A method and apparatus for reducing the rate of stuck-shell macadamia nuts

Abstract

The application discloses a method and device for reducing the sticky shell rate of macadamia nuts, and comprises the following steps: S1, breaking green skin; S2, separating green skin from shell nuts; S3, drying; S4, grading; S5, sticky removal treatment: different grades of nuts are respectively poured into a rotating arc-shaped prong grid sticky removal machine group for sticky removal work; and S6, opening; wherein the sticky removal machine group in S5 comprises a sound insulation shell, a treatment disc and arc-shaped grids, the treatment disc is installed on the top inside of the sound insulation shell, a plurality of arc-shaped grids are arranged in the treatment disc, a falling cylinder is welded at the bottom of the treatment disc, a spraying motor is installed between the treatment disc and the falling cylinder, and two arc-shaped grids are arranged directly below the falling cylinder. The sticky removal machine group is newly added, the pre-treatment and drying machine group is upgraded, the sticky shell rate of the macadamia nuts is greatly reduced, the energy consumption, noise and production cost are reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nut processing technology, and in particular to a method and apparatus for reducing the rate of stuck-shell macadamia nuts. Background Technology

[0002] Currently, my country's macadamia nut processing industry is mainly focused on primary processing. Due to inconsistent fruit maturity during harvesting, varying kernel plumpness among different varieties, and unreasonable design of drying equipment and processes, the shell sticking rate of macadamia nuts produced on a large scale in industrialized production is as high as 80%. This results in a persistently high shell sticking rate in processed macadamia nuts such as "open-shell macadamia nuts," significantly impacting the consumer experience. The high shell sticking rate and low whole kernel rate also lead to low yields of premium and first-grade kernels for processing enterprises, hindering their ability to achieve breakthroughs in profitability.

[0003] Secondly, due to the concentrated ripening and harvesting periods of macadamia nuts, there is a high demand for timely post-harvest processing. The drying process, which is the most time-consuming step, suffers from high efficiency and significant energy consumption, hindering the growth of processing enterprises. Post-harvest processing has become a bottleneck restricting the development of the macadamia nut industry, severely impacting production efficiency, profitability, and product quality, and has become a persistent problem in the industry. Freshly harvested macadamia nuts have a high moisture content. Before being processed into snack foods, they need to undergo processes such as removing the green husk, drying, and shelling to rapidly reduce the moisture content of the shells and nuts, facilitating long-term storage. The drying process is the most time-consuming part of post-harvest processing. Existing research shows that the shell sticking rate is greatly related to the drying process, and a reasonable drying process is crucial to the quality of nut products. Studies have found that when the moisture content of the macadamia nut shell is 6%–9% and the kernel moisture content is around 2%, the whole kernel rate is the highest and the shell sticking rate is the lowest.

[0004] The noise level in nut processing plants can reach over 90 decibels, which is close to the maximum decibel level that humans can tolerate. This can cause serious harm to the health of workers involved in the processing and also cause noise pollution to the surrounding environment.

[0005] The excessively high shell sticking rate severely restricts the development of the macadamia nut industry nationwide. Therefore, it is urgent to develop suitable post-harvest processing technology and equipment for macadamia nuts to reduce the shell sticking rate, so as to meet the rapidly growing market demand, reduce the production costs of macadamia nut and other nut food processing enterprises, and thus improve the product quality and market competitiveness of macadamia nuts in my country. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method and apparatus for reducing the rate of stuck-shell macadamia nuts.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for reducing the rate of stuck-shell macadamia nuts includes the following specific steps:

[0009] S1: Peeling: Green-skinned nuts are lifted by a conveyor belt elevator to the peeling machine. Two rollers rotate, crushing the green skin of the nuts that fall between the rollers and transporting them to the next process. A soundproof cover is installed on the outside of the peeling machine.

[0010] S2: Separation of green peel and shell: The mixture of green peel and shell flows into the water separation tank. The lighter green peel floats up and the heavier shell sinks down. A slanted iron baffle in the tank blocks the green peel floating on the water surface and is mechanically sent to filter. The water flowing out is recycled and reused to separate the peel and shell. The filtered green peel is manually scooped out and discarded. Workers stand behind the slanted iron baffle to scoop out the green peel that has slipped through the net.

[0011] S3: Drying: The conveyor belt elevator lifts the wet nuts to the top of the drying unit, and they fall into the corresponding drying chamber of the drying unit by gravity. The number of drying chambers to be opened at one time is determined according to actual needs. After setting the parameters, continuous drying for 72 hours is started. During this period, there is no need to turn the nuts up and down or move them.

[0012] S4: Grading: The dried nuts are transported to the grading machine by a conveyor belt. The grading machine is divided into 6 cylindrical mesh cages. The outer wall of each mesh cage has a different aperture. The mesh cages are driven by a motor to rotate continuously. The nuts roll in the mesh cages and pass through the 6 mesh cages with the smallest aperture size from near to far. The smallest ones fall down first and are grade 1 nuts, and the largest ones fall down last and are grade 6 nuts. They are then bagged according to grade.

[0013] S5: De-adhesion treatment: Different grades of nuts are poured into the rotary arc-shaped fork grid de-adhesion unit. The nuts are first lifted by a vertical elevator with a lifting speed range of 15-35m / s, and then guided into the processing tray by the feed guide chute. The rotary motor drives the arc grid on the rotating shaft to rotate continuously with a rotation speed range of 25-45r / min. The nuts collide with the arc grid to de-adhere. As the nuts fall downwards due to gravity, they are blown upwards by the airflow sprayed by the jet motor, thus continuously impacting the arc grid. Finally, they fall to the jet nozzle and enter the drop cylinder, and then are hit by gravity on two impact steel plates to complete the de-adhesion work.

[0014] S6: Opening: Use a special macadamia nut opening machine to make a cut on each nut to make it easier to open and extract the kernel for sale or process into ready-to-eat nut snacks.

[0015] The debonding unit in S5 includes a soundproof shell, a processing disc, and an arc-shaped grid. The processing disc is fixedly installed inside the soundproof shell at the top. The processing disc has multiple arc-shaped grids inside. A falling cylinder is vertically welded to the bottom of the processing disc. A jet motor is fixedly installed between the processing disc and the falling cylinder. Two impact steel plates are provided and arranged in parallel. The two impact steel plates are inclined and arranged below the falling cylinder.

[0016] As a further technical solution of the present invention, in step S3, the drying unit is assembled from four independent, adjacent drying chambers, each with a 10cm enclosed wall and a capacity of 17m³. 3 It can hold 13.5 tons of nuts and shells.

[0017] As a further technical solution of the present invention, each of the drying chambers is equipped with two 1.1kw exhaust fans on the top, a heat pump unit is installed outside the drying chamber, and a heat circulation unit is installed inside the drying chamber. The exhaust fans exhaust the hot and humid air inside the drying chamber, and then the dehumidified and dehydrated hot air is returned to the heat pump dryer in the heat pump unit outside the room through a double-layer exhaust pipe to recover heat and improve the efficiency of the heat pump.

[0018] As a further technical solution of the present invention, the built-in rack of the drying room is inclined, the stacking thickness is 0.8m-1.5m, and the processing capacity of green fruit in the drying room is 30 tons / day.

[0019] As a further technical solution of the present invention, in S3, the drying process of the drying unit is as follows: cold air blowing for 4 hours + 35℃ for 10 hours + 40℃ heating for n hours + 45℃ heating for n hours + 50℃ heating for n hours + 55℃ heating for n hours, with a total duration of 72 hours.

[0020] An apparatus for reducing the rate of stuck-shell macadamia nuts, and a method for reducing the rate of stuck-shell macadamia nuts, the de-sticking unit further includes a rotary motor and a vertical elevator, the vertical elevator is vertically fixedly installed inside one side of the soundproof shell, a feed inlet is opened at the bottom of one side of the vertical elevator, and a feed guide groove is inclinedly arranged between the discharge end of the vertical elevator and the processing plate.

[0021] As a further technical solution of the present invention, the rotary motor is vertically fixedly installed in the middle of the top of the processing disk, and a rotating shaft is vertically fixedly installed at the bottom of the output end of the rotary motor, and multiple arc-shaped grilles are uniformly fixedly installed on the outer periphery of the rotating shaft.

[0022] As a further technical solution of the present invention, a discharge guide groove is inclinedly provided below the two impact steel plates, and a discharge port is provided on the soundproof shell at the bottom end of the discharge guide groove.

[0023] As a further technical solution of the present invention, the length of the falling cylinder is 1-3m, and there is a gap in the vertical pipe between the falling cylinder and the two impact steel plates.

[0024] As a further technical solution of the present invention, the distance between the two impact steel plates is 25-35cm, the thickness of the impact steel plates is 4-8cm, the inclination angle is 38-58°, and the area is 25m². 2 -64m 2 .

[0025] The beneficial effects of this invention are as follows:

[0026] 1. Macadamia nuts are first centrifuged and accelerated through a processing disc, causing the shell to deform and the kernel to loosen from the inside of the shell. After being processed by the processing disc, the kernel falls between two impact steel plates due to gravity and is continuously impacted to complete the de-sticking process. The processing disc contributes 80% of the de-sticking effect, while the two impact steel plates contribute the remaining 20%. Through multiple actual operations, it has been found that the rotary arc-shaped fork grid de-sticking unit reduces the shell sticking rate of dried macadamia nuts from the industry average of 48%-57% to 4%-9%, significantly reducing the shell sticking rate that is common in the macadamia nut processing industry.

[0027] 2. By making the drying unit into a drying room with thicker, enclosed walls, the drying efficiency is improved, energy consumption is reduced, and the drying time is shortened from more than 96 hours to 72 hours. In addition, the heat from the exhaust humid air can be recovered to improve the efficiency of the heat pump, forming a green processing method and saving 30%-80% of operating costs.

[0028] 3. The traditional green peeling machine with 4 shafts was modified to have 2 rollers for peeling. This reduced the noise of the extrusion process while maintaining peeling efficiency. A soundproof cover was also added to the peeling device, reducing the noise to 70 decibels. Secondly, the open drying system was transformed into a drying chamber. The 10cm thick outer wall of the drying chamber blocked the noise of the heat circulation unit, reducing the noise of the drying process to 60±5 decibels. These two steps reduced noise pollution for processing enterprises and improved the working comfort of workers. Attached Figure Description

[0029] Figure 1 is a flowchart of a method for reducing the shell sticking rate of macadamia nuts proposed in this invention, wherein 1a is a simplified text flowchart, 1b is a structural flowchart, and 1c is a detailed text flowchart.

[0030] Figure 2 is a schematic diagram of the rotary arc-shaped fork grid de-adhesion unit in the device for reducing the sticky shell rate of macadamia nuts proposed in this invention, wherein 2a is a side cross-sectional view and 2b is a top cross-sectional view.

[0031] Figure 3The image shows nuts that were not treated with a debinding machine in the first test of this invention;

[0032] Figure 4 These are images of nuts processed by a de-adhesion machine in the first experiment of this invention;

[0033] Figure 5 Images of nuts from the second experiment of this invention, excluding those treated with a debinding machine;

[0034] Figure 6 This is a picture of nuts after being processed by a de-adhesion machine in the second test of this invention.

[0035] In the diagram: 1. Vertical elevator; 2. Drop cylinder; 3. Feed inlet; 4. Discharge outlet; 5. Feed guide chute; 6. Rotary motor; 7. Rotating shaft; 8. Processing disc; 9. Arc-shaped grid; 10. Spray motor; 11. Soundproof shell; 12. Impact steel plate; 13. Discharge guide chute. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0037] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Please refer to Figures 1-2. A method for reducing the rate of stuck-shell macadamia nuts includes the following specific steps:

[0040] S1: Peeling: Green-skinned nuts are lifted by a conveyor belt elevator to the peeling machine. Two rollers rotate, crushing the green skin of the nuts that fall between the rollers and transporting them to the next process. The traditional peeling machine with 4 shafts has been modified to peel with 2 rollers, which reduces the noise of the peeling process while ensuring the peeling efficiency. In addition, a soundproof cover is installed on the outside of the peeling machine to reduce the noise to 70 decibels.

[0041] S2: Separation of green peel and shell: The mixture of green peel and shell flows into the water separation tank. The lighter green peel floats up and the heavier shell sinks down. A slanted iron baffle in the tank blocks the green peel floating on the water surface and is mechanically sent to filter. The water flowing out is recycled and reused to separate the peel and shell. The filtered green peel is manually scooped out and discarded. Workers stand behind the slanted iron baffle to scoop out the green peel that has slipped through the net.

[0042] S3: Drying: The conveyor belt elevator lifts the wet nuts to the top of the drying unit, and they fall into the corresponding drying chamber of the drying unit by gravity. The number of drying chambers to be opened at one time is determined according to actual needs. After setting the parameters, continuous drying for 72 hours is started. During this period, there is no need to turn the nuts up and down or move them.

[0043] S4: Grading: The dried nuts are transported to the grading machine by a conveyor belt. The grading machine is divided into 6 cylindrical mesh cages. The outer wall of each mesh cage has a different aperture. The mesh cages are driven by a motor to rotate continuously. The nuts roll in the mesh cages and pass through the 6 mesh cages with the smallest aperture size from near to far. The smallest ones fall down first and are grade 1 nuts, and the largest ones fall down last and are grade 6 nuts. They are then bagged according to grade.

[0044] S5: De-adhesion treatment: Nuts of different grades are poured into the rotary arc-shaped fork grid de-adhesion unit. The nuts are first lifted by the vertical elevator 1, with a lifting speed range of 15-35m / s. Then, they are guided into the processing tray 8 by the feed guide 5. The rotary motor 6 drives the arc grid 9 on the rotating shaft 7 to rotate continuously, with a rotation speed range of 25-45r / min. The nuts collide with the arc grid 9 to de-adhere. As the nuts fall downwards due to gravity, they are blown upwards by the airflow sprayed by the jet motor 10, thus continuously impacting the arc grid 9. Finally, they fall to the spray nozzle and enter the falling cylinder 2. Then, they are struck by gravity on two impact steel plates 12 to complete the de-adhesion work.

[0045] S6: Opening: Use a special macadamia nut opening machine to make a cut on each nut to make it easier to open and extract the kernel for sale or process into ready-to-eat nut snacks.

[0046] The debonding unit in S5 includes a soundproof shell 11, a processing disc 8, and an arc-shaped grid 9. The processing disc 8 is fixedly installed inside the soundproof shell 11 at the top. Multiple arc-shaped grids 9 are provided inside the processing disc 8. A falling cylinder 2 is vertically welded to the bottom of the processing disc 8. A jet motor 10 is fixedly installed between the processing disc 8 and the falling cylinder 2. Two impact steel plates 12 are provided and arranged in parallel. The two impact steel plates 12 are inclinedly arranged below the falling cylinder 2.

[0047] In a preferred embodiment, in step S3, the drying unit is assembled from four independent, adjacent drying chambers, each with a 10cm thick enclosed wall and a capacity of 17m³. 3 It can hold 13.5 tons of nuts and shells. The open drying system has been transformed into a drying room, and the 10cm thick outer wall of the drying room isolates the noise of the heat circulation unit, reducing the noise of the drying process to 60±5 decibels.

[0048] In a preferred embodiment, each drying chamber is equipped with two 1.1 kW exhaust fans on the top, a heat pump unit is installed outside the drying chamber, and a heat circulation unit is installed inside the drying chamber. The exhaust fans exhaust the hot and humid air inside the drying chamber, and then the dehumidified and dehydrated hot air is returned to the heat pump dryer in the outdoor heat pump unit through a double-layer exhaust pipe to recover heat and improve the efficiency of the heat pump.

[0049] In a preferred embodiment, the internal racks of the drying chamber are sloping, with a stacking thickness of 0.8m-1.5m, and the processing capacity of green macadamia nuts in the drying chamber is 30 tons / day. The drying chamber has the following advantages: simple structure, high efficiency, flexible and adjustable, no need for turning, energy saving, and low energy consumption. The power consumption of this drying unit is 0.08 yuan / kg, while the power consumption of ordinary drying equipment for drying macadamia nuts is 0.16 yuan / kg-0.2 yuan / kg.

[0050] In a preferred embodiment, in step S3, the drying process of the drying unit is as follows: 4 hours of cold air blowing + 10 hours at 35℃ + n hours of heating at 40℃ + n hours of heating at 45℃ + n hours of heating at 50℃ + n hours of heating at 55℃, for a total duration of 72 hours. The best drying method for de-sticking is rapid drying with high heat, rapid temperature increase, and rapid temperature decrease, which makes the kernels crisp and dry on the outside and moist on the inside. When the internal moisture content is greater than the external moisture content, it is very beneficial for processing open-shelled nuts.

[0051] Please refer to Figure 2. A device for reducing the rate of stuck-shell macadamia nuts is used to implement a method for reducing the rate of stuck-shell macadamia nuts. The de-sticking unit also includes a rotary motor 6 and a vertical elevator 1. The vertical elevator 1 is vertically fixedly installed inside one side of the soundproof housing 11. A feed inlet 3 is opened at the bottom of one side of the vertical elevator 1. A feed guide chute 5 is inclinedly arranged between the discharge end of the vertical elevator 1 and the processing plate 8.

[0052] In a preferred embodiment, a rotary motor 6 is vertically fixedly installed in the center of the top of the processing tray 8, and a rotating shaft 7 is vertically fixedly installed at the bottom of the output end of the rotary motor 6, with multiple arc-shaped grilles 9 evenly fixedly installed on the outer periphery of the rotating shaft 7. The rotational speed of the output end of the rotary motor 6 can control the flow rate of the nuts.

[0053] In a preferred embodiment, a discharge guide 13 is inclinedly provided below the two impact steel plates 12, and a discharge port 4 is provided on the soundproof housing 11 at the bottom end of the discharge guide 13.

[0054] Nuts are added into the vertical elevator 1 through the feed inlet 3. The nuts are lifted by the vertical elevator 1 to the feed guide 5 and then guided to the processing tray 8. The rotary motor 6 is started to drive the multiple arc-shaped grids 9 on the rotating shaft 7 to rotate. The nuts collide with the multiple arc-shaped grids 9 to de-adhere. As the nuts fall downwards due to gravity, they are blown upwards by the airflow sprayed by the jet motor 10, thus continuously impacting the arc-shaped grids 9. Finally, they fall to the jet nozzle and enter the falling cylinder 2. Then, due to gravity, they are hit by two impact steel plates 12 to complete the de-adhesion work. The de-adhesion nuts fall onto the discharge guide 13 and are guided to the discharge port 4 for discharge.

[0055] In a preferred embodiment, the length of the falling cylinder 2 is 1-3m, and there is a gap in the vertical pipe between the falling cylinder 2 and the two impact steel plates 12, so that the falling nuts are scattered and do not collide before hitting the impact steel plates 12, thus preventing the loss of force due to collision.

[0056] In a preferred embodiment, the distance between the two impact steel plates 12 is 25-35cm, the thickness of the impact steel plates 12 is 4-8cm, the tilt angle is 38-58°, and the area is 25m². 2 -64m 2 The distance, installation angle, and area between the two impact steel plates 12 are all important, as they can all affect the fruit's impact and reduce the sticking effect.

[0057] Experimental data of the de-adhesion unit:

[0058] First experiment: Without de-shelling treatment, after opening, 48 nuts had their shells stuck to them, and 52 were separated from their shells, resulting in a shell-stuck rate of 48%. Figure 3 As shown.

[0059] After processing with a de-shelling machine, the number of nuts with shells stuck to them was 9, and 91 were separated from their shells, reducing the shell-sticking rate to 9%. Figure 4 As shown.

[0060] Second experiment: Without de-shelling treatment, after opening, 57 nuts had their shells stuck to them, and 43 were separated from their shells, resulting in a shell-sticking rate of 57%. Figure 5 As shown.

[0061] After processing with a de-shelling machine, the number of nuts with shells stuck to them was 4 after opening, and 96 nuts were separated from their shells, reducing the shell-sticking rate to 4%. Figure 6 As shown.

[0062]

[0063] Table 1. Results of shell sticking rate test for macadamia nuts with and without de-sticking treatment.

[0064]

[0065] Table 2. Noise levels in the workshop before and after adding sound insulation cotton during the two processes.

[0066] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: by adding a rotary arc-shaped fork grid macadamia nut de-sticking unit, and by modifying, upgrading and recombining the pretreatment and de-sticking units and the drying unit, the shell sticking rate of macadamia nuts is greatly reduced, the energy consumption, working noise and production costs of macadamia nut processing enterprises are reduced, the work efficiency is improved, the occupational noise damage to practitioners is reduced, and the degree of green processing of macadamia nuts is improved.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0068] This invention is intended to cover all such substitutions, modifications, and variations falling within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method of reducing the incidence of sticky shell macadamia nuts, characterised by, It comprises the following specific steps: S1: breaking green skin: the green skin nuts are lifted to the green skin removing machine by the conveyor belt elevator, two rotating rollers crush and squeeze the green skin of the green skin and shell mixture falling between the rollers, and then the mixture is transported to the next process; S2: separation of green skin and shell: the mixture of green skin and shell flows into the water selection tank, the light green skin floats up and the heavy shell sinks down, a slanted iron bar in the water tank blocks the green skin floating on the water surface and sends it to the filter by machinery, the outflowing water is recycled and reused for separating the skin and shell, the filtered green skin is manually fished out and discarded, and a worker stands behind the slanted iron bar to fish out the missed green skin; S3: drying: the wet nuts are lifted to the top of the drying machine group by the conveyor belt elevator, and then fall into the corresponding drying room of the drying machine group by gravity, according to the actual demand, several drying rooms are opened at a time, and after setting the parameters, the continuous drying is started for 72 hours, and the nuts do not need to be turned over and moved during this period; S4: grading: the dried nuts are transported to the grading machine by the conveyor belt, the grading machine is divided into six cylindrical mesh cages, the outer wall of each mesh cage is of different aperture, the mesh cage is driven by a motor to rotate continuously, the nuts roll in the mesh cage, and pass through the mesh cages of six aperture sizes from small to large in turn, the smallest nuts fall down first, which are the first grade nuts, and the largest nuts fall down last, which are the sixth grade nuts, and the nuts are packed according to the grade; S5: deblocking treatment: the nuts of different grades are respectively poured into the rotating arc-shaped prong grid deblocking machine group, the nuts are first lifted by the vertical elevator (1) with a lifting speed range of 15-35 m / s, and then guided into the treatment disc (8) by the feeding guide groove (5), the arc-shaped grid (9) on the rotating shaft (7) is continuously rotated by the rotating motor (6) with a rotating speed range of 25-45 r / min, the nuts hit the arc-shaped grid (9) for deblocking, and the nuts are blown upward by the airflow sprayed by the spraying motor (10) during falling downward by gravity, so as to continuously hit the arc-shaped grid (9), and finally fall into the falling cylinder (2) at the spraying port and complete the deblocking work by being hit on the two impact steel plates (12) by gravity; S6: opening: an Australian nut special opening machine is used to draw a line on each nut, which is convenient for subsequent opening, kernel taking, selling or processing into instant nut snack food; In the deblocking machine group in S5, the deblocking machine group comprises a soundproof shell (11), a treatment disc (8) and an arc-shaped grid (9), the treatment disc (8) is fixedly installed above the inside of the soundproof shell (11), a plurality of arc-shaped grids (9) are arranged in the treatment disc (8), a falling cylinder (2) is vertically welded at the bottom of the treatment disc (8), a spraying motor (10) is fixedly installed between the treatment disc (8) and the falling cylinder (2), and two impact steel plates (12) are arranged in parallel and are obliquely arranged below the falling cylinder (2).

2. A method of reducing the rate of sticky shell macadamia nuts as claimed in claim 1, characterised in that, The S3, drying unit is assembled by four independent next drying room, each drying room has 10 cm closed wall, each drying room capacity of 17m 3 Can be equipped with 13.5 tons of nut shell fruit.

3. A method of reducing the incidence of sticky shell macadamia nuts as claimed in claim 2, characterised in that, Two 1.1kw exhaust fans are installed on the top of each drying room, a heat pump unit is installed outside the drying room, and a heat circulation unit is installed inside the drying room.

4. A method of reducing the incidence of sticky shell macadamia nuts as claimed in claim 3 wherein, The built-in shelves of the drying room are inclined, the stacking thickness is 0.8-1.5m, and the processing capacity of the green peel fruit in the drying room is 30 tons / day.

5. A method of reducing the incidence of sticky shell macadamia nuts as claimed in claim 4 wherein, In S3, the drying process of the drying unit is: cold air blowing for 4h+35℃ for 10h+40℃ heating for nh+45℃ heating for nh+50℃ heating for nh+55℃ heating for nh, and the total time is 72h.

6. An apparatus for reducing the rate of sticky shell macadamia nuts, characterised in that, A method for reducing the rate of sticky shell of macadamia nuts, according to any one of claims 1-5, the deshelling unit further comprises a rotary motor (6) and a vertical elevator (1), the vertical elevator (1) is vertically fixedly installed on one side inside the soundproof shell (11), a feed inlet (3) is formed in the bottom of one side of the vertical elevator (1), and a feed guide groove (5) is obliquely arranged between the discharge end of the vertical elevator (1) and the treatment disc (8).

7. A device for reducing the rate of sticky shell macadamia nuts according to claim 6, characterised in that, The rotary motor (6) is vertically fixedly installed in the middle of the top of the treatment disc (8), the output end bottom of the rotary motor (6) is vertically fixedly installed with a rotating shaft (7), and a plurality of arc-shaped gratings (9) are uniformly fixedly installed on the outer periphery of the rotating shaft (7).

8. A device for reducing the rate of sticky shell macadamia nuts according to claim 7, characterised in that, Two impact steel plates (12) are obliquely arranged below the discharge guide groove (13), and a discharge port (4) is formed at the bottom end position of the discharge guide groove (13) on the soundproof shell (11).

9. A device for reducing the rate of sticky husk macadamia nuts according to claim 8, characterised in that, The length of the falling cylinder (2) is 1-3m, and there is a gap between the vertical pipeline between the falling cylinder (2) and the two impact steel plates (12).

10. A device for reducing the rate of sticky macadamia nut shells according to claim 9, characterised in that, The distance between the two impact steel plates (12) is 25-35 cm, the thickness of the impact steel plate (12) is 4-8 cm, the inclination angle is 38-58°, and the area is 25 m 2 -64 m 2 .

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