A cathode system for an electrostatic precipitator

Abstract

This invention belongs to the technical field of electrostatic precipitators and discloses a cathode system for an electrostatic precipitator, including an N-field cathode wire structure arranged along the flue gas flow direction inside the dust collector. The first-stage N-field cathode wire is a four-pointed curved-tooth integral tubular barbed wire. The final-stage N-field cathode wire is a combination of a two-pointed straight-tooth barbed wire and an auxiliary electrode. The remaining cathode wires are all four-pointed straight-tooth integral tubular barbed wires. This invention utilizes a combined cathode wire structure to better improve dust removal efficiency by addressing the dust characteristics of different electric fields. Furthermore, this invention reduces costs while improving dust removal efficiency. Simultaneously, this invention optimizes space utilization: within a limited electric field space, the combined electrode wires can maximize space utilization through reasonable layout, ensuring a sufficient number of corona wires without affecting the overall size of the equipment or installation difficulty.

Description

Technical Field

[0001] This invention belongs to the field of electrostatic precipitator technology, specifically a cathode system for an electrostatic precipitator. Background Technology

[0002] An electrostatic precipitator (ESP) is a highly efficient industrial waste gas purification device used to remove particulate matter from flue gas. It operates on the principle of electrostatic adsorption, in which the cathode wire (also known as the discharge wire or corona wire) plays a crucial role. The design and material of the cathode wire affect the effectiveness of the corona discharge. An ideal cathode wire should generate a high-intensity corona current, initiate corona discharge at a relatively low voltage, and maintain a stable corona current. For dust with different properties (such as resistivity), a suitable cathode wire design allows the ESP to better adapt to specific operating conditions, ensuring optimal dust removal efficiency.

[0003] The structure of the cathode wire directly determines the corona discharge effect. Conventional, uniform cathode wires are difficult to adapt to the dust conditions in different electric field segments, and cannot meet the needs of dust treatment with different humidity, viscosity, and resistivity. A single cathode wire is either prone to dust accumulation and pollution, leading to corona blockage, and the overall discharge stability drops significantly after local failure. Or it has a high corona initiation voltage and insufficient corona current, resulting in poor particle charging effect. Secondary dust is also very likely to occur in the final electric field, and the ability to capture high resistivity dust is weak. At the same time, the uniform cathode wire layout has low space utilization. If a sufficient number of corona wires is required, the equipment size can only be increased, the manufacturing cost can be increased, the installation and layout can be difficult, and the overall dust removal efficiency can hardly reach the ideal standard. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a cathode system for an electrostatic precipitator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cathode system for an electrostatic precipitator, comprising an N-field cathode wire structure arranged along the flue gas flow direction within the dust collector chamber, wherein the first-stage N-field cathode wire adopts a four-pointed curved tooth integral tubular barbed wire, the final-stage N-field cathode wire adopts a cathode wire composed of a two-pointed straight tooth barbed wire and an auxiliary electrode, and the remaining intermediate N-field cathode wires all adopt a four-pointed straight tooth integral tubular barbed wire.

[0006] As a preferred embodiment of the present invention, the N-field cathode wire structure is a five-level electric field cathode wire structure.

[0007] As a preferred embodiment of the present invention, the four-pointed curved tooth integral tubular barbed line includes a tube body a and a plurality of four-pointed curved tooth barbs disposed on the tube body a.

[0008] As a preferred embodiment of the present invention, the four-pointed curved toothed barb includes two curved pointed teeth that are curved to both sides in an arc shape at its top and two pointed teeth that are bent to both sides at 90° at its root.

[0009] As a preferred embodiment of the present invention, the four-pointed straight tooth integral tubular barbed line includes a tube body b and a plurality of four-pointed straight tooth barbs disposed on the tube body b.

[0010] As a preferred embodiment of the present invention, the four-pointed straight-toothed barb includes two straight-pointed teeth disposed at its top and two straight-pointed teeth disposed at its root.

[0011] As a preferred embodiment of the present invention, the four straight teeth of the four-pointed straight-toothed barb are located on the same plane.

[0012] As a preferred embodiment of the present invention, the two-pointed straight barb line includes a tube body c and a plurality of two-pointed straight barb blades disposed on the tube body c.

[0013] As a preferred embodiment of the present invention, the two-pointed straight barb includes two discharge straight points disposed on the same plane at its top.

[0014] The beneficial effects of this invention are as follows: This invention employs a tiered approach with different cathode wires based on flue gas flow direction. The first electric field uses a four-pointed curved-tooth tubular barbed wire, which has strong anti-fouling ability and maintains stable overall discharge even when local corona is blocked, making it suitable for high-humidity and sticky dust. The second to fourth electric fields use four-pointed straight-tooth tubular barbed wires, which have low corona initiation voltage and high corona current, making it difficult for dust to accumulate and allowing for stable charging of particles, avoiding corona blockage. The final fifth electric field is equipped with a two-pointed straight-tooth barbed wire and auxiliary electrodes, significantly reducing secondary dust emission and providing better collection of high resistivity dust. Through this tiered combination structure, the dust removal efficiency is significantly improved by specifically adapting to the dust characteristics of each electric field, while reducing the overall cost of the equipment. It also allows for the rational arrangement of electrodes within a limited space, without increasing equipment size or installation difficulty, resulting in higher space utilization. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the integral tubular barbed line with four pointed curved teeth of the present invention; Figure 3 This is a side view of the integral tubular barb line with four pointed curved teeth of the present invention; Figure 4 This is a front view of the integral tubular barb line with four pointed straight teeth of the present invention; Figure 5 This is a side view of the integral tubular barb line with four pointed straight teeth of the present invention; Figure 6 This is a front view of the two-pointed straight tooth barb line of the present invention; Figure 7 This is a side view of the two-pointed straight tooth barb line of the present invention; In the diagram: 1. Four-pointed curved teeth integral tubular barb line; 2. Four-pointed straight teeth integral tubular barb line; 3. Two-pointed straight teeth barb line. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, this embodiment of the invention provides a cathode system for an electrostatic precipitator, including an N-field cathode wire structure arranged along the flue gas flow direction inside the dust collector box. The first-stage cathode wire adopts a four-pointed curved tooth integral tubular barbed wire 1, the final-stage N-field cathode wire adopts a cathode wire combined with a two-pointed straight tooth barbed wire 3 and an auxiliary electrode, and the remaining intermediate cathode wires all adopt four-pointed straight tooth integral tubular barbed wire 2; the N-field cathode wire structure is a five-stage cathode wire structure.

[0018] This invention utilizes a combined cathode wire structure to improve dust removal efficiency, taking into account the dust characteristics of different electric fields. Simultaneously, the combined cathode wire reduces costs while increasing dust removal efficiency. Furthermore, this invention optimizes space utilization: within a limited electric field space, the combined cathode wires can maximize space utilization through reasonable layout, ensuring a sufficient number of corona wires without affecting the overall size of the equipment or installation difficulty.

[0019] like Figure 2-3 As shown, the four-pointed curved tooth integral tubular barb line 1 includes a tube body a and a number of four-pointed curved tooth barbs disposed on the tube body a; the four-pointed curved tooth barb includes two curved pointed teeth that are curved to both sides in an arc shape at the top and two pointed teeth that are bent to both sides at 90° at the root.

[0020] The four-pointed curved tooth integral tubular barbed wire with an electric field has better dustproof and anti-pollution capabilities, further improving these capabilities. Due to the curved structure of the four-pointed curved tooth barbed blades, when corona closure occurs in some areas, other unclosed parts can still continue to work normally, ensuring the stability of the overall corona discharge. For some dusts with specific physicochemical properties, such as dusts with high viscosity and high humidity, the curved tooth barbed wire may show better applicability and dust removal efficiency.

[0021] like Figure 4-5As shown, the four-pointed straight tooth integral tubular barb line 2 includes a tube body b and a number of four-pointed straight tooth barbs disposed on the tube body b; the four-pointed straight tooth barb includes two straight teeth disposed at its top and two straight teeth disposed at its root; the four straight teeth of the four-pointed straight tooth barb are on the same plane.

[0022] The four-pointed straight-tooth integral tubular barbed wire with two, three, and four electric fields enables it to initiate corona discharge at a lower voltage and provide a higher corona current, enhancing the charging effect of particulate matter. The four-pointed straight-tooth integral tubular barbed wire does not easily accumulate dust, and even if a small amount of dust adheres, it will not significantly affect its corona discharge performance, maintain good working condition, and reduce corona blockage problems caused by surface contamination.

[0023] like Figure 6-7 As shown, the two-pointed straight barb line 3 includes a tube body c and a plurality of two-pointed straight barb pieces disposed on the tube body c; the two-pointed straight barb pieces include two discharge straight points disposed on the same plane at their tops.

[0024] The design of the final stage five electric field using two-pointed straight tooth barbed wire + auxiliary electrode cathode wire can effectively reduce the possibility of dust already deposited on the anode plate being carried away by the airflow, reducing the phenomenon of "secondary dust". For high resistivity dust, the two-pointed straight tooth + auxiliary electrode can provide better working conditions and show better adaptability and collection effect.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cathode system for an electrostatic precipitator, comprising an N-field cathode wire structure arranged along the flue gas flow direction within a dust collector chamber, characterized in that, The first electric field cathode wire adopts a four-pointed curved tooth integral tubular barbed wire (1), the last stage N electric field cathode wire adopts a two-pointed straight tooth barbed wire (3) combined with an auxiliary electrode cathode wire, and the remaining electric field cathode wires in the middle adopt a four-pointed straight tooth integral tubular barbed wire (2).

2. The cathode system of an electrostatic precipitator according to claim 1, characterized in that: The N-field cathode wire structure is a five-level electric field cathode wire structure.

3. The cathode system of an electrostatic precipitator according to claim 1, characterized in that: The four-pointed curved tooth integral tubular barbed line (1) includes a tube body a and several four-pointed curved tooth barbs disposed on the tube body a.

4. The cathode system of an electrostatic precipitator according to claim 3, characterized in that: The four-pointed curved toothed barb includes two curved pointed teeth that are curved to both sides in an arc shape at its top and two pointed teeth that are bent to both sides at 90° at its root.

5. The cathode system of an electrostatic precipitator according to claim 1, characterized in that: The four-pointed straight tooth integral tubular barb line (2) includes a tube body b and several four-pointed straight tooth barbs disposed on the tube body b.

6. The cathode system of an electrostatic precipitator according to claim 5, characterized in that: The four-pointed straight-toothed barb includes two straight-pointed teeth at its top and two straight-pointed teeth at its root.

7. The cathode system of an electrostatic precipitator according to claim 6, characterized in that: The four straight teeth of the four-pointed straight-toothed barb are on the same plane.

8. The cathode system of an electrostatic precipitator according to claim 1, characterized in that: The two-pointed straight barb line (3) includes a tube body c and several two-pointed straight barb plates disposed on the tube body c.

9. The cathode system of an electrostatic precipitator according to claim 8, characterized in that: The two-pointed straight-tooth barb includes two discharge straight points on the same plane at its top.

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