Water-blocking structure and electrostatic precipitator

Abstract

This application relates to the technical field of rust prevention devices, specifically to a water-blocking structure and an electrostatic precipitator. The water-blocking structure includes a shell, a water-blocking sleeve, and a water-blocking plate. The shell has an air outlet. The water-blocking sleeve has two openings, a first end and a second end, with the second end fixedly connected to the shell. At least one ventilation window is provided on the sleeve wall, allowing communication between the interior of the water-blocking sleeve and the interior of the shell. The water-blocking plate is fixedly disposed at the first end to block it. In the water-blocking structure provided in this application, the water-blocking plate is fixedly disposed at and blocks the first end of the water-blocking sleeve. When handling high-temperature and high-humidity gases, the temperature near the air outlet of the shell drops, generating condensate. This condensate is blocked by the water-blocking plate during its descent, preventing it from entering the electrostatic precipitator through the first end and reducing the possibility of condensate flowing back into the electrostatic precipitator.

Description

Technical Field

[0001] This application relates to the field of rust prevention devices, and more specifically, to water-blocking structures and electrostatic precipitators. Background Technology

[0002] With increasingly stringent environmental protection requirements and rapid industrial development, ionization dust removal technology has been widely used in industries such as metallurgy, chemical engineering, and power generation due to its high efficiency in removing particulate matter. Ionization dust removal devices use a high-voltage electric field to charge dust particles in the gas, which are then adsorbed by the collecting electrode, thereby achieving gas purification.

[0003] A typical ionization dust removal device consists of core components such as a cathode cylinder, anode rod, dust collector housing, and main beam. During operation, a high-voltage DC power supply establishes a strong electric field between the cathode and anode, ionizing the gas passing through the device. Charged dust particles move towards the collecting electrode and deposit under the influence of the electric field force, while the purified gas is discharged from the outlet.

[0004] However, in actual operation, it was found that when processing high-temperature and high-humidity gases, water vapor condenses near the outlet due to the temperature drop. This condensate flows back along the inner wall of the device into the ionization dust collector, causing a series of problems: First, long-term contact between the condensate and metal parts can lead to corrosion of critical components such as the cathode cylinder and anode rod; second, the backflowing liquid forms a liquid film on the surface of the anode rod, interfering with the normal discharge process; finally, the accumulation of liquid may also change the electric field distribution, reducing dust removal efficiency. These factors collectively affect the stability and service life of the ionization dust collector. Utility Model Content

[0005] The purpose of this application is to provide a water-blocking structure and an electrostatic precipitator, wherein the water-blocking structure can prevent condensate from entering the electrostatic precipitator and slow down the corrosion of the electrostatic precipitator.

[0006] To achieve the above objectives, in a first aspect, this application provides a water-retaining structure, comprising: A housing, on which an air outlet is provided; A water-blocking sleeve, wherein the two ends of the water-blocking sleeve are a first end and a second end, the second end is fixedly connected to the housing, and at least one vent is provided on the sleeve wall, the vent allowing the interior of the water-blocking sleeve to communicate with the interior of the housing; A water baffle is fixedly installed at the first end to block the first end.

[0007] In an optional embodiment, the total cross-sectional area of ​​the ventilation windows is greater than or equal to the cross-sectional area of ​​the second end.

[0008] In an optional embodiment, the baffle plate is configured as a circular planar plate.

[0009] In an optional embodiment, the baffle is configured as a conical plate, with the sharp end of the baffle being away from the first end.

[0010] In an optional embodiment, the cross-sectional area of ​​the baffle plate is larger than the cross-sectional area of ​​the first end in the direction perpendicular to the axis of the baffle sleeve.

[0011] In an optional implementation, the height A of the lowest position of the vent is greater than the height B of the second end in the direction of gravity.

[0012] In an optional embodiment, a drain outlet is also included, which is disposed on the housing for draining liquid from the housing.

[0013] In an optional embodiment, the drain outlet is located at the bottom of the housing.

[0014] In an optional implementation, the height C of the highest position of the vent is less than the height D of the first end in the direction of gravity.

[0015] Secondly, the present invention provides an electrostatic precipitator, including an air outlet pipe and a water-blocking structure as described in any of the foregoing embodiments, wherein the second end is connected to the air outlet pipe.

[0016] In the water-blocking structure provided in this application, a water-blocking plate is fixedly installed at the first end of the water-blocking sleeve and seals it. When processing high-temperature and high-humidity gases, the temperature near the outlet of the shell drops, generating condensate. This condensate is blocked by the water-blocking plate as it falls, preventing it from entering the electrostatic precipitator through the first end and reducing the likelihood of condensate flowing back into the precipitator. Because this effectively reduces the backflow of condensate into the precipitator, the contact between key metal components such as the cathode cylinder and anode rod and the condensate is significantly reduced, thereby slowing down the corrosion rate of these components, extending their service life, and reducing equipment maintenance costs and replacement frequency.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1A schematic diagram of one embodiment of the water-blocking structure provided in this application; Figure 2 A schematic diagram of another embodiment of the water-blocking structure provided in this application.

[0020] icon: 100 - Shell; 110 - Condensate flow path; 120 - Flue gas flow path; 130 - Gas outlet; 200 - Water-blocking sleeve; 210 - First end; 220 - Second end; 230 - Vent window; 300-Water baffle; 400 - Drain outlet; 500-Connector; 600 - Exhaust pipe; 700-Electric tilt valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Embodiments of this application provide a water-blocking structure and an electrostatic precipitator. The water-blocking structure can be applied to the electrostatic precipitator to reduce the backflow of condensate from the outlet pipe 600 of the electrostatic precipitator into the electrostatic precipitator, thereby reducing corrosion of the electrostatic precipitator and ensuring its dust removal efficiency.

[0025] like Figure 1 As shown, in a first aspect, embodiments of this application provide a water-blocking structure, including a housing 100, a water-blocking sleeve 200, and a water-blocking plate 300.

[0026] An air outlet 130 is provided on the housing 100.

[0027] The water-blocking sleeve 200 has two open ends. The two ends of the water-blocking sleeve 200 are the first end 210 and the second end 220, respectively. The second end 220 is fixedly connected to the housing 100. The fixing method is, for example, welding, snap-fitting, bolting or riveting.

[0028] The water-blocking sleeve 200 has at least one ventilation window 230 on its cylinder wall, which allows the interior of the water-blocking sleeve 200 to communicate with the interior of the housing 100.

[0029] For example, one ventilation window 230 is provided. In another embodiment, two ventilation windows 230 are provided, equidistantly distributed around the circumference of the water-blocking sleeve 200. In yet another embodiment, three ventilation windows 230 are provided, equidistantly distributed around the circumference of the water-blocking sleeve 200. Of course, other numbers of ventilation windows 230 can also be provided, such as five, six, or seven.

[0030] A baffle plate 300 is fixedly installed at the first end 210 to block the first end 210. The baffle plate 300 is fixedly installed on the first end 210 by means of welding, snap-fitting or bolt connection.

[0031] For example, the water-blocking sleeve 200 is vertically arranged, with the first end 210 and the second end 220 distributed sequentially along the direction of gravity. Along the direction of gravity, the water-blocking plate 300 is located above the first end 210 to prevent condensate from flowing back into the housing 100 and the electrostatic precipitator.

[0032] Figure 1 The diagram shows the flue gas flow path 120. The second end 220 of the water-blocking sleeve 200 is connected to the outlet pipe 600 of the electrostatic precipitator. The flue gas discharged from the electrostatic precipitator enters the water-blocking sleeve 200 from the second end 220 and exits the water-blocking sleeve 200 from the vent 230. Figure 1 The diagram also shows the condensate flow path 110. During the fall of condensate in the flue gas, it is blocked by the baffle plate 300 to prevent condensate from entering the first end 210, thereby reducing the amount of condensate entering the electrostatic precipitator. In addition, flue gas is discharged at the ventilation window 230, which to some extent prevents condensate from entering the baffle sleeve 200 and the housing 100 from the ventilation window 230.

[0033] In this application, a baffle plate 300 is fixedly installed at the first end 210 of the baffle sleeve 200 and seals it. When processing high-temperature and high-humidity gases, the temperature near the outlet 130 of the casing 100 drops, generating condensate. As the condensate falls, it is blocked by the baffle plate 300, preventing it from entering the electrostatic precipitator through the first end 210 and reducing the possibility of condensate backflow into the electrostatic precipitator. Because this effectively reduces the backflow of condensate into the electrostatic precipitator, the contact opportunity between key metal components such as the cathode cylinder and anode rod and the condensate is greatly reduced, thereby slowing down the corrosion rate of these components, extending their service life, and reducing equipment maintenance costs and replacement frequency.

[0034] To ensure that the airflow of the electrostatic precipitator does not decrease after the water-blocking structure is installed, such as Figure 1 As shown, in one embodiment, the total cross-sectional area of ​​the ventilation windows 230 is greater than or equal to the cross-sectional area of ​​the second end 220.

[0035] The cross-sectional area of ​​the ventilation window 230 is the cross-sectional area through which flue gas can effectively circulate. The cross-sectional area of ​​the second end 220 is the cross-sectional area through which flue gas can effectively circulate.

[0036] For example, the inner diameter of the second end 220 is 1600mm, and its effective flue gas flow cross-sectional area is equal to π·(1600 / 2)·(1600 / 2). The conduction cross-sectional area of ​​the ventilation window 230 needs to be greater than or equal to π·(1600 / 2)·(1600 / 2).

[0037] The main purpose of installing a water-blocking structure on an electrostatic precipitator is to reduce condensate backflow. However, if the water-blocking structure is not properly designed, it may obstruct the normal discharge of flue gas, resulting in a reduction in air volume. By setting the total cross-sectional area of ​​the ventilation windows 230 to be greater than or equal to the cross-sectional area of ​​the second end 220, it can be ensured that the effective cross-sectional area of ​​the flow channel for flue gas will not decrease when passing through the water-blocking structure, and may even increase. This ensures that the air volume of the electrostatic precipitator will not decrease after the water-blocking structure is installed, maintaining the original ventilation performance of the device.

[0038] like Figure 1 As shown, in one embodiment, the baffle plate 300 is configured as a circular planar plate.

[0039] The circular planar plate has a symmetrical structure, which can effectively block condensate from all directions when sealing the first end 210. No matter which angle the condensate falls from, it will be blocked by the baffle plate 300, preventing the condensate from directly entering the baffle sleeve 200. This reduces the possibility of condensate flowing back into the electrostatic precipitator and effectively protects the key components inside the electrostatic precipitator, such as the cathode cylinder and anode rod, from corrosion.

[0040] The surface of the flat plate is smooth and even. When condensation falls onto the baffle plate 300, it can quickly slide down the surface to the outside of the baffle sleeve 200, preventing water from accumulating on the surface of the baffle plate 300 and forming puddles. This helps keep the baffle plate 300 dry, further improving its effect in blocking condensation, while also reducing potential corrosion problems caused by water accumulation and extending the service life of the baffle plate 300.

[0041] Unlike the above embodiment where the baffle plate 300 is configured as a circular planar plate, as shown in the example... Figure 2 As shown, in one embodiment, the baffle plate 300 is configured as a conical plate, with the sharp end of the baffle plate 300 being away from the first end 210.

[0042] The conical shape of the plate causes condensate to flow outwards along the conical surface after falling onto the baffle plate 300. Because the pointed end is far from the first end 210, the condensate naturally flows towards the edge of the baffle plate 300 and eventually drips onto the outside of the baffle sleeve 200, rather than accumulating in the center of the baffle plate 300 or near the first end 210. This design allows for faster and more efficient drainage of condensate, reducing its residence time on the baffle plate 300 and further reducing the risk of condensate flowing back into the electrostatic precipitator.

[0043] like Figure 1 As shown, in one embodiment, the cross-sectional area of ​​the baffle plate 300 is larger than the cross-sectional area of ​​the first end 210 in the direction perpendicular to the axis of the baffle sleeve 200, so that the baffle plate 300 protrudes from the first end 210, preventing the condensate flowing back from the vent 130 from entering the vent window 230 along the cylinder wall of the baffle sleeve 200, thereby further improving the water blocking effect.

[0044] like Figure 1 As shown, in one embodiment, in the direction of gravity, the height A of the lowest position of the vent 230 is greater than the height B of the second end 220, to prevent condensate from the bottom of the housing 100 from entering the water-blocking sleeve 200 through the vent 230.

[0045] In order to drain the condensate in the housing 100, such as Figure 1 As shown, in one embodiment, the water-blocking structure further includes a drain outlet 400, which is disposed on the housing 100 for discharging liquid from the housing 100.

[0046] For example, a pipe is connected to the drain outlet 400 for guiding the condensate discharged from the drain outlet 400 to the drain ditch.

[0047] To prevent condensation from accumulating at the bottom of the casing 100, such as Figure 1 As shown, in one embodiment, a drain outlet 400 is provided at the bottom of the housing 100.

[0048] The drain outlet 400 is located at the bottom of the housing 100, making full use of gravity. Since condensate is denser than air, it naturally sinks and accumulates at the bottom of the housing 100. At this point, the drain outlet 400 is positioned where the condensate accumulates. Without the need for additional power equipment, the condensate can smoothly drain from the housing 100 through the drain outlet 400 under the influence of gravity. This drainage method is simple, efficient, and energy-saving, reducing the operating costs of the equipment.

[0049] If condensate accumulates inside the housing 100, it will be in prolonged contact with the housing material, especially when the housing 100 is made of metal. The moisture in the condensate and any acidic or alkaline substances it may contain will accelerate the corrosion process of the metal, causing the housing 100 to thin and perforate, affecting the structural strength and service life of the equipment. By installing a drain outlet 400 to promptly drain the condensate, the contact time between the condensate and the housing 100 can be effectively reduced, lowering the risk of corrosion and extending the service life of the equipment.

[0050] Assuming the height C of the highest point of the vent 230 is equal to the height D of the first end 210, the top of the vent 230 will contact the baffle 300, reducing the connection area between the baffle 300 and the baffle sleeve 200. Therefore, to increase the connection area between the baffle 300 and the baffle sleeve 200, such as... Figure 1 As shown, in one embodiment, in the direction of gravity, the height C of the highest position of the vent 230 is less than the height D of the first end 210, which enhances the connection strength between the baffle 300 and the baffle sleeve 200.

[0051] like Figure 1 As shown, in one embodiment, the water-blocking structure further includes a plug pipe 500, which is fixedly installed at the air outlet 130 on the housing 100. Part of the plug pipe 500 is inserted into the housing 100, which reduces the impact of flue gas on the inner wall of the air outlet 130 on the housing 100 and improves the service life of the housing 100.

[0052] The insertion tube 500 is fixedly connected to the housing 100 by welding or integral molding.

[0053] like Figure 1 As shown, in a second aspect, embodiments of this application provide an electrostatic precipitator, including an exhaust pipe 600 and a water-blocking structure as described in any of the above embodiments, with a second end 220 connected to the exhaust pipe 600, the connection method being, for example, welding, snap-fitting, or riveting.

[0054] For example, the electrostatic precipitator also includes an electrically operated tilt valve 700, which is disposed on the outlet pipe 600 near the second end 220. The electrically operated tilt valve 700 is used to control the opening or closing of the outlet pipe 600.

[0055] The backflow of liquid forming a liquid film on the surface of the anode rod can interfere with the normal discharge process. However, this water-blocking structure prevents the backflow of condensate and avoids the formation of a liquid film on the surface of the anode rod. This ensures that the strong electric field established between the cathode and anode by the high-voltage DC power supply can work stably, allowing the processes of gas ionization and dust particle charging and adsorption to proceed smoothly, thus maintaining the normal dust removal function of the electrostatic precipitator.

[0056] Liquid accumulation alters the electric field distribution, reducing dust removal efficiency. By incorporating a water-blocking structure to reduce the inflow of condensate into the electrostatic precipitator, liquid accumulation is prevented, thus maintaining the stability of the electric field distribution. This ensures the electrostatic precipitator can continuously and efficiently remove dust particles from the gas, guaranteeing dust removal effectiveness and improving the operational stability and reliability of the electrostatic precipitator.

[0057] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water-blocking structure, characterized in that, include: A housing (100) having an air outlet (130) on it. A water-blocking sleeve (200) has two openings, a first end (210) and a second end (220), respectively. The second end (220) is fixedly connected to the housing (100). At least one ventilation window (230) is provided on the wall of the water-blocking sleeve (200), and the ventilation window (230) allows the interior of the water-blocking sleeve (200) to communicate with the interior of the housing (100). A water baffle (300) is fixedly disposed at the first end (210) to block the first end (210).

2. The water-blocking structure according to claim 1, characterized in that, The total cross-sectional area of ​​the ventilation window (230) is greater than or equal to the cross-sectional area of ​​the second end (220).

3. The water-blocking structure according to claim 1, characterized in that, The water baffle (300) is configured as a circular planar plate.

4. The water-blocking structure according to claim 1, characterized in that, The baffle plate (300) is configured as a conical plate, with the sharp end of the baffle plate (300) being away from the first end (210).

5. The water-blocking structure according to claim 1, characterized in that, In the direction perpendicular to the axis of the water-blocking sleeve (200), the cross-sectional area of ​​the water-blocking plate (300) is greater than the cross-sectional area of ​​the first end (210).

6. The water-blocking structure according to claim 1, characterized in that, In the direction of gravity, the height A of the lowest position of the ventilation window (230) is greater than the height B of the second end (220).

7. The water-blocking structure according to claim 1, characterized in that, It also includes a drain outlet (400) disposed on the housing (100) for draining liquid from the housing (100).

8. The water-blocking structure according to claim 7, characterized in that, The drain outlet (400) is located at the bottom of the housing (100).

9. The water-blocking structure according to claim 1, characterized in that, In the direction of gravity, the height C of the highest position of the ventilation window (230) is less than the height D of the first end (210).

10. An electrostatic precipitator, characterized in that, It includes an air outlet pipe (600) and a water-blocking structure as described in any one of claims 1 to 9, wherein the second end (220) is connected to the air outlet pipe (600).

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