Cathode frame of electrostatic dust collector

Abstract

The utility model discloses an electrostatic dust collector cathode frame which comprises a bottom positioning plate, the bottom positioning plate comprises a transverse part and inclined parts connected with the two ends of the transverse part, and the included angle between the transverse part and the inclined parts is 135 degrees; frame pipes are vertically arranged at the tops of the inclined parts at the two ends of the bottom positioning plate through lower square and rectangular pipes, and hanging brackets are arranged at the tops of the frame pipes through upper square and rectangular pipes. According to the utility model, the original frame is transformed, the part of the cathode frame, which is close to the wall of the ash collecting bin of the electrostatic dust collector, is broken, and the bottom positioning plate is arranged to be in a 135-degree slope shape, so that the distance between the corner of the bottom positioning plate of the cathode frame and the wall of the ash collecting bin is prolonged to 640mm from the original 240mm, and is prolonged by nearly three times; after the distance between the cathode frame and the wall of the ash collecting bin is prolonged, accumulated ash in the ash collecting bin is not easy to adhere to the wall of the ash collecting bin, so that the stable operation of the electrostatic dust collector is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of minerals and metallurgy, and particularly relates to a novel cathode frame of an electrostatic precipitator, which reduces the failure rate of the electrostatic precipitator by modifying the structure of the original cathode frame of the electrostatic precipitator. Background Technique

[0002] Since electrostatic dust removal is a kind of gas dust removal process, when the dust-containing gas passes through the high-voltage electrostatic field, it is ionized to generate cations and anions. The dust particles in the flue gas adsorb anions and carry negative charges, move towards the anode, and finally adsorb on the anode plate and deposit. At present, the single dust removal capacity of the existing conventional electrostatic precipitator is 67 m², which is mainly used for the flue gas dust removal of shaft furnaces (acidic oxidized pellets). However, during winter production, due to the cold weather in the north, the temperature is about -25°C, and the inlet flue gas temperature of the electrostatic precipitator will also decrease accordingly. Sometimes it even operates below the dew point temperature of the flue gas, resulting in a small part of the flue gas entering the electrostatic precipitator becoming condensed water, flowing towards the wall of the dust collection bin of the electrostatic precipitator, aggregating with the dust in the dust collection bin, generating wet materials with relatively high viscosity, and thus adhering to the wall of the dust collection bin and unable to be discharged normally. And the bottom of the existing cathode frame of the electrostatic precipitator is exactly located at the top of the dust collection bin. The distance between the two side walls of the dust collection bin and the edge corner of the cathode frame is 240 mm. When wet materials adhere to the wall of the dust collection bin, the distance between the dust collection bin and the cathode frame will gradually decrease. When the dust accumulates on the wall and comes into contact with the cathode frame, the electrostatic precipitator will have a short circuit and grounding fault between the anode and the cathode, resulting in the inability of the electrostatic precipitator to operate. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problem that long-term dust accumulation on the wall of the electrostatic precipitator will cause the dust collection bin to contact the existing cathode frame, resulting in a short circuit and grounding fault between the anode and the cathode of the electrostatic precipitator, and to provide a novel cathode frame of the electrostatic precipitator.

[0004] To achieve its purpose, the utility model adopts the following technical solutions:

[0005] A cathode frame of an electrostatic precipitator provided by the utility model includes a bottom positioning plate. The bottom positioning plate includes a horizontal part and inclined parts connected to both ends of the horizontal part. The included angle between the horizontal part and the inclined parts is 135°; frame tubes are vertically arranged at the tops of the inclined parts at both ends of the bottom positioning plate through lower square rectangular tubes, and hanging brackets are provided at the tops of the frame tubes through upper square rectangular tubes.

[0006] As a further improvement of the technical solution of the utility model, the tops of the inclined parts at both ends of the bottom positioning plate are fastened to the lower square rectangular tubes through bolts.

[0007] Furthermore, bolt holes are provided at the top ends of the inclined parts at both ends of the bottom positioning plate, and the bolts are inserted into the bolt holes to fasten the tops of the inclined parts at both ends of the bottom positioning plate to the lower square rectangular tubes.

[0008] Further, the distance between the junction of the horizontal part and the inclined part of the bottom positioning plate and the wall of the dust collection bin of the electrostatic precipitator is 640 mm.

[0009] By transforming the original frame of the present utility model, the cathode frame is cut off at the part close to the wall of the dust collection bin of the electrostatic precipitator, and the bottom positioning plate is set to be a slope with an angle of 135°, so that the distance between the corner of the bottom positioning plate of the cathode frame and the wall of the dust collection bin is extended from the original design of 240 mm to 640 mm, nearly tripled. After the distance between the cathode frame and the wall of the dust collection bin is extended, the dust accumulated in the dust collection bin is not easily adhered to the wall of the dust collection bin, thus ensuring the stable operation of the electrostatic precipitator. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the cathode frame of the new type of electrostatic precipitator;

[0011] Figure 2 is Figure 1 a schematic diagram of the bottom positioning plate in

[0012] Figure 3 is a schematic diagram after the installation of the cathode frame of the electrostatic precipitator of the utility model;

[0013] The meanings of the reference numerals are as follows: 1, bottom positioning plate; 2, bolt; 3, lower square rectangular tube; 4, frame tube; 5, upper square rectangular tube; 6, hanger; 7, wall of the dust collection bin; 8, bolt hole; 9, dust accumulated in the dust collection bin; 10, anode plate. Detailed Embodiment

[0014] The present utility model will be further described below with reference to the drawings.

[0015] Referring to Figure 1-2 , an electrostatic precipitator cathode frame provided by the present utility model includes a bottom positioning plate 1. The bottom positioning plate 1 includes a horizontal part and inclined parts connected to both ends of the horizontal part. The included angle between the horizontal part and the inclined parts is 135°; vertical frame tubes 4 are provided at the tops of the inclined parts at both ends of the bottom positioning plate 1 through lower square rectangular tubes 3, and hangers 6 are provided on the frame tubes 4 through upper square rectangular tubes 5;

[0016] Specifically, bolt holes 8 are provided at the tops of the inclined parts at both ends of the bottom positioning plate 1, and the bottom positioning plate 1 is fastened to the lower square rectangular tube 3 through M14 bolts 2 penetrating through the bolt holes 8 at the tops of both ends of the inclined parts.

[0017] Specifically, after the above improvement, the distance between the junction of the horizontal part and the inclined part of the bottom positioning plate 1 and the wall 7 of the dust collection bin of the electrostatic precipitator can reach 640 mm.

[0018] During the annual overhaul of the shaft furnace, the cathode frame of the electrostatic precipitator of the present utility model is installed in the ash collecting bin of the electrostatic precipitator, as Figure 3 shown. At the same time, the anode plate 10 is installed. After the modification, the distance between the corner of the bottom positioning plate 1 of the cathode frame and the wall 7 of the ash collecting bin has been expanded from 240 mm to 640 mm, nearly tripled. After the distance between the cathode frame and the wall 7 of the ash collecting bin is extended, the ash 9 in the ash collecting bin is not easily adhered to the wall 7 of the ash collecting bin, thus ensuring the stable operation of the electrostatic precipitator. In addition, after the modification, the secondary voltage of the electrostatic precipitator electric field has been increased from 40 - 45 kv to 50 - 55 kv, and the secondary current has been increased from 150 mA to 250 mA. The dust removal efficiency of the electrostatic precipitator has been increased by more than 20%. At the same time, the fault of the electric field short circuit caused by the short circuit of the anode and cathode during the winter production (from November to March of the next year) of the electrostatic precipitator can be completely solved.

Claims

1. An electrostatic precipitator cathode frame, characterized in that, It includes a bottom positioning plate (1). The bottom positioning plate (1) includes a horizontal part and inclined parts connected to both ends of the horizontal part. The included angle between the horizontal part and the inclined parts is 135°. Frame pipes (4) are vertically arranged at the tops of the inclined parts at both ends of the bottom positioning plate (1) through lower square rectangular pipes (3), and a hanger (6) is provided at the top of the frame pipes (4) through upper square rectangular pipes (5).

2. The cathode frame of an electrostatic precipitator according to claim 1, characterized in that, The tops of the inclined parts at both ends of the bottom positioning plate (1) are fastened to the lower square rectangular pipes (3) through bolts (2).

3. The cathode frame of an electrostatic precipitator according to claim 2, characterized in that, Bolt holes (8) are provided at the top ends of the inclined parts at both ends of the bottom positioning plate (1). The bolts (2) fasten the tops of the inclined parts at both ends of the bottom positioning plate (1) to the lower square rectangular pipes (3) by inserting into the bolt holes (8).

4. An electrostatic precipitator cathode frame according to any one of claims 1-3, characterized in that, The distance between the connection of the horizontal part and the inclined part of the bottom positioning plate (1) and the wall (7) of the dust collecting bin of the electrostatic precipitator is 640 mm.

Images