Post-treatment system for stir-frying pine nuts

Abstract

The invention relates to the technical field of pine nut processing equipment, in particular to a post-processing system for stir-frying pine nuts. The pine nut stir-frying post-treatment system comprises a stainless steel kettle, and the side wall of the bottom of the stainless steel kettle is communicated with a gas input pipe; the top of the stainless steel kettle 1 is communicated with a condenser A; the input end of the condenser A is communicated with the top of the stainless steel kettle, and the output end of the condenser A is communicated with a U-shaped pipe A; one end of the U-shaped pipe A is communicated with the output end of the condenser A, and the other end of the U-shaped pipe A is communicated with a buffer tank; the buffer tank communicates with a vacuum pump; and the bottom of the U-shaped pipe A is communicated with a condensed oil recovery tank. According to the pine nut stir-frying device, the problem of oil fume pollution can be effectively solved, meanwhile, oil fume can be recycled, the overall production cost of stir-frying of pine nuts is reduced, the cooling effect on the pine nuts through vacuumizing cooling is better, the treatment time after cooling is shortened, and the overall production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pine nut processing equipment, and in particular to a post-processing system for roasted pine nuts. Background Art

[0002] Pine nuts are seeds of Pinus koraiensis and other plants of the Pinaceae family. They have high dietary and medicinal value. As a delicious and nutritious nut food, fried pine nut food processed from pine nuts is favored by the general public. As raw materials, pine nuts need to go through multiple processes to obtain high-quality fried pine nut food. The processing technology of fried pine nuts includes pine nut selection, pine nut skin grinding, frying and opening, cooling and post-processing, packaging and storage.

[0003] After being fried, the pine nuts need to be separated by oil. The temperature of the pine nuts after oil separation is about 75-90℃. According to statistics, the temperature of the pine nuts after oil separation in summer is between 85-90℃, while in winter when the temperature is relatively low, the temperature of the pine nuts after oil separation is between 75-80℃. Pine nuts at around 75-90℃ cannot be directly flowed to the packaging production line for packaging processing. They need to be input into the cooling device for fan cooling and post-processing. The fried pine nuts at around 75-90℃ are cooled to 35-40℃, and then transported to the packaging production line for packaging processing. The fried pine nuts after packaging processing by the packaging production line are the finished pine nut food that is finally circulated to consumers.

[0004] The existing pine nut cooling device for post-cooling treatment includes a conveyor belt and a fan. Pine nuts with a temperature of about 75-90°C are transported on the conveyor belt. During the pine nut transportation process, the fan performs air cooling treatment on the pine nuts to reduce the temperature to 35-40°C. The conveyor belt length in the existing production line is 40-50m, and the fan wind speed is 4-6m / s. The pine nut cooling device on the applicant's original roasted pine nut production line has a conveyor belt distance of 4.5m, a transmission speed of 5cm / s, and a fan at the maximum speed of 5.4m / s. The temperature of the pine nuts output by the above-mentioned pine nut cooling device is 35-38°C. If the output pine nut temperature is too high, the output pine nut temperature is controlled by reducing the transmission speed.

[0005] With respect to the above-mentioned existing pine nut cooling device, the inventor discovered the following defects: the existing pine nut cooling device will produce oily fumes during the cooling and post-processing process of pine nuts, which will not only affect the environmental quality of the entire workshop, but also the condensed oily fumes will adhere to the surface of the production equipment in the workshop. These oil stains are difficult to clean and are prone to breed bacteria, affecting the sanitation and safety of the food production workshop, and the production equipment needs to be cleaned and maintained regularly. In summary, the existing pine nut cooling device will produce oily fumes that pollute the sanitation and safety of the working environment and increase the frequency of cleaning and maintenance of production equipment, resulting in high hidden costs for the cooling and post-processing of pine nuts, which restricts the improvement of the overall production efficiency of fried pine nuts. To this end, the inventor has developed a vacuum-type post-processing system for fried pine nuts. Summary of the invention

[0006] In order to solve the problem that the existing pine nut cooling device will generate oil fume to pollute the sanitation and safety of the working environment and increase the frequency of cleaning and maintenance of production equipment, resulting in high hidden costs for post-cooling processing of pine nuts, the present application provides a roasted pine nut post-processing system, which cools the pine nuts by vacuuming, effectively solving the oil fume pollution problem, and can also recycle and reuse the oil fume, reducing the overall production cost of roasting pine nuts. In addition, the vacuum cooling effect is higher, which can improve the overall production efficiency.

[0007] The present application provides a roasted pine nut post-processing system, which is realized by the following technical solutions: A post-processing system for roasting pine nuts comprises a stainless steel kettle, wherein the bottom side wall of the stainless steel kettle is connected with a gas input pipe; the top of the stainless steel kettle is connected with a condenser A; the input end of the condenser A is connected with the top of the stainless steel kettle, and the output end of the condenser A is connected with a U-shaped tube A; one end of the U-shaped tube A is connected with the output end of the condenser A, and the other end of the U-shaped tube A is connected with a buffer tank; the buffer tank is connected with a vacuum pump; and the bottom of the U-shaped tube A is connected with a condensed oil recovery tank.

[0008] The present application can effectively solve the oil fume pollution problem, and can also recycle and reuse the oil fume, thereby reducing the overall production cost of frying pine nuts. The vacuum cooling has a better cooling effect on the pine nuts, shortens the post-cooling processing time, and improves the overall production efficiency.

[0009] Preferably, a pulse valve is provided on the gas input pipe; an air flow dispersion plate is provided at the bottom of the stainless steel kettle, and the air flow dispersion plate is connected to the gas input pipe.

[0010] By adopting the above technical solution, pulse nitrogen can not only promote the turning of pine nuts, but also carry the heat of pine nuts, improve the overall cooling efficiency of pine nuts, and thus reduce the total cost of frying pine nuts.

[0011] Preferably, an airflow cavity connected to the gas input pipe is formed inside the airflow dispersion disk; a plurality of airflow output holes connected to the airflow cavity are formed on the upper surface of the airflow dispersion disk; and the central axis of the airflow output hole is parallel to the central axis of the stainless steel kettle.

[0012] By adopting the above technical solution, the overall pine nut cooling efficiency can be further improved.

[0013] Preferably, the aperture of the airflow output hole needs to be smaller than the diameter of the pine nut; the aperture of the airflow output hole is 1-3 mm; the sum of the aperture areas of all airflow output holes is equal to 20-35% of the upper surface area of ​​the flow dispersion disk.

[0014] By adopting the above technical solution, the overall pine nut cooling efficiency can be further improved.

[0015] Preferably, the gas input into the stainless steel kettle through the gas input pipe is low-temperature 4N nitrogen; the kettle pressure in the stainless steel kettle is 0.02-0.04MPa; the vacuuming operation of the stainless steel kettle is as follows: first, nitrogen is introduced to exhaust the air in the stainless steel kettle, and then the kettle is evacuated to a pressure of 0.02-0.04MPa, and the amount of nitrogen input into the gas input pipe and the amount of air pumped by the vacuum pump are adjusted so that the amount of nitrogen input into the gas input pipe is equal to the amount of air pumped by the vacuum pump, and the pressure of the stainless steel kettle is maintained at 0.02-0.04MPa.

[0016] By adopting the above technical solution, the overall pine nut cooling efficiency is improved while ensuring the taste of the fried pine nuts.

[0017] Preferably, a first temperature detector is provided on the pipe section connecting the U-shaped tube A to the output end of the condenser A; a second temperature detector and a first battery valve are provided in sequence on the pipe section connecting the U-shaped tube A to the buffer tank; and a third temperature detector is provided on the pipe section connecting the U-shaped tube A to the condensed oil recovery tank.

[0018] By adopting the above technical solution and monitoring the temperature of the extracted oil fume in real time, the oil fume can be effectively condensed, the recovery efficiency of the condensed oil can be improved, and the recovered oil can be recycled again under the protection of nitrogen.

[0019] Preferably, the pipe section connecting the third temperature detector and the first solenoid valve is connected with a transfer tube on the circumference, and a second solenoid valve is arranged on the transfer tube; the transfer tube is connected with a condenser B; the input end of the condenser B is connected with the transfer tube, and the output end of the condenser B is connected with a U-shaped tube B; one end of the U-shaped tube B is connected with the output end of the condenser B, and the other end of the U-shaped tube B is connected to a buffer tank; the bottom of the U-shaped tube B is connected to a condensed oil recovery tank through a pipeline.

[0020] Preferably, a third temperature detector 4 is provided on the pipe section connecting the U-shaped tube B to the output end of the condenser B; a fourth temperature detector 4 is provided on the pipe section connecting the U-shaped tube B to the buffer tank; and a sixth temperature detector is provided on the pipe section connecting the U-shaped tube B to the condensed oil recovery tank.

[0021] By adopting the above technical solution, the recovery efficiency of condensed oil can be further improved.

[0022] Preferably, a driving motor is fixedly connected to the top of the stainless steel kettle; the output shaft of the driving motor is coaxially fixedly connected to a conveying screw through a coupling; one end of the conveying screw is coaxially fixedly connected to the output shaft of the driving motor, and the other end of the conveying screw passes through the top of the stainless steel kettle and extends to the bottom of the stainless steel kettle; a 20-50mm gap is reserved between the bottom of the conveying screw and the upper surface of the airflow dispersion disk; a stainless steel casing is fixedly connected to the inside of the stainless steel kettle; the stainless steel casing is sleeved on the outside of the conveying screw; a flow channel for pine nuts to flow is formed between the conveying screw and the inside of the stainless steel casing; a 20-50mm gap is reserved between the bottom of the stainless steel casing and the upper surface of the airflow dispersion disk; a number of pine nut outflow holes are opened on the upper side wall of the stainless steel casing.

[0023] Preferably, a dispersion cap with an inverted U-shaped cross-section is fixedly connected to the middle outer wall of the stainless steel sleeve; the diameter of the dispersion cap is equal to 0.8-0.95 times the inner diameter of the stainless steel kettle; the gap between the side wall of the dispersion cap and the inner wall of the stainless steel kettle 1 is larger than the pine nut particle size.

[0024] By adopting the above technical scheme, under the conveying screw driven by the driving motor, the pine nuts located at the bottom of the stainless steel kettle move to the pine nut outflow hole opened on the upper side wall of the stainless steel casing through the flow channel between the conveying screw and the inside of the stainless steel casing, and the pine nuts flow out from the pine nut outflow hole and fall onto the dispersion cap with an inverted U-shaped cross-section. Under the dispersion effect of the dispersion cap with an inverted U-shaped cross-section, the pine nuts finally fall to the bottom of the stainless steel kettle. The circulating pine nuts can greatly increase the probability of their contact with the nitrogen in the kettle, improve the heat conduction efficiency, further improve the pine nut cooling efficiency and the recovery efficiency of condensed oil, and reduce the total cost of frying pine nuts.

[0025] In summary, this application has the following advantages: 1. This application can effectively solve the problem of oil fume pollution, and the cooling effect of pine nuts is better through vacuum cooling, which shortens the post-cooling processing time and improves the overall production efficiency.

[0026] 2. This application can recycle and reuse the oil fume, which can reduce the overall production cost of roasting pine nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the stainless steel kettle in Example 1 of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the stainless steel kettle in Example 2 of the present invention.

[0030] In the figure, 1, stainless steel kettle; 10, seventh temperature detector; 11, driving motor; 12, conveying screw; 13, stainless steel casing; 131, flow channel; 132, pine nut outflow hole; 14, dispersion cap; 15, rotating rod; 16, anchor frame stirring; 2, gas input pipe; 3, condenser A; 30, condenser B; 4, U-shaped tube A; 40, U-shaped tube B; 401, fourth temperature detector; 402, fifth temperature detector; 403, sixth temperature detector; 41, first temperature detector; 42, second temperature detector; 43, third temperature detector; 44, first solenoid valve; 5, buffer tank; 6, vacuum pump; 7, condensed oil recovery tank; 8, airflow dispersion plate; 81, airflow cavity; 82, airflow output hole; 9, transfer tube; 91, second solenoid valve. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0032] Example 1, reference Figure 1 A post-processing system for roasting pine nuts includes a stainless steel kettle 1, a gas input pipe 2, a condenser A3, a U-shaped tube A4, a buffer tank 5, a vacuum pump 6 and a condensed oil recovery tank 7. The bottom side wall of the stainless steel kettle 1 is sealed and hinged with a sealed hatch for discharging pine nuts after cooling and post-processing. The top of the stainless steel kettle 1 is sealed and hinged with a feed hatch. One end of the gas input pipe 2 is fixedly connected to the bottom side wall of the stainless steel kettle 1, and the other end is connected to a nitrogen storage tank. A pulse valve 21 is fixedly connected to the gas input pipe 2, and nitrogen is pulsed into the stainless steel kettle 1 to improve the overall pine nut cooling efficiency. The top of the stainless steel kettle 1 is fixedly connected to the input end of the condenser A3 through a pipeline, and the output end of the condenser A3 is connected to the U-shaped tube A4. The cooling medium is input into the bottom of the condenser A3, and the heat exchange medium is output from the top of the condenser A3. One end of the U-shaped tube A4 is connected to the output end of the condenser A3, and the other end of the U-shaped tube A4 is connected to the buffer tank 5. The top of the buffer tank 5 is fixedly connected to the exhaust port of the vacuum pump 6 through a pipeline. The bottom of the U-shaped tube A4 is fixedly connected to the top of the condensed oil recovery tank 7 through a pipeline.

[0033] Reference Figure 1 and Figure 2, the bottom of the stainless steel kettle 1 is fixedly connected with an airflow dispersion plate 8 connected to the gas input pipe 2, and the diameter of the airflow dispersion plate 8 is equal to the inner diameter of the stainless steel kettle 1. The airflow dispersion plate 8 is integrally processed to form an airflow cavity 81 connected to the gas input pipe 2. A plurality of airflow output holes 82 connected to the airflow cavity 81 are vertically opened on the upper surface of the airflow dispersion plate 8, and the central axis of the airflow output hole 82 is parallel to the central axis of the stainless steel kettle 1. The aperture requirement of the airflow output hole 82 in the airflow dispersion plate 8 must be smaller than the diameter of the pine nuts. The actual particle size of the A-grade pine nuts after screening is ≥10mm, and the particle size of the C-grade pine nuts is 4-6mm. Therefore, it is appropriate to control the aperture of the airflow output hole 82 to 1-3mm. The aperture of the airflow output hole 82 in the prototype is 2mm, and the processing and punching are relatively convenient, which can reduce the production cost of the post-processing system for roasting pine nuts. The sum of the aperture areas of all airflow output holes 82 is equal to 20-35% of the upper surface area of ​​the flow dispersion disk 8, that is, the opening rate of the upper surface of the flow dispersion disk 8 is 20-35%. The opening rate of the upper surface of the flow dispersion disk 8 in the prototype is 25%.

[0034] Reference Figure 1 The gas input into the stainless steel kettle 1 through the gas input pipe 2 is low-temperature 4N nitrogen. Using low-temperature 4N nitrogen as supplementary gas can ensure the quality of condensed and recovered oil. When the stainless steel kettle 1 is vacuuming and cooling the pine nuts, the pressure inside the kettle is preferably controlled at 0.02-0.04MPa. In the actual operation process, the pressure inside the kettle is controlled at 0.028-0.030MPa, which can ensure good cooling post-processing efficiency and the taste of the fried pine nuts.

[0035] The vacuuming operation of the stainless steel kettle 1 is as follows: first, nitrogen is introduced to exhaust the air in the stainless steel kettle 1, and then the vacuum pump 6 is turned on to evacuate the kettle until the pressure in the kettle is 0.02-0.04MPa. Subsequently, the gas input pipe 2 pulses nitrogen into the stainless steel kettle 1. It is necessary to adjust the nitrogen input amount of the gas input pipe 2 and the air extraction amount of the vacuum pump 6 so that the nitrogen input amount of the gas input pipe 2 is equal to the air extraction amount of the vacuum pump 6, and the kettle pressure of the stainless steel kettle 1 is maintained at 0.02-0.04MPa, so that the pine nuts can be efficiently cooled and post-processed while ensuring the taste of the fried pine nuts.

[0036] Reference Figure 1 In order to improve the recovery efficiency of condensed oil, the first temperature detector 41 is fixedly connected to the pipe section connecting the U-shaped tube A4 and the output end of the condenser A3. The second temperature detector 42 and the first battery valve 44 are fixedly connected to the pipe section connecting the U-shaped tube A4 and the buffer tank 5 in sequence. The third temperature detector 43 is fixedly connected to the pipe section connecting the U-shaped tube A4 and the condensed oil recovery tank 7. The temperature of the extracted oil fume can be monitored in real time by the first temperature detector 41, the second temperature detector 42, and the third temperature detector 43, which can effectively condense the oil fume and improve the recovery efficiency of the condensed oil.

[0037] Reference Figure 1 In order to further improve the condensed oil recovery efficiency, a transfer tube 9 is fixedly connected to the circumference of the pipe section connecting the third temperature detector 43 and the first solenoid valve 44. The second solenoid valve 91 is fixedly connected to the transfer tube 9. One end of the transfer tube 9 facing away from the circumference of the pipe section connecting the third temperature detector 43 and the first solenoid valve 44 is fixedly connected to the condenser B30. The input end of the condenser B30 is connected to the transfer tube 9, and the output end of the condenser B30 is connected to the U-shaped tube B40. One end of the U-shaped tube B40 is connected to the output end of the condenser B30, and the other end of the U-shaped tube B40 is fixedly connected to the bottom side wall of the buffer tank 5. The bottom of the U-shaped tube B40 is fixedly connected to the condensed oil recovery tank 7 through a pipeline, which can further improve the condensed oil recovery efficiency.

[0038] When the second temperature detector 42 detects that the gas temperature of the output U-tube A4 is greater than 50°C, the first battery valve 44 is closed and the second solenoid valve 91 is opened. The gas output from the U-tube A4 enters the condenser B30 for another cooling treatment, which can further improve the condensed oil recovery efficiency. The cooling gas output from the U-tube B40 (the temperature is generally lower than 35°C) is input into the buffer tank 5 and finally extracted by the vacuum pump 6.

[0039] Reference Figure 1 The pipe section connecting the U-tube B40 and the output end of the condenser B30 is fixedly connected with a third temperature detector 401. The pipe section connecting the U-tube B40 and the buffer tank 5 is fixedly connected with a fourth temperature detector 402. The pipe section connecting the U-tube B40 and the condensed oil recovery tank 7 is fixedly connected with a sixth temperature detector 403, which can grasp the gas temperature input and output of the U-tube B40 in real time, so as to adjust the pine nut temperature of the final conveying stainless steel kettle 1, and also further improve the condensed oil recovery efficiency.

[0040] Reference Figure 1 and Figure 2 , a driving motor 11 is fixedly connected to the top of the stainless steel kettle 1. The output shaft of the driving motor 11 is coaxially fixedly connected to the conveying screw 12 through a coupling, and the central axis of the conveying screw 12 coincides with the central axis of the stainless steel kettle 1. One end of the conveying screw 12 is coaxially fixedly connected to the output shaft of the driving motor 11, and the other end of the conveying screw 12 is sealed and penetrated through the top of the stainless steel kettle 1, extending to the bottom of the stainless steel kettle 1. A gap of 20-50mm is reserved between the bottom end face of the conveying screw 12 and the upper surface of the airflow dispersion plate 8 placed on the bottom surface of the stainless steel kettle 1, and the gap distance is 40mm in the prototype.

[0041] Reference Figure 1 and Figure 2, a stainless steel sleeve 13 is fixedly connected inside the stainless steel kettle 1. The fixed connection method of the stainless steel sleeve 13 and the stainless steel kettle 1 is as follows: three connecting steel bars 130 are fixedly connected to the top of the stainless steel sleeve 13, one end of the connecting steel bar 130 is fixedly connected to the top of the stainless steel sleeve 13, and the other end is fixedly connected to the top surface of the stainless steel kettle 1, so that the stainless steel sleeve 13 is sleeved on the outside of the conveying screw 12. A flow channel 131 for pine nuts to flow is formed between the conveying screw 12 and the inside of the stainless steel sleeve 13. The gap of the flow channel 131 is 20-35mm, and the gap distance in the prototype is 30mm. A 20-50mm gap is reserved on the upper surface of the air flow dispersion plate 8 placed between the bottom of the stainless steel sleeve 13 and the bottom surface of the stainless steel kettle 1, and the gap distance in the prototype is 45mm. A number of pine nut outflow holes 132 with an aperture of 25-35mm are opened on the upper side wall of the stainless steel sleeve 13, and the aperture of the prototype is 30mm.

[0042] Reference Figure 1 and Figure 2 The middle outer wall of the stainless steel sleeve 13 is fixedly connected with a dispersion cap 14 with an inverted U-shaped cross section. The diameter of the dispersion cap 14 is equal to 0.8-0.95 times the inner diameter of the stainless steel kettle 1, and the gap between the side wall of the dispersion cap 14 and the inner wall of the stainless steel kettle 1 is larger than the pine nut particle size. The gap between the side wall of the dispersion cap 14 and the inner wall of the stainless steel kettle 1 is preferably controlled to be 30-50mm, and the gap distance in the prototype is 40mm.

[0043] refer to Figure 1 In order to facilitate real-time grasp of the temperature of the pine nuts in the stainless steel kettle 1, the stainless steel kettle 1 is fixedly connected with a seventh temperature detector 10, the sensor probe of the seventh temperature detector 10 extends to the inner bottom of the stainless steel kettle 1, and the display panel of the seventh temperature detector 10 is fixedly connected to the outer wall of the stainless steel kettle 1.

[0044] The difference between Example 2 and Example 1 is: Figure 3 , a driving motor 11 is fixedly connected to the top of the stainless steel kettle 1. The output shaft of the driving motor 11 is coaxially fixedly connected to a rotating rod 15 through a coupling, and the central axis of the rotating rod 15 coincides with the central axis of the stainless steel kettle 1. One end of the rotating rod 15 is coaxially fixedly connected to the output shaft of the driving motor 11, and the other end of the rotating rod 15 is sealed and penetrated through the top of the stainless steel kettle 1, extending to the bottom of the stainless steel kettle 1. An anchor frame type stirring paddle 16 is fixedly connected to the peripheral side of the rotating rod 15 located at the bottom of the stainless steel kettle 1. A gap of 20-50mm is reserved between the bottom of the anchor frame type stirring paddle 16 and the upper surface of the airflow dispersion disk 8 placed on the bottom surface of the stainless steel kettle 1. The gap distance in the prototype is 40mm. Through the stirring action of the anchor frame type stirring paddle 16, the contact probability between the pine nuts and the nitrogen in the kettle is increased, the heat conduction efficiency is improved, and the cooling efficiency of the pine nuts and the recovery efficiency of the condensed oil are improved.

[0045] The pine nut cooling post-treatment using the roasted pine nut post-treatment system in Example 1 is as follows: the driving motor speed is 60rpm, the pressure inside the kettle is controlled to be 0.028-0.030MPa, the pulse air intake interval is 1s, the pulse air intake duration is 0.5s, the pulse air intake is 20°C nitrogen, and the roasted pine nut temperature input into the stainless steel kettle 1 is measured to be 86.7°C. The roasted pine nut temperature inside the stainless steel kettle 1 can be grasped in real time through the display screen of the seventh temperature detector 10. After vacuum treatment for 300s, the roasted pine nut temperature drops to 38.2°C.

[0046] The pine nut cooling post-treatment using the roasted pine nut post-treatment system in Example 2 is as follows: the driving motor speed is 30rpm (too fast stirring speed will cause the pine nuts to break, affecting the yield of the roasted pine nuts), the pressure in the kettle is controlled to be 0.028-0.030MPa, the pulse air intake interval is 1s, the pulse air intake duration is 0.5s, the pulse air intake is 20°C nitrogen, and the roasted pine nut temperature input into the stainless steel kettle 1 is measured to be 87.1°C. The roasted pine nut temperature inside the stainless steel kettle 1 can be grasped in real time through the display screen of the seventh temperature detector 10. After vacuum treatment for 425s, the roasted pine nut temperature drops to 39.4°C.

[0047] Compared with the existing conveyor belt mode pine nut cooling and post-processing equipment, the roasted pine nut post-processing system in Example 1 operates for 300s+20s (the time to exhaust the air in the kettle), and the temperature of the roasted pine nuts drops from 86.7°C to 38.2°C, which can effectively improve the efficiency of the pine nut cooling and post-processing. The roasted pine nut post-processing system in Example 1 operates for 420s+20s (the time to exhaust the air in the kettle), and the temperature of the roasted pine nuts drops from 87.1°C to 39.4°C, which can also effectively improve the efficiency of the pine nut cooling and post-processing. Although the efficiency of the pine nut cooling and post-processing system is lower than that of the roasted pine nut post-processing system in Example 1, it is still much greater than the efficiency of the pine nut cooling and post-processing of the existing equipment (the existing pine nut cooling and post-processing time takes 15 minutes).

[0048] In summary, the roasted pine nut post-processing system provided by the present invention can effectively solve the oil fume pollution problem, and can also condense and recycle the oil fume, thereby reducing the overall production cost of roasted pine nuts. In addition, the roasted pine nut post-processing system provided by the present invention quickly cools the roasted pine nuts by vacuuming, shortening the original roasted pine nut post-processing time of 15 minutes to 320-440 seconds, greatly improving the overall production efficiency of roasted pine nuts, which is conducive to reducing the production cost of roasted pine nuts and improving market competitiveness.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A post-processing system for roasting pine nuts, characterized in that: The invention comprises a stainless steel kettle (1), wherein the bottom side wall of the stainless steel kettle (1) is connected to a gas input pipe (2); the top of the stainless steel kettle (1) is connected to a condenser A (3); the input end of the condenser A (3) is connected to the top of the stainless steel kettle (1), and the output end of the condenser A (3) is connected to a U-shaped tube A (4); one end of the U-shaped tube A (4) is connected to the output end of the condenser A (3), and the other end of the U-shaped tube A (4) is connected to a buffer tank (5); the buffer tank (5) is connected to a vacuum pump (6); and the bottom of the U-shaped tube A (4) is connected to a condensed oil recovery tank (7).

2. The post-processing system for roasting pine nuts according to claim 1, characterized in that: The gas input pipe (2) is provided with a pulse valve (21); the bottom of the stainless steel kettle (1) is provided with an air flow dispersion plate (8), and the air flow dispersion plate (8) is connected to the gas input pipe (2).

3. A roasted pine nut post-processing system according to claim 2, characterized in that: An airflow cavity (81) connected to the gas input pipe (2) is formed inside the airflow dispersion plate (8); a plurality of airflow output holes (82) connected to the airflow cavity (81) are formed on the upper surface of the airflow dispersion plate (8); and the central axis of the airflow output hole (82) is parallel to the central axis of the stainless steel kettle (1).

4. The post-processing system for roasting pine nuts according to claim 3, characterized in that: The diameter of the airflow output hole (82) needs to be smaller than the diameter of the pine nut; the diameter of the airflow output hole (82) is 1-3 mm; the sum of the diameter areas of all the airflow output holes (82) is equal to 20-35% of the upper surface area of ​​the flow dispersion disk (8).

5. The post-processing system for roasting pine nuts according to claim 1, characterized in that: The gas input into the stainless steel kettle (1) through the gas input pipe (2) is low-temperature 4N nitrogen; the kettle pressure in the stainless steel kettle (1) is 0.02-0.04MPa; the vacuuming operation of the stainless steel kettle (1) is as follows: firstly, nitrogen is introduced to exhaust the air in the stainless steel kettle (1), and then vacuuming is performed until the kettle pressure is 0.02-0.04MPa, and the amount of nitrogen input into the gas input pipe (2) and the amount of air pumped by the vacuum pump (6) are adjusted so that the amount of nitrogen input into the gas input pipe (2) is equal to the amount of air pumped by the vacuum pump (6), and the kettle pressure of the stainless steel kettle (1) is maintained at 0.02-0.04MPa.

6. A roasted pine nut post-processing system according to claim 5, characterized in that: A first temperature detector (41) is provided on the pipe section connecting the U-shaped pipe A (4) and the output end of the condenser A (3); a second temperature detector (42) and a first battery valve (44) are provided in sequence on the pipe section connecting the U-shaped pipe A (4) and the buffer tank (5); and a third temperature detector (43) is provided on the pipe section connecting the U-shaped pipe A (4) and the condensed oil recovery tank (7).

7. A roasted pine nut post-processing system according to claim 6, characterized in that: A transfer pipe (9) is connected to the circumference of the pipe section connecting the third temperature detector (43) and the first solenoid valve (44), and a second solenoid valve (91) is provided on the transfer pipe (9); the transfer pipe (9) is connected to a condenser B (30); an input end of the condenser B (30) is connected to the transfer pipe (9), and an output end of the condenser B (30) is connected to a U-shaped pipe B (40); one end of the U-shaped pipe B (40) is connected to the output end of the condenser B (30), and the other end of the U-shaped pipe B (40) is connected to a buffer tank (5); and the bottom of the U-shaped pipe B (40) is connected to a condensed oil recovery tank (7) through a pipeline.

8. The post-processing system for roasted pine nuts according to claim 7, characterized in that: A third temperature detector (401) is provided on the pipe section connecting the U-shaped pipe B (40) and the output end of the condenser B (30); a fourth temperature detector (402) is provided on the pipe section connecting the U-shaped pipe B (40) and the buffer tank (5); and a sixth temperature detector (403) is provided on the pipe section connecting the U-shaped pipe B (40) and the condensed oil recovery tank (7).

9. The post-processing system for roasting pine nuts according to claim 2, characterized in that: The top of the stainless steel kettle (1) is fixedly connected to a driving motor (11); the output shaft of the driving motor (11) is coaxially fixedly connected to a conveying screw (12) via a coupling; one end of the conveying screw (12) is coaxially fixedly connected to the output shaft of the driving motor (11), and the other end of the conveying screw (12) passes through the top of the stainless steel kettle (1) and extends to the bottom of the stainless steel kettle (1); a space of 20-50 mm is reserved between the bottom of the conveying screw (12) and the upper surface of the airflow dispersion plate (8). A stainless steel sleeve (13) is fixedly connected to the interior of the stainless steel kettle (1); the stainless steel sleeve (13) is sleeved on the exterior of the conveying screw (12); a flow channel (131) for the flow of pine nuts is formed between the conveying screw (12) and the interior of the stainless steel sleeve (13); a gap of 20-50 mm is reserved between the bottom of the stainless steel sleeve (13) and the upper surface of the air flow dispersion plate (8); and a plurality of pine nut outflow holes (132) are opened on the upper side wall of the stainless steel sleeve (13).

10. A roasted pine nut post-processing system according to claim 9, characterized in that: A dispersion cap (14) having an inverted U-shaped cross section is fixedly connected to the outer wall of the middle portion of the stainless steel sleeve (13); the diameter of the dispersion cap (14) is equal to 0.8-0.95 times the inner diameter of the stainless steel kettle (1); and the gap between the side wall of the dispersion cap (14) and the inner wall of the stainless steel kettle (1) is larger than the diameter of the pine nut particles.

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