We put the deodorization process clearly divided into two sections: one is the deodorization section, with stirring under high temperature and high vacuum steam removal free fatty acids in oil and odor components;2 it is to maintain, let deodorization oil under high temperature and high vacuum for a period of time, make the heat-sensitive pigment and peroxide decomposition thoroughly,palm oil refinery plant to ensure the product quality and stability.
Due to the oil distribution on the packing into about 10 PM thick oil film, so the oil droplets in the tower of the pressure drop was only about 200 Pa (such as the low B: and any point A1), only about 50 kPa steam, 5 mn can be directly to free fatty acid content in oil of decoloring from about 0.3% to 0.02% or less, energy-save decoloring oil smell components at the same time, this is the first stage of deodorization.The second phase we called "maintain" domain "decoloring period", at this stage to "0 111 sichuan will deodorization oil heat sensitive pigments and peroxide decomposition completely, because if oil pigment decomposition does not affect the refined oil equipment completely refining quality and stability.
1.2 working principle of the plate column
For the principle of plate column deodorization.From known, if vacuum plate tower is 250 Pa, the oil level of 50 C ". The tower plate, bottom 0: the pressure drop as A result of the existence of 50 cl "oil level will increase to 4 kPa, then compared with the liquid level A: place because" : pressure increased. According to Dalton's law of partial pressures, requires more pressure of steam and stir in the vacuum to the oil free fatty acid components and odor removal. So the steam consumption compared with the packed tower will increase obviously. And the tower of each point on the basis of different oil pressure drop, so the free fatty acid and A smelly geared components required for steam pressure are also different. And packed tower because there was no oil...