Issues with the instrument air for purging and flame detection!
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I would like to ask the experienced members of this forum: a purge air supply for the flame detection probe is installed at the heating furnace (as understood by experts)! It is not specified on the design drawings either. Could any seniors give me some advice? Isn’t having it always on a certain risk?
The instrument air used for purging and flame detection is primarily intended to keep the probe clean, preventing the accumulation of dust, oil, and other contaminants from affecting its proper operation. If it remains in the open position, there are indeed certain risks, such as increased energy consumption and potential aging of the instrument air pipeline. It is recommended to make adjustments based on actual operating conditions and the suggestions of the equipment manufacturer. At the same time, regular maintenance and inspections can be considered to ensure the safe and stable operation of the system. .
No, it’s minimal compared to the amount of hot air that enters the furnace. The reverse airflow is primarily used to protect the flame detector probe from failure due to dust accumulation, which could lead to interlocks being activated
There is no risk. What was said upstairs makes sense. Based on the flow rate of instrument air provided by the manufacturer, the amount of air required would be very large. Therefore, it is recommended to install a throttle valve, as it is better to adjust the usage amount based on the routine maintenance practices.