Semi-static hot air circulation type grain drying method and system and storage medium

Abstract

The invention discloses a semi-static hot air circulation type grain drying method and system and a storage medium. The method comprises the following steps: starting the feeding mechanism; a hot air circulation conveying system and a heat source supply mechanism are started, and a material circulation output mechanism and a feeding mechanism are discontinuously started; the material temperature and the material moisture in the drying bin are monitored in real time, the humidity of the moisture removal cavity is monitored in real time, and whether the humidity of the moisture removal cavity is larger than a first preset threshold value or not is judged, if yes, a moisture removal mechanism is started, and air in the moisture removal cavity is discharged; judging whether the material moisture reaches a second preset threshold value or not; judging whether the second specified parameter meets a second preset requirement or not; if yes, updating at least one of the first preset range, the first preset threshold value and the second preset requirement. According to the method, dynamic adaptation of the drying parameters is achieved, the drying parameters can adapt to material state changes in different grain drying stages, the heat energy utilization rate is increased, and the drying efficiency is optimized.

Description

Technical Field

[0001] This invention relates to the field of grain drying technology, and in particular, to a semi-static hot air circulation type grain drying method, system, and storage medium. Background Technology

[0002] Grain typically contains high moisture content after harvest. If it is not dried promptly and effectively, it is highly susceptible to mold, sprouting, and other problems, leading to a decline in grain quality and yield loss. Therefore, grain drying is a crucial step in ensuring the safe storage and subsequent processing of grain. With the development of large-scale and intensive agriculture, increasingly higher demands are being placed on the efficiency, uniformity of drying, energy consumption control, and level of intelligence in grain drying technology.

[0003] Current grain drying technologies mostly employ static or dynamic drying modes. In static drying, the material is piled up still in the drying chamber, and hot air passes through the material layer from top to bottom or bottom to top for drying. While this mode is structurally simple, it has significant drawbacks: poor ventilation within the material layer leads to uneven heating and moisture distribution between upper and lower layers, easily resulting in localized over-drying or under-drying, leading to inconsistent drying quality. Furthermore, during static drying, hot and humid air tends to accumulate in the drying chamber; if dehumidification is not timely, it further affects drying efficiency and increases energy consumption.

[0004] Dynamic drying mode uses a conveyor mechanism to continuously move the material, ensuring full contact between the material and hot air, which improves drying uniformity to some extent. However, existing dynamic drying technologies mostly use continuous feeding and discharging methods, and the hot air is also continuously input and discharged, resulting in high energy consumption. In addition, although dynamic drying equipment is equipped with a circulating conveyor structure, it does not achieve coordinated control of hot air circulation and material circulation, nor does it dynamically adjust drying parameters according to changes in the material's state (such as moisture and temperature) during the drying process, resulting in drying efficiency and energy utilization still needing improvement. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a semi-static hot air circulation type grain drying method, system, and storage medium.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A semi-static hot air circulation grain drying method includes the following steps: S1, starting the feeding mechanism to feed the material into the drying chamber; S2, starting the hot air circulation conveying system and the heat source supply mechanism, and intermittently starting the material circulation output mechanism and the feeding mechanism; the heat source supply mechanism is used to provide a heat source to the hot air circulation conveying system, which is used to input hot air into the drying chamber and circulate the airflow in the drying chamber to dry the material; the material circulation output mechanism is used to convey the material in the drying chamber to the feeding mechanism; the material temperature and moisture content in the drying chamber are monitored in real time, and the material temperature in the drying chamber is controlled. Within the first preset range, the humidity of the dehumidification chamber is monitored in real time, and it is determined whether the humidity of the dehumidification chamber is greater than the first preset threshold. If so, the dehumidification mechanism is turned on to discharge the air from the dehumidification chamber until the first specified parameter reaches the first preset requirement, and then the dehumidification mechanism is turned off. S3, it is determined whether the moisture content of the material reaches the second preset threshold. If so, proceed to step S4. If not, it is determined whether the second specified parameter reaches the second preset requirement. If so, at least one of the first preset range, the first preset threshold, and the second preset requirement is updated, and the process returns to step S2. S4, the heat source supply mechanism is turned off until the material temperature reaches the third preset threshold.

[0007] Furthermore, step S4 also includes opening the dehumidification mechanism, the cooling air inlet valve, and the hot air circulation delivery system, wherein the cooling air inlet valve is used to provide cold air to the drying chamber.

[0008] Furthermore, in step S2, when the dehumidification mechanism is turned on, the make-up air valve of the air inlet pipe on the hot air circulation conveying system needs to be turned on.

[0009] Furthermore, the second specified parameter includes drying time, which is started from the time when the material temperature in the drying chamber first reaches the first preset range. The second preset requirement is that the drying time reaches a third preset threshold. In step S3, the second preset requirement is updated to the third preset threshold, and the updated third preset threshold is greater than the previous third preset threshold.

[0010] Furthermore, the second specified parameter includes material moisture content, and the second preset requirement is that the material moisture content reaches a fourth preset threshold. In step S3, the second preset requirement is updated to update the fourth preset threshold, and the updated fourth preset threshold is less than the previous fourth preset threshold.

[0011] Furthermore, the first specified parameter is the duration of operation of the dehumidification mechanism and / or the humidity of the dehumidification chamber; the first preset requirement is that the duration of operation of the dehumidification mechanism is longer than the preset duration and / or the humidity of the dehumidification chamber reaches the fifth preset threshold.

[0012] Further, the drying chamber includes an inner chamber and an insulated chamber, the insulated chamber being located on the outer periphery of the inner chamber, and the dehumidification chamber being formed by the insulated chamber and the inner chamber; the inner chamber includes a drying section and a tempering section located at the upper end of the drying section, the upper end of the tempering section being provided with a feeding port for the feeding mechanism to input materials; the drying section can be equipped with hot air to dry the materials within the drying section; step S1 specifically includes: S11, opening the feeding mechanism to send the materials into the drying chamber, and simultaneously opening the hot air circulation conveying system, the heat source supply mechanism, and the dust removal fan; S12, obtaining the material level height and determining whether the material level height is greater than a sixth preset threshold: if so, reducing the power of the dust removal fan to a preset working state; S13, determining whether the material level height is greater than a seventh preset threshold: if so, proceeding to step S2.

[0013] Furthermore, in step S2, the material circulation output mechanism can only be activated for the first time after the material temperature reaches the first preset range for the first time.

[0014] This invention also provides a semi-static hot air circulation grain drying system, comprising: a feeding module for activating the feeding mechanism to feed materials into the drying chamber; a drying module for activating the hot air circulation conveying system and the heat source supply mechanism, and intermittently activating the material circulation output mechanism and the feeding mechanism; the heat source supply mechanism is used to provide a heat source to the hot air circulation conveying system, which in turn inputs hot air into the drying chamber to circulate the airflow within the drying chamber for drying the materials; the material circulation output mechanism is used to convey the materials in the drying chamber to the feeding mechanism; and the material temperature and moisture content within the drying chamber are monitored in real time, and the material temperature within the drying chamber is controlled. Within the first preset range, the humidity of the dehumidification chamber is monitored in real time, and it is determined whether the humidity of the dehumidification chamber is greater than the first preset threshold. If so, the dehumidification mechanism is turned on to discharge the air from the dehumidification chamber until the first specified parameter reaches the first preset requirement, and then the dehumidification mechanism is turned off. The stage update module is used to determine whether the material moisture content reaches the second preset threshold. If so, proceed to step S4. If not, determine whether the second specified parameter reaches the second preset requirement. If so, update at least one of the first preset range, the first preset threshold, and the second preset requirement, and return to step S2. The cooling module is used to turn off the heat source supply mechanism until the material temperature reaches the third preset threshold.

[0015] The present invention also provides a storage medium storing a computer program that, when executed by a processor, implements a semi-static hot air circulation grain drying method.

[0016] The present invention has the following beneficial effects: This method, through the intermittent activation of the material circulation output and feeding mechanisms in step S2, utilizes a circular conveying design where the material in the drying chamber is transported back to the feeding mechanism via the material circulation output mechanism. This allows the material in the drying chamber to be periodically circulated, turned over, and re-distributed, avoiding the problems of poor ventilation and uneven heating and humidity distribution between upper and lower layers in existing static drying modes. It ensures that all materials are fully exposed to hot air, improving overall drying uniformity and guaranteeing consistent grain quality. The hot air circulation conveying system circulates the airflow within the drying chamber, allowing hot air to repeatedly act on the material. This avoids the significant heat loss caused by continuous hot air input and output in existing dynamic drying technologies, significantly improving heat energy utilization. Furthermore, by intermittently activating the material circulation output and feeding mechanisms, compared to the continuous material conveying mode in existing dynamic drying technologies, the continuous operation energy consumption of the conveying mechanism is reduced. Combined with the on-demand activation of the dehumidification mechanism, it avoids heat waste caused by indiscriminate dehumidification, further reducing overall drying energy consumption and making it more suitable for small- to medium-scale grain drying scenarios. This method also achieves precise start-stop control of the dehumidification mechanism by real-time monitoring of material temperature, material moisture content, and dehumidification chamber humidity within the drying chamber. This solves the problems of inaccurate dehumidification control and the accumulation of hot and humid air affecting drying efficiency in existing equipment. Simultaneously, by dynamically updating at least one of the first preset range (material temperature control range), the first preset threshold (dehumidification chamber humidity threshold), and the second preset requirement based on the compliance status of the second specified parameter in step S3, the drying parameters are dynamically adapted. This allows the drying parameters to adapt to the material state changes at different stages of grain drying, avoiding the shortcomings of existing fixed-parameter drying modes that are difficult to balance the drying effect at each stage, easily leading to loss of grain nutrients or prolonged drying cycle. While ensuring grain quality, this method effectively optimizes drying efficiency.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall process of the method of the present invention; Figure 2 This is a schematic diagram of the internal structure of the drying chamber; Figure 3 This is an internal sectional view of the drying chamber; Figure 4 This is a schematic diagram of the drying chamber from an external perspective; Figure 5 This is another cross-sectional view of the drying chamber.

[0019] Legend: Feeding mechanism 100, feeding auger 110, elevator 120; Drying chamber 200, dehumidification chamber 201, inner chamber 210, drying section 211, tempering section 212, heat preservation chamber 220; Hot air circulation conveying system 300, hot air circulation pipeline 310, air inlet pipe 311, make-up air valve 312, circulating fan 313, air outlet pipe 314, hot air unit 320; Heat source supply unit 301; Material circulation output mechanism 400; Dehumidification mechanism 500; Cooling air inlet valve 600; Dust removal fan 700. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] Please refer to Figure 1 The present invention provides a semi-static hot air circulation type grain drying method in a preferred embodiment, which is used in the control system of the dryer, including steps S1, S2, S3 and S4.

[0025] S1, start the feeding mechanism 100, and the feeding mechanism 100 will send the material into the drying chamber 200.

[0026] S2, start the hot air circulation conveying system 300 and the heat source supply mechanism 301, and intermittently start the material circulation output mechanism 400 and the feeding mechanism 100; the heat source supply mechanism 301 is used to provide a heat source to the hot air circulation conveying system 300, which is used to input hot air into the drying chamber 200, circulate the airflow in the drying chamber 200, and dry the material; the material circulation output mechanism 400 is used to convey the material in the drying chamber 200 to the feeding mechanism 100; the temperature of the material in the drying chamber 200, Material moisture content is monitored in real time. Material temperature and moisture content can be monitored using a thermometer and a moisture meter installed in the drying section. The material temperature in the drying chamber 200 is controlled within a first preset range. The humidity in the dehumidification chamber 201 is monitored in real time. A hygrometer can be installed in the dehumidification chamber 201 to detect the humidity. It is determined whether the humidity in the dehumidification chamber 201 is greater than a first preset threshold. If so, the dehumidification mechanism 500 is turned on to discharge the air from the dehumidification chamber 201 until the first specified parameter reaches the first preset requirement, and then the dehumidification mechanism 500 is turned off.

[0027] S3, Determine whether the material moisture content has reached the second preset threshold: If so, proceed to step S4; If not, determine whether the second specified parameter meets the second preset requirement: if yes, update at least one of the first preset range, the first preset threshold, and the second preset requirement, and return to step S2. Typically, the first preset range, the first preset threshold, and the second preset requirement can be selectively updated according to the drying stage. Generally, the first preset threshold (humidity threshold of the dehumidification chamber) is updated to a smaller value, while the first preset range (material temperature) remains unchanged or changes towards a higher temperature. Of course, in other embodiments, the update trends of the first preset range, the first preset threshold, and the second preset requirement can be selected as unchanged, decreasing, or increasing depending on the specific scenario and requirements.

[0028] S4, shut off the heat source supply mechanism 301 until the material temperature reaches the third preset threshold.

[0029] This invention provides a semi-static hot air circulation grain drying method. In step S2, the material circulation output mechanism 400 and the feeding mechanism 100 are interrupted. The material circulation output mechanism 400 transports the material in the drying chamber 200 back to the feeding mechanism 100 in a circulation conveying design. This allows the material in the drying chamber 200 to be periodically circulated, turned over, and re-distributed. This avoids the problems of poor ventilation and uneven heating and humidity between the upper and lower layers in the existing static drying mode. It ensures that all materials can fully contact the hot air, improves the overall drying uniformity, and guarantees the consistency of grain quality. The hot air circulation conveying system 300 circulates the airflow within the drying chamber 200, allowing hot air to repeatedly act on the material. This avoids the significant heat loss caused by continuous hot air input and output in existing dynamic drying technologies, thus significantly improving heat energy utilization. Furthermore, by intermittently opening the material circulation output mechanism 400 and the feeding mechanism 100, compared to the continuous material conveying mode in existing dynamic drying technologies, the continuous operation energy consumption of the conveying mechanism is reduced. At the same time, combined with the on-demand opening of the dehumidification mechanism 500, heat energy waste caused by indiscriminate dehumidification is avoided, further reducing the overall drying energy consumption. This makes it more suitable for small and medium-sized grain drying scenarios. This method also achieves precise start-stop control of the dehumidification mechanism 500 by real-time monitoring of the material temperature, material moisture content, and humidity in the dehumidification chamber 201 within the drying chamber 200. This solves the problems of inaccurate dehumidification control and the accumulation of hot and humid air affecting drying efficiency in existing equipment. Simultaneously, by dynamically updating at least one of the first preset range (material temperature control range), the first preset threshold (dehumidification chamber humidity threshold), and the second preset requirement based on the compliance status of the second specified parameter in step S3, the drying parameters are dynamically adapted. This allows the drying parameters to adapt to the material state changes at different stages of grain drying, avoiding the shortcomings of existing fixed-parameter drying modes that are difficult to balance the drying effect at each stage, easily leading to loss of grain nutrients or prolonged drying cycle. While ensuring grain quality, this method effectively optimizes drying efficiency.

[0030] It is understandable that in step S2, the material temperature in the drying chamber 200 is controlled within a first preset range, that is, the material temperature is monitored in real time. When the material temperature is greater than the first preset range, the output power of the heat source supply mechanism 301 is reduced. When the heat source supply mechanism 301 is a burner, the fuel input speed of the heat source supply mechanism 301 can be reduced, thereby reducing the material temperature. When the material temperature is lower than the first preset range, the output power of the heat source supply mechanism 301 is increased.

[0031] The material circulation output mechanism 400 and the feeding mechanism 100 can be intermittently opened and closed at set fixed intervals. Alternatively, specified parameters can be detected and judged, and the opening and closing can be executed based on the judgment results.

[0032] In some embodiments of the present invention, step S4 further includes opening the dehumidification mechanism 500, the cooling air inlet valve 600, and the hot air circulation conveying system 300. The cooling air inlet valve 600 is used to provide cold air to the drying chamber 200. Adding the step of opening the dehumidification mechanism 500, the cooling air inlet valve 600, and the hot air circulation conveying system 300 in step S4 allows the cooling air inlet valve 600 to continuously supply cold air to the drying chamber 200. Combined with the airflow circulation of the hot air circulation conveying system 300, this ensures that the cold air fully contacts the dried, high-temperature material, achieving rapid heat exchange and cooling. Compared to simply shutting off the heat source supply mechanism 301 for natural cooling, this significantly shortens the material cooling time and avoids prolonged retention of high-temperature material. Simultaneously, the synchronous opening of the dehumidification mechanism 500 can promptly remove moisture precipitated on the material surface during cooling, further ensuring material dryness and improving the storage stability of the dried material. Furthermore, no additional cooling equipment is required throughout the process, simplifying the process and reducing energy consumption during the cooling stage. In addition, the hot air circulation conveying system 300 not only circulates the internal airflow, but also removes the heat from the heat source supply mechanism 301, thereby cooling the heat source supply mechanism 301. Secondly, it ensures that the internal airflow does not become too low when the grain is cooled. By introducing the residual heat of the heat source supply mechanism 301 into the drying chamber, the grain can be gradually cooled, and the airflow in the drying chamber maintains a certain temperature, which can prevent the introduction of external cold air from causing the internal grain humidity to increase.

[0033] In some embodiments of the present invention, in step S2, when the dehumidification mechanism 500 is activated, the make-up air valve 312 of the air inlet pipe 311 on the hot air circulation conveying system 300 needs to be activated. Activating the dehumidification mechanism 500 simultaneously requires activating the make-up air valve 312 of the air inlet pipe 311 of the hot air circulation conveying system 300, allowing fresh air to be supplied to the hot air circulation conveying system 300 during the dehumidification process. This avoids problems such as excessively low air pressure and poor airflow circulation within the drying chamber 200 due to dehumidification, ensuring the continuity of the hot air's drying effect on the materials. Simultaneously, the supplied fresh air is heated by the heat source supply mechanism 301 and participates in the circulating drying process, preventing excessive heat loss caused by dehumidification, maintaining the temperature stability within the drying chamber 200, resolving the existing contradiction between dehumidification and hot air circulation, and ensuring the efficient and continuous drying process.

[0034] In some embodiments of the present invention, the second specified parameter includes drying time. The drying time is started from the moment the material temperature in the drying chamber 200 first reaches a first preset range. The second preset requirement is that the drying time reaches a third preset threshold. In step S3, the second preset requirement is updated to update the third preset threshold, and the updated third preset threshold is greater than the previous third preset threshold. The second specified parameter is limited to the drying time starting from the moment the material temperature first reaches the first preset range, and the second preset requirement is that the drying time reaches a third preset threshold. The updated third preset threshold is greater than the previous one. Since the drying time is cumulative, the drying time for the next stage will definitely need to be updated and increased. For example, if the first stage takes 1 hour and the second stage takes 2 hours, the initial value of the third preset threshold is 1 hour. After one update, the value of the third preset threshold is 3 hours. The timing starts from the moment the material temperature first reaches the first preset range, and the starting point is the same. Clearly defining the starting point of the drying time and the dynamic adjustment logic makes the division of drying stages more closely match the actual drying process of the material. In the early stages, when the material has a high moisture content, a shorter drying time threshold can quickly complete the initial dehydration. In the later stages, as the moisture content of the material decreases, extending the drying time threshold ensures that deep moisture is fully extracted. At the same time, the quantitative control of the drying time makes the drying process more operable, facilitating precise control of the drying rhythm at each stage and improving the consistency of drying quality across different batches of material.

[0035] In some embodiments of the present invention, the second specified parameter includes material moisture content, and the second preset requirement is that the material moisture content reaches a fourth preset threshold. In step S3, updating the second preset requirement involves updating the fourth preset threshold, and the updated fourth preset threshold is lower than the previous fourth preset threshold. Using material moisture content as the core indicator for stage updates, the material moisture content is high in the initial drying stage, and setting a higher fourth preset threshold can quickly complete a large amount of dehydration. As drying progresses, the fourth preset threshold is gradually reduced, guiding the material moisture content to steadily decrease to the second preset threshold, avoiding the problems of low drying efficiency in the early stage and over-drying in the later stage under a fixed moisture threshold. Simultaneously, the dynamic monitoring of material moisture content and the threshold update form a closed-loop control. By dividing the drying process into stages based on material moisture content, the parameters for each stage are closely related to the material state, ensuring real-time matching between drying parameters and material state, further improving drying accuracy and grain quality.

[0036] In some embodiments of the present invention, the first specified parameter is the operating time of the dehumidification mechanism 500 and / or the humidity of the dehumidification chamber 201; the first preset requirement is that the operating time of the dehumidification mechanism 500 is longer than a preset time and / or the humidity of the dehumidification chamber 201 reaches a fifth preset threshold. This provides a precise basis for determining when to close the dehumidification mechanism 500. In some embodiments, using the humidity of the dehumidification chamber 201 as a basis ensures timely closure after dehumidification reaches the target humidity, avoiding ineffective dehumidification; in some embodiments, using the operating time as a basis prevents insufficient dehumidification due to the humidity sensor only detecting local humidity, thus improving the reliability of dehumidification control. This solves the problem of single and insufficient precision in the start / stop control of existing dehumidification mechanisms, ensuring dehumidification effect while minimizing heat and air volume waste, thus balancing drying efficiency and energy consumption control. Of course, in some other embodiments, the humidity of the dehumidification chamber 201 and the operating time are used as dual criteria for determination. That is, the first specified parameters are the operating time of the dehumidification mechanism 500 and the humidity of the dehumidification chamber 201; the first preset requirement is that the operating time of the dehumidification mechanism 500 is greater than the preset time and the humidity of the dehumidification chamber 201 reaches the fifth preset threshold, thereby ensuring that the dehumidification time and parameters meet the standards. Of course, the first preset requirement can also be updated in step S3 while updating the first preset range, the first preset threshold and the second preset requirement. For example, as the drying stage progresses, the setting of the fifth preset threshold can become lower and lower.

[0037] Reference Figures 2 to 5In some embodiments of the present invention, the drying chamber 200 includes an inner chamber 210 and an insulated chamber 220. The insulated chamber 220 is disposed on the outer periphery of the inner chamber 210, and the dehumidification chamber 201 is formed by the insulated chamber 220 and the inner chamber 210. The inner chamber 210 includes a drying section 211 and a tempering section 212 disposed at the upper end of the drying section 211. The upper end of the tempering section 212 is provided with a feed inlet for the feeding mechanism 100 to input materials. Hot air can enter the drying section 211 to dry the materials inside the drying section 211. The insulated chamber 220 can effectively reduce the heat loss from the drying chamber 200 to the outside, reduce the reheating frequency of the heat source supply mechanism 301, and significantly improve the heat preservation and energy saving effect. At the same time, the independent dehumidification chamber 201 allows the hot and humid air to be discharged in a concentrated manner, avoiding the stagnation of hot and humid air around the material layer and improving the dehumidification efficiency. The inner silo 210 is divided into a drying section 211 and a tempering section 212. Hot air is introduced into the drying section 211 for rapid dehydration, while heat transfer in the tempering section 212 allows some heat to enter, preheating and drying the material and improving drying efficiency. The feeding mechanism 100 includes a feeding auger 110 and an elevator 120. The material circulation output mechanism 400 is an output auger located at the bottom of the inner silo 210, which outputs the material to a container at the bottom of the elevator 120. The elevator 120 then conveys the grain from the container back to the feeding auger 110, and finally, the material is conveyed by the feeding auger 110 to the inlet at the top of the tempering section 212. The hot air circulation conveying system 300 includes a hot air circulation pipeline 310 and a hot air unit 320. The hot air unit 320 consists of multiple fans located at the bottom of the inner silo 210, which input hot air into the inner silo 210. The hot air circulation pipeline 310 includes an air inlet pipe 311, a circulating fan 313, a heating pipe, and an air outlet pipe 314 connected in sequence. The air inlet pipe 311 is connected to the middle or top of the dehumidification chamber 201, and the air outlet pipe 314 is connected to the bottom of the dehumidification chamber 201. The heating pipe is located inside the heat source supply mechanism 301 so as to be heated by the heat source supply mechanism 301.

[0038] Step S1 specifically includes steps S11, S12 and S13.

[0039] S11, the feeding mechanism 100 is turned on to send the material into the drying chamber 200, and the hot air circulation conveying system 300, the heat source supply mechanism 301 and the dust removal fan 700 are turned on at the same time; the dust removal fan 700 is connected to the outer shell of the feeding mechanism 100.

[0040] S12, Obtain the material level height and determine whether the material level height is greater than the sixth preset threshold: If so, reduce the power of the dust removal fan 700 to the preset working state; S13, Determine if the material level height is greater than the seventh preset threshold: If so, proceed to step S2.

[0041] When the material level reaches the sixth preset threshold, the material has filled the drying section 211.

[0042] During feeding, the hot air circulation conveying system 300, the heat source supply mechanism 301, and the dust removal fan 700 are simultaneously activated. This allows for pre-drying and dust removal of the material at the initial feeding stage, reducing subsequent drying pressure and dust pollution. When the material level reaches the sixth preset threshold and the drying section 211 is filled, the power of the dust removal fan 700 is reduced. This ensures the dust removal effect at the initial feeding stage and avoids energy waste caused by high-power dust removal after the material is filled. After the material level reaches the seventh preset threshold, step S2 is entered to ensure that the amount of material in the drying section 211 meets the requirements for circulation drying and avoids low hot air circulation efficiency due to insufficient material.

[0043] In a specific embodiment of the present invention, in step S2, the material circulation output mechanism 400 is only activated for the first time after the material temperature reaches the first preset range. This avoids heat loss and decreased drying efficiency caused by premature circulation before the material reaches the target drying temperature. After the material temperature reaches the first preset range, surface and shallow moisture has initially precipitated. Circulation and turning at this time not only ensures more uniform heating of the material but also allows deep moisture to quickly migrate to the surface and be carried away by hot air, solving the problem of prolonged drying cycles caused by low-temperature material circulation in existing dynamic drying processes. Simultaneously, this limiting condition ensures the synergy between material circulation and temperature control, further improving drying uniformity and energy utilization, and guaranteeing grain quality.

[0044] The present invention also provides a semi-static hot air circulation grain drying system, comprising: a feeding module for activating the feeding mechanism 100 to feed material into the drying chamber 200; a drying module for activating the hot air circulation conveying system 300 and the heat source supply mechanism 301, and intermittently activating the material circulation output mechanism 400 and the feeding mechanism 100; the heat source supply mechanism 301 for providing a heat source to the hot air circulation conveying system 300, which in turn inputs hot air into the drying chamber 200 to circulate the airflow within the drying chamber 200 for drying the material; the material circulation output mechanism 400 for conveying the material within the drying chamber 200 to the feeding mechanism 100; and real-time monitoring of the material temperature and moisture content within the drying chamber 200 to dry the material. The material temperature inside the drying chamber 200 is controlled within a first preset range. The humidity of the dehumidification chamber 201 is monitored in real time, and it is determined whether the humidity of the dehumidification chamber 201 is greater than a first preset threshold. If so, the dehumidification mechanism 500 is activated to discharge the air from the dehumidification chamber 201 until the first specified parameter reaches the first preset requirement, at which point the dehumidification mechanism 500 is deactivated. A stage update module is used to determine whether the material moisture content reaches a second preset threshold. If so, the process proceeds to step S4; if not, it determines whether the second specified parameter reaches a second preset requirement. If so, at least one of the first preset range, the first preset threshold, and the second preset requirement is updated, and the process returns to step S2. A cooling module is used to shut off the heat source supply mechanism 301 until the material temperature reaches a third preset threshold. This achieves dynamic adjustment and adaptation of drying parameters, enabling the drying parameters to adapt to the changes in the material state at different stages of grain drying. This avoids the difficulty of fixed parameters in balancing the drying effect at each stage, reduces energy consumption, and optimizes drying efficiency.

[0045] The present invention also provides a storage medium storing a computer program, which, when executed by a processor, implements a semi-static hot air circulation grain drying method.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A semi-static hot air circulation grain drying method, characterized in that, include: S1, start the feeding mechanism (100) and send the material into the drying chamber (200). S2, start the hot air circulation conveying system (300) and the heat source supply mechanism (301), and intermittently start the material circulation output mechanism (400) and the feeding mechanism (100); the heat source supply mechanism (301) is used to provide a heat source to the hot air circulation conveying system (300), the hot air circulation conveying system (300) is used to input hot air into the drying chamber (200), and circulate the airflow in the drying chamber (200) to dry the material; the material circulation output mechanism (400) is used to discharge the material from the drying chamber (200) into the drying chamber (200). The material in the drying chamber (200) is conveyed to the feeding mechanism (100); the material temperature and moisture content in the drying chamber (200) are monitored in real time, the material temperature in the drying chamber (200) is controlled within the first preset range, the humidity of the dehumidification chamber (201) is monitored in real time, and it is determined whether the humidity of the dehumidification chamber (201) is greater than the first preset threshold: if so, the dehumidification mechanism (500) is turned on to discharge the air in the dehumidification chamber (201) until the first specified parameter reaches the first preset requirement, and then the dehumidification mechanism (500) is turned off. S3, Determine whether the material moisture content has reached the second preset threshold: If so, proceed to step S4; If not, determine whether the second specified parameter meets the second preset requirement: if yes, update at least one of the first preset range, the first preset threshold and the second preset requirement, and return to step S2; S4, shut off the heat source supply mechanism (301) until the material temperature reaches the third preset threshold.

2. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, Step S4 also includes opening the dehumidification mechanism (500), the cooling air inlet valve (600), and the hot air circulation delivery system (300), wherein the cooling air inlet valve (600) is used to provide cold air to the drying chamber (200).

3. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, In step S2, when the dehumidification mechanism (500) is turned on, the make-up air valve (312) of the air inlet pipe (311) on the hot air circulation conveying system (300) needs to be turned on.

4. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, The second specified parameter includes drying time, which is started from the time when the material temperature in the drying chamber (200) first reaches the first preset range. The second preset requirement is that the drying time reaches the third preset threshold. In step S3, the second preset requirement is updated to the third preset threshold, and the updated third preset threshold is greater than the previous third preset threshold.

5. The semi-static hot air circulation grain drying method according to claim 1 or 4, characterized in that, The second specified parameter includes material moisture content. The second preset requirement is that the material moisture content reaches a fourth preset threshold. In step S3, the second preset requirement is updated to update the fourth preset threshold, and the updated fourth preset threshold is less than the previous fourth preset threshold.

6. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, The first specified parameter is the opening duration of the dehumidification mechanism (500) and / or the humidity of the dehumidification chamber (201); the first preset requirement is that the opening duration of the dehumidification mechanism (500) is longer than the preset duration and / or the humidity of the dehumidification chamber (201) reaches the fifth preset threshold.

7. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, The drying chamber (200) includes an inner chamber (210) and an insulation chamber (220). The insulation chamber (220) is located on the outer periphery of the inner chamber (210). The dehumidification chamber (201) is formed by the insulation chamber (220) and the inner chamber (210). The inner chamber (210) includes a drying section (211) and a tempering section (212) located at the upper end of the drying section (211). The upper end of the tempering section (212) is provided with a feed inlet for the feeding mechanism (100) to input materials. Hot air can enter the drying section (211) to dry the materials in the drying section (211). Step S1 specifically includes: S11, the feeding mechanism (100) is turned on to send the material into the drying chamber (200), and the hot air circulation conveying system (300), the heat source supply mechanism (301) and the dust removal fan (700) are turned on at the same time. S12, Obtain the material level height and determine whether the material level height is greater than the sixth preset threshold: If so, reduce the power of the dust removal fan (700) to the preset working state; S13, Determine if the material level height is greater than the seventh preset threshold: If so, proceed to step S2; When the material level reaches the sixth preset threshold, the material has filled the drying section (211).

8. The semi-static hot air circulation grain drying method according to claim 1, characterized in that, In step S2, the material circulation output mechanism (400) can only be activated for the first time after the material temperature reaches the first preset range for the first time.

9. A semi-static hot air circulation grain drying system, characterized in that, A semi-static hot air circulating grain drying method as described in any one of claims 1 to 8, comprising: The feeding module is used to activate the feeding mechanism (100) and send the material into the drying chamber (200). The drying module is used to start the hot air circulation conveying system (300) and the heat source supply mechanism (301), and to intermittently start the material circulation output mechanism (400) and the feeding mechanism (100); the heat source supply mechanism (301) is used to provide a heat source to the hot air circulation conveying system (300), the hot air circulation conveying system (300) is used to input hot air into the drying chamber (200), and to circulate the airflow in the drying chamber (200) to dry the material; the material circulation output mechanism (400) is used to discharge the material from the drying chamber. The material in (200) is conveyed to the feeding mechanism (100); the material temperature and moisture content in the drying chamber (200) are monitored in real time, the material temperature in the drying chamber (200) is controlled within the first preset range, the humidity of the dehumidification chamber (201) is monitored in real time, and it is determined whether the humidity of the dehumidification chamber (201) is greater than the first preset threshold: if so, the dehumidification mechanism (500) is turned on to discharge the air in the dehumidification chamber (201) until the first specified parameter reaches the first preset requirement, and then the dehumidification mechanism (500) is turned off. The stage update module is used to determine whether the material moisture content has reached the second preset threshold: if yes, proceed to step S4; if no, determine whether the second specified parameter has reached the second preset requirement: if yes, update at least one of the first preset range, the first preset threshold and the second preset requirement, and return to step S2; the cooling module is used to shut off the heat source supply mechanism (301) until the material temperature reaches the third preset threshold.

10. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the semi-static hot air circulation grain drying method as described in any one of claims 1 to 8.

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