Electrostatic precipitator cathode bottom fixing device, cathode system and electrostatic precipitator

Abstract

The invention relates to a cathode bottom fixing device for an electrostatic precipitator, a cathode system and an electrostatic precipitator, comprising a cathode frame for fixing to the bottom end of a cathode line, wherein both ends of the cathode frame are provided with a first permanent magnet, and an electrostatic precipitator shell corresponding to the two ends of the cathode frame is provided with a second permanent magnet corresponding to the first permanent magnet, wherein the first permanent magnet and the second permanent magnet are permanent magnets of the same polarity so that a repulsive force is generated between the first permanent magnet and the second permanent magnet, and the use of the fixing device of the invention reduces energy consumption and reduces maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic precipitators, and in particular to a cathode bottom fixing device of an electrostatic precipitator, a cathode system and an electrostatic precipitator. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The electrostatic precipitator is divided into a positive and negative two-stage system. The anode is connected to the precipitator shell and there is no shaking problem. The cathode is suspended through the top structure of the precipitator, which is prone to shaking and affects the stability of the electric field. Figure 1-Figure 2 As shown, the conventional practice is to use an insulating porcelain bottle 8 to connect the end of the cathode frame 2 connected to the bottom of the cathode line 1 to the external shell to fix the cathode system, so as to prevent short-circuit discharge between the anode and cathode, effectively limit the shaking of the cathode system, and stabilize the electric field. In order to prevent condensation on the flue gas from causing short-circuit on the surface of the porcelain bottle, hot air blowing is required for the pulling box. Generally, electric heating or steam heating is used to heat the sealed air to a temperature higher than the temperature of the flue gas treated by the electrostatic precipitator, and then the heated air is used for blowing, which consumes a lot of energy. In addition, the dust naturally carried in the air will accumulate on the surface of the insulating porcelain bottle during long-term operation, reducing the insulation performance and making discharge prone. It is necessary to shut down the machine regularly to clean the dust on the surface, and the operation and maintenance cost is high. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a cathode bottom fixing device for an electrostatic precipitator, a cathode system and an electrostatic precipitator, thereby reducing energy consumption and maintenance costs.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides a device for fixing the bottom of the cathode of an electrostatic precipitator, comprising a cathode frame for fixing to the bottom end of the cathode wire, wherein a first permanent magnet is provided at both ends of the cathode frame, and a second permanent magnet corresponding to the first permanent magnet is provided on the electrostatic precipitator casing corresponding to the two ends of the cathode frame, wherein the first permanent magnet and the second permanent magnet are permanent magnets of the same polarity so that a repulsive force is generated between the first permanent magnet and the second permanent magnet.

[0007] Optionally, the first permanent magnet is detachably connected to the end of the cathode frame.

[0008] Optionally, a first flange matching the first permanent magnet is provided on the inner side of the first permanent magnet, the first flange is fixedly connected to the end of the cathode frame, the first permanent magnet and the first flange are provided with corresponding first fixing holes, and the first permanent magnet and the first flange are detachably fixedly connected through the first fixing holes and threaded fasteners.

[0009] Optionally, the end surfaces of the first flange and the first permanent magnet that cooperate with each other are provided with a boss, and the first flange is in contact with the boss of the first permanent magnet.

[0010] Optionally, the second permanent magnet is detachably connected to the electrostatic precipitator casing.

[0011] Optionally, a second flange matching the second permanent magnet is provided on the outer side of the second permanent magnet, the second flange is fixedly connected to the outer casing of the electrostatic precipitator, the second permanent magnet and the second flange are provided with corresponding second fixing holes, and the second permanent magnet and the second flange are removably fixedly connected through the second fixing holes and threaded fasteners.

[0012] Optionally, the end surfaces of the second flange and the second permanent magnet that cooperate with each other are provided with a boss, and the second flange and the boss of the second permanent magnet are in contact.

[0013] Optionally, the shapes of the first permanent magnet and the second permanent magnet match each other, and they adopt a circular or square plate structure.

[0014] In a second aspect, an embodiment of the present invention provides an electrostatic precipitator cathode system, which is provided with the electrostatic precipitator cathode bottom fixing device described in the first aspect, and also includes a cathode wire, the top of the cathode wire is connected to the suspension device, and the bottom of the cathode wire is connected to the cathode frame of the electrostatic precipitator cathode bottom fixing device.

[0015] In a third aspect, an embodiment of the present invention provides an electrostatic precipitator provided with the electrostatic precipitator cathode system described in the second aspect.

[0016] The beneficial effects of the present invention are as follows:

[0017] The bottom fixing device of the cathode of the electrostatic precipitator of the present invention has a first permanent magnet on the end of the cathode frame, and a second permanent magnet corresponding to the first permanent magnet is provided on the outer shell of the electrostatic precipitator. The first permanent magnet and the second permanent magnet are permanent magnets of the same polarity. When the cathode shakes toward one side, the first permanent magnet and the second permanent magnet on this side tend to approach each other. Under the action of the repulsive force of the first permanent magnet and the second permanent magnet, the shaking trend is prevented, thereby maintaining the stability of the electric field. There is no need to use an insulating porcelain bottle for fixing, there will be no phenomenon of creepage short circuit on the surface of the porcelain bottle, and there is no need to use hot air to blow the pulling box, thereby reducing energy consumption. At the same time, the first permanent magnet and the second permanent magnet are non-contact, and there will be no discharge. There is no need to stop the machine regularly to clean the dust on the surface, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is the main view of the existing cathode bottom fixing method;

[0020] Figure 2 It is a top view of the existing cathode bottom fixing method;

[0021] Figure 3 This is a front view of the fixing device of Example 1 of the present invention;

[0022] Figure 4 is a top view of a fixing device according to embodiment 1 of the present invention;

[0023] Among them, 1. cathode wire, 2. cathode frame, 3. first permanent magnet, 4. outer shell, 5. second permanent magnet, 6. first flange, 7. second flange, 8. insulating porcelain bottle. DETAILED DESCRIPTION

[0024] Example 1

[0025] This embodiment provides a cathode bottom fixing device for an electrostatic precipitator, such as Figure 3-Figure 4 As shown, it includes a cathode frame 2, which is used to connect to the bottom of the cathode line 1 of the electrostatic precipitator. The cathode frame 2 can adopt the existing technology, and its specific structure is not described in detail here. The two ends of the cathode frame 2 are fixed with a first permanent magnet 3, and the parts of the outer shell 4 of the electrostatic precipitator corresponding to the two ends of the cathode frame 2 are fixed with a second permanent magnet 5. The first permanent magnet 3 and the second permanent magnet 5 correspond to each other, and the first permanent magnet 3 and the second permanent magnet 5 are permanent magnets of the same polarity, and a repulsive force can be generated between the first permanent magnet 3 and the second permanent magnet 5.

[0026] The first permanent magnet 3 and the second permanent magnet 5 match in shape and adopt a circular or square plate structure. In this embodiment, the first permanent magnet 3 and the second permanent magnet 5 adopt a circular plate structure to facilitate matching with the flange.

[0027] Preferably, the first permanent magnet 3 and the second permanent magnet 5 have the same size.

[0028] In this embodiment, the first permanent magnet 3 is detachably fixed to the end of the cathode frame 2. Specifically:

[0029] A first flange 6 matching with the first permanent magnet 3 is disposed on the inner side of the first permanent magnet 3 . The shape and size of the first flange 6 are the same as those of the first permanent magnet 3 .

[0030] The outer edge of the first flange 6 is provided with a plurality of fixing holes at equal intervals along the circumferential direction. Correspondingly, the outer edge of the first permanent magnet 3 is also provided with a plurality of corresponding fixing holes. The first permanent magnet 3 and the first flange 6 are detachably fixedly connected via the fixing holes and threaded fasteners. In this embodiment, the threaded fasteners may be bolts or nuts.

[0031] A boss is provided in the middle of the outer end surface of the first flange 6 , and correspondingly, a boss is also provided in the middle of the inner end surface of the first permanent magnet 3 , and the bosses of the first flange 6 and the first permanent magnet 3 are in contact with each other.

[0032] The center position of the inner end surface of the first flange 6 is fixedly connected to the end of the cathode frame 2 . Preferably, the middle position of the inner end surface of the first flange 6 is welded and fixed to the end of the internal profile of the cathode frame 2 .

[0033] The second permanent magnet 5 is detachably fixed on the housing 4 of the electrostatic precipitator.

[0034] Specifically, a second flange 7 matched with the second permanent magnet 5 is disposed on the outer side of the second permanent magnet 5 , and the shape and size of the second flange 7 are the same as those of the second permanent magnet 5 .

[0035] The outer edge of the second flange 7 is provided with a plurality of fixing holes along the circumferential direction, and correspondingly, the outer edge of the second permanent magnet 5 is provided with a plurality of corresponding fixing holes, and the second flange 7 and the second permanent magnet 5 are detachably fixedly connected through the fixing holes and threaded fasteners. In this embodiment, the threaded fasteners can be bolts and nuts.

[0036] A boss is provided at the center of the inner end surface of the second flange 7 , and a boss is provided at the middle position of the outer end surface of the second permanent magnet 5 . The bosses of the second flange 7 and the second permanent magnet 5 are in contact with each other.

[0037] The second flange 7 is fixedly connected to the outer shell 4 of the electrostatic precipitator. Preferably, the outer edge of the second flange 7 is welded and fixed to the outer shell 4 of the electrostatic precipitator.

[0038] Using the cathode bottom fixing device of the electrostatic precipitator of the present embodiment, when the cathode wire shakes, the first permanent magnet 3 and the second permanent magnet 5 on one side of the cathode frame tend to approach each other. Since the first permanent magnet 3 and the second permanent magnet 5 are permanent magnets of the same polarity, a repulsive force is generated between the first permanent magnet 3 and the second permanent magnet 5, preventing the first permanent magnet 3 and the second permanent magnet 5 from approaching each other. When the cathode wire 1 shakes so that the first permanent magnet 3 and the second permanent magnet 5 move away from each other, the first permanent magnet 3 and the second permanent magnet 5 on the other side of the cathode frame 2 tend to approach each other. Under the action of the repulsive force between the first permanent magnet 3 and the second permanent magnet 5, this tendency is prevented, thereby preventing the cathode wire from shaking and maintaining the stability of the electric field.

[0039] In this embodiment, the repulsive force of the first permanent magnet 3 and the second permanent magnet 5 is used to effectively isolate the positive and negative poles, prevent short-circuit discharge between the positive and negative poles, effectively limit the shaking of the cathode system, and stabilize the electric field. Compared with the traditional bottom fixing device, there is no need to use an insulating porcelain bottle for fixing, there will be no phenomenon of creeping short circuit on the surface of the porcelain bottle, and there is no need to use hot air to blow the pulling box, which reduces energy consumption. At the same time, the first permanent magnet and the second permanent magnet are non-contact, and there will be no discharge. There is no need to stop the machine regularly to clean the dust on the surface, which reduces maintenance costs.

[0040] Example 2

[0041] The present embodiment provides an electrostatic precipitator cathode system, comprising the electrostatic precipitator cathode bottom fixing device described in Example 1, and also comprising a cathode wire 1, the bottom of the cathode wire 1 is fixedly connected to the cathode frame 2 of the electrostatic precipitator cathode bottom fixing device, and the top of the cathode wire 1 is connected to the suspension device 8. The cathode wire 1 and the suspension device 8 can adopt the existing technology and will not be described in detail here. The connection method between the cathode wire 1 and the cathode frame 2 can adopt the existing technology and will not be described in detail here.

[0042] Example 3

[0043] This embodiment provides an electrostatic precipitator, which is provided with the electrostatic precipitator cathode system described in Embodiment 2. The remaining structure of the electrostatic precipitator can adopt the existing technology and will not be described in detail here.

[0044] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cathode bottom fixing device for an electrostatic precipitator, comprising a cathode frame for fixing to the bottom end of a cathode line, characterized in that: A first permanent magnet is provided at both ends of the cathode frame, and a second permanent magnet corresponding to the first permanent magnet is provided on the electrostatic precipitator housing corresponding to the two ends of the cathode frame. The first permanent magnet and the second permanent magnet are permanent magnets of the same polarity so that a repulsive force is generated between the first permanent magnet and the second permanent magnet.

2. The cathode bottom fixing device of an electrostatic precipitator according to claim 1, characterized in that: The first permanent magnet is detachably connected to the end of the cathode frame.

3. The cathode bottom fixing device of an electrostatic precipitator according to claim 2, characterized in that: A first flange matching the first permanent magnet is provided on the inner side of the first permanent magnet, the first flange is fixedly connected to the end of the cathode frame, the first permanent magnet and the first flange are provided with corresponding first fixing holes, and the first permanent magnet and the first flange are detachably fixedly connected through the first fixing holes and threaded fasteners.

4. The cathode bottom fixing device of an electrostatic precipitator according to claim 3, characterized in that: The end surfaces of the first flange and the first permanent magnet that cooperate with each other are provided with bosses, and the first flange is in contact with the bosses of the first permanent magnet.

5. The cathode bottom fixing device of an electrostatic precipitator according to claim 1, characterized in that: The second permanent magnet is detachably connected to the electrostatic precipitator housing.

6. The cathode bottom fixing device of an electrostatic precipitator according to claim 5, characterized in that: A second flange matching the second permanent magnet is provided on the outer side of the second permanent magnet. The second flange is fixedly connected to the outer shell of the electrostatic precipitator. The second permanent magnet and the second flange are provided with corresponding second fixing holes. The second permanent magnet and the second flange are detachably fixedly connected through the second fixing holes and threaded fasteners.

7. The cathode bottom fixing device of an electrostatic precipitator according to claim 6, characterized in that: The end surfaces of the second flange and the second permanent magnet that cooperate with each other are provided with bosses, and the second flange and the bosses of the second permanent magnet are in contact.

8. The cathode bottom fixing device of an electrostatic precipitator according to claim 1, characterized in that: The shapes of the first permanent magnet and the second permanent magnet match each other, and they adopt a circular or square plate structure.

9. An electrostatic precipitator cathode system, characterized in that: The electrostatic precipitator cathode bottom fixing device according to any one of claims 1 to 8 is provided, and also includes a cathode wire, the top of the cathode wire is connected to the suspension device, and the bottom of the cathode wire is connected to the cathode frame of the electrostatic precipitator cathode bottom fixing device.

10. An electrostatic precipitator, characterized in that: An electrostatic precipitator cathode system according to claim 9 is provided.

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