according to claim i, characterized in that in the masonry installed preheating ducts (13, 14, 16) for the combustion air heating pipes (15) are, . whose heating ends are in the heating chamber (;). 3. Firing according to claim i and a, characterized in that the preheating duct (13) for the combustion air by means of a nozzle (12) directly with the connecting channel (9) the lower with the upper The heating chamber opens into the latter.