The high temperature model cools bulk solids with temperatures up to 1,832[degrees]F (1,000[degrees]C). For these very high temperatures, the company developed a system using horizontal water-cooled tubes as the heat exchange surface. Bulk powder flows via gravity over the cooling tubes while indirectly cooled. The geometry of the tube is perfectly uniform with even temperatures throughout the tube wall to avoid hot spots and high local stresses.
Several industries process very high temperature bulk solids. This equipment features tubes that are arranged in a serpentine design connected to manifolds at the top and bottom of each section. The tubes penetrate the front and back wall of the exchanger, with all welded connections outside of the product flow. The tubes are not welded to the front and back wall to allow full movement. A product seal where the tube penetrates the front and back wall prevents product leakage. The front and back walls are typically refractory lines on the inside (product side) to keep the temperature of the walls low, minimizing thermal expansion.
The technology combines zero emissions, lower energy consumption and lower capital costs with exceptional results, according to the company. Benefits are said to include a gentle, improved product flow to prevent product attrition, prevention of potential caking in storage and slower degradation and speed time to packaging. Safe and compact, the system easily integrates on line to existing equipment, according to the manufacturer.
For large capacities, the heat exchanger can be of modular construction with multiple banks mounted directly in series to achieve the full thermal duty. A combination unit with plate design is also optional.
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|Title Annotation:||Case Studies|
|Date:||Sep 22, 2006|
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