CN115900304B - Grain sterilizing and drying equipment and method - Google Patents
Grain sterilizing and drying equipment and method Download PDFInfo
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- CN115900304B CN115900304B CN202211719005.0A CN202211719005A CN115900304B CN 115900304 B CN115900304 B CN 115900304B CN 202211719005 A CN202211719005 A CN 202211719005A CN 115900304 B CN115900304 B CN 115900304B
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- Drying Of Solid Materials (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention discloses grain sterilizing and drying equipment and a method, wherein the equipment comprises a drying chamber, a combustion chamber, a first fan and a sterilizing device, wherein a first convection pipeline and a second convection pipeline are respectively arranged on two sides of the drying chamber, a material lifting and circulating device is arranged on the drying chamber, one side of the combustion chamber is communicated with air, the other side of the combustion chamber is communicated with the first convection pipeline, one side of the first fan is communicated with the second convection pipeline, the other side of the first fan is communicated with air, the sterilizing device comprises an air inlet and an air outlet, the air inlet is connected with the second convection pipeline, the air outlet is connected with the first convection pipeline, the sterilizing device is internally provided with the second fan, a pulse plasma discharge assembly and a pulse plasma discharge power supply, and the pulse plasma discharge power supply is electrically connected with the pulse plasma discharge assembly. The method can thoroughly solve the defects of the existing disinfection method, so that the disinfection is complete, no damage is caused to seeds, and the equipment has simple working flow, convenient operation and strong controllability.
Description
Technical Field
The invention relates to the technical field of grain treatment devices, in particular to grain sterilizing and drying equipment and method.
Background
At present, the seeds are preserved by shining or drying the seeds by a low-temperature dryer until the seeds reach the required moisture, so that the seeds cannot be moist, rotten and spoiled, but pathogenic germs, microorganisms and the like are attached to the surfaces of grains in the storage process, the germs cannot be killed comprehensively due to normal drying, the quality of the seeds is greatly influenced due to the fact that the germs spoil and become mildewed, and the problems of low germination rate, low yield and the like in the later period are caused. Therefore, conventional sterilization treatments are required prior to seed storage or sowing.
Seed kill in common use today includes: 1. the physical disinfection method mainly utilizes means such as heating power, freezing, drying, electromagnetic waves, ultrasonic waves, microwaves and the like to inhibit, passivate or kill pathogens so as to achieve the purpose of preventing and treating diseases; sun exposure is only suitable for flower seeds which are not easy to lose germination rate under sun exposure; the method is only suitable for black pine, biota orientalis, bitter plants, chinese pine, larch and the like, and the hot water temperature and the seed soaking time are strictly controlled in the seed soaking process of the warm soup, so that pathogenic bacteria are killed and the seeds are not scalded. 2. The chemical sterilization method comprises the following chemical agents of meromel cyanide, methoxyl ethyl mercury acetate, formalin, potassium permanganate, carbendazim, thiram, ferrous sulfate, copper sulfate, degerming and the like; the seed soaking agent can treat seeds, bulbs, root systems and the like of flowers and trees, the seeds can be sown after being stored in a sealed warehouse or room for 24 hours after being soaked, and the seeds are required to be dried after being soaked; meanwhile, the proportion of the drug amount, the water amount and the seed amount for seed soaking disinfection is strictly controlled, and the concentration of the drug solution cannot be changed at will so as not to influence the germination condition of seeds or reduce the prevention effect on diseases; because the concentration of the used medicament is higher, the harm to human bodies is also larger, and the human bodies are easy to poison, the medication safety is required to be paid attention in the specific operation process. 3. Biological disinfection methods, biological control applied to seed treatment comprises the steps of utilizing beneficial microorganisms, promoting rhizosphere bacteria for plant growth and biological agents with control effects on plant diseases to be used as seed soaking, seed dressing or microorganism coating agents, such as common seed dressing beneficial microorganisms including bacillus subtilis, pythium oligandrum, trichoderma harzianum and the like, wherein the traditional biological disinfection technology has a slower disinfection process, has incomplete and reliable killing effects on harmful organisms, has no general killing effect on bacterial spores with strong resistance, and has the problems that the disinfection effect is difficult to determine, the disinfection efficiency is low, the large-scale application is not easy, and the like.
The seed disinfection method is carried out separately from seed drying, and the seed disinfection process is complex and the disinfection effect is poor.
Disclosure of Invention
In order to solve the problems, the technical scheme provided by the invention is as follows:
The utility model provides a grain kills drying equipment, includes drying chamber, combustion chamber, first fan and kills the device, the both sides of drying chamber are equipped with first convection current pipeline and second convection current pipeline respectively, be equipped with material lifting cycle device on the drying chamber, one side and the air intercommunication of combustion chamber, the opposite side of combustion chamber with first convection current pipeline intercommunication, one side of first fan with second convection current pipeline intercommunication, the opposite side of first fan with the air intercommunication, the device that kills includes air inlet and gas outlet, the air inlet with second convection current pipeline connection, the gas outlet with first convection current pipeline connection, be provided with second fan, pulse plasma discharge subassembly and pulse plasma power supply in the device that kills, pulse plasma power supply with pulse plasma discharge subassembly electricity is connected.
The invention further provides a controller which is electrically connected with the first fan, the second fan, the combustion chamber, the pulse discharge plasma power supply and the material lifting circulation device respectively.
The invention further provides that a first valve switch is arranged between the combustion chamber and the first convection pipeline, a second valve switch is arranged between the first fan and the second convection pipeline, a third valve switch is arranged between the air inlet and the second convection pipeline, a fourth valve switch is arranged between the air outlet and the first convection pipeline, and the controller is respectively and electrically connected with the first valve switch, the second valve switch, the third valve switch and the fourth valve switch.
The invention is further arranged in the disinfection device, a filtering area, a reaction area and an electric area are arranged in the filtering area, a filtering layer is arranged in the filtering area, the filtering layer is arranged close to the air inlet, the second fan is arranged on one side of the filtering layer, which is far away from the air inlet, the pulse plasma discharge assembly is arranged in the reaction area, the inlet of the reaction area is communicated with the filtering area, the outlet of the reaction area is communicated with the air outlet, the pulse discharge plasma power supply is arranged in the electric area, and the electric area is independent of the filtering area and the reaction area.
The pulse plasma discharge assembly further comprises a grounding frame and discharge electrode wires, wherein the grounding frame comprises fixing plates, fixing supports and grounding electrode tubes, the fixing plates are connected to the inner wall of the disinfection device, the grounding electrode tube arrays are arranged between the fixing plates, the fixing supports are connected to the fixing plates and are located at two ends of the grounding electrode tubes, the grounding electrode tubes are hollow tubes, the discharge electrode wires are arranged in the grounding electrode tubes, two ends of the discharge electrode wires are respectively connected to the fixing supports, and the discharge electrode wires are electrically connected with the output ends of the power supply module.
The invention further provides that the discharge electrode wire comprises an electrode wire main body, discharge sheets sleeved on the electrode wire main body, cylindrical clamping barrels arranged between the discharge sheets and conical clamping barrels arranged at two ends of the electrode wire main body, convex discharge parts are uniformly arranged on the periphery of the discharge sheets, positioning grooves and positioning blocks are respectively arranged on the periphery of the upper end face and the lower end face of the cylindrical clamping barrel and the periphery of the end face, close to the discharge sheets, of the conical clamping barrels, the positioning grooves and the positioning blocks on the upper end face of the cylindrical clamping barrels are arranged in a staggered mode with the positioning grooves and the positioning blocks on the lower end face of the same cylindrical clamping barrel, the discharge parts are limited between the positioning grooves and the positioning blocks adjacent to the discharge parts, the discharge parts protrude out of the surfaces of the cylindrical clamping barrels and the surfaces of the conical clamping barrels, and the discharge parts adjacent to the discharge sheets are arranged in a staggered mode along the axis direction of the electrode wire main body.
The invention further provides that an oxidizing substance detecting instrument is arranged in the drying chamber or the first convection pipeline, and the oxidizing substance detecting instrument is electrically connected with the controller.
The invention further provides that a temperature instrument and a pressure instrument are arranged in the drying chamber or the first convection pipeline, and the temperature instrument and the pressure instrument are respectively and electrically connected with the controller.
The invention further provides that the first fan and the second fan are both axial fans.
The grain sterilizing and drying method adopts the grain sterilizing and drying equipment and comprises the following steps:
The controller controls the second fan and the material lifting circulation device to work, so that air in the equipment is circulated internally and grains in the equipment are circulated longitudinally; the controller controls the pulse discharge plasma power supply to run in a first power interval, gas in the drying chamber enters the air inlet of the sterilizing device from the second convection pipeline, the gas enters the reaction zone through the filtration of the filter layer, the discharge end of the discharge electrode wire discharges the gas to generate ozone, and the gas rich in ozone is discharged from the first convection pipeline to sterilize grains which are circulating longitudinally; the method comprises the steps that an oxidizing substance detection instrument monitors the ozone concentration of gas in the equipment, and a controller adjusts the output power of a pulse discharge plasma power supply according to ozone concentration information fed back by the oxidizing substance detection instrument, so that the ozone concentration of the gas in the equipment is in a preset disinfection threshold value; after the sterilization is finished, the controller controls the pulse discharge plasma power supply to run in a second power interval, and the discharge end of the discharge electrode wire is decomposed through ozone gas in the reaction zone until the oxidizing substance detection instrument monitors that the ozone concentration of the gas in the equipment is lower than a preset ending threshold value;
The controller is used for controlling the first fan and the material lifting circulation device to work, so that air in the equipment is subjected to external circulation and grains in the equipment are subjected to longitudinal circulation; the controller controls the combustion chamber to work, external air flows from the first convection pipeline to the drying chamber through the heating of the combustion chamber, the heated air fully contacts with grains, takes away moisture in the grains, and is discharged to the external air from the second convection pipeline; the temperature instrument monitors the air temperature of the gas in the equipment, and the controller adjusts the heating degree of the combustion chamber according to the air temperature information fed back by the temperature instrument so that the air temperature of the gas in the equipment is at a preset temperature threshold; the pressure instrument monitors the pressure of the gas in the equipment, and the controller carries out pipeline blockage prompt and shutdown according to the gas pressure information fed back by the pressure instrument.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
According to the grain sterilizing and drying equipment, the pulse discharge sterilizing device is combined with the dryer, the corresponding valve switch is selectively opened in the lifting circulation process by utilizing grain seeds to perform external circulation drying and internal circulation sterilizing, the defects of the existing sterilizing method can be thoroughly overcome, the sterilizing is complete, no damage is caused to the seeds, the equipment work flow is simple, the operation is convenient, and the controllability is strong.
The principle of the disinfection device of the invention is as follows: the controller controls the pulse discharge plasma power supply to carry out high-power output, the discharge electrode wire corona discharge of the reaction area generates a strong electric field area, so that a large amount of high-energy electrons, free radicals, free radical derived oxidizing substances and other active particles are generated in the reaction area, wherein the oxygen free radicals act on pathogenic bacteria of seeds to lose activity, and when the pathogenic bacteria enter the strong electric field area of the reaction module, the pathogenic bacteria can play a role in killing bacteria and mould microorganisms, and the oxygen free radicals act on cell membranes firstly, so that the components of the cell membranes are damaged, metabolic barriers are caused, the growth of the cell membranes is inhibited, and the oxygen free radicals continue to permeate and destroy lipoproteins and lipopolysaccharides in the membranes to change the permeability of cells, so that the cells are dissolved and dead. When the ozone concentration in the drying chamber needs to be reduced after the sterilization for a period of time, the controller controls the pulse discharge plasma power supply to carry out low-power output, and the discharge electrode wires in the reaction area decompose the ozone passing through the reaction area, so that the ozone concentration in the gas is reduced rapidly. The sterilizing device has the characteristics of stable discharge, high intensity, uniform discharge, good sterilizing effect and the like, and can be perfectly matched with grain drying equipment.
The grain sterilizing and drying method is automatically controlled in the whole process, a first fan, a second fan, a material lifting and circulating device, an oxidizing substance detecting instrument, a temperature instrument and a pressure instrument are integrated on equipment, and the power supply power and the voltage output are correspondingly adjusted along with the real-time fluctuation of circulating gas by collecting feedback signals in real time and performing integrated control. By means of the key technology of matching the pulse discharge plasma power supply and the pulse plasma discharge body, the grain sterilizing and drying device can realize high-low power matching operation.
Drawings
Fig. 1 is a perspective view of a grain sterilizing and drying apparatus according to an embodiment of the present invention.
Fig. 2 is a front view of a grain sterilizing and drying apparatus according to an embodiment of the present invention.
Fig. 3 is an internal schematic view of the killing device according to the embodiment of the invention.
FIG. 4 is a schematic diagram of an embodiment of an internal pulse plasma discharge assembly.
Fig. 5 is a perspective view of a discharge line according to an embodiment of the present invention.
Fig. 6 is a partial exploded view of a discharge line according to an embodiment of the present invention.
FIG. 7 is a schematic diagram of discharging a gas flowing through a discharge electrode line according to an embodiment of the present invention.
FIG. 8 is a schematic diagram illustrating a cross-sectional discharge of a discharge line according to an embodiment of the present invention.
FIG. 9 is a schematic diagram of the gas flow direction of the apparatus according to an embodiment of the present invention.
Fig. 10 is an electrical control schematic diagram of a grain sterilizing and drying apparatus according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; can be mechanical connection or electric connection, or can be communication between two elements; may be directly connected or indirectly connected through an intermediate medium, and the specific meaning of the above terms will be understood by those skilled in the art according to the specific circumstances.
Example 1
Referring to fig. 1 to 10, the technical scheme of the invention is a grain sterilizing and drying device, which comprises a drying chamber 1, a combustion chamber 2, a first fan 3 and a sterilizing device 4, wherein a first convection pipeline 11 and a second convection pipeline 12 are respectively arranged on two sides of the drying chamber 1, a material lifting circulation device 9 is arranged on the drying chamber 1, one side of the combustion chamber 2 is communicated with air, the other side of the combustion chamber 2 is communicated with the first convection pipeline 11, one side of the first fan 3 is communicated with the second convection pipeline 12, the other side of the first fan 3 is communicated with air, the sterilizing device 4 comprises an air inlet 41 and an air outlet 42, the air inlet 41 is connected with the second convection pipeline 12, the air outlet 42 is connected with the first convection pipeline 11, a second fan 5, a pulse plasma discharge assembly 6 and a pulse plasma power supply 7 are arranged in the sterilizing device 4, and the pulse plasma power supply 7 is electrically connected with the pulse plasma discharge assembly 6.
In the above embodiment, grains or other seeds are stored in the drying chamber 1, the material lifting circulation device 9 lifts the grains in the drying chamber 1 to a high position and makes the grains fall freely, so that the grains can be lifted and circulated continuously, and the first convection pipeline 11 and the second convection pipeline 12 are respectively disposed at two sides of the drying chamber 1, so that the gas exhausted by the first convection pipeline 11 can sufficiently dry or kill the grains falling freely.
In the above embodiment, the first fan 3 is a power source for drying grains; the second fan 5 is a power source for killing grains.
In the above embodiment, the pulse discharge plasma power supply 7 may output different powers to the pulse plasma discharge assembly 6, and the pulse discharge plasma power supply 7 has a stepless regulation function; when the pulse discharge plasma power supply 7 outputs high power, the pulse plasma discharge assembly 6 generates a high-intensity electric field, so that a large amount of high-energy electrons, free radicals, free radical derived oxidative substances (ozone) and other active particles are generated in the reaction zone; when the pulse discharge plasma power supply 7 outputs low power, the pulse plasma discharge assembly 6 is caused to decompose ozone in the gas. The specific power range is not limited, and is related to the number of discharge lines in the reaction region, the distance between the discharge sheets, and the like.
In this embodiment, the apparatus further includes a controller 8, where the controller 8 is electrically connected to the first fan 3, the second fan 5, the combustion chamber 2, the pulse discharge plasma power supply 7, and the material lifting circulation device 9, respectively.
In the above embodiment, the controller 8 is configured to control the electrical operation in the apparatus, for example, to drive the first fan 3 and the second fan 5 to rotate, so that the combustion chamber 2 heats the air entering the combustion chamber, and control the pulse discharge plasma power supply 7 to output different powers. The controller 8 is a Programmable Logic Controller (PLC) and in further embodiments the automation control component 5 may also be a Microcontroller (MCU).
In this embodiment, a first valve switch 13 is disposed between the combustion chamber 2 and the first convection duct 11, a second valve switch 14 is disposed between the first fan 3 and the second convection duct 12, a third valve switch 15 is disposed between the air inlet 41 and the second convection duct 12, a fourth valve switch 16 is disposed between the air outlet 42 and the first convection duct 11, and the controller 8 is electrically connected to the first valve switch 13, the second valve switch 14, the third valve switch 15 and the fourth valve switch 16, respectively.
In the above embodiment, the opening and closing of the first valve switch 13, the second valve switch 14, the third valve switch 15, and the fourth valve switch 16 are controlled by the controller 8; when the first valve switch 13 and the second valve switch 14 are open and the third valve switch 15 and the fourth valve switch 16 are closed, the drying chamber of the apparatus is in communication with the outside, i.e. a drying phase of the external circulation is performed; when the third valve switch 15 and the fourth valve switch 16 are open and the first valve switch 13 and the second valve switch 14 are closed, the drying chamber of the apparatus is not open to the outside, i.e. the disinfection phase of the internal circulation is performed.
In this embodiment, a filtering area 43, a reaction area 44 and an electric area 45 are disposed in the disinfecting device 4, a filtering layer 46 is disposed in the filtering area 43, the filtering layer 46 is disposed near the air inlet 41, the second fan 5 is disposed on one side of the filtering layer 46 away from the air inlet 41, the pulsed plasma discharge assembly 6 is disposed in the reaction area 44, an inlet of the reaction area 44 is communicated with the filtering area 43, an outlet of the reaction area 44 is communicated with the air outlet 42, the pulsed plasma power supply 7 is disposed in the electric area 45, and the electric area 45 is disposed independently of the filtering area 43 and the reaction area 44.
In the above embodiment, the gas entering the sterilizing device 4 is filtered first, and then enters the reaction zone for reaction; the sterilizing device 4 has the characteristics of stable discharge, high intensity, uniform discharge, good sterilizing effect and the like, and can be perfectly matched with grain drying equipment.
In this embodiment, the pulsed plasma discharge assembly 6 includes a grounding frame 61 and a discharge electrode wire 62, the grounding frame 61 includes a fixing plate 611, a fixing bracket 612 and a grounding electrode tube 613, the fixing plate 611 is connected to the inner wall of the sterilization device 4, the grounding electrode tube 613 is arranged between the fixing plates 611 in an array, the fixing bracket 612 is connected to the fixing plate 611 and is located at two ends of the grounding electrode tube 613, the grounding electrode tube 613 is a hollow tube body, the discharge electrode wire 62 is disposed in the grounding electrode tube 613, two ends of the discharge electrode wire 62 are respectively connected to the fixing bracket 612, and the discharge electrode wire 62 is electrically connected to the output end of the power module 7.
In the above embodiment, the fixing bracket 612 is used for precisely positioning the discharge wires 62 in the grounding electrode tubes 613, and the through holes at the two ends of each grounding electrode tube 613 are the inlet and the outlet of the reaction zone 44.
In this embodiment, the discharge electrode wire 62 includes a wire main body 621, a discharge sheet 622 sleeved on the wire main body 621, a cylindrical card barrel 623 disposed between the discharge sheets 622, and a conical card barrel 624 disposed at two ends of the wire main body 621, wherein convex discharge portions 6221 are uniformly disposed on the outer periphery of the discharge sheet 622, positioning grooves 6231 and positioning blocks 6232 are disposed on the periphery of the upper and lower end surfaces of the cylindrical card barrel 623, positioning grooves 6241 and positioning blocks 6242 are disposed on the periphery of the end surface of the conical card barrel 624, which is close to the discharge sheet 622, the positioning grooves 6231 and the positioning blocks 6232 on the upper end surface of the cylindrical card barrel 623 are disposed in a staggered manner with the positioning grooves 6231 and the positioning blocks 6232 on the lower end surface of the same cylindrical card barrel 623, the discharge portions 6221 are limited between the positioning grooves and the positioning blocks adjacent to the discharge portions 6221, and the discharge portions 6221 are protruded on the surface of the cylindrical card barrel 623 and the surface of the conical card barrel 624, and the positioning grooves 6241 and the positioning grooves 6232 are disposed in a staggered manner along the axial direction of the discharge body 621 of the adjacent to the cylindrical card barrel 623.
In the above embodiment, as shown in fig. 5 to 8, the discharge electrode wire 62 is completely positioned by the cylindrical clamping barrel 623 and the conical clamping barrel 624, the whole electrode wire is in a shuttle shape, only the discharge portion 6221 protrudes from the surface, the discharge electrode wire 62 is convenient to assemble, maintain and replace, the cost is effectively reduced, the discharge sheet 622 is not easy to deform, the clamping barrel is arranged on the surface of the electrode wire main body 621 to form a frame structure of the electrode wire, and the whole rigidity and bending resistance of the discharge electrode wire are improved; and the resistance is small when the air flow passes through the discharge electrode wires, the air flow is smoothly conveyed, and the area through which the air flow flows is almost the pulse plasma area, so that the reaction efficiency of the air is improved.
In this embodiment, an oxidizing substance detecting instrument 17 is disposed in the drying chamber 1 or the first convection duct 11, and the oxidizing substance detecting instrument 17 is electrically connected to the controller 8; the oxidizing substance detecting instrument 17 monitors the ozone concentration of the gas in the equipment, and the controller adjusts the output power of the pulse discharge plasma power supply according to the ozone concentration information fed back by the oxidizing substance detecting instrument.
In this embodiment, a temperature meter 18 and a pressure meter 19 are disposed in the drying chamber 1 or the first convection duct 11, and the temperature meter 18 and the pressure meter 19 are electrically connected to the controller 8 respectively; the temperature meter 18 monitors the temperature of the gas in the equipment, so that the air outside the equipment is blown out of the air flow with preset temperature for drying after passing through the combustion chamber 2; the pressure meter 19 monitors the gas pressure inside the equipment and prevents the inlet and outlet of the equipment from being blocked to influence the normal operation of the equipment.
In this embodiment, the first fan 3 and the second fan 5 are both axial flow fans, specifically an explosion-proof axial flow fan.
The grain sterilizing and drying equipment combines the pulse discharge sterilizing device with the dryer, and utilizes the grain seeds to selectively open corresponding valve switches in the lifting circulation process to perform external circulation drying and internal circulation sterilizing, so that the defects of the existing sterilizing method can be thoroughly overcome, the sterilizing is complete, no damage is caused to the seeds, and the equipment has the advantages of simple working flow, convenient operation and strong controllability.
Example 2
Referring to fig. 1 to 10, the technical scheme of the invention is a grain sterilizing and drying method, which adopts the grain sterilizing and drying equipment of the embodiment 1, and comprises the following steps:
The controller controls the second fan and the material lifting circulation device to work, so that air in the equipment is circulated internally and grains in the equipment are circulated longitudinally; the controller controls the pulse discharge plasma power supply to run in a first power interval, gas in the drying chamber enters the air inlet of the sterilizing device from the second convection pipeline, the gas enters the reaction zone through the filtration of the filter layer, the discharge end of the discharge electrode wire discharges the gas to generate ozone, and the gas rich in ozone is discharged from the first convection pipeline to sterilize grains which are circulating longitudinally; the method comprises the steps that an oxidizing substance detection instrument monitors the ozone concentration of gas in the equipment, and a controller adjusts the output power of a pulse discharge plasma power supply according to ozone concentration information fed back by the oxidizing substance detection instrument, so that the ozone concentration of the gas in the equipment is in a preset disinfection threshold value; after the sterilization is finished, the controller controls the pulse discharge plasma power supply to run in a second power interval, and the discharge end of the discharge electrode wire is decomposed through ozone gas in the reaction zone until the oxidizing substance detection instrument monitors that the ozone concentration of the gas in the equipment is lower than a preset ending threshold value;
The controller is used for controlling the first fan and the material lifting circulation device to work, so that air in the equipment is subjected to external circulation and grains in the equipment are subjected to longitudinal circulation; the controller controls the combustion chamber to work, external air flows from the first convection pipeline to the drying chamber through the heating of the combustion chamber, the heated air fully contacts with grains, takes away moisture in the grains, and is discharged to the external air from the second convection pipeline; the temperature instrument monitors the air temperature of the gas in the equipment, and the controller adjusts the heating degree of the combustion chamber according to the air temperature information fed back by the temperature instrument so that the air temperature of the gas in the equipment is at a preset temperature threshold; the pressure instrument monitors the pressure of the gas in the equipment, and the controller carries out pipeline blockage prompt and shutdown according to the gas pressure information fed back by the pressure instrument.
The principle of the disinfection device in the invention is as follows: the controller controls the pulse discharge plasma power supply to carry out high-power output, the discharge electrode wire corona discharge of the reaction area generates a strong electric field area, so that a large amount of high-energy electrons, free radicals, free radical derived oxidative substances (ozone) and other active particles are generated in the reaction area, wherein the oxygen free radicals act on pathogenic bacteria of seeds to cause the loss of activity, when the pathogenic bacteria enter the strong electric field area of the reaction module, the pathogenic bacteria can also play a role in killing bacteria and mold microorganisms, and the oxygen free radicals act on cell membranes firstly, so that the constitution of the cell membranes is damaged, metabolic disorder is caused, the growth of the cell membranes is inhibited, the oxygen free radicals continue to permeate and destroy lipoproteins and lipopolysaccharides in the membranes, the cell permeability is changed, and the cell dissolution and death are caused. When the ozone concentration in the drying chamber needs to be reduced after the sterilization for a period of time, the controller controls the pulse discharge plasma power supply to carry out low-power output, and the discharge electrode wires in the reaction area decompose the ozone passing through the reaction area, so that the ozone concentration in the gas is reduced rapidly. It is well known that ozone is more active than oxygen, the bond energy of ozone is much lower than that of oxygen, and is more easily ionized, so that the power of the power supply is reduced, when the power is reduced to the level that oxygen is not ionized but ozone can be ionized, the ozone is ionized and decomposed into oxygen, and the purpose of eliminating ozone is achieved. The sterilizing device has the characteristics of stable discharge, high intensity, uniform discharge, good sterilizing effect and the like, and can be perfectly matched with grain drying equipment.
The grain sterilizing and drying method is automatically controlled in the whole process, a first fan, a second fan, a material lifting and circulating device, an oxidizing substance detecting instrument, a temperature instrument and a pressure instrument are integrated on equipment, and the power supply power and the voltage output are correspondingly adjusted along with the real-time fluctuation of circulating gas by collecting feedback signals in real time and performing integrated control. By means of the key technology that the pulse discharge plasma power supply and the pulse plasma discharge body are matched, the grain sterilizing and drying device can realize high-low power matching operation, and therefore quick switching between a sterilizing mode and a drying mode is realized.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (6)
1. The grain sterilizing and drying device is characterized by comprising a drying chamber, a combustion chamber, a first fan and a sterilizing device, wherein a first convection pipeline and a second convection pipeline are respectively arranged on two sides of the drying chamber, a material lifting and circulating device is arranged on the drying chamber, one side of the combustion chamber is communicated with air, the other side of the combustion chamber is communicated with the first convection pipeline, one side of the first fan is communicated with the second convection pipeline, the other side of the first fan is communicated with the air, the sterilizing device comprises an air inlet and an air outlet, the air inlet is connected with the second convection pipeline, the air outlet is connected with the first convection pipeline, a second fan, a pulse plasma discharge assembly and a pulse plasma discharge power supply are arranged in the sterilizing device, and the pulse plasma discharge power supply is electrically connected with the pulse plasma discharge assembly;
the controller is electrically connected with the first fan, the second fan, the combustion chamber, the pulse discharge plasma power supply and the material lifting circulation device respectively;
The sterilizing device is internally provided with a filtering area, a reaction area and an electric area, wherein a filtering layer is arranged in the filtering area, the filtering layer is arranged close to the air inlet, the second fan is arranged on one side of the filtering layer away from the air inlet, the pulse plasma discharging assembly is arranged in the reaction area, the inlet of the reaction area is communicated with the filtering area, the outlet of the reaction area is communicated with the air outlet, the pulse plasma discharging power supply is arranged in the electric area, and the electric area is independent of the filtering area and the reaction area;
The pulse plasma discharge assembly comprises a grounding rack and a discharge electrode wire, the grounding rack comprises a fixed plate, a fixed support and a grounding electrode tube, the fixed plate is connected to the inner wall of the disinfection device, the grounding electrode tube array is arranged between the fixed plates, the fixed support is connected to the fixed plate and located at two ends of the grounding electrode tube, the grounding electrode tube is a hollow tube body, the discharge electrode wire is arranged in the grounding electrode tube, two ends of the discharge electrode wire are respectively connected to the fixed support, and the discharge electrode wire is electrically connected with the output end of the power module;
The utility model provides a discharge polar line, including the polar line main part, the cover is established discharge sheet in the polar line main part, set up between the discharge sheet cylindricality card bucket and set up the toper card bucket at polar line main part both ends, the periphery of discharge sheet evenly is equipped with bellied discharge portion, cylindricality card bucket upper and lower terminal surface periphery with the toper card bucket is close to the terminal surface periphery of discharge sheet all is equipped with constant head tank and locating piece, cylindricality card bucket up end the constant head tank with the locating piece with same cylindricality card bucket lower terminal surface the constant head tank with the locating piece dislocation set, discharge portion limit in this discharge portion is adjacent between the constant head tank with the locating piece, just discharge portion protrusion in the surface of cylindricality card bucket with the surface of toper card bucket, adjacent discharge portion of discharge sheet is followed the axis direction dislocation set of polar line main part.
2. The grain disinfection and drying apparatus according to claim 1, wherein a first valve switch is provided between the combustion chamber and the first convection duct, a second valve switch is provided between the first fan and the second convection duct, a third valve switch is provided between the air inlet and the second convection duct, a fourth valve switch is provided between the air outlet and the first convection duct, and the controller is electrically connected to the first valve switch, the second valve switch, the third valve switch, and the fourth valve switch, respectively.
3. The grain sterilizing and drying apparatus according to claim 1, wherein an oxidizing substance detecting instrument is provided in the drying chamber or the first convection duct, and the oxidizing substance detecting instrument is electrically connected to the controller.
4. The grain sterilizing and drying apparatus according to claim 1, wherein a temperature meter and a pressure meter are provided in the drying chamber or the first convection duct, and the temperature meter and the pressure meter are electrically connected to the controller, respectively.
5. The grain sterilizing and drying apparatus according to any one of claims 1 to 4, wherein the first fan and the second fan are both axial flow fans.
6. A grain sterilizing and drying method, characterized in that the grain sterilizing and drying apparatus according to any one of claims 1 to 5 is employed, comprising:
The controller controls the second fan and the material lifting circulation device to work, so that air in the equipment is circulated internally and grains in the equipment are circulated longitudinally; the controller controls the pulse discharge plasma power supply to run in a first power interval, gas in the drying chamber enters the air inlet of the sterilizing device from the second convection pipeline, the gas enters the reaction zone through the filtration of the filter layer, the discharge end of the discharge electrode wire discharges the gas to generate ozone, and the gas rich in ozone is discharged from the first convection pipeline to sterilize grains which are circulating longitudinally; the method comprises the steps that an oxidizing substance detection instrument monitors the ozone concentration of gas in the equipment, and a controller adjusts the output power of a pulse discharge plasma power supply according to ozone concentration information fed back by the oxidizing substance detection instrument, so that the ozone concentration of the gas in the equipment is in a preset disinfection threshold value; after the sterilization is finished, the controller controls the pulse discharge plasma power supply to run in a second power interval, and the discharge end of the discharge electrode wire is decomposed through ozone gas in the reaction zone until the oxidizing substance detection instrument monitors that the ozone concentration of the gas in the equipment is lower than a preset ending threshold value;
The controller is used for controlling the first fan and the material lifting circulation device to work, so that air in the equipment is subjected to external circulation and grains in the equipment are subjected to longitudinal circulation; the controller controls the combustion chamber to work, external air flows from the first convection pipeline to the drying chamber through the heating of the combustion chamber, the heated air fully contacts with grains, takes away moisture in the grains, and is discharged to the external air from the second convection pipeline; the temperature instrument monitors the air temperature of the gas in the equipment, and the controller adjusts the heating degree of the combustion chamber according to the air temperature information fed back by the temperature instrument so that the air temperature of the gas in the equipment is at a preset temperature threshold; the pressure instrument monitors the pressure of the gas in the equipment, and the controller carries out pipeline blockage prompt and shutdown according to the gas pressure information fed back by the pressure instrument.
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| CN202620303U (en) * | 2012-05-22 | 2012-12-26 | 江苏天安粮储设备有限公司 | Granary ozone processor |
| CN103070232A (en) * | 2013-01-18 | 2013-05-01 | 华南农业大学 | Low-temperature circulation dryer for crop seeds |
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| KR20100083936A (en) * | 2009-01-15 | 2010-07-23 | (주)한일에스티엠 | A preservatiing apparatus for cereals |
| KR20160058797A (en) * | 2013-08-30 | 2016-05-25 | 홋카이도 도쿠슈시료우 가부시키가이샤 | Drying method, drying device, and drying system making use of temperature differential |
| CN106615089A (en) * | 2016-12-28 | 2017-05-10 | 江苏金翔环保科技有限公司 | Ozone recirculation fumigation method in grain depots |
| CN206867962U (en) * | 2017-05-31 | 2018-01-12 | 山东艾派仕环保科技有限公司 | High pressure ionization decomposing, purifying tower |
| CN108755833A (en) * | 2018-08-23 | 2018-11-06 | 成都市孔宣农业科技有限公司 | A kind of recovery method and system of plant moisture |
| KR20200027389A (en) * | 2018-09-04 | 2020-03-12 | 석 규 이 | A system that adds natural minerals to manufactured foods and manufactures them for oral administration |
| CN110425861B (en) * | 2019-08-26 | 2020-06-30 | 安徽金锡机械科技有限公司 | Circulating high-voltage electric field grain seed drying machine |
| CN111076526A (en) * | 2019-12-31 | 2020-04-28 | 湖北佳粮机械股份有限公司 | Batch type grain circulating dryer |
| CN214950470U (en) * | 2021-04-30 | 2021-11-30 | 甘肃极地阳光新能源科技有限公司 | Air energy grain drying device |
| CN215295748U (en) * | 2021-06-22 | 2021-12-24 | 合肥三伍机械有限公司 | Separating grain quick drying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202620303U (en) * | 2012-05-22 | 2012-12-26 | 江苏天安粮储设备有限公司 | Granary ozone processor |
| CN103070232A (en) * | 2013-01-18 | 2013-05-01 | 华南农业大学 | Low-temperature circulation dryer for crop seeds |
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