Grease extraction device and rubber tree seed oil extraction device

Abstract

The utility model discloses a grease extraction device and a rubber tree seed oil extraction device, which comprise composite drying equipment, shelling equipment and oil pressing equipment, materials to be pressed sequentially pass through the composite drying device, the shelling device and the oil pressing device. The composite drying equipment comprises a microwave drying unit and a constant-temperature negative-pressure drying unit which are communicated with each other, and a tempering channel is arranged between the microwave drying unit and the constant-temperature negative-pressure drying unit; the shelling equipment comprises a roller classifying screen and a rubbing and grinding crusher; the system further comprises raw material removing equipment, cleaning equipment and spectrum color sorting equipment. The utility model discloses a preparation device special for rubber tree seed oil, which reduces impurities in squeezed rubber tree seed oil by removing, cleaning and shelling mildewed seeds. And through composite drying, moisture in the seeds is reduced, and active ingredients in the seeds can be reserved to the maximum extent, so that the quality of the rubber tree seed oil is improved.

Description

Technical Field

[0001] The utility model relates to grease extraction equipment, in particular to a grease extraction device and a rubber tree seed oil extraction device. Background Art

[0002] At present, many seeds contain oil, and the oil can be extracted for consumption or medicinal purposes through different processes. In oil extraction, since the moisture content of fresh seeds is relatively high, they need to be dried before extraction; and there are highly active enzymes in the seeds, which need to be quickly inactivated to prevent heating and mold; and the active ingredients in the seeds need to be retained. In particular, rubber tree seeds are tropical stubborn seeds. The moisture content of fresh seeds is as high as 33%, and there is no dormancy period. Once the temperature is right, they begin to germinate within 7 days, and the storage life under natural conditions is very short. The seed shell is hard and dense, and the shell is wrapped in a layer of wax. The inner layer and the surface of the seed coat are densely covered with fine short hairs, and the water retention performance is extremely strong. Rubber tree seeds fell into the rubber forest and were picked up by people. They were infected with various microorganisms in the tropical rainforest forest, and the various enzymes in the seeds were highly active. During storage, they are very easy to heat and mold, causing the rubber tree seed raw materials to deteriorate and cannot be used for subsequent oil extraction and processing. Rubber tree seeds will lose their vitality if the moisture content is less than 10%.

[0003] Currently, many oil extraction processes usually use high-temperature drying to remove moisture from the seeds and inactivate endogenous and exogenous enzymes and bacteria. However, high-temperature drying requires a lot of energy. At the same time, the seeds may burst due to uneven internal and external pressure during this process, which is not conducive to subsequent processing. Utility Model Content

[0004] The purpose of the utility model is to provide a grease extraction device and a rubber tree seed oil extraction device in response to the above-mentioned problems, which adopts a composite drying device of microwave drying and constant temperature negative pressure drying, multi-stage pre-drying by microwaves, drying from the inside by heating, and then combined with external hot air heating and drying, and gradually releasing internal moisture by gradually reducing the internal temperature and pressure, with high drying efficiency, maximal retention of active ingredients in the seeds, and less prone to bursting.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model discloses an oil extraction device, comprising a composite drying device, a shelling device and an oil pressing device; the material to be pressed passes through the composite drying device, the shelling device and the oil pressing device in sequence; the composite drying device comprises a microwave drying unit and a constant temperature negative pressure drying unit which are connected, and a slow-release passage is arranged between the microwave drying unit and the constant temperature negative pressure drying unit; the shelling device comprises a drum grading screen and a rubbing crusher, and holes of different apertures are arranged on the drum grading screen, and the holes of different apertures correspond to different rubbing crushers respectively.

[0007] The above structure adopts a composite drying method of microwave drying and constant temperature negative pressure drying. The high-frequency microwave is used to moderately heat the inside of the seeds. When removing the water on the surface of the seeds, the internal moisture is partially removed for pre-drying. Then the pre-dried seeds are sent to a constant temperature sealed warehouse. At this time, the internal pressure of the seeds is higher than that of the outside. Hot air is sent into the sealed silo. The seeds gradually release the internal moisture by gradually reducing the internal temperature and pressure, thereby completing the seed drying and performing secondary drying. The composite drying method greatly improves the drying efficiency of the seeds. At the same time, the active ingredients in the seeds are retained to the maximum extent through multiple precise temperature controls. The setting of the drum grading screen with different apertures in the shelling equipment and the holes with different apertures corresponding to the different rubbing and crushing machines can be used to screen the seeds according to the particle size before shelling. Seeds of different particle sizes are crushed by rubbing and crushing machines with different rubbing and crushing machines, so that the seeds can be fully crushed to avoid small-size seeds that are not crushed because they are smaller than the rubbing and crushing machines or large-size seeds that are not crushed because they are larger than the rubbing and crushing machines.

[0008] Furthermore, the microwave drying unit comprises a drying channel, a conveyor belt passes through the drying channel, and at least one independently controlled microwave generator is also arranged in the drying channel.

[0009] In the above structure, the material to be dried is placed on the conveyor belt and transported forward. After entering the drying channel, the microwave generator in the channel performs microwave drying on the material to be dried. Since multiple microwave generators are provided, the material to be dried can be dried in sections to avoid reducing the moisture content from 30% to below 10% at one time, which not only consumes a lot of energy, but also may cause the seeds to burst due to uneven internal and external pressures and lose active ingredients in this process. The independent control of the microwave generator can achieve multi-stage precise temperature control.

[0010] Furthermore, the constant temperature negative pressure drying unit includes a warehouse body, a ventilation duct connected to hot air is arranged in the warehouse body, a feed port and a vacuum pumping device are arranged on the top of the warehouse body, and a discharge port and a storage area are arranged on the bottom of the warehouse body.

[0011] In the above structure, the constant temperature negative pressure drying unit dries by passing hot air, and the vacuum device on the top of the silo continuously extracts moisture from the silo to form a negative pressure inside the silo, so that the airflow in the silo flows continuously from bottom to top, maintaining ventilation and dryness inside the silo, so that the materials in the silo dry faster and are better preserved.

[0012] Furthermore, one or more combinations of a fan, a vacuum pump, and a magnetron are provided in the slow-release channel.

[0013] The above structure can quickly revive the dried material through the fan, reduce the internal thermal stress shock caused by drying, and avoid shrinkage, hardening and browning of the material surface that affect the quality of the material; it can also use vacuum revival, using a vacuum pump to extract wet steam and hot air, while reducing the moisture content, so that the moisture in the center of the material gradually diffuses to the surface to achieve a new balance, and can also inhibit the occurrence of mildew and insects in the material; it can also use microwave revival, which can be performed at an appropriate magnetron frequency to reduce the impact of material surface cracking caused by uneven moisture distribution on quality, and can quickly passivate or kill bacteria and parasites inside the material.

[0014] Furthermore, the holes on the drum grading screen are divided into at least two grading areas according to the aperture size, and the closer the holes on the drum grading screen are to the feeding position, the smaller the aperture; a multi-stage vibrating screen is also provided below the rubbing crusher, and a shell suction device is provided above the multi-stage vibrating screen.

[0015] The above structure can screen the seeds according to the particle size. The closer the holes on the drum grading screen are to the feeding position, the smaller the aperture. When the seeds enter the drum grading screen, the seeds with small particle size fall first, then the seeds with medium particle size fall, and finally the seeds with large particle size fall. This can well screen and grade the seeds, reduce the occurrence of small particle size falling from large apertures, and screen more accurately. The multi-stage vibrating screen separates the shell and kernel of the broken seeds, and then sucks away the shell through the shell suction device, leaving only the kernel for the next processing, thereby improving the efficiency of shell and kernel separation.

[0016] Furthermore, it also includes a cleaning device arranged in front of the composite drying device, the cleaning device includes a cleaning tank, a spray device is installed above the cleaning tank, brush rollers are arranged in parallel on the inner side wall and the bottom of the cleaning tank, hard brushes are arranged on the two top brush rollers, and a soft brush is arranged on the middle brush roller.

[0017] With the above structure, many seeds for oil extraction have dust and impurity streaks on their surfaces, resulting in more impurities in the crude oil and excessive acid value. After cleaning, the impurities in the crude oil can be reduced. Moreover, since the seed shell is hard and the surface is smooth, conventional brush cleaning equipment cannot effectively embed the seeds due to the inappropriate hardness of the brush, and the cleaning effect is poor. The combination of hard brush and soft brush can not only limit the seeds, but also fully embed the seeds, effectively remove surface dust and streaks, and improve cleaning efficiency.

[0018] Furthermore, the cleaning equipment also includes an elevator connected to the discharge port of the cleaning tank, the elevator is connected to a vibrating dewatering screen, and the vibrating dewatering screen is connected to a water circulation system; a hot air blower is arranged above the vibrating dewatering screen, and a water tank for collecting water is arranged below the vibrating dewatering screen and below the elevator, and the water tank is connected to the water circulation system.

[0019] In the above structure, the seeds cleaned in the cleaning tank come out from the discharge port and enter the elevator, and the elevator sends the seeds to the vibrating dehydration screen, and the moisture in the seeds falls off by vibration and enters the water tank. Under the action of the hot air blower, the seeds can be quickly dehydrated, and the fallen water enters the water circulation system for recycling.

[0020] Furthermore, the invention also includes a raw material rejecting device arranged before the cleaning device, and the raw material rejecting device is an X-ray color sorter.

[0021] In the above structure, rubber tree seeds include an outer shell and a kernel. The outer shell is wrapped in a layer of wax, and the kernel is wrapped in a layer of short hairs. There is a gap between the outer shell and the kernel. After the seeds become moldy, moldy substances grow in the gaps. The X-ray color sorter can detect substances in the gaps, thereby screening and removing the moldy seeds.

[0022] Furthermore, a spectral color sorting device is arranged between the shelling device and the oil pressing device.

[0023] With the above structure, after the seeds are shelled, the seed kernels are exposed, and the color of the seed kernel surface is identified by the spectral color sorting equipment. The color of the moldy seeds surface changes, and the moldy seeds can be screened and removed.

[0024] The utility model discloses a rubber tree seed oil extraction device, which adopts the oil extraction device to extract oil from rubber tree seeds.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0026] 1. The utility model retains the active ingredients in the rubber tree seeds to the maximum extent, and prevents the loss of active ingredients due to high temperature drying through secondary drying and multi-stage drying and precise temperature control.

[0027] 2. The utility model reduces the occurrence of seed bursting during drying. Through internal drying with microwaves and external drying with hot air, the internal pressure of the seeds is guaranteed to be stable and will not burst.

[0028] 3. The utility model adopts solar energy to assist the addition of biofuel energy, and the two energies complement each other to ensure continuous heating; the vacuum equipment continuously draws air out of the warehouse body to form a negative pressure inside the warehouse body, so that the airflow inside the warehouse forms a continuous flow from bottom to top, maintaining ventilation and dryness inside the warehouse body, so that the materials in the warehouse body can be preserved longer and better.

[0029] 4. The utility model can fully bury the seeds by configuring the softness and hardness of the brush, and can apply humidity to cooperate with water flow to flush, effectively remove surface dust and streaks, and reduce impurities in oil extraction.

[0030] 5. The utility model is provided with a roller for classifying seeds according to their particle sizes for seed screening, and adopts disc-type rubbing crushers with different rotations to classify and crush seeds with different shell hardness, so that the seeds are fully crushed.

[0031] 6. The utility model adopts an X-ray color sorter for screening before cleaning and a spectral color sorter for screening after shelling, so as to effectively identify and remove moldy seeds and improve the quality of the extracted oil.

[0032] 7. The utility model realizes the extraction of rubber tree seed oil. Different from the existing oil extraction, the utility model develops and designs special equipment according to the particularity of rubber tree seeds, thereby improving the oil yield and quality of rubber tree seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The utility model is a structural schematic diagram of a grease extraction device.

[0034] Figure 2 Schematic diagram of the structure of the cleaning device in the embodiment.

[0035] Figure 3 for Figure 2 Sectional view of the AA section.

[0036] Figure 4 Schematic diagram of the structure of the microwave drying unit in the embodiment.

[0037] Figure 5 Schematic diagram of the structure of the constant temperature negative pressure drying unit in the embodiment.

[0038] Figure 6 It is a schematic diagram of the structure of the deshelling equipment in the embodiment.

[0039] Figure numerals: 1-raw material removal equipment, 2-cleaning equipment, 3-composite drying equipment, 4-shelling equipment, 5-spectral color sorting equipment, 6-oil pressing equipment, 01-cleaning tank, 02-soft brush, 03-hard brush, 04-elevator, 05-vibration dewatering screen, 06-water tank, 07-hot air blower, 08-water circulation system, 09-auger transmission shaft, 11-drying channel, 12-conveyor belt, 13-slow recovery channel, 14-temperature sensor One, 20-temperature sensor Two, 21-solar energy, 22-steam energy, 23-fan, 24-vacuum device, 25-vibrator, 26-lower section warehouse, 27-middle section warehouse, 28-upper section warehouse, 29-ventilation duct, 211-feeding port, 212-discharging port, 31-feeding port, 32-drum grading screen, 33-shell suction device, 34-grading channel, 35-rubbing crusher, 36-first-stage vibrating screen, 37-second-stage vibrating screen. DETAILED DESCRIPTION

[0040] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0042] In one embodiment, a fat extraction device is disclosed, including a composite drying device, a shelling device and an oil pressing device; the material to be pressed passes through the composite drying device, the shelling device and the oil pressing device in sequence; the composite drying device includes a microwave drying unit and a constant temperature negative pressure drying unit connected to each other, and a slow-release passage is provided between the microwave drying unit and the constant temperature negative pressure drying unit; the shelling device includes a drum grading screen and a rolling crusher, and holes of different apertures are provided on the drum grading screen, and holes of different apertures correspond to different rolling crushers. The fat extraction device also includes a raw material removal device and a cleaning device installed in front of the composite drying device; a spectral color sorting device is provided between the shelling device and the oil pressing device. In the embodiment, the oil pressing device is preferably a cold press.

[0043] like Figure 1As shown, in another embodiment, a rubber tree seed oil extraction device is disclosed, including a raw material removal device, a cleaning device, a composite drying device, a shelling device, a spectral color sorting device, and an oil pressing device connected in sequence. After the collected rubber tree seeds are simply graded, the moldy seeds are removed by the raw material removal device; they are transported to the cleaning device for cleaning to remove dust and stripes on the surface of the seeds; the washed seeds are dehydrated and then enter the composite drying device, and microwave drying and hot air drying are performed in sequence to reduce the moisture in the seeds; the dried seeds enter the drum grading screen, and the seeds after particle size classification enter the rubbing crusher for crushing, and the kernels enter the spectral color sorting device for screening, and the moldy kernels are removed, and enter the oil pressing device for pressing to obtain rubber tree seed oil.

[0044] In the embodiment, the raw material rejection equipment preferably adopts an X-ray color sorter, which can check the internal conditions of the seeds and screen out moldy seeds.

[0045] like Figure 2 and 3 As shown, in the embodiment, the cleaning device includes a cleaning tank, a spray device is installed above the cleaning tank, brush rollers are arranged in parallel on the inner side wall and the bottom of the cleaning tank, hard brushes are arranged on the two top brush rollers, and soft brushes are arranged on the middle brush roller. The cleaning device also includes an elevator connected to the discharge port of the cleaning tank, the elevator is connected to a vibrating dehydration screen, and the vibrating dehydration screen is connected to a water circulation system; a hot air blower is arranged above the vibrating dehydration screen, and a water tank for collecting water is arranged below the vibrating dehydration screen and below the elevator, and the water tank is connected to the water circulation system.

[0046] The cleaning tank is U-shaped, and the ratio of the number of hard brushes to the number of soft brushes is 2:7. The bottom surface of the cleaning tank is inclined, and the feed end is higher than the discharge end. The seeds in the cleaning tank move downward along the inclined surface during cleaning and come out from the discharge end. In one embodiment, an auger conveying shaft for conveying raw materials is arranged in the horizontal axis direction of the cleaning tank, and the conveying shaft inside the auger conveying shaft is spirally arranged. The height of the vibrating dewatering screen is adjustable. The speed of the brush roller and the auger conveying shaft is adjustable.

[0047] The cleaning device uses a soft brush and a hard brush set in a U-shaped cleaning tank to clean the seeds and remove dust and stripes on the surface of the seeds. After cleaning, the seeds are transported to a vibrating dehydration screen by a hoist for dehydration, and the water separated from the seeds and the dehydrated seeds are collected. The collected water is recycled through a water circulation system for cleaning the seeds. The seed cleaning device can be used in cleaning rubber tree seeds to effectively clean the dust and patterns on the surface of rubber tree seeds.

[0048] like Figure 4As shown, in an embodiment, the microwave drying unit includes a drying channel, a conveyor belt passes through the drying channel, and at least one independently controlled microwave generator is also arranged in the drying channel. One or more combinations of a fan, a vacuum pump, and a magnetron are arranged in the slow-recovery channel. Different numbers of magnetrons are arranged in each of the microwave generators according to the heating temperature, and each microwave generator is provided with a microwave power controller. The conveyor belt passes through the drying channel and the slow-recovery device in turn. A smoke detector is arranged under the drying channel, and the slow-recovery device is arranged after the exit of the drying channel. The number of magnetrons in each microwave generator decreases from the entrance to the exit of the drying channel, and the magnetrons in each microwave generator are evenly distributed on the upper wall of the microwave generator. A temperature sensor 1 is arranged in the microwave generator, and the temperature sensor 1 is arranged on the side wall of the microwave box. In one embodiment, the drying channel consists of one to twelve microwave generators, and the microwave generator can be increased or decreased according to the output. Moisture meters are provided at the entrance and exit of the drying channel. The moisture meter at the exit can display the moisture content lost by the dried material and the moisture content after drying. The moisture meter at the exit can input the expected moisture content value. The microwave power can be adjusted by the reduced moisture content and the moisture content after drying to achieve accurate drying of the material and ensure the quality of the material. Each microwave box is provided with a side door. The conveyor belt is a stepless speed conveyor belt. A hoist is provided at the front end of the conveyor belt. The materials on the conveyor belt are dried in multiple stages by multiple microwave generators to ensure that the internal pressure of the seeds is stable and will not burst. The smoke detector under the drying channel detects the smoke generated by the materials dropped from the conveyor belt to the bottom of the drying channel after long-term heating, and promptly reminds the staff to clean up; at the same time, a slow revival device is provided at the end of the drying channel, and the fan in the slow revival device is used to quickly dissipate heat, so that the material is redistributed under the action of the gradient difference after drying, and tends to be uniform, avoiding the deterioration of material quality due to excessive temperature difference, such as cracks, hardening, etc.

[0049] like Figure 5As shown, in the embodiment, the constant temperature negative pressure drying unit includes a warehouse body, a ventilation duct connected to hot air is arranged in the warehouse body, a feed port and a vacuum device are arranged on the top of the warehouse body, and a discharge port and a storage area are arranged on the bottom of the warehouse body. The warehouse body is divided into three sections, each section is provided with a ventilation duct, and the ventilation duct in each section is connected to a heating duct, the front end of the heating duct is connected to the heating device, and the rear end is divided into three heating ducts, and the three heating ducts are respectively provided with temperature control devices, and the ends of the three heating ducts are respectively connected to the ventilation ducts in the three sections of the warehouse body. The warehouse body is divided into three sections from top to bottom, namely, the upper warehouse, the middle warehouse and the lower warehouse. The upper warehouse, the middle warehouse and the lower warehouse are respectively connected with ventilation ducts and two temperature sensors. The temperatures in the ventilation ducts in the three sections are different. The temperature in the ventilation duct in the upper warehouse is 40-50°C, the temperature in the ventilation duct in the middle warehouse is 30-40°C, and the temperature in the ventilation duct in the lower warehouse is 25-30°C. The heating device includes one or more combinations of solar energy, steam energy, electric energy and biofuel energy. The heating device is connected to the ventilation duct through a hot air pipe, and a fan is arranged on the hot air pipe. The bottom of the lower warehouse is a funnel-shaped storage area, a vibrator is arranged outside the funnel-shaped storage area, a discharge port is arranged at the bottom of the warehouse body, and a discharge switch is installed on the discharge port. The constant temperature negative pressure drying unit also includes a lifting pipe, which is arranged outside the warehouse body, one end of the lifting pipe is connected to the feed port, and the other end is connected to the upstream device. The material is carried into the silo from the top through the lifting pipe. During the falling process, the heat is transferred to the ventilation duct through the heating device to dry the material. During the drying process, the wind speed and weight are controlled by the temperature sensor and valve. The dried material is stored in the silo. When it is needed, the discharge switch and vibrator are turned on to release the material from the bottom.

[0050] The composite drying equipment adopted in the utility model is to appropriately heat up the inside of the rubber tree seed by high-frequency microwave, and partially remove the internal moisture when removing the surface water of the seed, and this section becomes pre-drying, and then the pre-dried seeds are sent to the constant temperature negative pressure drying unit by the lifting mechanism; the internal pressure of the seeds at this time is higher than the outside, and the hot air heated by solar energy is sent into the closed silo, and the air that completes the temperature and humidity exchange is taken away by the vacuum pumping device on the top of the silo at the same time, and the seeds gradually release the internal moisture by gradually reducing the internal temperature and pressure, thereby completing the drying of the rubber tree seeds for secondary drying. This drying method utilizes microwave solar energy and wind energy, and a variety of drying methods greatly improve the drying efficiency of the rubber tree seeds, and at the same time, through precise temperature control, the active ingredients in the rubber tree seeds are maximized.

[0051] like Figure 6As shown, the shelling equipment includes a drum grading screen and a rubbing crusher. The drum grading screen is in a hollow cylindrical shape. The drum grading screen is provided with apertures of different sizes. A rubbing crusher is provided below the drum grading screen. The rubbing crusher is a disc-type rubbing crusher with different apertures. The apertures on the drum grading screen are divided into at least two grading areas, which can be specifically divided into 3-7 grading areas. The apertures in the grading areas are the same. The other end of the feed inlet of the drum grading screen is closed. In the direction from the feed inlet to the closed port, the apertures of the grading areas on the drum grading screen are getting larger and larger. At least two grading channels are provided between the drum grading screen and the rubbing crusher. There are at least three grading channels and corresponding grading areas. A plurality of rubbing crushers are provided below the middle first-level grading channel. The rubbing crusher is connected to a multi-stage vibrating screen for screening out impurities. The multi-stage vibrating screen includes a first-level vibrating screen and a second-level vibrating screen. The second-level vibrating screen is located below the first-level vibrating screen. A shell suction device is provided above the multi-stage vibrating screen. The shell suction device includes an air suction port and a fan. A driving motor for changing the rotation speed of the drum grading screen is also included.

[0052] The seeds enter the equipment through the feed port, and seeds of different particle sizes are screened out through sieve holes of different apertures in the drum grading screen, and impurities in some raw seeds are removed; the screened seeds pass through different grading channels and are shelled and crushed by disc-type rubbing crushers with a crushing degree of 2-4 petals per seed; the crushed seeds are screened for impurities through the first-level vibrating screen and the second-level vibrating screen; the shell suction device located above the first-level vibrating screen and the second-level vibrating screen absorbs the removed seed shells.

[0053] In one embodiment, a spectral color sorting device is provided between the shelling device and the oil pressing device to perform spectral color sorting on the kernels obtained after shelling to remove moldy kernels.

[0054] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A grease extraction device, characterized in that: It includes a composite drying device, a shelling device and an oil pressing device; the material to be pressed passes through the composite drying device, the shelling device and the oil pressing device in sequence; the composite drying device includes a microwave drying unit and a constant temperature negative pressure drying unit which are connected, and a slow-release passage is arranged between the microwave drying unit and the constant temperature negative pressure drying unit; the shelling device includes a drum grading screen and a rubbing crusher, and the drum grading screen is provided with holes of different apertures, and the holes of different apertures correspond to different rubbing crushers respectively.

2. The grease extraction device according to claim 1, characterized in that: The microwave drying unit comprises a drying channel, a conveyor belt passes through the drying channel, and at least one independently controlled microwave generator is also arranged in the drying channel.

3. The grease extraction device according to claim 1 or 2, characterized in that: The constant temperature negative pressure drying unit comprises a warehouse body, a ventilation duct connected to hot air is arranged in the warehouse body, a feed inlet and a vacuum pumping device are arranged on the top of the warehouse body, and a discharge port and a storage area are arranged on the bottom of the warehouse body.

4. The grease extraction device according to claim 1 or 2, characterized in that: One or more combinations of a fan, a vacuum pump and a magnetron are arranged in the slow-release channel.

5. The grease extraction device according to claim 1, characterized in that: The holes on the drum grading screen are divided into at least two grading areas according to the aperture size. The closer the holes on the drum grading screen are to the feeding position, the smaller the aperture is. A multi-stage vibrating screen is also arranged below the rubbing crusher, and a shell suction device is arranged above the multi-stage vibrating screen.

6. The grease extraction device according to claim 1, characterized in that: It also includes a cleaning device arranged in front of the composite drying device, the cleaning device includes a cleaning tank, a spray device is installed above the cleaning tank, brush rollers are arranged in parallel on the inner side wall and the bottom of the cleaning tank, hard brushes are arranged on the two top brush rollers, and a soft brush is arranged on the middle brush roller.

7. The grease extraction device according to claim 6, characterized in that: The cleaning equipment also includes an elevator connected to the discharge port of the cleaning tank, the elevator is connected to a vibrating dehydration screen, and the vibrating dehydration screen is connected to a water circulation system; a hot air blower is arranged above the vibrating dehydration screen, and a water tank for collecting water is arranged below the vibrating dehydration screen and below the elevator, and the water tank is connected to the water circulation system.

8. The grease extraction device according to claim 6, characterized in that: It also includes a raw material rejection device arranged in front of the cleaning device, and the raw material rejection device uses an X-ray color sorter.

9. The grease extraction device according to claim 1, characterized in that: A spectral color sorting device is arranged between the shelling device and the oil pressing device.

10. A rubber tree seed oil extraction device, characterized in that: The oil extraction device according to claim 1, 2, 3, 5, 6, 7, 8 or 9 is used to extract oil from rubber tree seeds.

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