VORTEX ELECTRIC FIELD PURIFICATION DEVICE AND DESIGN METHOD THEREFOR

Abstract

The present invention relates to a vortex electric field purification device and a design method therefor, belonging to the technical field of air purification. The vortex electric field purification device includes a frame, where a dust collection area and an ionization area are arranged inside the frame in parallel, both the dust collection area and the ionization area include a plurality of polar plates parallel to each other and arranged at intervals, the first direction is parallel to a direction from an air inlet side of the purification device to a leeward side of the purification device, and the second direction is perpendicular to the first direction. The vortex electric field purification device can avoid the phenomenon of ignition or arcing of the ionization area and the dust collection area, has high reliability, and is economical and durable.

Claims

1. A vortex electric field purification device, characterized in that, comprising a frame, wherein a dust collection area and an ionization area are arranged inside the frame in parallel, the dust collection area and the ionization area each comprise a plurality of polar plates parallel to each other and arranged at intervals, a minimum distance between high-voltage polar plates of the dust collection area and low-voltage polar plates of the ionization area in a first direction is not less than a distance between low-voltage polar plates and the high-voltage polar plates of the dust collection area in a second direction, the first direction is parallel to a direction from an air inlet side of the purification device to a leeward side of the purification device, the second direction and the first direction are located in a same horizontal plane, and the second direction is perpendicular to the first direction.

2. The vortex electric field purification device according to claim 1, characterized in that, a minimum distance d.sub.2 between the low-voltage polar plates of the ionization area and the low-voltage polar plates of the dust collection area in the first direction is not less than a distance d.sub.1 between the high-voltage polar plates and the low-voltage polar plates of the dust collection area in the second direction.

3. The vortex electric field purification device according to claim 2, characterized in that, if a distance between high-voltage polar plates and the low-voltage polar plates of the ionization area is d.sub.4, d.sub.44 d.sub.2.

4. The vortex electric field purification device according to claim 3, characterized in that, the high-voltage polar plates and the low-voltage polar plates of the ionization area are respectively connected to a high-voltage power supply, an ionization electric field is formed between the high-voltage polar plates and the low-voltage polar plates of the ionization area, the high-voltage polar plates of the dust collection area are activated by the ionization electric field to generate a vortex electric field, and a corresponding relationship between an absolute value of an induced voltage of the vortex electric field and d.sub.1 is: the absolute value of the induced voltage/d.sub.1=0.7-1.3 kV/mm.

5. The vortex electric field purification device according to claim 1, characterized in that, the high-voltage polar plates of the ionization area are connected to a high-voltage end of the high-voltage power supply through a conductive rod, an avoiding hole for the conductive rod to penetrate through is formed in each of the low-voltage polar plates of the ionization area, the avoiding hole is set as a waist-shaped hole, and if a minimum diameter of the waist-shaped hole is D and an absolute value of a voltage of the ionization electric field is U, D/U2 mm/kV.

6. The vortex electric field purification device according to claim 1, characterized in that, wind deflectors are arranged at the tops and bottoms of the low-voltage polar plates of the ionization area, the wind deflectors are arranged obliquely, and a distance between an end portion of each of the wind deflectors close to the air inlet side of the purification device and the frame is less than a distance between an end portion of each of the wind deflectors close to the leeward side of the purification device and the frame.

7. The vortex electric field purification device according to claim 6, characterized in that, a distance between ionization sawteeth on the high-voltage polar plates of the ionization area and the low-voltage polar plates in the second direction is not greater than a minimum distance of the ionization sawteeth and the wind deflectors in a third direction, the third direction and the first direction are located in a same vertical plane, and the third direction is perpendicular to the first direction.

8. The vortex electric field purification device according to claim 1, characterized in that, the bottoms of the low-voltage polar plates of the ionization area are connected to the frame through a connecting plate, and a height of the connecting plate is not greater than a height of a lower edge strip of the frame.

9. The vortex electric field purification device according to claim 1, characterized in that, in the ionization area, a mounting hole for the first conductive rod to penetrate through is formed in each of the high-voltage polar plates, a first ionization sawtooth is arranged on a side surface of each of the high-voltage polar plates close to the air inlet side of the purification device, a second ionization sawtooth is arranged on a side surface of each of the high-voltage polar plates close to the leeward side of the purification device, a distance between the first ionization sawtooth and the mounting hole in the first direction serves as a second distance, a distance between the second ionization sawtooth and the mounting hole in the first direction serves as a third distance, and the second distance is less than the third distance.

10. The vortex electric field purification device according to claim 9, characterized in that, the first ionization sawtooth and the second ionization sawtooth have the same structure, the first ionization sawtooth and the second ionization sawtooth are staggered in a height direction of the purification device, and a difference value between the second distance and the third distance is 3/10 to of a distance between adjacent second ionization sawtecth.

11. The vortex electric field purification device according to claim 1, characterized in that, the high-voltage polar plates of the ionization area and two low-voltage polar plates adjacent thereto form an ionization interval C.sub.1, the high-voltage polar plates of the dust collection area and two low-voltage polar plates adjacent thereto form a dust collection interval C.sub.2, and in the second direction, C.sub.13 C.sub.2.

12. The vortex electric field purification device according to claim 3, characterized in that, in the second direction, a distance between a sawtooth tip of the high-voltage polar plates of the ionization area close to the air inlet side and the low-voltage polar plates adjacent thereto is d.sub.5, and in the first direction, a width of each of the high-voltage polar plates and the low-voltage polar plates of the ionization area is three times d.sub.5.

13. A method for designing the vortex electric field purification device according to claim 1, comprising the following steps: obtaining an induced voltage of the dust collection area as well as a minimum distance between the high-voltage polar plates of the dust collection area and the low-voltage polar plates of the ionization area in the first direction according to a distance between the positions of the high-voltage polar plates and the low-voltage polar plates of the dust collection area in the second direction, and determining the positions of the low-polar plates of the ionization area in the first direction; obtaining a distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the first direction as well as a minimum distance between the high-voltage polar plates of the ionization area and the high-voltage polar plates of the dust collection area in the first direction according to the distance between the positions of the high-voltage polar plates and the low-voltage polar plates of the dust collection area in the second direction, and determining the positions of the high-voltage polar plates of the ionization area in combination with the positions of the low-voltage polar plates of the ionization area; and obtaining a voltage of the ionization electric field of the ionization area according to the distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the second direction.

14. The method for designing the vortex electric field purification device according to claim 13, characterized in that, if the distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the second direction is d.sub.4, 0.5 kV/mmthe absolute value of the voltage of the ionization electric field of the ionization area/d.sub.41 kV/mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is an axial side view of a vortex electric field purification device according to an embodiment of the present invention;

[0027] FIG. 2 is a side view of a vortex electric field purification device according to an embodiment of the present invention; and

[0028] FIG. 3 is a flow block diagram of a method for designing a vortex electric field purification device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make those skilled in the art better understand the technical solutions of the present invention, the technical solutions of the present invention are clearly and completely described below with reference to the accompanying drawings of the present invention. Other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application. In addition, the directional terms mentioned in the following embodiments, such as up, down, left and right are merely referring to the directions in the accompanying drawings. Therefore, the used directional terms are intended to illustrate rather than limit the present invention.

[0030] According to an embodiment of the present invention, a vortex electric field purification device is provided. Referring to FIG. 1, the vortex electric field purification device includes a frame 1, where a dust collection area 3 and an ionization area 2 are arranged inside the frame 1 in parallel, both the dust collection area 3 and the ionization area 2 include a plurality of polar plates parallel to each other and arranged at intervals, a minimum distance between high-voltage polar plates of the dust collection area 3 and low-voltage polar plates of the ionization area 2 in a first direction is not less than a distance between low-voltage polar plates and the high-voltage polar plates of the dust collection area 3 in a second direction, the first direction is parallel to a direction from an air inlet side of the purification device to a leeward side of the purification device, the second direction and the first direction are located in a same horizontal plane, and the second direction is perpendicular to the first direction.

[0031] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, a minimum distance d.sub.2 between the low-voltage polar plates of the ionization area 2 and the low-voltage polar plates of the dust collection area 3 in the first direction is not less than a distance d.sub.1 between the high-voltage polar plates and the low-voltage polar plates of the dust collection area 3 in the second direction. If a distance between high-voltage polar plates and the low-voltage polar plates of the ionization area 2 is d.sub.4, d.sub.44 d.sub.2. After fully considering the factors of electrical safety and purification efficiency, the inventor found through tests that when d.sub.44 d.sub.2, the vortex electric field purification device can better meet the electrical safety and purification efficiency; and when d.sub.44 d.sub.2, the vortex electric field purification device is prone to arcing ignition or flashover, has low purification efficiency and does not meet the actual operation requirement.

[0032] Preferably, the minimum distance between the low-voltage polar plates of the ionization area 2 and the high-voltage polar plates of the dust collection area 3 in the first direction is d.sub.3, 1.5 d.sub.1d.sub.32.5 d.sub.1, and similarly, 1.5 d.sub.1d.sub.22.5 d.sub.1.

[0033] To better ensure the purification efficiency, electrical safety and induced voltage and consider the stability of products in the early and late operation periods, a comparative test was tested, and it was found that the overall performance is the best when the minimum distance between the low-voltage polar plates of the ionization area 2 and the high-voltage polar plates of the dust collection area 3 in the first direction is d.sub.3 and 1.5 d.sub.1d.sub.32.5 d.sub.1, and similarly, the overall purification efficiency and the electrical performance are more excellent than this range when 1.5 d.sub.1d.sub.22.5 d.sub.1.

[0034] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, the high-voltage polar plates and the low-voltage polar plates of the ionization area 2 are respectively connected to a high-voltage power supply, an ionization electric field is formed between the high-voltage polar plates and the low-voltage polar plates of the ionization area 2, the high-voltage polar plates of the dust collection area 3 are activated by the ionization electric field to generate a vortex electric field, and a corresponding relationship between an absolute value of an induced voltage of the vortex electric field and d.sub.1 is:

[0035] the absolute value of the induced voltage/d.sub.1=0.7-1.3 kV/mm.

[0036] It should be noted that the inventor made a systematic test experiment on a corresponding relationship between the absolute value of the induced voltage and d.sub.1 on the premise of comprehensively considering the primary purification efficiency and electrical safety of the particulate matters and based on the vortex electric field purification device with the same overall size and the same environment operation parameter. The experimental result is shown in Table 1.

TABLE-US-00001 TABLE 1 Absolute Value of Induced Voltage/d.sub.1 = 0.7-1.3 kV/mm Distance Absolute value between high- of voltages voltage polar applied to high- Primary plates and low- voltage polar plates Absolute Electrical purification voltage polar and low-voltage value of Surface Safety of efficiency of plates of dust polar plates of dust induced air Dust particulate Serial collection area collection area value/d.sub.1 Temperature velocity Collection matters number (mm) (kV) (kV/mm) ( C.) (m/s) Area (%) 1 6 3 0.5 25 4 No arcing, 78.3 no flashover 2 6 3.6 0.6 25 4 No arcing, 82.6 no flashover 3 6 4.2 0.7 25 4 No arcing, 91.5 no flashover 4 6 6 1.0 25 4 No arcing, 96.5 no flashover 5 6 7.8 1.3 25 4 No arcing, 98.9 no flashover 6 6 8.4 1.4 25 4 Arcing <30

[0037] It can be seen from Table 1 that when the absolute value of the induced voltage/d.sub.1 is less than 0.7, the phenomena of arcing and flashover does not occur in the dust collection area, but the primary purification efficiency of the particulate matters is less than 90%; and when the absolute value of the induced voltage/d.sub.1 is 1.4, the phenomenon of arcing occurs in the dust collection area, and the primary purification efficiency of the particulate matters is less than 30%.

[0038] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, the high-voltage polar plates of the ionization area 2 are connected to a high-voltage end of the high-voltage power supply through a conductive rod, an avoiding hole for the conductive rod to penetrate through is formed in each of the low-voltage polar plates of the ionization area 2, the avoiding hole is set as a waist-shaped hole, and if a minimum diameter of the waist-shaped hole is D and an absolute value of a voltage of the ionization electric field is U, D/U2 mm/kV.

[0039] It should be noted that the inventor made a systematic test experiment on a corresponding relationship of D/U on the premise of comprehensively considering the primary purification efficiency and electrical safety of the particulate matters and based on the vortex electric field purification device with the same overall size and the same environment operation parameter. It is concluded that when D/U2 mm/kV, the electrical safety and the purification efficiency of the particulate matters can meet the actual operation requirement; and when D/U<2 mm/kV, the ionization area is also safe and the phenomena of arcing and flashover will not occur, but the primary purification efficiency of the particulate matters is significantly less than 90%, and the actual purification requirement is not met.

[0040] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, wind deflectors 4 are arranged at the tops and bottoms of the low-voltage polar plates of the ionization area 2, the wind deflectors 4 are arranged obliquely, and a distance between an end portion of each of the wind deflectors 4 close to the air inlet side of the purification device and the frame 1 is less than a distance between an end portion of each of the wind deflectors close to the leeward side of the purification device and the frame 1.

[0041] Specifically, a distance between ionization sawteeth on the high-voltage polar plates of the ionization area 2 and the low-voltage polar plates in the second direction is not greater than a minimum distance of the ionization sawteeth and the wind deflectors 4 in a third direction, the third direction and the first direction are located in a same vertical plane, and the third direction is perpendicular to the first direction.

[0042] It should be noted that the structures of the wind deflectors 4 are subjected to optimal design on the basis of verifying an electrical gap, thereby not only ensuring that the ionization voltage will not break down, but also ensuring that the air entering the ionization area will be gathered and converged to flow to the dust collection area.

[0043] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, the bottoms of the low-voltage polar plates of the ionization area 2 are connected to the frame 1 through a connecting plate, and a height of the connecting plate is not greater than a height of a lower edge strip of the frame 1.

[0044] It should be noted that the connecting plate is conducive to fixing the low-voltage polar plats of the ionization area, and the height of the connecting plate is not greater than the height of the lower edge strip of the frame, so that the effects of no windproofness, low resistance and high space utilization rate are achieved.

[0045] In the vortex electric field purification device according to this embodiment, referring to FIG. 1 and FIG. 2, in the ionization area 2, a mounting hole 5 for the first conductive rod to penetrate through is formed in each of the high-voltage polar plates, a first ionization sawtooth 6 is arranged on a side surface of each of the high-voltage polar plates close to the air inlet side of the purification device, a second ionization sawtooth 7 is arranged on a side surface of each of the high-voltage polar plates close to the leeward side of the purification device, a distance between the first ionization sawtooth 6 and the mounting hole 5 in the first direction serves as a second distance, a distance between the second ionization sawtooth 7 and the mounting hole 5 in the first direction serves as a third distance, and the second distance is less than the third distance.

[0046] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, the first ionization sawtooth 6 and the second ionization sawtooth 7 have the same structure, the first ionization sawtooth and the second ionization sawtooth are staggered in a height direction of the purification device, and a difference value between the second distance and the third distance is 3/10 to of a distance between adjacent second ionization sawteeth 7; and the closer the high-voltage polar plates of the ionization area 2 are to the dust collection area 3, the higher the induced voltage is and the higher the primary purification efficiency of the particulate matters is, but when the distance is short to a certain extent, the electrical safety is not easy to control.

[0047] Based on the same dust collection area, the inventor designed different ionization areas to perform efficiency test experiments, and found that when the difference value between the second distance and the third distance is 3/10 to of the distance between the adjacent second ionization sawteeth, the primary purification efficiency of the particulate matters can be greater than 90%, the requirement of the actual operation is met, and the experimental results are shown in Table 3.

TABLE-US-00002 TABLE 3 Primary Purification Ionization Area Surface Efficiency of Difference Air Particulate Serial ratio Voltage Velocity Matters Electrical Number / KV m/s % Safety 1 0.25 17 4.5 98.5 Easy to cause ignition 2 0.3 17 4.5 96.6 Safe 3 0.4 17 4.5 94.9 Safe 4 0.5 17 4.5 92.5 Safe 5 0.55 17 4.5 86.7 Safe

[0048] It can be seen from Table 3 that the high-voltage polar plates of the ionization area are close to the dust collection area, so that the induced voltage can be increased, the purification efficiency can be improved, and the maintenance cycle can be prolonged.

[0049] In the vortex electric field purification device according to this embodiment, referring to FIG. 1, the high-voltage polar plates of the ionization area 2 and two low-voltage polar plates adjacent thereto form an ionization interval C.sub.1, the high-voltage polar plates of the dust collection area 3 and two low-voltage polar plates adjacent thereto form a dust collection interval C.sub.2, and in the second direction, C.sub.13 C.sub.2. The ionization area requires a higher voltage to ionize the air to charge the passing particulate matters, and the dust collection area requires a reasonably designed voltage to capture the charged particulate matters. It is found through the test that better purification effect and electrical safety can be achieved when C.sub.13 C.sub.2, and poor purification efficiency and electrical safety can be achieved when C.sub.13 C.sub.2, which is not conducive to stabilizing the performance of long-time operation and maintaining the electrical safety.

[0050] According to an embodiment of the present invention, a method for designing a vortex electric field purification device is provided. Referring to FIG. 3, the method includes the following steps: [0051] an induced voltage of the dust collection area as well as a minimum distance between the high-voltage polar plates of the dust collection area and the low-voltage polar plates of the ionization area in the first direction are obtained according to a distance between the positions of the high-voltage polar plates and the low-voltage polar plates of the dust collection area in the second direction, and the positions of the low-polar plates of the ionization area in the first direction is determined; [0052] a distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the first direction as well as a minimum distance between the high-voltage polar plates of the ionization area and the high-voltage polar plates of the dust collection area in the first direction are obtained according to the distance between the positions of the high-voltage polar plates and the low-voltage polar plates of the dust collection area in the second direction, and the positions of the high-voltage polar plates of the ionization area is determined in combination with the positions of the low-voltage polar plates of the ionization area; and [0053] a voltage of the ionization electric field of the ionization area is obtained according to the distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the second direction.

[0054] Preferably, the distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area is 24 mm, the distance between the high-voltage polar plates and the low-voltage polar plates of the dust collection area is 6 mm, the absolute value of the voltage of the ionization electric field is 12 kV, the absolute value of the induced voltage is 6 kV, and the primary purification efficiency of the particulate matters is the best.

[0055] In the method for designing the vortex electric field purification device according to the embodiment, if the distance between the high-voltage polar plates and the low-voltage polar plates of the ionization area in the second direction is d.sub.4, 0.5 kV/mmthe absolute value of the voltage of the ionization electric field of the ionization area/d.sub.41 kV/mm.

[0056] It should be noted that based on the same dust collection area, the inventor designed different ionization areas to perform a test experiment on the primary purification efficiency of the particulate matters, and found that when 0.5 kV/mmthe absolute value of the voltage of the ionization electric field of the ionization area/d.sub.41 kV/mm, the primary purification efficiency of the particulate matters can be greater than 90%, and the actual operation requirement is met. The experimental result is shown in Table 4.

TABLE-US-00003 TABLE 4 0.5 kV/mm Voltage of Ionization Electric Field of Ionization Area/d.sub.4 1 kV/mm Distance Absolute value of Absolute value between voltages applied of voltage high-voltage to high-voltage of ionization Primary polar plates polar plates electric Electrical purification and low-voltage and low-voltage field of Surface safety efficiency of polar plates of polar plates of ionization air condition of particulate Serial ionization area ionization area area/d.sub.4 Temperature velocity ionization matters number (mm) (kV) (kV/mm) ( C.) (m/s) area (%) 1 24 9.6 0.40 25 4 No 83.1 arcing, no flashover 2 24 12 0.50 25 4 No 91.6 arcing, no flashover 3 24 14.4 0.60 25 4 No 92.4 arcing, no flashover 4 24 16.8 0.70 25 4 No 93.3 arcing, no flashover 5 24 19.1 0.80 25 4 No 95.7 arcing, no flashover 6 24 21.6 0.90 25 4 No 96.5 arcing, no flashover 7 24 24 1.00 25 4 No 97.8 arcing, no flashover 8 24 26.4 1.10 25 4 Arcing <30

[0057] The present invention has been described in detail above, and the above are only preferred embodiments of the present invention and are not intended to limit the implementation scope of the present invention, that is, all equivalent variations and modifications made within the claims of the present invention shall be included within the scope of the present invention.