What is the main air flow rate for the auxiliary combustion chamber? ? ?
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I would like to ask, what is the normal main air flow rate when starting up the auxiliary combustion chamber? What are the typical opening degrees for the primary air valve and the secondary air valve?
Primary air is mainly used to supply oxygen to the fuel, while secondary air is used to carry away heat. When starting the furnace, the main air flow rate should be reduced as much as possible, and the primary air flow should also be decreased. The main purpose of this is to prevent the velocity of the primary air from being too high, so that the fuel is not blown away before it has time to burn. It’s the same principle as a lighter; when trying to light it, if the wind is too strong, it’s difficult to ignite.
During ignition, the primary air is basically not used; a small amount of leakage is sufficient; otherwise, it will be blown out and fail to ignite. As the fire is intensified, observe the color of the flames; turn on the air supply once when they darken. Finally, the maximum load is reached: the primary air is fully opened while the secondary air is fully closed.
Everything said upstairs is correct. For ours: when starting the furnace, the primary air is set at 5%, while the secondary air is turned on fully. After ignition, as the fuel amount increases, the primary air is gradually increased to full capacity, while the secondary air is reduced to prevent overheating of the furnace