Screw Cooler / Water Cooled Screw Conveyor
Keywords:
Material Cooling System
quality Cooler for CFBC boiler
quality Screw Cooler for CFB Boilers
Classification:
The Screw Cooler for CFB Boilers is an essential and highly efficient heat recovery system designed to manage high-temperature ash from circulating fluidized bed (CFB) boilers. This robust equipment is specifically engineered to handle boiler ash with an initial discharge temperature as high as 950°C, effectively cooling it down to a safe handling temperature of 200°C or lower. This critical temperature reduction process prepares the ash for subsequent pneumatic or mechanical transportation to ash storage silos, ensuring safe and reliable downstream handling.
This specialized Screw Cooler for CFB Boilers operates on a sophisticated principle that combines material conveyance with active heat exchange. It utilizes a rotating helical screw blade, coiled around a central shaft, which moves the ash through a jacketed U-trough, typically set at a slight incline. As the hot ash is transported, heat is efficiently transferred away from the material. The volumetric transfer rate of ash is directly proportional to the rotating speed of the shaft, which is precisely controlled through a Variable Frequency Drive (VFD) for optimal process control. To accommodate different operational needs and ash rates, the Screw Cooler for CFB Boilers is available in two distinct internal designs. The Solid Flight Design provides effective cooling through the jacketed surfaces of the trough and the shaft itself. For applications demanding maximum cooling efficiency, the Hollow Flight Design is available, where the hollow flights allow the cooling medium to flow through them, significantly increasing the total heat transfer surface area and enhancing the cooling capacity. This versatile and durable system is integral to the safe and efficient operation of modern CFB boiler plants, providing a closed-loop, controlled method for ash management and heat recovery.
Keywords: Ash cooler/Slag cooler/Drum cooler/Rotary drum cooler/Bed ash cooler/Rotary bed ash cooler/Water cooled ash cooler/CFBC boiler ash cooler/ Screw cooler/Cooling screw/Water cooled screw
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