DE1451464C - Device for firing, in particular ceramic ovens, with means of gas - Google Patents

Description

and the flame only arises in the combustion chamber 6 of the furnace, i.e. at a greater distance from the nozzle. Nozzle 4 with air chamber 5 therefore stay cool.

The gas is supplied to the nozzle 4 under constant pressure, namely in pulses. To this end a compressor 8 is provided in connection with a gas container 7, the speed of which is known per se Way, e.g. B. by a variable speed motor, is continuously adjustable in order to keep the gas pressure constant. Due to the high pressure, keeping the percentage constant is much easier than with the usual To achieve low pressure, since there are no sufficiently large adjustment forces available. Between the compressor 8 and the nozzle 4, an electric valve 9 is provided as a pulse regulator, which does not have a stuffing box and has only one moving part, so that it is also with the subsidized high switching frequency always remains operationally reliable. The temperature in the furnace is controlled by changing the number of dated Valve 9 generated pulses, which is usually 100 to 150 per minute. For control and maintenance the oven temperature can be controlled by conventional temperature controllers in conjunction with known temperature controllers electronic or magnetic pulse generators can be used. It can be useful as a pulse generator a magnetic amplifier controlled by an oscillation circuit can be used in such a way that it works as a switch, but it does not open and close completely. However, this is the case in practice Operation does not matter because, in contrast to the usual switch arrangements, there is no wear and tear occurs and the robustness required for the rough brickworks is given.

By the control pulses, the magnet winding 10 of the is for a correspondingly short period of time Solenoid valve 9 energized, which is applied to a sleeve 11 made of non-magnetic material, in which houses a piston 12 with an extremely small stroke. The upper conical end 13 of the piston is in retirement by a spring 14, which sits in a recess 15 of the piston, against a valve seat 16, to which the connecting line 17 to the nozzle 4 is connected. Immediately below of the valve seat 16 is in the housing 18, which encloses the parts of the valve on all sides, and in the piston 12 a through-opening 19 which remains open at all times is provided in order to achieve a uniform one around the valve seat To achieve gas distribution.

1 sheet of drawings

Claims (3)

1 2. Possibility of use for gas firing no claims: the rule that can be easily reworked can be seen as the previous one that worked with burner lances 1. Device for firing, in particular gas firing, can be improved. of ceramic ovens, by means of a gas / air 5 The invention is based on the object Mixture with pulsed gas supply, avoiding the previously required lances that characterized in that the control required large amounts of gas in exact dosage to feed the with a pressure of reduced, so that a completely automatic best 1 atm, preferably from 2 to 10 atm, drive can be obtained. This is achieved by the fact that according to the invention Room (6) arranged mixing nozzle (4,5) to control the supply of the with a pressure of Magnetic valve (9) is used with one of at least 1 atmospheres, brought up gas to a The mixing nozzle is surrounded by a magnetic coil (10) and is not arranged magnetically outside the combustion chamber see hollow cylinder (11), in which one with its a magnetic valve is used with one of one Valve surface (13) surrounded by a spring (14) against 15 magnetic coils, non-magnetic hollow lines Valve seat (16) in the closed position push cylinder, in which a valve surface of a ter piston (12) is guided, which when the spring is excited against a valve seat in the closed position ge-solenoid (10) is pulled into the open position, the depressed piston is stirred, which when the and that to excite the magnetic coil (10), a magnetic coil is pulled into the open position, and that Infinitely variable pulse generator with a minimum of 20 to excite the magnetic coil of 100 impulses per minute upstream impulse generator with a minimum frequency of 100 see is. Pulses per minute is provided. 2. Device according to claim 1, characterized in that the piston of the valve is expediently at the indicates that the piston (12) has a through opening at the free free end. Has a through opening (19) at the end. 25 In order to keep it constant, it is advisable to 3. Device according to claim 1 or 2, number-controlled compressors are provided, the reduction of which characterized in that to keep constant gel motor by an electronically controlled the gas pressure speed-controlled compressor rectifier is continuously adjustable. Ren (8) are provided, the regulating motor of which by means of short an electronically controlled rectifier with a sharp and very hot flame, like one can be regulated without a window. Compressed gas burners are so-called rocking fire gas burners, also known for liquid fuel. However, these are un- suitable, because here exactly the opposite is a soft one 35 long flame is required, which can also be easily, quickly and conveniently regulated so that a fully automatic Fire with constant temperature The invention relates to a device for holding. The gas supply therefore takes place at fire, in particular of ceramic stoves, by means of the invention not continuously and also not a gas / air mixture with pulsed gas supply 40 with low pressure as in the known drove. Rocking fire burners, but with a pressure up It is known to fire ceramic ovens, especially tunnel ovens and at precisely adjustable intervals of kilns and ring ovens, by means of low-pressure gas with at least 100 pulses / min, and with one outside. Due to the small penetration depth of the normal mixing nozzle located in the combustion chamber, in the case of the gas flame, the cross-section and thus the performance is very limited in the case of tunnel ovens. For firing at a greater distance from the burner nozzle in the ring furnace, numerous long iron pipes have to be created in the combustion chamber. The use of an "impulse (lance) in the stocking so that valve" according to the invention has the advantage of being a component that is evenly distributed enough for a uniform fire of the ceramic that there is only a single moving component that is sufficiently subject to wear and tear , namely has the piston, and lung is obtained. These long iron pipes are un- so that it can be handled precisely and without delay on those of its own, in addition they must respond to impulses given in glowing magnetic winding,
would be pulled out of the oven, what for. The drawing is an embodiment of the the operation is not entirely harmless and shows an invention
forms a constant source of danger. Finally, according to FIG. 1 a schematic representation of a one-part that the usual low gas pressures in the direction for pulsed gas firing of a Kera-known burner an exact dosage of the gas mixing furnace, make crowd quite difficult. F i g. 2 shows a vertical section through the at The invention has the purpose of eliminating the difficult to operate the device of FIG. 1 impulse valve used, to avoid the prevailing burning lances and the closing of the 60 The masonry 1 of a tunnel or ring furnace drove larger amounts of gas with exact dosing - possesses at the position provided for the firing and fully automatic firing to enable passage openings 2, which are closed after the furnace. nern to at 3 can be somewhat conically widened. Because of the fundamental difference between the two, there is a gas nozzle 4 in front of each opening 2 For oil and gas, an operation is provided for oil, which is surrounded by an air chamber 5 Henen system is not easily possible with gas, is that jacket-shaped around the nozzle 4 air in such so that an indication of the amount of oil firing concerned and under such pressure are supplied Fenden French patent 1 099 400 on a can that a corresponding directional effect is created