Composite drying equipment

Abstract

The utility model discloses composite drying equipment which comprises a first drying unit (1), a tempering channel (13) and a second tempering drying unit (2), the tempering channel (13) is arranged at the tail end of the first drying unit (1), and a lifting mechanism (3) is arranged between the tempering channel (13) and the second tempering drying unit (2). The first drying unit (1) is a microwave drying unit; the second tempering and drying unit (2) is a tower-type constant-temperature negative-pressure drying unit, a vacuumizing device (24) is arranged at the top of the second tempering and drying unit (2), a ventilation pipeline (29) is arranged in the second tempering and drying unit (2), and the ventilation pipeline (29) is communicated with a heat supply device for supplying hot air. And microwave and heat energy are utilized, the second tempering and drying unit can further conduct tempering on the materials, the drying efficiency of the rubber tree seeds is greatly improved through multiple tempering and drying modes, and meanwhile, through precise temperature control, active ingredients in the rubber tree seeds are reserved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of drying devices, in particular to a composite drying device. Background Art

[0002] The problem of cracks in grains and other seeds during the drying process. During the drying process, grains and other seeds generate stress due to uneven shrinkage inside and outside. When the stress exceeds the stress limit of the seed, cracks are formed, causing damage to the grains and other seeds. During the heating process of grains and other seeds, the grains and other seeds will change from glass to rubber. During the drying process, due to internal diffusion control, the moisture outside the seed is low and the moisture inside is high. The outside of the seed may change from rubber to glass, so the inside of the grain is rubber and the outside is glass. The uneven expansion of the inside and outside of the grain causes cracks in the grain.

[0003] The existing drying devices are relatively simple, and most of them are large dryers for one-time drying. They need to reduce the moisture content to a required amount for storage or the next stage at one time, which leads to long drying time, low efficiency and high energy consumption. If measures such as increasing the hot air temperature are adopted to speed up the drying process, the cracking rate of grains and other material seeds cannot be guaranteed, which will eventually affect the quality of grains and other material seeds in the later stage. Therefore, when dealing with the drying needs of large quantities of materials, the existing dryers still seem to be very laborious, and cannot ensure that the drying efficiency is proportional to the quality. Therefore, it is necessary to propose a technical solution for drying by combining multi-stage drying to solve the problem. Utility Model Content

[0004] The utility model aims to provide a method for simultaneously utilizing a multi-stage microwave generator and a tower-type multi-stage constant temperature negative pressure drying chamber for multi-stage drying in view of the deficiencies in the prior art, and adopting different temperatures for drying in different drying stages through temperature control, gradually reducing the temperature and pressure inside the seeds, and gradually releasing the internal moisture, thereby completing the drying of rubber tree seeds.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model discloses a composite drying device, comprising a first drying unit, a slow drying channel and a second slow drying unit, the slow drying channel being arranged at the end of the first drying unit, and a lifting mechanism being arranged between the slow drying channel and the second slow drying unit; the first drying unit is a microwave drying unit; the second slow drying unit is a tower-type constant temperature negative pressure drying unit, a vacuum pumping device is arranged on the top of the second slow drying unit, a ventilation duct is arranged inside, and the ventilation duct is connected to a heating device for providing hot air.

[0007] In the above structure, the temperature inside the material is moderately raised through the first drying unit. When removing the water on the surface of the material, part of the internal moisture is removed. This process section is called pre-drying. Then the pre-dried material is quickly slow-dried through the slow-dried channel and then sent to the second slow-dried drying unit through the lifting mechanism. At this time, the internal pressure of the material is higher than the external pressure. The hot air heated by the heating device is sent to the second slow-dried drying unit through the ventilation duct. At the same time, the air that has completed the temperature and humidity exchange is extracted through the vacuum device on the top of the silo. The material gradually releases the internal moisture by gradually lowering the internal temperature and pressure, thereby completing the drying of the material for secondary drying. This drying method utilizes microwave solar energy and wind energy. Multiple drying methods greatly improve the drying efficiency of the material. At the same time, through precise temperature control, the active ingredients in the material are retained to the maximum extent.

[0008] Furthermore, the lifting mechanism includes a feed end and a discharge end, a feed port is provided on the top of the second slow drying unit, the feed port is connected to the discharge end of the lifting mechanism, and the slow drying channel is connected to the feed end.

[0009] Furthermore, the first drying unit also includes a microwave drying channel and a conveyor belt, and the conveyor belt passes through the microwave drying channel and the slow drying channel in sequence and is connected to the feeding end of the lifting mechanism.

[0010] In the above structure, a slow-release channel is provided at the end of the first drying unit, so that the material can be redistributed evenly through heat and moisture exchange under the action of the gradient difference after drying, thereby avoiding deterioration of material quality due to excessive temperature difference, such as cracks, hardening, etc.

[0011] Furthermore, a microwave generator and a smoke detector are provided in the microwave drying channel; each microwave generator is provided with a different number of magnetrons according to the heating temperature, each microwave generator is provided with a microwave power controller, the number of magnetrons in each microwave generator decreases from the entrance to the exit of the drying channel, and the magnetrons in each microwave generator are evenly distributed on the upper wall of the microwave generator.

[0012] The above structure uses multiple microwave generators to perform multi-stage drying on the materials on the conveyor belt to ensure that the internal pressure of the seeds is stable and will not burst. The smoke detector under the drying channel detects the smoke generated by the materials dropped from the conveyor belt to the bottom of the drying channel after long-term heating, and promptly reminds the staff to clean up.

[0013] Furthermore, a dehumidification device is arranged above the drying channel, and the dehumidification device is connected with each microwave generator through a dehumidification pipeline.

[0014] Furthermore, the second slow drying unit is divided into three sections, namely the upper section, the middle section and the lower section from top to bottom. Ventilation ducts and temperature sensors are evenly arranged in the upper section, the middle section and the lower section. The ventilation ducts in each section are respectively connected to the heating device with heating ducts. Temperature control devices are respectively arranged on the three heating ducts. The ventilation ducts are annular ventilation ducts, and the temperature sensors are connected to the temperature control devices.

[0015] The above mechanism divides the bin into three sections, each section is equipped with a temperature sensor, which can independently control the ventilation temperature and realize multi-stage drying.

[0016] Furthermore, the lower section of the second slow drying unit is a funnel-shaped storage area, a vibrator and a discharge port are provided at the bottom, and a discharge switch is installed on the discharge port.

[0017] Furthermore, the heating device includes one or more combinations of solar energy, steam energy, electric energy, and biofuel energy. A fan is provided on the hot air pipe, and the hot air pipe is connected to the annular ventilation duct.

[0018] With the above structure, the heating device can be composed of multiple heat sources, such as solar energy and steam energy, solar energy and electric energy, etc., to ensure uninterrupted heating even when there is not enough sunlight.

[0019] Furthermore, one or more combinations of a fan, a vacuum pump, and a magnetron are provided in the slow-release channel.

[0020] The above structure can quickly revive the dried material through the fan, reduce the internal thermal stress shock caused by drying, and avoid shrinkage, hardening and browning of the material surface that affect the quality of the material; it can also use vacuum revival, using a vacuum pump to extract wet steam and hot air, while reducing the moisture content, so that the moisture in the center of the material gradually diffuses to the surface to achieve a new balance, and can also inhibit the occurrence of mildew and insects in the material; it can also use microwave revival at an appropriate magnetron frequency to reduce the impact of material surface cracking caused by uneven moisture distribution on the quality, and at the same time can quickly passivate or kill bacteria and parasites inside the material.

[0021] Furthermore, the lifting mechanism also includes a conveyor belt and a lifting motor for driving the conveyor belt to move, and an anti-slip layer is provided on the outer surface of the conveyor belt.

[0022] Compared with the existing technology, the beneficial effects of the utility model are:

[0023] The composite drying system adopted in the utility model is to appropriately heat up the inside of the rubber tree seed by high-frequency microwaves, and when removing the surface water of the seed, the internal moisture is partially removed, and this section becomes pre-drying, and then the pre-dried seeds are sent to the constant temperature sealed warehouse. The internal pressure of the seeds at this time is higher than the outside, and the hot air heated by solar energy is sent into the closed silo, and the air that completes the temperature and humidity exchange is taken away by the vacuum pump on the top of the silo at the same time, and the seeds gradually release the internal moisture by gradually reducing the internal temperature and pressure, thereby completing the drying of the rubber tree seeds and performing secondary drying. The drying efficiency of the rubber tree seeds is greatly improved by a variety of drying methods, and at the same time, the active ingredients in the rubber tree seeds are maximized and retained by precise temperature control. The first drying unit of the utility model uses multiple microwave generators to perform multi-stage drying on the materials on the conveyor belt, ensuring that the internal pressure of the seeds is stable and will not burst. The smoke detector under the drying channel detects the smoke generated by the materials dropped from the conveyor belt to the bottom of the drying channel after long-term heating, and promptly reminds the staff to clean up; at the same time, a slow-recovery device is set at the end of the drying channel, so that the materials can quickly exchange heat and moisture under the action of the gradient difference after drying and redistribute them evenly, avoiding shrinkage, hardening and browning of the material surface and affecting the quality of the material. The second slow-recovery drying unit of the utility model is connected to the ventilation duct through the heating device for continuous heating, and uses the vacuum device on the top of the warehouse to continuously draw air out of the warehouse, so that negative pressure is formed in the warehouse, so that the airflow in the warehouse forms a continuous flow from bottom to top, maintaining ventilation and dryness inside the warehouse, so that the materials in the warehouse can be preserved longer and better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic structural diagram of the first drying unit of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the second slow drying unit of the utility model;

[0027] Figure numerals: 1. first drying unit; A. microwave drying channel; 13. slow drying channel; 14-16. temperature sensors; 17. conveyor belt; 2. second slow drying unit; 20. temperature sensors; 21. solar energy; 22. steam energy; 23. fan; 24. vacuum device; 25. vibrator; 26. lower warehouse; 27. middle warehouse; 28. upper warehouse; 29. ​​ventilation duct; 211. feed port; 212. discharge port; 3. lifting mechanism. DETAILED DESCRIPTION

[0028] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] like Figure 1 As shown, the utility model discloses a composite drying equipment, including a first drying unit 1, a slow drying channel 13 and a second slow drying unit 2, the slow drying channel 13 is arranged at the end of the first drying unit 1, and a lifting mechanism 3 is arranged between the slow drying channel 13 and the second slow drying unit 2; the first drying unit 1 is a microwave drying unit; the second slow drying unit 2 is a tower-type constant temperature negative pressure drying unit, a vacuum device 24 is arranged on the top of the second slow drying unit 2, and a ventilation duct 29 is arranged inside, and the ventilation duct 29 is connected to a heating device for providing hot air; the lifting mechanism 3 includes a feeding end and a discharging end, a feeding port 211 is arranged on the top of the second slow drying unit 2, the feeding port 211 is connected to the discharging end of the lifting mechanism 3, and the slow drying channel 13 is connected to the feeding end; the lifting mechanism 3 also includes a conveyor belt and a lifting motor for driving the conveyor belt to move, and the outer surface of the conveyor belt is provided with an anti-slip layer.

[0031] like Figure 2 As shown, the first drying unit 1 is a microwave dryer, including a microwave drying channel A and a slow channel 13, and the slow channel 13 is arranged at the end of the microwave drying channel A; the outlet end of the slow channel 13 is connected to the feed end of the lifting mechanism 3, and a microwave generator is arranged in the microwave drying channel A; each of the microwave generators is provided with a different number of magnetrons according to the heating temperature, and each microwave generator is provided with a microwave power controller, and the number of magnetrons in each microwave generator decreases from the entrance to the exit of the drying channel A, and the magnetrons in each microwave generator are evenly distributed on the upper wall of the microwave generator; the first drying unit 1 also includes a conveyor belt 17, which is a stepless speed conveyor belt, and the conveyor belt 17 passes through the microwave drying channel A and the slow channel 13 in sequence, and is connected to the feed end of the lifting mechanism 3; the slow channel 13 is provided with one or more combinations of a fan, a vacuum pump, and a magnetron.

[0032] like Figure 3 As shown, the second slow drying unit 2 is divided into three sections, which are the upper bin 28, the middle bin 27 and the lower bin 26 from top to bottom. Ventilation ducts 29 and temperature sensors 20 are evenly arranged in the upper bin 28, the middle bin 27 and the lower bin 26. A heating duct is connected between the ventilation duct 29 in each section and the heating device, and temperature control devices are respectively arranged on the three heating pipes. The ventilation duct 29 is an annular ventilation duct, and the temperature sensor 20 is connected to the temperature control device; the lower bin 26 of the second slow drying unit 2 is a funnel-shaped storage area, and a vibrator 25 and a discharge port 212 are arranged at the bottom, and a discharge switch is installed on the discharge port 212. It also includes a heating device and a hot air pipe. The heating device includes one or more combinations of solar energy 21, steam energy 22, electric energy, and biofuel energy. A fan 23 is arranged on the hot air pipe, and the hot air pipe is connected to the annular ventilation duct.

[0033] When the device is used to dry and revive rubber tree seeds, rubber tree seeds are tropical stubborn seeds. The moisture content of fresh seeds is as high as 33%, and there is no dormancy period. Once the temperature is suitable, they will begin to germinate within 7 days, and the storage life under natural conditions is very short. The seed shell is hard and dense, and the shell is wrapped in a layer of wax. The inner layer and the surface of the seed coat are densely covered with fine short hairs, and the water retention performance is extremely strong. Rubber tree seeds fall into rubber forests and are picked up by people. They are infected with various microorganisms in tropical rainforests, and the various enzymes inside the seeds are highly active. They are very easy to heat and mold during storage, causing the rubber tree seed raw materials to deteriorate and cannot be used for subsequent processing. Rubber tree seeds, if the moisture content is less than 10%, will lose vitality. When microwave heating rubber tree seeds, the seeds heat themselves after absorbing microwave energy. The heating process starts from the inside and outside of the object at the same time, that is, it can achieve simultaneous heating inside and outside. Fresh seeds have a moisture content of more than 30%. If the moisture is reduced from 30% to less than 10% at one time with microwaves, a large amount of energy consumption will be brought first. At the same time, the seeds may burst in this process because of uneven internal and external pressures, which is not conducive to subsequent processing. Therefore, the multi-stage slow drying equipment used in the utility model is appropriately heated by the high-frequency microwave in the first drying unit 1. When removing the surface water of the seeds, the internal moisture is partially removed. This section becomes pre-drying, and then the pre-dried seeds are sent to the second slow drying unit 2 by the lifting mechanism 3; the internal pressure of the seeds at this time is higher than the outside, and the hot air heated by solar energy is sent into the closed silo, and the air that completes the temperature and humidity exchange is taken away by the vacuum device 24 at the top of the silo. The seeds are gradually released by gradually reducing the internal temperature and pressure. The internal moisture is gradually released, thereby completing the drying of the rubber tree seeds and performing secondary drying. This drying method utilizes microwave solar energy and wind energy, and a variety of drying methods greatly improve the drying efficiency of rubber tree seeds. At the same time, through precise temperature control, the active ingredients in the rubber tree seeds are maximized.

[0034] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A composite drying device, characterized in that: The invention comprises a first drying unit (1), a slow drying channel (13) and a second slow drying unit (2); the slow drying channel (13) is arranged at the end of the first drying unit (1); a lifting mechanism (3) is arranged between the slow drying channel (13) and the second slow drying unit (2); the first drying unit (1) is a microwave drying unit; the second slow drying unit (2) is a tower-type constant temperature negative pressure drying unit; a vacuum device (24) is arranged on the top of the second slow drying unit (2); a ventilation duct (29) is arranged inside the second slow drying unit (2); the ventilation duct (29) is connected to a heating device for providing hot air.

2. A composite drying device according to claim 1, characterized in that: The lifting mechanism (3) comprises a feed end and a discharge end, a feed port (211) is provided at the top of the second slow drying unit (2), the feed port (211) is connected to the discharge end of the lifting mechanism (3), and the slow drying channel (13) is connected to the feed end.

3. A composite drying device according to claim 2, characterized in that: The first drying unit (1) further comprises a microwave drying channel (A) and a conveyor belt (17), wherein the conveyor belt (17) passes through the microwave drying channel (A) and the slow drying channel (13) in sequence and is connected to the feed end of the lifting mechanism (3).

4. A composite drying device according to claim 3, characterized in that: A microwave generator is arranged in the microwave drying channel (A); each microwave generator is provided with a different number of magnetrons according to the heating temperature, each microwave generator is provided with a microwave power controller, the number of magnetrons in each microwave generator decreases from the entrance to the exit of the drying channel (A), and the magnetrons in each microwave generator are evenly distributed on the upper wall of the microwave generator.

5. A composite drying device according to claim 3, characterized in that: A dehumidification device is arranged above the drying channel (A), and the dehumidification device is connected to each microwave generator through a dehumidification pipeline.

6. A composite drying device according to claim 5, characterized in that: The second slow drying unit (2) is divided into three sections, which are, from top to bottom, an upper section bin (28), a middle section bin (27) and a lower section bin (26). Ventilation ducts (29) and temperature sensors (20) are evenly arranged in the upper section bin (28), the middle section bin (27) and the lower section bin (26). A heating duct is respectively connected between the ventilation duct (29) in each section and the heating device. Temperature control devices are respectively arranged on the three heating ducts. The ventilation duct (29) is a ring-shaped ventilation duct, and the temperature sensor (20) is connected to the temperature control device.

7. A composite drying device according to claim 6, characterized in that: The lower bin (26) of the second slow drying unit (2) is a funnel-shaped material storage area, with a vibrator (25) and a material discharge port (212) provided at the bottom, and a material discharge switch installed on the material discharge port (212).

8. A composite drying device according to claim 7, characterized in that: The heating device comprises one or more combinations of solar energy (21), steam energy (22), electric energy, and biofuel energy. A fan (23) is arranged on the hot air pipe, and the hot air pipe is connected to the annular ventilation duct.

9. The composite drying device according to claim 1, characterized in that: One or more combinations of a fan, a vacuum pump, and a magnetron are arranged in the slow-release channel (13).

10. The composite drying device according to claim 2, characterized in that: The lifting mechanism (3) also includes a conveyor belt and a lifting motor for driving the conveyor belt to move, and an anti-slip layer is provided on the outer surface of the conveyor belt.

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