The common faults and solutions of laboratory small spray dryers are as follows:
Sticking wall phenomenon: the feed amount is too large, resulting in the water in the material can not be fully evaporated;Before the start of spraying, the drying chamber and the drying bottle are not heated sufficiently, resulting in the occurrence of sticking to the wallThe added feed liquid is unstable, such as materials with high sugar, high viscosity or unstable molecular morphology. The solution is to appropriately reduce the amount of feed, increase the inlet and outlet temperature of the hot air, start the spray, the flow rate should be small, gradually increase the flow rate, and adjust until the appropriate time.
High moisture content: The exhaust air temperature is too low. The solution is to appropriately reduce the amount of feed and increase the exhaust air temperature.
The powder is too fine, the solids content is too low, or the feed amount is too small: the solution is to increase the solids content of the feed liquid, increase the feed volume, and increase the inlet air temperature.
The low speed of the sprinkler head is faulty: the solution is to check the internal parts of the sprinkler.
Low evaporation: The amount of air throughout the system is reduced;The inlet temperature of the hot air is on the low side;There is air leakage in the equipment, and cold air enters the drying room. The solution is to check the air filter, and the filter screen will be replaced according to the situation;Sampling and testing of the feed liquid to filter out the impurities in the feed liquid;Conduct regular and comprehensive cleaning of the equipment to remove impurities.
The above content is for reference only, and it is recommended to consult professionals in related fields for more comprehensive and accurate information.