The high temperature bulk powder cooling system cools bulk solids with temperature up to 1,000 °C. For these very high temperatures, Bulkflow developed a system using hori-zontal water-cooled tubes as the heat exchange surface. Bulk powders 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.
The tubes 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 a welded connections outside of the prod-uct 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.
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 for lower temperature.
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