Protection device for electrical tar precipitator

Abstract

The utility model provides a protection device for an electrical tar precipitator, and relates to the technical field of electrical tar precipitators. The device comprises a box body, a heat preservation sleeve, an electrode suspension insulation assembly and an air pressure sealing assembly, the box body is in a vertical barrel shape, the box body is provided with a detachable top cover, and a manhole is formed in the side face of the box body; the heat preservation sleeve is arranged on the outer side of the middle of the box body, the electrode suspension insulation assembly is arranged in the box body and arranged along the central axis of the box body, and the air pressure sealing assembly is arranged on the lower portion in the box body; the electrode suspension assembly comprises a suspension rod, a disc insulator and a guide rod which are sequentially connected from top to bottom, the suspension rod is suspended below an insulating disc, and the insulating disc is clamped on an annular table at the upper part of the box body; the air pressure sealing assembly comprises a first air blocking disc, a second air blocking disc, a first air plug, a second air plug and an inflation nozzle, and the air pressure sealing assembly enables the section of box body to form a pressure sealing cabin so as to keep pressure airtightness. According to the utility model, excellent insulation protection can be formed on the cathode of the electrical tar precipitator, and long-term stable operation of equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic tar precipitators, and particularly to a protection device for an electrostatic tar precipitator. Background Art

[0002] Electrostatic tar precipitators are mainly used for gas purification in industries such as chemical fertilizers, coking, city gas, metallurgy, building materials, carbon, ceramics, etc., to recover tar in gas and coke oven gas, and at the same time remove impurities such as dust and water mist in them, achieving the effects of material recovery and gas purification. The electrostatic tar precipitator uses an electric field generated by high-voltage direct current. The cathode is the corona electrode, and the anode is the precipitation electrode. When the electric field strength between the cathode and the anode exceeds a certain limit, corona discharge occurs between the two electrodes. Tar, dust, water mist and other ions in the gas passing through the electric field combine with ions and electrons to become charged, and move towards the two electrodes under the action of the electric field force.

[0003] Since there is high-voltage electricity between the anode and the cathode, the anode is conducted to the shell, and the cathode needs to be provided with a protection device to isolate it from the anode. This protection device is usually a box containing an insulating structure. The insulators inside the existing cathode insulation protection device often get mixed into the semi-water gas or coke oven gas. A large amount of moisture and oil stains easily make the insulators dirty, resulting in discharge or short circuit, and even high-voltage breakdown, affecting the safe operation of the equipment. Summary of the Utility Model

[0004] Therefore, the utility model provides a protection device for an electrostatic tar precipitator to overcome the above problems existing in the prior art.

[0005] The technical solution of the utility model is as follows:

[0006] A protection device for an electric tar precipitator, comprising a box body, a heat preservation sleeve, an electrode suspension insulation assembly and a pneumatic sealing assembly. The box body is a vertical cylindrical shape, and the box body is provided with a detachable top cover, and a maintenance hole is opened on the side of the box body; the heat preservation sleeve is arranged on the outer side of the middle part of the box body, the electrode suspension insulation assembly is arranged in the box body and along the central axis of the box body, and the pneumatic sealing assembly is arranged in the lower part of the box body; the electrode suspension insulation assembly includes a suspension rod, a disc insulator and a guide rod connected in sequence from top to bottom. The suspension rod is suspended below the insulating disc, and the insulating disc is stuck on the annular platform at the upper part of the box body; the pneumatic sealing assembly includes a first air blocking disc, a second air blocking disc, a first air plug, a second air plug and an inflation nozzle. The outer edges of the first air blocking disc and the second air blocking disc are integrated with the box body. The first air blocking disc is located above the second air blocking disc, and both of them are provided with tapered holes with large-diameter ends facing each other at their centers. The guide rod passes through the tapered holes. The first air plug is an I-shaped disc sleeved at the tapered hole of the first air blocking disc. The lower part of the first air plug is provided with a tapered part matching the tapered hole and a cap gasket part at the bottom. The upper part of the second air plug is a cap gasket part and the lower part is a tapered part matching the tapered hole of the second air blocking disc. The inflation nozzle is arranged on the side of the box body between the first air blocking disc and the second air blocking disc.

[0007] As a preference, the heat preservation sleeve is provided with a liquid inlet at the lower part, and a liquid outlet is provided at the upper part of the heat preservation sleeve and on the opposite side of the liquid inlet. A plurality of heat dissipation fins are arranged in the heat preservation sleeve along the radial direction of the box body to connect the outer wall of the box body, and heating oil circulates in the heat preservation sleeve.

[0008] As a preference, the first air blocking disc and the second air blocking disc are made of phenolic resin, the first air plug and the second air plug are made of rubber, the insulating disc is made of ceramic, the upper end of the suspension rod is provided with an external thread, the center of the insulating disc is provided with a through hole, and the upper end of the suspension rod passes through the through hole and is fixed with a nut.

[0009] As a preference, the first air blocking disc and the second air blocking disc are made of polytetrafluoroethylene, the first air plug and the second air plug are made of rubber, the insulating disc is made of plastic, the upper end of the suspension rod is provided with an external thread, the center of the insulating disc is provided with a through hole, and the upper end of the suspension rod passes through the through hole and is fixed with a nut.

[0010] As a preference, a pneumatic sensor is arranged outside the inflation nozzle, and the pneumatic sensor is electrically connected with a pneumatic alarm device. When the air pressure is lower than the set value, an alarm signal is sent out.

[0011] The working principle and beneficial effects of the present utility model are as follows:

[0012] The utility model provides a protective device for an electric tar collector, which is arranged on the top of the electric tar collector, and the lower end of the device extends into the top plate of the electric tar collector, and the guide rod is electrically connected to the cathode. When the electric tar collector is working, pressurized inert gas such as nitrogen is filled in through the gas nozzle, and the first gas plug and the second gas plug respectively plug the cone holes on the first air barrier plate and the second air barrier plate under the action of the air flow, so that a high-pressure airtight cabin is formed between the first air barrier plate, the second air barrier plate and the box body, so that the wet coal gas below is isolated from the components above the guide rod, so that the disc insulator is kept dry and clean, and the problem of high-voltage discharge is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of a three-dimensional structure after cutting (with Figure 3 Different cutting positions);

[0018] In the figure: 1. box body; 11. ring platform; 12. first air baffle; 13. second air baffle; 14. top cover; 2. inspection hole; 3. insulation sleeve; 31. liquid inlet; 32. liquid outlet; 33. cooling fins; 4. inflation nozzle; 51. insulating disk; 52. disk insulator; 53. nut; 54. guide rod; 55. first air plug; 56. second air plug. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Please refer to Figures 1 to 4As shown in the figure, this embodiment provides a protection device for an electrostatic tar precipitator, which includes a box body 1, a heat preservation sleeve 3, an electrode suspension insulation assembly and a pneumatic sealing assembly. The box body 1 is a vertical cylindrical shape, and the box body 1 is provided with a detachable top cover 14. A maintenance hole 2 is opened on the side of the box body 1. The heat preservation sleeve 3 is arranged on the outer side of the middle part of the box body 1. The electrode suspension insulation assembly is arranged inside the box body 1 and along the central axis of the box body 1. The pneumatic sealing assembly is arranged at the lower part inside the box body 1. The electrode suspension insulation assembly includes a suspension rod, a disc insulator 52 and a guide rod 54 connected in sequence from top to bottom. The suspension rod is suspended below the insulating disc 51, and the insulating disc 51 is stuck on the annular platform 11 at the upper part of the box body 1. The pneumatic sealing assembly includes a first air blocking disc 12, a second air blocking disc 13, a first air plug 55, a second air plug 56 and an inflation nozzle 4. The outer edges of the first air blocking disc 12 and the second air blocking disc 13 are integrated with the box body 1. The first air blocking disc 12 is located above the second air blocking disc 13, and both of them are provided with conical holes with large-diameter ends facing each other at their centers. The guide rod 54 passes through the conical holes. The first air plug 55 is an I-shaped disc sleeved at the conical hole of the first air blocking disc. The lower part of the first air plug 55 is provided with a conical part matching the conical hole and a cap gasket part at the bottom. The upper part of the second air plug 56 is a cap gasket part, and the lower part is a conical part matching the conical hole of the second air blocking disc. The inflation nozzle 4 is arranged on the side of the box body between the first air blocking disc 12 and the second air blocking disc 13.

[0021] Specifically, the heat preservation sleeve 3 is provided with a liquid inlet 31 at the lower part, and a liquid outlet 32 is arranged at the upper part of the heat preservation sleeve 3 and on the opposite side of the liquid inlet 31. A plurality of heat dissipation fins 33 are arranged inside the heat preservation sleeve along the radial direction of the box body to connect the outer wall of the box body. Heating oil circulates inside the heat preservation sleeve 3.

[0022] In order to achieve good insulation under high voltage, the first air blocking disc 12 and the second air blocking disc 13 are preferably made of phenolic resin or polytetrafluoroethylene. The first air plug 55 and the second air plug 56 are preferably made of rubber. The insulating disc 51 is preferably made of ceramic. The upper end of the suspension rod is preferably provided with an external thread. At this time, the center of the insulating disc 51 is provided with a through hole, and the upper end of the suspension rod passes through the through hole and is fixed with a nut 53.

[0023] In order to keep the air pressure within a reasonable range to maintain airtightness, a pressure sensor is preferably arranged outside the inflation nozzle 4. At this time, the pressure sensor is electrically connected to a pressure alarm device, and an alarm signal is sent when the air pressure is lower than the set value.

[0024] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protection device for an electric tar precipitator, characterized in that: It includes a box body, a heat preservation sleeve, an electrode suspension insulation assembly and a pneumatic sealing assembly. The box body is a vertical cylindrical shape with a detachable top cover, and a maintenance hole is provided on the side of the box body; the heat preservation sleeve is arranged on the outer side of the middle part of the box body, the electrode suspension insulation assembly is arranged in the box body and along the central axis of the box body, and the pneumatic sealing assembly is arranged at the lower part in the box body; the electrode suspension insulation assembly includes a suspension rod, a disc insulator and a guide rod connected in sequence from top to bottom. The suspension rod is suspended below the insulating disc, and the insulating disc is stuck on the annular platform at the upper part of the box body; the pneumatic sealing assembly includes a first air blocking disc, a second air blocking disc, a first air plug, a second air plug and an inflation nozzle. The outer edges of the first air blocking disc and the second air blocking disc are integrated with the box body. The first air blocking disc is located above the second air blocking disc, and both of them have conical holes with large-diameter ends facing each other at their centers. The guide rod passes through the conical holes. The first air plug is an I-shaped disc sleeved at the conical hole of the first air blocking disc. The lower part of the first air plug is provided with a conical part matching the conical hole and a cap gasket part at the bottom. The upper part of the second air plug is a cap gasket part and the lower part is a conical part matching the conical hole of the second air blocking disc. The inflation nozzle is arranged on the side of the box body between the first air blocking disc and the second air blocking disc.

2. The protection device for an electric tar precipitator according to claim 1, characterized in that: The heat preservation sleeve is provided with a liquid inlet at the lower part, and a liquid outlet is provided at the upper part of the heat preservation sleeve and on the side opposite to the liquid inlet. A plurality of heat dissipation fins are arranged in the heat preservation sleeve along the radial direction of the box body to connect the outer wall of the box body, and heating oil circulates in the heat preservation sleeve.

3. The protection device for an electric tar precipitator according to claim 2, wherein: The first air blocking disc and the second air blocking disc are made of phenolic resin, the first air plug and the second air plug are made of rubber, the insulating disc is made of ceramic, the upper end of the suspension rod is provided with an external thread, the center of the insulating disc is provided with a through hole, and the upper end of the suspension rod passes through the through hole and is fixed with a nut.

4. The protection device for an electric tar precipitator according to claim 2, characterized in that: The first air blocking disc and the second air blocking disc are made of polytetrafluoroethylene, the first air plug and the second air plug are made of rubber, the insulating disc is made of plastic, the upper end of the suspension rod is provided with an external thread, the center of the insulating disc is provided with a through hole, and the upper end of the suspension rod passes through the through hole and is fixed with a nut.

5. The protection device for an electrostatic tar precipitator according to claim 3 or 4, characterized in that: A pressure sensor is arranged outside the inflation nozzle. The pressure sensor is electrically connected to a pressure alarm device. When the pressure is lower than the set value, an alarm signal is emitted.

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