Precise cooling equipment for grain particle flow

Abstract

The application provides grain particle flow precise cooling equipment and relates to the technical field of grain cooling. The grain particle flow precise cooling equipment exchanges heat between cooling water in the heat exchange plate and rice grains outside the heat exchange plate. Compared with traditional air and rice grain heat exchange, the heat exchange efficiency is greatly improved. Based on the solid dense phase conveying principle and the excellent flow state realized by the heat exchange plate group, the material flow rate is low, the heat exchange is sufficient and uniform, the gas emission is extremely low, the cooling process is closed, no circulating air duct is arranged, almost zero emission, more environmentally friendly, and the material loss is low, which greatly improves the process quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grain cooling, in particular to a precise cooling equipment for grain particle flow. BACKGROUND

[0002] In the processing of paddy, after several milling processes, the rice temperature is much higher than the room temperature. If the cooling process is not performed before entering the polishing process, it will inevitably cause the rice to burst, increase the broken rice, and affect the quality of the finished product.

[0003] Therefore, a rice cooling operation is needed between the rice milling and polishing processes to reduce the bursting of the rice due to the sharp change in temperature and humidity, and to reduce the broken rice. In addition, after cooling the rice, the rice temperature for polishing is not too high, which is more suitable for the gelatinization of the starch on the surface of the rice, forming a bright and shiny film, making the appearance of the rice more beautiful. Therefore, setting a larger rice cooling bin before polishing is beneficial to reducing the rice temperature and reducing the broken rice during polishing.

[0004] In order to remove the bran and excess moisture in the white rice, especially the excess moisture and temperature in the milled rice, which is released by the cooling process, it is an indispensable process in modern processing technology. The traditional rice cooling bin mainly utilizes the flow of grain in the bin to fully contact with the air to achieve the purposes of cooling, drying, and the like. Specifically, the rice cooling bin utilizes the room temperature wind through the wind net system to remove the temperature and excess moisture on the surface of the rice, thereby achieving the effect of cooling and heat dissipation.

[0005] However, the traditional rice cooling bin has a long cooling time, usually more than 12 hours of air cooling or more than 48 hours of natural cooling, which leads to the extension of the grain processing period and affects the production efficiency. In the high temperature and high humidity season, the cooling effect is not good, and local heating and mildewing may occur. Generally, a large amount of manpower and material resources are needed for maintenance and management, and the enterprise bears a great pressure on the cost of funds and operation. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a precise cooling equipment for grain particle flow, which solves the problems of low rice cooling efficiency, no guarantee of effect, and high operating cost.

[0007] To achieve the above purpose, the present application realizes the following technical scheme:

[0008] A precise cooling equipment for grain particle flow, comprising: a feeding bin, a discharging bin, a cooling assembly, and a room temperature sensor.

[0009] The feeding bin is installed on the top of the cooling assembly, and the discharging bin is installed on the bottom of the cooling assembly.

[0010] The top of the feeding bin is provided with a material level radar, which is used to monitor the material level height in the grain particle flow precise cooling equipment;

[0011] The bottom outlet of the discharging bin is provided with a discharging controller, which is used to control the opening size of the discharging port;

[0012] The cooling assembly comprises a water supply assembly, a PLC controller and a plurality of cooling bins;

[0013] The adjacent cooling bins are connected in series from top to bottom, and each cooling bin is matched with a corresponding temperature and flow control unit;

[0014] A plurality of vertically extending heat exchange plates are installed in the cooling bin, and the heat exchange plates are arranged in a horizontal direction; the top and bottom of each cooling bin are provided with a material temperature sensor;

[0015] The temperature and flow control unit comprises an inlet and outlet water heat exchanger, a temperature control heat exchanger and a flow valve;

[0016] The PLC controller is electrically connected with the material level radar, the discharging controller, the temperature control heat exchanger, the flow valve, all the material temperature sensors and the room temperature sensor;

[0017] The cooling water provided by the water supply assembly is controlled in temperature and flow by the temperature and flow control unit, and then enters the heat exchange plate; the outlet water of the heat exchange plate is exchanged with the cooling water before entering the heat exchange plate by the inlet and outlet water heat exchanger, and then returns to the water supply assembly.

[0018] Preferably, the use method of the grain particle flow precise cooling equipment comprises:

[0019] The rice grains to be cooled are injected from the top of the feeding bin, and the PLC controller drives the discharging controller to control the discharging speed according to the material level height information monitored by the material level radar, so that the material level height is located between the high threshold and the low threshold of the material level height;

[0020] The cooling assembly is started at the same time as the rice grain feeding, and the cooling water provided by the water supply assembly is exchanged with the outlet water by the inlet and outlet water heat exchanger, adjusted in temperature by the temperature control heat exchanger, controlled in flow by the flow valve, and then enters the heat exchange plate; the outlet water of the heat exchange plate is exchanged with the inlet water by the inlet and outlet water heat exchanger, and then returns to the water supply assembly;

[0021] The PLC controller obtains the expected temperature drop value of each cooling bin according to the room temperature T monitored by the room temperature sensor and the initial temperature of the feeding rice grains monitored by the top material temperature sensor of the top cooling bin;

[0022] ;

[0023] Wherein, N is the number of cooling bins;

[0024] ​Desired discharge temperature of the nth cooling bin counted from top to bottom ;

[0025] Actual discharge temperature detected by the PLC controller through the bottom sensor of the nth cooling bin Drive the corresponding flow valve to control the water inflow, and the initial water inflow is the rated minimum flow;

[0026] When the actual discharge temperature is greater than the desired discharge temperature, increase the water inflow;

[0027] Wherein t is the buffer temperature, ;

[0028] When the flow valve is opened to the maximum and the actual discharge temperature is still greater than the desired discharge temperature, The PLC controller drives the temperature control heat exchanger to cool the water inflow until ;

[0029] The PLC controller drives the temperature control heat exchanger to heat the water inflow until .

[0030] Preferably, the buffer temperature .

[0031] Preferably, a distributor is arranged below the feed inlet of the feed bin, and the distributor is used to uniformly disperse the rice grains;

[0032] An exhaust port is formed at the top of the feed bin, and the exhaust port is connected to an external dust removal pipeline for sucking away hot gas at the top of the feed bin;

[0033] A first maintenance door is formed at the top of the feed bin, and a second maintenance door is formed in the side wall; the first maintenance door and the second maintenance door are normally closed.

[0034] Preferably, the discharge bin comprises a discharge controller, a dense phase conveying discharge cone, a support frame, a wall vibrator, and a third maintenance door;

[0035] The dense phase conveying discharge cone is installed on the ground through the support frame, the discharge controller is installed at the discharge port at the bottom of the dense phase conveying discharge cone, and the wall vibrator and the third maintenance door are arranged on the side wall of the dense phase conveying discharge cone.

[0036] Preferably, a first positioning plate is installed on the top surface of the cooling bin, a second positioning plate is installed on the bottom surface, and a third positioning plate is installed on the front surface;

[0037] The first positioning plate, the second positioning plate, and the third positioning plate are all provided with equidistant U-shaped grooves for fixing the heat exchange plates;

[0038] The front of the cooling bin is provided with a fourth inspection door, and the back is provided with a fifth inspection door, and the fourth inspection door and the fifth inspection door are both installed through buckle locking.

[0039] The top of the cooling bin is provided with an air interface for introducing dry air into the cooling bin.

[0040] Preferably, the water supply assembly comprises a cold water tank and a water supply pump.

[0041] The water supply pump drives the cooling water in the cold water tank to pass through the temperature and flow control unit, the heat exchange plate and the water inlet and outlet heat exchanger in turn and return to the cold water tank.

[0042] Preferably, the bottom of the heat exchange plate is provided with a water inlet pipe, the top is provided with a water outlet pipe, and a flow channel is formed in the inside, and the water inlet pipe and the water outlet pipe are communicated through the flow channel.

[0043] Preferably, the bottom of the cooling bin is provided with a water inlet manifold, and the top is provided with a water outlet manifold; the water inlet pipes of all the heat exchange plates in the cooling bin are communicated with the water inlet manifold through metal hoses, and the water outlet pipes of all the heat exchange plates in the cooling bin are communicated with the water outlet manifold through metal hoses.

[0044] The water supply pump is communicated with the water inlet manifold through the temperature and flow control unit through the water supply pipe; and the water outlet manifold is communicated with the cold water tank through the water inlet and outlet heat exchanger through the drain pipe.

[0045] Preferably, the water inlet manifold is provided with a water inlet temperature sensor, and the water outlet manifold is provided with a water outlet temperature sensor.

[0046] The bottom of the discharge bin is provided with a discharge temperature sensor.

[0047] The present application provides a kind of grain particle flow precision cooling equipment.Compared with prior art, it has the following beneficial effects:

[0048] In the present application, the cooling water in the heat exchange plate exchanges heat with the rice outside the heat exchange plate, which greatly improves the heat exchange efficiency compared with the traditional air and rice heat exchange, and based on the solid dense phase conveying principle and the excellent flow state realized by the heat exchange plate group, the material flow rate is low, the heat exchange is sufficient and uniform;And gas emission is extremely low, the cooling process is closed, without circulating air duct, almost zero emission, more environmentally friendly;At the same time, the material loss is low, which greatly improves the process quality. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0050] Figure 1 The structure schematic diagram of the grain particle flow precision cooling equipment in the embodiment of the present application.

[0051] Figure 2 The axonometric view of the grain particle flow precision cooling equipment in the embodiment of the present application.

[0052] Figure 3 The rear view of the grain particle flow precision cooling equipment in the embodiment of the present application.

[0053] Figure 4 The Figure 3 sectional view of A-A.

[0054] Figure 5 The Figure 1 sectional view of B-B.

[0055] Figure 6 The internal structure schematic diagram of the heat exchange plate in the embodiment of the present application.

[0056] The reference signs in the drawings are set as follows: feed bin 10, level radar 11, distributor 12, exhaust port 13, first access door 14, second access door 15, discharge bin 20, discharge controller 21, dense phase conveying discharge cone 22, support frame 23, bin wall vibrator 24, third access door 25, discharge temperature sensor 26, water supply assembly 30, water supply pipe 31, drain pipe 32, PLC controller 40, cooling bin 50, first positioning plate 51, second positioning plate 52, third positioning plate 53, fourth access door 54, fifth access 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, convex point 74, material temperature sensor 80, room temperature sensor 81. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0058] 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.

[0059] 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.

[0060] Example:

[0061] 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.

[0062] 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;

[0063] 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.

[0064] 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.

[0065] The cooling assembly includes: a water supply assembly 30, a PLC controller 40, and several cooling chambers 50;

[0066] Adjacent cooling chambers 50 are connected in series, and each cooling chamber 50 is matched with a corresponding temperature and flow control unit 60;

[0067] 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.

[0068] The temperature and flow control unit 60 includes: an inlet and outlet water heat exchanger, a temperature control heat exchanger, and a flow valve;

[0069] 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.

[0070] 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.

[0071] The method of using the precision cooling equipment for grain pellet flow includes:

[0072] The rice to be cooled is injected from the top of the feeding bin 10, and the PLC controller 40 drives the discharge controller 21 to control the discharge speed according to the material level information monitored by the material level radar 11, so that the material level height is between the high threshold and the low threshold, the in-out flow is similar, the rice is in-out, the sufficient heat exchange time is ensured, and the increase of burst waist caused by short heat exchange time and rapid cooling is prevented;

[0073] The cooling assembly is started at the same time as the rice is fed, the cooling water provided by the water supply assembly 30 is sequentially heat-exchanged with the in-out water heat exchanger and the out water, adjusted in temperature by the temperature control heat exchanger, and controlled in flow by the flow valve, and then enters the heat exchange plate 70, and the out water of the heat exchange plate 70 is heat-exchanged with the in water by the in-out water heat exchanger and then returns to the water supply assembly 30;

[0074] The PLC controller 40 monitors the room temperature T monitored by the room temperature sensor 81 and the initial temperature of the feeding rice monitored by the material temperature sensor 80 at the top of the top cooling bin 50 The expected temperature drop value of each cooling bin 50 is obtained:

[0075] ;

[0076] Wherein, N is the number of cooling bins 50;

[0077] The expected discharge temperature of the nth cooling bin 50 from top to bottom ;

[0078] The actual discharge temperature detected by the PLC controller through the sensor at the bottom of the nth cooling bin 50 The corresponding flow valve is driven to control the in water flow, and the initial in water flow is the rated minimum flow;

[0079] When the actual discharge temperature is greater than the expected discharge temperature, the in water flow is increased;

[0080] Wherein t is the buffer temperature, ;

[0081] When the actual discharge temperature is less than the expected discharge temperature, the flow valve is opened to the maximum, and the actual discharge temperature is still The PLC controller drives the temperature control heat exchanger to cool the in water until ;

[0082] The PLC controller drives the temperature control heat exchanger to heat the in water until ;

[0083] Since the influence of the temperature and flow control of the in water on the cooling of the rice needs a period of time to respond, the buffer temperature t is set to prevent excessive adjustment of the temperature and flow of the in water; The rated minimum flow of the in-out water heat exchanger and the flow valve is set to prevent the temperature difference between the rice and the bottom of the heat exchange plate 70 from being too large due to the too low temperature of the in water.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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;

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] As shown in Figure 1 、 Figure 3 , the cooling bin 50 is provided with an air interface 56 at the top, which is used to introduce dry air into the cooling bin 50 to prevent the board from fogging and the material from caking.

[0094] The water supply assembly 30 comprises a cold water tank and a water supply pump.

[0095] 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 water inlet and outlet heat exchanger in sequence and then return to the cold water tank.

[0096] As shown in Figure 6 , 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 formed in the interior, and the water inlet pipe 71 and the water outlet pipe 72 are communicated through the flow channel 73.

[0097] As shown in Figure 6 , the outer wall of the heat exchange plate 70 is provided with a plurality of convex points 74, which are used to improve the heat exchange efficiency between the cooling water in the heat exchange plate 70 and the rice grains outside the heat exchange plate 70.

[0098] As shown in Figures 1-5 , the cooling bin 50 is provided with a water inlet manifold 57 at the bottom and a water outlet manifold 58 at the top; the water inlet pipe 71 of all the heat exchange plates 70 in the cooling bin 50 is communicated with the water inlet manifold 57 through a metal hose, and the water outlet pipe 72 of all the heat exchange plates 70 in the cooling bin 50 is communicated with the water outlet manifold 58 through a metal hose.

[0099] The water supply pump is communicated with the water inlet manifold 57 after passing through the temperature and flow control unit 60 through the water supply pipe 31; the water outlet manifold 58 is communicated with the cold water tank after passing through the water inlet and outlet heat exchanger through the drain pipe 32.

[0100] The water inlet manifold 57 is provided with a water inlet temperature sensor, and the water outlet manifold 58 is provided with a water outlet temperature sensor; the water inlet temperature sensor and the water outlet temperature sensor monitor the water inlet temperature and the water outlet temperature of the corresponding cooling bin respectively, and are used to issue an alarm when the water inlet and outlet temperature is abnormal due to equipment failure.

[0101] The discharge temperature sensor 26 is installed at the bottom of the discharge bin 20, which is used to monitor the discharge temperature of the discharge bin 20.

[0102] Compared with the prior art, the present application has the following beneficial effects:

[0103] 1. In the embodiment of the present application, the grain particle flow precision cooling equipment exchanges heat between the cooling water in the heat exchange plate 70 and the rice outside the heat exchange plate 70, compared with the traditional air and rice heat exchange, the heat exchange efficiency is greatly improved, and based on the solid dense phase conveying principle and the excellent flow state realized by the heat exchange plate group, the material flow rate is low, the heat exchange is sufficient and uniform; and the gas emission is extremely low, the cooling process is closed, no circulating air duct is set, almost zero emission, more environmentally friendly; at the same time, the material loss is low, which greatly improves the process quality.

[0104] 2. In the embodiment of the present application, the grain particle flow precision cooling equipment sets the expected discharge temperature of each cooling bin 50 by monitoring the room temperature and the initial temperature of the incoming rice, and provides the discharge qualified temperature range of each cooling bin 50 based on the expected discharge temperature and the buffer temperature as the amplitude, the cooling bin discharge temperature obtained by the PLC controller 40 through the cooling bin 50 bottom material temperature sensor 80 can drive the temperature and flow control unit 60 to intelligently control the cooling water inflow and temperature, realize intelligent control of rice cooling, and effectively prevent excessive regulation of cooling water flow and temperature.

[0105] It should be noted that in this text, 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. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A precision cooling device for grain pellet flow, characterized in that, The grain particle flow precision cooling equipment comprises a feeding bin (10), a discharging bin (20), a cooling assembly and a room temperature sensor (81); The feeding bin (10) is installed on the top of the cooling assembly, and the discharging bin (20) is installed on the bottom of the cooling assembly; A material level radar (11) is arranged on the top of the feeding bin (10), and the material level radar (11) is used for monitoring the material level height in the grain particle flow precision cooling equipment; A discharging controller (21) is arranged at the bottom outlet of the discharging bin (20), and the discharging controller (21) is used for controlling the opening size of the discharging outlet; The cooling assembly comprises a water supply assembly (30), a PLC controller (40) and a plurality of cooling bins (50); The adjacent cooling bins (50) are connected in series in the up-down direction, and each cooling bin (50) is matched with a corresponding temperature and flow control unit (60); A plurality of vertically extending heat exchange plates (70) are installed in the cooling bin (50), and the heat exchange plates (70) are arranged in the horizontal direction at intervals; the top and the bottom of each cooling bin (50) are provided with a material temperature sensor (80); The temperature and flow control unit (60) comprises an inlet and outlet water heat exchanger, a temperature control heat exchanger and a flow valve; The PLC controller (40) is electrically connected with the material level radar (11), the discharging controller (21), the temperature control heat exchanger, the flow valve, all the material temperature sensors (80) and the room temperature sensor (81); Cooling water provided by the water supply assembly (30) is controlled in temperature and flow by the temperature and flow control unit (60), and then enters the heat exchange plates (70); the outlet water of the heat exchange plates (70) is exchanged in heat with the cooling water before entering the heat exchange plates (70) through the inlet and outlet water heat exchanger, and then returns to the water supply assembly (30); The use method of the grain particle flow precision cooling equipment comprises the following steps: The rice grains to be cooled are injected from the top of the feeding bin (10), and the PLC controller (40) drives the discharging controller (21) to control the discharging speed according to the material level height information monitored by the material level radar (11), so that the material level height is located between the high threshold and the low threshold of the material level height; The cooling assembly is started at the same time as the rice grains are fed, the cooling water provided by the water supply assembly (30) is exchanged in heat with the outlet water through the inlet and outlet water heat exchanger, is adjusted in temperature by the temperature control heat exchanger, and then enters the heat exchange plates (70) after being controlled in flow by the flow valve; the outlet water of the heat exchange plates (70) is exchanged in heat with the inlet water through the inlet and outlet water heat exchanger, and then returns to the water supply assembly (30); The PLC controller (40) monitors the room temperature T by the room temperature sensor (81) and the initial temperature of the feed rice by the top material temperature sensor (80) of the top cooling bin (50) The expected temperature drop value of each cooling bin (50) is obtained ； Wherein, N is the number of the cooling bins (50); Desired discharge temperature of the nth cooling bin (50) counted from the top ; 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. when the water temperature is lower than the preset temperature, increasing the water inlet flow rate; where t is the temperature of the buffer, ; Flow valve open to the maximum still PLC controller drive temperature control heat exchanger to the water cooling, until ; When the temperature of the water in the water tank is lower than the set temperature, the PLC controller drives the temperature control heat exchanger to heat the water in the water tank until the temperature of the water in the water tank is higher than the set temperature. .

2. The precision grain flow chilling apparatus of claim 1, wherein, The buffer temperature .

3. The precision grain flow chilling apparatus of claim 1, wherein, A distributor (12) is arranged below the feeding port of the feeding bin (10), and the distributor (12) is used for uniformly dispersing the rice grains; An exhaust port (13) is formed on the top of the feeding bin (10), the exhaust port (13) is connected with an external dust removal pipeline, and is used for sucking away the hot gas on the top of the feeding bin (10); A first maintenance door (14) is formed on the top of the feeding bin (10), and a second maintenance door (15) is formed on the side wall; the first maintenance door (14) and the second maintenance door (15) are normally closed.

4. The precision grain flow chilling apparatus of claim 1, wherein, The discharging bin (20) comprises the discharging controller (21), a dense-phase conveying and discharging cone (22), a support frame (23), a bin wall vibrator (24) and a third maintenance door (25); The dense phase conveying and discharging cone (22) is installed on the ground through a support frame (23), the discharging controller (21) is installed at the discharging port at the bottom of the dense phase conveying and discharging cone (22), and the bin wall vibrator (24) and the third inspection door (25) are arranged on the side wall of the dense phase conveying and discharging cone (22).

5. The precision grain flow chilling apparatus of claim 1, wherein, The first positioning plate (51) is arranged on the top surface of the cooling bin (50), the second positioning plate (52) is arranged on the bottom surface, and the third positioning plate (53) is arranged on the front surface. The first positioning plate (51), the second positioning plate (52) and the third positioning plate (53) are all provided with equidistant U-shaped grooves for fixing the heat exchange plates (70). The front surface of the cooling bin (50) is provided with the fourth inspection door (54), and the back surface is provided with the fifth inspection door (55); the fourth inspection door (54) and the fifth inspection door (55) are both locked and installed through buckles. The top of the cooling bin (50) is provided with an air interface (56) for introducing dry air into the cooling bin (50).

6. The precision grain flow chilling apparatus of claim 1, wherein, The water supply assembly (30) comprises a cold water tank and a water supply pump. The cooling water in the cold water tank is driven by the water supply pump to pass through the temperature and flow control unit (60), the heat exchange plate (70) and the water inlet and outlet heat exchanger in sequence and then return to the cold water tank.

7. The precision grain flow chilling apparatus of claim 6, wherein, The bottom of the heat exchange plate (70) is provided with a water inlet pipe (71), the top is provided with a water outlet pipe (72), and the inside is provided with a flow channel (73); the water inlet pipe (71) and the water outlet pipe (72) are communicated through the flow channel (73).

8. The precision grain flow chilling apparatus of claim 7, wherein, The bottom of the cooling bin (50) is provided with a water inlet manifold (57), and the top is provided with a water outlet manifold (58); the water inlet pipe (71) of all the heat exchange plates (70) in the cooling bin (50) is communicated with the water inlet manifold (57) through a metal hose, and the water outlet pipe (72) of all the heat exchange plates (70) in the cooling bin (50) is communicated with the water outlet manifold (58) through a metal hose. The water supply pump is communicated with the water inlet manifold (57) through the temperature and flow control unit (60) through the water supply pipe (31); the water outlet manifold (58) is communicated with the cold water tank through the water inlet and outlet heat exchanger through the drain pipe (32).

9. The precision grain flow chilling apparatus of claim 8, wherein, The water inlet temperature sensor is arranged in the water inlet manifold (57), and the water outlet temperature sensor is arranged in the water outlet manifold (58). The discharging temperature sensor (26) is arranged at the bottom of the discharging bin (20).

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