Study On Production Parameters Of Milk Powder By Low-temperature Vacuum Spray Drying

Milk powder as the modern life necessary nourishment,its processing methods are basically based spray drying process.The temperature of the traditional spray drying is so high that the quality of milk powder has been affected,but low temperature spray drying technology can reduce this adverse effects.This article is studied through the three formulations milk powder spray drying process,they are raw milk powder,fat milk powder,high protein milk powder,understand the difference between its spray drying process.Provide reference for people to reasonable choose milk powder,provide theoretical support for industrial production.1?Raw milk low-temperature vacuum spray drying process conditionsOptimal conditions of raw milk to low-temperature vacuum concentrated: the degree of vacuum of-0.06 MPa,concentrated time of 40 min,concentrate temperature of 55?.Select ?-cyclodextrin best drying aids for the spray drying.Univariate of raw milk by a spray drying factors were optimized through response surface was analyzed to obtain the best raw milk spray-drying process are: inlet air temperature 91?,feed rate 6mL / min,the amount of drying aids 4.90%,under these conditions the raw milk yield up to 33.87%.2?Fat milk low-temperature vacuum spray drying process conditionsThrough the single factor for peanut walnut milk powder spray drying factors were optimized,after the response surface for analysis,the best peanut walnut milk powder spray-drying process is : inlet air temperature 83?,feed rate 6.5mL/min,the amount of drying aids 4.99%,under this condition peanut walnut milk yield up to29.59%.3?High protein milk low-temperature vacuum spray drying process conditionsThrough the single factor for casein powder spray drying factors were optimized,after the response surface for analysis,the best casein powder spray-drying process is:the concentration of casein emulsion is 20%,inlet air temperature 81?,feed rate6mL/min,the amount of drying aids 3.89%,under this condition casein powder yield up to 26.90%.4?Three kinds of milk powder low-temperature vacuum spray drying finished nature detectionThe highest yield of low-temperature vacuum drying spray is raw milk powder,followed by fat milk powder.Lowest spray drying yield is high protein milk powder.Three kinds of milk powder met acceptable quality standards.It can clearly be seen,low-temperature vacuum drying spray applied to the actual production is feasible.