Variable-diameter fishbone needle discharge electrode and discharge electrode mechanism

Abstract

The utility model discloses a variable diameter fishbone needle discharge electrode and discharge electrode mechanism, including anode tube and cathode subassembly, cathode subassembly is along anode tube inner chamber axial arrangement, and cathode subassembly includes the fixed setting of outer electrode relative to anode tube, the inner electrode of along outer electrode inner chamber axial arrangement and the discharge needle of rotation setting on inner electrode and from inner electrode to the distribution of outside through outer electrode, is equipped with the interelectrode distance adjusting subassembly on inner electrode, is used for driving inner electrode and moves along outer electrode inner chamber to change the discharge needle end same anode tube interval, the utility model discloses can when adapting the corona closed condition of smoke quantity fluctuation change, fine particle causes, through the discharge needle with inner electrode movement, utilize the spacing of outer electrode inner wall under the limiting effect, can realize the rotation of discharge needle relative to inner electrode, the spacing between discharge needle end and anode tube inner wall will change along with the rotation process to change the purpose of interelectrode distance.

Description

Technical Field

[0001] This utility model relates to the field of dust collector technology, specifically to a variable diameter fishbone needle discharge electrode and discharge electrode mechanism. Background Technology

[0002] Electrostatic precipitators (ESPs) are a common type of dust removal equipment, divided into wet ESPs and dry ESPs. The dust removal principles of wet and dry ESPs are basically the same, both using electrostatic attraction to adsorb dust. The difference lies in the cleaning method after dust collection. Wet ESPs remove dust by rinsing the electrodes with a cleaning solution, while dry ESPs remove dust by hammering and shaking. Wet ESPs are not limited by resistivity when collecting particulate matter, have high efficiency in removing inhalable dust, and can also adsorb gases, removing sulfuric acid mist and harmful substances such as heavy metals from flue gas. Therefore, wet ESPs are currently recognized as the most effective equipment for treating flue gas after desulfurization.

[0003] However, the electrode spacing between the discharge electrode and the collection electrode of existing dust collectors is fixed, which cannot be used for situations such as flue gas volume fluctuations, corona blockage caused by fine particles, etc. At the same time, it cannot effectively adjust the energy injection of the electric field, thus failing to meet the usage requirements of dust collectors. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a variable diameter fishbone needle discharge electrode and discharge electrode mechanism. By moving the discharge needle with the inner electrode and using the limiting effect of the inner wall of the outer electrode, the discharge needle can be rotated relative to the inner electrode, so that the distance between the end of the discharge needle and the inner wall of the anode tube will change during the rotation process, thereby achieving the purpose of changing the electrode spacing.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A variable-diameter fishbone needle discharge electrode includes an anode tube and a cathode assembly. The cathode assembly is axially arranged along the inner cavity of the anode tube. The cathode assembly includes an outer electrode fixedly arranged relative to the anode tube, an inner electrode axially arranged along the inner cavity of the outer electrode, and discharge needles rotatably arranged on the inner electrode and distributed from the inner electrode outward through the outer electrode. The inner electrode is provided with an electrode spacing adjustment assembly for driving the inner electrode to move along the inner cavity of the outer electrode to change the distance between the end of the discharge needle and the anode tube.

[0006] Furthermore, the electrode spacing adjustment assembly includes a lower connector for fixing the outer electrode, an upper connector for fixing the inner electrode, and a drive for driving the upper connector to move relative to the lower connector.

[0007] Furthermore, the discharge needles are multiple sets evenly distributed along the outer wall of the inner electrode axis.

[0008] Furthermore, each group of discharge needles consists of three needles evenly distributed along the outer wall of the inner electrode circumferentially.

[0009] Furthermore, the discharge needle includes a transition portion rotatably connected to the outer wall of the inner electrode, an electrode body extending outward from the transition portion, and a discharge tip disposed at the end of the electrode body.

[0010] Furthermore, the outer wall of the inner electrode is provided with a mounting groove, a positioning post is fixed in the mounting groove, and the end of the adapter near the inner electrode is provided with a mounting hole that cooperates with the positioning post.

[0011] Furthermore, the outer electrode sidewall is provided with a through hole for the movement of the discharge needle.

[0012] Furthermore, the cross-section of the anode tube is a regular hexagon.

[0013] This utility model proposes a discharge electrode mechanism, including a plurality of variable diameter fishbone needle discharge electrodes, which are arranged in a honeycomb pattern.

[0014] Furthermore, it includes fixing plates disposed at both ends of the anode tube and an upper frame for connecting several upper connecting parts, the upper frame including transverse bars and vertical bars orthogonally distributed in the horizontal and vertical directions.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) When the electrode distance between the discharge needle and the anode tube needs to be adjusted using the technical solution of this utility model, the inner electrode can be moved relative to the inner cavity of the outer electrode by driving the inner electrode. Since the discharge needle is rotatably set on the inner electrode and extends outward through the outer electrode, the discharge needle can move synchronously with the inner electrode. At the same time, under the limiting action of the inner wall of the outer electrode, the discharge needle can be rotated relative to the inner electrode. In this way, the distance between the end of the discharge needle and the inner wall of the anode tube will change with the rotation process, thereby achieving the purpose of changing the electrode distance. 2) The discharge electrode mechanism of this utility model includes several variable-diameter fishbone needle discharge electrodes, which are arranged in a honeycomb pattern. The upper connecting parts of the several variable-diameter fishbone needle discharge electrodes are connected to an upper frame, and a driving component can be set on the upper frame. The driving component drives the upper frame, which can drive the several upper connecting parts to move, thereby causing the inner electrode to move relative to the outer electrode, so as to achieve the purpose of synchronously changing the electrode spacing of the several variable-diameter fishbone needle discharge electrodes, which is beneficial to improving the efficiency of the adjustment work. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the variable diameter fishbone needle discharge electrode provided by this utility model; Figure 2for Figure 1 Top view; Figure 3 This is a schematic diagram of the cathode assembly. Figure 4 This is a partial schematic diagram of the cathode assembly; Figure 5 for Figure 4 A schematic diagram of the adjustment of the discharge needle rotation; Figure 6 This is a schematic diagram of the structure of the discharge needle; Figure 7 A schematic diagram of the discharge electrode mechanism provided by this utility model; Figure 8 This is a schematic diagram of the structure connecting the upper frame with several variable-diameter fishbone needle discharge electrodes.

[0017] In the diagram: 10, anode tube; 20, cathode assembly; 210, external electrode; 211, through hole; 220, internal electrode; 221, mounting groove; 230, discharge needle; 231, adapter; 232, electrode body; 233, discharge tip; 240, positioning post; 250, mounting hole; 310, lower connector; 320, upper connector; 40, fixing plate; 50, upper frame; 510, horizontal rod; 520, vertical rod; 60, lower frame. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.

[0019] Reference Figures 1-3A variable-diameter fishbone needle discharge electrode includes an anode tube 10, a cathode assembly 20, and an electrode spacing adjustment assembly. The cathode assembly 20 is axially arranged along the inner cavity of the anode tube 10. Specifically, the cathode assembly includes an outer electrode 210, an inner electrode 220, and a discharge needle 230. The outer electrode 210 is fixed relative to the anode tube 10 and is located at the axial center of the inner cavity of the anode tube 10. The inner electrode 220 is axially arranged along the inner cavity of the outer electrode 210. The discharge needle 230 is rotatably mounted on the inner electrode 220 and is distributed from the inner electrode 220 outwards through the outer electrode 210. The electrode spacing adjustment assembly is disposed on the inner electrode 220. The discharge needle 230 is used to drive the inner electrode 220 to move along the inner cavity of the outer electrode 210 to change the distance between the end of the discharge needle 230 and the anode tube 10. When in use, the end of the discharge needle 230 away from the inner electrode 220 forms an electric field with the inner wall of the anode tube. Under the action of the electric field, the discharge needle undergoes corona discharge, generating a large number of negative ions and electrons. These charged particles fill the space where the electric field is located. The negatively charged particles move towards the anode tube (i.e., the dust collecting electrode) under the action of the electric field force. At the same time, the dust particles in the flue gas are ionized in the electric field. The charged dust also moves towards the anode tube. After the charged dust particles reach the anode tube, they release negative charges and are deposited on the anode tube. In this way, the dust particles are collected, and the purified gas is discharged into the atmosphere.

[0020] When it is necessary to adjust the electrode distance between the discharge needle 230 and the anode tube 10 to adapt to fluctuations in flue gas volume, corona blockage caused by fine particles, etc., the inner electrode 220 can be moved relative to the inner cavity of the outer electrode 210. Since the discharge needle 230 is rotatably mounted on the inner electrode 220 and passes through the outer electrode 210, the discharge needle 230 can move synchronously with the inner electrode 220. At the same time, under the limiting action of the outer electrode 210, the discharge needle 230 can rotate relative to the inner electrode 220. Thus, the distance between the end of the discharge needle 230 and the inner wall of the anode tube 10 will change during the rotation process, thereby achieving the purpose of changing the electrode distance.

[0021] Furthermore, the anode tube 10 is made of stainless steel, and the outer electrode 210, inner electrode 220, and discharge needle 230 that make up the cathode assembly are all made of titanium alloy.

[0022] Reference Figure 2 As a preferred technical solution in this embodiment, the cross-section of the anode tube 10 is a regular hexagon.

[0023] Furthermore, the discharge needles 230 are multiple groups evenly distributed along the axial outer wall of the inner electrode 220, and each group of discharge needles 230 consists of three evenly distributed along the circumferential outer wall of the inner electrode 220. In this way, the distance between two adjacent discharge needles 230 is 120°.

[0024] Reference Figures 4-6 In some embodiments, the discharge needle 230 includes a connecting part 231, an electrode body 232, and a discharge tip 233. The connecting part 231 is rotatably connected to the outer wall of the inner electrode 220. The electrode body 232 extends outward from the connecting part 231, and the discharge tip 233 is located at the end of the electrode body 232. It should be noted that the connecting part 231, the electrode body 232, and the discharge tip 233 are integrally formed, so the discharge needle is a single structure. It is rotatably connected to the inner electrode 220 through the connecting part 231, so the discharge needle 230 can move along the inner cavity of the outer electrode 210 with the inner electrode 220. Under the limiting action of the outer wall of the outer electrode 210, the discharge needle 230 is passively rotated, thereby changing the distance between the discharge tip 233 and the anode tube 10, so as to change the discharge electrode spacing.

[0025] Reference Figures 4-5 Furthermore, to facilitate the installation of the discharge needle 230 and enable its rotation relative to the inner electrode 220, an installation groove 221 is provided on the outer wall of the inner electrode 220, and a positioning post 240 is fixed in the installation groove 221. Correspondingly, the end of the adapter 231 near the inner electrode 220 is provided with an installation hole 250 that cooperates with the positioning post 240. In use, the discharge needle 230 is installed and cooperates with the positioning post 240 through the installation hole 250 on the adapter 231, and the discharge needle 230 can rotate relative to the inner electrode 220 through the installation hole 250.

[0026] Reference Figure 5 Furthermore, to facilitate the discharge needle 230 passing through the outer electrode 210, a through hole 211 for the movement of the discharge needle 230 is provided on the side wall of the outer electrode 210. In use, the end of the discharge needle 230 away from the inner electrode 220 extends outward through the aforementioned through hole 211. It should also be noted that the through hole 211 can contact the outer wall of the discharge needle 230 when the discharge needle 230 moves with the inner electrode 220, thereby driving the discharge needle 230 to rotate relative to the inner electrode 220, so as to realize the rotation of the discharge needle 230 and adjust the distance between the discharge tip 233 and the anode tube 10.

[0027] Reference Figure 1In some embodiments, the electrode spacing adjustment assembly includes a lower connector 310, an upper connector 320, and a driving member. The lower connector 310 is used to fix the outer electrode 210, the upper connector 320 is used to fix the inner electrode 220, and the driving member is used to drive the upper connector 320 to move relative to the lower connector 310. Specifically, in this embodiment, both the lower connector 310 and the upper connector 320 are L-shaped plates, and the driving member can be an electric telescopic rod. In use, the upper connector 320 can be driven to move by the driving member, and the upper connector 320 can then drive the inner electrode 220 to move relative to the inner cavity of the outer electrode 210. The discharge needle 230 rotates along the inner electrode 220 under the obstruction of the outer wall of the outer electrode 210, so as to change the spacing between the discharge tip 233 and the inner wall of the anode tube 10.

[0028] Furthermore, in order to facilitate the connection of the outer electrode 210 with the lower connector 310 and the inner electrode 220 with the upper connector 320, connection holes are provided at the corresponding positions of the outer electrode 210 and the lower connector 310, and at the corresponding positions of the inner electrode 220 and the upper connector 320. Bolts are installed in the aforementioned connection holes. In use, the outer electrode 210 and the lower connector 310, and the inner electrode 220 and the upper connector 320 are fixedly connected by the cooperation of the nut and the bolt.

[0029] Reference Figures 7-8 This utility model also provides a discharge electrode mechanism, including a plurality of the aforementioned variable-diameter fishbone needle discharge electrodes. Specifically, the plurality of variable-diameter fishbone needle discharge electrodes are arranged in a honeycomb pattern. In addition, the discharge electrode mechanism also includes a fixing plate 40 and an upper frame 50. There are two fixing plates 40, and the two fixing plates 40 are fixedly installed at both ends of the anode tube 10. The two fixing plates serve to support and install the anode tube. The upper frame 50 is used to connect a plurality of upper connecting parts 320. Further, the upper frame 50 includes a plurality of transverse rods 510 and a plurality of... The vertical rod 520, and multiple horizontal rods 510 and multiple vertical rods 520 are arranged orthogonally in the horizontal and vertical directions. In this way, the horizontal rods 510 and vertical rods 520 form a grid-like structure. This grid-like structure is used to install the upper connector 320. It should also be noted that in order to achieve the effect of moving the inner electrode 220 relative to the outer electrode 210 through the upper connector 320, the aforementioned driving member can be set on the top of the upper frame 50. In this way, when the driving member is activated, it can drive the entire upper frame to move, thereby driving the multiple upper connectors 320 and the inner electrode 220 to move.

[0030] Furthermore, in order to facilitate the installation and fixing of the lower connector 310, the discharge electrode mechanism also includes a lower frame 60, which serves as a fixing reference and has the effect of fixing and limiting the lower connector 310.

[0031] In use, the end of the discharge needle 230 away from the inner electrode 220 forms an electric field with the inner wall of the anode tube. When the flue gas flows along the inside of the anode tube 10, the dust particles in the flue gas are ionized in the electric field. The charged dust particles reach the anode tube and are deposited on the tube wall. When it is necessary to adapt to fluctuating flue gas volume or corona blockage caused by fine particles, the electrode distance between the discharge needle 230 and the anode tube 10 can be adjusted. This can be achieved by driving the inner electrode 220 to move relative to the inner cavity of the outer electrode 210. Since the discharge needle 230 is rotatably set on the inner electrode 220 and is distributed through the outer electrode 210, the discharge needle 230 can move synchronously with the inner electrode 220. At the same time, under the limiting action of the outer electrode 210, the discharge needle 230 can rotate relative to the inner electrode 220. Thus, the distance between the end of the discharge needle 230 and the inner wall of the anode tube 10 will change during the rotation process, thereby achieving the purpose of changing the electrode distance.

Claims

1. A variable-diameter fishbone needle discharge electrode, comprising an anode tube (10) and a cathode assembly (20), wherein the cathode assembly is axially arranged along the inner cavity of the anode tube (10), and the cathode assembly comprises an outer electrode (210) fixedly arranged relative to the anode tube (10), an inner electrode (220) axially arranged along the inner cavity of the outer electrode (210), and discharge needles (230) rotatably arranged on the inner electrode (220) and distributed from the inner electrode (220) outward through the outer electrode (210), characterized in that... The inner electrode (220) is provided with an electrode spacing adjustment component, which is used to drive the inner electrode (220) to move along the inner cavity of the outer electrode (210) to change the distance between the end of the discharge needle (230) and the anode tube (10).

2. The variable diameter fishbone needle discharge electrode according to claim 1, characterized in that... The electrode spacing adjustment assembly includes a lower connector (310) for fixing the outer electrode (210), an upper connector (320) for fixing the inner electrode (220), and a drive for driving the upper connector (320) to move relative to the lower connector (310).

3. The variable diameter fishbone needle discharge electrode according to claim 1, characterized in that... The discharge needles (230) are multiple sets evenly distributed along the outer wall of the inner electrode (220) along the axial direction.

4. The variable diameter fishbone needle discharge electrode according to claim 3, characterized in that... Each set of discharge needles (230) consists of three needles evenly distributed along the circumferential outer wall of the inner electrode (220).

5. The variable diameter fishbone needle discharge electrode according to claim 4, characterized in that, The discharge needle (230) includes a transition part (231) rotatably connected to the outer wall of the inner electrode (220), an electrode body (232) extending outward from the transition part (231), and a discharge tip (233) disposed at the end of the electrode body (232).

6. The variable diameter fishbone needle discharge electrode according to claim 5, characterized in that, The inner electrode (220) has an installation groove (221) on its outer wall, and a positioning post (240) is fixed in the installation groove (221). The adapter (231) has an installation hole (250) at one end near the inner electrode (220) that matches the positioning post (240).

7. A variable diameter fishbone needle discharge electrode according to claim 6, characterized in that... The outer electrode (210) has a through hole (211) on its side wall for the movement of the discharge needle (230).

8. The variable diameter fishbone needle discharge electrode according to claim 1, characterized in that... The cross-section of the anode tube (10) is a regular hexagon.

9. A discharge electrode mechanism, characterized in that... It includes several variable-diameter fishbone needle discharge electrodes as described in any one of claims 1-8, wherein the several variable-diameter fishbone needle discharge electrodes are arranged in a honeycomb pattern.

10. A discharge electrode mechanism according to claim 9, characterized in that... It includes a fixing plate (40) disposed at both ends of the anode tube (10) and an upper frame (50) for connecting a plurality of upper connectors (320), the upper frame (50) including transverse rods (510) and vertical rods (520) orthogonally distributed in the horizontal and vertical directions.

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