Energy-saving continuous production grain drying unit

Abstract

The utility model discloses an energy-saving type continuous production grain drying unit which comprises at least three drying machine drying sections which are arranged front and back at intervals, each drying machine drying section is provided with a first grain inlet and a first grain outlet, each drying machine drying section is provided with a drying section air inlet and a drying section air outlet, each drying section air inlet is provided with an air inlet channel, and each drying section air outlet is provided with an air outlet channel. The drying section air outlets are provided with air outlet channels, a heating device and a fan are arranged between every two adjacent drying sections of the drying machine, the drying sections of the drying machine are provided with lifting devices, a conveying device is arranged between every two adjacent drying sections of the drying machine, and the air inlet channel on the rearmost side is used for receiving air conveyed by external air supply equipment. The grain feeding direction of the conveying device is opposite to the air flowing direction. Transfer of grains in the multiple drying machine drying sections is achieved through the multiple conveying devices, the grains in the drying machine drying sections are dried through the heating device and the draught fan, and the drying machine drying section located at the tail end of the grain feeding direction cools the falling dried high-temperature grains through air conveyed by external air supply equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of grain drying equipment, in particular to an energy-saving continuous production grain drying unit. Background Art

[0002] In grain dehydration operations, grain drying equipment is mostly used to dry and dehydrate high-humidity grains. There are many types of existing grain drying equipment, and the most commonly used ones are drying towers and drum dryers. The drying tower uses a hot air device to supply hot air to the inside of the tower body. After the grain is transported to the top of the tower body, the grain falls from the top of the tower body to the bottom of the tower body. During the falling process, the grain contacts the hot air to complete the drying. The drum dryer drives the grain in the drum to flip and move by the rolling of the drum. Hot air is supplied to the drum by a hot air device. During the flipping and movement, the grain contacts the hot air to complete the drying. The inventor found that most of the grain dryers in the existing technology are circulating type. The part of the dryer that provides the drying function is used as the drying section. The overall size of the drying section is relatively small. The hot air is only used once and then discharged. Therefore, multiple cycles of drying are required, resulting in low drying efficiency and high energy consumption. There is an urgent need for an energy-saving continuous production grain drying unit that can effectively dry grain and save energy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an energy-saving continuous production grain drying unit which can effectively dry grain and save energy.

[0004] In order to solve the above technical problems, the utility model comprises at least three drying sections of a dryer arranged at intervals in front and back, the upper end and the lower end of the drying section of the dryer are respectively provided with a first food inlet and a first food outlet, the drying section of the dryer is provided with a drying section air inlet and a drying section air outlet which can connect the internal and external environments, the air inlet of the drying section is provided with an air inlet duct, the air outlet of the drying section is provided with an air outlet duct, the air inlet duct of the drying section of the dryer located on the front side of the two adjacent drying sections of the dryer is provided with a heating device and a fan, the heating device and the fan can receive the air from the air outlet duct of the drying section of the dryer located on the rear side of the two adjacent drying sections of the dryer, relay heat the air and The heated air is transported toward the air inlet duct of the drying section of the dryer located on the front side. Each drying section of the dryer is provided with a lifting device capable of lifting the grain from bottom to top to the first grain inlet. A conveying device is provided between two adjacent drying sections of the dryer, which can receive the grain from the first grain outlet of the drying section of the dryer on the front side and transport the grain to the lifting device of the drying section of the dryer on the rear side. The direction in which the conveying device transports the grain is opposite to the flow direction of the air in the drying section of the dryer, the air inlet duct, the air outlet duct, the heating device and the fan. The air inlet duct of the drying section of the dryer located on the rear side is used to receive the cold air with a set flow rate delivered by an external air supply device.

[0005] After adopting the above structure, the conveying device conveys grain from front to back, and the air flows from back to front in the drying section of the dryer, the air inlet duct, the air outlet duct, the heating device, and the fan. The external air supply device delivers cold air with a certain flow rate to the air inlet duct of the drying section of the dryer located at the rear side. When the dried grain reaches the drying section of the dryer located at the rear side, the dried grain is cooled by the cold air delivered by the external air supply device. After the cold air cools the dried grain, the cold air heats up and flows through the air outlet duct to the running heating device and fan, thereby relaying the heating of the air. The heating device and fan ensure the temperature of the hot air that flows through the heating device and fan and reaches the drying section of the dryer, thereby ensuring the drying effect of the grain. The operator delivers the grain into the lifting device of the drying section of the dryer located at the front side. Grain is fed into a drying section of a dryer equipped with the lifting device via a lifting device and a first grain inlet. As the grain in the drying section of the dryer falls from the first grain inlet to the first grain outlet, it comes into contact with heated air, completing a drying operation. The dried grain then falls from the first grain outlet to a conveying device, which then transports the grain to the lifting device of the rear drying section of the adjacent dryer sections. This process continues, and the grain continues to dry continuously. When the high-temperature grain, which has undergone one or more drying operations, is located within the lifting device and the first grain inlet, heat from the grain surface gradually transfers to the interior of the grain, while moisture from the grain gradually transfers to the exterior, allowing subsequent drying operations to remove moisture from the grain and achieve slow drying. This continuous drying process and slow drying after drying not only effectively dries the grain but also achieves a combination of slow drying and slow drying. The hot air after a single drying operation is recycled and cooled using naturally cold air provided by an external air supply device, preventing the grain from losing heat and further saving energy.

[0006] Furthermore, a set gap is provided between the rear portion of the heating device and fan and the air outlet duct of the rear drying section of the two adjacent dryer sections. By providing a set gap between the rear portion of the heating device and fan and the air outlet duct, dry air is added to the hot air flowing into the heating device, fan, and dryer sections, thereby reducing the moisture content of the hot air.

[0007] Furthermore, the inner diameter of the air inlet duct is larger than the inner diameter of the air outlet duct. Of the two adjacent heating devices and fans, the heating device and fan located farther from the rearmost drying section of the dryer delivers a greater air volume than the heating device and fan located closer to the rearmost drying section. By setting the inner diameter of the air inlet duct larger than the inner diameter of the air outlet duct, the air inlet duct can effectively receive hot air from the heating device and fan or cold air from an external air supply device. The air volume of the multiple heating devices and fans gradually increases, increasing the flow rate of the hot air supplied to the dry air, thereby ensuring a drying effect on the grain and achieving efficient drying operations.

[0008] Furthermore, the air inlet is provided with a temperature sensor, which is connected to the heating device and the fan through the control of the controller. By providing the temperature sensor, the temperature of the air in the air inlet can be detected, thereby ensuring that the heating device and the fan can heat the air as needed.

[0009] Furthermore, the drying section of the dryer at the rear is equipped with a second outlet below the first outlet. This second outlet allows for targeted collection of dried and cooled grain, improving ease of use.

[0010] In summary, the utility model has the advantages of reasonable structure and efficient drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the utility model in use;

[0013] In the figure: 1. Drying section of the dryer; 11. First grain inlet; 12. First grain outlet; 13. Air inlet of the drying section; 131. Air inlet duct; 14. Air outlet of the drying section; 141. Air outlet duct; 2. Heating device and fan; 3. Lifting device; 31. Second grain inlet; 4. Conveying device; 5. Temperature sensor; 6. Second grain outlet. DETAILED DESCRIPTION

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. For ease of understanding, Figure 1 The left side is the rear side of the utility model. Figure 1 The right side is the front side of the utility model. Figure 1 The upper side is the upper side of the utility model, Figure 1 The lower side is the lower side of the present invention.

[0015] Reference Figure 1 and Figure 2The utility model includes at least three drying sections 1 of the dryer arranged in a front-to-back manner. The upper and lower ends of the drying sections 1 are respectively provided with a first grain inlet 11 and a first grain outlet 12. Each drying section 1 is provided with a drying section air inlet 13 and a drying section air outlet 14 that can connect the internal and external environments. The drying section air inlet 13 is located at the rear side of the drying section 1, and the drying section air outlet 14 is located at the front side of the drying section 1. The drying section air inlet 13 is provided with an air inlet duct 131, and the drying section air outlet 14 is provided with an air outlet duct 141. The drying section 1 receives air through the air inlet duct 131, and the air outlet duct 141 guides the air flowing out of the drying section 1. The air inlet 131 of the front drying section 1 of the adjacent dryer drying section 1 is equipped with a heater and fan 2. The heater and fan 2 receives air from the air outlet 141 of the rear drying section 1 of the adjacent dryer drying section 1, relay heats the air, and then delivers the heated air to the air inlet 131 of the front drying section 1. The front portion of the heater and fan 2 is used for air discharge, and the rear portion is used for air intake. A set gap is defined between the rear portion of the heater and fan 2 and the air outlet 141 of the rear drying section 1 of the adjacent dryer drying section 1. The size of the gap is adjusted according to actual on-site processing conditions. By providing a set gap between the rear portion of the heater and fan 2 and the air outlet 141, dry air is added to the hot air flowing into the heater and fan 2 and the dryer drying section 1, reducing the moisture content of the hot air. The heating device and the fan 2 are prior art and can be obtained from commercially available products on the market. The commercially available products can be products of Jiangsu Ruiyuan Heating Equipment Technology Co., Ltd. Of course, the following structure can also be adopted: the heating device and the fan 2 include a heating device and a fan arranged on the heating device. The rear and front parts of the heating device are respectively provided with an air inlet pipe and an air outlet pipe. The air inlet pipe is arranged corresponding to the air outlet 141 of the dryer drying section 1 located on the rear side of the two adjacent dryer drying sections 1, and the air outlet pipe is arranged corresponding to the air inlet 131 of the dryer drying section 1 located on the front side. The air inlet pipe provides stable guidance for the air flowing out of the air outlet 141 when entering the heating device, and the air outlet pipe provides stable guidance for the air heated to the set temperature flowing out of the heating device when entering the air inlet 131. The heating device includes an outer shell and an electric heating element located in the outer shell.

[0016] Reference Figure 1 and Figure 2The air inlet duct 131 of the drying section 1 of the dryer located at the rear is used to receive cold air with a set flow rate delivered by an external air supply device. The external air supply device can be a fan, and the set flow rate can be flexibly adjusted by operating the external air supply device according to the on-site conditions. The air inlet duct 131 and the air outlet duct 141 are hollow cylindrical or tubular. The inner diameter of the air inlet duct 131 is larger than the inner diameter of the air outlet duct 141. Of the two adjacent heating devices and fans 2, the heating device and fan 2 farther away from the drying section 1 of the dryer located at the rear has a greater air supply volume than the heating device and fan 2 closer to the drying section 1 of the dryer located at the rear. By setting the inner diameter of the air inlet duct 131 larger than the inner diameter of the air outlet duct 141, it is ensured that the air inlet duct 131 can effectively receive hot air from the heating device and fan 2 or cold air from the external air supply device. The air supply volume of the multiple heating devices and fans 2 gradually increases, increasing the flow rate of the hot air supplied to the dry air, thereby ensuring the drying effect of the grain and efficient drying operation.

[0017] Reference Figure 1 and Figure 2 Each drying section 1 of the dryer is provided with a lifting device 3 that can lift the grain from bottom to top to the first grain inlet 11. The lifting device 3 can be a bucket elevator or a screw elevator. A conveying device 4 that can receive the grain from the first grain outlet 12 of the dryer drying section 1 on the front side and transport the grain to the lifting device 3 of the dryer drying section 1 on the rear side is provided between two adjacent dryer drying sections 1. The conveying device 4 can be a belt conveyor. A second grain inlet 31 for receiving the grain transported from the conveying device 4 can be provided at the bottom of the lifting device 3. The second grain inlet 31 provides reliable reception for the grain transported by the conveying device 4. The direction in which the conveying device 4 transports grain is opposite to the direction of air flow in the dryer drying section 1, the air inlet duct 131, the air outlet duct 141, the heating device and the fan 2. Several conveying devices 4 transport grain in the same direction. The direction of conveying grain by the conveying device 4 is from front to back, and the direction of air flow in the drying section 1 of the dryer, the air inlet duct 131, the air outlet duct 141, the heating device and the fan 2 is from back to front. The air inlet duct 131 is provided with a temperature sensor 5, and the temperature sensor 5 is connected to the heating device and the fan 2 through the control of the controller. By providing the temperature sensor 5, the temperature of the air in the air inlet duct 131 can be detected, thereby ensuring the effect of the heating device and the fan 2 heating the air on demand. The temperature sensor 5 can also be provided in the air outlet duct 141 to further ensure the effect of the heating device and the fan 2 heating the air on demand. The drying section 1 of the dryer located at the rear side is provided with a second grain outlet 6 located below the first grain outlet 12. By providing the second grain outlet 6, the grain that has completed the drying operation can be collected in a targeted manner, thereby improving the convenience of use.

[0018] When the present invention is in use, the external air supply device delivers cold air with a certain flow rate to the air inlet duct 131 of the drying section 1 of the dryer located at the rear side. When the dried grain reaches the drying section 1 of the dryer located at the rear side, the dried grain is cooled by the cold air delivered by the external air supply device. After the cold air cools the dried grain, the cold air heats up and flows through the air outlet duct 141 to the running heating device and fan 2, thereby relaying the heating of the air. The heating device and fan 2 ensure the temperature of the hot air flowing through the heating device and fan 2 and reaching the drying section 1 of the dryer, thereby ensuring the drying effect of the grain. The operator delivers the grain into the lifting device 3 of the drying section 1 of the dryer located at the front side. The grain is fed into the drying section 1 of the dryer having the lifting device 3 through the lifting device 3 and the first grain inlet 11. As the grain in the drying section 1 of the dryer falls from the first grain inlet 11 to the first grain outlet 12, the grain comes into contact with the heated air and completes a drying operation. The dried grain falls from the first grain outlet 12 to the conveying device 4, and the conveying device 4 conveys the grain to the lifting device 3 of the drying section 1 of the dryer located at the rear side of the two adjacent drying sections 1 of the dryer. This process is repeated and the grain is dried continuously. When the high-temperature grain that has been dried once or multiple times is located at the lifting device 3 and the first grain inlet 11, the heat on the surface of the grain is slowly transferred to the interior of the grain, and at the same time, the moisture in the grain is slowly transferred to the outside of the grain, so that the moisture of the grain can be taken away during the subsequent drying operation, thereby achieving slow drying of the grain. Through such continuous drying and slow thawing after drying, not only can the grain be dried effectively, but also the functions of slow thawing and drying are achieved. The hot air after a single drying is recycled and reused, and the cold air of natural temperature provided by the external air supply equipment is used for cooling during cooling, so that the grain will not take away the heat, thereby further saving energy.

[0019] The above content is merely an example and explanation of the structure of the utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the scope of protection of the utility model.

Claims

1. Energy-saving continuous production grain drying unit, its characteristics are: The invention comprises at least three drying sections (1) of a dryer arranged at intervals in front and back, wherein the upper end and the lower end of the drying section (1) of the dryer are respectively provided with a first grain inlet (11) and a first grain outlet (12), and the drying section (1) of the dryer is provided with a drying section air inlet (13) and a drying section air outlet (14) capable of communicating with the internal environment and the external environment, wherein the drying section air inlet (13) is provided with an air inlet duct (131), and the drying section air outlet (14) is provided with an air outlet duct (141), and the air inlet duct (131) of the drying section (1) of the adjacent drying sections (1) of the dryer is provided with a heating device and a fan (2), and the heating device and the fan (2) are capable of receiving air from the air outlet duct (141) of the drying section (1) of the adjacent drying sections (1) of the dryer, and heating the air and discharging the heated air toward the drying section (1) of the dryer. The air inlet duct (131) of the drying section (1) of the dryer is located at the front side, and each drying section (1) of the dryer is provided with a lifting device (3) capable of lifting grain from bottom to top to the first grain inlet (11). A conveying device (4) is provided between two adjacent drying sections (1) of the dryer, which is capable of receiving grain from the first grain outlet (12) of the drying section (1) of the dryer at the front side and conveying the grain to the lifting device (3) of the drying section (1) of the dryer at the rear side. The direction in which the conveying device (4) conveys grain is opposite to the direction of air flow in the drying section (1), the air inlet duct (131), the air outlet duct (141), the heating device and the fan (2). The air inlet duct (131) of the drying section (1) of the dryer at the rear side is used to receive cold air with a set flow rate conveyed by an external air supply device, so as to cool the dried grain.

2. The energy-saving continuous production grain drying unit according to claim 1 is characterized in that: There is a set gap between the rear portion of the heating device and the fan (2) and the air outlet duct (141) of the drying section (1) of the dryer located at the rear side of the two adjacent drying sections (1) of the dryer.

3. The energy-saving continuous production grain drying unit according to claim 2 is characterized in that: The inner diameter of the air inlet duct (131) is larger than the inner diameter of the air outlet duct (141). The air supply volume of the heating device and the fan (2) farther from the drying section (1) of the dryer located at the rear side of the two adjacent heating devices and the fan (2) is gradually increased compared with the heating device and the fan (2) closer to the drying section (1) of the dryer located at the rear side, so as to replenish dry air.

4. The energy-saving continuous production grain drying unit according to claim 1 is characterized in that: The air inlet duct (131) is provided with a temperature sensor (5), and the temperature sensor (5) is connected to the heating device and the fan (2) through the control of the controller.

5. The energy-saving continuous production grain drying unit according to claim 1 is characterized in that: The drying section (1) of the dryer located at the rear side is provided with a second grain outlet (6) located below the first grain outlet (12).

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