DE369076C - Device for igniting fireplaces, in particular for steam boilers - Google Patents

Description

Device for igniting fireplaces, especially in steam boilers. In the main patent it concerns a fire lighter, in which the firing by a jet flame is ignited, the Brennerd'isie by a partly over and - partly under the same protective hood against clogging, slagging and burning is protected. It often happens that the protective cover is heated too much and therefore burns at the ends. This disadvantage can be caused in the simplest way suitable cooling of the protective hood can be prevented.

For this purpose, the protective cover is fitted with Cavities provided, through which compressed air or fresh air flows for cooling. In connection with this coolable protective hood is the type of oxygen or compressed air and Fresh air supply and the supply of fuel gas are of particular importance. According to the invention, the means required for combustion are so for Burner nozzle out that by the flow speed of the compressed air air from is unsawgt outside and fed to the burner, -so that the gas supply is soon can turn off the lighting. So the pulling effect is also @increased, which is very essential for a faster ignition of the fuel.

In the drawing is an embodiment with various types Air supply shown, namely Fig. I shows the burner lengthways cut protective hood, Fig. a the arrangement of a funnel-shaped air intake pipe and Fig. 3 shows the intake of additional air through the gas connection.

The protective hood a is provided with a cavity b and attached to the compressed air pipe c. The latter surrounds the gas pipe d in a known manner and is interrupted in the cavity of the protective hood. When the compressed air is turned on, cold air is sucked in through one or more openings as a result of the flow velocity as it emerges from the burner nozzle f into the cavity b of the protective hood a through one or more openings. This then continues to flow through the cavity b with vigorous cooling of the protective hood a and exits through the openings h and then promotes the ignition of the fuel as a result of increased air supply. The protective hood a is expediently made of cast iron.

The oxygen supply to the grate can, however, be increased if the arrangement shown in Fig. A is used. Here the fuel gas is also fed through the middle tube i to the nozzle, while the tube l feeds the oxygen-containing agent, for example compressed air. The tube l, together with the conical ring k attached to the tube l, forms an annular nozzle n. Both tubes are surrounded by a third tube in. The latter runs out into a funnel o, with which it engages with the formation of an air gap over the ring nozzle n. After the compressed air or ring nozzles exit, it is passed on in the pipe m. As a result of the flow velocity, fresh air is sucked in through the funnel o and carried along by the compressed air to the grate. In this way, the consumption of compressed air is significantly reduced.

As soon as a relatively small amount of fuel has been brought into embers the fuel gas can be turned off; because for the promotion of inflammation all that is needed is oxygen, which is the cheapest in the air. If a three-way valve r is now switched on in the compressed air line p (Fig. 3), so is made by turning off the middle fuel gas pipe from the fast-flowing, oxygen-containing agents (compressed air) through the open valve to the outside air Fresh air is sucked into the pipe p and in the breath pipe s through: the burner nozzle - directed to the fuel. This facility is particularly beneficial because none special air intake is required.

Claims (1)

PATENT CLAIMS: i. Device for igniting fireplaces, in particular for steam boilers, according to Patent 351398, characterized in that the burner protection hood (a) hollow and the outer line (c) of the fuel pipe inside of the cavity of the protective hood is interrupted, so that by the flow rate of the fuel in the cavity in the protective hood with openings (g) an air flow is generated, which cools the same and the ignition of the fuel on the grate promotes. a. Device according to claim i, characterized in that the oxygen, for example compressed air, supply line (l) together with one on the fuel gas line (i) provided conical ring (k) forms a nozzle (s), which from one to the Burner leading into a funnel (o) draining pipe (m) to form a Annular gap is surrounded. -3. Device according to claim i, characterized in that that a three-way valve (r) leading into the compressed air is switched on, when switching off the gas line by corresponding TJ: m position to the burner leading Teml of the line (p) connects with the outside air.