False alarm issue in rotary kiln flame monitoring
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The rotary kiln uses ultraviolet flame detectors to monitor the flame, but after the natural gas supply is cut off and the flame goes out, the high temperature of the material causes it to turn very red, and occasional sparks can lead to false alarms from the flame detectors, indicating that there is still a flame present. Is there any other better way to monitor whether it has stalled in this situation?
1. The principle of ultraviolet flame detection is to detect the light emission from the flame; internal objects or the vessel walls also emit light when the furnace is shut down, so it is impossible to avoid this phenomenon based on the principle itself； 2. If it is only to detect whether the engine has stopped, the status of the fuel gas valve can be taken into consideration for judgment ； People went to the fire viewing hole to take a look ； Install an internal flame monitor ； 3. If it is to determine whether the engine has stalled, restart it. It can be determined in conjunction with temperature: if it is above the ignition temperature, it is also permissible to ignite it directly without purification by feeding it directly as fuel gas.