Composite anode plate

Abstract

This utility model discloses a composite anode plate, including a substrate, a composite layer and an edge banding. The composite layer is arranged on at least one side of the substrate through the edge banding. A cavity that can temporarily contain dust is separated between the substrate and the composite layer. A plurality of through holes are provided on the composite layer to connect the outside world and the cavity, which can prevent secondary dust generation.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal, and in particular to the technical field of electrostatic precipitator anode plates. Background Technology

[0002] The anode plate, also called the dust collecting electrode or sedimentation electrode, is one of the core components of an electrostatic precipitator. Its main function is to collect dust. During operation, the electrostatic precipitator applies tens of thousands of volts of high-voltage direct current between the cathode wire and the anode plate to form a strong non-uniform electrostatic field. This causes corona discharge near the cathode wire and ionizes the surrounding gas molecules (i.e., generates a large number of free electrons and positive and negative ions). When dust-laden flue gas passes through this electric field, dust particles collide with and capture these ions, thus becoming charged. The negatively charged dust particles are driven by the electric field force under the influence of the high-voltage electrostatic field, moving towards the electrode with the opposite polarity (i.e., the positively charged anode plate). When the negatively charged dust particles reach the surface of the anode plate, they release their charge (neutralize) and are deposited and adsorbed on the surface of the anode plate under the action of electrostatic force and van der Waals force.

[0003] As a key dust collection component, the structural design of the anode plate directly affects the dust removal efficiency and dust cleaning effect. In the existing technology, the anode plates used in electrostatic precipitators are mostly single-plate structures, such as the metal anode plate and electrostatic precipitator with announcement number CN209646736U.

[0004] While this design can increase the dust collection area and improve dust adsorption capacity to some extent, it has significant drawbacks in the dust removal process. Specifically, when mechanical vibration or other dust removal methods are used, the dust adhering to the anode plate surface will fall off due to vibration. Since traditional anode plates are just a single plate and lack an effective interception structure, the fallen dust can easily escape under the airflow, leading to secondary dust generation. Secondary dust generation not only causes the collected dust to re-enter the airflow circulation, reducing the actual dust removal efficiency of the electrostatic precipitator, but also increases the burden on subsequent processing steps and may even cause additional wear on internal components, affecting overall operational stability. Furthermore, with increasingly stringent environmental protection requirements, higher standards have been set for the dust removal efficiency and dust emission concentration of electrostatic precipitators. Therefore, developing an anode plate that can effectively reduce dust escape during the dust removal process and suppress secondary dust generation is of significant practical importance for improving the performance of electrostatic precipitators and reducing dust emissions. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a composite anode plate that can prevent secondary dust generation.

[0006] To achieve the above objectives, this utility model proposes a composite anode plate, comprising a substrate, a composite layer, and an edge banding. The composite layer is arranged on at least one side of the substrate via the edge banding. A cavity for temporarily accommodating dust is provided between the substrate and the composite layer. A plurality of through holes communicating with the outside world and the cavity are provided on the composite layer.

[0007] Preferably, at least one end of the substrate is bent to form a dust collection groove.

[0008] Preferably, the surface of the substrate is provided with a concave-convex portion consisting of a plurality of grooves and / or protrusions.

[0009] Preferably, the substrate is further provided with a suspension mechanism consisting of several positioning holes and / or hooks.

[0010] Preferably, the edging is C-shaped and can simultaneously clamp the substrate and the composite layer.

[0011] Furthermore, the edging is welded to the substrate and the composite layer respectively by intermittent fusion welding to form intermittent weld points.

[0012] Furthermore, the spacing between the intermittent weld points is controlled to be between 80 and 120 mm.

[0013] Furthermore, the portion of the composite layer held by the edge is provided with a flattened portion.

[0014] Preferably, the composite layer is a perforated plate or mesh, and the composite layer has a recessed portion that sinks into the substrate.

[0015] Furthermore, the through hole is rhomboid in shape.

[0016] Furthermore, the sinking distance of the sinking part is controlled at 10-15mm.

[0017] The beneficial effects of this utility model are: 1) Effectively suppresses secondary dust and significantly improves dust removal efficiency: This utility model adds a composite layer to the surface of the substrate and forms a cavity. At the same time, it opens a through hole on the composite layer to connect the outside and the cavity, forming a dual structure of "dust storage-dust interception". On the one hand, when the electrostatic precipitator is working, negatively charged dust particles can enter the cavity through the through hole for temporary storage, increasing the dust collection path. On the other hand, during the dust removal process, the composite layer can directly intercept the dust that is laterally scattered from the surface of the substrate, preventing it from escaping under the action of airflow and forming secondary dust. Ultimately, it greatly improves the actual dust removal efficiency of the electrostatic precipitator and meets increasingly stringent environmental emission standards. 2) Enhanced dust collection capacity and optimized dust adsorption effect: The present invention increases the contact area between the substrate and the dust by setting the concave and convex parts (composed of grooves and / or convex ridges) on the surface of the substrate, thereby improving the effectiveness of electrostatic adsorption; at the same time, the dust collection groove located at the end of the substrate can also collect the dust in the edge area in a concentrated manner, reducing the accumulation and shedding of dust at the edge of the electrode plate. 3) Stable and reliable structure, extending service life: In this utility model, the C-shaped edging can clamp the substrate and the composite layer simultaneously through intermittent welding (the point spacing is controlled between 80 and 120 mm), which not only ensures the stability of the connection between the two, but also avoids material stress deformation caused by continuous welding; the flattened part design of the composite layer further enhances its tightness with the edging; in addition, the suspension mechanism consisting of positioning holes and hooks located on the substrate can be directly adapted to the existing electrostatic precipitator installation system without additional adjustment of the equipment structure, reducing the installation difficulty; 4) Flexible application and strong adaptability: This utility model is also applicable to the renovation of old units with serious secondary dust problems, because the substrate can be a universal anode plate, without the need to replace the suspension system and dust removal system, etc., only the composite layer and edge wrapping need to be added in place on the original anode plate.

[0018] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a front view of the composite anode plate of this utility model; Figure 2 This is a right view of the composite anode plate of this utility model; Figure 3 This is a front view of the substrate of the composite anode plate of this utility model; Figure 4 This is a right view of the substrate of the composite anode plate of this utility model; Figure 5 This is a front view of the composite layer of the composite anode plate of this utility model; Figure 6 This is a right view of the composite layer of the composite anode plate of this utility model.

[0020] In the figure: 31-substrate, 311-dust collection trench, 312-uneven part, 313-positioning hole, 314-hook, 32-composite layer, 321-through hole, 322-sunken part, 323-flattened part, 33-edge, 34-cavity. Detailed Implementation

[0021] See Figures 1 to 6The composite anode plate of this utility model includes a substrate 31, a composite layer 32 and an edge 33. The composite layer 32 is arranged on opposite sides of the substrate 31 through the edge 33 (this double-sided arrangement design basically does not increase the resistance of the dust collector). There is a cavity 34 between the substrate 31 and the composite layer 32 that can temporarily contain dust. Several through holes 321 are provided on the composite layer 32 to connect the outside world and the cavity 34.

[0022] The substrate 31 is bent at both ends to form dust collection grooves 311; the surface of the substrate 31 is provided with a concave-convex portion 312 composed of several grooves and convex ridges; a suspension mechanism composed of several positioning holes 313 and hooks 314 is also provided on the substrate 31; wherein, the substrate 31 can be made of ordinary carbon steel (low cost, wide availability, good conductivity and mechanical strength, able to meet the dust collection requirements under general working conditions, suitable for environments with low flue gas temperature and weak corrosivity, such as electrostatic precipitators at the tail of coal-fired power plant boilers, etc.), stainless steel (significantly better corrosion resistance than ordinary carbon steel, especially stable in flue gas containing corrosive components such as acids, alkalis and salts, while maintaining good conductivity and mechanical properties, suitable for flue gas purification scenarios with strong corrosivity such as waste incineration power plants and chemical industries), or alloy materials (by adjusting the alloy composition, such as adding elements such as chromium, nickel and molybdenum, it can have both good conductivity, corrosion resistance and high temperature stability, usually used under specific harsh working conditions).

[0023] The edge 33 is C-shaped and can simultaneously clamp the substrate 31 and the composite layer 32; the edge 33 is welded to the substrate 31 and the composite layer 32 respectively by intermittent fusion welding to form intermittent weld points, and the spacing between the intermittent weld points is controlled at 100mm; this clamping + intermittent welding design is not only simple and compact in structure, but also firmly fixes the substrate 31 and the composite layer 32 together.

[0024] The composite layer 32 is a mesh; the through holes 321 are rhomboid in shape and can be formed by machine punching, and their size can be adjusted according to the characteristics of the dust; the composite layer 32 is provided with a recessed portion 322 that sinks toward the substrate 31, and the recessed distance of the recessed portion 322 (e.g., Figure 6 The distance d is controlled at 10-15mm (adjusted according to the characteristics of the dust); in addition, the two opposite ends of the composite layer 32 (i.e. the parts clamped by the edge) are also provided with flattened portions 323; considering that the composite layer 32 needs to have both corrosion resistance and deformation resistance, stainless steel (excellent corrosion resistance, good structural stability and processability), titanium and titanium alloy materials (extremely strong corrosion resistance, can achieve lightweight + high strength) or galvanized / aluminized zinc alloy steel (lower cost) are selected for manufacturing.

[0025] The working process of this utility model: Before use, the composite anode plate and cathode wire need to be alternately arranged in the flue gas channel of the electrostatic precipitator. During operation, negatively charged dust particles can enter the cavity 34 along the through holes 321 and be adsorbed on the surface of the substrate 31. When the electrostatic precipitator uses the cleaning system to vibrate and clean the composite anode plate, the composite layer 32 can intercept the escaped dust, so that the dust adsorbed on the substrate 31 is less likely to cause secondary dust generation during cleaning and instead falls directly into the ash hopper, thereby effectively improving the dust removal efficiency.

[0026] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A composite anode plate, characterized in that: The composite layer (32) includes a substrate (31), a composite layer (32), and a edging (33). The composite layer (32) is arranged on at least one side of the substrate (31) through the edging (33). A cavity (34) for temporarily containing dust is separated between the substrate (31) and the composite layer (32). A plurality of through holes (321) are provided on the composite layer (32) to connect the outside world with the cavity (34).

2. The composite anode plate as described in claim 1, characterized in that: At least one end of the substrate (31) is bent to form a dust collection groove (311).

3. The composite anode plate as described in claim 1, characterized in that: The surface of the substrate (31) is provided with a concave-convex portion (312) consisting of a plurality of grooves and / or protrusions.

4. The composite anode plate as described in claim 1, characterized in that: The substrate (31) is also provided with a suspension mechanism consisting of a number of positioning holes (313) and / or hooks (314).

5. The composite anode plate as described in claim 1, characterized in that: The edging (33) is C-shaped and can simultaneously clamp the substrate (31) and the composite layer (32).

6. The composite anode plate as described in claim 5, characterized in that: The edge banding (33) is welded to the substrate (31) and the composite layer (32) respectively by intermittent fusion welding to form intermittent weld points.

7. The composite anode plate as described in claim 6, characterized in that: The spacing between the intermittent weld points is controlled between 80 and 120 mm.

8. The composite anode plate according to any one of claims 1 to 7, characterized in that: The composite layer (32) is a perforated plate or mesh, and the composite layer (32) has a recessed portion (322) that sinks into the substrate (31).

9. The composite anode plate as described in claim 8, characterized in that: The through hole (321) is rhomboid in shape.

10. The composite anode plate as described in claim 8, characterized in that: The sinking distance of the sinking part (322) is controlled at 10-15mm.

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