1, the temperature
Stripping deodorization, the operating temperature of high and low, directly affect the duration of the consumption of steam and deodorization.In certain cases, vacuum temperature increased, the free fatty acids in the oil and the vapor pressure of odor components is subsequently heighten.palm oil millTemperatures also has a limit, however, because of the high temperature can cause oil decomposition, aggregation, and isomerization, influence the stability of the products, nutritional value and appearance, and increased oil consumption.Therefore, in the industrial production, general control distillation temperature at 245 ~ 255 ℃.
2, operating pressure,air product
Fatty acids and stink component has a corresponding boiling point under certain pressure, and decreased with the loss of the operating pressure.Operating pressure to finish stripping deodorization time also has the important influence, in other conditions under the condition of same pressure is lower, need time is shorter.Distillation tower of vacuum degree was associated with fat hydrolysis, if equipment vacuum degree is high, can effectively prevent oil hydrolysis distillation loss caused by, and to ensure low acid value oil products.General production for 300-400 pa, that is, 2 -- 3 MMHG residual pressure.
3, on steam rate with timeRice bran oil dewaxing
In the process of stripping deodorization, evaporation efficiency changes according to the ventilation with the rate of water vapor.On steam rate increased, the evaporation efficiency is also increased.But on steam rate must be kept below the limits of oil began to form the splash phenomenon.Stripping deodorization operation, oil and steam contact time directly affects the evaporation efficiency.Therefore, to make free fatty acids and odor components reduced to the required standard, you need to have some time on steam.But at the same time should take into account the deodorization process oil grease...