High-protein sunflower seed oil preparation method
By optimizing the shell peeling and kernel shell separation process of sunflower seeds, the problem of difficulty in efficiently producing high-quality sunflower seed kernels and protein powder in the prior art is solved, and efficient and high-quality sunflower seed oil production and protein powder production are achieved.
Patent Information
- Application Number
- CN202411534176.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-02-11
AI Technical Summary
During the existing sunflower seed oil making process, it is difficult to efficiently produce high-quality sunflower seed kernels and protein powder, resulting in low quality of oil making and protein powder.
By optimizing the shell peeling and kernel shell separation process of sunflower seeds, using centrifugal shell peeling machines and multi-layer grading screens and other equipment, the effective removal of sunflower seed shells and the precise separation of sunflower kernels is achieved, thereby improving the quality of oil making and protein powder.
It has achieved efficient shelling and production of high-quality protein powders for sunflower seed kernels, and improved the quality and application value of oil production and protein powders.
Smart Images
Figure CN119410403A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of grain and oil food processing, in particular to a method for producing high-protein oil from sunflower seeds, and more particularly to a complete set of high-protein oil production processing technology for producing sunflower seed kernels (the amount of sunflower seed shells in the sunflower seed kernels is ≤0.5%) by shelling and separating sunflower seeds. Background Art
[0002] Sunflower seeds are native to southern and western North America, Peru and northern Mexico, and are now mainly distributed in Northeast, North China and Northwest China. Sunflower seeds can grow in all kinds of soil, from fertile soil to dry land, barren land and saline-alkali land; they have strong salt-alkali tolerance.
[0003] Sunflower seeds can be used for medicinal purposes, which was recorded as early as in the Compendium of Materia Medica. Sunflower seeds, also known as melon seeds, are sweet and neutral in nature. They have the effects of curing blood madness, penetrating swelling and poison, calming the mind and helping sleep, and expelling parasites and moistening the lungs; the flower disk can also nourish the lungs, resolve phlegm, and calm asthma.
[0004] Sunflower seeds are one of the five major oils in the world. The oil content of sunflower seeds is as high as 38% to 45%. The crude oil obtained is light in color and has a strong aroma of sunflower seeds. It is relatively easy to refine. The five-deoxidized finished oil can be used as salad oil. Sunflower seed oil has a reasonable fatty acid composition and is a good edible oil for lowering cholesterol and blood lipids.
[0005] The meal after oil making has high protein content and reasonable amino acid composition ratio. The protein powder is fine, white and has a pleasant aroma. It is popular both as food and as feed raw material.
[0006] Therefore, how to solve the shelling of sunflower seeds and the subsequent separation of kernels and shells is the key technology and development trend for making high-quality protein powder and high-quality oil.
[0007] The protein content of protein powder produced by the current sunflower seed oil production process is about 30% to 35%. Due to the lack of technology in shelling equipment and kernel-shell separation system, high-quality oil sunflower kernels cannot be efficiently produced, and high-quality protein powder and high-quality oil cannot be obtained. Therefore, there is an urgent need to improve the complete production process of sunflower seed oil and protein powder. Summary of the invention
[0008] In view of the problems existing in the above-mentioned prior art, the present invention provides a method for producing high-protein oil from sunflower seeds. By optimizing and improving the complete processing technology for shelling and separating sunflower seeds to produce sunflower kernels, the problem of shells in sunflower kernels is solved, and good raw materials are provided for subsequent deep processing of sunflower seeds, which will ultimately be more widely used in the feed and food industries.
[0009] In order to achieve the above object, the technical solution adopted by the present invention is as follows:
[0010] A method for producing high-protein sunflower seed oil, comprising the following steps:
[0011] S10, raw material feeding and cleaning process: use quantitative feeding equipment to evenly and stably feed the sunflower seed raw materials into the production line, and remove various impurities in the sunflower seed raw materials respectively;
[0012] S20, weighing and grading process: the sunflower seed raw materials after impurities removal are continuously weighed in the production line to control the stable production of subsequent links, and the sunflower seed raw materials are graded according to the set raw material specifications after weighing, and then sent to the corresponding silos for storage;
[0013] S30, shelling process: obtaining graded sunflower seed raw materials from the corresponding silo according to current processing parameters, and using a centrifugal shelling machine to peel the sunflower seed shells from the sunflower kernels;
[0014] S40, kernel-shell screening and separation process: the mixed material of shelled sunflower seeds and sunflower kernels is subjected to primary size screening and fine type screening in sequence, the sunflower kernels are separated from the mixed material, and the finished kernels are subjected to subsequent processing processes, wherein the amount of sunflower kernels contained in the separated sunflower shells does not exceed 1%;
[0015] S50, sunflower kernel oil production process: the finished kernels are pressed and extracted to produce crude oil and wet meal, and the crude oil is refined by degumming, alkali refining, decolorization, deodorization and dewaxing to produce qualified high-quality sunflower oil;
[0016] S60, protein grinding and packaging process: the wet meal produced by oil production is dried, ground and graded to produce high-quality protein powder with a protein content of more than 45%.
[0017] Furthermore, the specific process of step S10 includes:
[0018] S11. In the process of using the quantitative feeding equipment, inorganic impurities in the production and transportation of sunflower seed raw materials are removed, and light impurities in the sunflower seed raw materials are preliminarily cleaned;
[0019] S12. The quantitatively fed sunflower seed raw materials first enter the vibrating grading screen equipment, where they are cleaned under the dual effects of vibration and wind to remove large, small and light impurities in the sunflower seed raw materials. Then, they are passed through a permanent magnet to remove iron impurities, and finally sent to a suction specific gravity stone remover to remove stone impurities.
[0020] Specifically, the impurity content in the sunflower seed raw material after impurity removal obtained in step S12 does not exceed 0.3%, wherein a centrifugal dust collection system and a pulse dust removal system are configured in the impurity removal process to control the impurity removal environment.
[0021] Furthermore, the specific process of step S20 includes:
[0022] S21. A double-bucket continuous weigher is configured in the production line to continuously weigh the sunflower seed raw materials fed in;
[0023] S22. The sunflower seed raw materials after continuous weighing enter a multi-layer grading screen for grading. The multi-layer grading screen screens the sunflower seed raw materials in order according to the particle size of the sunflower seed raw materials in a way of large at the top and small at the bottom. The screening specifications of each layer are determined according to the current production process. The sunflower seed raw materials after each layer of screening are temporarily stored in a silo of corresponding specifications.
[0024] Specifically, the silos in step S22 are configured as a first-level silo, a second-level silo and a third-level silo in sequence according to the large, medium and small specifications of the sunflower seed raw materials.
[0025] Specifically, in step S30, the operating parameters of the centrifugal sheller and the operating parameters of the equipment in the subsequent kernel and shell screening and separation process are adaptively adjusted according to the capacity of the sunflower seed raw materials temporarily stored in the silos of different specifications, wherein:
[0026] When the capacity of sunflower seed raw materials in silos of different specifications is less than 50% and greater than 10%, the silo of the largest specification is selected to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to adapt to the operating parameters of the processing of the largest specification sunflower seed raw materials, and the raw materials of the current silo are continuously processed without being affected by other silo capacity conditions until the capacity of the current silo raw materials is less than 10%, and then the silo capacity condition is judged;
[0027] When the capacity of the sunflower seed raw materials in a silo exceeds 75%, it is determined whether the capacity of the silo currently used to obtain the sunflower seed raw materials is less than 60%. If so, the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications. Otherwise, the raw materials in the current silo are continuously processed until the capacity of the raw materials in the current silo is less than 60%, and then the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications.
[0028] When the capacity of the sunflower seed raw materials in the current silo is less than 10%, determine whether the capacity of the sunflower seed raw materials in other silos is less than 40%. If so, continue to process the raw materials in the current silo until it is empty, and then switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications. Otherwise, directly switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications.
[0029] Furthermore, the specific process of step S40 includes:
[0030] S41, using a flat separation screen to preliminarily screen the mixture of shelled sunflower seeds and sunflower kernels, wherein the flat separation screen is configured as a multi-layer structure, and gradually separates the materials into corresponding sizes according to the sizes of the materials, to obtain mixtures of different sizes differentiated by volume, wherein the largest volume is the mixture of large shells and whole seeds, the smallest volume is the mixture of crushed sunflower kernels and crushed small shells, and the intermediate volume is the mixture of sunflower kernels and crushed shells;
[0031] S42. The mixed materials of different sizes obtained by the primary screening are respectively sent to the kernel-shell separation system for fine screening. For the mixed materials of large shells and whole seeds, a suction gravity sorter is used to separate the large shells from the whole seeds during movement, and the large shells are sent to the shell warehouse, and the whole seeds are sent to the seed warehouse for temporary storage. For the mixed materials of sunflower kernels and crushed shells and the mixed materials of crushed sunflower kernels and crushed small shells, an air separation separator is used to separate the kernels and shells, and the shells are sent to the shell warehouse, and the kernels are further sent to the photoelectric color sorter for further screening of sunflower kernels and small sunflower seeds. The sunflower kernels selected by the color are sent to the kernel warehouse as finished kernels, and the small sunflower seeds selected by the color are sent to the seed warehouse for temporary storage, wherein the amount of sunflower kernels contained in the sunflower shells in the shell warehouse does not exceed 1%.
[0032] Furthermore, the step S40 further includes:
[0033] S43, return peeling process: returning the sunflower seeds temporarily stored in the seed bank to the shelling process for shelling.
[0034] Compared with the prior art, the present invention has the following beneficial effects:
[0035] (1) The present invention designs and improves the complete set processing technology of sunflower seeds. First, various impurities in the raw materials of sunflower seeds are removed through the feeding process and the cleaning process, thereby improving the quality of the raw materials. Then, the raw materials of sunflower seeds are divided into several processing specifications according to the set standards through the metering process and the grading process, thereby improving the accuracy and processing efficiency of the subsequent shelling process and the screening process. The accurate output of sunflower kernels is ensured through accurate primary screening and fine screening, thereby providing reliable raw material guarantee for oil production and protein production. The present invention is ingenious in design, convenient in implementation, high in operating efficiency, and has good product quality, and is suitable for application in the complete set processing of sunflower seeds.
[0036] (2) Based on the raw material classification, the present invention cleverly designs a shelling process control process that matches different material grades, which not only effectively improves the accuracy of the shelling process for processing raw materials of corresponding material grades, thereby improving the shelling efficiency and output quality, but also minimizes the frequency of switching raw material specifications, and can ensure the smooth operation and efficient output of the entire set of process production lines.
[0037] (3) The present invention designs a synchronous peeling process, which greatly facilitates the recovery and processing of seed materials after primary screening and fine screening, can better match the materials of current specifications for shelling, further improves the process processing accuracy and efficiency, and reduces material waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 It is a schematic diagram of the process framework of an embodiment of the present invention. DETAILED DESCRIPTION
[0039] The present invention is further described below in conjunction with the accompanying drawings and examples. The embodiments of the present invention include but are not limited to the following examples.
[0040] Example
[0041] like Figure 1 As shown, the method for producing high-protein sunflower seed oil comprises the following steps:
[0042] S10, raw material feeding and cleaning process: use quantitative feeding equipment to evenly and stably feed the sunflower seed raw materials into the production line, and remove various impurities in the sunflower seed raw materials respectively.
[0043] The specific process includes:
[0044] S11. In the process of using quantitative feeding equipment, inorganic impurities in the production and transportation of sunflower seed raw materials are removed, and light impurities in the sunflower seed raw materials are preliminarily cleaned.
[0045] S12. The quantitatively fed sunflower seed raw materials first enter the vibrating grading screen equipment, where they are cleaned under the dual effects of vibration and wind to remove large, small and light impurities in the sunflower seed raw materials. Then, they are passed through a permanent magnet to remove iron impurities, and finally sent to a suction specific gravity stone remover to remove stone impurities.
[0046] The impurity content in the sunflower seed raw material after impurity removal obtained in step S12 does not exceed 0.3%, and a centrifugal dust collection system and a pulse dust removal system are configured in the impurity removal process to control the impurity removal environment.
[0047] S20, weighing and grading process: the sunflower seed raw materials after impurities are continuously weighed in the production line to control the stable production of subsequent links, and the sunflower seed raw materials are graded according to the set raw material specifications after weighing, and then sent to the corresponding silos for storage.
[0048] The specific process includes:
[0049] S21. A double-bucket continuous weigher is configured in the production line to continuously weigh the sunflower seed raw materials fed in.
[0050] S22. The sunflower seed raw materials after continuous weighing enter a multi-layer grading screen for grading. The multi-layer grading screen screens the sunflower seed raw materials in order according to the particle size of the sunflower seed raw materials in a way of large at the top and small at the bottom. The screening specifications of each layer are determined according to the current production process. The sunflower seed raw materials after each layer of screening are temporarily stored in a silo of corresponding specifications.
[0051] Specifically, the silos in step S22 are configured as a first-level silo, a second-level silo and a third-level silo in sequence according to the large, medium and small specifications of the sunflower seed raw materials.
[0052] S30, shelling process: according to the current processing parameters, the graded sunflower seed raw materials are obtained from the corresponding silo, and the sunflower seed shells are peeled off from the sunflower kernels by a centrifugal shelling machine.
[0053] Specifically, in step S30, the operating parameters of the centrifugal sheller and the operating parameters of the equipment in the subsequent kernel and shell screening and separation process are adaptively adjusted according to the capacity of the sunflower seed raw materials temporarily stored in the silos of different specifications, wherein:
[0054] When the capacity of sunflower seed raw materials in silos of different specifications is less than 50% and greater than 10%, the silo of the largest specification is selected to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to adapt to the operating parameters of the processing of the largest specification sunflower seed raw materials, and the raw materials of the current silo are continuously processed without being affected by other silo capacity conditions until the capacity of the current silo raw materials is less than 10%, and then the silo capacity condition is judged;
[0055] When the capacity of the sunflower seed raw materials in a silo exceeds 75%, it is determined whether the capacity of the silo currently used to obtain the sunflower seed raw materials is less than 60%. If so, the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications. Otherwise, the raw materials in the current silo are continuously processed until the capacity of the raw materials in the current silo is less than 60%, and then the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications.
[0056] When the capacity of the sunflower seed raw materials in the current silo is less than 10%, determine whether the capacity of the sunflower seed raw materials in other silos is less than 40%. If so, continue to process the raw materials in the current silo until it is empty, and then switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications. Otherwise, directly switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications.
[0057] S40, kernel-shell screening and separation process: the mixed material of shelled sunflower seeds and sunflower kernels is subjected to primary size screening and fine type screening in sequence, the sunflower kernels are separated from the mixed material, and the finished kernels are subjected to subsequent processing steps, wherein the amount of sunflower kernels contained in the separated sunflower shells does not exceed 1%.
[0058] The specific process includes:
[0059] S41. Use a flat separation screen to preliminarily screen the mixture of shelled sunflower seeds and sunflower kernels. The flat separation screen is configured as a multi-layer structure. The materials are gradually separated into corresponding sizes according to their sizes to obtain mixtures of different sizes differentiated by volume. The largest volume is the mixture of large shells and whole seeds, the smallest volume is the mixture of crushed sunflower kernels and crushed small shells, and the intermediate volume is the mixture of sunflower kernels and crushed shells.
[0060] S42. The mixed materials of different sizes obtained by the primary screening are respectively sent to the kernel-shell separation system for fine screening. For the mixed materials of large shells and whole seeds, a suction gravity sorter is used to separate the large shells from the whole seeds during movement, and the large shells are sent to the shell warehouse, and the whole seeds are sent to the seed warehouse for temporary storage. For the mixed materials of sunflower kernels and crushed shells and the mixed materials of crushed sunflower kernels and crushed small shells, an air separation separator is used to separate the kernels and shells, and the shells are sent to the shell warehouse, and the kernels are further sent to the photoelectric color sorter for further screening of sunflower kernels and small sunflower seeds. The sunflower kernels selected by the color are sent to the kernel warehouse as finished kernels, and the small sunflower seeds selected by the color are sent to the seed warehouse for temporary storage, wherein the amount of sunflower kernels contained in the sunflower shells in the shell warehouse does not exceed 1%.
[0061] S43, back-peeling process: returning the sunflower seeds temporarily stored in the seed bank to the shelling process for shelling. The shelled material is mixed with the output of the previous shelling process and enters the corresponding process for processing.
[0062] S50, sunflower kernel oil production process: the finished kernels are pressed and extracted to produce crude oil and wet meal. Since the crude oil cannot be eaten directly, the crude oil is then refined through degumming, alkali refining, decolorization, deodorization and dewaxing to produce qualified high-quality sunflower oil.
[0063] S60, protein grinding and packaging process: the wet meal produced by oil production is dried, ground and graded to produce high-quality protein powder with a protein content of more than 45%.
[0064] According to tests, the complete set of processes of the present invention can produce protein powder with a protein content of 50%, thereby effectively improving the application value of the product.
[0065] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any changes made by adopting the design principles of the present invention and performing non-creative work on this basis should fall within the protection scope of the present invention.
Claims
1. A method for producing high-protein oil from sunflower seeds, characterized in that: The following steps are involved: S10, raw material feeding and cleaning process: use quantitative feeding equipment to evenly and stably feed the sunflower seed raw materials into the production line, and remove various impurities in the sunflower seed raw materials respectively; S20, weighing and grading process: the sunflower seed raw materials after impurities removal are continuously weighed in the production line to control the stable production of subsequent links, and the sunflower seed raw materials are graded according to the set raw material specifications after weighing, and then sent to the corresponding silos for storage; S30, shelling process: obtaining graded sunflower seed raw materials from the corresponding silo according to current processing parameters, and using a centrifugal shelling machine to peel the sunflower seed shells from the sunflower kernels; S40, kernel-shell screening and separation process: the mixed material of shelled sunflower seeds and sunflower kernels is subjected to primary size screening and fine type screening in sequence, the sunflower kernels are separated from the mixed material, and the finished kernels are subjected to subsequent processing processes, wherein the amount of sunflower kernels contained in the separated sunflower shells does not exceed 1%; S50, sunflower kernel oil production process: the finished kernels are pressed and extracted to produce crude oil and wet meal, and the crude oil is refined by degumming, alkali refining, decolorization, deodorization and dewaxing to produce qualified high-quality sunflower oil; S60, protein grinding and packaging process: the wet meal produced by oil production is dried, ground and graded to produce high-quality protein powder with a protein content of more than 45%.
2. The method for producing high-protein oil from sunflower seeds according to claim 1, characterized in that: The specific process of step S10 includes: S11. In the process of using the quantitative feeding equipment, inorganic impurities in the production and transportation of sunflower seed raw materials are removed, and light impurities in the sunflower seed raw materials are preliminarily cleaned; S12. The quantitatively fed sunflower seed raw materials first enter the vibrating grading screen equipment, where they are cleaned under the dual effects of vibration and wind to remove large, small and light impurities in the sunflower seed raw materials. Then, they are passed through a permanent magnet to remove iron impurities, and finally sent to a suction specific gravity stone remover to remove stone impurities.
3. The method for producing high-protein oil from sunflower seeds according to claim 2, characterized in that: The impurity content in the sunflower seed raw material after impurity removal obtained in step S12 does not exceed 0.3%, wherein a centrifugal dust collection system and a pulse dust removal system are configured during the impurity removal process to control the impurity removal environment.
4. The method for producing high-protein oil from sunflower seeds according to claim 1, characterized in that: The specific process of step S20 includes: S21. A double-bucket continuous weigher is configured in the production line to continuously weigh the sunflower seed raw materials fed in; S22. The sunflower seed raw materials after continuous weighing enter a multi-layer grading screen for grading. The multi-layer grading screen screens the sunflower seed raw materials in order according to the particle size of the sunflower seed raw materials in a way of large at the top and small at the bottom. The screening specifications of each layer are determined according to the current production process. The sunflower seed raw materials after each layer of screening are temporarily stored in a silo of corresponding specifications.
5. The method for producing high-protein oil from sunflower seeds according to claim 4, characterized in that: The silos in step S22 are configured as a first-level silo, a second-level silo and a third-level silo in sequence according to the large, medium and small specifications of the sunflower seed raw materials.
6. The method for producing high-protein oil from sunflower seeds according to claim 4, characterized in that: In step S30, the operating parameters of the centrifugal sheller and the operating parameters of the equipment in the subsequent kernel and shell screening and separation process are adaptively adjusted according to the capacity of the sunflower seed raw materials temporarily stored in the silos of different specifications, wherein: When the capacity of sunflower seed raw materials in silos of different specifications is less than 50% and greater than 10%, the silo of the largest specification is selected to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to adapt to the operating parameters of the processing of the largest specification sunflower seed raw materials, and the raw materials of the current silo are continuously processed without being affected by other silo capacity conditions until the capacity of the current silo raw materials is less than 10%, and then the silo capacity condition is judged; When the capacity of the sunflower seed raw materials in a silo exceeds 75%, it is determined whether the capacity of the silo currently used to obtain the sunflower seed raw materials is less than 60%. If so, the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications. Otherwise, the raw materials in the current silo are continuously processed until the capacity of the raw materials in the current silo is less than 60%, and then the silo is switched to obtain the sunflower seed raw materials, and the centrifugal sheller is configured to be adapted to the operating parameters of the sunflower seed raw materials processing of the silo specifications. When the capacity of the sunflower seed raw materials in the current silo is less than 10%, determine whether the capacity of the sunflower seed raw materials in other silos is less than 40%. If so, continue to process the raw materials in the current silo until it is empty, and then switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications. Otherwise, directly switch to the silo with the largest raw material capacity to obtain the sunflower seed raw materials, and configure the centrifugal shelling machine with operating parameters suitable for the processing of sunflower seed raw materials of the silo specifications.
7. The method for producing high-protein oil from sunflower seeds according to any one of claims 1 to 6, characterized in that: The specific process of step S40 includes: S41, using a flat separation screen to preliminarily screen the mixture of shelled sunflower seeds and sunflower kernels, wherein the flat separation screen is configured as a multi-layer structure, and gradually separates the materials into corresponding sizes according to the sizes of the materials, to obtain mixtures of different sizes differentiated by volume, wherein the largest volume is the mixture of large shells and whole seeds, the smallest volume is the mixture of crushed sunflower kernels and crushed small shells, and the intermediate volume is the mixture of sunflower kernels and crushed shells; S42. The mixed materials of different sizes obtained by the primary screening are respectively sent to the kernel-shell separation system for fine screening. For the mixed materials of large shells and whole seeds, a suction gravity sorter is used to separate the large shells from the whole seeds during movement, and the large shells are sent to the shell warehouse, and the whole seeds are sent to the seed warehouse for temporary storage. For the mixed materials of sunflower kernels and crushed shells and the mixed materials of crushed sunflower kernels and crushed small shells, an air separation separator is used to separate the kernels and shells, and the shells are sent to the shell warehouse, and the kernels are further sent to the photoelectric color sorter for further screening of sunflower kernels and small sunflower seeds. The sunflower kernels selected by the color are sent to the kernel warehouse as finished kernels, and the small sunflower seeds selected by the color are sent to the seed warehouse for temporary storage, wherein the amount of sunflower kernels contained in the sunflower shells in the shell warehouse does not exceed 1%.
8. The method for producing high-protein oil from sunflower seeds according to claim 7, characterized in that: The step S40 further includes: S43, return peeling process: returning the sunflower seeds temporarily stored in the seed bank to the shelling process for shelling.