Two fans share the same pipeline
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For the exhaust gases generated by the two units, the design concept is to use part of them as secondary air while sending the rest to the exhaust gas treatment unit. The air volume delivered by the two fans differs significantly; is such a design acceptable? In other words, two fans draw air from the same pipeline. What are the consequences of doing this? Will a fan with a high airflow rate draw away all the air, causing the other fan, whose airflow rate is below the minimum value, to experience surge?
In principle, such a connection is not allowed; connecting two fans with different air volumes through a single pipeline may cause the fan with the lower air volume to reverse direction of operation, and even lead to high temperatures. In severe cases, this can affect the service life of the bearings