LPD Series Multi-stage Centrifugal Spray Dryer

Usage and Features
This equipment series is used when single-drying equipment fails to meet product quality standards. Therefore, by串联 combining two or more drying methods, the desired product quality can be achieved. This series is widely employed in the food industry, such as for coconut powder, coffee, milk powder, and vegetable fat emulsions, etc.

Process flowchart

The closed-loop centrifugal spray dryer transfers most of its heat energy to the heat exchange unit of the closed air/steam circulation loop for the drying air. The cooled flue gas (waste gas) leaves the heat exchanger and is released into the atmosphere through the exhaust fan at temperatures ranging from 140-180°C via the exhaust stack.
In addition, the thermal energy of the BLPG closed-loop centrifugal spray dryer needs to be transferred by air-air heat exchangers to dry the material. The dried air is contained within a closed-loop system, allowing for significant heat recovery benefits, thus making the process more energy-efficient than other systems within its range. Furthermore, since the primary energy source is separate and not in direct contact with the material, the risk of sparks or heat particles generated in the combustion chamber is eliminated, making it safe for direct transport to locations with potential high-level explosives or combustible materials.
When air passes through the drum, its evaporated water is extracted from the material. The air/steam is then separated from the dried material in the combined cyclone/filter unit and returned to the heat exchanger for reheating, where its temperature is raised from 120°C to approximately 400-450°C.