Recycling equipment for preheating and recycling during drying of corn seeds

Abstract

The utility model discloses recycling equipment for preheating and recycling during drying of corn seeds. Comprising a drying bin; the heat pump unit is provided with an air outlet; the air outlet is communicated with the drying bin; the exhaust unit is provided with an air inlet communicated with an air inlet pipeline; the air inlet is communicated with the drying bin; a filter unit is arranged in the exhaust unit and is used for cleaning entering air; the inner wall of the air return pipeline is provided with a heat preservation and insulation material, the heat pump unit and the air exhaust unit are communicated through the air return pipeline, and circular flowing of air is achieved. According to the recycling equipment for preheating and recycling during drying of the corn seeds, the cleanliness of hot air passing through corn seed materials can be guaranteed; in addition, circulating hot air is ensured not to block a compressor, a condensation part, an evaporation part and other parts of the heat pump after entering the heat pump; in other words, the heating performance of the heat pump cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to corn seed drying equipment field, concretely is a kind of recovery equipment of preheating repeated cyclic utilization in corn seed drying. BACKGROUND

[0002] The corn seed harvesting season in northern region is usually in September to October, and the average temperature in October in Zhangye, Gansu, the main production area of northern corn seed, is 2℃~18℃;Due to low ambient temperature and large diurnal temperature range, when air source heat pump drying technology is applied in cold climate conditions, it often faces the shortcomings of excessively high exhaust temperature, serious reduction of heating capacity and low energy efficiency.

[0003] Therefore, how to improve the drying performance of air source heat pump under cold conditions is one of the main factors affecting the use of heat pump dryer in the low-temperature environment in the north.

[0004] When the existing drying device dries corn seeds, in order to meet the heat required for drying, especially for heat pump dryer, it needs to continuously run the heat-assisted electric heating pipe, thereby the energy consumption is large, the cost is high, which makes the popularization rate of heat pump in this field in the north not high.

[0005] At the same time, in the current corn seed drying equipment, the high-temperature moisture generated is directly discharged into the atmosphere, and the heat pump needs to continuously inhale the low-temperature air in the environment, and then enters the drying bin after reheating, which needs more electric energy. SUMMARY

[0006] In view of the above technical problems, the utility model provides a kind of recovery equipment of preheating repeated cyclic utilization in corn seed drying, which repeatedly utilizes the waste heat in heat pump drying;Therefore, the utility model can effectively save the energy consumption of heat pump.

[0007] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0008] A kind of recovery equipment of preheating repeated cyclic utilization in corn seed drying;Including: drying bin;

[0009] Heat pump unit has air outlet;The air outlet is communicated with the drying bin;

[0010] Exhaust unit has air inlet communicated with air inlet pipeline;The air inlet is communicated with the drying bin;Filter unit is provided in the exhaust unit, for cleaning the air entering;

[0011] Air return pipeline, outer wall is equipped with heat insulation material, the heat pump unit and the exhaust unit are communicated, the circulation of air is realized.

[0012] Further, a middle part of the return air pipeline is provided with a return air booster fan for boosting the air flowing in the return air pipeline.

[0013] Further, a return air control module is further included, which comprises

[0014] A first temperature sensor is arranged at a connecting port of the return air pipeline and the exhaust unit.

[0015] Further, the filter unit comprises a dust falling chamber, and the dust falling chamber is communicated with the drying bin through an air duct.

[0016] Further, the multi-layer filter device is composed of a plurality of filter screens and a shell, and the plurality of filter screens are uniformly arranged in the shell along the air inlet direction in a sliding connection mode.

[0017] Further, a heat pump control module is further included, which comprises

[0018] A second temperature sensor is arranged at a connecting port of the return air pipeline and the drying bin.

[0019] Further, the heat pump control module further comprises a cold air inlet, which is controlled to be opened and closed through a lifting assembly, and the lifting assembly is electrically connected with the heat pump control unit.

[0020] The corn seed drying preheating recycling equipment has the following advantages:

[0021] Firstly, the corn seed drying preheating recycling equipment can ensure the cleanliness of the hot air after passing through the corn seed material, and ensure that the circulating hot air will not block the compressor, condenser and evaporator of the heat pump after entering the heat pump, that is, the heating performance of the heat pump will not be affected.

[0022] Secondly, the corn seed drying preheating recycling equipment can ensure that the air temperature entering the heat pump inlet is much higher than the ambient temperature through the multi-layer air filter device and the heat preservation pipeline and the secondary delivery of the booster fan, effectively reduce the heat pump electric auxiliary heating operation time and the heat pump compressor working power, and realize the effect of energy saving and efficiency increasing. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0024] The above and other aspects of the present application will now be described, by way of example only, with reference to the accompanying drawings in which:

[0025] Figure 1 Front view schematic diagram of the preheating recycling recovery equipment;

[0026] Figure 2 Front view schematic diagram of the preheating recycling recovery equipment.

[0027] In the figure: 1, heat pump unit; 2, heat pump air outlet; 3, drying bin; 4, main fan; 5, air outlet pipeline; 6, dust falling chamber; 7, multi-layer filtering device; 8, air return pipeline; 9, air return booster fan; 10, heat pump air return port. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0029] As shown in Figure 1 and Figure 2 , a preheating recycling recovery equipment in corn seed drying; including: drying bin 3, drying bin 3 as the core component of the system, its internal structure is carefully designed to adapt to different types and quantities of corn seeds. The bin is provided with multi-layer sieve plate and ventilation system to ensure that hot air can flow uniformly, so that the seeds are evenly heated during drying, thereby ensuring the drying quality. In addition, the size and shape of the drying bin 3 are optimized according to the processing requirements to achieve maximum drying efficiency and minimum energy consumption.

[0030] The heat pump unit is designed with advanced heat pump technology, including compressor, condenser, expansion valve and evaporator and other key components, to form a heat pump unit 1. The air outlet of the heat pump unit (i.e. heat pump air outlet 2) is connected with the drying bin 3, to ensure that hot air can be directly sent into the drying bin 3, improving the drying efficiency.

[0031] The exhaust unit is connected to the drying bin 3 through the air inlet of the main fan 4 using the air inlet pipe (i.e. the air outlet pipe 5 of the drying bin 3) to extract the humid air in the drying bin 3. In order to ensure the cleanliness of the air entering the heat pump unit, a filtering unit is provided in the exhaust unit, including a dust falling chamber 6 and a multi-layer filtering device 7. These devices can effectively remove dust and moisture in the air, ensuring the efficient operation of the heat pump unit. The design of the filtering unit is crucial to ensure the efficient operation of the heat pump unit. The setting of the dust falling chamber 6 and the multi-layer filtering device 7 not only effectively removes dust and moisture in the air, but also ensures that the heat exchanger of the heat pump unit does not decrease in efficiency due to dust accumulation. The design of the multi-layer filtering device 7 uses filtering screens of different pore sizes to accommodate particles of different sizes, improving filtering efficiency.

[0032] The return air pipe 8 connects the heat pump unit and the exhaust unit, forming a closed circulation system. The outer wall is provided with thermal insulation material to communicate the heat pump unit and the exhaust unit, realizing the circulation of air. The thermal insulation material on the outer wall of the pipe effectively reduces heat loss, ensuring the temperature of the air during circulation; wherein the connection port of the return air pipe 8 and the heat pump unit is also called the heat pump return air port 10.

[0033] The device is designed with a return air booster fan 9 to further improve the efficiency of air flow and ensure that hot air can be quickly and evenly distributed in the drying bin 3. The fan is located in the middle of the return air pipe 8, increasing air pressure and improving air flow efficiency. At the same time, the design of the fan fully considers energy consumption and noise, ensuring efficient operation without disturbing the surrounding environment. The operating state of the fan can be monitored and adjusted in real time through the return air control module to save energy consumption.

[0034] Further, since the higher the temperature of the gas, the slower the flow rate after being pushed by the same driving force, the recycling device further includes a return air control module that monitors the return air temperature in real time through a first temperature sensor and compares it with a set target temperature. According to the comparison result, the control unit calculates the control deviation and adjusts the power of the return air booster fan 9 accordingly. The automation of this process ensures efficient operation of the system while reducing manual intervention and improving operational convenience.

[0035] Further, it also includes a heat pump control module that monitors the return air temperature at the connection port of the exhaust unit and the drying bin 3 through a second temperature sensor and compares it with a preset temperature value. According to the comparison result, the control unit calculates the control deviation and adjusts the heating power of the heat pump unit accordingly; the automation of this process not only improves the drying efficiency, but also ensures the activity temperature range of the corn seeds, ensuring the drying quality.

[0036] The design of the cold air inlet allows the system to introduce external cold air when needed to regulate the temperature and humidity within the drying chamber 3. The lifting assembly of the cold air inlet is electrically connected to the heat pump control unit, ensuring that the opening and closing control of the cold air inlet is synchronized with other control processes of the system, improving the response speed and control accuracy of the system. At the same time, when the preset temperature value is exceeded, the cold air intake can be increased to reduce the temperature and avoid damaging the seed activity.

[0037] The design of this equipment adopts a centralized monitoring and management method, which realizes real-time monitoring and adjustment of system operation through PLC (Programmable Logic Controller) and various sensors and actuators. This centralized control method not only improves the running efficiency of the system, but also simplifies the operation process and reduces the operation difficulty. The configuration of sensors and actuators is the basis for accurate control of the system. The system is equipped with various sensors such as temperature sensors, humidity sensors, pressure sensors, etc. for real-time monitoring of key parameters of the system. The data of these sensors is analyzed by the control system in real time to guide the actuators to perform corresponding operations. The actuators include the return air booster fan 9, the lifting assembly of the cold air inlet, etc., which perform operations according to the instructions of the control system to ensure the accurate operation of the system.

[0038] System debugging and optimization is a key step to ensure long-term stable operation of the system. After the system is installed, a series of debugging work needs to be done, including adjustment of PID controller parameters to ensure the stability and response speed of the system. At the same time, the filter unit needs to be tested to ensure that it can effectively remove impurities in the air. These debugging and optimization work ensures that the system can maintain optimal performance under different operating conditions.

[0039] This equipment has good scalability and can be expanded according to user needs. For example, the number of drying chambers 3 can be increased or the capacity of the heat pump unit can be adjusted to adapt to larger processing capacity. This scalability allows the system to adapt to different production needs and market changes.

[0040] This equipment is equipped with safety measures including overheat protection, overpressure protection and emergency stop to ensure the safety of operators and equipment. The setting of these safety measures allows the system to discover and handle abnormal situations in time during operation, avoiding accidents.

[0041] Working process:

[0042] First, start the recycling equipment; when the system starts, the drying chamber 3 begins to load corn seeds; at the same time, the heat pump unit and the exhaust unit also start to prepare for the preheating cycle.

[0043] Then, the recovery device monitors the temperature at the connection between the return air duct 8 and the exhaust unit and the drying bin 3 in real time through the first temperature sensor and the second temperature sensor. These data are sent back to the control unit and compared with the preset target temperature.

[0044] Then, the return air control unit and the heat pump control unit calculate the power deviation according to the monitored temperature deviation; and adjust the power of the return air booster fan 9 and the heat pump unit in real time according to the power deviation value. Among them, the recovery device adaptively increases the heating power of the heat pump unit and / or increases the speed of the return air booster fan 9, or reduces the power of the heat pump unit and / or the speed of the return air booster fan 9.

[0045] At the same time, if the recovery device detects through the second temperature sensor that the temperature in the drying bin 3 approaches or exceeds the preset upper limit, the heat pump control module will control the lifting assembly to open the cold air inlet to introduce external cold air to reduce the temperature of the gas sent into the drying bin 3.

Claims

1. A recovery apparatus for preheating and recycling use in drying of corn seeds; characterized by, It comprises: a drying bin (3); a heat pump unit having an air outlet; the air outlet is in communication with the drying bin (3); an exhaust unit having an air inlet in communication with an air inlet pipeline; the air inlet is in communication with the drying bin (3); the exhaust unit is provided with a filtering unit for cleaning the incoming air; a return air duct (8) having an outer wall provided with thermal insulation material, connecting the heat pump unit and the exhaust unit to realize the circulation of air.

2. The corn seed drying preheating recycling device according to claim 1, wherein: The middle part of the return air duct (8) is provided with a return air booster fan (9) for assisting the air flowing in the return air duct (8).

3. The corn seed drying preheat recirculation recovery apparatus of claim 2, wherein: It also includes a return air control module, which includes a first temperature sensor arranged at the connection port of the exhaust unit and the return air duct (8).

4. The corn seed drying preheat recirculation recovery apparatus of claim 1, wherein: The filtering unit comprises a dust falling chamber (6); the dust falling chamber (6) is in communication with the drying bin (3) through an air duct; the dust falling chamber (6) is provided with a plurality of layers of filtering devices (7) inside for dehumidifying and dedusting the air passing through.

5. The corn seed drying preheating recycling device according to claim 4, wherein: The multi-layer filtering device (7) is composed of a plurality of layers of filter screens and a shell; the plurality of layers of filter screens are uniformly arranged inside the shell along the air inlet direction, and the filter screens and the shell are in sliding connection; wherein the mesh sizes of the plurality of layers of filter screens are different.

6. The corn seed drying preheat recirculation recovery apparatus of claim 1, wherein: It also includes a heat pump control module, which includes a second temperature sensor arranged at the connection port of the exhaust unit and the drying bin (3).

7. The corn seed drying preheat recirculation recovery apparatus of claim 6, wherein: The heat pump control module further comprises a cold air inlet, which is controlled to open and close by a lifting assembly; the lifting assembly is electrically connected with the heat pump control module.

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