A rotating insulation filter tank dust collection device of an electric dust collector and an electric dust collector

Abstract

The application provides a rotating insulation filter groove dust collecting device of an electric dust collector and the electric dust collector. The electric dust collector comprises anode plates and cathode wires which are arranged at intervals. The filter groove dust collecting device is arranged on the downstream end side of the anode plate along the flue gas direction and is arranged perpendicularly to the flue gas direction. The filter groove dust collecting device comprises a rotating sleeve and a plurality of dust collecting filter grooves which are arranged along the outer side wall of the rotating sleeve at intervals in the circumferential direction. The plurality of dust collecting filter grooves are distributed in a spiral shape. When the electric dust collector is normally operated, the flue gas enters the dust collecting filter grooves, and the dust in the flue gas is collected in the dust collecting filter grooves. Meanwhile, the flue gas drives the dust collecting filter grooves to rotate, and the flue gas continues to flow into the flue gas after the rotation. The device solves the problems that the traditional static filter groove dust collecting device increases the resistance of the electric dust collector body, the surface is easily hardened, and the dust collecting efficiency is reduced. Meanwhile, the device has the advantages of reliable and simple structure, small weight, and low cost.

Description

Technical Field

[0001] This invention belongs to the field of mechanical engineering technology, specifically relating to a rotary insulating filter dust collection device for an electrostatic precipitator and an electrostatic precipitator. Background Technology

[0002] Before the dust enters the electric field of the electrostatic precipitator, the dust concentration distribution across the flow section is relatively uniform. However, towards the end of the electric field, due to the electric field force, the dust concentration distribution changes significantly. The trend is that the dust concentration is higher closer to the collecting plate than to the discharge electrode, while there is almost no dust near the discharge electrode. Although most dust is close to the collecting plate, due to the mutual repulsion of charged dust particles and insufficient charging of some dust particles, some dust cannot be captured by the collecting plate and escapes the electric field along the surface of the collecting plate with the airflow. When the electric field is used for rapping and cleaning, most of the secondary dust also escapes the electric field along the surface of the anode plate. In fact, most of the dust that is not captured by the collecting plate escapes the electric field along the surface of the collecting plate. Therefore, it is currently common to add an electrostatic filter tank dust collection device at the end of the electric field to capture the dust escaping along the surface of the anode plate at the end of the electric field.

[0003] Currently mainstream electrostatic precipitator dust collection devices such as Figure 1 As shown, this filter tank is typically made of porous metal plates, metal wire mesh (such as cold-drawn manganese-nickel alloy wire), or conductive materials. It can effectively collect secondary dust generated by the end-stage electric field vibration, but it also presents several problems. For example, a fixed filter tank increases the operating resistance of the electrostatic precipitator. Studies have shown that a filter tank with a width of 200-400 mm can increase the operating resistance of the electrostatic precipitator by 50-100 Pascals. Furthermore, given the ammonia escape from upstream denitrification equipment, ammonium bisulfate and dust easily form agglomerates on the surface of the filter tank, which is made of conductive materials and has a low flue gas velocity, rendering its electrostatic adsorption function ineffective and further increasing operating resistance and system energy consumption. Flue gas easily forms eddies within the filter tank, carrying away some of the dust already captured, reducing dust removal efficiency.

[0004] To address the aforementioned issues, it is necessary to propose a reasonably designed and effective electrostatic precipitator rotary insulated filter dust collection device and electrostatic precipitator. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a rotary insulated filter dust collection device for electrostatic precipitators and an electrostatic precipitator.

[0006] One aspect of the present invention provides a rotary insulated filter dust collection device for an electrostatic precipitator, the electrostatic precipitator comprising anode plates and cathode wires arranged at intervals, the filter dust collection device being disposed on the downstream end side of the anode plates along the flue gas direction and perpendicular to the flue gas direction; wherein... The dust collection device includes a rotating sleeve and a plurality of dust collection filter tanks spaced circumferentially along the outer side wall of the rotating sleeve; the plurality of dust collection filter tanks are arranged in a spiral shape; wherein... When the electrostatic precipitator is operating normally, the flue gas enters the dust collection filter tank, and the dust in the flue gas is collected in the dust collection filter tank. At the same time, the flue gas drives the dust collection filter tank to rotate, and after rotation, it continues to flow into the flue gas.

[0007] Optionally, the rotating sleeve includes a fixed inner cylinder and a rotating outer cylinder rotatably sleeved on the outside of the fixed inner cylinder; the fixed inner cylinder is fixedly connected to the anode plate.

[0008] Optionally, the filter dust collection device further includes a connecting plate; The first end of the connecting plate is fixedly connected to the anode plate, and the second end of the connecting plate is fixedly connected to the fixed inner cylinder.

[0009] Optionally, the filter dust collection device further includes fixing bolts, and the fixing inner cylinder is fixed to the connecting plate by the fixing bolts.

[0010] Optionally, multiple dust collection filter tanks are arranged at equal intervals.

[0011] Optionally, the dust collection filter is made of polytetrafluoroethylene material.

[0012] Optionally, the surface of the dust collection filter tank is provided with an anti-stick and anti-fouling coating.

[0013] Optionally, the anti-stick and anti-fouling coating is formed by using ethanol as a solvent, fluorocarbon silanes and organosilicon as coupling agents, and then modifying and drying it to form a dense coating.

[0014] Optionally, the length of the dust collection filter tank is the same as the length of the side portion of the anode plate.

[0015] Another aspect of the present invention provides an electrostatic precipitator, comprising anode plates and cathode wires arranged at intervals, and further comprising at least one of the aforementioned electrostatic precipitator rotary insulating filter dust collection devices.

[0016] The present invention provides a rotary insulating filter dust collection device and an electrostatic precipitator. The rotary insulating filter dust collection device includes a rotating sleeve and multiple dust collection filter tanks arranged circumferentially along the outer side wall of the rotating sleeve, the multiple dust collection filter tanks being spirally distributed. By setting the dust collection filter tanks as a rotatable structure, the flue gas entering the filter tanks pushes the filter tanks to rotate while collecting dust. The rotated flue gas can smoothly flow into the main airflow, avoiding the direct obstruction of flue gas by traditional fixed filter tanks, thereby significantly reducing airflow resistance. In addition, the multiple dust collection filter tanks are arranged in a spiral shape and rotate with the rotating sleeve, so that the relative position of the filter tanks with the airflow changes continuously during the rotation process, reducing the local flue gas velocity in the tanks and avoiding the formation of eddies, thereby preventing the collected dust from being carried out of the electric field again by the flue gas and improving dust collection efficiency. Since a rotary mechanical collection method is adopted, the device body does not need to use conductive metal materials, so there is no problem of ammonium bisulfate and dust caking on conductive surfaces, which leads to the failure of adsorption function, ensuring long-term stable operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an electrostatic precipitator dust collection device in the prior art; Figure 2 This is a schematic diagram of the structure of a rotary insulated filter dust collection device for an electrostatic precipitator according to an embodiment of the present invention. Figure 3 This is a schematic diagram showing the connection relationship between the rotary insulating filter dust collection device and the anode plate in another embodiment of the electrostatic precipitator of the present invention. Figure 4 This is a schematic diagram showing the positional relationship between the rotary insulating filter dust collection device and the anode plate in another embodiment of the electrostatic precipitator of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 2 to 4 As shown, one aspect of the present invention provides a rotary insulating filter dust collection device for an electrostatic precipitator. The electrostatic precipitator includes anode plates and cathode wires arranged at intervals. The filter dust collection device is disposed on the downstream end side of the anode plate along the flue gas direction and is arranged perpendicular to the flue gas direction.

[0020] The dust collection device includes a rotating sleeve and a plurality of dust collection filter tanks 1 arranged circumferentially along the outer side wall of the rotating sleeve; the plurality of dust collection filter tanks 1 are arranged in a spiral shape; wherein, when the electrostatic precipitator is operating normally, flue gas enters the dust collection filter tank 1, the dust in the flue gas is collected in the dust collection filter tank 1, and at the same time the flue gas pushes the dust collection filter tank 1 to rotate, and continues to flow into the flue gas after rotation.

[0021] Specifically, the flue gas entering the dust collection filter 1 can both perform work to drive the filter 1 to rotate and continue to flow into the flue gas after rotation. Compared to the direct blowing of flue gas into the dust collection filter 1 in an electrostatic precipitator, this significantly reduces the resistance of the electrostatic precipitator itself. Furthermore, existing electrostatic precipitator dust collection devices require conductive stainless steel materials to adsorb dust onto their surfaces to prevent it from being blown out by the flue gas. This leads to the ammonia sulfate produced by ammonia escape from the denitrification system and the gel-like substance formed by dust caking into the tank, causing the electrostatic adsorption to fail and the filter tank to quickly become clogged. Moreover, the caking is extremely difficult to clean. In this embodiment, because the dust collection filter 1 can rotate, the flue gas velocity inside the filter tank is reduced, preventing the formation of eddies and making it less likely for the dust already captured in the filter tank to be carried out again by the flue gas.

[0022] The rotary insulating filter dust collection device for electrostatic precipitators provided by this invention features a rotatable dust collection filter. The flue gas entering the filter drives its rotation while collecting dust, allowing the rotated flue gas to smoothly flow into the main airflow. This avoids the direct obstruction of the flue gas by traditional fixed filter tanks, significantly reducing airflow resistance. Furthermore, multiple dust collection filter tanks are arranged in a spiral shape and rotate with the rotating sleeve, causing the relative position of the filter tanks to continuously change with the airflow during rotation. This reduces the local flue gas velocity within the tank, preventing eddy current formation and thus preventing the collected dust from being carried back out of the electric field by the flue gas, improving dust collection efficiency. Because a rotary mechanical collection method is used, the device body does not require conductive metal materials, eliminating the problem of ammonium bisulfate and dust caking on conductive surfaces, which could lead to adsorption failure and ensure long-term stable operation.

[0023] For example, such as Figure 2 As shown, the rotating sleeve includes a fixed inner cylinder 5 and a rotating outer cylinder 3 rotatably sleeved on the outside of the fixed inner cylinder 5; the fixed inner cylinder 3 is fixedly connected to the anode plate.

[0024] In this embodiment, the fixed inner cylinder and the rotating outer cylinder are fitted together to provide a reliable rotation axis for the dust collection filter tank, so that the filter tank can rotate smoothly under the push of flue gas, avoiding eccentricity or jamming, and improving the reliability of the device operation. The fixed inner cylinder, as a stationary component, can be directly fixed to the anode plate, ensuring the positional stability of the overall device. At the same time, the rotating outer cylinder can rotate freely, which is reasonable in structure and easy to maintain.

[0025] For example, such as Figure 2 As shown, the filter tank dust collection device also includes a connecting plate 2; the first end of the connecting plate 2 is fixedly connected to the anode plate, and the second end of the connecting plate 2 is fixedly connected to the fixed inner cylinder 5.

[0026] In this embodiment, the fixed inner cylinder and the anode plate are fixedly connected by a connecting plate, which provides a stable mechanical support for the device. At the same time, the connecting plate, as an intermediate adapter, can adapt to the anode plate structure of different models of electrostatic precipitators, thus improving the versatility and ease of installation of the device.

[0027] For example, such as Figure 2 As shown, the filter dust collection device also includes fixing bolts 4, and the fixing inner cylinder 5 is fixed to the connecting plate 2 by the fixing bolts 4.

[0028] In this embodiment, fixing bolts are used to fix the inner cylinder to the connecting plate, which not only ensures the rigidity of the connection, but also facilitates subsequent disassembly, inspection or replacement, thus reducing maintenance costs.

[0029] For example, such as Figure 2 As shown, multiple dust collection filter tanks 1 are arranged at equal intervals. This ensures that the rotating sleeve is subjected to uniform force during rotation, avoiding vibration and noise caused by eccentric mass and extending the service life of the device. The equal distribution of multiple dust collection filter tanks 1 ensures that each of the multiple dust collection filter tanks 1 has the same collection opportunity within the rotation cycle, making the dust collection effect more uniform in time and space.

[0030] For example, in this embodiment, the dust collection filter 1 is made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical corrosion resistance and heat resistance (can withstand ≤300℃ for a long time), enabling it to operate stably in sulfur-containing, humid, and high-temperature flue gas environments for extended periods, and is not easily oxidized or corroded. Compared to metal materials such as stainless steel, PTFE has a lower density, significantly reducing the weight of the device and avoiding additional mechanical stress on the anode plate of the electrostatic precipitator. Furthermore, its price is far lower than stainless steel, saving costs. It requires no conductivity, fundamentally avoiding the problem of conductive caking caused by ammonium bisulfate, and greatly reducing the frequency of cleaning caking. Compared to traditional conductive metal filter tanks, this device achieves the collection function through a rotating dust collection filter tank and insulating materials, resulting in lower cost, lighter weight, and no excessive mechanical burden on the anode plate.

[0031] For example, the surface of the dust collection filter 1 is provided with an anti-stick and anti-fouling coating. The anti-stick and anti-fouling coating is formed by using ethanol as a solvent, fluorocarbon silanes and organosilicon as coupling agents, and is modified and dried to form a dense coating. The anti-stick and anti-fouling coating has excellent anti-stick and anti-fouling properties. After curing at room temperature, it forms a dense coating that is wear-resistant and corrosion-resistant. It can withstand high-speed dust erosion for extended periods under high-temperature conditions (≤300℃), exhibiting stable performance and being resistant to oxidation. It also possesses strong adhesion to various substrates.

[0032] For example, the length of the dust collection filter 1 is the same as the length of the side of the anode plate, ensuring that the dust escaping along the surface of the anode plate can be captured by the filter 1 in the entire height direction without leaving any dead corners, thus maximizing the dust collection efficiency.

[0033] For example, since the device is rigidly connected to the anode plate of the electrostatic precipitator, dust in the dust collection filter tank 1 can be removed by anode vibration.

[0034] Another aspect of the present invention provides an electrostatic precipitator, comprising anode plates and cathode wires arranged at intervals, and further comprising at least one rotary insulated filter dust collection device as described above. Figure 3 As shown, preferably, the electrostatic precipitator includes two of the rotary insulated filter collection devices described above. These rotary insulated filter collection devices have been described in detail above and will not be repeated here.

[0035] The electrostatic precipitator of the present invention includes the above-mentioned rotary insulated filter dust collection device, which has lower overall operating resistance, higher dust collection efficiency, and longer maintenance cycle. It is especially suitable for complex working conditions with high dust concentration, sulfur and moisture content, and serious ammonia escape during denitrification, and has significant economic and environmental benefits. The dust collection device can be installed as an independent module at the end of the existing electrostatic precipitator without large-scale modification of the original equipment. The modification is simple and low-cost, and has broad industrial application value.

[0036] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A rotary insulated filter dust collection device for an electrostatic precipitator, the electrostatic precipitator comprising anode plates and cathode wires arranged at intervals, characterized in that, The dust collection device for the filter tank is located on the downstream end side of the anode plate along the flue gas direction and is perpendicular to the flue gas direction; wherein... The dust collection device includes a rotating sleeve and a plurality of dust collection filter tanks spaced circumferentially along the outer side wall of the rotating sleeve; the plurality of dust collection filter tanks are arranged in a spiral shape; wherein... When the electrostatic precipitator is operating normally, the flue gas enters the dust collection filter tank, and the dust in the flue gas is collected in the dust collection filter tank. At the same time, the flue gas drives the dust collection filter tank to rotate, and after rotation, it continues to flow into the flue gas.

2. The apparatus according to claim 1, characterized in that, The rotating sleeve includes a fixed inner cylinder and a rotating outer cylinder rotatably sleeved on the outside of the fixed inner cylinder; the fixed inner cylinder is fixedly connected to the anode plate.

3. The apparatus according to claim 2, characterized in that, The filter dust collection device also includes a connecting plate; The first end of the connecting plate is fixedly connected to the anode plate, and the second end of the connecting plate is fixedly connected to the fixed inner cylinder.

4. The apparatus according to claim 3, characterized in that, The filter tank dust collection device also includes fixing bolts, and the fixing inner cylinder is fixed to the connecting plate by the fixing bolts.

5. The apparatus according to claim 1, characterized in that, Multiple dust collection filter tanks are arranged at equal intervals.

6. The apparatus according to claim 1, characterized in that, The dust collection filter is made of polytetrafluoroethylene material.

7. The apparatus according to claim 1, characterized in that, The surface of the dust collection filter tank is provided with an anti-stick and anti-fouling coating.

8. The apparatus according to claim 1, characterized in that, The anti-stick and anti-fouling coating uses ethanol as a solvent, fluorocarbon silanes and organosilicon as coupling agents, and is formed into a dense coating after modification and drying.

9. The apparatus according to claim 1, characterized in that, The length of the dust collection filter tank is the same as the length of the side portion of the anode plate.

10. An electrostatic precipitator, characterized in that, It includes anode plates and cathode wires arranged at intervals, and also includes at least one rotary insulated filter dust collection device for electrostatic precipitators as described in any one of claims 1 to 9.

Images