Camellia seed husking, steaming and oil squeezing method

Abstract

The invention discloses a camellia seed husking, steaming and oil pressing method which comprises the following steps: step 1, centrifugally husking camellia seeds: husking the camellia seeds by adopting a centrifugal husking machine to obtain camellia seed kernels and husks; step 2, curing the tea seed kernels: softening the tea seed kernels in a steamer; step 3, flattening the tea seed kernels: pressing the softened tea seed kernels into slices by adopting a roller type crushing and flattening machine; step 4, drying: the tea seed kernel slices are put into an airflow dryer to be dried; 5, oil pressing: putting the dried tea seed kernels into a spiral oil press for oil pressing to obtain the camellia oil. The process can improve economic benefits and oil quality, and meets the development direction of medium and small-scale popularization of high-quality camellia oil new-quality productivity.

Description

Technical Field

[0001] The present invention relates to the technical field of camellia seed oil extraction, and more specifically, it relates to a method for shelling, steaming and oil extraction of camellia seeds in light industry and agricultural and sideline product processing. Background Art

[0002] Camellia oil is a valuable precious vegetable oil with high value in daily cooking, dietotherapy and medical treatment, and skin care fields. However, the current camellia seed pressing processes mainly include three types: twin-screw low-temperature pressing, ordinary traditional screw pressing, and hydraulic press pressing. Among them, twin-screw low-temperature pressing has the problem of high residual oil in the cake, high pressing cost and low benefit. Ordinary traditional screw pressing and hydraulic pressing processes use whole seeds for drying, high-temperature frying and pressing, resulting in great loss of active nutritional components, dark color, and generation of various harmful aromatic hydrocarbons, etc., which affect the quality of camellia oil.

[0003] Moreover, at present, the industry uses a drag-chain flat dryer or a multi-layer steaming and frying pan for drying. The equipment is indirectly heated, with uneven temperature and unable to achieve automatic control.

[0004] In summary, the conventional camellia seed oil extraction process has problems such as low economic benefits, or affecting the oil quality and destroying the nutritional components of camellia oil in the processing of camellia seeds, and the drying equipment cannot achieve automatic temperature control, which cannot meet the development direction of new quality productivity for promoting high-quality camellia oil on a small and medium scale. Summary of the Invention

[0005] In view of this, the present invention provides a method for shelling, steaming and oil extraction of camellia seeds to solve the problems of low economic benefits and low oil quality existing in the existing processes.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for shelling, steaming and oil extraction of camellia seeds includes the following steps:

[0008] Step 1: Centrifugal shelling of camellia seeds: Use a centrifugal shelling machine to shell camellia seeds to obtain tea seed kernels and shells;

[0009] Step 2: Ripening of tea seed kernels: Put the tea seed kernels into a steamer for softening;

[0010] Step 3: Flattening of tea seed kernels: Use a roller-type crushing and flattening machine to press the softened tea seed kernels into thin slices;

[0011] Step 4: Drying: Put the thin slices of tea seed kernels into a pneumatic dryer for drying;

[0012] Step 5: Oil extraction: Put the dried tea seed kernels into a screw oil press for oil extraction to obtain camellia oil.

[0013] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a method for shelling, steaming and oil pressing of camellia seeds. Since centrifugal shelling of camellia seeds is adopted in the first step, the shells that do not contain oil and are likely to cause the oil color to darken and produce burnt paste are separated, greatly increasing the production capacity of subsequent equipment, and at the same time improving the quality of the oil such as color. Moreover, while increasing the production capacity, the energy required for subsequent steam and air flow heating is reduced, further improving the production efficiency and equipment stability. The introduction of camellia seed kernel ripening retains the original flavor of the oil and increases the active substances in the oil, reducing broken powders so that crushing and drying can more effectively meet the requirements of their respective processes. In addition, this oil pressing process requires less equipment investment than the conventional pressing process, and can obtain a camellia oil process route with higher quality. The process is simple and reasonable and can achieve automatic control.

[0014] Further, the steaming temperature in step two does not exceed 110 degrees Celsius, which can prevent the modification of substances such as starch polysaccharides in camellia kernels. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0016] Figure 1 It is a process flow schematic diagram of a method for shelling, steaming and oil pressing of camellia seeds provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] 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 only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] The embodiments of the present invention disclose a method for shelling, steaming and oil pressing of camellia seeds, including the following steps:

[0019] Step 1: Centrifugal shelling of camellia seeds: Use a centrifugal shelling machine to shell camellia seeds to obtain camellia seed kernels and shells;

[0020] Step 2: Ripening of camellia seed kernels: Put the camellia seed kernels into a steamer for softening;

[0021] Step 3: Flattening of camellia seed kernels: Use a roller-type crushing and flattening machine to press the softened camellia seed kernels into thin slices;

[0022] Step 4: Drying: Place the tea seed kernel slices into an airflow dryer for drying;

[0023] Step 5: Oil extraction: Place the dried tea seed kernels into a screw oil press to extract the oil to obtain camellia oil.

[0024] The specific process of the above steps is as follows:

[0025] Firstly, the centrifugal force of the centrifugal sheller rubs and impacts the camellia seeds to break the camellia seed shells, and the clean camellia seed kernels and shells are separated by cyclone separation, that is, in the first step, 35%-45% of the shells without oil are separated out, which reduces the amount of subsequent processing, indirectly improves the processing capacity of subsequent equipment, avoids the wear of the camellia seed hard shell on the oil press chamber, reduces the possibility of sudden jamming of the oil press, and improves production efficiency; secondly, the camellia seed kernel particles are large and direct crushing is easy to cause a large amount of powder, and direct drying is unevenly heated. Steaming can soften the camellia seed kernel and destroy the cell wall of the camellia seed kernel, reduce the pressure of the press chamber, and is conducive to low-temperature oil output of the oil press, maintaining the flavor and characteristics of the camellia seed crude oil. Therefore, steaming the material to ripen the cell wall in the oil is a key process section to improve the production stability of subsequent equipment; then, the steamed camellia seed kernel is passed through The crushing rollers (single or double pairs of rollers) are evenly fed through the feeder on the crusher to further crush and flatten the camellia kernels to between 0.5 and 1 mm to meet the needs of subsequent airflow drying; then, a temperature-controlled airflow (such as electric heating, thermal oil heating, and natural gas hot air) is used, and the temperature, air pressure and air volume of the airflow and the mesh chain speed of the airflow dryer are controlled, so that the camellia kernel slices are semi-suspended and tumbled in the dryer and heated by the hot air, so that the heating is uniform and the temperature is controllable, and the discharge temperature is between 70 and 130 degrees Celsius according to the oil output requirements, the moisture is controllable, and the equipment avoids uneven heating and uneven time causing uneven materials, which is conducive to the stable constant temperature pressing of the subsequent oil press, and avoids the fluctuation of the feed temperature, humidity and other indicators in the subsequent oil pressing process affecting the production stability and efficiency; finally, the dried tea seed kernels are pressed to obtain camellia oil.

[0026] The process of the present invention uses centrifugal shelling of camellia seeds in the first step, so the shells that do not contain oil and easily cause the oil color to darken and become burnt are separated, which greatly increases the production capacity of subsequent equipment and improves the color and other qualities of the oil. Moreover, while the production capacity is increased, the energy required for subsequent water vapor and airflow heating is reduced, further improving the production efficiency and equipment stability. The introduction of tea seed kernel ripening retains the crude oil flavor of the oil and increases the active substances in the oil, reduces the crushed powder, and enables the crushing and drying to more effectively meet the needs of each section. In addition, the oil pressing process requires less equipment investment than the conventional pressing process, and can obtain a higher quality camellia oil process route, which is simple and reasonable and can achieve automatic control.

[0027] This process can improve economic efficiency and the quality of oil products, meeting the development direction of promoting the new productive forces of high-quality camellia oil on a small and medium scale.

[0028] In this specification, the various 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 devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for extracting oil from camellia seeds by shelling, steaming and pressing, characterized in that: The steps include: Step 1: Centrifugal shelling of camellia seeds: Use a centrifugal shelling machine to shell the camellia seeds to obtain tea seed kernels and shells; Step 2: Ripening tea seed kernels: Put the tea seed kernels into a steamer to soften; Step 3: Flattening tea seed kernels: Use a stick-type crushing and flattening machine to press the softened tea seed kernels into thin slices; Step 4: Drying: Place the tea seed kernel slices into an airflow dryer for drying; Step 5: Oil extraction: Place the dried tea seed kernels into a screw oil press to extract the oil to obtain camellia oil.

2. The method for extracting oil from camellia seeds by shelling and steaming according to claim 1, characterized in that: The steaming temperature in step 2 does not exceed 110 degrees Celsius.

3. The method for extracting oil from camellia seeds by shelling, steaming and pressing according to claim 1, characterized in that: The thickness of the tea seed kernel slices in step 3 is 0.5-1 mm.

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