Rice bran oil before the production are artificial crushing, and now is not, and a special rice bran oil equipment, with professional rice bran oil equipment can produce more sophisticated rice bran oil out.
What is the rice bran oil production process to raise it?
1. Hydrated degumming rice bran oil The key to physical refining is as much as possible to remove the colloidal material in the oil, a large number of colloidal substances will not only affect the quality of products, but also under the action of high temperature coke formation of grease on the surface of the filler, the impact of equipment The normal operation. In general, hydration degumming oil must be ≤ 30mg / kg.First, the crude oil to 80-85 ¡æ, adding 0.3% of the amount of oil, the concentration of 85% phosphoric acid, rapid mixing 30min. And then add the temperature of 90-95 ¡æ, 8% of the amount of oil, 5% concentration of alum solution slowly stirring 15min after standing for 2h, release the oil feet.
2. Washed first degreased oil heated to 75-78 ¡æ, adding the temperature of 90-95 ¡æ, 8% of the amount of oil, 5% concentration of alum solution slowly stirring 15min after standing for 2h, release the oil feet. And then the oil temperature rose to 75-78 ¡æ, adding the temperature of 90-95 ¡æ, 8% of the amount of water tap water slowly stirring 15min after standing for 2h, release the oil feet spare.
3. Dry and dry degumming before the water must be degumming oil moisture down to 0.5% or less. The hydration degumming oil drying is carried out in a continuous packing dewatering dehydrator, the drying vacuum is -0.09Mpa, and the oil inlet temperature is 105-110 ¡æ.
4. Dry degumming drying oil heated to 85 ¡æ or so, by adding a concentration of 85% of the concentration of edible phosphoric acid, adding 0.1% of the oil weight, the knife mixer quickly mixed mixed reaction, into the blade filter The The use of decolorized waste clay filter to remove residual phospholipids and metal ions and other impurities to get dry degumming oil. In general, the dry degummed oil containing phosphorus ≤ 10mg/kg.
5. Decolorization dry degumming oil 70% heated to 110 ¡æ, into the decolorization tower decolorization. 30% of the oil into the clay mixture and the addition of clay mixed with the slurry, the vacuum into the decolorization tower decolorization. Decolorization tower for the double structure, steam mixing. Decolorization tower vacuum degree of -0.09Mpa, oil decolorization in the decolorization tower for 30min, the amount of clay to 2% is appropriate. If the decolorization effect is not good, you can add a little activated carbon with the use.
6. Filter blade filter operating pressure 0.2-0.3Mpa, decolorization of the oil by the bag filter into the vacuum bleaching oil temporary storage tank. In general, decolorizing oil containing phosphorus ≤ 5mg / kg, color Y35, R6 or so. If the amount of phosphorus exceeded the need to identify the reasons before the next process.
7. Deacid decolorization oil by oil – oil heat exchanger, the last heater heated to 250-260 ¡æ into the deacidification tower deacidification. Deacidification tower for the structural packing tower, the oil in the filler surface from the top under the action of gravity down, and from the bottom of the saturated steam into the full contact to achieve the purpose of stripping deacidification. The flow time of the oil in the tower is 5min, the direct steam consumption is 2% of the oil weight and the vacuum absolute pressure is ≤200Pa. The deacidification oil flows into the demolished tank under gravity.
8. Delayed decolorization in high temperature, high vacuum conditions, deacidification of chlorophyll, carotenoids and other heat-sensitive pigment is broken down. Delayed decolorization tank for the horizontal tank, the internal divided into four cells, the oil flow in the order of the internal. Delayed decolorization temperature of 240-245 ¡æ, vacuum absolute pressure ≤ 200Pa, time 60min or so. The oil overflows to the deodorization tower under gravity.
9. Deodorization deodorization tower for the structural packing tower. The oil in the filler surface from the top under the action of gravity down, and from the bottom of the saturated steam into the full contact with the purpose of stripping deodorization. Oil in the tower flow time is about 15-20min, deodorization temperature ≥ 230 ¡æ, direct steam consumption of about 1% of oil, vacuum absolute pressure ≤ 200Pa. The deodorized oil withdrawn from the bottom of the column is cooled to below 40°C by means of an oil-oil heat exchanger. In general, deodorant oleic acid value ≤ 0.2mgKOH/g, color Y20, R2 or so.
The deacidified and deodorized mixed fatty acids are trapped by the structured packing column and then flowed to the fatty acid recycle tank where the mixed fatty acids are cooled to 60-70 °C. The cooled mixed fatty acids are pumped into the capture tower top dispenser by a fatty acid circulating pump. The fatty acid flows from top to bottom on the surface of the filler, and exchanges heat with the high temperature mixed high temperature mixed fatty acid vapor from bottom to top, so that the mixed fatty acid vapor becomes liquid and is captured. In general, the mixed fatty acid acid value is between 150 and 190 mgKOH/g.
10. Dewaxing deodorant oil by the plate heat exchanger and frozen heat exchanger, the oil temperature dropped to 15 ¡æ after the pump into the stainless steel cans, under the action of mixing, the use of coil circulation of the liquid to slow down to 8¡æ Crystal. Crystallization time of about 3h. The crystallization of oil into the crystal cans, constant temperature 8 ¡æ under the conditions of crystal 3h, 0.6Mpa air pressure in the filter, was dewaxing oil.
11. Degreased filtered dewaxed oil pumped into the stainless steel degreasing tank, with a scraper device under the slow stirring effect, the use of jacket frozen circulation slowly cooled to 3¡æ. Constant temperature 3 ¡æ under the conditions of crystal 6h, 0.6Mpa air pressure in the skimmed rice bran oil.
All in all, the above is the use of rice bran oil equipment production process of rice bran oil.