A dust collecting cathode wire for electrostatic precipitator

Abstract

The present invention discloses a dust collecting cathode wire of an electrostatic precipitator, which is composed of a discharge thorn 1, a frame 2, a dust collecting body 3, and an ash falling chamber 4. The purpose is to break through the limitations of the cathode wire functions of a traditional electrostatic precipitator. In addition to retaining the basic discharge function of the traditional cathode wire, the new cathode wire also has a large specific surface area and does not generate secondary dust when vibrated, so that the three functions of discharge, dust collection, and no dust are organically combined on the new cathode wire, which has the characteristics of large specific surface area, high discharge intensity, uniform corona, etc. The dust collecting area of ​​the dust collecting cathode wire can be equivalent to the dust collecting area of ​​the anode plate, and each dust collecting cathode wire is equivalent to the dust collecting area of ​​an anode plate.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic precipitator equipment for purifying industrial furnace smoke, and in particular to a cathode wire, a core component of an electrostatic precipitator. Background Art

[0002] At present, the known cathode wires of electrostatic precipitators include BS type, RS type, herringbone needle type, spiral type, star type, etc. These cathode wires are connected to a negative high-voltage power supply. Their core function is corona discharge to ionize the flue gas to generate free electrons (negative charge) and positive charge (protons). The negatively charged dust moves toward the anode plate under the action of the electric field force and is adsorbed by the anode plate, while the positively charged dust should move toward the cathode and be adsorbed by the cathode. However, since the core function of the known cathode wire is to release free electrons and the surface area is small, the dust collection function is negligible. The cathode dust caused by corona discharge and vibration causes the positively charged dust to collide and neutralize with the negatively charged dust when it is dispersed in the flue gas, resulting in waste of power supply energy for the electrostatic precipitator and limited dust collection function.

[0003] The commonly known formula for calculating the dust removal efficiency of an electrostatic precipitator is: 〖〖η=1-e〗_^(-Aω / Q)〗^where η is the dust removal efficiency (in %), A is the dust collection area (in m 2 ), ω is the dust approaching speed (in m 3 / m 2 / s), Q is the flue gas volume (in m 3 / s), it can be seen that the dust collecting area of ​​the electrostatic precipitator is one of the key parameters that determine the dust removal efficiency of the electrostatic precipitator. Expanding the dust collecting area of ​​the traditional electrostatic precipitator is one of the effective technical measures. The well-known dust collecting area refers to the dust collecting area of ​​the anode plate, and the well-known cathode dust collecting area is negligible.

[0004] In the well-known technical field of electrostatic precipitator, when the cathode rapping system fails, the cathode wire will be covered with dust, which fully demonstrates the objective existence of cathode dust collection. The cathode wire serves as a discharge electrode and not as a dust collecting electrode. The dust collecting area of ​​the electrostatic precipitator is calculated based on the projection area of ​​the anode plate. Although the cathode wire also has a limited surface, it is negligible.

[0005] The present invention studies a cathode wire with a large specific surface area, which does not affect the discharge function of the traditional cathode wire and does not generate secondary dust after vibration. It becomes an ideal product in this field and is also a demand for realizing the functional upgrade of the electrostatic precipitator. It is a cost-effective technical measure for improving the efficiency of the traditional electrostatic precipitator. Summary of the invention

[0006] The purpose of the present invention is to break through the limitations of the cathode line functions of traditional electrostatic precipitators. In addition to retaining the basic discharge function of traditional cathode lines, the new cathode line also has a large specific surface area and does not generate secondary dust when vibrated, so that the three functions of discharge, dust collection and no dust are organically combined in the new cathode line. It also has the characteristics of large dust collection area, high discharge intensity and uniform corona.

[0007] The beneficial effects of the enhanced cathode dust collection function of the present invention also include: relative to the known electrostatic precipitator, the new cathode dust collection area can reach more than half of the anode dust collection area, and the capacity of the electrostatic precipitator can be increased by replacing the new cathode wire involved in the present invention without changing the traditional electrostatic precipitator shell.

[0008] The present invention provides a novel dust-collecting and dust-free cathode wire, which can be used in conjunction with the cathode of a known electrostatic precipitator to make up for the deficiency of cathode dust collection, so that the cathode wire of the original structure is responsible for discharge, and the cathode wire of the present invention is newly added to be responsible for dust collection, thereby strengthening the collection of positively charged dust.

[0009] The dust-collecting cathode wire of the present invention can also completely replace the traditional cathode wires, so that the functions of discharge, dust collection and vibration without dust emission can be centrally optimized.

[0010] The dust collecting cathode wire of the present invention can be used in a dry electrostatic precipitator or a wet electrostatic precipitator according to different materials.

[0011] The utility model discloses a dust collecting cathode wire of an electrostatic precipitator, which comprises four parts, namely, a discharge thorn, a dust collecting body, a frame and a dust dropping cavity.

[0012] The discharge tip can be punched integrally with the dust collecting body, and further the discharge tip can be a customized sharp tip welded on the dust collecting body.

[0013] The dust collecting body is composed of two pieces that are punched out with holes with inclined louvers, and then rolled into a C-shaped structural wire body by special equipment. The two dust collecting bodies are then combined together to couple an internal ash falling chamber. Under the action of the electric field force, the positively charged dust gathers on the inclined louver surface. Under the action of the cathode vibration, the dust slides along the inclined surface of the louver into the ash falling chamber. Since there is no horizontal airflow in the ash falling chamber, the falling dust is not affected by the flue gas flow, thereby achieving cathode vibration cleaning without generating dust.

[0014] The skeleton is a flat steel with a certain thickness. A further optimized skeleton may be a square tube or a round tube, or may be the dust collecting body itself.

[0015] The further optimized discharge tip, dust collecting body and frame can be a whole, rolled into a single piece by special equipment, and two pieces are coupled and welded into a whole.

[0016] The cross section of the discharge burr welded on the dust collecting body is made up of 4 multi-tooth discharge burrs, and the tooth shape, number of teeth, and spacing between teeth are customized according to the characteristics of the smoke.

[0017] For further optimization, the thorn type with appropriate discharge intensity can be configured according to the dust resistivity, dust concentration, charging characteristics, etc., including but not limited to: thorn length, number of thorns, sharpness of thorn tips, length of upper and lower adjacent intervals, etc.

[0018] For further optimization, the discharge thorn 1 can be single or punched in one piece using a steel strip.

[0019] The effective length of the dust collecting cathode wire of the present invention is the same as that of the electrode plate, and the width is about 1 / 2 of that of the anode plate. The cathode dust collecting area of ​​one cathode wire is equivalent to the dust collecting area of ​​one anode plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The front view of the structural schematic diagram of the present invention.

[0021] Figure 2 A top view of the structural schematic diagram of the present invention.

[0022] In the figure: 1 discharge thorn, 2 frame, 3 dust collecting body, 4 ash falling chamber. DETAILED DESCRIPTION

[0023] A dust collecting cathode wire of an electrostatic precipitator is composed of a discharge thorn 1, a frame 2, a dust collecting body 3 and a dust falling cavity 4.

[0024] The discharge spike 1 in the figure is punched out by a special mold and can be a single body or a connected structure, which is welded to the dust collecting body 3.

[0025] The skeleton 2 in the figure is a round tube, and can also be a square tube or a steel plate. Its function is to act as a skeleton and be connected to the upper and lower cathode frames. There is a round hole at each end of the skeleton for assembling connecting bolts.

[0026] The dust collecting body 3 in the figure is punched and rolled into shape by special equipment. The dust collecting body 3 is a transparent structure. The air holes are diamond, triangle or other shapes. The stems between the holes have a certain width and slope. Each cathode line is composed of two dust collecting bodies welded together in a mirror image.

[0027] Two dust collecting bodies 3 form an ash falling chamber 4. There is no horizontal airflow in the ash falling chamber 4, and the dust entering the chamber will not be taken away by the airflow. Under the action of gravity and electric field force, the dust can only flow from top to bottom in the chamber, thereby realizing dust-free cleaning.

[0028] The dust collecting body 3 and the frame 2 are welded and assembled into a whole. The dust collecting area of ​​the assembled dust collecting cathode line can be equivalent to the dust collecting area of ​​the anode plate, and each one is equivalent to the dust collecting area of ​​one anode plate.

[0029] When the dust collecting cathode wire of the present invention is installed, the long axis center line of the dust collecting body 3 is parallel to the anode plate of the electrostatic precipitator, and the cathode wire is arranged parallel to the airflow direction, which does not increase resistance and does not occupy the maintenance channel.

[0030] Furthermore, according to different flue gas characteristics, such as corrosiveness, corrosion-resistant materials need to be used specifically.

[0031] Furthermore, when replacing the known cathode wire, it is necessary to check the strength of the original cathode frame, suspension, etc.

[0032] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A dust collecting cathode wire for an electrostatic precipitator, which not only has the discharge function of a traditional cathode wire, but also has the ability to collect positively charged dust and does not generate dust when it is vibrated and cleaned. It is characterized by: The invention comprises a discharge thorn (1), a frame (2), a dust collecting body (3), and an ash falling chamber (4). The dust collecting body (3) is first punched to form a hole with inclined louvers, and then rolled into a "C"-shaped structural wire body by special equipment. Then, two dust collecting bodies are combined together to couple an internal ash falling chamber (4). Under the action of the electric field force, positively charged dust is gathered on the inclined surface of the louvers. Under the action of cathode vibration, the dust slides along the inclined surface of the louvers into the ash falling chamber (4). Since there is no airflow in the ash falling chamber (4), the falling dust is not affected by the flue gas flow, and no cathode dust is generated when the ash is cleaned by vibration.

2. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that the discharge The thorn (1) is punched out by a special mold, designed as a single body or a conjoined structure, and welded to the dust collecting body (3).

3. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that The frame (2) is a round tube, a square tube or a steel plate, and its function is to act as a frame and to be connected to the upper and lower cathode frames. There is a round hole at each end of the frame for assembling a connecting bolt.

4. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that The dust collecting body (3) is punched and rolled by special equipment. The dust collecting body (3) is a permeable structure. The air holes are rhombus-shaped or triangular-shaped. The stems between the holes have a certain width and slope. Each cathode line is composed of two dust collecting bodies welded together in mirror image.

5. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that The two dust collecting bodies (3) form an ash dropping chamber (4), and there is no airflow in the ash dropping chamber (4) in the horizontal direction, so that dust entering the chamber will not be carried away by the airflow. Under the action of gravity and electric field force, the dust can only flow from top to bottom in the chamber, thereby achieving dust cleaning without raising dust.

6. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that The dust collecting body (3) and the frame (2) are welded together to form a whole. The dust collecting area of ​​the assembled dust collecting cathode wire is equivalent to the dust collecting area of ​​the anode plate. Each dust collecting cathode wire is equivalent to the dust collecting area of ​​an anode plate.

7. The dust collecting cathode wire of an electrostatic precipitator according to claim 1, characterized in that When the dust collecting cathode wire of the present invention is installed, the long axis center line of the dust collecting body (3) is parallel to the anode plate of the electrostatic precipitator, and the cathode wire is arranged parallel to the airflow direction, which does not increase resistance and does not occupy the maintenance channel.

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