Energy-saving and emission-reducing agricultural product processing technology and device

Abstract

The invention belongs to the technical field of agricultural product processing, and particularly relates to an energy-saving and emission-reducing agricultural product processing technology and device. According to the specific technical scheme, the system comprises a boiler water tank, a quick-freezing assembly and an air energy heat pump assembly, a condenser of the air energy heat pump assembly is used for heating cold water in the boiler water tank, and an evaporator of the air energy heat pump assembly is used for cooling frozen gas in the quick-freezing assembly; the quick-freezing assembly comprises an air cooling section and a quick-freezing section, the air cooling section comprises an air cooling rack main body arranged at an inlet of the quick-freezing section, a plurality of rotating drums which synchronously rotate are arranged on the air cooling rack main body side by side in the moving direction of agricultural products, and a plurality of first through holes are formed in the circumferential side walls of the rotating drums; a fixed cylinder is arranged on the inner periphery of the rotating cylinder, and a plurality of second through holes matched with the first through holes are formed in the fixed cylinder; in the circumferential direction of the fixing cylinder, the second through holes are formed in the one-fourth circumferential side wall of the fixing cylinder and located in the side, close to the quick-freezing section, of the upper end of the fixing cylinder, and low-temperature air of an outlet of the quick-freezing section and / or external air are / is introduced into the fixing cylinder. And in the rotating process of the rotating drums, air in the fixed drums flows out through the first through holes, so that the agricultural products on the rotating drums can be air-cooled, and the agricultural products can also be prevented from continuously staying in a clamping groove formed by the two rotating drums.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural product processing, and particularly relates to an energy-saving and emission-reducing agricultural product processing technology and device. Background Art

[0002] The quick-freezing processing of agricultural products is a method that rapidly cools agricultural product raw materials to below the freezing point through rapid cooling technology and stores them at a constant low temperature. This method can effectively maintain the original color, flavor, and nutritional components of agricultural products, while inhibiting the growth of microorganisms and extending the product shelf life. Quick-freezing processing can not only increase the added value of agricultural products but also effectively solve the problem of seasonal supply overstock, meeting the market's demand for high-quality agricultural products throughout the year. Quick-freezing processing has broad application prospects in the deep processing of agricultural products.

[0003] As a nutritious agricultural product, the quick-freezing processing technology of corn is particularly important. The specific processing process includes timely harvesting, peeling and removing the silk, cleaning, steaming, water cooling, quick-freezing, packaging, etc. In the existing corn processing production process, some waste heat (such as steam condensate, exhaust gas, pressure-relief steam, etc.) generated by the electric steam boiler is directly discharged, and the heat released by the condensate in the compressor assembly of the quick-freezing machine is not utilized. In order to recover and utilize this energy and avoid energy waste, the inventor has proposed an energy-saving and emission-reducing agricultural product processing technology.

[0004] In order to improve the quick-freezing efficiency of the quick-freezing component, agricultural products usually need to be air-cooled before entering the quick-freezing section after water cooling to remove the water droplets on the surface of the agricultural products and avoid the adhesion of agricultural products to the conveyor belt during quick-freezing. The existing method generally installs an additional air-cooling device between the quick-freezing component and the water cooler, which not only increases the floor area of the equipment but also increases the process treatment cost. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides an energy-saving and emission-reducing agricultural product processing technology and device.

[0006] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: an energy-saving and emission-reducing agricultural product processing device, including a boiler water tank, a quick-freezing component, and an air source heat pump component. The condenser of the air source heat pump component is used to heat the cold water in the boiler water tank, and the evaporator of the air source heat pump component is used to cool the refrigerating gas in the quick-freezing component; the quick-freezing component includes an air-cooling section and a quick-freezing section. The air-cooling section includes an air-cooling frame body arranged at the entrance of the quick-freezing section. Along the moving direction of the agricultural products, a plurality of synchronously rotating drums are arranged side by side on the air-cooling frame body. A plurality of first through holes are arranged on the circumferential side wall of the drum. A fixed cylinder is arranged inside the drum. A plurality of second through holes adapted to the first through holes are arranged on the fixed cylinder; along the circumferential direction of the fixed cylinder, the second through holes are arranged on the side wall of a quarter of the circumference of the fixed cylinder and are located on the upper end of the fixed cylinder close to the quick-freezing section. The low-temperature air at the outlet of the quick-freezing section and / or the outside air is introduced into the fixed cylinder.

[0007] Preferably, both ends of the drum are provided with connecting shafts. The connecting shafts are rotationally connected to the air-cooling frame body through bearings; an air delivery shaft is axially penetrated through the fixed cylinder. Both ends of the air delivery shaft extend out of the end cover of the fixed cylinder and are rotationally connected to the connecting shafts through bearings and are fixedly connected to the air-cooling frame body; a cavity is axially opened on the air delivery shaft. One end of the cavity is communicated with a manifold. A plurality of air delivery shafts are communicated with the manifold; a plurality of third through holes are arranged on the air delivery shaft. The third through holes are arranged on the upper end of the air delivery shaft and on the side far from the quick-freezing section.

[0008] Preferably, a drainage component is arranged at the bottom of the fixed cylinder. The drainage component includes a drainage frame body. A compression spring is arranged at the top of the drainage frame body. The other end of the compression spring is provided with a sealing block. A drainage hole adapted to the sealing block is arranged on the circumferential side wall of the fixed cylinder and at the bottom of the fixed cylinder; a floating plate is arranged inside the drainage frame body. A pull rope is fixedly arranged at the bottom of the floating plate. The other end of the pull rope is fixedly connected to the top of the sealing block; the top and bottom of the drainage frame body are communicated with the cavity of the fixed cylinder.

[0009] Preferably, the aperture of the drainage hole gradually decreases from inside to outside. A sealing edge is arranged at the end of the sealing block far from the drainage hole.

[0010] Preferably, the quick-freezing section includes a quick-freezing box. A plurality of layers of metal mesh belts are arranged in the quick-freezing box from top to bottom. The conveying directions of adjacent two layers of metal mesh belts are opposite. The agricultural products are conveyed in an S shape on the plurality of layers of metal mesh belts; at the conveying terminal of each layer of the metal mesh belt and on the inner side wall of the quick-freezing box, an inclined guide plate is arranged; a first air blower communicated with the evaporator is arranged at the top of the quick-freezing box. A second air blower is arranged at the lower part of the quick-freezing box. The second air blower is communicated with the manifold through an air delivery pipe.

[0011] Preferably, it further includes a cleaning machine, a pressure cooker and a water cooler. The cleaning machine, the pressure cooker, the water cooler and the quick-freezing assembly are sequentially arranged according to the agricultural product processing sequence. A steam boiler is arranged between the pressure cooker and the boiler water tank. The steam boiler heats the warm water in the boiler water tank to the steam state and then sends it into the pressure cooker.

[0012] Preferably, it further includes a first heat exchanger. The cold end inlet and the hot end inlet of the first heat exchanger are respectively fed with the low-temperature air and cold water coming out of the evaporator. The low-temperature air at the hot end outlet of the first heat exchanger enters the air-cooling section to air-cool the agricultural products, and the cold water at the cold end outlet of the first heat exchanger goes to the water cooler to water-cool the agricultural products.

[0013] Preferably, it further includes a waste water recovery tank and a second heat exchanger. The waste water recovery tank collects, stores and mixes the waste water from the outlet of the cleaning machine, the waste water from the outlet of the water cooler, the steam condensate generated by the pressure cooker, the pressure-reducing cooling water, the exhaust gas and the pressure-relieving gas generated by the pressure cooker. The water in the waste water recovery tank exchanges heat with the cold water in the second heat exchanger. The cooled waste water is directly discharged, and a part of the heated cold water enters the cleaning machine and another part enters the boiler water tank.

[0014] Preferably, it further includes a heat preservation water tank. The cold water enters the heat preservation water tank after heat exchange in the second heat exchanger. A part of the water at the outlet of the heat preservation water tank enters the cleaning machine and another part enters the soft water unit. The water at the outlet of the soft water unit enters the boiler water tank.

[0015] Correspondingly, the present invention also discloses an energy-saving and emission-reducing agricultural product processing process. The agricultural products are sequentially subjected to warm water cleaning at 40°C, steam cooking, water cooling, air cooling and quick freezing. The air source heat pump assembly cools the quick-freezing assembly and preheats the cooking steam. The frozen air at the outlet of the evaporator of the air source heat pump assembly exchanges heat with the cold water for water cooling and then air-cools the agricultural products. The waste heat in the waste water generated by cleaning and water cooling, the steam condensate generated by cooking, the pressure-reducing cooling water, the exhaust gas and the pressure-relieving gas is used to heat the cold water. A part of the heated cold water is used for agricultural product cleaning and another part is used for preheating the cooking steam.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Considering the usage purposes of both the steam boiler and the quick-freezing component, as well as the working process of the air-source heat pump component, an air-source heat pump component is arranged between the quick-freezing component and the boiler water tank. After heating the water in the boiler water tank to a certain temperature by the air-source heat pump component, it then enters the steam boiler to be heated to a steam state and then enters the pressure cooker. At the same time, the air-source heat pump component is used to lower the external air to the quick-freezing temperature and send it into the quick-freezing component to perform quick-freezing treatment on agricultural products. By arranging the air-source heat pump component, not only can the cold water in the boiler water tank be preheated, but also refrigerating gas can be provided for the quick-freezing section.

[0018] 2. By arranging the first heat exchanger, the cooling water entering the cooler can be cooled down, and this part of the cold quantity is obtained from the air-source heat pump component, which improves the utilization rate of the air-source heat pump component and does not require a separate cold source, thus saving energy consumption.

[0019] 3. By arranging the second heat exchanger and the waste water recovery tank, the waste heat in the waste water generated by cleaning and water cooling, the steam condensate generated by steaming, the pressure-reducing cooling water, the exhaust gas and the pressure-relieving gas is recovered, and this part of the waste heat is used to heat cold water. Part of the heated cold water is used for cleaning agricultural products, and the other part is used for preheating the steaming steam. It can not only save the energy consumption of the steam boiler, but also preheat the agricultural products that need to be steamed.

[0020] 4. Along the moving direction of the agricultural products on the air-cooling frame body, a number of synchronously rotating drums are arranged side by side. A number of first through holes are arranged on the circumferential side wall of the drum, and a fixed drum is arranged inside the drum. A number of second through holes adapted to the first through holes are arranged on the fixed drum; the second through holes are arranged on the side wall of a quarter of the circumference of the fixed drum and are located on the upper side of the fixed drum close to the quick-freezing section, and low-temperature air at the outlet of the quick-freezing section is introduced into the fixed drum. During the rotation of the drum, when the first through hole and the second through hole are aligned along the radial direction of the fixed drum, the gas in the fixed drum will flow out through the first through hole to air-cool the agricultural products on the drum. This air-cooling section can not only convey the agricultural products, but also air-cool the agricultural products. The air-cooling gas has a forward thrust on the agricultural products, avoiding the stagnation of the agricultural products and eliminating the need for manual operation, thus greatly saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the process system flow chart of the present invention;

[0022] Figure 2 is the cross-sectional view of the quick-freezing component of the present invention;

[0023] Figure 3 is the cross-sectional view of the air-cooling section of the quick-freezing component of the present invention;

[0024] Figure 4 is Figure 2 the partial structural view of A in

[0025] Figure 5 is Figure 3 the partial structure schematic diagram of B in

[0026] Figure 6 the state schematic diagram when the drainage component of the present invention drains water.

[0027] Reference signs in the drawings: cleaning machine 1, pressure cooker 2, water cooler 3, quick-freezing component 4, waste water recovery tank 5, second heat exchanger 6, heat preservation water tank 7, soft water unit 8, boiler water tank 9, steam boiler 10, condenser 11, expansion valve 12, evaporator 13, gas-liquid separator 14, compressor 15, first heat exchanger 16, quick-freezing box 17, metal mesh belt 18, guide plate 19, first air blower 20, third through hole 21, roller 22, discharging section 23, bottom plate 24, front plate 25, cross plate 26, water tank 27, water pipe 28, transmission mechanism 29, gas distribution pipe 30, connecting shaft 31, first through hole 32, rotating cylinder 33, fixed cylinder 34, second through hole 35, cavity 36, air delivery shaft 37, vertical plate 38, drainage hole 39, sealing block 40, triangular bracket 41, cylinder 42, relief hole 43, guide cylinder 44, connecting rod 45, compression spring 46, floating plate 47, sealing edge 48, pull rope 49, second air blower 50. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. If not specifically specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] Such as Figures 1 - 6As shown in the figure, the present invention discloses an energy-saving and emission-reducing agricultural product processing device, which includes a washing machine 1, a pressure steaming pot 2, a water cooler 3 and a quick-freezing component 4 arranged in sequence according to the agricultural product processing order. The washing machine 1 is used to wash agricultural products, the pressure steaming pot 2 uses high-temperature steam to steam the washed agricultural products under a certain pressure, the water cooler 3 is used to cool the steamed agricultural products with water, and the quick-freezing component 4 is used to quickly freeze the water-cooled agricultural products. After the quick-freezing is completed, the agricultural products are packaged. In this processing system, a steam boiler 10 is used to heat clean cold water to a steam state, and then the high-temperature steam is introduced into the pressure steaming pot 2. At the same time, low-temperature gas needs to be provided for the quick-freezing component 4 to quickly freeze agricultural products. Considering the usage purposes of the steam boiler 10 and the quick-freezing component 4 and the working process of the air-source heat pump component, the present application proposes to arrange an air-source heat pump component between the quick-freezing component 4 and the boiler water tank 9. After the water in the boiler water tank 9 is heated to a certain temperature by the air-source heat pump component, it enters the steam boiler 10 to be heated to a steam state and then enters the pressure steaming pot 2. At the same time, the air-source heat pump component is used to lower the external air temperature to the quick-freezing temperature (18 - 23 °C) and then send it into the quick-freezing component 4 to quickly freeze agricultural products.

[0031] Specifically, the boiler water tank 9 is connected to the condenser 11 of the air-source heat pump component. The water with a lower outlet temperature of the boiler water tank 9 enters the condenser 11 from the cold-end inlet of the condenser 11, exchanges heat with the refrigerant in the condenser 11, and then flows out from the hot-end outlet of the condenser 11 and returns to the boiler water tank 9 again, that is, the heat released by the refrigerant is used to heat the clean water in the boiler water tank 9. The quick-freezing component 4 is connected to the evaporator 13 of the air-source heat pump component. The relatively high-temperature external air enters the evaporator 13 from the hot-end inlet of the evaporator 13, exchanges heat with the refrigerant in the evaporator 13, and then flows out from the cold-end outlet of the evaporator 13 and enters the quick-freezing component 4, that is, the refrigerant absorbs heat from the external air to cool the external air.

[0032] The steam boiler 10 can be a gas boiler, a coal boiler or an electric boiler. In order to improve the steaming efficiency and save energy consumption, it is recommended to use an electric boiler.

[0033] Further, the water chiller 3 generally uses cooling water to cool the cooked agricultural products. In summer, the temperature of the cooling water indoors is generally relatively high. To improve the cooling effect of the water chiller 3, the agricultural product processing system is also provided with a first heat exchanger 16. A part of the low-temperature air at the cold end outlet of the evaporator 13 goes to the quick-freezing assembly 4, and the other part enters the first heat exchanger 16 to exchange heat with the cooling water. The cooled cooling water then enters the water chiller 3 to cool the agricultural products by water cooling. Specifically, the low-temperature air at the cold end outlet of the evaporator 13 enters the first heat exchanger 16 from the cold end inlet of the first heat exchanger 16, and after heat exchange, it is directly discharged into the environment from the hot end outlet of the first heat exchanger 16 or enters the air-cooling section of the quick-freezing assembly 4 to air-cool the water-cooled agricultural products; the cooling water enters the first heat exchanger 16 from the hot end inlet of the first heat exchanger 16, is further cooled and then discharged from the cold end outlet of the first heat exchanger 16, and then is introduced into the water chiller 3. By setting the first heat exchanger 16, the cooling water entering the cooler can be cooled down, and this part of the cold energy is obtained from the air source heat pump assembly, which improves the utilization rate of the air source heat pump assembly and does not require a separate cold source, saving energy consumption.

[0034] In this processing system, the pressure cooker 2 will generate steam condensate at about 90°C, pressure-reducing cooling water at about 60°C, and exhaust gas and pressure-relief gas at about 70 - 100°C. The existing process is to directly discharge this part of the energy, resulting in waste of heat energy. The processing system of this application utilizes this part of the heat through reasonable design to achieve the purpose of energy conservation and emission reduction. This application also provides a second heat exchanger 6 and a waste water recovery tank 5. The waste water at the outlet of the washing machine 1, the waste water at the outlet of the water chiller 3, the steam condensate generated by the pressure cooker 2, and one or several of the pressure-reducing cooling water enter the waste water recovery tank 5 for storage, and / or the exhaust gas and pressure-relief gas generated by the pressure cooker 2 enter the waste water recovery tank 5 for storage; the second heat exchanger 6 is used to exchange heat between the waste water and cold water in the waste water recovery tank 5. After the cold water is heated, a part of it enters the washing machine 1 to wash the agricultural products and preheat the agricultural products; the other part enters the steam boiler 10 to save the energy consumption of the steam boiler 10.

[0035] It should be noted that if the washing machine 1 uses normal temperature water for washing, or the temperature of the waste water discharged from the cooler is lower than 25 - 30°C (this temperature can be set according to actual needs), then the waste water recovery tank 5 only needs to recover the waste heat generated by the pressure cooker 2.

[0036] Furthermore, the processing system further includes a heat preservation water tank 7, which is arranged between the second heat exchanger 6, the cleaning machine 1 and the soft water unit 8. The clean cold water enters the heat preservation water tank 7 after being heat-exchanged by the second heat exchanger 6. The heat preservation water tank 7 is used to store and buffer the water heated by the second heat exchanger 6. The heated water can enter the cleaning machine 1 for cleaning agricultural products or enter the soft water unit 8. The water at the outlet of the soft water unit 8 enters the boiler water tank 9, and the water at the outlet of the boiler water tank 9 enters the steam boiler 10 to be heated into steam. Specifically, the clean cold water enters the second heat exchanger 6 from the cold end inlet of the second heat exchanger 6, is discharged from the hot end outlet of the second heat exchanger 6 after being heated, and then enters the heat preservation water tank 7; the waste water at the outlet of the waste water recovery tank 5 enters the second heat exchanger 6 from the hot end inlet of the second heat exchanger 6, is discharged from the cold end outlet of the second heat exchanger 6 after being cooled.

[0037] Furthermore, the air source heat pump assembly includes an evaporator 13, a gas-liquid separator 14, a compressor 15, a condenser 11, and an expansion valve 12. The evaporator 13, the gas-liquid separator 14, the compressor 15, the condenser 11, and the expansion valve 12 are connected in sequence to form a refrigerant circulation system. The refrigerant is compressed by the compressor 15 and then enters the condenser 11 from the hot end inlet of the condenser 11. After releasing heat, it is discharged from the cold end outlet of the condenser 11 and enters the expansion valve 12. The water in the boiler water tank 9 enters the condenser 11 from the cold end inlet of the condenser 11. After the water is heated, it is discharged from the hot end outlet of the condenser 11 and enters the boiler water tank 9 for storage; the refrigerant is depressurized by the expansion valve 12 and then enters the evaporator 13 from the cold end inlet of the evaporator 13. After absorbing heat, it is discharged from the hot end outlet of the evaporator 13 and enters the gas-liquid separator 14. After separating the liquid, it enters the compressor 15 again. The outside air enters the evaporator 13 from the hot end inlet of the evaporator 13. After releasing heat, it is discharged from the cold end outlet of the evaporator 13. A part of the cooled low-temperature air enters the quick-freezing machine, and the other part enters the first heat exchanger 16. The liquid separated by the gas-liquid separator 14 enters the condenser 11 again from the cold end inlet of the evaporator 13.

[0038] Furthermore, as Figures 2 - 6 shown, in order to improve the quick-freezing efficiency of the quick-freezing assembly 4, the agricultural products usually need to be air-cooled before entering the quick-freezing section after being water-cooled to remove the water droplets on the surface of the agricultural products and avoid the adhesion of the agricultural products to the conveyor belt during quick-freezing. The existing method is generally to set an additional air-cooling device between the quick-freezing assembly 4 and the water-cooling machine 3, which not only increases the floor area of the equipment but also increases the process treatment cost. The existing quick-freezing assembly 4 usually needs to set a feeding section at the entrance of the freezing section. The feeding section consists of a plurality of rotating cylinders 33. The agricultural products are placed on the feeding section, and the rotation of the plurality of rotating cylinders 33 drives the agricultural products forward and sends the agricultural products into the freezing section. Sometimes, round shaft-shaped agricultural products (such as corn) will get stuck between two rotating cylinders 33 and cannot move forward. The inventor improves the feeding section of the existing quick-freezing assembly 4 by combining air-cooling and feeding to solve the aforementioned technical problems.

[0039] Specifically, the quick-freezing component 4 includes an air-cooling section and a quick-freezing section. The air-cooling section uses external air, low-temperature air at the outlet of the quick-freezing section, or low-temperature air at the outlet of the first heat exchanger 16 to air-cool agricultural products. It is recommended to use the low-temperature air at the outlet of the quick-freezing section and the low-temperature air at the outlet of the first heat exchanger 16 to pre-cool the agricultural products in advance. The quick-freezing section uses the low-temperature air at the cold end outlet of the evaporator 13 to quick-freeze the agricultural products.

[0040] The air-cooling section includes an air-cooling frame body arranged at the inlet of the quick-freezing section. Along the moving direction of the agricultural products, a number of synchronously rotating drums 33 are arranged side by side on the air-cooling frame body. The number of drums 33 is driven to rotate by a transmission mechanism 29. The transmission mechanism 29 adopts the prior art and will not be elaborated here. The drum 33 is designed as a hollow structure. Connecting shafts 31 are arranged at both ends of the drum 33. The connecting shafts 31 are rotationally connected to the air-cooling frame body through bearings. A non-rotating fixed cylinder 34 is arranged inside the circumference of the drum 33. The fixed cylinder 34 is also designed as a hollow structure. An air delivery shaft 37 is arranged through the fixed cylinder 34 along the axis direction of the fixed cylinder 34. One end of the air delivery shaft 37 extends out of the fixed cylinder 34 and is connected to one of the connecting shafts 31 through a bearing, and is fixedly connected to one side of the air-cooling frame body at the same time. The other end of the air delivery shaft 37 extends out of the fixed cylinder 34 and is connected to the other connecting shaft 31 through a bearing, and is fixedly connected to the other side of the air-cooling frame body at the same time. A cavity is arranged along the axis direction of the air delivery shaft 37. One end of the cavity is communicated with a sub-air pipe 30. A number of air delivery shafts 37 are all communicated with the sub-air pipe 30. External air, low-temperature air at the outlet of the quick-freezing section, or low-temperature air at the outlet of the first heat exchanger 16 is sent into the sub-air pipe 30 through an air pump or a second air blower 50.

[0041] A number of first through holes 32 are arranged on the circumferential side wall of the drum 33. A number of second through holes 35 adapted to the first through holes 32 are arranged on the fixed cylinder 34. The second through holes 35 are arranged on the side wall of a quarter circumference of the fixed cylinder 34 and are located on the side of the upper end of the fixed cylinder 34 close to the quick-freezing section. A number of third through holes 21 are arranged along the axis direction of the air delivery shaft 37. The third through holes 21 are arranged at the upper end of the air delivery shaft 37 and on the side far from the quick-freezing section. The low-temperature air at the outlet of the quick-freezing section is sent into the sub-air pipe 30 through the second air blower 50. The sub-air pipe 30 distributes the gas to each air delivery shaft 37. The gas flows into the cavity of the fixed cylinder 34 through the third through holes 21. During the rotation of the drum 33, when the first through holes 32 are aligned with the second through holes 35 along the radial direction of the fixed cylinder 34, the gas in the fixed cylinder 34 will flow out through the first through holes 32 to air-cool the agricultural products on the drum 33. This air-cooling section can not only convey the agricultural products but also air-cool the agricultural products.

[0042] It should be noted that there is a clearance fit between the inner side wall of the rotary drum 33 and the outer side wall of the fixed drum 34, and the fixed drum 34 does not affect the rotation of the rotary drum 33.

[0043] In a preferred embodiment, along the circumferential direction of the rotary drum 33, a plurality of first through holes 32 are evenly arranged on the rotary drum 33. Along the circumferential direction of the fixed drum 34, a plurality of second through holes 35 are evenly arranged on the fixed drum 34 between the tangent point at the top of the fixed drum 34 and the tangent point close to the quick-freezing section, so as to prevent water from falling into its cavity from the top of the fixed drum 34. At the same time, since the second through holes 35 are arranged on the side close to the quick-freezing section, if the agricultural products are stuck between the two rotary drums 33 and keep turning but do not move forward, the gas flows out through the first and second through holes 35, generating a forward thrust on the agricultural products, and blowing the agricultural products out of the clamping groove formed by the two rotary drums 33. By reasonably setting the positions of the second through holes 35, not only can the agricultural products be air-cooled, but also the stagnation of the agricultural products can be avoided, eliminating the need for manual operation and greatly saving labor costs. By arranging the third through hole 21 above the air delivery shaft 37 and on the side far from the quick-freezing section, and staggering the second through hole 35 and the third through hole 21, a small amount of water can be prevented from entering the air delivery shaft 37 through the third through hole 21, thus affecting the normal use of the air delivery shaft 37.

[0044] Furthermore, since the water-cooled agricultural products directly enter the feeding section, some cooling water may enter the cavity of the fixed drum 34 through the first and second through holes 35. Over time, more and more cooling water will accumulate in the cavity of the fixed drum 34 and finally enter the air delivery shaft 37 through the third through hole 21, thus affecting the normal use of the air delivery shaft 37. To solve this technical problem, a drainage assembly is fixedly arranged at the bottom of the fixed drum 34. As Figures 5 - 6 shown, a water tank 27 with an upward opening is arranged on the air-cooling frame body and below a plurality of rotary drums 33. When the cooling water in the fixed drum 34 reaches a certain height (this height can be designed as needed, but must be lower than the height of the air delivery shaft 37 in the fixed drum 34), the drainage assembly can drain the cooling water in the fixed drum 34 into the water tank 27, and then drain the water in the water tank 27 through a water pipe 28.

[0045] Specifically, the drainage assembly includes a drainage frame body, a compression spring 46 is fixedly arranged on the top of the drainage frame body, a sealing block 40 is arranged at the other end of the compression spring 46, a drainage hole 39 adapted to the sealing block 40 is arranged on the circumferential side wall of the fixed cylinder 34 and at the bottom of the fixed cylinder 34, and the position of the drainage hole 39 also needs to correspond to the position of the first through hole 32; a floating plate 47 is arranged inside the drainage frame body, a pull rope 49 is fixedly arranged at the bottom of the floating plate 47, and the other end of the pull rope 49 is fixedly connected to the top of the sealing block 40; the top and lower part of the drainage frame body are connected to the cavity of the fixed cylinder 34. The diameter of the drainage hole 39 gradually decreases from the inside to the outside, and a sealing rib 48 is arranged at the end of the sealing block 40 away from the drainage hole 39.

[0046] The main body of the drainage frame includes a cylinder 42 with openings at the upper and lower ends. A triangular bracket 41 is fixedly arranged at the bottom of the cylinder 42. The triangular bracket 41 is fixedly connected to the bottom of the fixed cylinder 34. By setting the triangular bracket 41, the bottom of the drainage frame main body can be connected to the cavity of the fixed cylinder 34, so that the cooling water in the cavity of the fixed cylinder 34 can enter the cylinder 42 through the triangular bracket 41. A connecting rod 45 is arranged at the top of the cylinder 42, and a guide cylinder 44 is fixedly arranged at the lower end of the connecting rod 45. One end of the compression spring 46 is fixedly connected to the top of the guide cylinder 44, and the other end of the compression spring 46 is fixedly connected to the upper surface of the sealing block 40. By setting the guide cylinder 44, the compression spring 46 can accurately press the sealing block 40 into the drainage hole 39.

[0047] The floating plate 47 corresponds to the shape of the cylinder 42. As the height of the cooling water in the fixed cylinder 34 rises, the floating plate 47 rises in the cylinder 42 under the buoyancy of the cooling water. The floating plate 47 pulls the sealing block 40 through the pull rope 49, and continues to compress the compression spring 46. The sealing block 40 is pulled out from the drainage hole 39, and the cooling water in the fixed cylinder 34 is discharged into the water tank 27 through the drainage hole 39 and the first through hole 32. By setting the pull rope 49, the pull rope 49 has a pulling force only when the cooling water in the fixed cylinder 34 reaches a certain height, and can pull the sealing block 40. After the cooling water in the fixed cylinder 34 is discharged, the floating plate 47 has no buoyancy and falls to the bottom of the fixed cylinder 34. Under the rebound force of the compression spring 46, the sealing block 40 is pressed into the drainage hole 39. The compression spring 46 is always in a compressed state to prevent the air-cooled gas in the cavity of the fixed cylinder 34 from being discharged from the drainage hole 39.

[0048] It should be noted that the floating plate 47 is provided with a clearance hole 43 for allowing the sealing block 40 to move up and down.

[0049] Further, the quick-freezing section includes a quick-freezing box 17, in which a plurality of layers of metal mesh belts 18 are arranged from top to bottom. The conveying directions of adjacent two layers of metal mesh belts 18 are opposite. The agricultural products are conveyed in an S shape on the plurality of layers of metal mesh belts 18. At the conveying end of each layer of metal mesh belt 18 and on the inner side wall of the quick-freezing box 17, a guiding plate 19 is provided to facilitate guiding the agricultural products on the upper layer to the metal mesh belt 18 on the lower layer. At the top of the quick-freezing box 17, a first air blower 20 communicated with the evaporator 13 is provided. At the lower part of the quick-freezing box 17, a second air blower 50 is provided. The second air blower 50 is communicated with a distributing air pipe 30 through an air conveying pipe. A material conveying outlet is arranged at the lower end of the quick-freezing box 17, and a discharging section 23 is arranged outside the quick-freezing box 17. The discharging section 23 is connected with the material conveying outlet. A plurality of synchronously rotating rollers 22 are arranged side by side along the moving direction of the agricultural products in the discharging section 23, and the rollers 22 are driven by an existing transmission mechanism 29.

[0050] Further, the main body of the air-cooling rack is composed of two vertical plates 38 and a horizontal plate 26. The two vertical plates 38 are symmetrically arranged and fixedly connected with the quick-freezing box 17. The horizontal plate 26 is fixedly arranged between the two vertical plates 38. A front plate 25 is arranged at the front ends of the two vertical plates 38, and a bottom plate 24 is arranged at the bottoms of the two vertical plates 38. The lower end of the horizontal plate 26 and the two vertical plates 38, the front plate 25, the bottom plate 24 and the side wall of the quick-freezing box 17 form a box body for placing the air source heat pump assembly.

[0051] The present invention also discloses an energy-saving and emission-reducing agricultural product processing technology. The agricultural products are sequentially subjected to washing with 40°C warm water, steam cooking, water cooling, air cooling and quick freezing. The air source heat pump assembly cools the quick-freezing assembly 4 and preheats the cooking steam. The cold air at the outlet of the evaporator 13 of the air source heat pump assembly exchanges heat with the cold water for water cooling and then cools the agricultural products by air; the waste heat in the waste water generated by washing and water cooling, the steam condensate generated by cooking, the pressure-reducing cooling water, the exhaust gas and the pressure-relieving gas is used to heat the cold water. A part of the heated cold water is used for washing the agricultural products, and the other part is used for preheating the cooking steam.

[0052] The embodiments described above are only used to describe the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, variations, modifications and substitutions made by those of ordinary skill in the art to the technical solutions of the present invention shall all fall within the protection scope determined by the claims of the present invention.

Claims

1. An energy-saving and emission-reducing agricultural product processing device, characterized in that: The invention comprises a boiler water tank (9), a quick freezing component (4), and an air energy heat pump component. The condenser (11) of the air energy heat pump component is used to heat the cold water in the boiler water tank (9), and the evaporator (13) of the air energy heat pump component is used to cool the refrigerated gas in the quick freezing component (4). The quick freezing component (4) comprises an air cooling section and a quick freezing section. The air cooling section comprises an air cooling rack body arranged at the entrance of the quick freezing section. The air cooling rack body is provided with a plurality of synchronously rotating drums (33) arranged side by side along the moving direction of the agricultural products. The drums ( A plurality of first through holes (32) are arranged on the circumferential side wall of the rotating cylinder (33); a fixed cylinder (34) is arranged inside the rotating cylinder (33); and a plurality of second through holes (35) adapted to the first through holes (32) are arranged on the fixed cylinder (34); along the circumferential direction of the fixed cylinder (34), the second through holes (35) are arranged on a quarter of the circumferential side wall of the fixed cylinder (34) and are located on a side of the upper end of the fixed cylinder (34) close to the quick-freezing section, and low-temperature air at the outlet of the quick-freezing section and / or outside air are introduced into the fixed cylinder (34).

2. The energy-saving and emission-reducing agricultural product processing device according to claim 1 is characterized in that: Both ends of the rotating cylinder (33) are provided with connecting shafts (31), and the connecting shafts (31) are rotatably connected to the air cooling rack body through bearings; an air transmission shaft (37) is provided on the fixed cylinder (34) along its axial direction, and both ends of the air transmission shaft (37) extend out of the end caps of the fixed cylinder (34) and are rotatably connected to the connecting shaft (31) through bearings, and are fixedly connected to the air cooling rack body; a cavity (36) is opened along the axial direction of the air transmission shaft (37), one end of the cavity (36) is connected to the air distribution pipe (30), and a plurality of air transmission shafts (37) are connected to the air distribution pipe (30); a plurality of third through holes (21) are provided on the air transmission shaft (37), and the third through holes (21) are arranged at the upper end of the air transmission shaft (37) and away from the quick freezing section.

3. The energy-saving and emission-reducing agricultural product processing device according to claim 2 is characterized in that: A drainage component is arranged at the bottom of the fixed cylinder (34), and the drainage component comprises a drainage frame body. A compression spring (46) is arranged at the top of the drainage frame body, and a sealing block (40) is arranged at the other end of the compression spring (46). A drainage hole (39) adapted to the sealing block (40) is arranged on the circumferential side wall of the fixed cylinder (34) and located at the bottom of the fixed cylinder (34); a floating plate (47) is arranged inside the drainage frame body, and a pull rope (49) is fixedly arranged at the bottom of the floating plate (47), and the other end of the pull rope (49) is fixedly connected to the top of the sealing block (40); the top and lower part of the drainage frame body are connected to the cavity of the fixed cylinder (34).

4. The energy-saving and emission-reducing agricultural product processing device according to claim 3 is characterized in that: The diameter of the drainage hole (39) gradually decreases from the inside to the outside, and a sealing rib (48) is provided at one end of the sealing block (40) away from the drainage hole (39).

5. The energy-saving and emission-reducing agricultural product processing device according to any one of claims 1 to 4, characterized in that: The quick freezing section comprises a quick freezing box (17), wherein a plurality of metal mesh belts (18) are arranged from top to bottom in the quick freezing box (17), wherein the conveying directions of two adjacent metal mesh belts (18) are opposite, and the agricultural products are conveyed in an S-shaped manner on the plurality of metal mesh belts (18); an inclined guide plate (19) is arranged at the conveying terminal of each layer of the metal mesh belt (18) and located on the inner wall of the quick freezing box (17); a first air supply fan (20) connected to the evaporator (13) is arranged at the top of the quick freezing box (17), and a second air supply fan (50) is arranged at the bottom of the quick freezing box (17), and the second air supply fan (50) is connected to the air distribution pipe (30) through an air supply pipe.

6. The energy-saving and emission-reducing agricultural product processing device according to claim 5 is characterized by: The invention also comprises a cleaning machine (1), a pressure steamer (2) and a water cooler (3), wherein the cleaning machine (1), the pressure steamer (2), the water cooler (3) and the quick freezing assembly (4) are arranged in sequence according to the processing sequence of the agricultural products, and a steam boiler (10) is arranged between the pressure steamer (2) and the boiler water tank (9), and the steam boiler (10) is used to heat the warm water in the boiler water tank (9) to a steam state, and then the water is sent to the pressure steamer (2).

7. The energy-saving and emission-reducing agricultural product processing device according to claim 6 is characterized by: It also includes a first heat exchanger (16), wherein the cold end inlet and the hot end inlet of the first heat exchanger (16) are respectively connected to low-temperature air and cold water from the evaporator (13); the low-temperature air at the hot end outlet of the first heat exchanger (16) enters the air cooling section to cool the agricultural products; the cold water at the cold end outlet of the first heat exchanger (16) goes to the water chiller (3) to cool the agricultural products.

8. The energy-saving and emission-reducing agricultural product processing device according to claim 7 is characterized in that: It also includes a wastewater recovery tank (5) and a second heat exchanger (6). The wastewater recovery tank (5) collects, stores and mixes wastewater from the outlet of the cleaning machine (1), wastewater from the outlet of the water cooler (3), steam condensate generated by the pressure steamer (2), depressurized cooling water, exhaust gas and pressure relief gas; the water in the wastewater recovery tank (5) exchanges heat with cold water in the second heat exchanger (6), the cooled wastewater is directly discharged, and part of the heated cold water enters the cleaning machine (1), and the other part enters the boiler water tank (9).

9. The energy-saving and emission-reducing agricultural product processing device according to claim 8 is characterized by: It also includes an insulated water tank (7), wherein cold water enters the insulated water tank (7) after heat exchange in the second heat exchanger (6), a portion of the water at the outlet of the insulated water tank (7) enters the cleaning machine (1), and the other portion enters the water softening unit (8); the water at the outlet of the water softening unit (8) enters the boiler water tank (9).

10. A process corresponding to the energy-saving and emission-reducing agricultural product processing device according to any one of claims 1 to 9, characterized in that: The agricultural products are sequentially washed with 40°C warm water, steamed, water-cooled, air-cooled, and quickly frozen. The air energy heat pump component cools the quick freezing component (4) and preheats the steam for steaming. The refrigerated air at the outlet of the evaporator (13) of the air energy heat pump component is heat-exchanged with cold water for water cooling and then air-cooled to cool the agricultural products. The waste water generated by washing and water cooling, the steam condensate generated by steaming, the depressurized cooling water, and the waste heat in the exhaust and depressurized air are used to heat the cold water. Part of the heated cold water is used for washing the agricultural products, and the other part is used for preheating the steam for steaming.

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