A peanut kernel red testa removing system

Abstract

The utility model belongs to food processing technical field relates to a peanut kernel red skin removing system, including the crusher, the winnowing pipeline, dust removal system and first induced draft fan, the discharge gate of crusher is connected with the import end of winnowing pipeline, winnowing pipeline lateral wall is equipped with the air inlet and winnowing export arranged up and down, air inlet and winnowing export are arranged respectively in both sides of winnowing pipeline, dust removal system is connected with winnowing export through the pipeline, first induced draft fan is connected in the tail end of dust removal system, is used as the power source of winnowing and extracts airflow in winnowing pipeline. Through the utility model, can separate the red skin scrap after peanut kernel crushing and peanut kernel, the red skin scrap separates and discharges fast through dust removal system, reduces the influence of red skin to the oil quality after pressing, thereby guarantees the quality of oil.

Description

Technical Field

[0001] This utility model relates to a peanut skin removal system, belonging to the field of food processing technology. Background Technology

[0002] Peanuts are an important oilseed crop, playing a crucial role in edible oil production. Their structure mainly consists of three parts: the seed coat (commonly known as the red skin), cotyledons, and embryo. During transportation and storage, peanut kernels undergo a series of complex changes due to their own life activities and the influence of the external environment. Some of these changes can affect the quality of the oil, especially heating and mold growth, which are most likely to lead to changes and spoilage in oil quality, thereby altering the fatty acid composition and affecting the stability of the oil during later storage. Specifically, this manifests in the following aspects:

[0003] First, under suitable temperature and humidity conditions, mold easily grows and multiplies on the surface of peanuts, specifically the red skin, producing aflatoxin. Aflatoxin is a potent carcinogen. If peanuts contaminated with aflatoxin are used directly for oil extraction without further treatment, the aflatoxin content in the oil will exceed safe limits. This not only affects the quality of the oil but also poses a potential threat to consumers' health.

[0004] Secondly, the harvesting, processing, and transportation of peanuts involve equipment such as conveyor belts and loaders. The rubber components in this equipment contain large amounts of plasticizers (phthalates). Plasticizers are commonly used as additives to increase the flexibility, strength, and durability of plastic products, including plastics, rubber, and food packaging materials. When peanuts come into contact with these plasticizer-containing rubber components, a large amount of plasticizer adheres to the skin, negatively impacting the quality of the oil.

[0005] In addition, peanuts themselves are biologically active, and the red skin contains a lot of enzymes such as lipoxidase and lipase. These enzymes may be activated during peanut crushing or processing, catalyzing the hydrolysis (generating free fatty acids) or oxidation of oils, leading to an increase in the acid value of the oil.

[0006] Removing the red skin from peanuts reduces the influencing factors such as enzymes, moisture, and microorganisms, and also lowers the content of plastic particles before pressing, indirectly improving the stability of the oil. Therefore, removing the red skin plays an important role in controlling indicators such as aflatoxin, acid value, and plasticizers.

[0007] However, the red skin usually adheres to peanut kernels, making its removal difficult. Existing methods for removing peanut red skin include wet removal, dry removal, and enzymatic removal processes. However, these methods generally suffer from problems such as complex operation, low removal efficiency, and negative impacts on the subsequent oil yield and oil quality during pressing. For example, invention patent application number 201911133714.9 discloses a method for removing aflatoxin from peanut red skins. This application utilizes a wet removal process. Although this method can remove the red skin before pressing, it requires soaking the peanut kernels in a mixed solution for one hour. This prolonged soaking time not only reduces overall production efficiency but also may cause the peanut kernels to absorb excessive water, altering their properties and affecting the subsequent oil yield and oil quality during pressing. Utility Model Content

[0008] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0009] The technical solution provided by this utility model is as follows: A peanut red skin removal system includes a crusher, an air separation pipe, a dust removal system, and a first induced draft fan. The discharge port of the crusher is connected to the inlet end of the air separation pipe. The side wall of the air separation pipe is provided with an air inlet and an air separation outlet arranged vertically. The air inlet is located below the air separation outlet and there is a height difference between the two. The air inlet and the air separation outlet are respectively arranged on both sides of the air separation pipe. The dust removal system is connected to the air separation outlet through a pipe. The first induced draft fan is connected to the dust removal system and is used as the power source for the air separation and dust removal systems to draw airflow from the air separation pipe.

[0010] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: By adding an air inlet and an air separation outlet to the air separation pipe, when the first induced draft fan is started, a spiral airflow is formed in the air separation pipe from the air inlet to the air separation outlet. The lighter red skin fragments will enter the dust removal system from the air separation outlet with the spiral airflow, while the heavier peanut kernels will continue to be conveyed downwards along the air separation pipe under the action of gravity. Therefore, through the peanut red skin removal system of this utility model, the red skin fragments generated after peanut crushing can be separated from the peanut kernels. After separation, the red skin fragments are quickly discharged through the dust removal system, reducing the impact of the adhering substances on the surface of the red skin on the quality of the pressed oil, thereby ensuring the quality of the oil.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the air inlet of the air separation pipe is inclinedly provided with an air inlet pipe, and the air separation outlet is provided with an air separation outlet pipe. The inclination angle α of the air inlet pipe is 15° to 35°. The vertical distance between the air inlet and the air separation outlet is greater than 500mm. The area of ​​the air inlet is 1 to 1.5 times the area of ​​the air separation outlet.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the inclination angle of the air inlet pipe is set to 15° to 35°, which allows the blown airflow to form an incident angle with the main airflow in the air separation pipe, reducing the energy loss caused by airflow collision. During the air separation process, after the crushed material enters the air separation pipe, sufficient distance and time are required for the separation of materials with different specific gravities under the action of airflow. If the vertical distance between the air inlet and the air separation outlet is too small, the peanut fragments may reach the air separation outlet before they have been fully separated from the red skin. The greater the height difference between the air inlet and the air separation outlet, the longer the settling time of the peanut fragments, the less peanut fragments are carried away by the red skin, and the better the air separation effect. In addition, maintaining a ratio of 1 to 1.5 times between the area of ​​the air inlet and the area of ​​the air separation outlet helps to maintain a relatively stable pressure and velocity distribution of the airflow in the pipe.

[0014] Furthermore, it also includes a blower, which is installed on the air inlet pipe, and a filter screen is provided between the blower and the air inlet pipe. The filter screen is used to blow high-pressure gas evenly into the air separation pipe, thereby allowing the high-pressure gas to penetrate the material layer evenly.

[0015] The beneficial effects of adopting the above-mentioned further solution are that the blower can deliver air into the air separation pipe, and the filter screen can make the high-pressure gas more evenly distributed when entering the air separation pipe. Uniform airflow ensures that the airflow force on all parts of the material layer is consistent, avoiding situations where the airflow is too strong or too weak in certain areas. Excessively strong airflow may blow out some peanut kernels as well, causing waste; while insufficient airflow cannot effectively separate the red skin fragments. Uniform airflow penetrating the material layer can more accurately separate the red skin fragments and peanut kernels based on their weight difference, improving the separation effect and enhancing the quality of the subsequently pressed oil.

[0016] Furthermore, the dust removal system includes a first cyclone separator, a vibrating separator screen, a first dust collector, and a first induced draft fan. The inlet of the first cyclone separator is connected to the air separation outlet through a pipe, the air outlet above the first cyclone separator is connected to the first dust collector through a pipe, the discharge port below the first cyclone separator is connected to the vibrating separator screen, and the first induced draft fan is located at the outlet end of the first dust collector.

[0017] The beneficial effects of adopting the above-mentioned further scheme are that the first cyclone separator can perform preliminary separation of the mixed gas discharged from the air classifier outlet, using centrifugal force to separate most of the larger particles such as red skin fragments. These particles then enter the vibrating separator screen for further processing through the discharge port below. The vibrating separator screen can separate qualified peanut kernel fragments, unqualified peanut kernel fragments, and red skin fragments. The gas discharged from the outlet above the first cyclone separator may still contain some fine dust and other impurities. The first dust collector can further purify these gases, effectively removing the impurities and ensuring that the discharged gas meets environmental protection requirements. The first induced draft fan provides power to the entire dust removal system, ensuring that the gas can smoothly pass through each piece of equipment, achieving efficient gas treatment and impurity separation.

[0018] Furthermore, it also includes a flaking mill, which is connected to the outlet end of the air separation pipe for flaking peeled peanut kernels.

[0019] The beneficial effects of adopting the above-mentioned further solution are that, after separating the red skin fragments from the peanut kernels, the peeled peanut kernels are directly conveyed to the flaking mill for flaking, realizing a continuous peanut processing flow. Flaking increases the surface area of ​​the peanut kernels, which facilitates more complete oil extraction during subsequent pressing, increasing the oil yield. Simultaneously, the continuous production process reduces material transfer and storage in intermediate stages, lowers the risk of material contamination, further ensures the quality of the final pressed oil, improves production efficiency, and reduces production costs.

[0020] Furthermore, it also includes a conveyor, the feed end of which is connected to the discharge port of the rolling mill and the qualified product outlet of the vibrating separator screen.

[0021] The beneficial effect of adopting the above-mentioned further scheme is that the conveyor transports the peanut flakes processed by the rolling mill and the qualified peanut kernel fragments screened by the vibrating separator in a unified manner.

[0022] Furthermore, it also includes a feeding system, which includes a cylindrical screen, a distribution scraper, a second cyclone separator, and a second induced draft fan. The cylindrical screen, the distribution scraper, and the crusher are connected in series. The second cyclone separator is connected to the cylindrical screen and the distribution scraper through pipes, and the second induced draft fan is connected to the air outlet above the second cyclone separator.

[0023] The beneficial effects of adopting the above-mentioned further solutions are that the cylindrical screen can perform preliminary screening of raw materials, removing larger impurities such as stones and branches, ensuring the purity of raw materials entering subsequent equipment and reducing wear on the equipment. The distribution scraper can evenly distribute the raw materials into the crusher, ensuring that the crusher can operate stably and efficiently. The dust removal device composed of the second cyclone separator and the second induced draft fan can collect and treat the dust generated by the cylindrical screen and the distribution scraper, preventing dust from spreading into the surrounding environment and improving the working environment at the production site.

[0024] Furthermore, both the cylindrical screen and the material distribution scraper are equipped with hot air inlets for introducing hot air to preheat the raw materials.

[0025] The beneficial effects of adopting the above-mentioned further solution are that preheating the raw materials with hot air can adjust their moisture content. Raw materials with suitable moisture content help to effectively remove the peanut skin and also improve the efficiency of processing equipment, reducing energy consumption. Simultaneously, preheating can kill microorganisms to a certain extent, reducing their impact on the quality of subsequently pressed oil and further ensuring oil quality. Furthermore, preheated raw materials contribute to improved stability of the entire production process and consistency of product quality during subsequent processing.

[0026] Furthermore, it also includes a cold pancake system, which comprises a cold pancake machine, a third cyclone separator, a second dust collector, and a cooling fan connected in series via pipes, with the air outlet of the cooling fan connected to the hot air inlet via a pipe.

[0027] The beneficial effects of adopting the above-mentioned further solution are that the cold cake system cools the pressed cake, and the cold cake machine can quickly reduce the temperature of the cake, facilitating subsequent storage and transportation. The dust removal device, consisting of a third cyclone separator and a second dust collector, can collect and treat the dust generated during the cold cake process, avoiding dust pollution to the environment. The hot air is transported to the hot air inlet of the cylindrical screen and the material distribution scraper by a cooling fan, realizing the recovery and utilization of heat energy. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the peanut skin removal system according to Embodiment 1 of this utility model;

[0030] Figure 2This is a schematic diagram of the peanut skin removal system according to Embodiment 2 of this utility model.

[0031] In the diagram, 100 is the crusher; 200 is the air separation pipe; 201 is the air inlet pipe; 202 is the air separation outlet pipe; 300 is the blower; 401 is the first cyclone separator; 402 is the vibrating separator screen; 403 is the first dust collector; 404 is the first induced draft fan; 500 is the rolling mill; 600 is the conveyor; 701 is the cylindrical screen; 702 is the material distribution scraper; 703 is the second cyclone separator; 704 is the second induced draft fan; 800 is the hot air inlet; 901 is the cold cake machine; 902 is the third cyclone separator; 903 is the second dust collector; and 904 is the cooling fan. Detailed Implementation

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0033] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0034] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0035] Example 1:

[0036] like Figure 1 As shown, a peanut red skin removal system includes a crusher 100, an air separation pipe 200, a dust removal system, and a first induced draft fan 404. The crusher 100 is used to crush peanuts with red skin, and the discharge port of the crusher 100 is connected to the inlet end of the air separation pipe 200. The side wall of the air separation pipe 200 is provided with an air inlet and an air separation outlet arranged vertically, and the air inlet and air separation outlet are respectively located on both sides of the air separation pipe 200, with the air inlet located below the air separation outlet. The dust removal system is connected to the air separation outlet through a pipe, and the first induced draft fan 404 is connected to the end of the dust removal system to serve as the power source for air separation, drawing airflow from the air separation pipe.

[0037] The function of the induced draft fan is to generate negative pressure, or suction. When the induced draft fan is working, it draws air from the rear of the entire system, creating negative pressure within the air separation duct 200. This draws outside air into the air separation duct 200 through the air inlet, creating an upward airflow. When peanut kernels and red skin fragments enter the air separation duct 200, the lighter red skin fragments are carried upwards by the airflow and enter the dust removal system through the air separation outlet, while the heavier peanut kernels fall directly down. The function of the first induced draft fan 404 is to generate suction, promote airflow, and achieve air separation.

[0038] In addition, in this embodiment, the air inlet of the air separation pipe 200 is inclinedly provided with an air inlet pipe 201, and the air separation outlet is provided with an air separation outlet pipe 202. The inclination angle of the air inlet pipe 201 is 15° to 35°, which can make the blown airflow form an incident angle with the main airflow in the air separation pipe 200, reducing airflow collision loss. The vertical distance between the air inlet and the air separation outlet is greater than 500mm. During the air separation process, when the crushed material enters the air separation pipe 200, it needs sufficient distance and time to achieve the separation of materials with different specific gravities under the action of airflow. If the vertical distance between the air inlet and the air separation outlet is too small, the peanut fragments may reach the air separation outlet before they have been fully separated from the red skin. The greater the height difference between the air inlet and the air separation outlet, the longer the settling time of the peanut fragments, the less peanut fragments are carried away by the red skin, and the better the air separation effect. In addition, maintaining a ratio of 1 to 1.5 times between the air inlet area and the air separator outlet area helps to maintain a relatively stable pressure and velocity distribution of the airflow within the duct.

[0039] The rejection system also includes the blower device 300. The blower is installed on the air inlet pipe 201 and is used to supply air into the air separation pipe 200. A filter screen is provided between the blower and the air inlet pipe 201. The filter screen is used to evenly blow high-pressure gas into the air separation pipe 200, thereby ensuring that the high-pressure gas penetrates the material layer evenly. The filter screen allows for a more uniform distribution of high-pressure gas when entering the air separation pipe 200. Uniform airflow ensures that the airflow force on all parts of the material layer is consistent, avoiding situations where the airflow is too strong or too weak in some areas. An excessively strong airflow may blow out some peanut kernels as well, causing waste; while an excessively weak airflow cannot effectively separate the red skin fragments. Uniform airflow penetrating the material layer can more accurately separate the red skin fragments and peanut kernels based on their weight difference, improving the separation effect of red skin fragments and peanut kernels and enhancing the quality of the subsequently pressed oil.

[0040] The dust removal system includes a first cyclone separator 401, a vibrating screen 402, a first dust collector 403, and a first induced draft fan 404. The inlet of the first cyclone separator 401 is connected to the air separation outlet through a pipe. The air outlet above the first cyclone separator 401 is connected to the first dust collector 403 through a pipe. The discharge port below the first cyclone separator 401 is connected to the vibrating screen 402. The first induced draft fan 404 is located at the outlet end of the first dust collector 403. The first cyclone separator 401 performs preliminary separation of the mixed gas discharged from the air classifier outlet, using centrifugal force to separate most of the larger particles, such as red skin fragments. These particles then enter the vibrating screen 402 for further processing through the discharge port below. The vibrating screen 402 separates qualified peanut kernel fragments from unqualified peanut kernel fragments and red skin fragments. The gas discharged from the outlet above the first cyclone separator 401 may still contain some fine dust and other impurities. The first dust collector 403 further purifies this gas, effectively removing impurities and ensuring that the discharged gas meets environmental protection requirements. The first induced draft fan 404 provides power to the entire dust removal system, ensuring that the gas can smoothly pass through each piece of equipment, achieving efficient gas treatment and impurity separation.

[0041] The peanut skin removal system also includes a flaking mill 500, which is connected to the outlet of the air separation pipe 200 and is used to flake the peeled peanut kernels. After separating the red skin fragments from the peanut kernels, the peeled peanut kernels are directly conveyed to the flaking mill 500 for flaking, realizing a continuous peanut processing flow. Flaking increases the surface area of ​​the peanut kernels, which is beneficial for more complete oil extraction during subsequent pressing, thus increasing the oil yield. At the same time, the continuous production process reduces material transfer and storage in intermediate links, reduces the risk of material contamination, further ensures the quality of the final pressed oil, improves production efficiency, and reduces production costs.

[0042] The peanut skin removal system also includes a conveyor 600, the feed end of which is connected to the discharge port of the rolling mill 500 and the qualified product outlet of the vibrating separator 402. The conveyor 600 transports the peanut flakes processed by the rolling mill 500 and the qualified peanut kernel fragments screened out by the vibrating separator 402 in a unified manner.

[0043] Example 2:

[0044] Unlike Example 1, such as Figure 2As shown, in this embodiment, the peanut skin removal system further includes a feeding system, which comprises a cylindrical screen 701, a distribution scraper 702, a second cyclone separator 703, and a second induced draft fan 704. The cylindrical screen 701, the distribution scraper 702, and the crusher 100 are connected in series. The second cyclone separator 703 is connected to the cylindrical screen 701 and the distribution scraper 702 via pipes. The second induced draft fan 704 is connected to the air outlet above the second cyclone separator 703. The cylindrical screen 701 can perform preliminary screening of the raw materials, removing larger impurities such as stones and branches, ensuring the purity of the raw materials entering subsequent equipment and reducing wear on the equipment. The distribution scraper 702 can evenly distribute the raw materials into the crusher 100, ensuring that the crusher 100 can operate stably and efficiently. The dust removal device, consisting of the second cyclone separator 703 and the second induced draft fan 704, can collect and treat the dust generated by the cylindrical screen 701 and the material distribution scraper 702, preventing the dust from spreading to the surrounding environment.

[0045] Both the cylindrical screen 701 and the material distribution scraper 702 are equipped with hot air inlets 800 for introducing hot air to preheat the raw materials. Preheating the raw materials with hot air can adjust their moisture content. In subsequent processing, the preheated raw materials help improve the stability of the entire production process and the consistency of product quality.

[0046] The peanut skin removal system also includes a cooling system, which comprises a cooling machine 901, a third cyclone separator 902, a second dust collector 903, and a cooling fan 904 connected in series via pipes. The outlet of the cooling fan 904 is connected to the hot air inlet 800 via a pipe. The cooling system cools the pressed peanut cake. The cooling machine 901 can quickly reduce the temperature of the cake, facilitating subsequent storage and transportation. The dust removal device, consisting of the third cyclone separator 902 and the second dust collector 903, can collect and treat the dust generated during the cooling process, preventing dust pollution. The cooling fan 904 delivers hot air to the hot air inlet 800 of the cylindrical screen 701 and the distribution scraper 702, realizing the recovery and utilization of heat energy.

[0047] The peanut red skin removal system in this embodiment constructs a process that starts from raw material pretreatment, goes through red skin separation and refining, and finally realizes waste heat utilization. The specific workflow is as follows:

[0048] S1. Raw Material Pretreatment: The cylindrical screen 701 in the feeding system is activated, introducing the peanut raw material to be processed into the system. The cylindrical screen 701 performs preliminary screening of the raw material through its own rotation and the action of the screen holes. The clean raw material after screening by the cylindrical screen 701 is evenly distributed and conveyed to each crusher 100 under the action of the distribution scraper 702. Both the cylindrical screen 701 and the distribution scraper 702 are equipped with hot air inlets 800. At this time, air containing residual heat generated in the cold cake system is introduced to preheat the raw material.

[0049] S2. Raw material crushing: The preheated raw material enters the crusher 100. The crusher 100 crushes the peanuts into appropriately sized particles through its internal crushing components, making the connection between the red skin and the peanut kernel loose, creating favorable conditions for subsequent red skin separation.

[0050] S3. Air Separation: The crushed material enters the air separation pipe 200 from the discharge port of the crusher 100. At this time, the blower installed on the air inlet pipe 201 starts to work, sending air into the air separation pipe 200. Since the air inlet pipe 201 is set at an inclination angle of 15° to 35°, the blown airflow and the main airflow in the negative pressure air separation pipe 200 form an incident angle, reducing airflow collision loss. Under the synergistic action of the blower and the first induced draft fan 404, a spiral airflow is formed in the air separation pipe 200 from the air inlet to the air separation outlet. This causes the red skin fragments with a smaller specific gravity to enter the dust removal system from the air separation outlet with the rising airflow, while the peanut kernels with a larger specific gravity continue to be conveyed downward along the negative pressure air separation pipe 200 under the action of gravity, thereby achieving effective separation of red skin fragments and peanut kernels.

[0051] S4. Dust Removal: The mixed gas containing red clothing debris and other particles entering the dust removal system first enters the first cyclone separator 401. Centrifugal force separates most of the larger particles, such as red clothing debris, and the gas then enters the vibrating screen 402 for further processing through the discharge port below. The gas discharged from the outlet above the first cyclone separator 401 may still contain some fine dust and other impurities. This gas enters the first dust collector 403 for further purification to remove impurities and ensure that the discharged gas meets environmental protection requirements.

[0052] S5. Rolling Process: After the red skin is separated, the peeled peanut kernels enter the rolling mill 500 through the outlet of the negative pressure air separation pipe 200. The rolling mill 500 rolls the peanut kernels to increase their surface area. In the subsequent pressing process, a larger surface area facilitates more complete oil extraction, thereby increasing the oil yield and improving production efficiency.

[0053] S6. Conveying and Subsequent Processing: The feed end of the conveyor 600 is connected to the discharge port of the rolling mill 500 and the qualified product outlet of the vibrating separator 402. The conveyor 600 transports the peanut chips processed by the rolling mill 500 and the qualified debris screened by the vibrating separator 402 in a unified manner.

[0054] The application effect data of the peanut red skin removal system of this utility model is shown in the table below:

[0055]

[0056] The data on "percentage of selected components" shows that, across different production batches, the system can effectively separate a high proportion of components such as the red skin, resulting in purer raw materials for subsequent pressing. For example, in batch 4, the percentage of selected components reached 64.5%.

[0057] In the data related to "plasticizer content in peanuts", the average percentage reduction in plasticizers in peanuts after air separation is 20.8%. Through the peanut red skin removal system of this invention, plasticizers in peanut raw materials can be removed along with the red skin, thereby effectively reducing the plasticizer content in peanuts and minimizing the risk of product non-compliance due to excessive plasticizer levels.

[0058] Data related to "peanut acid value" shows that the average percentage reduction in peanut acid value after wind separation is 12.1%. This reduces the need for additional processing steps to lower acid value, improves production efficiency, and also enhances the quality stability of the oil.

[0059] Data on "aflatoxin content in peanuts" shows that the aflatoxin content in peanuts decreased by an average of 36.5% after air separation. This significant reduction in aflatoxin content significantly improves the safety of peanut raw materials, resulting in higher quality oil that better meets food safety standards and enhances the product's market competitiveness.

[0060] Before pressing, peanut kernels need to be crushed to increase oil yield. During the crushing process, the red skin of the peanuts falls off. The crushed and detached red skin is separated from the cotyledons and germ, and then further processed through a cyclone separator and screening. Peanuts with the red skin removed can effectively reduce aflatoxin in the raw material and improve the quality of crude oil. This invention can also recover the peanut powder brought out during the removal of the red skin, reducing raw material waste and ensuring that the dust concentration discharged outdoors is <8mg / m³, meeting environmental protection requirements. The crusher 100 and the rolling mill 500 operate under a slight negative pressure condition, with no dust leakage, ensuring that the dust concentration in the production environment is effectively controlled.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A peanut red skin removal system, characterized in that, The system includes a crusher, an air separation pipe, a dust removal system, and a first induced draft fan. The discharge port of the crusher is connected to the inlet end of the air separation pipe. The side wall of the air separation pipe is provided with an air inlet and an air separation outlet arranged vertically, and the air inlet and the air separation outlet are respectively located on both sides of the air separation pipe. The dust removal system is connected to the air separation outlet through a pipe, and the first induced draft fan is connected to the end of the dust removal system for drawing airflow from the air separation pipe.

2. The peanut red skin removal system according to claim 1, characterized in that, The air inlet of the air separation pipe is inclined and the outlet of the air separation pipe is provided with an air separation outlet pipe. The inclination angle α of the air inlet pipe is 15° to 35°. The vertical distance between the air inlet and the air separation outlet is greater than 500mm. The area of ​​the air inlet is 1 to 1.5 times the area of ​​the air separation outlet.

3. The peanut red skin removal system according to claim 2, characterized in that, It also includes a blower, which is installed on the air inlet pipe, and a filter screen is provided between the blower and the air inlet pipe for blowing high-pressure gas evenly into the air separation pipe.

4. The peanut red skin removal system according to any one of claims 1-3, characterized in that, The dust removal system includes a first cyclone separator, a vibrating screen, and a first dust collector. The inlet of the first cyclone separator is connected to the air separation outlet through a pipe. The air outlet above the first cyclone separator is connected to the first dust collector through a pipe. The discharge port below the first cyclone separator is connected to the vibrating screen. The first induced draft fan is located at the outlet end of the first dust collector.

5. The peanut red skin removal system according to claim 4, characterized in that, It also includes a flaking mill, which is connected to the outlet end of the air separation pipe and is used to flaking peeled peanut kernels.

6. The peanut red skin removal system according to claim 5, characterized in that, It also includes a conveyor, the feed end of which is connected to the discharge port of the rolling mill and the qualified product outlet of the vibrating separator screen.

7. The peanut red skin removal system according to claim 1, characterized in that, It also includes a feeding system, which includes a cylindrical screen, a material distribution scraper, a second cyclone separator, and a second induced draft fan. The cylindrical screen, the material distribution scraper, and the crusher are connected in series. The second cyclone separator is connected to the cylindrical screen and the material distribution scraper through pipes. The second induced draft fan is connected to the air outlet above the second cyclone separator.

8. The peanut red skin removal system according to claim 7, characterized in that, Both the cylindrical screen and the material distribution scraper are equipped with hot air inlets for introducing hot air to preheat the raw materials.

9. The peanut red skin removal system according to claim 8, characterized in that, It also includes a cold pancake system, which comprises a cold pancake machine, a third cyclone separator, a second dust collector, and a cooling fan connected in series via pipes. The outlet of the cooling fan is connected to the hot air inlet via a pipe.

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