CN116042303A - Method for separating oil residue by low-temperature physical drying of virgin camellia oil - Google Patents

Method for separating oil residue by low-temperature physical drying of virgin camellia oil Download PDF

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Publication number
CN116042303A
CN116042303A CN202310039627.7A CN202310039627A CN116042303A CN 116042303 A CN116042303 A CN 116042303A CN 202310039627 A CN202310039627 A CN 202310039627A CN 116042303 A CN116042303 A CN 116042303A
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oil
camellia
drying
crude
seeds
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陈鹏
陈修权
唐颖
杜程丽
张琴
陶书会
陈远曼
植悦洋
罗卿龙
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Guangxi Sanmenjiang Ecological Camellia Oil Co ltd
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Guangxi Sanmenjiang Ecological Camellia Oil Co ltd
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Priority to CN202310039627.7A priority Critical patent/CN116042303A/en
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00—Production of fats or fatty oils from raw materials
    • C11B1/02—Pretreatment
    • C11B1/04—Pretreatment of vegetable raw material
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00—Production of fats or fatty oils from raw materials
    • C11B1/06—Production of fats or fatty oils from raw materials by pressing
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00—Refining fats or fatty oils
    • C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00—Refining fats or fatty oils
    • C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Fats And Perfumes (AREA)

Abstract

The invention discloses a method for separating oil residue from virgin camellia oil by low-temperature physical drying, which comprises the steps of drying, crushing, steaming and frying, rolling embryo, wherein the low-temperature physical drying and separating oil residue is obtained by heating virgin camellia crude oil by low-temperature steam, filtering the heated virgin camellia crude oil and carrying out air-pressure air oil-blowing residue treatment. According to the method, the drying process adopts a drying-storage-drying mode, so that the camellia seeds are subjected to after-ripening to improve the oil content of the camellia seeds, the preparation process is strictly controlled to improve the oil yield of the camellia seeds, and the crude oil of the virgin original camellia oil with smaller water content is obtained by physically drying and separating oil residues at a low temperature, so that the quality of the camellia oil is improved and the storage time is prolonged.

Description

Method for separating oil residue by low-temperature physical drying of virgin camellia oil
Technical Field
The invention relates to the technical field of tea oil processing, in particular to a method for separating oil residues by low-temperature physical drying of virgin tea oil.
Background
The oil tea is a special high-quality edible oil plant in China, and is also called as four woody edible oil plants in the world together with oil palm, olive and coconut. The fruit (seed) of Camellia oleifera is Camellia oleifera fruit, which comprises shell, seed shell and tea seed kernel, and the oil extracted from tea seed kernel is camellia oleifera oil.
The camellia oil has unique flavor and health care effect, and is high-quality edible oil which is popular with the masses. The camellia oil has unique flavor because the camellia oil contains squalene and tea polyphenol, and the squalene and the tea polyphenol are required to be steamed, fried and pressed under a certain temperature range and separated from oil residues, so that the camellia oil can be kept, otherwise, the camellia oil is decomposed along with the increase of the processing temperature or a large amount of the camellia oil remains in the oil residues.
In the preparation mode of the camellia oil, the content of benzopyrene in the camellia oil exceeds the national edible oil sanitation standard due to the high-temperature treatment in the traditional camellia oil processing technology. In the initial squeezing process of the camellia oil, oil residues are mixed in the camellia oil after flowing out along with the camellia oil, so that unclean virgin crude oil containing a suspension of the camellia oil and the oil residues is obtained, the moisture of the crude oil is more than or equal to 0.15%, and the moisture in the camellia oil is higher, so that the camellia oil is not easy to store. If crude oil is simply filtered to discard oil residues, the residual oil in the oil residues is high, so that resource waste is caused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a method for physically drying and separating oil residues of virgin camellia oil at a low temperature, which aims to simplify the processing process of the camellia oil, improve the clarity of the camellia oil and reduce the moisture content in the camellia oil.
In order to achieve the above purpose, the invention provides a method for physically drying and separating oil residues of virgin camellia oil at a low temperature, which is characterized by comprising the following steps:
drying the camellia seeds: drying, storing and drying the camellia seeds to obtain camellia seeds with the water content less than or equal to 9%;
crushing: crushing the camellia seeds with the water content less than or equal to 9% to obtain camellia seed green embryo fragments;
steaming and parching: steaming, parching and curing the camellia seed raw embryo pieces to obtain camellia seed cooked embryo pieces;
rolling blanks: squeezing the camellia seed mature embryo to obtain virgin camellia crude oil;
low-temperature physical drying and separating oil residues: the method comprises the steps of collecting crude camellia oil in an oil tank, heating and drying the crude camellia oil by a steam heating pipe arranged in the oil tank, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 30-55 ℃, pumping the crude camellia oil in the oil tank into a filter by an electric pressure pump to filter if the water content of the crude camellia oil is less than or equal to 0.09%, connecting the filter with the outside through an upper oil pipe, a middle oil pipe and a lower oil pipe, wherein the upper oil pipe is an overflow oil return pipe and is connected with the oil tank, the middle oil pipe is an oil outlet pipe and is connected with a crude oil tank, the lower oil pipe is an oil inlet pipe and is connected with an electric pressure pump, and three pipelines are all provided with air-pressure connecting ports which are used for blowing oil residues by introducing air in the later stage of oil residue filtering, so that the filtering pressure of the crude camellia oil with primary taste is less than or equal to 0.4MPa.
Preferably, in the above technical scheme, in the step of drying the tea seeds, the temperature of the drying treatment is 55-60 ℃, the tea seeds are dried to a water content of 15% -20%, the tea seeds are stored in a ventilation place for 26-54d, the temperature of the re-drying treatment is 50-60 ℃, and the tea seeds are dried to a water content of less than or equal to 9%.
Preferably, in the above technical scheme, in the step of crushing the camellia seeds, a crusher is used for crushing the camellia seeds with the water content less than or equal to 9% to obtain camellia seed green embryo fragments, and the crushing rate is controlled to be 85-100%.
Preferably, in the above technical solution, in the crushing step, the crushing power of the crusher is controlled to be 0.5KW-0.8KW.
Preferably, in the above technical scheme, in the step of steaming and frying, a steaming and frying pan is adopted to steam and fry the raw embryo pieces of the camellia seeds, and the steaming and frying temperature is kept at 70-85 ℃ to obtain the cooked embryo pieces of the camellia seeds.
Preferably, in the above technical scheme, in the step of rolling the embryo, the cooling treatment is performed on the broken camellia seed embryo, wherein the cooling treatment is performed by adopting cooling equipment to cool the camellia seed to 25-33 ℃, and adopting a double screw squeezer to roll the cooled camellia seed broken embryo.
Preferably, in the above technical solution, in the step of rolling the blank, a gap between cake segments of the double screw press is adjusted to 5-8mm, until the cake is discharged in tile shape, and then a gap between cake ends of the double screw press is gradually adjusted to 2-4mm.
Preferably, in the above technical solution, in the step of physically drying and separating the oil residue at low temperature, the steam introducing rate in the steam heating pipe is 40-65m/s.
Preferably, in the above technical solution, in the step of physically drying and separating the oil residue at low temperature, when the temperature of the crude oil in the oil tank is raised to 40-50 ℃, the crude oil in the oil tank is pumped into the filter by an electric pressure pump for filtering.
Preferably, in the above technical solution, in the step of physically drying and separating the oil residue at low temperature, the air-pressure air-inlet rate in the air-pressure air-blowing oil residue operation is 50-60m/s.
Compared with the prior art, the invention has the following beneficial effects:
(1) The method mainly adopts a mode of introducing steam into a steam heating pipe to heat and dry crude camellia oil, avoids secondary pollution of crude oil caused by direct contact of a heat source with the crude oil, and uses a filter with a plurality of layers of precise filter screens arranged inside to control the filtration pressure range to filter the crude oil, thereby purposefully obtaining the crude camellia oil finished product with high clarity and low moisture content, improving the quality of the camellia oil and prolonging the storage time of the camellia oil.
(2) The tea seeds are subjected to drying, storage and drying treatment to have the tea seeds after-ripening effect, the oil yield can be increased, the tea oil quality can be improved during oil extraction, the water content of the tea seeds is controlled to be less than or equal to 9% through re-drying treatment, the steaming and frying temperature is strictly controlled to be 70-85 ℃ in the steaming and frying process, the precipitation of flavor substances such as squalene, tea polyphenol and the like is increased, the condition of burning during high-temperature steaming and frying is avoided, and the generation of benzopyrene in the tea oil is reduced.
Drawings
FIG. 1 is a schematic diagram of a low temperature physical drying and oil residue separating apparatus for crude oil processing of virgin oil tea according to the present invention;
FIG. 2 is a schematic view of the structure of a fixed filter element assembly in a low temperature physical drying and oil residue separating apparatus according to the present invention;
symbol in the figure illustrates: 1-an oil sump arrangement; 101-an oil sump housing; 121-a steam heating pipe; 122-steam heating pipe valve; 13-an electric pressure pump; 131-an oil inlet of an electric pressure pump; 14-a temperature display screen; 141-a temperature probe; 2-filter means; 21-a filter housing; 221-overflow return line; 222-an oil inlet pipe; 223-an oil outlet pipe; 231-pressure gauge; 232-supporting rods; 233-a rotating assembly; 234-fixing the filter element; 2341-filtration pores; 235-differential pressure controller; 236-a drain; 24-a filter element; 3-an crude oil tank; 31-crude oil tank cover; 32-an oil outlet; 33-a lid handle; 34-oil drainage groove.
Detailed Description
The following description of the embodiments of the present invention will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present invention. Based on the embodiments of the present invention, one of ordinary skill in the art would obtain all other embodiments without making any inventive effort, which would fall within the scope of the present invention. The following detailed description of the present invention is made in connection with specific examples, but it should be understood that the scope of the invention is not limited by the specific examples.
The preparation of the virgin camellia crude oil specifically comprises the following steps: drying, crushing, steaming and parching tea seeds, and rolling embryo. Specifically, in the drying treatment step, three steps of drying, storage and drying are adopted, the camellia seeds are dried to the water content of 15-20% mainly by utilizing the after-ripening effect of the camellia seeds after harvesting, the camellia seeds are not easy to mould in the storage process within the water content range, the camellia seeds are stored for 26-54d in a ventilation place, and then secondary drying is carried out to reduce the water content in the camellia seeds to be less than or equal to 9%. The water content of the camellia seeds is strictly controlled by carrying out primary drying on the camellia seeds, so that mildew of the camellia seeds is reduced in the storage process, the quality of raw materials is reduced, and the camellia seeds have physiological characteristics of after-ripening; the storage time is strictly controlled, so that tea oil is timely processed and extracted while the tea seeds are fully after-ripened, the oil content in the tea seeds is improved, and the quality of the tea oil is obtained after the tea seeds are squeezed; the secondary drying strictly controls the water content range of the camellia seeds, reduces the scorching of the camellia seeds in the steaming and frying heating process, and simultaneously reduces the water content of the obtained virgin camellia crude oil.
Specifically, in the crushing treatment step, crushing power of a crusher is controlled to be 0.5KW-0.8KW to obtain camellia seed green embryo crushing, and the parameters can be specifically selected according to working condition requirements, for example, the crushing power of the crusher is 0.5KW; the crushing power of the crusher is 0.6KW; the crushing power of the crusher is 0.7KW; the crushing power of the crusher is 0.8KW. Therefore, the crushing rate of the camellia seeds is 85-100%, the camellia seeds can slide each other in the embryo rolling process to cause insufficient embryo rolling due to the fact that the camellia seeds are spherical or olive-shaped, the friction force among the camellia seeds is improved in the embryo rolling process through crushing the camellia seeds, the oil yield and the squeezing efficiency are improved, and the crusher is cleaned and inspected before and after each crushing to ensure the crushing effect, and is repaired in time.
Specifically, the sasanqua seed raw embryo pieces are steamed and fried, and the sasanqua seed raw embryo pieces are steamed and fried by adopting a steaming and frying pan, and the temperature of the steaming and frying is kept at 70-85 ℃ to obtain the sasanqua seed cooked embryo pieces. The method mainly comprises the steps of wetting, heating, steaming and frying the blank pieces of camellia seeds, so that the blank pieces generate certain physical and chemical changes, the internal structure of the blank pieces of camellia seeds is changed, and the process of converting the blank pieces into mature blanks is convenient for squalene and tea polyphenol in camellia oleifera to form micromolecule substance mixed grease, and the steaming and frying temperature range of a steaming and frying pot is strictly controlled to be 70-85 ℃ so as not to reach the temperature range for thermally decomposing squalene and tea polyphenol substances in camellia oleifera, so that the content of squalene and tea polyphenol substances in camellia oleifera is improved. Meanwhile, the steaming and frying temperature ranges from 70 ℃ to 85 ℃ and is matched with continuous stir-frying of a steaming and frying pot, and the raw embryo of the camellia seed is not easy to be burnt due to overhigh local temperature in the steaming and frying process, so that the benzopyrene content in the crude camellia oil is reduced.
Specifically, the embryo rolling treatment is carried out on the cooked embryo crushing of the camellia seeds, the squeezer is a double screw, the installation and the rotation directions of the squeezing screw and the conveying screw are opposite, so that after the conveying screw enters a squeezing area, the direction of the squeezing screw is converted, and pressure is generated, so that a first squeezing process is formed; the conveying screw pushes the materials entering the feed box to the pressing screw, under the action of the sieve wall and the conical body, tea oil contained in the ripe embryo of the camellia seed is extruded by the screw pitch reduction and the shaft diameter increase of the pressing screw, the extruded tea oil flows out of the sieve tube and is concentrated in the oil receiving groove to form the crude camellia oil. The squeezer can be selected according to the squeezing needs, but the double screw squeezer of this application adopts the double screw squeezer, keeps pressing the ripe embryo garrulous temperature of preceding tea-oil camellia seed to keep at 25-33 ℃, adjusts the gap of the cake end of double screw squeezer, keeps the clearance of play cake end to be 5mm-8mm and is suitable, lets the material embryo pass through the press cage smoothly after pressing until the material cake is the tile form and discharges, adjusts the size of unloading door according to the material cake discharge condition again, and the whole pressing process keeps the pressing temperature in the press cage to keep not higher than 40 ℃. The press temperature was kept within 40 ℃ by adjusting the size of the blanking gate. After the cake is tile-shaped and discharged, gradually shrinking and maintaining the gap of the cake discharging end to 2mm-4mm. In the pressing process, the residual oil rate in the cake is controlled within 5% by detecting the temperature, the moisture content, the appearance of the blank, the residual oil in the cake and other technological indexes.
Next, referring to fig. 1 to 2, the apparatus for physically drying and separating oil residues at low temperature according to the embodiment of the method of the present invention includes an oil tank 1, a filter 2, and a crude oil tank 3. The specific structure is as follows: the oil tank 1 top is equipped with the oil inlet, in being linked to each other with overflow oil return pipe 221 that filter 2 left side upper portion was equipped with, top left side is equipped with temperature display 14, temperature display 14 lower link temperature probe 141, be convenient for observe the condition of camellia crude oil temperature variation, carry out the filtration stage of next step, the central authorities are equipped with evenly distributed "back" shape steam heating pipe 121 in the oil tank 1 device, steam heating pipe 121 exit end locates oil tank 1 left side, steam heating pipe 121 entrance point is located oil tank 1 right side bottom, the entrance point is equipped with steam heating pipe valve 122, be used for controlling the dry camellia crude oil process of steam heating, oil tank 1 bottom right side is equipped with electric pressure pump 13, be used for drawing in the filter with the virgin camellia crude oil after the heating drying, electric pressure pump 13 left side lower part is equipped with electric pressure pump oil inlet 131, electric pressure pump 13 upper portion right side is equipped with electric pressure pump oil outlet connection filter 2 left side lower part is equipped with down department pipe oil inlet pipe 222 links to each other. The upper central part of the filter 2 is provided with a pressure gauge 231, so that the filtering pressure condition of the internal structure of the filter element in the filter can be monitored in real time, and the filtering condition of the filter can be known and regulated in time. The pressure gauge 231 is connected with the supporting rod 232, the center of the supporting rod 232 is provided with the differential pressure controller 235, the lower part of the supporting rod 232 is provided with the drain outlet 236, the supporting rod 232 is connected with the rotating component 233, the rotating component 233 is connected with the fixed filter core 234, the fixed filter core 234 is provided with the filter holes 2341, the fixed filter core 234 is provided with the filter core 24, and the filter core 24 is provided with a multi-layer high-precision filter screen. The upper left side of the filter shell 21 is provided with an overflow oil return pipe 221 which is connected with the oil groove 1, the lower left side of the filter shell 21 is provided with an oil inlet pipe 222, the middle right side of the filter shell 21 is provided with an oil outlet pipe 223, and the oil outlet pipe 223 is connected with the oil guiding groove 34 in the crude oil tank 3. An oil outlet 32 is arranged at the lower part of the right side of the crude oil tank 3, so that the obtained crude camellia crude oil can be split and packaged conveniently, and a cover handle 33 is arranged at the center of the top of a crude oil tank cover 31 matched with the crude oil tank 3. The specific implementation process is as follows: the obtained crude camellia oil is collected in the oil tank 1, after the crude camellia oil completely passes through the steam heating pipe 121 arranged in the oil tank 1, the steam heating pipe valve 122 is opened, steam is introduced into the steam heating pipe 121 to heat and raise the temperature of the crude camellia oil in the oil tank 1, and the steam indirectly heats and dries the crude camellia oil through the steam heating pipe 121, so that the water content of the crude camellia oil is less than or equal to 0.09%, and meanwhile, the heat source is prevented from directly contacting the crude camellia oil, and secondary pollution of the crude camellia oil is avoided. When the temperature display screen 14 shows that the temperature of crude oil rises to 30-55 ℃, the electric pressure pump 13 is used for pumping the crude oil of the virgin camellia after heating and drying from the electric pressure pump oil inlet 131, then the crude oil enters the filter 2 from the oil inlet 222, the crude oil of the camellia enters the filter core 24 from the filter holes 2341 on the fixed filter core 234, the crude oil of the virgin camellia is filtered under the combined action of the multi-layer high-precision filter screen in the filter core 24 and the filtering pressure of the filter, and the crude oil of the virgin camellia obtained after the filtering is stored in the crude oil tank 3 from the oil outlet pipe 223. And then carrying out slag blowing operation on the residual oil slag by using air pressure. The steam heating pipe is arranged in the oil groove, the camellia crude oil is heated by utilizing hot steam, the temperature of the hot steam is lower, the moisture in the virgin camellia crude oil can be dried, the moisture content of the camellia oil is less than or equal to 0.09%, benzopyrene is not generated by the camellia crude oil due to high temperature, and the unique flavor substances squalene and tea polyphenol in the camellia oil are decomposed. The camellia oil is sucked into an oil inlet pipe at the lower part of the filter, and the crude oil with high clarity and primary taste is obtained through the filtering pressure of the filter which is less than or equal to 0.4MPa and the filtering and air pressure effects of a plurality of layers of high-precision filter screens arranged in the oil inlet pipe.
Example 1
A method for separating oil residue from virgin camellia oil by low-temperature physical drying comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at the temperature of 60 ℃ until the water content of the camellia seeds is 20%, placing the dried camellia seeds in a ventilation place for storage for 46d, and re-drying the camellia seeds at the temperature of 55 ℃ until the water content of the camellia seeds is 8%, so as to obtain the camellia seeds with the water content of 8%;
(2) Crushing: crushing the camellia seeds with the water content of 8% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 100%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 70 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by cooling equipment, and cooling the camellia seed cooked embryo pieces to 25 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 25 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 40 ℃, detecting to obtain the water content of the camellia oil to be 0.03%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.4MPa, filtering the crude camellia oil, and then pumping air with the speed of 60m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Example 2
The method for separating oil residues by low-temperature physical drying of the virgin camellia oil comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at the temperature of 60 ℃ until the water content of the camellia seeds is 15%, placing the dried camellia seeds in a ventilation place for storage for 54d, and re-drying the camellia seeds at the temperature of 55 ℃ until the water content of the camellia seeds is 9%, so as to obtain the camellia seeds with the water content of 9%;
(2) Crushing: crushing the camellia seeds with the water content of 9% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 85%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to 80 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by using cooling equipment, and cooling the camellia seed cooked embryo pieces to 27 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of the camellia seeds at the temperature of 27 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and the crude camellia oil and the tea cake are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 50 ℃, detecting to obtain the water content of the camellia oil to be 0.03%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.3MPa, filtering the crude camellia oil, and then pumping air with the speed of 55m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Example 3
A method for separating oil residue from virgin camellia oil by low-temperature physical drying comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at 58 ℃ until the water content of the camellia seeds is 18%, placing the dried camellia seeds in a ventilation place for storage for 46d, and re-drying the camellia seeds at 60 ℃ until the water content of the camellia seeds is 8%, so as to obtain the camellia seeds with the water content of 8%;
(2) Crushing: crushing the camellia seeds with the water content of 8% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 90%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 85 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by using cooling equipment, and cooling the camellia seed cooked embryo pieces to 28 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of the camellia seeds at 28 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 45 ℃, detecting to obtain the water content of the camellia oil to be 0.04%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.2MPa, filtering the crude camellia oil, and then pumping air with the speed of 50m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Example 4
A method for separating oil residue from virgin camellia oil by low-temperature physical drying comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at 58 ℃ until the water content of the camellia seeds is 20%, placing the dried camellia seeds in a ventilation place for storage for 41d, and re-drying the camellia seeds at 60 ℃ until the water content of the camellia seeds is 9%, so as to obtain the camellia seeds with the water content of 9%;
(2) Crushing: crushing the camellia seeds with the water content of 9% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 95%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 70 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by cooling equipment, and cooling the camellia seed cooked embryo pieces to 30 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 30 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 40 ℃, detecting to obtain the water content of the camellia oil to be 0.05%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.4MPa, filtering the crude camellia oil, and then pumping air with the speed of 55m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Example 5
A method for separating oil residue from virgin camellia oil by low-temperature physical drying comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at 55 ℃ until the water content of the camellia seeds is 18%, placing the dried camellia seeds in a ventilation place for storage for 31d, and re-drying the camellia seeds at 50 ℃ until the water content of the camellia seeds is 7%, so as to obtain the camellia seeds with the water content of 7%;
(2) Crushing: crushing the camellia seeds with the water content of 7% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 95%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 75 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by using cooling equipment, and cooling the camellia seed cooked embryo pieces to 31 ℃;
(4) Rolling blanks: squeezing the cooked camellia seed embryo pieces at 31 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and the crude camellia oil and the tea cake are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 50 ℃, detecting to obtain the water content of the camellia oil to be 0.04%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.3MPa, filtering the crude camellia oil, and then pumping air with the speed of 50m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Example 6
A method for separating oil residue from virgin camellia oil by low-temperature physical drying comprises the following steps:
(1) Drying the camellia seeds: drying the camellia seeds at 55 ℃ until the water content of the camellia seeds is 15%, placing the dried camellia seeds in a ventilation place for 26d, and re-drying the camellia seeds at 50 ℃ until the water content of the camellia seeds is 6%, so as to obtain the camellia seeds with the water content of 6%;
(2) Crushing: crushing the camellia seeds with the water content of 6% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 90%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 85 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by using cooling equipment, and cooling the camellia seed cooked embryo pieces to 33 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of the camellia seeds at 33 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and the crude camellia oil and the tea cake are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 45 ℃, detecting to obtain the water content of the camellia oil to be 0.02%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.3MPa, filtering the crude camellia oil, and then pumping air with the speed of 60m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Comparative example 1
Substantially the same as in example 1, except that the oil residue separation treatment was different.
(1) Drying the camellia seeds: drying the camellia seeds at the temperature of 60 ℃ until the water content of the camellia seeds is 20%, placing the dried camellia seeds in a ventilation place for storage for 46d, and re-drying the camellia seeds at the temperature of 55 ℃ until the water content of the camellia seeds is 8%, so as to obtain the camellia seeds with the water content of 8%;
(2) Crushing: crushing the camellia seeds with the water content of 8% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 100%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 70 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by cooling equipment, and cooling the camellia seed cooked embryo pieces to 25 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 25 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Directly filtering the crude camellia oil with a filter to obtain crude camellia oil with primary taste.
Comparative example 2
Substantially the same as in example 1, except that camellia seed was dried in a different manner.
(1) Drying the camellia seeds: drying for only one time, wherein the temperature of the drying treatment is 50-60 ℃, and the oil tea seeds are dried until the water content of the oil tea seeds is 7%;
(2) Crushing: crushing the camellia seeds with the water content of 7% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 100%;
(3) Steaming and parching: placing the camellia seed green embryo pieces in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 70 ℃, steaming and frying to obtain camellia seed cooked embryo pieces, cooling the camellia seed cooked embryo pieces by cooling equipment, and cooling the camellia seed cooked embryo pieces to 25 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 25 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 40 ℃, detecting to obtain the water content of the camellia oil to be 0.04%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.4MPa, filtering the crude camellia oil, and then pumping air with the speed of 60m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Comparative example 3
Substantially the same as in example 1, except that the steaming and frying temperature and the crushing rate were different.
(1) Drying the camellia seeds: drying the camellia seeds at the temperature of 60 ℃ until the water content of the camellia seeds is 20%, placing the dried camellia seeds in a ventilation place for storage for 46d, and re-drying the camellia seeds at the temperature of 55 ℃ until the water content of the camellia seeds is 8%, so as to obtain the camellia seeds with the water content of 8%;
(2) Crushing: crushing the camellia seeds with the water content of 8% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 60%;
(3) Steaming and parching: placing the sasanqua seed raw embryo pieces in a sasanqua steaming and frying pan, setting the temperature of the steaming and frying pan to be 110-130 ℃, steaming and frying to obtain sasanqua seed cooked embryo pieces, cooling the sasanqua seed cooked embryo pieces by using cooling equipment, and cooling the sasanqua seed cooked embryo pieces to 25 ℃;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 25 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 40 ℃, detecting to obtain the water content of the camellia oil to be 0.04%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.4MPa, filtering the crude camellia oil, and then pumping air with the speed of 60m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
Comparative example 4
Example 1 was essentially the same, except that the crude virgin camellia oil was obtained in different steps.
(1) Drying the camellia seeds: drying the camellia seeds at 55 ℃ until the water content of the camellia seeds is 20%, and re-drying the camellia seeds at 60 ℃ until the water content of the camellia seeds is 10%, so as to obtain the camellia seeds with the water content of 10%;
(3) Steaming and parching: placing the camellia seeds in a camellia steaming and frying pan, setting the temperature of the steaming and frying pan to be 110-130 ℃, and steaming and frying to obtain the camellia seeds;
(4) Rolling blanks: squeezing cooked camellia seeds obtained by steaming and frying by adopting a double-screw squeezer, wherein the cake section gap of the double-screw squeezer is regulated in the squeezing process, the temperature of a squeezing cage is not controlled, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: and collecting crude camellia oil in the oil tank provided with the steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 40 ℃, detecting to obtain the water content of the camellia oil to be 0.03%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.4MPa, and filtering the crude camellia oil to finally obtain the crude camellia oil with the primary taste.
Comparative example 5
Example 1 was essentially the same except that the operating power was different when separating the sludge.
(1) Drying the camellia seeds: drying the camellia seeds at the temperature of 60 ℃ until the water content of the camellia seeds is 20%, placing the dried camellia seeds in a ventilation place for storage for 46d, and re-drying the camellia seeds at the temperature of 55 ℃ until the water content of the camellia seeds is 6%, so as to obtain the camellia seeds with the water content of 6%;
(2) Crushing: crushing the camellia seeds with the water content of 6% by using a crusher to obtain camellia seed green embryo fragments, wherein the crushing rate is controlled at 100%;
(3) Steaming and parching: placing the broken green tea seeds into a tea steaming and frying pan, setting the temperature of the steaming and frying pan to be 70 ℃, and steaming and frying to obtain broken tea seed cooked green tea seeds;
(4) Rolling blanks: squeezing the ripe embryo pieces of camellia seeds at 25 ℃ by adopting a double screw squeezer, wherein the cake section gap and the squeezing cage temperature of the double screw squeezer are regulated to be within 40 ℃ in the squeezing process, and crude camellia oil and tea cakes are squeezed;
(5) Low-temperature physical drying and separating oil residues: collecting crude camellia oil in an oil tank provided with a steam heating pipe, heating and drying the crude camellia oil, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 30 ℃, detecting to obtain the water content of the camellia oil to be 0.10%, pumping the crude camellia oil in the oil tank into a filter by using an electric pressure pump, setting the filtering pressure of the filter to be 0.8MPa, filtering the crude camellia oil, and then pumping air with the speed of 40m/s to blow oil residues in the filter to finally obtain crude camellia oil with primary taste.
The examples and comparative examples differ in their preparation process. The partial mass of the pressed tea oil was measured in the manner of detection in national standard GB/T11765-2018 in examples 1-6 and comparative examples 1-5, and the results are shown in Table 1 below.
TABLE 1 determination of partial Mass of pressed tea oil
Figure BDA0004050528370000151
Figure BDA0004050528370000161
The oil contents, oil yields, benzopyrene contents, tea polyphenol contents of example 1 and comparative examples 1 to 5 were measured, and the results are shown in Table 2. The specific detection mode of the oil content is as follows: weighing 40-50g of crushed camellia seed green embryos from crushed camellia seed green embryos, introducing the crushed camellia seed green embryos into a mortar for grinding, putting the crushed camellia seed green embryos into a filter paper bag which is dried to constant weight, accurately weighing the total weight of a sample and a weighing bottle after the crushed camellia seed green embryos are dried to constant weight again, transferring the sample and the weighing bottle to a Soxhlet extractor, extracting for 6 hours, and placing the filter paper bag into a weighing bottle after petroleum ether volatilizes, and drying the filter paper bag to constant weight in a 105 ℃ oven; the oil content was calculated according to the following formula: oil content= (m 1 -m 2 )/(m 1 -m 0 ) X 100%; wherein m is 1 Refers to the weight of the weighing bottle and the sample before extraction, m 2 Refers to the weight of the weighing bottle and the sample after extraction, m 0 Refer to the mass of the measuring flask.
Specific detection mode of benzopyrene: the detection mode of the 5.1.3 grease and the products thereof in GB 5009.27-2016 is adopted for detection and calculation.
The content of tea polyphenols is determined by using gallic acid as standard substance and using Fu Lin Fen method.
TABLE 2 oil content, oil yield, benzopyrene content, tea polyphenol content of example 1 and comparative examples 1 to 5
Figure BDA0004050528370000162
As can be seen from the above tables 1 and 2, the camellia oil prepared by the preparation method of the virgin original camellia oil of the invention has various indexes superior to the national standard GB/T11765-2018 pressing first-level standard. In addition, in the preparation method of the virgin original camellia oil, the broken oil content of the camellia embryo, the oil yield of the final camellia seed and the content of tea polyphenol are higher than those of the conventional squeezing method, and the content of benzopyrene is lower than that of the conventional squeezing method.
The crude camellia oil obtained by the preparation method of example 1 and comparative examples 1 to 5 was stored in a sealed and light-tight dark glass bottle for 1 year in a cool, dry and light-tight environment, and then the oxidation and rancidity of the oil were detected by the detection method of GB/T11765-2018, and the results are shown in Table 3 below.
TABLE 3 oxidation and rancidity of tea oil after 1 year of storage
Figure BDA0004050528370000171
As shown in Table 3, the crude oil of the virgin camellia oil is obtained by physically drying and separating oil residues at low temperature, and compared with comparative examples 1 and 5, the acid value and peroxide value of the obtained crude oil of the virgin camellia oil after one year of storage are lower, which shows that the method of the invention achieves the effect of prolonging the storage time of the crude oil of the virgin camellia oil by oxidizing and rancidity of grease during storage by making the water content of the crude oil of the virgin camellia oil less than or equal to 0.09%.
It should be noted that the foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. A method for separating oil residue from virgin camellia oil by low-temperature physical drying, which is characterized by comprising the following steps:
drying the camellia seeds: drying, storing and drying the camellia seeds to obtain camellia seeds with the water content less than or equal to 9%;
crushing: crushing the camellia seeds with the water content less than or equal to 9% to obtain camellia seed green embryo fragments;
steaming and parching: steaming, parching and curing the camellia seed raw embryo pieces to obtain camellia seed cooked embryo pieces;
rolling blanks: squeezing the camellia seed mature embryo to obtain virgin camellia crude oil;
low-temperature physical drying and separating oil residues: the method comprises the steps of collecting crude camellia oil in an oil tank, heating and drying the crude camellia oil by a steam heating pipe arranged in the oil tank, detecting the water content of the crude camellia oil when the temperature of the crude camellia oil in the oil tank is increased to 30-55 ℃, pumping the crude camellia oil in the oil tank into a filter by an electric pressure pump to filter if the water content of the crude camellia oil is less than or equal to 0.09%, connecting the filter with the outside through an upper oil pipe, a middle oil pipe and a lower oil pipe, wherein the upper oil pipe is an overflow oil return pipe and is connected with the oil tank, the middle oil pipe is an oil outlet pipe and is connected with a crude oil tank, the lower oil pipe is an oil inlet pipe and is connected with an electric pressure pump, and three pipelines are all provided with air-pressure connecting ports which are used for blowing oil residues by introducing air in the later stage of oil residue filtering, so that the filtering pressure of the crude camellia oil with primary taste is less than or equal to 0.4MPa.
2. The method for physically drying and separating oil residue at low temperature from virgin camellia oil according to claim 1, wherein in the step of drying the camellia seeds, the temperature of the drying treatment is 55-60 ℃, the camellia seeds are dried to a water content of 15% -20%, the camellia seeds are stored in a ventilation place for 26-54d, the temperature of the re-drying treatment is 50-60 ℃, and the camellia seeds are dried to a water content of less than or equal to 9%.
3. The method for separating oil residues by low-temperature physical drying of virgin camellia oil according to claim 1, wherein in the step of crushing the camellia seeds, the camellia seeds with the water content less than or equal to 9% are crushed by using a crusher to obtain camellia seed green embryo pieces, and the crushing rate is controlled to be 85-100%.
4. A method of manufacturing according to claim 3, characterized in that in the crushing step the crushing power of the crusher is 0.5KW-0.8KW.
5. The method for separating oil residue by low-temperature physical drying of virgin camellia oil according to claim 1, wherein in the steaming and frying step, the raw embryo pieces of camellia seeds are steamed and fried by a steaming and frying pot, and the steaming and frying temperature is kept at 70-85 ℃ to obtain the cooked embryo pieces of camellia seeds.
6. The method for separating oil residue by low-temperature physical drying of virgin camellia oil according to claim 1, wherein in the step of rolling the embryo, the broken camellia seed embryo is subjected to cooling treatment, wherein the cooling treatment is to cool the broken camellia seed embryo to 25-33 ℃ by adopting cooling equipment, and the cooled camellia seed embryo is rolled by adopting a double screw squeezer.
7. The method of rolling blanks according to claims 1 and 6, wherein in the step of rolling blanks, the gap between cake sections of the double screw press is adjusted to 5-8mm, and the gap between cake ends of the double screw press is gradually adjusted to 2-4mm until the cake is discharged in a tile shape.
8. A method for low temperature physical drying and separating oil residue from virgin camellia oil according to claim 1, wherein in the step of low temperature physical drying and separating oil residue, the steam introducing rate in the steam heating pipe is 40-65m/s.
9. A method for low temperature physical drying and separating oil residue from virgin camellia oil according to claim 1, wherein in the step of low temperature physical drying and separating oil residue, when the temperature of crude oil in the oil tank is raised to 40-50 ℃, the crude oil in the oil tank is pumped into a filter by an electric pressure pump for filtering.
10. A method for low-temperature physical drying and separating oil residue from virgin camellia oil according to claim 1, wherein in the step of low-temperature physical drying and separating oil residue, the air pressure air inlet rate in the air pressure air blowing oil residue operation is 50-60m/s.
CN202310039627.7A 2023-01-12 2023-01-12 Method for separating oil residue by low-temperature physical drying of virgin camellia oil Pending CN116042303A (en)

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