Hot air blowing device for preventing dewing and creepage of insulating porcelain bushing of wet-type electric dust remover

Abstract

The utility model belongs to the field of wet-type electric dust removers, and particularly relates to a wet-type electric dust remover hot air purging insulation porcelain bushing dew formation and creepage prevention device which comprises an insulation box, a hollow bottom plate is installed at the bottom of the insulation box, and a through hot air inlet connecting pipe is installed on the side wall of the insulation box. The porcelain sleeve mechanism comprises a porcelain sleeve ring frame arranged at the opening of the bottom plate, and an insulating porcelain sleeve is arranged in an inner cavity of the porcelain sleeve ring frame; the twelve air inducing holes are formed in the quartz gland and distributed along the circumference, the lower portions of the air inducing holes are conical faces expanding outwards, when hot air is input into an inner cavity of the insulation box, a sweeping air curtain is formed when the hot air penetrates through the air inducing holes to enter the insulation porcelain sleeve, and multi-angle and high-flow-speed transmission ensures that the hot air acts on the interior of the insulation porcelain sleeve and a cathode hanging rod; and the drying of the cathode suspender of the insulation porcelain bushing 42 is ensured, so that the insulation porcelain bushing is not dewed or creepage in the operation process, the problem of operation faults of the insulation porcelain bushing can be effectively solved, and the normal operation of the wet-type electric dust remover and the up-to-standard emission of dust are ensured.

Description

Technical Field

[0001] The utility model relates to the field of wet electric precipitators, in particular to a hot air blowing device for preventing condensation and electric creepage of insulating porcelain sleeves of wet electric precipitators. Background Art

[0002] The wet electrostatic precipitator is a gas purification system that uses a strong electric field to separate solid and liquid suspended particles from the gas. A high voltage direct current is passed between the positive and negative electrodes to generate a strong electric field between the electrodes, which ionizes the surrounding gas and generates a large number of electrons and positive and negative ions. When the dusty flue gas and water mist enter the electric field, the dust and fine droplets will be charged at a very fast speed under the action of these electrons and ions, and will quickly tend to the electrode with the opposite polarity under the action of the electric field force, and finally release the charge and adsorb on the electrode. Due to the water mist generated by the wet flue gas desulfurization process, the dust is condensed and humidified. The dust and water mist are charged in the electric field and collected together. The water mist forms a water film on the dust collecting plate, which keeps the plate clean. The spray cleaning device sprays water mist with a certain pressure onto the electrode surface, accelerating the dust droplets to flow down along the surface of the positive and negative electrodes into the ash hopper, and finally discharged into the sedimentation tank, while the purified gas is discharged into the atmosphere through the outlet.

[0003] The cathode hanging system of the wet electrostatic precipitator includes an insulating box, an insulating porcelain sleeve, a sealing device, a hot air blowing device, a cathode hanger, etc. The function of the insulating porcelain sleeve is to isolate the cathode system from the steel body of the wet electrostatic precipitator, isolate the high-voltage live equipment, and ensure the safety and stability of the electrical equipment.

[0004] The prior art has the following problems:

[0005] During the operation of the wet electrostatic precipitator, the insulating porcelain sleeve must be equipped with a hot air blowing device inside the insulating box to prevent condensation, creepage, and electric field short circuit. The hot air is introduced from the upper part of the insulating box and blows the inside of the insulating porcelain sleeve along the holes on the quartz cover of the insulating box to ensure the dryness of the inside of the porcelain sleeve and the cathode hanger. The existing quartz cover of the insulating box has two large elliptical holes with a very low flow rate in the holes. The drying effect inside the quartz cover is poor, and the porcelain sleeve often condenses and creeps, resulting in electric field discharge and the failure of the secondary voltage to rise, which affects the emission of dust in the flue gas. Therefore, the condensation and creepage problems of the insulating box porcelain sleeve need to be solved urgently. Utility Model Content

[0006] (I) Purpose of the utility model

[0007] In order to solve the technical problems existing in the background technology, the utility model proposes a hot air blowing device for preventing condensation and electric creepage of insulating porcelain sleeves of wet electrostatic precipitator, which has the characteristics of no condensation and no electric creepage on the insulating porcelain sleeves during operation.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the utility model provides a wet electrostatic precipitator hot air blowing device to prevent condensation and creepage of insulating porcelain sleeves, comprising an insulating box, a hollow bottom plate is installed at the bottom of the insulating box, and a through hot air inlet pipe is installed on the side wall;

[0010] The porcelain sleeve mechanism comprises a porcelain sleeve ring frame arranged at the opening of the bottom plate, an insulating porcelain sleeve is arranged in the inner cavity of the porcelain sleeve ring frame, a quartz pressure cover is arranged on the upper part of the insulating porcelain sleeve, and a plurality of through air induction holes are arranged in an array on the quartz pressure cover;

[0011] A cathode suspension rod is passed through the middle of the quartz pressure cover, and a locking bolt group is sleeved on the outer wall of one end of the cathode suspension rod passing through the quartz pressure cover.

[0012] Preferably, the upper portion of the air vent is a "cylindrical" structure, and the lower portion is a "cone-shaped" structure, and the cone angle is 30°-40°.

[0013] Preferably, twelve air vents are arranged in an array on the quartz pressure cover.

[0014] Preferably, a sealing member is provided in the clamping gap between the porcelain sleeve ring frame and the insulating porcelain sleeve.

[0015] Preferably, a hollow dust cover is connected to the lower portion of the insulating porcelain sleeve, and the dust cover is sleeved on the outer periphery of the cathode suspension rod.

[0016] The above-mentioned technical scheme of the utility model has the following beneficial technical effects: twelve air ducting holes are opened on the quartz pressure cover, the air ducting holes are distributed along the circumference, and the lower part is an outward-expanding cone surface. When hot air is input into the inner cavity of the insulation box, it passes through the air ducting holes and enters the inside of the insulating porcelain sleeve to form a cleaning wind curtain. The multi-angle and high-speed transmission ensures that the hot air acts on the inside of the insulating porcelain sleeve and the cathode hanger, and ensures the drying of the cathode hanger of the insulating porcelain sleeve, so that the insulating porcelain sleeve will not condense or creep during operation, which can effectively solve the problem of operating failure of the insulating porcelain sleeve and ensure the normal operation of the wet electrostatic precipitator and the dust emission that meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the planar structure of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the matching structure of the insulating porcelain sleeve and the dust cover.

[0021] Reference numerals:

[0022] 1. Insulation box; 2. Bottom plate; 3. Hot air inlet pipe; 41. Porcelain sleeve ring frame; 42. Insulating porcelain sleeve; 43. Sealing element; 44. Quartz gland; 45. Air vent; 46. Lock bolt assembly; 5. Cathode suspension rod; 6. Dust cover. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0024] like Figure 1-4 As shown, the utility model proposes a wet electrostatic precipitator hot air blowing device to prevent condensation and creepage of insulating porcelain sleeves, comprising an insulating box 1, a hollow bottom plate 2 is installed at the bottom of the insulating box 1, and a through hot air inlet pipe 3 is installed on the side wall;

[0025] The porcelain sleeve mechanism comprises a porcelain sleeve ring frame 41 arranged at the opening of the bottom plate 2, an insulating porcelain sleeve 42 is arranged in the inner cavity of the porcelain sleeve ring frame 41, a quartz pressure cover 44 is arranged on the upper part of the insulating porcelain sleeve 42, and a plurality of through air induction holes 45 are arranged in an array on the quartz pressure cover 44;

[0026] A cathode suspension rod 5 penetrates the middle of the quartz pressure cover 44 , and a locking bolt assembly 46 is sleeved on the outer wall of one end of the cathode suspension rod 5 that penetrates the quartz pressure cover 44 .

[0027] It should be noted that:

[0028] 1. The upper part of the air induction hole 45 is a "cylindrical" structure for guiding hot air, and the lower part is a "cone" structure with a cone angle of 30°-40°. The outwardly inclined structure can diffuse the hot air outward.

[0029] 2. Twelve air induction holes 45 are arranged in an array on the quartz pressure cover 44; the twelve air induction holes 45 convey hot air to the inner cavity of the insulating porcelain sleeve 42 at different angles.

[0030] In this embodiment, twelve air inlet holes 45 are provided on the quartz pressure cover 44. The air inlet holes 45 are distributed along the circumference, and the lower part thereof is an outwardly expanding cone. When the hot air is input into the inner cavity of the insulating box 1 through the hot air inlet pipe 3, since the air inlet holes 45 are the only passage leading to the inner cavity of the insulating porcelain sleeve 42, the hot air passes through the air inlet holes 45 into the insulating porcelain sleeve 42 to form a cleaning wind curtain. The multi-angle and high-speed transmission ensures that the hot air acts on the inside of the insulating porcelain sleeve 42 and the cathode hanger 5, ensuring that the insulating porcelain sleeve 42 and the cathode hanger 5 are dry, so that the insulating porcelain sleeve 42 does not condense and creep during operation, which can effectively solve the problem of operating failure of the insulating porcelain sleeve 42 and ensure the normal operation of the wet electrostatic precipitator and the dust emission that meets the standards.

[0031] It should be added that the amount of hot air inputted into the inner cavity of the insulating box 1 through the hot air inlet pipe 3 should ensure that the flow velocity through the air duct 45 is not less than 20m / s, and the hot air temperature is not less than 80°C, so as to ensure that the hot air forms a cleaning air curtain inside the insulating porcelain sleeve.

[0032] In order to seal the lower part of the insulating porcelain sleeve 42 , further, a sealing member 43 is laid in the clamping gap between the porcelain sleeve ring frame 41 and the insulating porcelain sleeve 42 , and the sealing member 43 includes a gasket and a sealing strip.

[0033] It is understandable that a seal is also provided in the connection gap between the insulating porcelain sleeve 42 and the quartz pressure cover 44 to ensure that only the air inlet 45 is left between the insulating porcelain sleeve 42 and the insulating box 1 as a hot air transmission channel.

[0034] In order to prevent dust from entering the inner cavity of the insulating porcelain sleeve 42 , further, a hollow dust cover 6 is connected to the lower part of the insulating porcelain sleeve 42 , and the dust cover 6 is sleeved on the outer periphery of the cathode suspension rod 5 .

[0035] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A hot air purge device for wet electrostatic precipitator to prevent condensation and creepage of insulating porcelain sleeves, characterized in that: It comprises an insulating box (1), wherein a hollow bottom plate (2) is installed at the bottom of the insulating box (1), and a through hot air inlet pipe (3) is installed on the side wall; The porcelain sleeve mechanism comprises a porcelain sleeve ring frame (41) arranged at the opening of the base plate (2), an insulating porcelain sleeve (42) is arranged in the inner cavity of the porcelain sleeve ring frame (41), a quartz pressure cover (44) is arranged on the upper part of the insulating porcelain sleeve (42), and a plurality of through-going air induction holes (45) are arranged in an array on the quartz pressure cover (44); A cathode suspension rod (5) passes through the middle of the quartz pressure cover (44), and a locking bolt group (46) is sleeved on the outer wall of one end of the cathode suspension rod (5) passing through the quartz pressure cover (44).

2. A hot air purge device for preventing condensation and creepage of insulating porcelain sleeves in a wet electrostatic precipitator according to claim 1, characterized in that: The air induction hole (45) has a "cylindrical" structure at the top and a "cone" structure at the bottom, and the cone angle is 30°-40°.

3. A hot air purge device for preventing condensation and creepage of insulating porcelain sleeves in a wet electrostatic precipitator according to claim 1, characterized in that: Twelve air induction holes (45) are arranged in an array on the quartz pressure cover (44).

4. A hot air purge device for preventing condensation and creepage of insulating porcelain sleeves in a wet electrostatic precipitator according to claim 1, characterized in that: A sealing member (43) is provided in the clamping gap between the porcelain sleeve ring frame (41) and the insulating porcelain sleeve (42).

5. A hot air purge device for preventing condensation and creepage of insulating porcelain sleeves in a wet electrostatic precipitator according to claim 1, characterized in that: The lower part of the insulating porcelain sleeve (42) is connected to a hollow dust cover (6), and the dust cover (6) is sleeved on the outer circumference of the cathode suspension rod (5).

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