CN209639385U - A kind of drying system of ion wind composite membrane air-to-air total heat exchanger - Google Patents

Abstract

The utility model relates to a drying system for an ion wind composite membrane total heat exchanger, comprising a box body, an ion wind generating device and a circulating air path; the ion wind generating device is located in the box and forms an ion wind to speed up the The moisture evaporation rate of the material to be dried in the box; the circulating air path is located on the outside of the box and communicated with the box to circulate the low-temperature and high-humidity air in the box. There is also a dehumidification and heating device for exchanging heat and water molecules between the low-temperature and high-humidity air inside the box and the high-temperature and low-humidity air outside the box. The beneficial effect of the utility model is: combining the electrohydrodynamic drying machine and the membrane type total heat exchanger, designing a new type of electrohydrodynamic drying and membrane type heat exchanger device, which not only improves the drying quality of materials , thermal efficiency, and reduce the operating costs in the later period, energy saving and environmental protection, it has a great market prospect.

Description

A drying system for ion wind composite membrane total heat heat exchanger

technical field

The utility model relates to the field of material drying, in particular to a drying system of an ion wind composite membrane total heat heat exchanger.

Background technique

Most of the existing drying technologies are traditional hot air drying, which is a drying method in which hot air is blown into an oven or drying chamber to speed up the air flow. For heat-sensitive materials such as food, which are unstable when exposed to heat, it is easy to cause adverse effects on the internal structure, color, taste, and nutritional value of dried food materials when exposed to heat, and hot air drying consumes more energy and has low thermal efficiency, while freezing Although drying ensures the texture characteristics of food, the equipment cost of this technology is high, the operating cost is high, and the drying time is long, which is not conducive to large-scale popularization and use, and freeze-drying will change the flavor of food. As an emerging drying technology, electrohydrodynamic drying (EHD) has the advantages of good maintenance of the color, nutritional content and state of materials, low investment, low energy consumption, and no temperature rise. It is easier to enter into industrial and agricultural production, which can play a major role and open up a new way. The principle of electrohydrodynamic drying technology is to drive the air to form a stable airflow under a high-voltage field, that is, the "ion wind" accelerates the evaporation of water, and then the water is taken out of the oven or drying room through the blower. However, the current electrohydrodynamic The air dehumidification of the dynamic drying device mostly removes moisture through desiccant, dehumidifying fan, etc., which requires regular replacement of the desiccant and increases the power consumption of the fan, which increases the cost of the drying process.

For example, the Chinese utility model patent with the notification number CN203881052U discloses "a high-voltage electric field dryer" to remove the moisture in the airtight device by installing a dehumidifying fan. This kind of moisture generated by installing a dehumidifying fan has disadvantages, which increases the The power consumption of the high-voltage electric field dryer results in high operating costs.

Utility model content

To sum up, in order to overcome the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a drying system for an ion wind composite membrane total heat heat exchanger.

The technical solution of the utility model to solve the above technical problems is as follows: a drying system of an ion wind composite membrane total heat heat exchanger, including a box body, an ion wind generating device and a circulating air path; the ion wind generating device is located in the box The ion wind is formed in the body to speed up the moisture evaporation rate of the dried material in the box; the circulating air path is located outside the box and communicated with the box to circulate the low-temperature and high-humidity air in the box The circulating air path is also equipped with a dehumidification and heating device for exchanging heat and water molecules between the low-temperature and high-humidity air inside the box and the high-temperature and low-humidity air outside the box.

On the basis of the above technical solution, the utility model can also be improved as follows:

Further, the ion wind generating device includes an upper electrode plate and a lower electrode plate; the upper electrode plate is connected to the inner wall of the top of the box, and the lower electrode plate is located at the bottom of the box and connected to the upper electrode. The upper and lower plates are relatively arranged; electrode needles are arranged on the upper electrode plate, and the dried material is placed on the lower electrode plate; the upper electrode plate is connected to a high-voltage power supply outside the box and grounded through a wire, so The lower electrode plate is also grounded.

Further, the upper electrode plate is connected to the inner wall of the top of the box through an insulating shaft.

Further, the circulating air path includes a first air duct, a second air duct and a circulating fan; an air inlet and an air outlet are respectively provided on the opposite side walls of the box, and one end of the first air duct connected to the air inlet of the box, the other end of which is connected to the air outlet of the dehumidification and heating device, the circulation fan is arranged on the first air duct; one end of the second air duct is connected to the box The air outlet, the other end of which is connected to the air inlet of the dehumidification and heating device.

Further, both the air inlet of the box and the air outlet of the box are equipped with mesh covers.

Further, an equalizer plate is installed at the air inlet of the box body.

Further, the position of the air inlet of the box is higher than that of the lower electrode plate.

Further, the dehumidification and heating device includes a casing, a membrane total heat exchanger and a blower; the membrane total heat exchanger is inside the casing; two adjacent side walls of the casing are provided with The A inlet and the C inlet corresponding to the two inlets of the film-type total heat exchanger, and the other two adjacent side walls are provided with B outlets corresponding to the two outlets of the membrane-type total heat exchanger. Air port and D air outlet; the blower is connected to the A inlet to send the high-temperature and low-humidity air into the membrane type total heat exchanger, the first air pipe is connected to the D air outlet, and the second Two air pipes are connected to the C air inlet to send the low-temperature and high-humidity air into the membrane total heat exchanger and cross flow with the high-temperature and low-humidity air, so that the low-temperature and high-humidity air and the After exchanging heat and water molecules, the high-temperature and low-humidity air flows back into the box from the D air outlet through the first air duct.

Further, the B air outlet is provided with an air outlet pipe for discharging the high-temperature and low-humidity air after exchanging heat and water molecules.

Further, it also includes a controller for adjusting the output voltage of the high-voltage power supply, and the controller is electrically connected to the high-voltage power supply.

The above-mentioned membrane-type total heat exchanger can adopt the "flow channel structure of a membrane total heat exchanger" disclosed by the patent No. CN201141738Y through the vertical splicing of ribs and membranes, or a cross-counter-flow plate heat exchanger disclosed by the patent No. CN201520105254.X The switch; the above-mentioned controller can adopt "a high-voltage power supply control system for X-ray tube" disclosed in the patent No. CN201611066491.5.

The beneficial effect of the utility model is: combining the electrohydrodynamic drying machine and the membrane type total heat exchanger, designing a new type of electrohydrodynamic drying and membrane type heat exchanger device, which not only improves the drying quality of materials , thermal efficiency, and reduce the operating costs in the later period, energy saving and environmental protection, it has a great market prospect.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic illustration of some basic principles of electrodynamic fluid (EHD) in a high voltage electric field.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Box, 2. Materials to be dried, 3. Upper electrode plate, 4. Lower electrode plate, 5. Electrode needle, 6. High voltage power supply, 7. Insulation shaft, 8. First air duct, 9. Second air duct Tube, 10. Circulating fan, 11. Net cover, 12. Evening plate, 13. Shell, 14. Membrane total heat exchanger, 15. Blower fan, 16. Air outlet pipe, 17. Controller, 18. Air molecules , 19, charged particles, 20, ion wind direction.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Fig. 1, a drying system of an ionic wind composite membrane total heat heat exchanger includes a box body 1, an ionic wind generating device and a circulating air path. The ion wind generating device is located in the box 1 and forms an ion wind to accelerate the water evaporation rate of the material 2 to be dried in the box 1 . The circulating air path is located outside the box body 1 and communicates with the box body 1 to circulate the low-temperature and high-humidity air in the box body 1. A dehumidification and heating device for exchanging heat and water molecules between the low-temperature and high-humidity air inside the body 1 and the high-temperature and low-humidity air outside the box 1 .

The ion wind generating device includes an upper electrode plate 3 and a lower electrode plate 4 . The upper electrode plate 3 is connected to the inner wall of the top of the box 1 through an insulating shaft 7 . The bottom of the lower electrode plate 4 inside the box body 1 is opposite to the upper electrode plate 3 up and down. An electrode needle 5 is arranged on the upper electrode plate 3 , and a material 2 to be dried is placed on the lower electrode plate 4 . The upper electrode plate 3 is connected to a high-voltage power source 6 outside the box 1 and grounded through wires, and the lower electrode plate 4 is also grounded. The drying system also includes a controller for adjusting the output voltage of the high voltage power supply 6 , and the controller is electrically connected to the high voltage power supply 6 . The upper electrode plate 3 is a multi-needle discharge electrode, and the lower electrode plate 4 is a ground plate electrode. Both the upper electrode plate 3 and the lower electrode plate 4 are made of metals with good electrical conductivity such as copper or aluminum. The upper electrode plate 3 is usually composed of needle electrodes (metal needles) or wire electrodes (thin metal wires), and the lower electrode plate 4 It is usually composed of metal plates or metal mesh. When drying, the material to be dried is placed on the lower electrode plate 4, and then a certain range of high voltage (usually 20-50kV) is applied to the upper electrode plate 3 through the high voltage power supply 6, so that the upper electrode plate 3 is charged. As shown in Figure 2, after electrification, a high voltage and strong electric field can be formed between the upper electrode plate 3 and the lower electrode plate 4, and the material is dried by using the principle of Asakawa effect. After the high voltage is applied to the upper electrode plate 3, corona discharge will occur, and the charged particles such as electrons or ions scattered in the air will accelerate and move under the action of a strong electric field to obtain sufficient kinetic energy. When they interact with air molecules 18 Upon collision, air molecules can be dissociated into ions and electrons. These newly formed ions and electrons collide with other air molecules and generate new charged particles 19 , which in turn generate a large number of charged particles 19 . Among these charged particles 19, the charged particles with different sign on the charge on the tip will be attracted by the charge on the tip and fly to the tip, so that the charge on the tip will be neutralized; while the charged particles with the same sign on the tip will be repelled. away from the tip, and at the same time drive other molecules to move together to form an ion wind with a certain speed and direction (indicated by arrow 20). When the material to be dried is impacted by these ionic winds, the moisture on its surface evaporates faster, resulting in an increase in its drying rate.

The circulating air path includes a first air duct 8 , a second air duct 9 and a circulating fan 10 . An air inlet and an air outlet are respectively arranged on the opposite side walls of the box body 1, and the air inlet of the box body 1 and the air outlet of the box body 1 are all equipped with a net cover 11, and the net cover 11 It is used to block materials and prevent materials from entering the air inlet of the box 1 or the air outlet of the box 1 . A flow sharing plate 12 is also installed at the air inlet of the box body 1, and the flow sharing plate 12 can evenly distribute the air flow, and the position of the air inlet of the box body 1 is higher than that of the lower electrode. Plate 4 can strengthen the nonlinear interaction between the ion wind and the convective wind, and improve the drying effect. One end of the first air pipe 8 is connected to the air inlet of the box body 1 , and the other end is connected to the air outlet of the dehumidification and heating device. The circulation fan 10 is arranged on the first air pipe 8 . The circulating fan 10 is equipped with a flow stabilizer, which sends air to the box body 1 through the first air pipe 8, so as to speed up the evaporation of moisture in the food and promote the drying of the food. One end of the second air pipe 9 is connected to the air outlet of the box 1, and the other end is connected to the air inlet of the dehumidification and heating device.

The dehumidification and temperature raising device includes a casing 13 , a film total heat exchanger 14 and a blower 15 . The membrane total heat exchanger 14 is inside the shell 13 . The two adjacent side walls of the shell 13 are provided with an A inlet and a C inlet corresponding to the two inlets of the film total heat exchanger 14, and on the other two adjacent side walls A B outlet and a D outlet corresponding to the two outlets of the film total heat exchanger 14 are provided. The blower 15 is connected to the A inlet to send the high-temperature and low-humidity air into the membrane total heat exchanger 14, the first air pipe 8 is connected to the D air outlet, and the second air pipe 9 Connect the C air inlet to send the low-temperature and high-humidity air into the membrane total heat exchanger 14 and cross-flow with the high-temperature and low-humidity air, so that the low-temperature and high-humidity air and the high-temperature After exchanging heat and water molecules, the low-humidity air flows back into the box body 1 from the air outlet D through the first air duct 8 . The B air outlet is provided with an air outlet pipe 16 for discharging the high-temperature and low-humidity air after exchanging heat and water molecules. The low-temperature, high-humidity air inside the box 1 and the high-temperature, low-humidity air outside the box 1 cross and flow through the membrane total heat exchanger 14 under the action of the circulating fan 10 and the blower 15 respectively, wherein the low-temperature, high-humidity air and the high-temperature, low-humidity air Humidity air crosses through the film type total heat exchanger 14, especially in summer climate, the air outside the box body 1 is higher in temperature and lower in humidity relative to the air in the box body 1 . Since there is a temperature difference and a water vapor partial pressure difference on both sides of the membrane of the membrane total heat exchanger 14, the heat and mass of the low-temperature high-humidity air and the high-temperature and low-humidity air are carried out on both sides of the membrane total heat exchanger 14. The exchange of heat and water molecules further reduces the humidity of the air in the box 1 and increases the temperature, and the humidity in the high-humidity air in the box 1 is transferred to the low-humidity air outside the box 1, achieving For the purpose of dehumidification. Compared with the existing drying technology, this drying system takes into account the characteristics of high-voltage electric field drying speed, good drying quality, low later operation cost, energy saving and environmental protection. Membrane total heat exchanger 14 and the like form an overall circulation system through the air duct, so that the drying speed is accelerated, the flavor of the food is improved, and the drying effect is better. The power consumption part is mainly the high-voltage power supply 6, the circulation fan 10 and the blower fan 15, which reduces the operating cost in the later stage, and is energy-saving and environment-friendly.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. a drying system of ion wind composite membrane total heat heat exchanger, is characterized in that, comprises casing (1), ion wind generating device and circulating air path; Described ion wind generating device is in described casing (1) ) and form ion wind to speed up the moisture evaporation rate of the dried material (2) in the box (1); ) to communicate with the low-temperature and high-humidity air in the box (1) to circulate, and the circulating air path is also provided to make the low-temperature and high-humidity air in the box (1) and the box (1) ) A dehumidification and heating device for exchanging heat and water molecules with high-temperature and low-humidity air outside. 2. the drying system of ion wind composite membrane total heat heat exchanger according to claim 1, is characterized in that, described ion wind generator comprises upper electrode plate (3) and lower electrode plate (4); The electrode plate (3) is connected to the inner wall of the top of the box (1), and the bottom of the lower electrode plate (4) in the box (1) is arranged opposite to the upper electrode plate (3). ; An electrode needle (5) is provided on the upper electrode plate (3), and the dried material (2) is placed on the lower electrode plate (4); the upper electrode plate (3) is connected to the A high-voltage power supply (6) outside the box (1) and grounded, and the lower electrode plate (4) is also grounded. 3. The drying system of ion wind composite membrane total heat heat exchanger according to claim 2, characterized in that, the upper electrode plate (3) is connected to the top of the box (1) through an insulating shaft (7) on the inner wall. 4. The drying system of ion wind composite membrane total heat heat exchanger according to claim 2, characterized in that, the circulating air path comprises a first air pipe (8), a second air pipe (9) and a circulating fan (10); On the opposite side walls of the box (1), an air inlet and an air outlet are respectively provided, and one end of the first air duct (8) is connected to the air inlet of the box (1) mouth, the other end of which is connected to the air outlet of the dehumidification and heating device, and the circulation fan (10) is arranged on the first air duct (8); one end of the second air duct (9) is connected to the box The air outlet of the body (1), the other end of which is connected to the air inlet of the dehumidification and heating device. 5. the drying system of ion wind composite membrane total heat heat exchanger according to claim 4, is characterized in that, the air inlet of described casing (1) and the air outlet of described casing (1) all install A net cover (11) is arranged. 6 . The drying system of ion wind composite membrane total heat heat exchanger according to claim 4 , characterized in that a flow equalizer ( 12 ) is installed at the air inlet of the box ( 1 ). 7. The drying system of the ion wind composite membrane total heat heat exchanger according to claim 4, characterized in that, the position of the air inlet of the box body (1) is higher than the lower electrode plate (4). 8. The drying system of the ion wind composite membrane total heat heat exchanger according to claim 4, characterized in that, the dehumidification heating device comprises a shell (13), a membrane total heat exchanger (14) and a blower (15 ); the membrane total heat exchanger (14) is inside the shell (13); the adjacent two side walls of the shell (13) are provided with the membrane total heat exchanger (14) The A inlet and the C inlet corresponding to the two inlets are provided with the B outlet and the B outlet corresponding to the two outlets of the film total heat exchanger (14) on its other two adjacent side walls. D air outlet; the blower (15) is connected to the A inlet to send the high-temperature and low-humidity air into the membrane-type total heat exchanger (14), and the first air pipe (8) is connected to the D air outlet, the second air pipe (9) is connected to the C air inlet to send the low-temperature and high-humidity air into the membrane-type total heat exchanger (14) and cross-flow with the high-temperature and low-humidity air After that, the low-temperature, high-humidity air exchanges heat and water molecules with the high-temperature, low-humidity air, and then flows back into the box (1) from the D air outlet through the first air duct (8). . 9. The drying system of the ion wind composite membrane total heat heat exchanger according to claim 8, characterized in that, the B air outlet is provided with a device for discharging the high-temperature and low-humidity air after exchanging heat and water molecules. Outlet pipe (16). 10. The drying system of the ion wind composite membrane total heat heat exchanger according to any one of claims 2 to 8, characterized in that, it also includes a controller for adjusting the output voltage of the high-voltage power supply (6), so The controller is electrically connected to the high voltage power supply (6).