1, milk powder is milk, which is used as raw material to remove almost all the water in milk by freezing or heating, and then dried to make powder, which is called milk powder. Milk powder is generally produced by heating method. Generally, the sugar content of milk powder is below 20%.
2, before spray drying, should be vacuum concentration. Remove 70-80% moisture from milk. Vacuum concentration can greatly reduce the evaporation of water during spray drying, improve the particles of milk powder and improve the preservation of milk powder. The principle of spray drying is that under the action of high pressure or high-speed centrifugal force, concentrated milk is sprayed into the drying room through an atomizer, and when it comes into contact with the blown hot air, the water evaporates instantly, so that the milk powder is dried into particles. The milk powder produced in this way has fast drying speed, good dispersibility and high degree of automation.