DE90323C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 24: Combustion systems.

Patented in the German Empire on June 28, 1896.

It is known that in order to achieve complete combustion, especially in the case of steam boilers, one must and prevent the formation of smoke, steam or air or anything else then introduces oxygen-containing gas into the combustion chamber above the grate when fresh Firing material has been introduced, and that this injection after a short time This point in time must be maintained in order to achieve the desired success.

The disadvantage of such devices is that the tip of the injection tube occurs high heat burns and that, in the case of the water used, solid constituents in solution contains the slots or perforations through which the injection takes place fill with a crust and thus accelerate the wear and tear.

The present invention has the purpose of producing a nozzle which is in. The high Firebox heat remains undamaged, and consists essentially in the arrangement of a Water pocket below the nozzle or injection opening and such a line of water inflow , that even when not in use there is always a little water in the water bag and a weak one Injection openings keeping clean vapor takes place.

Fig. Ι is a side view of the. new nozzle, Fig. 2 is a vertical section,

Fig. 3 is a basic plan seen from above,

4 shows the front view of a furnace in connection with the innovation,

Fig. 5 shows the entire device for supplying steam or gas and

FIG. 6 shows an enlarged section along line 6-6 in FIG. 5.

A is the pipe through which steam or compressed air or a mixture of both is fed to a nozzle or opening which is located inside the furnace above the grate, e.g. B. over the fire door (Fig. 6).

The injection piece B is attached over the end of the pipe A and in the interior of the combustion chamber, preferably close to the inner front wall thereof; this injection piece is connected below with the water bag B ¹ and has a series of openings b above the water level through which steam, air or a gas mixture is blown into the furnace.

The water pocket B ¹ is of sufficient depth and diameter to contain a certain amount of water, which is measured according to the size of the furnace and the heat.

A ^{water tank C 2} (FIG. 5) is connected to the pipe A by a pipe G ^{, and a shut-off valve C 1 is} arranged in the pipe string, which closes automatically when there is back pressure from the pipe A.

An uninterrupted, slow stream of water flowing through A to B ^{1 is maintained in pipe C.} A valve C ^{3 is} provided for regulation.

The furnace D is provided with some kind of device (e.g. an electrical) /

through which, when the fire door is opened, a stream of oxygen-containing gas is admitted into pipe A and is maintained for a while after the door has been closed.

In the circuit formed by the tubes AA ¹ two isolated points £ ² b ' ^{1 are} provided. A spring b ^% is attached to the front plate of the furnace in such a way that when the fire door is opened D ¹ contact is formed and the current between the two insulations ² b ^{2 is} closed. A valve G is arranged in this pipe string and next to it an electric motor E. A disk e ¹ with an insulated point e ' ² and also an insulated thumb e ^{3 is} wedged on the shaft e of this. An insulated contact spring e ⁴ lies on the circumference of the disk e ¹ and closes the line, except when the insulated point e ^{2 is} touched. A rotatably arranged lever c is moved by the thumb e ³ and closes the valve G by means of pressure on the valve rod c ¹ , while the valve opens again when the thumb e ^{3 is} rotated further under the action of a spring attached ^{behind the stuffing box c 2.}

The electric motor is operated by a battery F or otherwise and a variable resistor H is switched on to regulate the speed.

A constant line f goes from one pole of the battery F to the electric motor. The other pole of the battery is connected by the wire jf ¹ to the circuit of the tubes AA ¹ , namely outside the points between the insulators Z » ² b ' ² .

A branch / ^{2 of} the wire f ^l goes to the insulated contact spring e ⁴ , and the part of the tube between the insulators δ ² έ ² is connected to the electric motor by the wire / ³ .

The figure shows the device in the idle state. The contact spring e ⁴ rests on the isolated point e ² and the contact b ³ is open.

When the fire door is now opened, the current is closed and goes from the battery F through f into the motor and through the wire f ³ into the insulated part of the pipe A and from here to the furnace, from there through the pipe part outside the insulation and further back through the wire / ¹ to the battery.

The motor E will therefore rotate and thereby the contact spring e ⁴ will remove the disk e ¹ from the isolated point e ² . As soon as this happens, a new connection is created, and when door D ¹ is closed again after firing and the mentioned current flow is interrupted at b ^B , the second current flow continues for the time being, namely through shaft e into disk e ¹ , the contact e ⁴ and the branch connection / ² and from there back to the battery.

The motor continues until the isolated point ² also interrupts this current, whereupon a standstill occurs.

At this moment the thumb is also in the position shown in which it closes valve G completely.

The rotation of the motor causes the valve G to open at the same time as that of the door X) ¹ , whereby a stream of steam or air is blown into the furnace.

After the fire, the valve remains open until the motor E has made a full turn and the current is also interrupted here ^{by the contact spring e 4} striking the isolated point e ^2.

The resulting vapor or gas flow is as follows:

After opening the fire door Z) ¹ , a stream of steam or air hits the furnace material through the openings b over the entire width of the grate; then the grate is reloaded and the fire door is closed. With this, the injection of steam or air through the pipe A ^{1 is also} soon ended.

During the injection period, the injector B is kept cooler than the firebox temperature by the steady flow of steam or gas. However, as soon as the steam or gas flow ceases, under normal circumstances the injector would be heated up and melted or cracked or otherwise worn away. But as soon as the injection stops in the present case, water flows from the container through the pipe C and pipe A into the water sack J5 ¹ , comes to a boil there and thereby keeps the entire part of the injection device located in the combustion chamber at a temperature at which the aforementioned destructive effect does not occur.

The water supply through the pipe C will always cease when the pressure of the steam in the pipe A at the point of junction with the pipe C is sufficient to press the drain valve C ¹ onto its seat. Therefore, in the pipe A, the steam injections and the pressure and the slow water inflow alternate with each other.

The condensation of steam in the pipe A supplies water to the water bag B ¹ for the duration of the injection.

The water bag B ¹ is best made of wrought iron.

Claims (1)

Patent claims: i. An injection device for furnaces, characterized in that it has the injection openings for steam or air, a water-fed container under the influence of heat is connected, which, when the device is not in use, develops sufficient steam escaping through the openings to keep them cool and clean.
A special embodiment of the device according to claim 1, in which the container is formed as a water bag located in the combustion chamber and lying below the injection openings, whereby advantageously during the steam or air injection the water supply is automatically interrupted when the fire door is opened. For this purpose ι sheet of drawings.