Low-temperature plasma waste gas purification device

Abstract

The utility model discloses a low-temperature plasma waste gas purification device and belongs to the technical field of waste gas purification. Comprising a waste gas purification bin and a plurality of plasma purification units arranged in the waste gas purification bin side by side, and a gas inlet and a gas outlet are formed in the two ends of the waste gas purification bin correspondingly; each plasma purification unit comprises a fixing support, a plasma discharge rod and a discharge sleeve, the discharge sleeves are fixed to the fixing support, the plasma discharge rods are coaxially arranged in the discharge sleeves, a plurality of annular discharge pieces are arranged on the plasma discharge rods, the discharge pieces are arranged in parallel at intervals, and the discharge sleeves are fixed to the fixing support. The outer side of the circumference of each discharge piece is provided with a plurality of discharge tips, the inner side of each discharge piece is provided with a connecting piece arranged in the axial direction, and the connecting pieces are fixedly connected with the plasma discharge rod. The connecting sheets are arranged on the inner sides of the discharging sheets, the discharging sheets are connected with the discharging rod through the connecting sheets, connection is convenient, the distance between the discharging sheets is easier to control, the discharging tips are not prone to being touched in the assembling process, and the assembling cost is lower.

Description

Technical Field

[0001] The invention discloses a low-temperature plasma waste gas purification device, belonging to the technical field of waste gas purification. Background Art

[0002] Low-temperature plasma can effectively separate pollutants from exhaust gas and is currently an effective means of purifying it. Chinese utility model patent CN204952615U discloses a low-temperature plasma exhaust gas purification device comprising a purification chamber and a power module controller mounted on the purification chamber. The purification chamber is equipped with a plasma purification chamber, employing an array of multiple plasma cavities that operate simultaneously, improving the efficiency of the purification device. The emitter rods are densely packed needle-shaped electrodes, utilizing a low-temperature plasma purification technology with dense tip discharge, emitting high-voltage, high-frequency, low-current, sawtooth-shaped low-temperature plasma.

[0003] However, dense needle-shaped electrode rods are complex to manufacture and are costly. Chinese utility model patent CN222108195U discloses a low-temperature plasma launch rod that uses a spiral launch plate. Compared with needle-shaped electrodes, spiral launch plates are simpler to manufacture. However, in order to ensure better exhaust gas treatment effects, the pitch of the launch plate needs to be accurately controlled, which brings difficulties to the subsequent assembly process, low assembly efficiency, and high assembly cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and to provide a low-temperature plasma waste gas purification device with high assembly efficiency and low assembly cost.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: the low-temperature plasma exhaust gas purification device includes an exhaust gas purification chamber and a plurality of plasma purification units arranged side by side in the exhaust gas purification chamber, the exhaust gas purification chamber is provided with disassembly windows corresponding to the plasma purification units, each disassembly window is provided with a sealed door, and the exhaust gas purification chamber is provided with an air inlet and an exhaust port at both ends thereof;

[0006] The plasma purification unit includes a fixed bracket, a plasma discharge rod and a discharge sleeve. Several discharge sleeves are fixed on the fixed bracket. The plasma discharge rod is coaxially arranged in the discharge sleeve. One end of the plasma discharge rod extends out of the discharge sleeve and is connected to the fixed bracket. The plasma discharge rod is provided with several annular discharge plates. The several discharge plates are arranged in parallel and at intervals. Each discharge plate has several discharge tips on the outer side of the circumference. A connecting plate arranged along the axial direction is provided on the inner side of the discharge plate. The connecting plate is fixedly connected to the plasma discharge rod.

[0007] Preferably, the plurality of connecting plates are evenly arranged around the center of the discharge plate.

[0008] Preferably, the connecting plate and the discharge plate are an integral structure.

[0009] Preferably, the connecting piece is arc-shaped.

[0010] Preferably, there is one connecting piece, which is cylindrical.

[0011] Preferably, the axial height of the connecting piece is 3-10 times the thickness of the discharge piece.

[0012] Preferably, the fixing bracket includes a first fixing plate, a second fixing plate and a fixing rod, the two ends of the discharge sleeve are fixedly connected to the first fixing plate and the second fixing plate respectively, the fixing rod is fixed to the side of the second fixing plate away from the first fixing plate through an insulating component, and one end of the plasma discharge rod is fixedly connected to the fixing rod through a discharge rod fixing component.

[0013] Preferably, the discharge rod fixing assembly includes an adjusting sleeve and a fixing seat, the adjusting sleeve is fixedly sleeved on the fixing rod, the side of the adjusting sleeve is threadedly connected with an adjusting top screw, the fixing seat is fixed on one side of the adjusting sleeve, and one end of the plasma discharge rod is fixed to the fixing seat through a clamp.

[0014] Preferably, the connecting piece is connected to the plasma discharge rod by welding.

[0015] Compared with the prior art, the above technical solution of the low-temperature plasma waste gas purification device has the following beneficial effects:

[0016] A disassembly window is provided on the exhaust gas purification chamber corresponding to each plasma purification unit, which is convenient for installation and later maintenance. After closing the sealing door, a closed purification chamber is formed in the exhaust gas purification chamber.

[0017] A connecting piece is provided on the inner side of the discharge piece, and is connected to the discharge rod through the connecting piece. The connection is convenient and the spacing between the discharge pieces is easier to control. Moreover, during the assembly process, the discharge piece and the plasma discharge rod are connected at a position away from the discharge tip, which is not easy to touch the discharge tip. The operating space is large, the assembly is convenient, the assembly efficiency is high, and the assembly cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the low-temperature plasma waste gas purification device.

[0019] Figure 2 This is the front view of the low-temperature plasma waste gas purification device.

[0020] Figure 3 This is a three-dimensional diagram of the plasma purification unit.

[0021] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0022] Figure 5 This is the main view of the plasma purification unit.

[0023] Figure 6 for Figure 5 Cross-sectional view at the middle BB.

[0024] Figure 7 A three-dimensional diagram of a plasma discharge rod.

[0025] Figure 8 for Figure 7 A partial enlarged view of point C in the middle.

[0026] Figure 9 A three-dimensional diagram of the discharge plate.

[0027] Figure 10 This is a three-dimensional view of a discharge sheet with a cylindrical connecting piece.

[0028] Including: 1, exhaust gas purification chamber 2, sealed door 3, distribution box 4, plasma purification unit 5, first fixing plate 6, second fixing plate 7, discharge sleeve 8, plasma discharge rod 9, fixing frame 10, fixing rod 11, insulating terminal 12, adjustment sleeve 13, fixing seat 14, clamp 15, adjustment top screw 16, discharge plate 17, connecting plate 18, discharge tip 101, air inlet 102, exhaust port 103, disassembly window. DETAILED DESCRIPTION

[0029] Figures 1 to 9 This is the best embodiment of the low temperature plasma waste gas purification device. Figures 1 to 10 The utility model is further described.

[0030] Reference Figure 1-2 The low-temperature plasma exhaust gas purification device includes an exhaust gas purification chamber 1 and multiple plasma purification units 4 arranged side by side within the exhaust gas purification chamber 1. An air inlet 101 and an exhaust port 102 are respectively provided at each end of the exhaust gas purification chamber 1. Access windows 103 corresponding to the plasma purification units 4 are provided in the exhaust gas purification chamber 1. Each access window 103 is provided with a sealed door 2, and a distribution box 3 is provided on the sealed door 2. The distribution box 3 is responsible for supplying power to the corresponding plasma purification unit 4. Access windows 103 are provided in the exhaust gas purification chamber 1 corresponding to each plasma purification unit 4 to facilitate installation and subsequent maintenance. Closing the sealed door 2 forms a closed purification chamber within the exhaust gas purification chamber 1.

[0031] See also Figure 3The plasma purification unit 4 includes a fixed bracket, a plasma discharge rod 8 and a discharge sleeve 7. Several discharge sleeves 7 are fixed on the fixed bracket. The plasma discharge rod 8 is coaxially arranged in the discharge sleeve 7. One end of the plasma discharge rod 8 extends out of the discharge sleeve 7 and is connected to the fixed bracket.

[0032] The fixing bracket includes a first fixing plate 5, a second fixing plate 6 and a fixing rod 10. The two ends of the discharge sleeve 7 are fixedly connected to the first fixing plate 5 and the second fixing plate 6 respectively. The fixing rod 10 is fixed to the side of the second fixing plate 6 away from the first fixing plate 5 through an insulating terminal 11. One end of the plasma discharge rod 8 is fixedly connected to the fixing rod 10 through a discharge rod fixing assembly.

[0033] See also Figure 4-6 The discharge rod fixing assembly includes an adjustment sleeve 12 and a fixing base 13. The adjustment sleeve 12 is fixedly mounted on the fixing rod 10. An adjustment screw 15 is threadedly connected to the side of the adjustment sleeve 12. The fixing base 13 is fixed to one side of the adjustment sleeve 12. One end of the plasma discharge rod 8 is fixed to the fixing base 13 via a clamp 14. The adjustment screw 15 fixes the adjustment sleeve 12 to the appropriate position, thereby setting the plasma discharge rod 8 coaxial with the discharge sleeve 7 and ensuring reliable operation.

[0034] See also Figure 7-8 The plasma discharge rod 8 is provided with a plurality of annular discharge plates 16, which are arranged in parallel and spaced apart. Each discharge plate 16 has a plurality of discharge tips 18 on the outer circumference. A connecting plate 17 is provided on the inner side of the discharge plate 16 along the axial direction. The connecting plate 17 is fixedly connected to the plasma discharge rod 8. The connection plate 17 is provided on the inner side of the discharge plate 16 and is connected to the plasma discharge rod 8 through the connecting plate 17. This facilitates connection and makes it easier to control the spacing between the discharge plates 16. It also reduces the risk of contact between the discharge tips 18 during assembly, thereby reducing assembly costs.

[0035] See also Figure 9 In this embodiment, the discharge structure includes three connecting pieces 17, which are evenly arranged around the center of the discharge piece 16. The number of connecting pieces 17 can be adjusted based on the diameter of the discharge piece 16 and the operating environment. In this embodiment, the connecting pieces 17 are welded to the plasma discharge rod 8, and the connection between the connecting pieces 17 and the plasma discharge rod 8 can be completed by spot welding.

[0036] The connecting piece 17 and the discharge piece 16 are an integral structure. During processing, the discharge tip 18 and the connecting piece 17 are processed as a whole, and then the connecting piece 17 is folded to one side of the discharge piece 16 by bending. This not only makes the connection more reliable, but also reduces the processing cost.

[0037] The connecting piece 17 is preferably arc-shaped, and the connecting piece 17 is subsequently processed to be concentric with the discharge piece 16, so that it can better cooperate with the plasma discharge rod 8 and the connection is more secure. Of course, a flat connecting piece 17 can also meet the connection requirements of the discharge structure and the plasma discharge rod 8.

[0038] The axial height of the connecting piece 17 is 3-10 times the thickness of the discharge piece 16. The discharge piece 16 is usually a thin piece. Since the connecting piece 17 and the discharge piece 16 are processed as one piece, the thickness of all the connecting pieces 17 and the discharge piece 16 is the same, but the height of the connecting piece 17 must be significantly greater than the thickness of the discharge piece 16. This can not only firmly fix the discharge piece 16 and facilitate operation, but also roughly constrain the spacing between adjacent discharge pieces 16.

[0039] See also Figure 10 In other embodiments, the connecting piece 17 can also be cylindrical, with one connecting piece 17 coaxially fixed to one side of the discharge piece 16. The processing cost and difficulty of the cylindrical connecting piece 17 will be higher than that of the above-mentioned connecting piece 17, but it is still a better choice. The connecting piece 17 in this embodiment can also be integrally connected to the discharge piece 16. During processing, the discharge tip 18 is first obtained by punching out a thin plate, and then bent to form a mutually perpendicular and plate-shaped discharge piece 16 and connecting piece 17, and finally bent to form an annular discharge piece 16 and connecting piece 17.

[0040] Working process: exhaust gas enters the exhaust gas purification chamber 1 from the air inlet 101, the distribution box 3 supplies power to the discharge plate 16, there is a gap between the discharge plate 16 and the discharge sleeve 7, the discharge tip 18 discharges to generate plasma, and the low-temperature plasma reacts with the pollutants in the exhaust gas to achieve the purpose of purifying the exhaust gas, and the purified gas is discharged from the exhaust port 102.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A low-temperature plasma waste gas purification device, characterized by: The waste gas purification chamber (1) comprises a waste gas purification chamber (1) and a plurality of plasma purification units (4) arranged side by side in the waste gas purification chamber (1); a disassembly window (103) corresponding to the plasma purification unit (4) is provided on the waste gas purification chamber (1); a sealing door (2) is provided at each disassembly window (103); and an air inlet (101) and an air outlet (102) are respectively provided at both ends of the waste gas purification chamber (1); The plasma purification unit (4) comprises a fixed bracket, a plasma discharge rod (8) and a discharge sleeve (7), wherein a plurality of discharge sleeves (7) are fixed on the fixed bracket, the plasma discharge rod (8) is coaxially arranged in the discharge sleeve (7), one end of the plasma discharge rod (8) extends out of the discharge sleeve (7) and is connected to the fixed bracket, a plurality of annular discharge plates (16) are provided on the plasma discharge rod (8), the plurality of discharge plates (16) are arranged in parallel and at intervals, a plurality of discharge tips (18) are provided on the circumferential outer side of each discharge plate (16), a connecting plate (17) arranged along the axial direction is provided on the inner side of the discharge plate (16), and the connecting plate (17) is fixedly connected to the plasma discharge rod (8).

2. The low-temperature plasma exhaust gas purification device according to claim 1, characterized in that: The plurality of connecting pieces (17) are evenly arranged around the center of the discharge piece (16).

3. The low-temperature plasma exhaust gas purification device according to claim 1 or 2, characterized in that: The connecting piece (17) and the discharge piece (16) are an integrated structure.

4. The low-temperature plasma exhaust gas purification device according to claim 2, characterized in that: The connecting piece (17) is arc-shaped.

5. The low-temperature plasma exhaust gas purification device according to claim 1, characterized in that: There is one connecting piece (17) in a cylindrical shape.

6. The low-temperature plasma exhaust gas purification device according to claim 1, characterized in that: The axial height of the connecting piece (17) is 3-10 times the thickness of the discharge piece (16).

7. The low-temperature plasma exhaust gas purification device according to claim 1, characterized in that: The fixing bracket comprises a first fixing plate (5), a second fixing plate (6) and a fixing rod (10); two ends of the discharge sleeve (7) are fixedly connected to the first fixing plate (5) and the second fixing plate (6), respectively; the fixing rod (10) is fixed to a side of the second fixing plate (6) away from the first fixing plate (5) via an insulating component; and one end of the plasma discharge rod (8) is fixedly connected to the fixing rod (10) via a discharge rod fixing component.

8. The low-temperature plasma exhaust gas purification device according to claim 7, characterized in that: The discharge rod fixing assembly comprises an adjusting sleeve (12) and a fixing seat (13); the adjusting sleeve (12) is fixedly sleeved on the fixing rod (10); a side surface of the adjusting sleeve (12) is threadedly connected with an adjusting top screw (15); the fixing seat (13) is fixed to one side of the adjusting sleeve (12); and one end of the plasma discharge rod (8) is fixed to the fixing seat (13) via a clamp (14).

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