Camellia oil low-temperature ecological physical squeezing method

Abstract

The invention discloses a low-temperature ecological physical squeezing method for camellia oil. The method comprises the following steps: placing pretreated camellia seeds in an environment of less than or equal to 85 DEG C for smokeless air drying treatment; crushing the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder with a specific size; performing steaming treatment on the obtained camellia seed powder, and performing physical squeezing treatment on the steamed camellia seed powder to obtain crude oil; primarily filtering the squeezed crude oil by using a 100-mesh screen at normal temperature; and carrying out secondary filtration on the primarily filtered crude oil at normal temperature by using an air pressure oil filter to obtain the finished product camellia oil. According to the method, low-temperature smokeless air drying and then crushing and squeezing are adopted, most impurity components in the raw materials lose activity after air drying and are not easy to extrude during squeezing, so that the quality of crude oil is greatly improved, the finished product camellia oil can be obtained only through simple filtration, an organic solvent is not needed for purification, the problem of solvent residue does not exist, refining and fine filtration are not needed, and the cost is low. And nutrient substances are not damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of deep processing of camellia oil, and particularly to a low-temperature ecological physical pressing method for camellia oil. Background Art

[0002] Camellia oil is a high-quality and high-end edible oil extracted from camellia seeds. The commonly used extraction methods in the current industry are extraction method, aqueous enzymatic method, hot pressing method and cold pressing method. The extraction method has high efficiency and high oil yield, but it uses chemical solvents, which is criticized by consumers. Moreover, the crude oil obtained by the extraction method has many impurities and needs to be refined and purified before it can be consumed, and the refining and purification destroys the unique nutrients of camellia oil. The aqueous enzymatic method is ecological and healthy, but it has low efficiency and high cost, and has not been popularized in production. The hot pressing method has relatively high efficiency and high oil yield, but the temperature in the processing process is too high, and a severe Maillard reaction will occur, and the nutrients rich in camellia seeds are destroyed, and some harmful substances such as benzo(a)pyrene are produced. The crude oil obtained by the hot pressing method has poor quality and needs to be refined before it can be consumed, and the refining and purification further destroys the unique nutrients of camellia oil. The cold pressing method is ecological and healthy, but the oil yield is low and the production cost is relatively high. At present, most manufacturers using the extraction method and the hot pressing method have adopted a refining process to ensure the quality of the refined oil, but the unique nutrients of camellia oil are destroyed, and reducing the refining intensity has become a consensus in the industry. Therefore, the aqueous enzymatic method and the cold pressing method have emerged, but the crude oil obtained by the aqueous enzymatic method and the cold pressing method has a high moisture content and many impurities, and still needs to be moderately refined such as dehydration and degumming. Moreover, the flavor substances are thin, and the unique flavor of camellia oil is not typical, and even some users question its authenticity. Summary of the Invention

[0003] An embodiment of the present invention provides a low-temperature ecological physical pressing method for camellia oil, aiming to solve the problems of more impurities, high moisture content of the crude oil, and easy destruction of nutrients in the low-temperature pressing of camellia oil in the prior art.

[0004] An embodiment of the present invention provides a low-temperature ecological physical pressing method for camellia oil, including:

[0005] Placing the pretreated camellia seeds in an environment of ≤85°C for smokeless air drying;

[0006] Crushing the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder of a specific size;

[0007] Steaming the obtained camellia seed powder, and subjecting the steamed camellia seed powder to physical pressing to obtain crude oil;

[0008] Primarily filtering the pressed crude oil with a 100-mesh sieve at room temperature;

[0009] Secondarily filtering the primarily filtered crude oil with a pneumatic oil filter at room temperature to obtain finished camellia oil.

[0010] Furthermore, before subjecting the pre-treated camellia seeds to smokeless air-drying treatment in an environment of ≤85°C, it includes:

[0011] Sun-dry the picked camellia seeds, screen the sun-dried camellia seeds to obtain qualified camellia seeds, and clean the camellia seeds to remove impurities.

[0012] Furthermore, subjecting the air-dried camellia seeds to pulverization treatment at low temperature to obtain camellia seed powder of a specific size includes:

[0013] Subject the air-dried camellia seeds to pulverization treatment in a temperature environment of ≤30°C to obtain camellia seed powder with a size of ≤0.2 mm.

[0014] Furthermore, subjecting the steamed camellia seed powder to physical pressing treatment includes:

[0015] Cool down the steamed camellia seed powder, and load the camellia seed powder that meets the moisture threshold and temperature threshold into a vertical hydraulic oil press for physical pressing;

[0016] Alternatively, pre-press the steamed camellia seed powder to obtain a cake, and load the cake into a horizontal hydraulic oil press for physical pressing treatment.

[0017] Furthermore, cooling down the steamed camellia seed powder, and loading the camellia seed powder that meets the moisture threshold and temperature threshold into a vertical hydraulic oil press for physical pressing includes:

[0018] Naturally cool down the steamed camellia seed powder to make its temperature less than or equal to the temperature threshold, and measure the moisture content of the camellia seed powder;

[0019] Load the camellia seed powder with a moisture content less than or equal to the moisture threshold and a temperature less than or equal to the temperature threshold into a vertical hydraulic oil press, and conduct physical pressing treatment at normal temperature.

[0020] Furthermore, the moisture threshold is 8%, and the temperature threshold is: 70°C.

[0021] An embodiment of the present invention provides a low-temperature ecological physical pressing method for camellia oil. The method includes: placing pretreated camellia seeds in an environment of ≤85°C for smokeless air-drying; pulverizing the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder of a specific size; steaming the obtained camellia seed powder, and subjecting the steamed camellia seed powder to physical pressing to obtain crude oil; preliminarily filtering the pressed crude oil with a 100-mesh sieve at room temperature; and performing secondary filtering on the preliminarily filtered crude oil with a pneumatic oil filter at room temperature to obtain finished camellia oil. The embodiment of the present invention adopts low-temperature smokeless air-drying followed by pulverizing and pressing. Most of the impurity components in the raw materials lose their activity after air-drying and are not easily extruded during pressing, greatly improving the quality of the crude oil. Only simple filtering is required to obtain finished camellia oil, without the need to use organic solvents for purification, there is no problem of solvent residue, and there is no need for refining and fine filtering, and the nutrients are not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic flow chart of the low-temperature ecological physical pressing method for camellia oil provided by the embodiment of the present invention;

[0024] Figure 2 It is a schematic sub-flow chart of the low-temperature ecological physical pressing method for camellia oil provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] It should also be understood that the terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0028] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] Please refer to Figure 1 , Figure 1 which is a schematic flow chart of a low-temperature ecological physical pressing method for camellia oil provided by an embodiment of the present invention. The method includes steps S101 to S105.

[0030] Step S101: Place the pretreated camellia seeds in an environment of ≤85°C for smokeless air-drying treatment;

[0031] In this step, after pretreating the camellia seeds, place the camellia seeds in an environment of ≤85°C for smokeless air-drying treatment until the moisture of the camellia seeds reaches the pressing requirement.

[0032] In a specific embodiment, before step S101, it includes: drying the picked camellia seeds, screening the dried camellia seeds to obtain qualified camellia seeds, and cleaning the camellia seeds to remove impurities. In this embodiment, the specific steps for pretreating the camellia seeds are: drying and screening the picked camellia seeds, and then cleaning the screened camellia seeds to obtain qualified camellia seeds. When cleaning, it is necessary to completely remove rotten, insect-infested, moldy seeds and fruit shells, stones, stalks and other impurities.

[0033] Step S102: Crush the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder of a specific size;

[0034] In this step, place the air-dried camellia seeds in a low-temperature environment for crushing to obtain camellia seed powder of a characteristic size.

[0035] In a specific embodiment, step S102 includes: placing the air-dried camellia seeds in a temperature environment of ≤30°C for crushing treatment to obtain camellia seed powder with a size of ≤0.2 mm. In this embodiment, crush the camellia seeds in an environment where the temperature is lower than or equal to 30°C, and screen the size of the camellia seed powder to ≤0.2 mm. During the air-drying process, it is necessary to constantly monitor the temperature of the current environment to ensure that the temperature is always lower than or equal to 30°C.

[0036] Step S103: Steam the obtained camellia seed powder, and then perform physical pressing on the steamed camellia seed powder to obtain crude oil;

[0037] In this step, under normal pressure conditions, steam the camellia seed powder, and keep the temperature of the camellia seed powder at ≤100°C during the steaming process. Then, perform physical pressing on the steamed camellia seed powder to obtain crude oil.

[0038] In a specific embodiment, refer to Figure 2 , step S103 includes:

[0039] Step S301: Cool down the steamed camellia seed powder, and load the camellia seed powder that meets the moisture threshold and temperature threshold into a vertical hydraulic oil press for physical pressing;

[0040] Step S302: Alternatively, pre-press the steamed camellia seed powder to obtain a cake, and load the cake into a horizontal hydraulic oil press for physical pressing.

[0041] In this embodiment, the physical pressing process in step S103 can adopt step S301 or step S302. In step S301, by cooling down the steamed camellia seed powder, the moisture and temperature of the camellia seed powder are respectively reduced to the moisture threshold and temperature threshold, and then the camellia seed powder is loaded into a vertical hydraulic oil press for physical pressing; in step S302, by pre-pressing the steamed camellia seed powder, a cake is obtained, and then the cake is loaded into a horizontal hydraulic oil press for physical pressing.

[0042] In a specific embodiment, step S301 includes:

[0043] Naturally cool down the steamed camellia seed powder to make its temperature less than or equal to the temperature threshold, and measure the moisture content of the camellia seed powder;

[0044] Load the camellia seed powder with a moisture content less than or equal to the moisture threshold and a temperature less than or equal to the temperature threshold into a vertical hydraulic oil press, and perform physical pressing at room temperature.

[0045] In this embodiment, spread out and cool the steamed camellia seed powder to achieve the effect of natural cooling, test the moisture and temperature of the camellia seed powder. When the moisture content and temperature content of the camellia seed powder are respectively less than or equal to the moisture threshold and temperature threshold, load the camellia seed powder into a vertical hydraulic oil press and perform physical pressing at room temperature. Specifically, the moisture threshold is 8%, and the temperature threshold is 70°C.

[0046] Step S104: Initially filter the pressed crude oil through a 100-mesh sieve at room temperature;

[0047] In this step, the crude oil obtained by pressing in step S103 is screened at room temperature, specifically using a 100-mesh sieve for screening and filtering.

[0048] Step S105: Use a pneumatic oil filter to perform secondary filtration on the preliminarily filtered crude oil at room temperature to obtain finished camellia oil.

[0049] In this step, the preliminarily filtered crude oil is put into a pneumatic oil filter at room temperature for secondary filtration to obtain finished camellia oil.

[0050] In this embodiment, the low-temperature ecological physical pressing method for camellia oil includes the following steps:

[0051] S1: Dry the picked camellia seeds, screen the dried camellia seeds to obtain qualified camellia seeds, and clean the camellia seeds to remove impurities;

[0052] S2: Place the pretreated camellia seeds in an environment of ≤85°C for smokeless air-drying treatment to make the moisture reach the pressing requirement;

[0053] S3: Crush the air-dried camellia seeds in a low-temperature environment of ≤30°C to obtain camellia seed powder with a size of ≤0.2 mm;

[0054] S4: Steam the camellia seed powder under normal pressure at a temperature of ≤100°C; after obtaining the steamed camellia seed powder, perform step S51 or S52;

[0055] S51: Cool the steamed camellia seed powder to make its temperature drop to 70°C, measure the moisture content of the camellia seed powder, cool the steamed camellia seed powder, and load the camellia seed powder with a moisture content of ≤8% and a temperature of ≤70°C into a vertical hydraulic oil press for physical pressing;

[0056] S52: Pre-press the steamed camellia seed powder to obtain a cake, and load the cake into a horizontal hydraulic oil press for physical pressing;

[0057] S6: Perform preliminary filtration on the pressed crude oil with a 100-mesh sieve at room temperature;

[0058] S7: Use a pneumatic oil filter to perform secondary filtration on the preliminarily filtered crude oil at room temperature to obtain finished camellia oil.

[0059] In this embodiment, the temperature of the camellia seed powder in step S4 is specifically 95°C, the air-drying time in step S2 is 12 - 30 hours, and the air-drying temperature is 75 - 80°C.

[0060] In another specific embodiment, the low-temperature ecological physical pressing method for camellia oil includes the following steps:

[0061] S1. Dry the picked camellia seeds, screen the dried camellia seeds to obtain qualified camellia seeds, and clean the camellia seeds to remove impurities;

[0062] S2. Place the pretreated camellia seeds in an environment of ≤80°C for smokeless air-drying to make the moisture reach the pressing requirement;

[0063] S3. Crush the air-dried camellia seeds in a low-temperature environment of ≤30°C to obtain camellia seed powder with a size of ≤0.2 mm;

[0064] S4. Steam the camellia seed powder under normal pressure at a temperature of ≤99°C; After obtaining the steamed camellia seed powder, perform step S51 or S52;

[0065] S51. Cool the steamed camellia seed powder until its temperature drops to 70°C, measure the moisture content of the camellia seed powder, cool the steamed camellia seed powder, and load the camellia seed powder with a moisture content of ≤8% and a temperature of ≤70°C into a vertical hydraulic oil press for physical pressing;

[0066] S52. Pre-press the steamed camellia seed powder to obtain a cake, and load the cake into a horizontal hydraulic oil press for physical pressing;

[0067] S6. Initially filter the pressed crude oil through a 100-mesh sieve at room temperature;

[0068] S7. Secondarily filter the initially filtered crude oil with a pneumatic oil filter at room temperature to obtain finished camellia oil.

[0069] In another specific embodiment, the low-temperature ecological physical pressing method for camellia oil comprises the following steps:

[0070] S1. Dry the picked camellia seeds, screen the dried camellia seeds to obtain qualified camellia seeds, and clean the camellia seeds to remove impurities;

[0071] S2. Place the pretreated camellia seeds in an environment of ≤70°C for smokeless air-drying to make the moisture reach the pressing requirement;

[0072] S3. Crush the air-dried camellia seeds in a low-temperature environment of ≤30°C to obtain camellia seed powder with a size of ≤0.2 mm;

[0073] S4. Steam the camellia seed powder under normal pressure at a temperature of ≤98°C; After obtaining the steamed camellia seed powder, perform step S51 or S52;

[0074] S51. Cool the cooked camellia seed powder until its temperature drops to 70°C, and measure the moisture content of the camellia seed powder. Cool the cooked camellia seed powder, and load the camellia seed powder with a moisture content ≤ 8% and a temperature ≤ 70°C into a vertical hydraulic oil press for physical pressing;

[0075] S52. Pre-press the cooked camellia seed powder to obtain a cake, and load the cake into a horizontal hydraulic oil press for physical pressing;

[0076] S6. Initially filter the pressed crude oil through a 100-mesh sieve at room temperature;

[0077] S7. Secondarily filter the initially filtered crude oil with a pneumatic oil filter at room temperature to obtain finished camellia oil.

[0078] In the description of the specification, the embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0079] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. A low-temperature ecological physical pressing method for camellia oil, characterized in that, Including: Placing the pretreated camellia seeds in an environment of ≤85°C for smokeless air-drying treatment; Crushing the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder of a specific size; Steaming the obtained camellia seed powder and subjecting the steamed camellia seed powder to physical pressing to obtain crude oil; Primarily filtering the pressed crude oil through a 100-mesh sieve at room temperature; Secondarily filtering the primarily filtered crude oil with an air pressure oil filter at room temperature to obtain finished camellia oil.

2. The low-temperature ecological physical pressing method of camellia oil according to claim 1, characterized in that Before placing the pretreated camellia seeds in an environment of ≤85°C for smokeless air-drying treatment, it includes: Sun-drying the picked camellia seeds, screening the sun-dried camellia seeds to obtain qualified camellia seeds, and cleaning the camellia seeds to remove impurities.

3. The low-temperature ecological physical pressing method of camellia oil according to claim 1, characterized in that, The step of crushing the air-dried camellia seeds in a low-temperature environment to obtain camellia seed powder of a specific size includes: Placing the air-dried camellia seeds in a temperature environment of ≤30°C for crushing to obtain camellia seed powder with a size of ≤0.2 mm.

4. The low-temperature ecological physical pressing method of camellia oil according to claim 1, characterized in that, The step of subjecting the steamed camellia seed powder to physical pressing includes: Cooling the steamed camellia seed powder, and loading the camellia seed powder that meets the moisture threshold and temperature threshold into a vertical hydraulic oil press for physical pressing; Or, pre-pressing the steamed camellia seed powder to obtain a cake, and loading the cake into a horizontal hydraulic oil press for physical pressing treatment.

5. The low-temperature ecological physical pressing method of camellia oil according to claim 4, characterized in that, The step of cooling the steamed camellia seed powder, and loading the camellia seed powder that meets the moisture threshold and temperature threshold into a vertical hydraulic oil press for physical pressing includes: Naturally cooling the steamed camellia seed powder to make its temperature less than or equal to the temperature threshold, and measuring the moisture content of the camellia seed powder; Loading the camellia seed powder with a moisture content less than or equal to the moisture threshold and a temperature less than or equal to the temperature threshold into a vertical hydraulic oil press, and performing physical pressing treatment at room temperature.

6. The low-temperature ecological physical pressing method of camellia oil according to claim 5, characterized in that, The moisture threshold is 8%, and the temperature threshold is: 70°C.

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