DE451762C - Ground firing with supply of combustion air from the rear wall of the stove - Google Patents

Description

Ground firing with combustion air supplied from the rear wall of the stove. Grude furnaces with sieve firing and those with simple firing horizontally penetrating the fuel. perforated tubes or curved upwards Air supply bodies which direct the air through the whole of the fuel are known. These furnaces have the disadvantage that they burn unevenly, there, in the double firing, the main soil layer is its auxiliary soil layer, and with the simple one the inner to the air; canal layer their upper layer, the surface the furnace, first set fire to the places that make them thinner as a result and looser storage can penetrate. The complete firing of this layers that have turned into embers in some places therefore take place slowly, so that often with single firing the inner layer and with double firing the main gravel layer has already been burned and requires renewal of the fuel, while their overlying layers have just become very hot.

The invention is based on the knowledge that uniform combustion the furnaces, especially the auxiliary soil layer with sieve and the surface layer in simple furnaces,: can be achieved if the same to set it on fire, besides the 'warmth from below, another uniform warmth is fed from above. This is achieved in that the combustion air for the furnace is fed through its rear wall instead of through the front wall of the furnace and that that of the main rudimentary layer is in the double and of the inner one Layer of heating gases rising from behind to from and to with simple firing, again - back over the auxiliary gravel layer or the surface of the respective furnace to the rear wall of the stove and on to the smoke exhaust pipe.

Fig. I shows a base furnace with the device in view and Fig. 2 shows the furnace according to section A, -B of Fig. I in a side view.

Fig.3 shows a box-like connection for supplying the combustion air from the rear wall of the stove to a pull-out fire box.

The by means of side weights; a and - on the handle b of the fire box c raisable and lowerable fenerungseinrichtung the base furnace d is with the fuel penetrating and adjacent perforated roof-shaped fuel carriers e equipped, under which the air ducts f form. On the back of the stove a conventional slide adjustable by means of a handle g is arranged through which the combustion air drawn in through the openings i is regulated.

Before it pulls through the openings k of the fire box, the air passes through a connecting duct that surrounds these air openings and their space between the rear wall of the stove and the rear wall of the fire box, consisting of two mutually sliding duct halves 1 and m The lower ZVands of these two channel halves are provided with bends n and o which are aligned in the same direction and close to one another, which move apart when the fire box is lowered and close together again when the box is lifted, while the sloping side walls of the channel half are positioned between the elongated, aligned sloping side walls p of the channel half l on and off.

The through the duct connection and through the air holes k in the fire box Incoming combustion air flows through a ZVarid q that is divided off and above covered room r, where it heats up on a layer of embers that grows from the fuel-receiving space through one left free by the wall q below Gap in, the space. .inserts. Then comes the preheated combustion air through air holes s in the wall q into the air ducts f, which they connect through openings t leaves with the heating gases, as indicated by the arrows in Fig: 2, after flowing through one also divided and warmed by a layer of embers, but open at the top Raurn! Es, do over the entire surface of the fuel and back to: to pull the rear wall of the stove to the smoke outlet.

In the case of grude ovens with double firing, the device can also be used in be arranged in a corresponding manner.

In the case of pit stoves with extractable firing equipment, the connection for the air supply between the air inlet openings i on the rear wall of the furnace and the air openings k on the rear wall of the fire box can be formed by two duct halves x and y (Fig. 3) that surround the openings and can be pushed into one another made of truncated pyramids.

Claims (2)

PATENT CLAIMS: i. Ground firing with supply of combustion air from the rear wall of the furnace, characterized in that with simple firing with the fuel penetrating air channels this from the combustion air first flowed through from the back to the front, whereupon the developed heating gases from the front smear the surface of the embers to the rear, while with grud firing with sieve firing the air first brushed the main fire from back to front, whereupon the The heating gases flow from the front to the back via the screen furnace. 2. Basic firing after Claim i, characterized in that when the fire box can be raised and lowered Connection between the air inlet openings in the rear wall of the furnace and of the fire box through two air ducts when lifting. of the fire box Trapezoidal duct halves sliding against one another by means of bends (n, o) (1 utid in) is established, while with pull-out fire boxes the connection is effected by means of two pyramid-shaped channel halves (x and y).