Precise cooling equipment for grain particle flow

Abstract

The invention provides precise cooling equipment for grain particle flow, and relates to the technical field of cereal grain cooling. According to the precise cooling equipment for the grain particle flow, heat exchange is conducted between cooling water in the heat exchange plates and rice grains outside the heat exchange plates, compared with traditional heat exchange between air and rice grains, the heat exchange efficiency is greatly improved, and based on the solid dense-phase conveying principle and the excellent flowing state achieved through the heat exchange plate sets, the material flow speed is low, and heat exchange is sufficient and uniform; the gas emission amount is extremely low, the cooling process is closed, no circulating air duct is arranged, almost zero emission is achieved, and the device is more environment-friendly; meanwhile, the material loss is low, and the process quality is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of grain cooling technology, specifically to a precision cooling equipment for grain pellet flow. Background Technology

[0002] During the processing of rice, after several milling stages, the rice temperature will be much higher than room temperature. If it is not cooled before entering the polishing stage, the rice grains will inevitably break, increasing the amount of broken rice and affecting the quality of the finished product.

[0003] Therefore, a rice cooling process is required between the rice milling and polishing processes to reduce the occurrence of rice grains bursting due to drastic changes in temperature and humidity, thus reducing broken rice. In addition, after cooling, the rice temperature during the polishing process is not too high, which is more suitable for the starch on the surface of the rice grains to gelatinize and form a shiny gelatinous film, making the rice grains look more beautiful. Therefore, setting up a large rice cooling chamber before polishing is beneficial to lower the rice temperature and reduce the amount of broken rice produced during the polishing process.

[0004] To remove bran and excess moisture from white rice, especially the excess moisture and heat in the rice grains after milling, the rice cooling process is an indispensable step in modern rice processing. Traditional rice cooling warehouses mainly utilize the flow of grains within the warehouse, allowing them to fully contact with the air to achieve cooling, moisture reduction, and drying. Specifically, the rice cooling warehouse uses a ventilation system to use room temperature air to carry away the heat and excess moisture from the surface of the rice grains, thereby achieving the effect of cooling and heat dissipation.

[0005] However, traditional rice storage facilities have long cooling times, typically requiring more than 12 hours of air cooling or more than 48 hours of natural cooling, which prolongs the grain processing cycle and affects production efficiency. In hot and humid seasons, the cooling effect is not good, and localized heating and mold growth are likely to occur. In addition, the infrastructure area is usually large, requiring a lot of manpower and resources for maintenance and management, which puts a lot of pressure on enterprises in terms of capital and operating costs. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a precision cooling equipment for grain pellet flow, which solves the problems of low rice cooling efficiency, unreliable results, and high operating costs.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A precision cooling device for grain pellet stream, comprising: a feed hopper, a discharge hopper, a cooling assembly, and a room temperature sensor; The feed hopper is installed on top of the cooling assembly, and the discharge hopper is installed at the bottom of the cooling assembly; The top of the feeding hopper is equipped with a material level radar, which is used to monitor the material level height in the grain particle flow precision cooling equipment. A discharge controller is installed at the bottom outlet of the discharge hopper. The discharge controller is used to control the opening size of the discharge port. The cooling assembly includes: a water supply assembly, a PLC controller, and several cooling chambers; Adjacent cooling chambers are connected in series, and each cooling chamber is matched with a corresponding temperature and flow control unit; The cooling chamber is equipped with several vertically extending heat exchange plates, which are arranged at intervals along the horizontal direction; each cooling chamber is equipped with a material temperature sensor at the top and bottom. The temperature and flow control unit includes: inlet and outlet water heat exchangers, temperature control heat exchangers, and flow valves; The PLC controller is electrically connected to the material level radar, the discharge controller, the temperature control heat exchanger, the flow valve, all material temperature sensors, and the room temperature sensor. The cooling water supplied by the water supply component is temperature and flow controlled by the temperature and flow control unit and then enters the heat exchange plate. The water effluent from the heat exchange plate exchanges heat with the cooling water before entering the heat exchange plate through the inlet and outlet water heat exchangers and then returns to the water supply component.

[0008] Preferably, the method of using the precision cooling equipment for grain pellet flow includes: The rice grains to be cooled are injected from the top of the feeding hopper. The PLC controller uses the material level height information monitored by the material level radar to drive the discharge controller to control the discharge speed, so that the material level height is between the high material level threshold and the low material level threshold. The cooling component starts simultaneously with the rice grain feeding. The cooling water supplied by the water supply component passes through the inlet and outlet water heat exchanger to exchange heat with the outlet water, the temperature control heat exchanger to adjust the temperature, and the flow control valve to control the flow before entering the heat exchange plate. The outlet water of the heat exchange plate returns to the water supply component after exchanging heat with the inlet water through the inlet and outlet water heat exchanger. The PLC controller uses the room temperature T monitored by the room temperature sensor and the initial temperature of the rice grains fed into the top cooling chamber monitored by the material temperature sensor. The expected temperature drop for each cooling chamber section is calculated as follows: ; Where N is the number of cooling chambers; The expected discharge temperature of the nth cooling chamber from top to bottom ; The PLC controller detects the actual discharge temperature using the sensor at the bottom of the nth cooling silo. Drive the corresponding flow valve to control the inlet water flow rate. The initial inlet water flow rate is the rated minimum flow rate. At this time, increase the inlet flow rate; Where t is the buffer temperature. ; Even when the flow valve is opened to the maximum At that time, the PLC controller drives the temperature-controlled heat exchanger to cool the inlet water until... ; At that time, the PLC controller drives the temperature-controlled heat exchanger to heat the incoming water until... .

[0009] Preferably, the buffer temperature .

[0010] Preferably, a distributor is provided below the feed inlet of the feeding hopper, which is used to evenly disperse the rice grains; The top of the feeding hopper is provided with an exhaust port, which is connected to an external dust removal pipe to draw in hot air from the top of the feeding hopper. The feed hopper has a first inspection door on the top and a second inspection door on the side wall; the first and second inspection doors are normally closed.

[0011] Preferably, the discharge hopper includes: a discharge controller, a dense phase conveying discharge cone, a support frame, a hopper wall vibrator, and a third maintenance door; The dense phase conveying discharge cone is installed on the ground by a support frame. The discharge controller is installed at the discharge port at the bottom of the dense phase conveying discharge cone. The bin wall vibrator and the third maintenance door are located on the side wall of the dense phase conveying discharge cone.

[0012] Preferably, a first positioning plate is installed on the top surface of the cooling chamber, a second positioning plate is installed on the bottom surface, and a third positioning plate is installed on the front surface; The first positioning plate, the second positioning plate, and the third positioning plate are all provided with U-shaped grooves with equal spacing for fixing the heat exchange plate; The cooling chamber has a fourth inspection door on the front and a fifth inspection door on the back. Both the fourth and fifth inspection doors are installed by latches. An air inlet is provided on the top of the cooling chamber, which is used to introduce dry air into the cooling chamber.

[0013] Preferably, the water supply assembly includes: a cold water tank and a water supply pump; The water supply pump drives the cooling water in the cold water tank to pass through the temperature and flow control unit, heat exchange plate, and inlet and outlet water heat exchanger in sequence before returning to the cold water tank.

[0014] Preferably, the heat exchange plate is provided with an inlet pipe at the bottom and an outlet pipe at the top, and has an internal flow channel, through which the inlet pipe and the outlet pipe are connected.

[0015] Preferably, the cooling chamber is provided with an inlet manifold at the bottom and an outlet manifold at the top; the inlet pipes of all heat exchange plates in the cooling chamber are connected to the inlet manifold through metal hoses, and the outlet pipes of all heat exchange plates in the cooling chamber are connected to the outlet manifold through metal hoses. The water supply pump is connected to the inlet manifold via the water supply pipe through the temperature and flow control unit; the outlet manifold is connected to the cold water tank via the drain pipe through the inlet and outlet water heat exchangers.

[0016] Preferably, an inlet water temperature sensor is installed in the inlet manifold, and an outlet water temperature sensor is installed in the outlet manifold. A discharge temperature sensor is installed at the bottom of the discharge hopper.

[0017] This invention provides a precision cooling device for grain pellet flow. Compared with the prior art, it has the following advantages: In this invention, the precision cooling equipment for grain particles exchanges heat between the cooling water inside the heat exchange plate and the rice grains outside the heat exchange plate. Compared with the traditional air-rice grain heat exchange, the heat exchange efficiency is greatly improved. Based on the solid dense phase conveying principle and the excellent flow state achieved by the heat exchange plate assembly, the material flow rate is low, and the heat exchange is sufficient and uniform. Moreover, the gas emission is extremely low, the cooling process is closed, there is no circulating air duct, and the emissions are almost zero, making it more environmentally friendly. At the same time, the material loss is low, which greatly improves the process quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the precision cooling equipment for grain particle flow in an embodiment of the present invention.

[0020] Figure 2 This is an isometric view of the grain pellet flow precision cooling equipment in an embodiment of the present invention.

[0021] Figure 3 This is a rear view of the precision cooling equipment for grain pellet flow in an embodiment of the present invention.

[0022] Figure 4 for Figure 3 Cross-sectional view of AA.

[0023] Figure 5 for Figure 1 Cross-sectional view of BB in the middle.

[0024] Figure 6 This is a schematic diagram of the internal structure of the heat exchange plate in an embodiment of the present invention.

[0025] The reference numerals in the diagram are as follows: feed hopper 10, material level radar 11, material distributor 12, exhaust port 13, first inspection door 14, second inspection door 15, discharge hopper 20, discharge controller 21, dense phase conveyor discharge cone 22, support frame 23, hopper wall vibrator 24, third inspection door 25, discharge temperature sensor 26, water supply assembly 30, water supply pipe 31, drain pipe 32, PLC controller 40, cooling hopper 50, first positioning plate 51, second positioning plate 52, third positioning plate 53, fourth inspection door 54, fifth inspection door 55, air interface 56, water inlet manifold 57, water outlet manifold 58, temperature and flow control unit 60, heat exchange plate 70, water inlet pipe 71, water outlet pipe 72, flow channel 73, protrusion 74, material temperature sensor 80, room temperature sensor 81. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This application provides a precise cooling equipment for grain pellet flow, which solves the problems of low rice cooling efficiency, unreliable results, and high operating costs.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] Example: like Figures 1-6 As shown, the present invention provides a precision cooling equipment for grain pellet flow, which includes: a feeding hopper 10, a discharging hopper 20, a cooling assembly, and a room temperature sensor 81. The feed hopper 10 is installed on top of the cooling assembly, and the discharge hopper 20 is installed at the bottom of the cooling assembly; The top of the feeding hopper 10 is equipped with a material level radar 11, which is used to monitor the material level height in the grain particle flow precision cooling equipment. The bottom outlet of the discharge hopper 20 is equipped with a discharge controller 21, which is used to control the opening size of the discharge port, thereby controlling the discharge speed.

[0030] The cooling assembly includes: a water supply assembly 30, a PLC controller 40, and several cooling chambers 50; Adjacent cooling chambers 50 are connected in series, and each cooling chamber 50 is matched with a corresponding temperature and flow control unit 60; The cooling chamber 50 is equipped with several vertically extending heat exchange plates 70, which are arranged at intervals along the horizontal direction; each cooling chamber 50 is equipped with a material temperature sensor 80 at its top and bottom. The temperature and flow control unit 60 includes: an inlet and outlet water heat exchanger, a temperature control heat exchanger, and a flow valve; The PLC controller 40 is electrically connected to the material level radar 11, the discharge controller 21, the temperature control heat exchanger, the flow valve, all material temperature sensors 80, and the room temperature sensor 81. The cooling water supplied by the water supply assembly 30 is temperature and flow controlled by the temperature and flow control unit 60 and then enters the heat exchange plate 70. The water effluent from the heat exchange plate 70 exchanges heat with the cooling water before entering the heat exchange plate 70 through the inlet and outlet water heat exchanger and then returns to the water supply assembly 30.

[0031] The method of using the precision cooling equipment for grain pellet flow includes: The rice grains to be cooled are injected from the top of the feed hopper 10. The PLC controller 40 drives the discharge controller 21 to control the discharge speed by monitoring the material level height information through the material level radar 11, so that the material level height is between the high material level threshold and the low material level threshold, the infeed and discharge flow rates are similar, and the rice grains are fed in and discharged at the same time, ensuring sufficient heat exchange time and preventing the rice grains from cooling down too quickly due to short heat exchange time, which would lead to an increase in cracking. The cooling component is started at the same time as the rice grains are fed. The cooling water supplied by the water supply component 30 passes through the inlet and outlet water heat exchanger to exchange heat with the outlet water, the temperature control heat exchanger to adjust the temperature, and the flow control valve to control the flow before entering the heat exchange plate 70. The outlet water of the heat exchange plate 70 returns to the water supply component 30 after exchanging heat with the inlet water through the inlet and outlet water heat exchanger. The PLC controller 40 monitors the room temperature T via the room temperature sensor 81 and the initial temperature of the fed rice grains via the top material temperature sensor 80 in the top cooling chamber 50. The expected cooling value for each cooling chamber section (50) is calculated as follows: ; Where N is the number of cooling chambers 50; The expected discharge temperature of the nth cooling chamber 50 from top to bottom ; The PLC controller detects the actual discharge temperature through the sensor at the bottom of the nth cooling chamber 50. Drive the corresponding flow valve to control the inlet water flow rate. The initial inlet water flow rate is the rated minimum flow rate. At this time, increase the inlet flow rate; Where t is the buffer temperature. ; Even when the flow valve is opened to the maximum At that time, the PLC controller drives the temperature-controlled heat exchanger to cool the inlet water until... ; At that time, the PLC controller drives the temperature-controlled heat exchanger to heat the incoming water until... ; Since the effect of adjusting the temperature and flow rate of the inlet water on the cooling of the rice grains takes some time to respond, a buffer temperature t is set to prevent excessive adjustment of the temperature and flow rate of the inlet water. The minimum rated flow rate of the inlet and outlet water heat exchangers and flow valves are set to prevent the temperature difference between the rice grains and the bottom of the heat exchange plate 70 from being too large due to the low inlet water temperature, which could cause the rice grains to burst.

[0032] like Figure 1 As shown, a distributor 12 is provided below the feed inlet of the feeding hopper 10. The distributor 12 is used to evenly disperse the rice grains and prevent the material from accumulating.

[0033] like Figure 1 , Figure 2 As shown, the top of the feeding hopper 10 is provided with an exhaust port 13, which is connected to an external dust removal pipe to draw in hot air from the top of the feeding hopper 10 and reduce the possible condensation due to temperature difference at the top of the hopper.

[0034] like Figure 1 , Figure 2 As shown, the top of the feeding hopper 10 is provided with a first inspection door 14 and the side wall is provided with a second inspection door 15. The first inspection door 14 and the second inspection door 15 are normally closed. When the first inspection door 14 and / or the second inspection door 15 are opened, the material distribution of the material distributor 12 can be observed, and the top of the hopper can also be cleaned.

[0035] like Figures 1-4 As shown, the discharge hopper 20 includes: a discharge controller 21, a dense phase conveying discharge cone 22, a support frame 23, a hopper wall vibrator 24, and a third maintenance door 25; The dense phase conveying discharge cone 22 is installed on the ground via a support frame 23. The discharge controller 21 is installed at the discharge port at the bottom of the dense phase conveying discharge cone 22. The bin wall vibrator 24 and the third maintenance door 25 are installed on the side wall of the dense phase conveying discharge cone 22. The bin wall vibrator 24 is used to vibrate the material to prevent material blockage and bridging and to improve material flowability. The third maintenance door 25 is used for cleaning and maintenance inside the dense phase conveying discharge cone 22.

[0036] like Figures 1-4 As shown, the feed hopper 10 and the cooling hopper 50, adjacent cooling hoppers 50, and the cooling hopper 50 and the discharge hopper 20 are all connected by flanges.

[0037] like Figures 1-5 As shown, a first positioning plate 51 is installed on the top surface of the cooling chamber 50, a second positioning plate 52 is installed on the bottom surface, and a third positioning plate 53 is installed on the front surface. The first positioning plate 51, the second positioning plate 52 and the third positioning plate 53 are all provided with U-shaped grooves with equal spacing for fixing the heat exchange plate 70.

[0038] like Figures 1-4 As shown, the cooling chamber 50 is provided with a fourth inspection door 54 on the front and a fifth inspection door 55 on the back. Both the fourth inspection door 54 and the fifth inspection door 55 are installed by latching, which facilitates the loading and unloading of the heat exchange plate 70, observation of the chamber's interior, and cleaning of the chamber.

[0039] like Figure 1 , Figure 3 As shown, the top of the cooling chamber 50 is provided with an air interface 56, which is used to introduce dry air into the cooling chamber 50 to prevent the plates from fogging and the materials from clumping.

[0040] The water supply assembly 30 includes: a cold water tank and a water supply pump; The water supply pump drives the cooling water in the cold water tank to pass through the temperature and flow control unit 60, the heat exchange plate 70, and the inlet and outlet water heat exchanger before returning to the cold water tank.

[0041] like Figure 6 As shown, the heat exchange plate 70 is provided with a water inlet pipe 71 at the bottom and a water outlet pipe 72 at the top, and a flow channel 73 is opened inside, with the water inlet pipe 71 and the water outlet pipe 72 connected through the flow channel 73.

[0042] like Figure 6 As shown, the outer wall of the heat exchange plate 70 is provided with a number of protrusions 74, which are used to improve the heat exchange efficiency between the cooling water inside the heat exchange plate 70 and the rice grains outside the heat exchange plate 70.

[0043] like Figures 1-5 As shown, the bottom of the cooling chamber 50 is provided with a water inlet manifold 57 and the top is provided with a water outlet manifold 58; the water inlet pipes 71 of all heat exchange plates 70 in the cooling chamber 50 are connected to the water inlet manifold 57 through metal hoses, and the water outlet pipes 72 of all heat exchange plates 70 in the cooling chamber 50 are connected to the water outlet manifold 58 through metal hoses. The water supply pump is connected to the inlet manifold 57 via the water supply pipe 31, the temperature and flow control unit 60, and the outlet manifold 58 is connected to the cold water tank via the drain pipe 32, the inlet and outlet water heat exchanger.

[0044] An inlet water temperature sensor is installed in the inlet manifold 57, and an outlet water temperature sensor is installed in the outlet manifold 58. The inlet water temperature sensor and the outlet water temperature sensor monitor the inlet water temperature and outlet water temperature of the corresponding cooling chamber, respectively, and are used to issue an alarm when the inlet and outlet water temperatures are abnormal due to equipment failure.

[0045] A discharge temperature sensor 26 is installed at the bottom of the discharge hopper 20. The discharge temperature sensor is used to monitor the discharge temperature of the discharge hopper 20.

[0046] In summary, compared with the prior art, the present invention has the following beneficial effects: 1. In this embodiment of the invention, the grain particle flow precision cooling equipment exchanges heat between the cooling water inside the heat exchange plate 70 and the rice grains outside the heat exchange plate 70. Compared with the traditional air-rice grain heat exchange, the heat exchange efficiency is greatly improved. Based on the solid dense phase conveying principle and the excellent flow state achieved by the heat exchange plate assembly, the material flow rate is low, and the heat exchange is sufficient and uniform. Moreover, the gas emission is extremely low, the cooling process is closed, there is no circulating air duct, and the emissions are almost zero, making it more environmentally friendly. At the same time, the material loss is low, which greatly improves the process quality.

[0047] 2. In this embodiment of the invention, the grain particle flow precision cooling equipment sets the desired discharge temperature of each cooling chamber 50 by monitoring the room temperature and the initial temperature of the fed rice grains. The desired discharge temperature serves as the base buffer temperature, providing a qualified discharge temperature range for each cooling chamber 50. The PLC controller 40, through the material temperature sensor 80 at the bottom of the cooling chamber 50, obtains the discharge temperature of the cooling chamber and drives the temperature and flow control unit 60 to intelligently regulate the inlet flow and temperature of the cooling water, thereby achieving intelligent control of rice grain cooling and effectively preventing excessive regulation of the cooling water flow and temperature.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precision cooling device for grain pellet flow, characterized in that, The precision cooling equipment for grain pellet flow includes: a feed hopper (10), a discharge hopper (20), a cooling assembly, and a room temperature sensor (81). The feed hopper (10) is installed on top of the cooling assembly, and the discharge hopper (20) is installed at the bottom of the cooling assembly; The top of the feeding hopper (10) is equipped with a material level radar (11), which is used to monitor the material level height in the grain particle flow precision cooling equipment. The bottom outlet of the discharge hopper (20) is equipped with a discharge controller (21), which is used to control the opening size of the discharge port; The cooling assembly includes: a water supply assembly (30), a PLC controller (40), and several cooling chambers (50); Adjacent cooling chambers (50) are connected in series, and each cooling chamber (50) is matched with a corresponding temperature and flow control unit (60). The cooling chamber (50) is equipped with several vertically extending heat exchange plates (70), which are arranged at intervals along the horizontal direction; each cooling chamber (50) is equipped with a material temperature sensor (80) at the top and bottom. The temperature and flow control unit (60) includes: inlet and outlet water heat exchangers, temperature control heat exchangers, and flow valves; The PLC controller (40) is electrically connected to the material level radar (11), the discharge controller (21), the temperature control heat exchanger, the flow valve, all material temperature sensors (80) and the room temperature sensor (81); The cooling water supplied by the water supply component (30) is controlled by the temperature and flow control unit (60) and then enters the heat exchange plate (70). The water outlet of the heat exchange plate (70) exchanges heat with the cooling water before entering the heat exchange plate (70) through the inlet and outlet water heat exchanger and then returns to the water supply component (30).

2. The precision cooling equipment for grain pellet flow as described in claim 1, characterized in that, The method of using the precision cooling equipment for grain pellet flow includes: The rice grains to be cooled are injected from the top of the feed hopper (10). The PLC controller (40) uses the material level height information monitored by the material level radar (11) to drive the discharge controller (21) to control the discharge speed, so that the material level height is between the high threshold and the low threshold. The cooling component is started at the same time as the rice grains are fed. The cooling water provided by the water supply component (30) passes through the inlet and outlet water heat exchanger to exchange heat with the outlet water, the temperature control heat exchanger to adjust the temperature, and the flow control valve to control the flow before entering the heat exchange plate (70). The outlet water of the heat exchange plate (70) passes through the inlet and outlet water heat exchanger to exchange heat with the inlet water before returning to the water supply component (30). The PLC controller (40) monitors the room temperature T via the room temperature sensor (81) and the initial temperature of the fed rice grains via the top material temperature sensor (80) of the top cooling chamber (50). The expected temperature drop for each cooling chamber (50) is calculated as follows: ； Where N is the number of cooling chambers (50); The expected discharge temperature of the nth cooling chamber (50) counting from top to bottom ; The PLC controller detects the actual discharge temperature through the sensor at the bottom of the nth cooling chamber (50). Drive the corresponding flow valve to control the inlet water flow rate. The initial inlet water flow rate is the rated minimum flow rate. At this time, increase the inlet flow rate; Where t is the buffer temperature. ; Even when the flow valve is opened to the maximum At that time, the PLC controller drives the temperature-controlled heat exchanger to cool the inlet water until... ; At that time, the PLC controller drives the temperature-controlled heat exchanger to heat the incoming water until... .

3. The precision cooling equipment for grain pellet flow as described in claim 2, characterized in that, The buffer temperature .

4. The precision cooling equipment for grain pellet flow as described in claim 1, characterized in that, A feeder (12) is provided below the feed inlet of the feed hopper (10), and the feeder (12) is used to evenly disperse the rice grains. The top of the feed hopper (10) is provided with an exhaust port (13), which is connected to an external dust removal pipe and is used to draw in hot air from the top of the feed hopper (10). The feed hopper (10) has a first inspection door (14) on the top and a second inspection door (15) on the side wall; the first inspection door (14) and the second inspection door (15) are normally closed.

5. The precision cooling equipment for grain pellet flow as described in claim 1, characterized in that, The discharge hopper (20) includes: a discharge controller (21), a dense phase conveying discharge cone (22), a support frame (23), a hopper wall vibrator (24), and a third inspection door (25); The dense phase conveying discharge cone (22) is installed on the ground by a support frame (23), the discharge controller (21) is installed at the discharge port at the bottom of the dense phase conveying discharge cone (22), and the bin wall vibrator (24) and the third maintenance door (25) are set on the side wall of the dense phase conveying discharge cone (22).

6. The precision cooling equipment for grain pellet flow as described in claim 1, characterized in that, The cooling chamber (50) has a first positioning plate (51) installed on the top surface, a second positioning plate (52) installed on the bottom surface, and a third positioning plate (53) installed on the front surface. The first positioning plate (51), the second positioning plate (52) and the third positioning plate (53) are all provided with U-shaped grooves with equal spacing for fixing the heat exchange plate (70). The cooling chamber (50) is provided with a fourth inspection door (54) on the front and a fifth inspection door (55) on the back. Both the fourth inspection door (54) and the fifth inspection door (55) are installed by fastening with buckles. The cooling chamber (50) is provided with an air inlet (56) at the top, which is used to introduce dry air into the cooling chamber (50).

7. The precision cooling equipment for grain pellet flow as described in claim 1, characterized in that, The water supply assembly (30) includes: a cold water tank and a water supply pump; The water supply pump drives the cooling water in the cold water tank to pass through the temperature and flow control unit (60), the heat exchange plate (70), and the inlet and outlet water heat exchanger before returning to the cold water tank.

8. The precision cooling equipment for grain pellet flow as described in claim 7, characterized in that, The heat exchange plate (70) is provided with an inlet pipe (71) at the bottom and an outlet pipe (72) at the top, and has a flow channel (73) inside. The inlet pipe (71) and the outlet pipe (72) are connected through the flow channel (73).

9. The precision cooling equipment for grain pellet flow as described in claim 8, characterized in that, The cooling chamber (50) is provided with an inlet manifold (57) at the bottom and an outlet manifold (58) at the top; the inlet pipes (71) of all heat exchange plates (70) in the cooling chamber (50) are connected to the inlet manifold (57) through metal hoses, and the outlet pipes (72) of all heat exchange plates (70) in the cooling chamber (50) are connected to the outlet manifold (58) through metal hoses; The water supply pump is connected to the inlet manifold (57) via the water supply pipe (31) and the temperature and flow control unit (60); the outlet manifold (58) is connected to the cold water tank via the drain pipe (32) and the inlet and outlet water heat exchanger.

10. The precision cooling equipment for grain pellet flow as described in claim 9, characterized in that, An inlet water temperature sensor is installed inside the inlet manifold (57), and an outlet water temperature sensor is installed inside the outlet manifold (58). A discharge temperature sensor (26) is installed at the bottom of the discharge hopper (20).

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