Main features: physical refining process, no need to remove acid by alkali refining, to avoid the loss of neutral oil, greatly reducing the cost of production.
Process: hair oil pump oil refining degumming, neutralization operation. When the oil and soap were separated, rapidly sinking, stop stirring, standing, and then suck the upper oil to water irrigation. Saponin from the bottom emptying pipe to gleditschia barrels, when oil saponin is large, stop put soap soap, soap by pumping irrigation. The remaining oil in the oil tank is mixed with the next irrigation. To adsorption decolorization tank oil in the tank after washing oil transfer. The oil is pumped into the gas distributor through a constant flow pump, and the flow rate of the oil is adjusted through the flowmeter. In the gas distributor, the oil is sprayed through a plurality of nozzles on the feed pipe, and the high vacuum of the absolute pressure of about 3mmHg is maintained in the air separator to release a small amount of air into the oil. Oil from condensate gas is pumped into the reactor, the oil - oil exchanger, and the heat exchange from deodorizer out of the oil is heated to 180 DEG C, at least. From the oil, oil heat exchanger, heat conduction oil flows into the heater is heated to 260 DEG C, the heat conducting oil is heated to 290 DEG C in heat-conducting oil furnace, recycling in the whole process. The hot oil to be removed from the heat transfer oil heater into the combined deodorization tower, in the packing section with direct steam to put forward fatty acids and other relatively volatile volatile substances, and then into the plate section deodorization and thermal decolorization. In the processing of low acid or oleic acid for finished products does not require high oil price, may not need to through the packing section, direct plate deodorization and thermal decoloration. Deacidification deodorization after oil removal from the discharge column combined pump into the heat exchanger and to be deodorized oil exchange, then enter cooler by water cooling, cooling oil temperature not higher than 70 DEG C, and the fine filter, insurance filtering, re deposited oil tank storage irrigation. For the deodorization of rice bran oil, tea seed oil, corn germ oil and fat (wax) with high content of oil should also further dewaxing and degreasing.
Suitable varieties: rice bran oil, tea seed oil, corn germ oil, animal oil and impurities with high acid value.
Main equipment: heat exchanger, gas condensate, heater, combined deodorization tower, fatty acid collector, cooler, four stage steam jet pump, heater unit.