Rotary preheater main fire alarm (hot spot detection), the gap adjustment, frequency control, oil system, rotor stall warning system, blowing and cleaning systems.
Key issues affecting the performance of Rotary air preheater are: leakage, corrosion and fouling. At the time of design of tubular air preheater and air flow rate and pipe size should be reasonable selection, or along the flow direction installing vibration-proof baffle to prevent causing cavity resonance. Vibration-proof baffle eliminate noise effects. Rotary air preheater air leakage is a key issue, from the design, manufacture, installation and operation of measures, so that its movement under thermal State keep a reasonable seal gap between components. When burning high-sulfur fuel, it tube-type and Rotary preheater are susceptible to corrosion and fouling. Prevention measures include: installed at the air inlet air heaters or hot air recirculation; by low oxygen combustion or burning additives in order to reduce the amount of SO2 in the flue gases generated; soot on a regular basis, to keep heated surfaces clean; heating surface using corrosion-resistant materials.