A heat pump type high-humidity grain dryer

Abstract

The application discloses a heat pump type high-humidity grain dryer, which comprises a mounting frame, a heat pump, a granary, an elevator, an upper air pipe and a lower air pipe. The granary is arranged on the mounting frame, the elevator is arranged outside the granary, the feeding end of the elevator is arranged at the bottom, and the discharging end of the elevator is communicated with the top of the granary. The heat pump is arranged outside the granary, the upper air pipe and the lower air pipe are arranged in the granary, the output end of the heat pump is connected with the upper air pipe and the lower air pipe based on a fan, and the air outlets of the upper air pipe and the lower air pipe are directed to the inside of the granary. The upper air pipe and the lower air pipe are arranged in the dryer, so that the temperature of each area in the granary is the same, the heated grain is uniformly distributed in the conveying process of the granary, and the drying effect of the grain is improved.

Description

Technical Field

[0001] This invention mainly relates to the field of grain drying technology, specifically to a heat pump type high-humidity grain dryer. Background Technology

[0002] Existing high-moisture grain dryers use a high-rise grain silo to feed high-moisture grain into the silo from the top, and then dry and dehydrate the grain through hot air ducts inside the silo. Existing high-moisture silos use external fans to blow natural air into the silo to reduce moisture and temporarily store the high-moisture grain.

[0003] Because grain silos are relatively long in the vertical direction, the grain is mainly stored at the bottom of the silo. Current dryers place the hot air outlet at the bottom of the silo, resulting in a large humidity difference between the upper and lower areas. This causes inconsistent heating and drying effects on different parts of the grain, affecting the dryer's ability to dry high-moisture grains in the silo. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a heat pump type high humidity grain dryer. By setting up an upper air pipe and a lower air pipe inside the dryer, the temperature of each area inside the grain silo is the same, so that the grain is heated evenly during the grain silo transportation process, thereby improving the drying effect of the grain.

[0005] This invention provides a heat pump type high-humidity grain dryer, which includes: a mounting frame, a heat pump, a fan, a grain bin, a hoist, an upper air duct, and a lower air duct;

[0006] The grain silo is mounted on the mounting frame, the elevator is located outside the grain silo, and the inlet end of the elevator is located at the bottom, while the outlet end of the elevator is connected to the top of the grain silo.

[0007] The fan is located outside the grain silo, the upper air duct and the lower air duct are located inside the grain silo, and the output end of the heat pump is connected to the upper air duct and the lower air duct based on the fan;

[0008] The air outlets of the upper and lower air ducts face the interior of the grain silo.

[0009] Furthermore, the heat pump type high-humidity grain dryer also includes: a grain discharge funnel located at the bottom of the grain silo and a grain discharge conveyor belt located below the grain discharge funnel;

[0010] The elevator is equipped with a feed inlet and a return inlet. The feed inlet is used to input high-moisture grain, and the return inlet is used to receive grain from the discharge conveyor belt.

[0011] Furthermore, the top of the elevator is provided with a first conveying pipe and a second conveying pipe that are symmetrically distributed;

[0012] The outlets of the first and second conveying pipes are located at the top of the grain silo.

[0013] Furthermore, the first conveying pipe and the second conveying pipe are inclined pipe structures.

[0014] Furthermore, the upper air duct and the lower air duct are arranged horizontally and are parallel to each other.

[0015] Furthermore, one end of the grain discharge conveyor belt is connected to the return port of the elevator, and the other end of the grain discharge conveyor belt is set as the discharge end.

[0016] Furthermore, the return port of the elevator is equipped with a baffle.

[0017] Furthermore, a temperature sensor is installed inside the grain silo to detect the temperature inside the silo.

[0018] Furthermore, the top of the grain silo is provided with a canopy, and one side of the canopy extends outside the top of the grain silo to form an eave.

[0019] Furthermore, the upper end of the hoist is fixed to the eaves.

[0020] This invention provides a heat pump type high-humidity grain dryer. By setting up an upper air pipe and a lower air pipe inside the dryer, the temperature in all areas inside the grain silo is the same, so that the grain is heated evenly during the grain silo transportation process, thereby improving the drying effect of the grain. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the structure of a heat pump type high-humidity grain dryer in an embodiment of the present invention;

[0023] Figure 2 This is a structural cross-sectional view of the heat pump type high-humidity grain dryer in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure at the bottom of the elevator in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the top of the hoist in an embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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] Figure 1 A schematic diagram of the structure of a heat pump type high-humidity grain dryer in an embodiment of the present invention is shown; Figure 2 A cross-sectional view of the structure of a heat pump type high-humidity grain dryer in an embodiment of the present invention is shown; Figure 3 A schematic diagram of the bottom structure of the hoist 12 in an embodiment of the present invention is shown; Figure 4 A schematic diagram of the top structure of the elevator 12 in an embodiment of the present invention is shown. The heat pump type high-moisture grain dryer includes: a mounting frame 16, a heat pump 17, a fan 13, a grain silo 11, an elevator 12, an upper air duct 15, and a lower air duct 14. The grain silo 11 is mounted on the mounting frame 16, which supports the grain silo 11. The elevator 12 is located outside the grain silo 11, with its inlet end at the bottom and its outlet end connected to the top of the grain silo 11. The elevator 12 can transport high-moisture grain from the bottom to the top of the grain silo 11 and drive the high-moisture grain from the top of the grain silo 11 into the interior of the grain silo 11.

[0028] Furthermore, the grain silo 11 is provided with several ventilation holes on its side wall, so that the air inside the grain silo 11 can be discharged outside the grain silo 11, so as to realize the circulation of hot air inside the grain silo 11 and improve the effect of hot air inside the grain silo 11 on the drying treatment of high-moisture grain.

[0029] Specifically, the fan 13 is located outside the grain silo 11, while the upper air duct 15 and the lower air duct 14 are located inside the grain silo 11. The output end of the heat pump 17 is connected to the upper air duct 15 and the lower air duct 14 via the fan 13, and the air outlets of the upper air duct 15 and the lower air duct 14 face the interior of the grain silo 11. The fan 13 delivers hot air into the grain silo 11 via the upper air duct 15 and the lower air duct 14, thereby heating and drying the grain inside the grain silo 11.

[0030] Furthermore, the heat pump 17 can collect and heat the air from the external environment, and the heat pump 17 delivers the heated air to the upper air duct 15 and the lower air duct 14 through the fan 13, and drives the heated dry air to be delivered to the grain silo 11 through the upper air duct 15 and the lower air duct 14, thereby performing a heat drying operation on the grain inside the grain silo 11.

[0031] Specifically, the upper air duct 15 and the lower air duct 14 are arranged horizontally and parallel to each other. The upper air duct 15 and the lower air duct 14 are arranged horizontally along the grain silo 11, so that the upper air duct 15 and the lower air duct 14 can contact most of the space of the grain silo 11. Through the parallel arrangement of the upper air duct 15 and the lower air duct 14, that is, the upper air duct 15 and the lower air duct 14 are arranged vertically, so that the temperature difference between the upper and lower areas of the grain silo 11 is reduced, the temperature uniformity inside the grain silo 11 is improved, and the grain can be heated evenly when passing through the grain silo 11, thereby improving the efficiency and effect of grain drying and dehydration.

[0032] Furthermore, based on actual usage requirements, the upper air duct 15 and the lower air duct 14 can be provided with several parallel sub-air ducts. Through the distribution of multiple sub-air ducts, the coverage area of ​​the upper air duct 15 and the lower air duct 14 in the grain silo 11 can be expanded, resulting in better hot air drying quality in the grain silo 11 and improving the effect and quality of rapid drying and dehydration of high-moisture grains.

[0033] Specifically, the heat pump type high-moisture grain dryer further includes: a grain discharge funnel 19 disposed at the bottom of the grain silo 11 and a grain discharge conveyor belt 18 disposed below the grain discharge funnel 19. The grain discharge funnel 19 is used to transport the grain in the grain silo 11 onto the grain discharge conveyor belt 18. The bottom of the elevator 12 is provided with a feed inlet 121 and a return inlet 122. The feed inlet 121 is used to input high-moisture grain, and the return inlet 122 is used to receive the grain on the grain discharge conveyor belt 18. That is, after the grain passes through the grain discharge funnel 19 at the bottom of the grain silo 11, it falls onto the grain discharge conveyor belt 18 and is conveyed by the grain discharge conveyor belt 18 to the return inlet 122 at the bottom of the elevator 12. After being lifted and conveyed by the elevator 12, it re-enters the grain silo 11 and is circulated and dried within the grain silo 11, thereby achieving rapid drying and dehydration of the grain.

[0034] Furthermore, the feed inlet 121 of the elevator 12 is used to receive external high-moisture grain. That is, the workers put the external high-moisture grain into the elevator 12 through the feed inlet 121 of the elevator 12, and after being driven by the elevator 12, it is transported to the top of the grain silo 11 for feeding into the grain silo 11.

[0035] Specifically, the top of the elevator 12 is provided with a symmetrically distributed first conveying pipe 123 and second conveying pipe 124. The output ports of the first conveying pipe 123 and the second conveying pipe 124 are located at the top of the grain silo 11. One end of the first conveying pipe 123 and the second conveying pipe 124 is connected to the output end of the elevator 12, and the other end of the first conveying pipe 123 and the second conveying pipe 124 is inserted into the grain silo 11. After the elevator 12 conveys the grain to the top of the grain silo 11, the grain is conveyed into the grain silo 11 through the first conveying pipe 123 and the second conveying pipe 124, so that the grain can be conveyed along the top of the grain silo 11 to the grain discharge funnel 19 at the top of the grain silo 11. After being dried by the hot air discharged from the upper air pipe 15 and the lower air pipe 14 inside the grain silo 11, the grain achieves a rapid dehydration effect.

[0036] Furthermore, the first conveying pipe 123 and the second conveying pipe 124 are inclined pipe structures so that the elevator 12 can slide the grain onto the top of the grain bin 11.

[0037] Specifically, the grain discharge conveyor belt 18 is disposed inside the mounting frame 16. The grain discharge conveyor belt 18 is located below the bottom of the grain bin 11, so that the grain discharge conveyor belt 18 can receive the grain discharged from the grain bin 11 and transport the grain. One end of the grain discharge conveyor belt 18 is connected to the return port 122 of the elevator 12, and the other end of the grain discharge conveyor belt 18 is set as the discharge end. The grain discharge conveyor belt 18 includes a first sub-conveyor belt 181 and a second sub-conveyor belt 182. The elevator 12 is located in the middle of the grain bin 11. The first sub-conveyor belt 181 and the second sub-conveyor belt 182 are symmetrically distributed on both sides of the return port 122 of the elevator 12, and the conveying directions of the first sub-conveyor belt 181 and the second sub-conveyor belt 182 are opposite, so that the grain on the first sub-conveyor belt 181 and the second sub-conveyor belt 182 can be collected on the return port 122 of the elevator 12.

[0038] Furthermore, the return port 122 of the elevator 12 is equipped with a cover. When the first sub-conveyor belt 181 and the second sub-conveyor belt 182 convey grain to the return port 122 of the elevator 12, the cover is in the open state, so that the grain of the first sub-conveyor belt 181 and the second sub-conveyor belt 182 can be conveyed to the return port 122 of the elevator 12, and the grain is conveyed to the top of the grain bin 11 by the elevator 12.

[0039] Furthermore, when the moisture content of the grain discharged from the grain silo 11 reaches a preset value, the heat pump type high-moisture grain dryer can adjust the second sub-conveyor belt 182 to reverse, so that the grain discharge direction of the second sub-conveyor belt 182 is opposite, that is, the conveying direction of the first sub-conveyor belt 181 and the second sub-conveyor belt 182 is the same, and the cover of the return port 122 of the elevator 12 is in the closed state, so that the grain discharge conveyor belt 18 can transport the grain discharged from the grain silo 11 to the next processing step.

[0040] Specifically, a moisture detector is installed in the grain discharge funnel 19 of the grain silo 11. The moisture detector is used to detect the moisture content of the grain passing through the grain discharge funnel 19. According to the preset moisture detection threshold, when the moisture content of the grain in the grain silo 11 reaches the preset value, it is determined that the grain drying process in the grain silo 11 has met the preset requirements. The heat pump type high humidity grain dryer can transport the dried grain to the next processing step.

[0041] Furthermore, the moisture detection threshold of the moisture detector is set to 20%. The moisture content of the high-moisture grain received by the heat pump type high-moisture grain dryer is above 30%. The high-moisture grain is dried quickly by the heat pump type high-moisture grain dryer. That is, when the moisture content of the grain in the grain silo 11 drops by 20%, the heat pump type high-moisture grain dryer stops working and the grain is transported to the next processing step.

[0042] Specifically, a temperature sensor is installed inside the grain silo 11 to detect the temperature inside the grain silo 11. By detecting the temperature inside the grain silo 11 in real time, the heat pump type high-humidity grain dryer can adjust the operating temperature of the fan 13 according to the temperature inside the grain silo 11, thereby realizing real-time temperature control inside the grain silo 11. This ensures that the grain inside the grain silo 11 can be dehydrated and dried at a suitable temperature, improving the dehydration and drying efficiency and effect of the grain inside the grain silo 11.

[0043] Specifically, the top of the grain silo 11 is provided with a canopy, one side of which extends outside the top of the grain silo 11 to form an eave. The canopy is used to cover the top opening of the grain silo 11 to prevent dust and moisture from the external environment from entering the grain silo 11 from the top, thereby improving the drying quality of the heat pump type high humidity grain dryer.

[0044] Furthermore, the upper end of the elevator 12 is fixed to the eaves, and the portion of the canopy extending outside the grain silo 11 can provide support for the elevator 12, fix the elevator 12 to the eaves, provide connection stability between the elevator 12 and the grain silo 11, and improve the overall structural reliability of the heat pump type high-humidity grain dryer.

[0045] Specifically, the working process of the heat pump type high-moisture grain dryer is as follows: Workers or feeding equipment feed high-moisture grain into the elevator 12 through the inlet 121. The grain is then transported by the elevator 12 to the top of the grain silo 11, and falls into the grain silo 11 through the first conveying pipe 123 and the second conveying pipe 124. Grain at the bottom of the grain silo 11 falls through the discharge funnel 19 onto the discharge conveyor belt 18, which then transports the grain to the elevator. The grain on the discharge conveyor belt 18 is reloaded into the elevator 12 through the return port 122 of the elevator 12, and then transported to the top of the grain silo 11 again by the elevator 12. After passing through the first conveying pipe 123 and the second conveying pipe 124, it falls into the grain silo 11. That is, the elevator 12, the grain silo 11 and the discharge conveyor belt 18 form a circulating drying conveying route to realize the circulating drying treatment of high-moisture grain and achieve rapid drying operation of high-moisture grain.

[0046] The air conveying process of the heat pump type high-humidity grain dryer is as follows: the fan 13 draws in ambient temperature air and heats it to obtain heated dry hot air. The heated hot air is then introduced into the grain silo 11 through the upper air duct 15 and the lower air duct 14 to air dry and dehydrate the grain inside the grain silo 11. The air inside the grain silo 11 dissipates to the outside through the gaps in the walls of the grain silo 11. By setting up the upper air duct 15 and the lower air duct 14 to form a double-layer air outlet drying structure, the temperature of the upper and lower areas of the grain silo 11 is made uniform, improving the drying uniformity of the grain inside the grain silo 11, thereby improving the drying quality of high-humidity grain by the heat pump type high-humidity grain dryer.

[0047] Furthermore, the heat pump type high-humidity grain dryer can solve the problem of low dehydration efficiency of high-humidity grains caused by different moisture content in the air due to different regions, thereby ensuring the quality of grains. It can realize the temporary storage of high-humidity grains and the drying of high-humidity grains, and better solve the problem of emergency drying and temporary storage of grains under the influence of special weather conditions advocated by the state.

[0048] This invention provides a heat pump type high-humidity grain dryer. By incorporating an upper air duct 15 and a lower air duct 14 inside the dryer, the temperature in all areas of the grain silo 11 becomes uniform, ensuring even heating of the grain during transport within the silo 11. This solves the problem of slow drying due to high air moisture content entering the silo caused by regional differences, thus improving the drying effect. The high-humidity grain dryer of this invention features a large storage capacity, rapidly reducing the moisture content of grain to a safe level, ensuring that the high-humidity grain is not damaged under special weather conditions. It also solves the problem of grain storage for users under special weather conditions. It can achieve multiple uses in one machine.

[0049] Furthermore, the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A heat pump type high-humidity grain dryer, characterized in that, The heat pump type high-humidity grain dryer includes: a mounting frame, a fan, a heat pump, a grain bin, a hoist, an upper air duct, and a lower air duct; The grain silo is mounted on the mounting frame, the elevator is located outside the grain silo, and the inlet end of the elevator is located at the bottom, while the outlet end of the elevator is connected to the top of the grain silo. The fan is located outside the grain silo, the upper air duct and the lower air duct are located inside the grain silo, and the output end of the heat pump is connected to the upper air duct and the lower air duct based on the fan; The air outlets of the upper and lower air ducts face the interior of the grain warehouse; The heat pump type high-humidity grain dryer also includes: a grain discharge funnel set at the bottom of the grain silo and a grain discharge conveyor belt set below the grain discharge funnel; The elevator is equipped with a feed inlet and a return inlet. The feed inlet is used to input high-moisture grain, and the return inlet is used to receive grain from the discharge conveyor belt. One end of the discharge conveyor belt is connected to the return inlet of the elevator, and the other end of the discharge conveyor belt is set as the discharge end. The grain discharge conveyor belt includes a first sub-conveyor belt and a second sub-conveyor belt. The elevator is located in the middle of the grain silo. The first sub-conveyor belt and the second sub-conveyor belt are symmetrically distributed on both sides of the return port of the elevator, and the conveying directions of the first sub-conveyor belt and the second sub-conveyor belt are opposite, so that the grain on the first sub-conveyor belt and the second sub-conveyor belt can be collected at the return port of the elevator. The return port of the elevator is equipped with a cover. When the moisture content of the grain discharged from the grain silo reaches a preset value, the second sub-conveyor belt is reversed so that the grain discharge direction of the second sub-conveyor belt is the same as that of the first sub-conveyor belt. The cover of the return port of the elevator is closed, so that the grain discharge conveyor belt transports the grain discharged from the grain silo to the next processing step.

2. The heat pump type high-humidity grain dryer according to claim 1, characterized in that, The top of the elevator is provided with a first conveying pipe and a second conveying pipe that are symmetrically distributed. The outlets of the first and second conveying pipes are located at the top of the grain silo.

3. The heat pump type high-humidity grain dryer according to claim 2, characterized in that, The first conveying pipe and the second conveying pipe are inclined pipe structures.

4. The heat pump type high-humidity grain dryer according to claim 1, characterized in that, The upper air duct and the lower air duct are arranged horizontally and are parallel to each other.

5. The heat pump type high-humidity grain dryer according to claim 1, characterized in that, The grain silo is equipped with a temperature sensor, which is used to detect the temperature inside the grain silo.

6. The heat pump type high-humidity grain dryer according to claim 1, characterized in that, The grain silo is provided with a roof on top, and one side of the roof extends outside the top of the grain silo to form an eave.

7. The heat pump type high-humidity grain dryer according to claim 6, characterized in that, The upper end of the hoist is fixed to the eaves.

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