DE7135564U - Burners for heat treatment furnaces - Google Patents

Description

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Esaan, August 27, 1971 N 4468 / W Vo / Op

Koppers-Wistra-Ofenbau limited liability company,

Düsseldorf-Hesrdt, Vieaenatraße 154

Burners for heat treatment furnaces

The innovation concerns a burner for heat treatment furnaces with a combustion chamber, from which the flue gases flow a tapered one opening into the furnace chamber, with a central air supply— chamber which opens into the combustion chamber via outlet openings arranged essentially perpendicular to the burner axis, and one the air supply chamber surrounding the gas supply chamber, which essentially Opens into the combustion chamber parallel to the air outlet openings.

The innovation is based on the task of the burner above described design with a Flammenüberwachujigeeinrichtung to provided, whereby care should be taken that this flame monitoring device works reliably and does not monitor is exposed to heat and the harmful effects of smoke gases.

In order to solve this problem, it is proposed, according to the invention, that an optical flame sensor is arranged on the end of the air supply chamber facing away from the combustion chamber, onto which an optical flame sensor passes through a bore in the plate delimiting the air supply chamber to the combustion chamber

7131564 (2/17/72

HK

N 4460 / W - 2 - 27.0.1971

Flame radiation from the combustion chamber, but not from the auiü hits -.

Due to the proposed arrangement of the optical flame sensor at the end of the Luftaufuhrkaramer it is guaranteed that the flames « sensor cannot come into contact with hot smoke gases. This eliminates the risk of overheating and the possible Precipitation of condensate from the flue gases. There are none that absorb radiation between the sensor and the combustion chamber Media. Furthermore, impurities from the furnace ruff can practically not penetrate into the air supply chamber Would tHrerrriies eof ort due to the strong combustion buf t electricity be rinsed out again. Finally, on the optical flame scanner no smoke gases escape either, so that a simple holding device can be used to attach it, which allows easy dismantling of the flame sensor.

According to a further suggestion of the innovation, it is provided that the optical flame sensor has a small amount of air that allows air to escape Distance from the bore provided in the wall of the air supply chamber is arranged. This achieves that constantly a small amount of combustion air escapes, the the optical flame scanner cools and cleans.

The innovation is illustrated in the drawing, for example. The burner consists of a two-part burner block 1, whose

N 4468 / W August 27, 1971

both parts or their housing are connected to one another by splashing 2. With 3 the combustion chamber is referred to, to the

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β-divided furnace space tapers, adjoins.

The supply of combustion air takes place through the chamber 5 »die clip with a connection 6 is provided. The Luftzufuhx'kexamer opens into the combustion chamber through outlet openings 8 which are arranged perpendicular to the burner axis 7 and in the place of which an annular slot can also be provided. In the direction of the burner axis 7, the air supply can to the combustion chamber through a « Plate 9 limited

Gas is supplied to the combustion chamber through a chamber 10 which surrounds the air supply can r ring-shaped and has a connecting piece 11 and a gas outlet slot 12.

According to the innovation, an optical flame sensor 13 is provided at the end of the air supply chamber facing away from the combustion chamber. This is located at a small distance from a hole 14 in the Wall 15 »so that there is always a small amount of combustion air, which - as already mentioned - serves to cool and clean the optical plasma sensor and can exit through the gap 16. One further bore 17 is provided in the plate 9 so that flame radiation from the combustion chamber, but not through the exit point 4 from the furnace chamber along the path 18 shown in dashed lines, can reach the optical flame sensor.

713S56417.2.72

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As can be clearly seen from the drawing, the optical surface sensor is not exposed to heat or contact Del the proposed Anoranun ^ WdWuo hli

Finally, a strut that is connected to the combustion chamber 3 is designated by 19, on which one does not ignition device shown can be attached.

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713SS6417.2.72

Claims (2)

Essen, August 27, 1971 N 4468 / W Vo / Op 5 ch υ t ζ a ε s "D r ν ο he 3 runners for heat treatment furnaces with a combustion chamber the smoke gas through a tapered opening in the oven kick * mi "£ a central air supply kassser that over outlet openings iii, which are arranged essentially perpendicular to the burner axis, open into the combustion chamber, and one the Air supply chamber bypassing the gas supply chamber, which is essentially parallel to the air outlet openings in the combustion chamber 3ünö? T, characterized in that on that of the combustion chamber (3) applied end of the air supply chamber (5) an optical Flamnaenruhler (13) is arranged on the through a Bore (17) in which the air supply chamber to the combustion chamber delimits Plate (9) plasma radiation from the combustion chamber, but does not affect the furnace chamber. 2. Burner according to claim 1, characterized in that the optical flame sensor (13) at a small distance from that in the wall (15) of the air supply chamber, allowing air to escape (5) provided bore (14) is arranged. 713558417.2.72