Oil Expellers, Oil Milling Plants, Oil Processing Plants, Oil Refinery Plant, Cooking Oil Refinery Machine, Edible Oil Solvent Extraction Plant
Oil refinery plant usually includes the following sections: Degumming, Neutralization, Bleaching, Dewaxing and Deodorization. The process of removing these impurities after oil extraction section is called oil refining. The crude oil obtained either from expellers or solvent extraction plant contains impurities, which must be removed to make the oil edible, more palatable and stable against rancidity upon storage.
Batch Type Oil Refinery Plant:
A batch type oil refinery plant is the most widely used system to refine different oils. This type of refining process is generally used for smaller capacity plants ranging from 2 Tons per Day to 30 Tons per Day. The batch refining system is preferred because it is low cost and quite easy to operate. This makes the batch process economical, low capital oriented and more viable for use up to 30 TPD.
The batch oil refinery process consists of different sections such as Neutralization, Bleaching, Deodorizing and Winterization.
Different equipments such as neutralizer, bleacher, deodorizer, cooler, heat exchanger, vacuum equipments, plate and frame filters, pressure leaf filters, thermic fluid boiler, cooling tower, valves and pipelines etc. are used with the batch process.
Process description for the batch type oil refinery plant:-
Following are the basic processes of edible oil refinery:
Neutralization Process
The crude oil is pumped to Neutralizer from oil mill or storage tank & first it is treated with weak solution of phosphoric acid or other suitable degumming agent for removing gums. Neutralizer is used remove the Free Fatty Acids (FFA) by adding caustic soda. Oil is heated up to about 60°C by heating coils and oil is stirred by the stirrer. The chemical reaction between free fatty acid and caustic soda forms the soap stock. This soap stock is allowed to settle down in the neutralizer from where it is collected into the soap pans. The oil is then washed with hot water to remove traces of soap particles and free alkali.
Bleaching Process
In the bleaching process, excess color from the oil is removed. Neutralized oil is heated in the bleacher vessel to remove excess moisture and thereafter it is treated with a measured quantity of bleaching earth and activated carbon. Nextly oil passes through a filter to separate bleach earth and bleached oil. Oil obtained after bleaching process is light in color and has good golden type appearance.
Deodorization / De-acidification Process
The deodorization process removes odor from the oil to improve the quality and self-life of the oil. The clean bleached oil is heated in the deodorizer to remove all the odiferous material such as phenols, ketones, tocopherols, aldehydes etc. The oil is heated in the deodorizer above 110°C through thermic fluid coils and then live steam is given to the oil from the bottom steam nozzles and temperature of oil is raised up to 200 to 220°C through thermic fluid coils. Entire process is done under high vacuum. Thus smell is removed from the oil in the deodorizer.
Cooling Process
The deodorized oil needs to be cooled at the atmospheric temperature to avoid oxidation. The deodorized oil is cooled in the cooler vessel. The water circulating coils take away the heat and the oil is cooled.
Once the process cycle is complete the oil obtained will be RBD oil which is light in color. After cooling it will pass through polishing filter to obtain sparkling light color & odorless oil for packing, which will be used as final edible oil for cooking.
De-waxing Process
Dewaxing process is carried out for
Sunflower and Rice Bran Oil as they contain waxes compared to other oil. This wax is removed by the dewaxing process. The oils are subjected to winterization process. The oil is first processed in the crystallizer where it is cooled by chilled water circulation. Low temperature results in the formation of crystals which are removed in the filtration process.
Thermic Fluid Boiler, Vacuum Pump, Barometric Condenser, Catchalls, Steam Generator etc. play their role in the refining process. So these equipments are part of the refinery and connected with the vessels through pipelines.
Some oils are dewaxed before packing so as to remove waxes, which are dissolved in the oil. Most of the oils do not need dewaxing as they contain little or no waxes. Only sunflower oil & Rice Bran oil contain appreciable quantities of wax to give a hazy appearance during winter season due to precipitation of dissolved waxes and hence require to be dewaxed. Dewaxing is carried out by chilling the oil up to 10-15°C followed by filtration of precipitated solids. The oil thus treated gives a sparkling appearance even in winter temperatures.
Winterisation is another name to the process of dewaxing. The name winterization appears as during winter when the temperature is low, waxes present in the oil crystallizes, they give hazy appearance to the oil.
Description
Dewaxing (also called winterization) of sunflower oil is essential when the oil is to be used as salad oil. The presence of wax makes the oil appear cloudy at room temperature. The oil normally becomes cloudy in 5–6h but with proper dewaxing the oil remains clear after 24h of storage at 0˚C.
The following steps are used to dewax sunflower oil:
Crude oil is refined and bleached to low phosphorus (<1ppm) and low moisture content (<0.1%).
The oil is heated to 55˚C to make sure the oil is fully liquid.
The oil is cooled slowly to 7–8˚C.
Cooled oil is held in a specially insulated tank with a special slow-speed mechanical agitator.
Preferably, the oil is held for 12–24h at this temperature.
The oil is mixed with diatomaceous earth/filter aid through an in-line mixing system and filtered through a pressure leaf filter pre-coated with diatomaceous earth/filter aid.
The filtered oil is collected, checked for cold test and filterable impurities, and then deodorized.
The deodorized oil is checked again for cold test along with the other analyses listed earlier.
Available capacity for batch type refinery system: 1-3-TPD, 5-TPD, 10-TPD and 30-TPD.
FAQ:
Our
Sinoder Indutech Machinery Company supply the complete set of Cooking oil production line machinery including sunflower oil production line, palm oil production line, soya bean oil production line, peanut oil production line, cotton seeds oil production line, maize corn germ oil production line, clamelia oil production line, rapeseeds oil production line, canola oil production line, coconut cropra oil production line, shea oil production line, groundnuts oil line, sesame oil production line,black seeds oil production line, jatropha seeds oil production line,moringa seeds oil production line and other vegetables oil processing machines.
Q1 : Which kind of materials can be processed?
All kinds of oil seeds. For example, sunflower seeds, rice bran, corn germ, palm fruit, palm kernel,coconut,peanut, soybean, sesame, cottonseeds, rapeseed, etc.
Q2 : What's the capacity?
Generally, 10-5000 tons per day. We can also manufacture as per customers' requirements.
Q3 : How long is the warranty?
The main parts of the machine come with one year warranty and after the expiration our engineer is available overseas to do the maintenance work.
Q4 : Can the machine be installed locally?
We can do the turn-key projects or other services according to customers'requirements,according to this condition,our services can be manufacturing,purchasing,transporting,installation,training labors etc.
Q5 : How to operate the machine?
Our engineers will be available to guide and train your labors how to operate and run the machine.
If you want to know more the vegetable oil processing machines and cooking oil refinery plants, pls feel free to visit our special webstie: http://www.oilgrainmachine.com and send us the detail requirements by email.
E-mail: rockwell@sinoder.com
Mobile Phone/Whatsapp: 0086-18037503060 (Mr.Rockwell Ni)
