Peanut kernel red skin removing system and method

Abstract

The invention belongs to the technical field of food processing, and relates to a peanut kernel red skin removing system and method. The removing system comprises a crusher, a winnowing pipeline, an air blower, a first induced draft fan and a dust removal system, and a discharging opening of the crusher is connected with the inlet end of the winnowing pipeline; the side wall of the winnowing pipeline is provided with an air inlet and a winnowing outlet which are arranged up and down, and the air inlet and the winnowing outlet are formed in the two sides of the winnowing pipeline respectively; the dust removal system is connected with the winnowing outlet through a pipeline; the air blower is arranged at the air inlet and used for supplying air into the winnowing pipeline. The first induced draft fan is connected to the tail end of the dust removal system and used for extracting airflow from the winnowing pipeline. An air inlet pipe is obliquely arranged at an air inlet of the winnowing pipeline, and a winnowing outlet pipe is arranged at a winnowing outlet. By means of the peanut kernel red skin removing system, red skin chippings generated after peanut kernels are broken can be separated from peanut kernels, the separated red skin chippings are rapidly discharged through the dust removal system, the influence of red skin on the quality of squeezed grease is reduced, and therefore the quality of the grease is guaranteed.

Description

Technical Field

[0001] The invention relates to a peanut red skin removal system and method, belonging to the technical field of food processing. Background Art

[0002] Peanuts are an important oilseed crop, playing a key role in edible oil production. Their structure primarily consists of the seed coat (often called the red coat), cotyledons, and embryo. During transportation and storage, peanuts undergo a series of complex changes due to their own vital activities and the influence of the external environment. Some of these changes can affect the quality of the oil, particularly heat and mildew, which are most likely to cause changes and spoilage in the oil, leading to changes in the fatty acid composition and affecting the stability of the oil during later storage. This is specifically reflected in the following aspects: First, under suitable temperature and humidity conditions, mold can easily grow and multiply on the surface of peanuts, known as the red skin, and produce aflatoxin. Aflatoxin is a strong carcinogen. If peanuts contaminated with aflatoxin are directly used to extract oil without treatment, the aflatoxin content in the oil will exceed the standard. This not only affects the quality of the oil but also poses a potential threat to consumer health.

[0003] Secondly, the harvesting, processing, and transportation of peanuts require equipment like conveyor belts and loaders. The rubber products used in these devices contain large amounts of plasticizers (phthalates). Plasticizers are commonly used as plasticizers to increase the flexibility, strength, and durability of plastics, rubber, and food packaging. When peanuts come into contact with these plasticizer-containing rubber products, a large amount of plasticizer adheres to the peanut coating, negatively affecting the quality of the oil.

[0004] In addition, peanuts themselves are active, and the red skin contains a large amount of enzymes such as lipoxygenase and lipase. These enzymes may be activated during the crushing or processing of peanuts, catalyzing the hydrolysis (generating free fatty acids) or oxidation of oils, resulting in an increase in the acid value of the oil.

[0005] Removing peanut skins can reduce the impact of enzymes, moisture, microorganisms, and other factors, and can also reduce the content of plastic particles before pressing, indirectly improving the stability of oils. Therefore, removing peanut skins plays an important role in controlling indicators such as aflatoxin, acid value, and plasticizers.

[0006] However, the red skin usually adheres to the peanuts, which makes it difficult to remove the red skin. Existing methods for removing the red skin of peanuts include wet removal process, dry removal process and enzymatic removal process, but these process methods generally have complex operation, low removal efficiency, and affect the subsequent oil extraction rate of peanuts and the quality of the oil. For example, the invention patent with application number 201911133714.9 discloses a method for removing the red skin of peanuts and removing aflatoxin. The application utilizes a wet removal process. Although this method can remove the red skin before squeezing, it requires the peanuts to be immersed in a mixed solution for 1 hour. The soaking time is long, which will not only reduce the overall production efficiency, but also the soaking process may cause the peanuts to absorb too much water, change their properties, and affect the subsequent oil extraction rate and the quality of the oil.

[0007] To this end, the present invention provides a peanut red skin removal system and method, the purpose of which is to remove the peanut red skin. Summary of the Invention

[0008] The purpose of the present invention 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 the present invention is as follows: a peanut red skin removal system, comprising a crusher, and also comprising an air separation pipe, a blower, a first induced draft fan and a dust removal system, 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 up and down, and 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 blower is arranged at the air inlet for supplying air into the air separation pipe; the first induced draft fan is connected to the end of the dust removal system for extracting air from the air separation pipe.

[0010] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: when the first induced draft fan and the blower are activated, the blower supplies air into the air separation duct, and the first induced draft fan provides the driving force for the airflow. A spiral airflow is formed in the air separation duct, flowing from the air inlet to the air separation outlet. Red skin debris with a lower specific gravity enters the dust removal system from the air separation outlet with the rising airflow, while the peanut kernels with a higher specific gravity continue to be transported downward along the air separation duct under the action of gravity. Therefore, the peanut red skin removal system of the present invention can separate the red skin debris generated after the peanuts are crushed from the peanut kernels. After separation, the red skin debris is quickly discharged through the dust removal system, reducing the impact of surface attachments on the quality of the oil after pressing, thereby ensuring the quality of the oil.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the crusher includes a crushing and separation unit, which includes a crushing chamber, wherein a No. 1 crushing roller and a No. 2 crushing roller are provided in the crushing chamber, and a screen plate is provided at the lower end of the crushing chamber. Air ducts are provided inside the No. 1 crushing roller and the No. 2 crushing roller, and a plurality of jet holes are provided on the air duct. High-pressure cold air is injected into the air duct through the No. 1 cold air duct and then ejected from the jet holes to cool and blow away the peanuts and red skins during crushing. An air duct is provided under the sieve plate, and a plurality of jet nozzles are provided on the air duct. High-pressure cold air is introduced into the air duct through the No. 2 cold air duct. The No. 1 cold air duct and the No. 2 cold air duct are both provided in the cold air input duct, and a cold air intelligent adjustment unit is provided in the cold air input duct.

[0013] The purpose of adopting the above further scheme is to use the cold air duct to spray high-pressure cold air to the crushing roller and screen plate, effectively reduce the temperature of the crushing chamber, reduce the precipitation of peanut oil and adhesion to the red skin, and instantly blow away the red skin through airflow to avoid secondary extrusion and adhesion, thereby significantly improving the red skin separation effect.

[0014] Furthermore, the crushing and separation unit also includes a feed pipe, which is fixedly connected to the upper end of the crushing chamber, and the No. 1 crushing roller and the No. 2 crushing roller are both rotatably connected to the inner wall of the crushing chamber. The No. 1 crushing roller and the No. 2 crushing roller are driven by a driving assembly, and the driving assembly includes a large gear and a small gear. The No. 1 crushing roller is fixedly connected to the large gear, and the No. 2 crushing roller is fixedly connected to the small gear. The large gear and the small gear are meshed, and the large gear is driven by a crushing motor. The screen plate is tilted in the crushing chamber, and an opening for material discharge is provided at the lower end of the screen plate, and the opening is connected to one end of a material elevator, and the other end of the material elevator is connected to the upper end of the crushing chamber.

[0015] Furthermore, the crusher also includes a cooling and separation unit, which includes the cold air input duct, and the cold air input duct is provided with a peel separation component and a cooling and screening component, and the peel separation component and the cooling and screening component respectively include the No. 1 cold air duct and the No. 2 cold air duct, and the No. 1 cold air duct and the No. 2 cold air duct are fixedly connected in the cold air input duct, and the No. 1 cold air duct is above the No. 2 cold air duct, and the No. 1 cold air duct is connected to the air duct through a rotary sealing joint, and the No. 2 cold air duct is fixedly connected to the air guide pipe, and the air guide pipe is fixedly connected to the inner wall of the crushing chamber.

[0016] Furthermore, the cold air intelligent regulating unit includes a No. 1 gas collecting pipe, a gas transmission pipeline, a No. 1 push rod, a No. 2 gas collecting pipe and a No. 2 push rod, the No. 1 gas collecting pipe is fixedly connected to the inner wall of the crushing chamber, the No. 1 push rod is slidably connected in the No. 1 gas collecting pipe, the upper end of the No. 1 push rod is fixedly connected to the lower end surface of the sieve plate, the gas transmission pipeline is connected to the bottom of the No. 1 gas collecting pipe, the distal end of the gas transmission pipeline is fixedly connected to the upper end of the No. 2 gas collecting pipe, the lower end of the No. 2 gas collecting pipe is provided with an exhaust port, the No. 2 push rod is slidably connected in the No. 2 gas collecting pipe, the upper end of the No. 2 push rod is fixedly connected to a rack, the rack is meshed with an adjusting gear, and the adjusting gear is rotatably connected to the outer wall of the cold air input pipe; A circular ring is rotatably connected in the cold air input duct, teeth are fixedly connected to the outer periphery of the circular ring, the regulating gear is meshed with the circular ring through the teeth, and a semicircular valve plate is fixedly connected in the circular ring.

[0017] The purpose of adopting the above further solution is to automatically trigger the cold air intelligent adjustment unit when the screen plate is blocked, and reduce the crushing roller air volume and increase the screen plate cooling air volume through mechanical coordination, so as to clear the blockage and optimize energy consumption, thereby achieving dynamic matching of air volume and working conditions.

[0018] Furthermore, the crusher further comprises a material discharge adjustment unit, the material discharge adjustment unit comprising a sliding rod, the lower end of the sliding rod being slidably connected to the crushing chamber, the upper end of the sliding rod being fixedly connected to the lower end surface of the screen plate, the sliding rod being fixedly connected to a limit plate, the sliding rod being nested with a support spring, the support spring being located below the limit plate, and a sleeve being provided on the outside of the support spring, the limit plate and the sliding rod; The upper end surface of the sieve plate is fixedly connected with a push rod, the push rod is hinged to the circular valve plate, and the circular valve plate is rotatably connected to the feed pipe.

[0019] Furthermore, an air inlet pipe is obliquely provided at the air inlet of the air separation duct, and an air separation outlet pipe is provided at the air separation outlet, and 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 1.2 to 2 times the diameter of the air separation pipe; The blower is installed on the air inlet pipe, and a filter is provided between the blower and the air inlet pipe, and the filter is used to evenly blow the high-pressure gas into the air separation pipe, so that the high-pressure gas evenly penetrates the material layer; The dust removal system includes a first cyclone separator, a vibrating separation screen, and a first dust collector. The inlet of the first cyclone separator is connected to the air separation outlet pipe. The air outlet above the first cyclone separator is connected to the first dust collector through a pipeline. The discharge port below the first cyclone separator is connected to the vibrating separation screen. The first induced draft fan is provided at the outlet end of the first dust collector. The outlet end of the air separation pipeline is connected to a flaking machine for flaking the peeled peanut kernels; The feeding end of the conveyor is respectively connected to the discharging port of the flaking machine and the qualified product outlet of the vibrating separation screen.

[0020] The purpose of adopting the above further solution is to set the inclination angle α of the air inlet pipe to 15°~35, so that the blown air flow and the main air flow in the air separation pipe have an incident angle, thereby reducing the air flow collision loss.

[0021] The filter ensures a more even distribution of high-pressure gas as it enters the air separation duct. This uniform airflow ensures consistent force across all parts of the material layer, preventing areas of excessive or insufficient airflow. Excessive airflow can blow out some peanut kernels, causing waste, while excessively weak airflow can't effectively separate the peanut skin debris. This uniform airflow penetrates the material layer, allowing for more precise separation based on the weight difference between the peanut skin debris and the peanut kernels, improving the separation efficiency and subsequently enhancing the quality of the oil extracted.

[0022] The first cyclone separator can perform preliminary separation on the mixed gas discharged from the air separation outlet, and use centrifugal force to separate most of the larger particulate matter such as red skin debris, and enter the vibrating separation screen through the discharge port below for further processing. The vibrating separation screen can separate peanut kernel debris with qualified indicators, peanut kernel debris with unqualified indicators and red skin debris. The gas discharged from the upper outlet of the first cyclone separator may still contain some fine dust and other impurities. The first dust collector can purify these gases again, effectively remove the impurities therein, and ensure that the discharged gas meets environmental protection requirements.

[0023] After separating the peanut kernels from the skinned peanuts, the peeled kernels are directly conveyed to the flaking mill for flaking, achieving a continuous peanut processing process. Flaking increases the surface area of ​​the peanut kernels, facilitating more complete oil extraction during the subsequent pressing process, thereby increasing oil yield. Furthermore, the continuous production process reduces the need for intermediate material transfer and storage, minimizing the risk of contamination, further ensuring the quality of the final pressed oil, and improving production efficiency and costs.

[0024] The conveyor uniformly transports the peanut flakes processed by the flaking machine and the peanut kernel crumbs that meet the requirements screened by the vibration separation screen.

[0025] Furthermore, 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 in sequence. The second cyclone separator is connected to the cylindrical screen and the material distribution scraper through pipes respectively, and the second induced draft fan is connected to the air outlet above the second cyclone separator; the cylindrical screen and the material distribution scraper are both provided with hot air inlets for introducing hot air for preheating the raw materials.

[0026] The purpose of adopting the above-mentioned further scheme is that the cylindrical screen can perform preliminary screening of the raw materials to remove larger impurities such as stones and branches, thereby ensuring the purity of the raw materials entering the subsequent equipment and reducing wear on the equipment. The material distribution scraper can evenly distribute the raw materials to the crusher, ensuring that the crusher can work stably and efficiently. The second cyclone separator and the second induced draft fan can collect and process the dust generated by the cylindrical screen and the material distribution scraper, preventing the dust from spreading into the surrounding environment and improving the working environment at the production site. The introduction of hot air to preheat the raw materials can adjust the moisture content of the raw materials. Raw materials with appropriate moisture content can help to effectively remove the peanut red skin, improve the efficiency of the processing equipment, and reduce the energy consumption of the equipment. At the same time, the preheating treatment can also kill microorganisms to a certain extent, reduce the impact of microorganisms on the quality of subsequent squeezed oil, and further ensure the quality of the oil. In addition, the physical properties of the preheated raw materials are more stable during the subsequent processing, which is conducive to improving the stability of the entire production process and the consistency of product quality.

[0027] Furthermore, it also includes a cold cake system, which includes a cold cake machine, a third cyclone separator, a second dust collector and a cooling fan connected in series through pipelines, and the air outlet of the cooling fan is connected to the hot air inlet through a pipeline.

[0028] The purpose of adopting this further solution is to cool the pressed peanut cakes using a cooling system. This cooling machine can quickly reduce the temperature of the peanut cakes, facilitating subsequent storage and transportation. The third cyclone separator and second dust collector collect and process dust generated during the cooling process, preventing dust pollution. A cooling fan transports hot air to the hot air inlet of the cylindrical screen and the material distribution scraper, thus recycling heat energy.

[0029] The present invention also provides a method for removing red skin from peanuts. The method utilizes the system for removing red skin from peanuts, and the steps are as follows: S1. Raw material pretreatment: The cylindrical screen in the feeding system is started to introduce the peanut raw materials to be processed into the system. After preliminary screening by the cylindrical screen, the raw materials are distributed and conveyed to the crusher under the action of the material distribution scraper. Hot air inlets are provided on both the cylindrical screen and the material distribution scraper. The air containing waste heat generated by the cold cake system is introduced into the hot air inlet to preheat the raw materials. S2. Raw material crushing: After preheating and preliminary screening, the raw materials enter the crusher, which uses the internal crushing components to crush the peanuts into particles, loosening the connection between the peanut skin and the peanut kernel; S3. Air separation: The crushed material enters the air separation pipe from the crusher's discharge port. The blower is started to blow air into the air separation pipe. Due to the inclined setting of the air inlet pipe, the blown air flow forms an incident angle with the main air flow in the air separation pipe, forming a spiral airflow from the air inlet to the air separation outlet in the air separation pipe. The peanut kernels with low specific gravity will enter the dust removal system from the air separation outlet with the rising air flow, while the peanut kernels with high specific gravity will continue to be transported downward along the air separation pipe under the action of gravity. S4, Dust Removal: The mixed gas containing red cloth debris entering the dust removal system first enters the first cyclone separator, where the red cloth debris is separated by centrifugal force. The red cloth debris then enters the vibrating separation screen through the discharge port below the first cyclone separator for further processing. The gas discharged from the upper outlet of the first cyclone separator enters the first dust collector for further purification. S5, flaking: After the peeled peanut kernels have been separated from the red skin, they enter the flaking machine from the outlet of the air separation pipe, where they are flaked. S6. Conveying: The conveyor uniformly transports the peanut flakes processed by the flaking machine and the qualified debris screened by the vibrating separation screen.

[0030] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The raw materials are pre-treated by the cylindrical screen and material separation scraper in the feeding system, removing impurities and introducing preheated air through the hot air inlet to adjust the moisture content of the raw materials, thus facilitating subsequent processing. A crusher breaks the preheated peanuts into granules, loosening the connection between the peanut skin and the kernel, paving the way for subsequent air separation. During the air separation process, air is introduced through an inclined air inlet pipe, forming a spiral airflow that combines with the main airflow in the air separation duct, effectively separating the peanut skin debris from the kernel. A dust removal system separates and purifies the mixed air containing peanut skin debris through multiple stages, ensuring that the exhaust gas meets environmental standards. Finally, the peeled peanut kernels are flaked and conveyed to provide high-quality raw material for the subsequent pressing process. The entire system not only improves peanut skin separation efficiency and oil quality, but also achieves a continuous and automated production process, reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] in: Figure 1 This is a structural diagram of a peanut red skin removal system according to embodiment 1 of the present invention; Figure 2 This is a structural diagram of the peanut red skin removal system of embodiment 2 of the present invention. Figure 3 It is a structural schematic diagram of the crusher in the present invention; Figure 4 Schematic diagram of the structure inside the crushing chamber of the present invention; Figure 5 for Figure 4 A in the middle is an enlarged schematic diagram; Figure 6 for Figure 4 The enlarged schematic diagram of point B in the middle; Figure 7 Schematic diagram of the structure of the drive assembly in the present invention; Figure 8 This is a structural diagram of the cooling air intelligent adjustment unit of the present invention; Figure 9 for Figure 8 The enlarged schematic diagram of point C in the middle; Figure 10 Schematic diagram of the structure of the cooling and separation unit in the present invention; Figure 11 for Figure 10 The enlarged schematic diagram of point D in the middle; Figure 12 Schematic diagram of the structure of the No. 1 gas collecting pipe, gas transmission pipeline and No. 1 push rod in the present invention; Figure 13 for Figure 12 Enlarged schematic diagram at point E in the middle.

[0033] In the picture: 100. Crusher; 1. Crushing and separation unit; 11. Crushing chamber; 12. Feed pipe; 13. Crushing motor; 14. Drive assembly; 141. Large gear; 142. Small gear; 15. Crushing roller No. 1; 16. Crushing roller No. 2; 17. Screen plate; 18. Material elevator; 2. Cooling and separation unit; 21. Cold air input pipe; 22. Peel separation assembly; 221. Cold air duct No. 1; 222. Airway; 223. Jet hole; 23. Cooling and screening assembly; 2 31. No. 2 cold air duct; 232. Air guide pipe; 233. Air nozzle; 3. Cold air intelligent adjustment unit; 31. No. 1 gas collecting pipe; 32. Gas transmission pipe; 33. No. 1 push rod; 34. No. 2 gas collecting pipe; 35. Rack; 36. Adjustment gear; 37. Semicircular valve plate; 38. Ring; 39. Teeth; 310. No. 2 push rod; 4. Blanking adjustment unit; 41. Push rod; 42. Circular valve plate; 43. Sleeve; 44. Sliding rod; 45. Support spring; 46. Limit plate; 200, air separation duct; 201, air inlet duct; 202, air separation outlet duct; 300, blower; 401, first cyclone separator; 402, vibrating separation screen; 403, first dust collector; 404, first induced draft fan; 500, flaking mill; 600, conveyor; 701, cylindrical screen; 702, material separation scraper; 703, second cyclone separator; 704, second induced draft fan; 800, hot air inlet; 901, cooling cake machine; 902, third cyclone separator; 903, second dust collector; 904, cooling fan. DETAILED DESCRIPTION

[0034] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Example 1: like Figure 1As shown, a peanut red skin removal system includes a crusher 100, an air separation pipe 200, a first induced draft fan 404 and a dust removal system. The crusher 100 is used to crush peanuts with red skins. 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 up and down, the air inlet is located below the air separation outlet and there is a height difference between the two, and the air inlet and the air separation outlet are respectively arranged on both sides of the air separation pipe 200; the dust removal system is connected to the air separation outlet through a pipe; the blower 300 is arranged at the air inlet for supplying air into the air separation pipe 200; the first induced draft fan 404 is connected to the end of the dust removal system for extracting air from the air separation pipe 200.

[0036] When the first induced draft fan 404 and the blower 300 are activated, the blower 300 delivers air into the air separation duct 200, with the first induced draft fan 404 providing the driving force for the airflow. A spiral airflow forms within the air separation duct 200, flowing from the air inlet to the air separation outlet. Red skin debris with a lower specific gravity enters the dust removal system from the air separation outlet along the rising airflow, while the heavier peanut kernels continue to be transported downward along the air separation duct 200 under the action of gravity. The peanut red skin removal system of the present invention can separate the red skin debris produced after the peanuts are crushed from the peanut kernels. After separation, the red skin debris is quickly discharged through the dust removal system, reducing the impact of the red skin on the quality of the oil after pressing, thereby ensuring the quality of the oil. The function of the first induced draft fan 404 is to generate suction to promote airflow and achieve air separation. More specifically, the first induced draft fan 404 can generate negative pressure, or suction, within the air separation duct 200. When the first induced draft fan 404 is working, air will be drawn from the rear of the system, so that the external air will be sucked into the air separation duct 200 from the air inlet, forming an air flow flowing from the air inlet to the air separation outlet. Then, after the peanuts and red clothing fragments enter the air separation duct 200, the red clothing fragments with lighter specific gravity will be driven by the air flow and enter the dust removal system through the air separation outlet, while the peanuts with heavier specific gravity will continue to fall.

[0037] In this embodiment, an air inlet pipe 201 is provided at an angle at the air inlet of the air separation duct 200, and an air separation outlet pipe 202 is provided at the air separation outlet. The inclination angle α of the air inlet pipe 201 ranges from 15° to 35°, which allows the incoming airflow to form an incident angle with the main airflow in the air separation duct 200, thereby reducing airflow counterflow losses. The vertical spacing between the air inlet and the air separation outlet is 1.2 to 2 times the diameter of the air separation duct 200.

[0038] The blower 300 is mounted on the air inlet duct 201, with a filter positioned between them. This filter evenly blows high-pressure gas into the air separation duct 200, ensuring uniform penetration of the material layer. This uniform airflow ensures consistent airflow across all parts of the material layer, preventing areas of excessive or insufficient airflow. Excessive airflow can dislodge some peanut kernels, resulting in waste; while excessively weak airflow cannot effectively separate the peanut kernels from the skins. Uniform airflow through the material layer allows for more precise separation based on the weight difference between the peanut kernels and the skins.

[0039] The dust removal system consists of a first cyclone separator 401, a vibrating separation screen 402, and a first dust collector 403. The inlet of the first cyclone separator 401 is connected to the air separation outlet pipe 202 via a pipe. Its upper air outlet is also connected to the first dust collector 403 via a pipe, while its lower discharge port is connected to the vibrating separation screen 402. A first induced draft fan 404 is located at the outlet of the first dust collector 403.

[0040] The first cyclone separator 401 is responsible for the initial separation of the mixed gas discharged from the air separation outlet. It uses centrifugal force to separate most of the larger particles such as peanut kernel debris. These particles are then fed through the discharge port below to the vibrating separation screen 402 for further processing. The vibrating separation screen 402 further separates peanut kernel debris that meets the required specifications from those that do not, as well as peanut kernel debris and peanut kernel debris that does not meet the required specifications.

[0041] The gas discharged from the upper outlet of the first cyclone separator 401 may still contain some impurities such as fine dust. The first dust collector 403 further purifies this gas to remove impurities and ensure that the discharged gas meets environmental protection requirements. In addition, the first induced draft fan 404 provides power for the entire dust removal system, ensuring that the gas from the air separation outlet can pass smoothly through various devices in the dust removal system.

[0042] The peanut peel removal system also includes a flaking mill 500, connected to the outlet of the air separation duct 200. This mill flaks the peeled peanut kernels. After separating the peeled peanut kernels from the peeled peanut kernels, the peeled peanut kernels are directly conveyed to the flaking mill 500 for flaking, achieving a continuous peanut processing process.

[0043] The peanut peel removal system also includes a conveyor 600, the feed end of which is connected to the discharge port of the flaking mill 500 and the qualified product outlet of the vibrating separation screen 402. The conveyor 600 transports the peanut flakes processed by the flaking mill 500 and the qualified peanut kernel debris screened by the vibrating separation screen 402.

[0044] like Figure 3 - Figure 13As shown, in this embodiment, the crusher 100 includes a crushing and separation unit 1, which includes a crushing chamber 11. A No. 1 crushing roller 15 and a No. 2 crushing roller 16 are provided in the crushing chamber 11. A sieve plate 17 is provided at the lower end of the crushing chamber 11. An air duct 222 is opened inside the No. 1 crushing roller 15 and the No. 2 crushing roller 16. A plurality of jet holes 223 are opened on the air duct 222. High-pressure cold air is injected into the air duct 222 through the No. 1 cold air duct 221 and then ejected from the jet holes 223 to cool and blow away the peanuts and red skin during crushing. An air guide pipe 232 is provided below the sieve plate 17. A plurality of jet nozzles 233 are provided on the air guide pipe 232. High-pressure cold air is introduced into the air guide pipe 232 through the No. 2 cold air duct 231. The No. 1 cold air duct 221 and the No. 2 cold air duct 231 are both arranged in the cold air input duct 21, and the cold air input duct 21 is provided with a cold air intelligent adjustment unit 3. The crushing and separation unit 1 also includes a feed pipe 12, which is fixedly connected to the upper end of the crushing chamber 11. The No. 1 crushing roller 15 and the No. 2 crushing roller 16 are both rotatably connected to the inner wall of the crushing chamber 11. The No. 1 crushing roller 15 and the No. 2 crushing roller 16 are driven by a drive assembly 14. The drive assembly 14 includes a large gear 141 and a small gear 142. The No. 1 crushing roller 15 is fixedly connected to the large gear 141, and the No. 2 crushing roller 16 is fixedly connected to the small gear 142. The large gear 141 and the small gear 142 are meshed. The large gear 141 is driven by the crushing motor 13. The screen plate 17 is tilted and arranged in the crushing chamber 11. The lower end of the screen plate 17 is provided with an opening for material discharge, and the opening is fixedly connected One end of the material hoist 18 and the other end of the material hoist 18 are connected to the upper end of the crushing chamber 11; the crushing motor 13 drives the drive assembly 14 to work, and the large gear 141 drives the small gear 142 to rotate, so that the No. 1 crushing roller 15 and the No. 2 crushing roller 16 rotate to crush the peanuts in the feed pipe 12. It should be noted that since the number of teeth 39 of the large gear 141 and the small gear 142 are inconsistent, the rotation speeds of the No. 1 crushing roller 15 and the No. 2 crushing roller 16 are different, forming a differential crushing effect. The different rotation speeds will cause the material to be subjected to the dual effects of shear force and extrusion force in the roller gap, thereby improving the crushing efficiency. At the same time, the differential can prevent the material from evenly accumulating on the roller surface, reducing the risk of blockage. At the same time, the crushed peanuts will fall onto the screen plate 17 and be screened by the screen plate 17 (due to the operation of the crushing motor 13 and the vibration of the entire device, a screening effect can be formed, and the screen plate 17 is set at an angle, which can make the large-particle peanuts move in a directional manner). The larger-particle peanuts enter the material elevator 18 and are then transported back to the crushing chamber 11 for further crushing (the material elevator 18 is a prior art and will not be described in detail here).

[0045] The crusher 100 also includes a cooling and separating unit 2, which includes a cold air input duct 21. The cold air input duct 21 is provided with a peel separation component 22 and a cooling and screening component 23. The peel separation component 22 and the cooling and screening component 23 respectively include a No. 1 cold air duct 221 and a No. 2 cold air duct 231. The No. 1 cold air duct 221 and the No. 2 cold air duct 231 are fixedly connected to the cold air input duct 21. The No. 1 cold air duct 221 is above the No. 2 cold air duct 231. The No. 1 cold air duct 221 and the No. 2 cold air duct 231 divide the cold air input duct 21 into two. The No. 1 cold air duct 221 is connected to the air duct 222 through a rotating sealing joint. The No. 2 cold air duct 231 is fixedly connected to the air guide pipe 232. Then, the air guide pipe 232 is fixedly connected to the inner wall of the crushing chamber 11; high-pressure cold air enters from the cold air input pipe 21, and is then diverted into the No. 1 cold air pipe 221, and then ejected from the jet hole 223 through the air duct 222, wherein the cold air can reduce the temperature of the No. 1 crushing roller 15 and the No. 2 crushing roller 16, and at the same time reduce the temperature in the crushing chamber 11, thereby improving the separation effect of the peanut crumbs and the red skin during crushing (the crushing process generates significant heat, causing the peanut crumbs to release oil, and the red skin becomes soft and sticky due to the heat, causing the two to stick together), and at the same time, the red skin adhering to the side walls of the crushing teeth of the No. 1 crushing roller 15 and the No. 2 crushing roller 16 can be blown away to prevent the red skin from sticking to the peanut crumbs again due to the extrusion force during crushing.

[0046] It can be understood that in the above process, although some red skins have separated from the peanut crumbs, they are still stuck together, so that when the No. 1 crushing roller 15 and the No. 2 crushing roller 16 cooperate in shearing, the red skins are squeezed on the surface of the peanut crumbs again, and the subsequent air separation cannot separate them. Therefore, the cooling gas ejected at this time can blow away the red skins and peanut crumbs that are stuck to each other in the first time of crushing, preventing them from being squeezed tighter again and improving the subsequent red skin removal effect.

[0047] At the same time, part of the cooling gas enters the air duct 232 from the No. 2 cold air duct 231, and is then ejected from the air nozzle 233 to the bottom of the sieve plate 17, which can cool the peanut crumbs on the sieve plate 17. Because the peanuts will be subjected to friction heat when they are crushed, the accumulation makes it impossible for the peanuts to dissipate heat, so cooling gas is needed to cool them down, so that the peanut crumbs and red skins are cooled and become crispy, which is conducive to subsequent air separation.

[0048] The cold air intelligent regulating unit 3 includes a No. 1 gas collecting pipe 31, a gas transmission pipe 32, a No. 1 push rod 33, a No. 2 gas collecting pipe 34 and a No. 2 push rod 310. The No. 1 gas collecting pipe 31 is fixedly connected to the inner wall of the crushing chamber 11. The No. 1 gas collecting pipe 31 includes a No. 1 push rod 33, which is slidably connected to the No. 1 gas collecting pipe 31. The upper end of the No. 1 push rod 33 is fixedly connected to the lower end of the sieve plate 17. The gas transmission pipe 32 is connected to the bottom of the No. 1 gas collecting pipe 31, and the distal end of the gas transmission pipe 32 is fixedly connected to the No. 2 gas collecting pipe 34. The upper end of the No. 2 air collecting pipe 34 is provided with an exhaust port at the lower end. The No. 2 push rod 310 is slidably connected to the No. 2 air collecting pipe 34. The upper end of the No. 2 push rod 310 is fixedly connected to the rack 35, and the rack 35 is engaged with the adjusting gear 36. The adjusting gear 36 is rotatably connected to the outer wall of the cold air input pipe 21; a circular ring 38 is rotatably connected to the cold air input pipe 21, and teeth 39 are fixedly connected to the outer periphery of the circular ring 38. The adjusting gear 36 is engaged with the circular ring 38 through the teeth 39, and a semicircular valve plate 37 is fixedly connected to the circular ring 38.

[0049] In the initial state, such as Figure 9 As shown, the semicircular valve plate 37 blocks half of the No. 1 cold air duct 221 and the No. 2 cold air duct 231 respectively. When the peanut crushed particles on the sieve plate 17 are blocked and accumulated too much, the sieve plate 17 moves downward under the pressure of the peanut crushed particles. At this time, the sieve plate 17 drives the No. 1 push rod 33 to slide downward in the No. 1 gas collecting pipe 31, squeezing the gas from the gas transmission pipe 32 into the upper chamber of the No. 2 gas collecting pipe 34. Then, the No. 2 push rod 310 slides downward, driving the rack 35 downward, and the rack 35 drives the adjustment gear 36 to rotate clockwise (refer to Figure 9 ), the adjusting gear 36 drives the ring 38 to rotate counterclockwise, and at the same time drives the semicircular valve plate 37 to rotate counterclockwise. When the semicircular valve plate 37 rotates counterclockwise, the air volume of the No. 1 cold air duct 221 decreases, and the air volume of the No. 2 cold air duct 231 increases. This is because when the sieve plate 17 is blocked, the amount of peanut crushed material blocked on the sieve plate 17 is large, requiring more cooling gas for cooling. At the same time, the amount of peanut crushed material blocked on the sieve plate 17 also increases. The sieve plate 17 is close to the air nozzle 233. At this time, the air volume of the air nozzle 233 increases, which can blow the peanut crushed material blocked on the sieve plate 17 upward, and cooperate with the vibration of the device to improve the screening effect and clear the blockage. It should also be noted that when the sieve plate 17 is blocked, the discharge amount of the feed pipe 12 is reduced. At this time, the cooling amount required for the crushing chamber 11, the No. 1 crushing roller 15 and the No. 2 crushing roller 16 is reduced, so the air volume of the No. 1 cold air duct 221 can be reduced.

[0050] According to the above scheme, it can be clearly seen that the descending distance of the sieve plate 17 is determined by the degree of blockage of the sieve plate 17, thereby controlling the amount of gas input from the gas pipeline 32 into the No. 2 gas collecting pipe 34, and then controlling the up and down lifting distance of the rack 35, and finally controlling the deflection angle of the semicircular valve plate 37, adjusting the air volume of the No. 1 cold air duct 221 and the No. 2 cold air duct 231 to match the current working scene, and thus having the function of dynamic adjustment.

[0051] The crusher 100 also includes a feeding adjustment unit 4, which includes a sliding rod 44. The lower end of the sliding rod 44 is slidingly connected to the crushing chamber 11, and the upper end of the sliding rod 44 is fixedly connected to the lower end surface of the screen plate 17. A limiting disk 46 is fixedly connected to the sliding rod 44, and a support spring 45 is nested on the sliding rod 44. The support spring 45 is located below the limiting disk 46, and a sleeve 43 is provided on the outside of the support spring 45, the limiting disk 46 and the sliding rod 44; the upper end surface of the screen plate 17 is fixedly connected to a push rod 41, and the push rod 41 and the circular valve plate 42 are hinged, and the circular valve plate 42 is rotatably connected in the feed pipe 12.

[0052] When the sieve plate 17 is blocked, the sieve plate 17 drops, the sliding rod 44 slides downward and compresses the support spring 45, and at the same time the top rod 41 connected to the upper end surface of the sieve plate 17 moves downward and pulls the circular valve plate 42 to deflect (the initial state of the circular valve plate 42 is as shown in FIG. Figure 4 As shown, the feeding area of ​​the feed pipe 12 is reduced, thereby reducing the feeding speed to match the current blockage that needs to be cleared. The more serious the blockage, the greater the amplitude of the sieve plate 17's descent, and the greater the deflection angle of the circular valve plate 42, resulting in a smaller feeding area of ​​the feed pipe 12 and slower feeding, allowing the sieve plate 17 sufficient time to clear the blockage, thus providing a function for dynamically adjusting the feeding speed.

[0053] Example 2: Different from the first embodiment, Figure 2 As shown, in this embodiment, the peanut red skin removal system also includes a feeding system, which includes a cylindrical screen 701, a material distribution scraper 702, a second cyclone separator 703 and a second induced draft fan 704. The cylindrical screen 701, the material distribution scraper 702 and the crusher 100 are connected in series in sequence. The second cyclone separator 703 is connected to the cylindrical screen 701 and the material distribution scraper 702 respectively through pipes, and 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 to remove larger impurities such as stones and branches, thereby ensuring the purity of the raw materials entering subsequent equipment and reducing wear on the equipment. The material distribution scraper 702 can evenly distribute the raw materials to the crusher 100. The second cyclone separator 703 and the second induced draft fan 704 can collect and process the dust generated by the cylindrical screen 701 and the material distribution scraper 702 to prevent the dust from spreading into the surrounding environment.

[0054] Both the cylindrical screen 701 and the material-distributing scraper 702 are provided with a hot air inlet 800 for introducing hot air to preheat the raw materials, reduce the moisture content of the raw materials, and kill some microorganisms attached to the surface of the raw materials to a certain extent.

[0055] The peanut peel removal system also includes a cooling system, which includes a cooling machine 901, a third cyclone separator 902, a second dust collector 903, and a cooling fan 904, which are connected in series via pipes. The air outlet of the cooling fan 904 is connected to the hot air inlet 800 via a pipe. The cooling system cools the pressed peanut cakes. The cooling machine 901 can quickly reduce the temperature of the peanut cakes, facilitating subsequent storage and transportation. The third cyclone separator 902 and the second dust collector 903 can collect and process the dust generated during the cooling process to prevent dust from polluting the environment. The cooling fan 904 is used to transport hot air to the hot air inlet 800 of the cylindrical screen 701 and the material distribution scraper 702, thereby realizing the recovery and utilization of heat energy.

[0056] In this embodiment, a method for removing red peanut skins using the peanut skin removal system includes the following steps: S1. Raw Material Pretreatment: The cylindrical screen 701 in the feeding system is activated, introducing the peanuts to be processed into the system. The cylindrical screen 701, through its rotation and meshing, performs a preliminary screening of the raw materials. The clean raw materials screened by the cylindrical screen 701 are evenly distributed and conveyed to the crusher 100 by the material distribution scraper 702. Both the cylindrical screen 701 and the material distribution scraper 702 are equipped with hot air inlets 800, which allow the residual heat generated by the cold cake system to enter and preheat the raw materials.

[0057] S2. Crushing of raw materials: After preliminary screening and preheating, the raw materials enter the crusher 100. The crusher 100 uses its internal crushing components to crush the peanuts into particles of appropriate sizes, loosening the connection between the peanut skin and the peanut kernel, creating favorable conditions for subsequent separation of the peanut skin.

[0058] 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 300 installed on the air inlet pipe 201 starts working and sends air into the air separation pipe 200. Since the air inlet pipe 201 is tilted, with an inclination angle α of 15° to 35°, the blown air flow and the main air flow in the air separation pipe 200 have an incident angle, which reduces the air flow collision loss. A spiral airflow is formed in the air separation pipe 200, flowing from the air inlet to the air separation outlet. The red powder with a smaller specific gravity will enter the dust removal system from the air separation outlet with the rising air flow, while the peanut kernels with a larger specific gravity will continue to be transported downward along the air separation pipe 200 under the action of gravity, thereby achieving effective separation of the red powder and the peanut kernels.

[0059] S4. Dust Removal: The mixed gas containing peanut chips and other debris entering the dust removal system first enters the first cyclone separator 401, where centrifugal force separates most of the larger particles, including the peanut chips. The gas then enters the vibrating separation screen 402 through the discharge port below. The peanut chips, qualified peanut pieces, and unqualified peanut pieces are effectively separated in the vibrating separation screen 402. The qualified peanut pieces are transported to the next process along with the peanut flakes processed by the flaking mill 500, while the peanut chips and unqualified peanut pieces are collected separately. Furthermore, the gas discharged from the upper outlet of the first cyclone separator 401 may still contain some fine dust and other impurities. These gases enter the first dust collector 403 for further purification, and the fine impurities are discharged from the bottom outlet of the first dust collector 403, ensuring that the gas discharged from the outlet of the first dust collector 403 meets environmental protection requirements.

[0060] S5. Flaking: After the shells have been separated, the peeled peanut kernels enter the flaking mill 500 from the outlet of the air separation duct 200. Flaking mill 500 flaks the peanut kernels, increasing their surface area. During the subsequent pressing process, this larger surface area facilitates more complete oil extraction, thereby increasing oil yield and boosting production efficiency.

[0061] S6. Transportation and subsequent processing: The peanut flakes processed by the flaking machine 500 and the qualified peanut pieces separated by the vibrating separation screen 402 are all flowed to the conveyor 600 for unified transportation.

[0062] The application effect data of the peanut red skin removal system of the present invention are shown in the following table:

[0063] The "Percentage of Selected Components" data shows that across different production batches, the system effectively separates a high percentage of components like red clothing, resulting in a purer raw material for subsequent pressing. For example, in No. 4, the percentage of selected components reached 64.5%.

[0064] In the data related to "Plasticizer Content in Peanuts," the average percentage reduction of plasticizers in peanuts after air separation is 20.8%. Plasticizers (phthalates) are commonly used as plasticizers to increase the flexibility, strength, and durability of plastic products such as plastics, rubber, and food packaging materials. Plasticizers in peanuts generally originate from the storage and transportation process, such as conveyor belts, loaders entering and exiting the warehouse, and other rubber products. The plasticizers in peanuts generally migrate in large quantities. Through the peanut red skin removal system of the present invention, the plasticizers in the peanut raw material can be removed along with fine impurities, thereby effectively reducing the plasticizer content in the peanuts and reducing the risk of product failure due to excessive plasticizers.

[0065] Data related to peanut acid value shows that the average acid value reduction after winnowing is 12.1%. This reduction in acid value indicates that the oil is less oxidized during the subsequent pressing process, reducing the need for additional acid-lowering processing steps, improving production efficiency, and enhancing the quality stability of the oil.

[0066] Data on aflatoxin content in peanuts shows that after winnowing, aflatoxin levels in peanuts are reduced by an average of 36.5%. Aflatoxin, a potent carcinogen, is significantly reduced, significantly improving the safety of the peanut raw material. This results in higher-quality oil that better meets food safety standards and enhances the product's market competitiveness.

[0067] Before pressing, the peanut kernels need to be crushed to increase the oil yield. During the crushing process, the peanut red skins fall off and are separated from the cotyledons and germs. The crushed and detached peanut red skins are then recovered in a cyclone separator and screened for further processing. By removing the red skins from the peanuts, aflatoxin in the raw material can be effectively reduced, improving the quality of the crude oil. The present invention can also recycle the peanut powder removed during the red skin removal process, reducing raw material waste and ensuring that the dust concentration discharged outdoors is less than 8mg / m³, meeting environmental protection requirements. The crusher 100 and the flaking mill 500 operate under slightly negative pressure conditions, preventing dust leakage and ensuring that the dust concentration in the production environment is effectively controllable.

[0068] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A peanut red skin removal system, comprising a crusher (100), characterized in that: It also includes an air separation duct (200), a blower (300), a first induced draft fan (404) and a dust removal system, wherein the discharge port of the crusher (100) is connected to the inlet end of the air separation duct (200); the side wall of the air separation duct (200) is provided with an air inlet and an air separation outlet arranged up and down, and the air inlet and the air separation outlet are respectively arranged on both sides of the air separation duct (200); the dust removal system is connected to the air separation outlet through a pipeline; the blower (300) is arranged at the air inlet, and the blower (300) is used to supply air into the air separation duct (200); the first induced draft fan (404) is connected to the end of the dust removal system and is used to extract air from the air separation duct (200).

2. The peanut red skin removal system according to claim 1, characterized in that: The crusher (100) includes a crushing and separation unit (1), the crushing and separation unit (1) includes a crushing chamber (11), a first crushing roller (15) and a second crushing roller (16) are provided in the crushing chamber (11), a screen plate (17) is provided at the lower end of the crushing chamber (11), an air duct (222) is provided inside the first crushing roller (15) and the second crushing roller (16), a plurality of air injection holes (223) are provided on the air duct (222), and air is injected into the air duct (222) through the first cold air duct (221). After the high-pressure cold air enters, it is ejected from the jet hole (223) to cool and blow away the crushed peanuts and the peanut skin. An air guide pipe (232) is provided below the sieve plate (17). A plurality of air nozzles (233) are provided on the air guide pipe (232). The air guide pipe (232) is passed through the second cold air duct (231). The first cold air duct (221) and the second cold air duct (231) are both provided in the cold air input duct (21). The cold air input duct (21) is provided with a cold air intelligent adjustment unit (3).

3. The peanut red skin removal system according to claim 2, characterized in that: The crushing and separation unit (1) further comprises a feed pipe (12), wherein the feed pipe (12) is fixedly connected to the upper end of the crushing chamber (11), the first crushing roller (15) and the second crushing roller (16) are both rotatably connected to the inner wall of the crushing chamber (11), the first crushing roller (15) and the second crushing roller (16) are driven by a drive assembly (14), wherein the drive assembly (14) comprises a large gear (141) and a small gear (142), and the first crushing roller (15) and the large gear (141) are connected to each other. 41) is fixedly connected, the second crushing roller (16) and the small gear (142) are fixedly connected, the large gear (141) and the small gear (142) are meshed, the large gear (141) is driven by the crushing motor (13), the screen plate (17) is tiltedly arranged in the crushing chamber (11), and the lower end of the screen plate (17) is provided with an opening for material discharge, the opening is connected to one end of the material hoist (18), and the other end of the material hoist (18) is connected to the upper end of the crushing chamber (11).

4. The peanut red skin removal system according to claim 2, characterized in that: The crusher (100) further includes a cooling and separating unit (2), the cooling and separating unit (2) including the cold air input duct (21), the cold air input duct (21) being provided with a peel separation component (22) and a cooling and screening component (23), the peel separation component (22) and the cooling and screening component (23) respectively including the first cold air duct (221) and the second cold air duct (231), the first cold air duct (221) and the second cold air duct (231) being fixedly connected in the cold air input duct (21), the first cold air duct (221) being above the second cold air duct (231), the first cold air duct (221) being connected to the air duct (222) via a rotary sealing joint, the second cold air duct (231) and the air guide duct (232) being fixedly connected, and the air guide duct (232) being fixedly connected to the inner wall of the crushing chamber (11).

5. The peanut red skin removal system according to claim 2, characterized in that: The cold air intelligent regulating unit (3) comprises a No. 1 gas collecting pipe (31), a gas transmission pipe (32), a No. 1 push rod (33), a No. 2 gas collecting pipe (34) and a No. 2 push rod (310), wherein the No. 1 gas collecting pipe (31) is fixedly connected to the inner wall of the crushing chamber (11), the No. 1 push rod (33) is slidably connected in the No. 1 gas collecting pipe (31), the upper end of the No. 1 push rod (33) is fixedly connected to the lower end surface of the sieve plate (17), and the gas transmission pipe (32) is connected to the No. 1 gas collecting pipe (34). The bottom of the gas collecting pipe (31), the distal end of the gas transmission pipe (32) is fixedly connected to the upper end of the No. 2 gas collecting pipe (34), the lower end of the No. 2 gas collecting pipe (34) is provided with an exhaust port, the No. 2 push rod (310) is slidably connected in the No. 2 gas collecting pipe (34), the upper end of the No. 2 push rod (310) is fixedly connected to a rack (35), the rack (35) is meshed with an adjusting gear (36), and the adjusting gear (36) is rotatably connected to the outer wall of the cold air input pipe (21); A circular ring (38) is rotatably connected inside the cold air input duct (21), and teeth (39) are fixedly connected to the periphery of the circular ring (38). The regulating gear (36) is meshed with the circular ring (38) through the teeth (39), and a semicircular valve plate (37) is fixedly connected inside the circular ring (38).

6. The peanut red skin removal system according to claim 3, characterized in that: The crusher (100) further includes a material discharge adjustment unit (4), the material discharge adjustment unit (4) including a sliding rod (44), the lower end of the sliding rod (44) being slidably connected to the crushing chamber (11), the upper end of the sliding rod (44) being fixedly connected to the lower end surface of the screen plate (17), the sliding rod (44) being fixedly connected to a limit plate (46), the sliding rod (44) being nested with a support spring (45), the support spring (45) being located below the limit plate (46), and the support spring (45), the limit plate (46) and the sliding rod (44) being provided with a sleeve (43) on the outside; The upper end surface of the sieve plate (17) is fixedly connected to a push rod (41), the push rod (41) and a circular valve plate (42) are hinged, and the circular valve plate (42) is rotatably connected in the feed pipe (12).

7. The peanut red skin removal system according to claim 1, characterized in that: An air inlet pipe (201) is provided at an angle at the air inlet of the air separation pipe (200), and an air separation outlet pipe (202) is provided at the air separation outlet. The inclination angle α of the air inlet pipe (201) is 15° to 35°; the vertical distance between the air inlet and the air separation outlet is 1.2 to 2 times the diameter of the air separation pipe (200); The blower (300) is installed on the air inlet pipe (201), and a filter is provided between the blower (300) and the air inlet pipe (201), and the filter is used to evenly blow high-pressure gas into the air separation pipe (200); The dust removal system comprises a first cyclone separator (401), a vibrating separation screen (402) and a first dust collector (403); the inlet of the first cyclone separator (401) is connected to the air separation outlet pipe (202); the air outlet above the first cyclone separator (401) is connected to the first dust collector (403) through a pipeline; the discharge port below the first cyclone separator (401) is connected to the vibrating separation screen (402); and the first induced draft fan (404) is arranged at the outlet end of the first dust collector (403); The outlet end of the air separation pipeline (200) is connected to a flaking machine (500) for flaking the peeled peanut kernels; The feed end of the conveyor (600) is respectively connected to the discharge port of the flaking machine (500) and the qualified product outlet of the vibrating separation screen (402).

8. The peanut red skin removal system according to claim 7, characterized in that: The device further comprises a feeding system, the feeding system comprising a cylindrical screen (701), a material distribution scraper (702), a second cyclone separator (703) and a second induced draft fan (704), the cylindrical screen (701), the material distribution scraper (702) and the crusher (100) being sequentially connected in series, the second cyclone separator (703) being connected to the cylindrical screen (701) and the material distribution scraper (702) via pipelines, and the second induced draft fan (704) being connected to an air outlet above the second cyclone separator (703); The cylindrical screen (701) and the material-distributing scraper (702) are both provided with a hot air inlet (800) 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 cake system, which includes a cold cake machine (901), a third cyclone separator (902), a second dust collector (903) and a cooling fan (904) connected in series via a pipeline, and an air outlet of the cooling fan (904) is connected to the hot air inlet (800) via a pipeline.

10. A method for removing red skin from peanuts, using the peanut red skin removal system according to claim 9, characterized in that: Here are the steps: S1. Raw material pretreatment: The cylindrical screen (701) in the feeding system is started to introduce the peanut raw material to be processed into the system. After preliminary screening by the cylindrical screen (701), the raw material is distributed and conveyed to the crusher (100) under the action of the material distribution scraper (702). Hot air inlets (800) are provided on both the cylindrical screen (701) and the material distribution scraper (702). Air containing waste heat generated in the cold cake system is introduced into the hot air inlet (800) to preheat the raw material. S2, raw material crushing: the raw materials after preheating and preliminary screening enter the crusher (100), and the crusher (100) crushes the peanuts into particles through the internal crushing components, so that the connection between the peanut skin and the peanut kernel becomes loose; S3, air separation: The crushed material enters the air separation pipe (200) from the discharge port of the crusher (100), and the blower (300) is started to blow air into the air separation pipe (200). Since the air inlet pipe (201) is inclined, the blown air flow and the main air flow in the air separation pipe (200) are at an incident angle, so that a spiral air flow is formed in the air separation pipe (200) from the air inlet to the air separation outlet. The peanut kernels with a small specific gravity will enter the dust removal system from the air separation outlet with the rising air flow, while the peanut kernels with a large specific gravity will continue to be transported downward along the air separation pipe (200) under the action of gravity; S4, dust removal: The mixed gas containing red clothes debris entering the dust removal system first enters the first cyclone separator (401), where the red clothes debris is separated by centrifugal force. The red clothes debris enters the vibrating separation screen (402) through the discharge port below the first cyclone separator (401) for further treatment. The gas discharged from the air outlet above the first cyclone separator (401) enters the first dust collector (403) for further purification. S5, flaking: the peeled peanut kernels after the red skin is separated enter the flaking machine (500) from the outlet end of the air separation pipe (200), and the flaking machine (500) flaks the peanut kernels; S6. Conveying: The conveyor (600) uniformly conveys the peanut flakes processed by the flaking machine (500) and the qualified debris screened by the vibrating separation screen (402).

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