Pre-charge adjustable high-voltage wire inlet system of electric dust remover

Abstract

The utility model belongs to the field of dust removal and environmental protection of a coal-fired power plant, and particularly relates to a pre-charged adjustable high-voltage wire inlet system of an electric precipitator, which comprises a pre-charged device and a wall bushing which are arranged at the front end of the electric precipitator, the pre-charged device is provided with a high-voltage power supply, and the high-voltage power supply is provided with a double-switch disconnecting link and is connected with an insulating pillar through a high-voltage lead. Every two adjacent insulation supporting columns are connected through a rigid material, and the last insulation supporting column is connected with a wall bushing on a wall plate through a high-voltage wire and then connected with a pre-charging device to conduct power supply. According to the utility model, one high-voltage power supply is used for supplying power to the pre-charging devices arranged on the two or more loudspeakers, each pre-charging device can be independently disconnected without influencing the normal operation of other pre-charging devices and an electric field under the condition that a main power supply is not cut off, and on the premise that the pre-charging devices normally operate the required high-voltage power supply, the pre-charging devices can be independently disconnected. The construction cost is greatly saved, and the market competitiveness is improved.

Description

Technical Field

[0001] The utility model relates to the field of dust removal and environmental protection in coal-fired power plants, and specifically relates to a pre-charging adjustable high-voltage incoming line system for an electrostatic precipitator. Background Technique

[0002] The high-voltage system of an electrostatic precipitator is one of the key technologies for the efficient operation of an electrostatic precipitator and an important component of the electrostatic precipitator. The selection of the high-voltage system directly affects the dust removal efficiency of the electrostatic precipitator. To improve the dust collection efficiency of the electrostatic precipitator, currently on the market, a pre-charging device is set at the inlet horn of the electrostatic precipitator and is equipped with a high-voltage system. The dust is pre-charged before entering the electric field to improve the dust collection ability of the anode plate of the electric field. Usually, the high-voltage incoming line passes through the wall using a wall bushing for connection, and then the power supply is introduced into the electric field.

[0003] Affected by market demand and site limitations, currently most dust collector units are above 300MW units. Each dust collector is provided with 2 or more dust removal chambers. Each dust removal chamber corresponds to an inlet horn, and each inlet horn is provided with a pre-charging device. Currently, the conventional power supply configuration is that one pre-charging device is adapted to one high-voltage power supply. This configuration has a high cost and no market competitiveness. Moreover, the conventional wall bushing and the protective bushing are fixedly connected. Due to site limitations and considering the cost of equipment, the overall equipment layout is very compact. The connecting wire of the wall bushing conducting the cathode system is very likely to interfere with other equipment or be less than the safe discharge distance, especially in some renovation projects where the space limitation is greater and the installation risk of the wall bushing and the protective bushing is higher, which is likely to affect the safe use of the electrostatic precipitator or the efficient operation of the electrostatic precipitation. At the same time, there is also a problem that the high-voltage outgoing line and the insulating support have inaccurate position accuracy, resulting in the inability to connect the conductive material as required. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a pre-charging adjustable high-voltage incoming line system for an electrostatic precipitator, which solves the problems mentioned in the above background technique on the premise of ensuring the high-voltage power supply required for the normal operation of the pre-charging device.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pre-charging adjustable high-voltage incoming line system for an electrostatic precipitator, including a pre-charging device and a wall bushing arranged at the front end of the electrostatic precipitator. The pre-charging device is equipped with a high-voltage power supply. The high-voltage power supply is provided with a double-switch knife switch. The double-switch knife switch is connected to an insulating support through a high-voltage wire. Multiple insulating supports can be set. Rigid materials are used to connect between adjacent two insulating supports. The last insulating support is connected to the wall bushing on the wall panel through a high-voltage wire, and then is connected and conducted to supply power to the pre-charging device.

[0006] Furthermore, the wall-piercing bushing is arranged inside a protective casing. A support is provided at the bottom of the wall-piercing bushing. A roller is provided at the bottom of the support. A track is provided at the lower end corresponding to the roller. The roller is slidably installed in the track. The track is fixed on a track backing plate. The track backing plate is supported and fixed at the bottom of the protective casing.

[0007] Furthermore, support plates are provided on the left and right sides of the support. Two rollers are provided at the lower end of each support plate.

[0008] Furthermore, a stopping device is provided on the roller.

[0009] Furthermore, each dust collector is provided with 2 or more dust removal chambers. Each dust removal chamber corresponds to an inlet horn. The pre-charging device and the wall-piercing bushing are provided on each inlet horn. The double-switch knife switch is in a multi-group parallel mode. Each group of double-switch knife switches is respectively connected to the insulating post through a high-voltage wire, and then connected to multiple insulating posts in sequence through a rigid material. The last insulating post is connected to the wall-piercing bushing of the corresponding bell mouth through a high-voltage wire.

[0010] Compared with the prior art, the present utility model provides a pre-charging adjustable high-voltage incoming line system for an electrostatic precipitator, having the following beneficial effects:

[0011] 1. The present utility model supplies power to the pre-charging devices arranged on two or more horns through a single high-voltage power supply. Without cutting off the total power supply, each pre-charging device can be separately disconnected, without affecting the normal operation of other pre-charging and electric fields. On the premise of the high-voltage power supply required for the normal operation of the pre-charging device, the project cost is greatly saved, and the market competitiveness is improved.

[0012] 2. The movable wall-piercing bushing of the present utility model has the function of effectively adjusting the safe discharge distance between the high-voltage wire and other equipment, avoiding the influence on the safety of the equipment and the efficient operation of the electric field caused by insufficient safe discharge distance on site. Compared with the traditional structure, the equipment transformation cost is greatly reduced, the transformation construction period is shortened, and the production efficiency is improved.

[0013] 3. The high-voltage outgoing line and the wall-piercing bushing incoming line of the present utility model are connected to the insulating posts through high-voltage wires, and the insulating posts are connected to each other through rigid materials. The stiffness between the insulating posts and the flexibility and adjustability of the high-voltage outgoing line and the wall-piercing bushing incoming line are fully considered, which can not only adapt to the on-site situation, but also ensure the position accuracy of the high-voltage outgoing line and the insulating post, improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system connection inside a single bell mouth of the present utility model;

[0015] Figure 2 In Figure 1 Installation schematic diagram of the wall-piercing bushing in the A direction in

[0016] Figure 3 In Figure 2 Installation schematic diagram of the support in the B direction in

[0017] Figure 4 System connection schematic diagram of the double bell mouth of the present utility model.

[0018] In the figure: 1 - high-voltage power supply, 2 - double-switch disconnecting switch, 3 - high-voltage wire, 4 - insulating support, 5 - protective sleeve, 6 - wall-piercing bushing, 7 - pre-charging device, 8 - support, 9 - stopping device, 10 - roller, 11 - track, 12 - track tie plate, 13 - rigid material, 14 - support plate. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , in this implementation solution: An adjustable pre-charging high-voltage inlet system for an electrostatic precipitator includes a pre-charging device 7 provided at the front end of the electrostatic precipitator. The pre-charging device 7 is equipped with a high-voltage power supply 1. The high-voltage power supply 1 is provided with a double-switch disconnecting switch 2. The high-voltage output is carried out through the double-switch disconnecting switch 2 and is connected to the insulating support 4 through the high-voltage wire 3. Multiple insulating supports 4 can be provided, and adjacent two insulating supports 4 are connected by a rigid material 13. The last insulating support 4 is connected to the wall-piercing bushing 6 on the wall through the high-voltage wire 3, and then is connected and conducted to supply power to the pre-charging device 7.

[0021] Furthermore, as in Figure 2 , 3As shown in the figure, the wall-piercing bushing 6 is arranged inside the protecting bushing 5. The bottom of the wall-piercing bushing 6 is connected to a support 8 by means of bolt connection. The bottom of the support 8 is provided with rollers 10. In this embodiment, support plates 14 are provided on both the left and right sides of the support 8, and two rollers 10 are provided on each side of the support plate 14. A stopping device 9 is provided at the rollers 10. At the corresponding position below the rollers 10, a track 11 is provided, and the rollers 10 can slide freely on the track 11. The track 11 is supported and fixed on the track tie plate 12. The track tie plate 12 is supported and fixed at the bottom of the protecting bushing 5. The support 8 can drive the wall-piercing bushing 6 to move in the protecting bushing 5 along the track 11 to adjust the safe discharge distance between the high-voltage conductor 3 and other equipment. After the adjustment is completed, it can be fixed by the stopping device 9.

[0022] Furthermore, as Figure 4 shown, each dust collector is provided with 2 or more dust removal chambers. Each dust removal chamber corresponds to an inlet horn. Each inlet horn is provided with a pre-charging device 7 and a wall-piercing bushing 6. The double-switch disconnector 2 is in a multi-group parallel mode. The number of the double-switch disconnectors 2 is determined according to the actual number of the pre-charging devices 7. Each group of double-switch disconnectors 2 is respectively connected to an insulating support 4 through a high-voltage conductor 3, and then successively connected to a plurality of insulating supports 4 through a rigid material 13. The last insulating support 4 is connected to the wall-piercing bushing 6 of the corresponding bell mouth through a high-voltage conductor 3, so as to realize that one high-voltage power supply 1 supplies high voltage to the pre-charging devices 7 arranged on two or more horns of the electrostatic precipitator through the double-switch disconnector 2 respectively. On the premise that the main power supply is not cut off, each pre-charging device 7 can be separately disconnected.

[0023] The utility model supplies power to the pre-charging devices 7 arranged on two or more horns through one high-voltage power supply 1. On the premise that the main power supply is not cut off, each pre-charging device 7 can be separately disconnected without affecting the normal operation of other pre-charging and electric fields. On the premise of the high-voltage power supply required for the normal operation of the pre-charging device 7, the problem that one high-voltage power supply 1 can only supply power to one pre-charging device 7 is solved, greatly saving the project cost and improving the market competitiveness.

[0024] The movable wall-piercing bushing 6 can move in the protecting bushing 5 according to the actual situation on site to adjust the safe discharge distance between the high-voltage conductor 3 and other equipment, and then fix the wall-piercing bushing 6 through the stopping device 9. The movable wall-piercing bushing 6 has the function of effectively adjusting the safe discharge distance between the high-voltage conductor 3 and other equipment, avoiding the influence on the safety of the equipment and the efficient operation of the electric field caused by insufficient safe discharge distance on site. The problem that the fixed wall-piercing bushing affects the safety or efficient operation of the whole system due to insufficient installation accuracy, many surrounding space equipment and other reasons is solved. Compared with the traditional structure, the equipment transformation cost is greatly reduced, the transformation period is shortened, and the production efficiency is improved.

[0025] The high-voltage outgoing line and the wall-penetrating bushing 6 incoming line are connected by the high-voltage wire 3, and the insulating supports 4 are connected by the rigid material 13. The stiffness between the insulating supports 4 and the flexibility and adjustability of the high-voltage outgoing line and the wall-penetrating bushing 6 incoming line are fully considered, and the problems that the high-voltage outgoing line and the insulating support 4 cannot be connected as required due to low position accuracy of the conductive material are solved.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable high-voltage inlet line system for an electrostatic precipitator with precharge, characterized in that: It includes a pre-charging device and a wall bushing arranged at the front end of the electrostatic precipitator. The pre-charging device is equipped with a high-voltage power supply. The high-voltage power supply is provided with a double switch knife switch. The double switch knife switch is connected to an insulating pillar through a high-voltage wire. A plurality of insulating pillars can be provided. Two adjacent insulating pillars are connected by rigid materials. The last insulating pillar is connected to the wall bushing on the wall panel through a high-voltage wire, and then connected to the pre-charging device to conduct power supply.

2. The electrostatic precipitator precharge adjustable high-voltage inlet line system according to claim 1, characterized in that: The wall sleeve is arranged inside a protective sleeve, a support seat is provided at the bottom of the wall sleeve, a roller is provided at the bottom of the support seat, a track is provided at the lower end of the position corresponding to the roller, the roller can be slidably installed in the track, the track is fixed on a track pad, and the track pad supports and is fixed to the bottom of the protective sleeve.

3. The electrostatic precipitator precharge adjustable high-voltage inlet line system according to claim 2 is characterized by: Support plates are arranged on the left and right sides of the support, and two rollers are arranged on the lower end of the support plate on each side.

4. The electrostatic precipitator precharge adjustable high-voltage inlet line system according to claim 3 is characterized by: The roller is provided with a stopping device.

5. The electrostatic precipitator precharge adjustable high-voltage inlet line system according to claim 1, characterized in that: Each of the dust collectors is provided with two or more dust removal chambers, each of the dust removal chambers corresponds to an inlet horn, each of the inlet horns is provided with the pre-charging device and the wall bushing, the double switch knife switches are multiple groups in parallel mode, each group of the double switch knife switches is connected to the insulating pillars through high-voltage wires, and then multiple insulating pillars are connected in sequence through rigid materials, and the last insulating pillar is connected to the wall bushing of the corresponding horn mouth through a high-voltage wire.

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