Positive pressure shielding system for high-temperature electric dust collector

Abstract

The utility model provides a positive pressure shielding system for a high-temperature electric dust collector, which comprises an air supply fan, a heating box is arranged at the side part of the air supply fan, the heating box and the air supply fan are communicated through a cold air conveying header pipe, a hot air conveying header pipe is arranged at the other side of the heating box, an insulating porcelain bushing heat preservation box is arranged at the side part of the hot air conveying header pipe, and the insulating porcelain bushing heat preservation box is communicated with the hot air conveying header pipe. The insulation porcelain sleeve heat preservation box and the insulation porcelain sleeve heat preservation box are communicated through a hot air conveying branch pipe, an insulation porcelain sleeve is arranged in the insulation porcelain sleeve heat preservation box, an air curtain ring pressure-bearing cover is arranged below the insulation porcelain sleeve, a positive pressure air curtain ring is arranged on the inner wall of the air curtain ring pressure-bearing cover, and a shielding cylinder is arranged at the bottom of the air curtain ring pressure-bearing cover. The positive-pressure hot air curtain is manufactured at the bottom of the insulating porcelain bushing of the electric dust collector, dust entering the insulating porcelain bushing is shielded, the cleanness, dryness and insulating performance of the insulating porcelain bushing are guaranteed, operation is easy, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of smelting high-temperature electric precipitators and relates to a positive pressure shielding system for high-temperature electric precipitators. Background Art

[0002] The working principle of the electrostatic precipitator is to use a high-voltage electric field to ionize the flue gas. The dust in the flue gas is charged with positive and negative ions. Under the action of the electric field force, the dust with negative ions is adsorbed on the anode plate, and the dust with negative ions is adsorbed on the cathode line, and then vibrated into the ash hopper through the vibrating device. The cathode hanging insulating porcelain sleeve of the electrostatic precipitator is also called the pressure-bearing insulator. The pressure-bearing insulator is mainly used to bear the mechanical load in the system, provide support and fixation for the electric field cathode system, and isolate the high-voltage electric field inside the electrostatic precipitator through its insulation performance to avoid the electric field from being grounded. Once the insulation performance of the insulating porcelain sleeve is damaged, the insulation of the entire electric field will decrease, and eventually the secondary voltage of the electric field will decrease. When the dust is seriously contaminated, it will cause difficulty in power transmission in the electric field. After forced power transmission, the surface of the insulating porcelain sleeve will frequently creep and locally overheat until it breaks down and breaks, causing the entire cathode frame to collapse and the electric field to be grounded. Utility Model Content

[0003] The utility model aims to provide a positive pressure shielding system for a high-temperature electric precipitator in view of the problems existing in the prior art, thereby solving the problem that the performance of the insulator of the prior electric precipitator is easily damaged during use.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A positive pressure shielding system for a high-temperature electrostatic precipitator comprises an air supply fan, a heating box is provided on the side of the air supply fan, and the two are connected through a cold air delivery main pipe, a hot air delivery main pipe is provided on the other side of the heating box, an insulating porcelain sleeve heat preservation box is provided on the side of the hot air delivery main pipe, and the two are connected through a hot air delivery branch pipe, an insulating porcelain sleeve heat preservation box is provided inside the insulating porcelain sleeve, a wind curtain ring pressure cover is provided below the insulating porcelain sleeve, a positive pressure wind curtain ring is provided on the inner wall of the wind curtain ring pressure cover, and a shielding cylinder is provided on the bottom.

[0006] Furthermore, the cold air delivery main pipe is provided with an electric flow regulating valve.

[0007] Furthermore, a plurality of spiral scale heating tubes arranged vertically are provided inside the heating box.

[0008] Furthermore, the hot air conveying main pipe is provided with a thermocouple.

[0009] Furthermore, a plurality of air outlet holes are evenly arranged on the inner side of the positive pressure air curtain ring, the diameter of the air outlet holes is 10 mm, and the air outlet holes are inclined downward by 35°.

[0010] Furthermore, the spiral scale heating tube is Ω-shaped.

[0011] Furthermore, the air curtain ring pressure cover is an L-shaped circular ring structure.

[0012] The beneficial effects of the utility model are:

[0013] The utility model can shield dust entering the insulating porcelain sleeve by manufacturing a positive-pressure hot air curtain at the bottom of the insulating porcelain sleeve of the electric precipitator, thereby ensuring the cleanliness, dryness and insulation performance of the insulating porcelain sleeve, thereby ensuring the operating efficiency of the electric precipitator, and is easy to operate and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 This is a schematic structural diagram of the air curtain ring pressure cover of the utility model;

[0016] Figure 3 It is a schematic diagram of the connection relationship between the air curtain ring pressure cover and the positive pressure air curtain ring of the utility model.

[0017] In the figure, 1-air supply fan, 2-electric flow control valve, 3-cold air delivery main pipe, 4-spiral scale heating pipe, 5-heating box, 6-thermocouple, 7-hot air delivery main pipe, 8-hot air delivery branch pipe, 9-insulating porcelain sleeve insulation box, 10-insulating porcelain sleeve, 11-positive pressure air curtain ring, 12-air curtain ring pressure cover, 13-shielding tube. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is described below in conjunction with the accompanying drawings and implementation methods.

[0019] like Figure 1 As shown, a positive pressure shielding system for a high-temperature electrostatic precipitator includes an air supply fan 1. A heating box 5 is provided on the side of the air supply fan 1, and the two are connected through a cold air delivery main pipe 3. The cold air delivery main pipe 3 is provided with an electric flow regulating valve 2. The purpose of setting the electric flow regulating valve 2 is to adjust the air volume.

[0020] A plurality of spiral scale heating tubes 4 arranged vertically are provided inside the heating box 5. Specifically, the spiral scale heating tubes 4 are Ω-shaped; specifically, the spiral scale heating tubes 4 heat the cold air by increasing the heat dissipation area through the scales.

[0021] A hot air delivery main pipe 7 is provided on the other side of the heating box 5, and a thermocouple 6 is provided on the hot air delivery main pipe 7. The thermocouple 6 is used to monitor the hot air temperature; an insulating porcelain sleeve insulation box 9 is provided on the side of the hot air delivery main pipe 7, and the two are connected through a hot air delivery branch pipe 8. An insulating porcelain sleeve insulation box 9 is provided with an insulating porcelain sleeve 10 inside, and an air curtain ring pressure cover 12 is provided below the insulating porcelain sleeve 10. The inner wall of the air curtain ring pressure cover 12 is provided with a positive pressure air curtain ring 11, and a shielding tube 13 is provided at the bottom.

[0022] Specifically, a plurality of air outlet holes are evenly arranged on the inner side of the positive pressure air curtain ring 11, the air outlet holes have an aperture of 10 mm, and the air outlet holes are inclined downward by 35°; Figure 2 and 3 As shown, the air curtain ring pressure cover 12 is an L-shaped circular ring structure.

[0023] The use process of this utility model is as follows:

[0024] First, the air supply fan 1 and the heating box 5 are installed on the outer top cover at the top of the electrostatic precipitator, and the two are connected through the cold air delivery main pipe 3 to deliver the cold air to the heating box; secondly, the heating box 5 is connected with the positive pressure air curtain ring 11 through the hot air delivery main pipe 7 and the hot air delivery branch pipe 8 to deliver the hot air to the positive pressure air curtain ring 11; the positive pressure air curtain ring 11 is installed just above the cathode hanging pipe wall hole in the insulating porcelain sleeve insulation box 9, and 40 φ10mm air outlet holes are arranged at the bottom, and the ejected hot air just forms a positive pressure air curtain at the cathode hanging pipe wall hole; a wind curtain ring pressure cover 12 is installed on the top of the positive pressure wind curtain ring 11 to protect the positive pressure wind curtain ring, and the insulating porcelain sleeve 10 is installed on the wind curtain ring pressure cover 12, and a shielding tube 13 is installed below the cathode hanging pipe wall hole at the bottom of the positive pressure wind curtain ring 11 to block the lateral airflow inside the electrostatic precipitator.

Claims

1. A positive pressure shielding system for a high temperature electric precipitator, characterized in that: The invention comprises an air supply fan (1), wherein a heating box (5) is provided on the side of the air supply fan (1), and the two are connected via a cold air delivery main pipe (3); a hot air delivery main pipe (7) is provided on the other side of the heating box (5); an insulating porcelain sleeve heat preservation box (9) is provided on the side of the hot air delivery main pipe (7), and the two are connected via a hot air delivery branch pipe (8); an insulating porcelain sleeve heat preservation box (9) is provided inside the insulating porcelain sleeve heat preservation box (9); an air curtain ring pressure cover (12) is provided below the insulating porcelain sleeve (10); a positive pressure air curtain ring (11) is provided on the inner wall of the air curtain ring pressure cover (12), and a shielding cylinder (13) is provided at the bottom.

2. A positive pressure shielding system for a high temperature electrostatic precipitator according to claim 1, characterized in that: The cold air delivery main pipe (3) is provided with an electric flow regulating valve (2).

3. A positive pressure shielding system for a high temperature electric precipitator according to claim 1, characterized in that: A plurality of spiral scale heating tubes (4) arranged vertically are provided inside the heating box (5).

4. A positive pressure shielding system for a high temperature electric precipitator according to claim 1, characterized in that: The hot air conveying main pipe (7) is provided with a thermocouple (6).

5. A positive pressure shielding system for a high temperature electric precipitator according to claim 1, characterized in that: A plurality of air outlet holes are evenly distributed on the inner side of the positive pressure air curtain ring (11), the air outlet holes have a diameter of 10 mm, and are inclined downward at 35 degrees.

6. A positive pressure shielding system for a high temperature electric precipitator according to claim 3, characterized in that: The spiral scale heating tube (4) is Ω-shaped.

7. A positive pressure shielding system for a high temperature electric precipitator according to claim 1, characterized in that: The air curtain ring pressure cover (12) is an L-shaped circular ring structure.

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