A rectifier-type electric dust collector

Abstract

This application discloses a rectifying electrostatic precipitator, belonging to the field of dust collector technology. By sequentially setting a guide layer, a mixing layer, and a stabilizing layer in the inlet conical section of the outer shell, multiple airfoil-shaped guide elements in the guide layer evenly distribute the airflow, directing it across the entire inlet conical section of the outer shell. Multiple sets of grid holes in the mixing layer employ a staggered grid design to break up large-scale eddies in the flue gas guided by the guide layer, reducing them to smaller sizes and achieving initial velocity equilibrium. The stabilizing layer features a honeycomb open-cell design; the honeycomb structure effectively manages the airflow and stabilizes the velocity. Thus, the flue gas undergoes a three-stage process of "guidance-breakup-management" to achieve refined flow field treatment, improve velocity distribution uniformity, and reduce inlet local resistance.

Description

Technical Field

[0001] This application relates to the field of dust collector technology, and in particular to a rectifier electrostatic precipitator. Background Technology

[0002] Electrostatic precipitators are a type of gas dust removal method. Dust-laden gas is electrically separated by a high-voltage electrostatic field. Dust particles combine with negative ions, becoming negatively charged, and then discharge and deposit on the anode surface. Currently, traditional flat-plate perforated plates have poor uniformity in airflow diffusion, leading to poor dust collection efficiency of the subsequent anode plates. Summary of the Invention

[0003] This application provides a rectifier-type electrostatic precipitator. It solves the problem in the prior art where traditional flat-plate perforated plates have poor airflow uniformity and diffusion, leading to poor dust collection efficiency of the subsequent anode plates. The technical solution is as follows: On the one hand, a rectifier electrostatic precipitator is provided, the rectifier electrostatic precipitator comprising: a shell, a flow guiding layer, a mixing layer and a stabilizing layer; The outer shell has an inlet conical section; the guide layer, mixing layer and stabilizing layer are all fixed to the inlet conical section and are arranged sequentially from the flue gas flow direction; The flow guide layer includes: a plurality of airfoil-shaped curved surface flow guides arranged in a vertical array; The mixing layer includes: a mixing plate, wherein the mixing plate is provided with multiple sets of grid holes arranged in parallel along a preset direction, and each set of grid holes has multiple grid holes arranged in an array along a direction perpendicular to the preset direction, and the grid holes in adjacent sets of grid holes are arranged alternately. The stabilizing layer includes a honeycomb core board with multiple honeycomb core holes, and the opening of each honeycomb core hole faces the mixing plate.

[0004] Optionally, the airfoil-shaped guide has a leading edge end and a trailing edge end that are disposed opposite to each other, the included angle of the leading edge end being greater than the included angle of the trailing edge end, wherein the leading edge end faces the inlet cone segment.

[0005] Optionally, the honeycomb core board has a plurality of honeycomb core holes that are evenly distributed.

[0006] Optionally, the multiple sets of grid holes include: a first set of openings and a second set of openings arranged alternately in the vertical direction, the first set of openings including a plurality of first openings arranged in a horizontal array and facing the flow guide layer, the second set of openings including a plurality of second openings arranged in a horizontal array and facing the flow guide layer, and the first openings and second openings in adjacent first sets of openings and second sets of openings being arranged alternately.

[0007] Optionally, each of the first openings is a strip-shaped opening extending in a vertical direction; each of the second openings is a strip-shaped opening extending in a vertical direction.

[0008] Optionally, the plurality of first openings are distributed at equal intervals along the horizontal direction; the plurality of second openings are distributed at equal intervals along the horizontal direction.

[0009] Optionally, the inner wall of the housing is provided with a plurality of protrusion structures.

[0010] Optionally, the housing has an intermediate section connected to the inlet conical section; the rectifier electrostatic precipitator includes: at least one set of dust collection plates arranged in an array along the flue gas propagation direction within the intermediate section, each set of dust collection plates comprising multiple dust collection plates arranged in a horizontal direction.

[0011] Optionally, each of the dust collecting plates includes: a dust collecting element and a rectifier; The dust collection component has two dust collection surfaces arranged perpendicular to the direction of flue gas flow on both sides. The rectifier is fixed to one end of the dust collector on the windward side. The inner wall of the rectifier forms a flue gas rectifier cavity. The outer wall of the rectifier includes a windward surface and two side surfaces disposed between the windward surface and the two dust collector surfaces. The two side surfaces are arranged opposite to each other and are respectively connected to the windward surface and the corresponding dust collector surface. The windward surface is a first arc-shaped convex surface. The rectifier is provided with at least one inlet hole distributed on the windward side and communicating with the flue gas rectifier cavity, and at least one outlet hole distributed on at least one side and communicating with the flue gas rectifier cavity.

[0012] Optionally, the rectifier includes: a rectifier shroud and a dust filter plate connected to each other, wherein the dust filter plate is distributed between the rectifier shroud and the dust collection component; The flue gas rectifier cavity is formed between the hood and the dustproof plate; the hood is provided with the windward side and two side sides, and the dustproof plate is connected between the two side sides; the side of the dustproof plate facing the hood is a second arc-shaped convex surface.

[0013] Optionally, both the first and second arc-shaped convex surfaces are circular arc surfaces, and the radius of the first arc-shaped convex surface is greater than the radius of the second arc-shaped convex surface.

[0014] Optionally, both sides are provided with drainage holes, and the drainage holes on each side are inclined toward the corresponding dust collection surface.

[0015] Optionally, the dust collection component includes two dust collection plates arranged opposite each other in a direction perpendicular to the flue gas flow direction, with the sides of the two dust collection plates fixedly connected to the two side surfaces respectively; wherein, the side of one dust collection plate facing away from the other dust collection plate is the dust collection surface.

[0016] Optionally, the dust collection surfaces of both dust collection plates are concave arc surfaces.

[0017] Optionally, both concave arc surfaces are circular arc surfaces, and the curvature of the two circular arc surfaces is the same.

[0018] The beneficial effects of the technical solutions provided in this application include at least the following: (1) By sequentially setting a guide layer, a mixing layer, and a stabilizing layer in the conical section of the inlet of the shell, the multiple airfoil curved surface guides in the guide layer evenly distribute the airflow and guide the airflow uniformly to the entire cross section. The first and second opening groups in the mixing layer adopt an alternating grid design to break up the large-scale eddies in the flue gas guided by the guide layer, reducing them to smaller sizes and achieving initial velocity equilibrium. The stabilizing layer is designed as a honeycomb opening type, and the honeycomb structure can effectively sort the airflow and stabilize the velocity. In this way, the flue gas undergoes a three-stage process of "guidance-breaking-sorting" to achieve refined flow field processing, improve the uniformity of velocity distribution, and reduce local resistance at the inlet.

[0019] (2) The rectifier in the rectifier dust collector plate has a first arc-shaped convex surface on the windward side, that is, the head of the rectifier is similar to the head of a water droplet (similar to the function of a windproof hook). When the flue gas flows through this area, it transitions smoothly without forming turbulence or eddies. The rectifier dust collector plate for dust removal is equipped with two rectifiers, which are distributed at two opposite ends of the dust collector along the flue gas flow direction. In this way, the rectifier dust collector plate is similar to two elongated water droplets cross-linked together, with both the windward and leeward sides being the heads of water droplets (similar to the function of a windproof hook). The dust collector plate can be used alternately at both ends, which improves the installation flexibility of the dust collector plate and increases its service life.

[0020] (3) The rectifier dust collection plate guides the flue gas smoothly into the electric field through the arc-shaped rectifier hood at the head, which will not affect the surface of the plate at the rear end. The plate surface adopts a streamlined curved surface design, which can effectively guide the dust-laden airflow into the electrostatic precipitator, reduce its flow velocity on the curved surface, avoid the direct impact of high-speed airflow on the plate, thereby significantly extending the service life of the plate and suppressing secondary dust.

[0021] (4) The curved dust collection plate adopts a curved design, and its dust collection surface is a concave arc surface. Compared with the plate dust collection electrode, the dust collection area is effectively increased. The field strength in each area of ​​the electrode plate is basically the same, the plate current density uniformity is not much different, the dust collection capacity is greatly enhanced, and the stability and efficiency of the dust removal process are ensured.

[0022] (5) In terms of rapping force transmission, flat dust collection plates mainly follow a linear path, the force decays rapidly during transmission, and the energy is mainly concentrated in the vicinity of the rapping point, resulting in a significant localization effect. In contrast, the curved structure in this application has a natural thin film effect, and rapping force transmission is mainly in-plane transmission. When the rapping force is applied to the curved surface, most of the rapping force is converted into thin film stress acting in the curved surface. These thin film stresses diffuse and transmit relatively evenly along the entire surface of the curved surface, efficiently diverting the load to the boundary of the entire structure, realizing a distributed path, and having a global effect. The force distribution is wider, the stress and deformation in the local area (impact point) are relatively small, the entire structure has a stronger ability to bear the load, and is more sensitive to rapping impact. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a front view of a rectifier electrostatic precipitator provided in an embodiment of this application; Figure 2 yes Figure 1 A top view of a rectifier electrostatic precipitator is shown. Figure 3 yes Figure 2 Sectional view at C-C'; Figure 4 yes Figure 2 Sectional view at B-B'; Figure 5 yes Figure 2 Sectional view at A-A'; Figure 6 This is a partial structural diagram of a shell provided in an embodiment of this application; Figure 7 yes Figure 6 A structural diagram from another perspective; Figure 8 This is a schematic diagram of the structure of a dust collection electrode plate provided in an embodiment of this application; Figure 9 This is a top view of a dust collection electrode plate provided in an embodiment of this application; Figure 10 This is a partial structural schematic diagram of a dust collection electrode plate provided in an embodiment of this application; Figure 11 This is a schematic diagram of the deployed arc-shaped fairing provided in an embodiment of this application; Figure 12This is a schematic diagram of the installation of a dust collecting electrode plate and a cathode wire provided in an embodiment of this application.

[0025] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0026] 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, not all, of the embodiments of the present invention. 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.

[0027] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0028] The existing technologies have the following problems: 1. A multi-layer airflow distribution plate is installed inside the inlet horn to improve airflow uniformity. The distribution plate is usually an open plate. Here, a multi-layer plate perforated plate structure is adopted. After the inlet flue gas passes through the distribution plate, the average velocity range is within 1~4m / s. CFD airflow simulation and field test show that the plate perforated plate has an unsatisfactory effect on the diffusion and buffering of dust flow. It usually causes the wind speed at the bottom and sides of the distribution plate to be extremely low or even zero, while the local wind speed in the middle of the distribution plate is as high as 4m / s or more, and even serious jet phenomenon occurs.

[0029] 2. Most dust collection electrodes are plate-type. To prevent high wind speeds from affecting the collected dust, windproof hooks are usually installed at both ends of the electrode along the airflow direction. This serves two purposes: firstly, it suppresses secondary dust generation caused by rapping; secondly, it prevents the electrode from being worn by dust flow. Theoretically, the windproof hooks of the plate-type dust collector have a plate-like structure, which is equivalent to using a "blocking" method. However, in actual operation, when the airflow comes into contact with the windproof hooks, it will diffuse disorderly to both sides, easily forming eddies and disturbing the dust layer on the electrode surface, thus reducing the original dust collection efficiency.

[0030] 3. The side walls of an electrostatic precipitator are typically flat and smooth. Here, any real fluid (including flue gas) possesses viscosity. When flue gas flows through the inner wall of the flat shell, the portion of the flue gas particles adhering to the wall will be "stuck" to the wall due to viscosity, reducing their velocity to zero. From the wall towards the center of the channel, due to internal friction (viscous force), the velocity gradually increases, forming a boundary layer. The total length of the electric field in a conventional electrostatic precipitator is typically between 18m and 26m. The boundary layer becomes increasingly thicker with the length of the flow channel, sometimes leading to wall-adhering flow, increasing the flue gas velocity in the center of the channel, and increasing system resistance. The velocity in the boundary layer is close to zero, causing some dust to settle and accumulate, reducing the cross-sectional area of ​​the flow channel and lowering dust removal efficiency.

[0031] Based on the shortcomings of the existing technology, this embodiment proposes an improved rectifier-type electrostatic precipitator. Please refer to... Figures 1 to 5 , Figure 1 This is a front view of a rectifier electrostatic precipitator provided in an embodiment of this application. Figure 2 yes Figure 1 The top view of the rectifier electrostatic precipitator shown is as follows: Figure 3 yes Figure 2 Sectional view at C-C' Figure 4 yes Figure 2 Sectional view at B-B' Figure 5 yes Figure 2 A cross-sectional view at A-A'. The rectifier electrostatic precipitator may include: a housing 100, a flow guiding layer 200, a mixing layer 300, and a stabilizing layer 400. Figure 3 The arrows in the diagram indicate the direction of the flue gas.

[0032] The outer casing 100 of the rectifier electrostatic precipitator may have an inlet conical section 101 and an intermediate section 102 arranged sequentially. The inlet conical section 101 is provided with a flue gas inlet k1, and the cross-section of the inlet conical section 101 gradually increases from the flue gas inlet to the intermediate section. Here, the outer casing 100 also has an outlet conical section 103 fixedly connected to one end of the intermediate section 102 opposite to the inlet conical section 101.

[0033] The flow guide layer 200, the mixing layer 300 and the stabilizing layer 400 are all fixed to the inlet conical section 101 of the outer shell 100 and are arranged sequentially from the flue gas flow direction, that is, from the flue gas inlet k1 to the middle section 102.

[0034] The flow guide layer 200 in the rectifier electrostatic precipitator may include a plurality of airfoil-shaped flow guide elements 201 arranged in a vertical array. For example, the airfoil-shaped flow guide elements 201 may be structures made of carbon steel, without specific limitations. The two ends of the airfoil-shaped flow guide elements 201 in the horizontal direction may be fixedly connected to the outer shell 100 by means of welding or other methods.

[0035] The mixing layer 300 may include a mixing plate 301 and multiple sets of grid holes 302 arranged parallel to each other along a preset direction on the mixing plate 301. Each set of grid holes 302 consists of multiple grid holes arranged in an array perpendicular to the preset direction, with the grid holes in adjacent sets of grid holes 302 arranged alternately. Here, the preset direction can be a vertical direction, and each set of grid holes consists of multiple grid holes arranged in an array perpendicular to the preset direction, i.e., a horizontal direction. For example, the mixing plate 301 may be a structure made of carbon steel, without specific limitations. The two ends of the mixing plate 301 along the horizontal direction can be fixedly connected to the outer shell 100 by welding or other means.

[0036] The stabilizing layer 400 may include a honeycomb core panel 401, which contains a plurality of honeycomb core holes 401a, with each honeycomb core 401a having an opening facing the mixing plate 301. Here, the aforementioned vertical and horizontal directions are perpendicular to each other and both perpendicular to the flue gas inlet direction. In this embodiment, the surfaces of both the mixing plate 301 and the honeycomb core panel 401 are parallel to the plane where the flue gas inlet k1 is located. Optionally, the honeycomb core panel 401 may be a single piece or multiple pieces. When the number of honeycomb core panels includes multiple panels, they can be arranged closely along the vertical direction, and adjacent honeycomb core panels can be connected by welding or screws; no specific limitation is made here. For example, the honeycomb core panel 401 may be a structure made of carbon steel; no specific limitation is made here. The two ends of the honeycomb core panel 401 along the horizontal direction can be fixedly connected to the outer shell 100 by welding or other means.

[0037] In this embodiment, a guide layer 200, a mixing layer 300, and a stabilizing layer 400 are sequentially arranged in the inlet conical section 101 of the outer shell 100. Multiple airfoil-shaped guide elements 201 in the guide layer 200 evenly distribute the airflow, guiding it across the entire inlet conical section cross-section. Multiple sets of perforated grids in the mixing layer 300 employ a staggered grid design to break up large-scale eddies in the flue gas guided by the guide layer 200, reducing large eddies to smaller ones and achieving initial velocity equilibrium. The stabilizing layer 400 features a honeycomb perforated design; the honeycomb structure effectively manages the airflow and stabilizes the velocity. Thus, the flue gas undergoes a three-stage process of "guidance-breaking-management" to achieve refined flow field processing, improve velocity distribution uniformity, and reduce inlet local resistance.

[0038] In summary, this application provides a rectifying electrostatic precipitator, which may include: a shell, a guide layer, a mixing layer, and a stabilizing layer. The guide layer, mixing layer, and stabilizing layer are sequentially arranged in the inlet conical section of the shell. Multiple airfoil-shaped guide elements in the guide layer evenly distribute the airflow, directing it across the entire inlet conical section of the shell. Multiple sets of grid holes in the mixing layer employ a staggered grid design to break up large-scale eddies in the flue gas guided by the guide layer, reducing them to smaller sizes and achieving initial velocity equilibrium. The stabilizing layer features a honeycomb open-cell design; the honeycomb structure effectively manages the airflow and stabilizes the velocity. Thus, the flue gas undergoes a three-stage process of "guidance-breakup-management" to achieve refined flow field processing, improve velocity distribution uniformity, and reduce inlet local resistance.

[0039] For example, the airfoil-shaped guide includes two opposite ends: a leading edge end Y1 and a trailing edge end Y2, wherein both the leading edge end Y1 and the trailing edge end Y2 are tapered, and the leading edge end Y1 points in the inlet direction of the housing 100, while the trailing edge end Y2 points in the direction away from the housing 100.

[0040] The leading edge Y1 of each airfoil-shaped guide 201 faces the opening of the inlet cone section 101. The leading edge Y1 of each airfoil-shaped guide 201 is smooth, and the trailing edge Y2 is sharp, that is, the angle of the leading edge Y1 is greater than the angle of the trailing edge Y2. In this way, multiple airfoil-shaped guides 201 can effectively achieve uniform distribution of airflow.

[0041] Optionally, the airfoil curved guide 201 is a mirror-symmetric structure, wherein the mirror is parallel to or perpendicular to the horizontal plane.

[0042] Optionally, the airfoil curved surface guide 201 is a rotationally symmetric structure, wherein the axis of rotational symmetry is parallel to or perpendicular to the central axis of the flue gas casing and the plane where the flue gas inlet is located, and the cross-sectional shape of the airfoil curved surface guide 201 is the same in any direction passing through the axis of rotational symmetry, and the airflow consistency is satisfied in any direction.

[0043] Optionally, the shape and profile of the multiple airfoil curved guides 201 parallel to the cross-section of the flue gas inlet k1 are arc-shaped.

[0044] Optionally, multiple airfoil-shaped guide elements 201 are arranged in parallel, with the connecting axis between the leading edge end Y1 and the trailing edge end Y2 perpendicular to the plane where the flue gas inlet k1 is located. More preferably, the airfoil-shaped guide elements 201 distributed on the two outermost edges are inclined, cooperating with the inclined arrangement of the inlet cone section 101 to ensure uniform distribution of airflow, eliminate the low-speed stagnation zone in the corner area between the outer shell wall and the guide elements, and prevent dust from accumulating there.

[0045] Optionally, here, multiple honeycomb core holes 401a on the honeycomb core panel 401 are evenly distributed, which can more effectively manage airflow and stabilize flow velocity. For example... Figure 5 As shown, the inner boundary of each honeycomb core hole 401a is projected onto the plane of the stabilizing layer 400 in a hexagonal shape. In this way, the honeycomb structure formed by the multiple honeycomb core holes 401a in the stabilizing layer 400 arranged in a uniformly surrounding manner (e.g., 6 holes) can effectively manage the flue gas flow and stabilize the flow velocity.

[0046] In the embodiments of this application, such as Figure 4 As shown, the multiple sets of grid holes 302 include: alternating first and second opening groups. The first opening group includes a plurality of first openings k2 arranged in a horizontal array facing the guide layer 200, and the second opening group includes a plurality of second openings k3 arranged in a horizontal array facing the guide layer 200. The first openings k2 and second openings k3 in adjacent first and second opening groups are staggered. In this case, the first and second opening groups in the mixing layer 300 adopt a staggered grid design to disperse large-scale eddies in the flue gas guided by the guide layer 200, reducing large eddies to smaller ones and achieving initial velocity equilibrium. Here, each first opening k2 is a strip-shaped hole extending in the vertical direction; each second opening k3 is a strip-shaped hole extending in the vertical direction. For example, the plurality of first openings k2 are equally spaced in the horizontal direction, and the plurality of second openings k3 are equally spaced in the horizontal direction. Here, the lengths of the multiple first openings k2 can all be the same, and the widths of the multiple first openings k2 can all be the same; the lengths of the multiple second openings k3 can all be the same, and the widths of the multiple second openings k3 can all be the same.

[0047] Optional, please refer to Figure 6 and Figure 7 , Figure 6 This is a partial structural diagram of a shell provided in an embodiment of this application. Figure 7 yes Figure 6 A structural schematic diagram from another perspective. Multiple protruding structures T are provided on the inner wall of the outer casing 100. By creating protruding surface structures on the smooth casing wall, the internal structure of the boundary layer is disrupted, preventing the formation of wall-attached flow, thereby stabilizing the flow field, reducing system resistance, and ultimately improving the dust collector's dust removal efficiency and ensuring stable and reliable operation. For example, the multiple protruding structures T can be fixed to the inner wall of the casing by welding, forging, or detachable connection.

[0048] In this application, as Figure 1 and Figure 2As shown, the rectifier electrostatic precipitator includes: at least one set of dust collection plates arranged in an array along the flue gas propagation direction in the intermediate section 102, each set of dust collection plates including multiple dust collection plates 500 arranged in multiple columns along the horizontal direction.

[0049] For example, please refer to Figure 2 , Figures 8 to 12 , Figure 8 This is a schematic diagram of the structure of a dust collection electrode plate provided in an embodiment of this application. Figure 9 This is a top view of a dust collecting electrode plate provided in an embodiment of this application. Figure 10 This is a partial structural schematic diagram of a dust collection electrode plate provided in an embodiment of this application. Figure 11 This is a schematic diagram of the deployed arc-shaped fairing provided in an embodiment of this application. Figure 12 This is a schematic diagram of the installation of a dust collecting electrode plate and a cathode wire according to an embodiment of this application. Each dust collecting electrode plate 500 may include: a dust collecting component 501 and a rectifier component 502.

[0050] The dust collection component 501 in the rectifier dust collection plate for dust removal has two dust collection surfaces m1 arranged perpendicular to the flue gas flow direction on both sides.

[0051] The rectifier 502 in the rectifier dust collection plate can be fixed to one end of the dust collection component 501 on the windward side. The inner wall of the rectifier 502 can form a flue gas rectifier cavity Q. The outer wall of the rectifier 502 includes a windward surface m2 and two side surfaces m4 disposed between the windward surface m2 and the two dust collection surfaces m1. The two side surfaces m4 and the two dust collection surfaces m1 can correspond one-to-one. The two side surfaces m4 are arranged opposite to each other and are respectively connected to the windward surface m2 and the corresponding dust collection surface m1. The windward surface m2 is a first arc-shaped convex surface.

[0052] Here, the rectifier-type dust collection plate for dust removal is equipped with two rectifiers 502, which are distributed at two opposite ends of the dust collection component 501 along the flue gas flow direction. In this way, the rectifier-type dust collection plate is similar to two elongated water droplets cross-linked together, with the windward and leeward sides serving as the heads of the water droplets (similar to the function of windproof hooks). The dust collection plate can be used alternately at both ends, improving the installation flexibility of the dust collection plate and increasing its service life.

[0053] The rectifier 502 is provided with at least one inlet hole k4 located on the windward side m2 and connected to the flue gas rectifier cavity Q, and at least one outlet hole k5 located on at least one side m4 and connected to the flue gas rectifier cavity Q.

[0054] The working principle of the rectifier dust collection plate for dust removal is as follows: At the end of the dust collection component, a rectifier 502 with a first arc-shaped convex surface m2 is used to replace the traditional flat windproof hook. The head of the rectifier 502 is similar to the head of a water droplet, which guides the dust flow into the electric field to achieve charging and be captured by the plate. In order to avoid the jet problem caused by excessive local wind speed due to high wind speed and uneven airflow at the front end, several inlet holes are designed on the windward side of the rectifier. Some of the flue gas enters the interior of the rectifier through the inlet holes facing the airflow, and after being rectified by the flue gas rectification chamber, it flows out through the side drain hole. The speed is reduced to form a buffer airflow. The escaped dust flow also enters the electric field to achieve charging and be captured by the plate, which increases the dust collection efficiency of the dust collection component to a certain extent.

[0055] In this embodiment, the head of the rectifier 502 in the rectifier-type dust collector plate resembles a water droplet (similar to a windproof hook function). The windward surface m2 of the rectifier 502 at the end of the dust collector 501 adopts a first arc-shaped convex surface, allowing the flue gas to flow smoothly through this area without forming turbulence or eddies. Secondly, under the guiding effect of the arc-shaped rectifier at the head, the flue gas enters the electric field smoothly without affecting the surface of the rear electrode plate. Several inlet holes k4 are designed on the windward surface m2 of the rectifier 502. Some flue gas enters the flue gas rectification cavity Q through the inlet holes k4 facing the airflow, and after rectification by the flue gas rectification cavity Q, flows out through the side outlet holes k5. This avoids the jet problem caused by excessively high local wind speeds due to high wind speeds and uneven airflow at the front end. The reduced flue gas velocity forms a buffered airflow, and the escaped dust also enters the electric field to become charged and is captured by the electrode plate.

[0056] Optionally, the rectifier 502 may include a rectifier 21 and a dust-proof plate 22 connected to each other, with the dust-proof plate 22 distributed between the rectifier 21 and the dust collector 501. A flue gas rectification cavity Q is formed between the rectifier 21 and the dust-proof plate 22. The rectifier 21 has a windward surface m2 and two side surfaces m4. The dust-proof plate 22 is connected between the two side surfaces m4, and the side of the dust-proof plate 22 facing the rectifier 21 has a second arc-shaped convex surface m3. Thus, the rectifier 21 with its windward surface m2 and the dust-proof plate 22 form the flue gas rectification cavity Q. The second arc-shaped convex surface m3 of the dust-proof plate 22 can rectify the flue gas entering the rectification cavity before it flows out through the vent hole k5. The flue gas velocity decreases, forming a buffered airflow. The escaped dust also enters the electric field, becomes charged, and is captured by the electrode plates.

[0057] Here, the dust collection surface m1 of the dust collection component 501, the plate surface of the dust separator 22, and the plate surface of the shroud 21 can all extend vertically and have the same height in the vertical direction.

[0058] For example, the fairing 21 may include: an arc-shaped fairing body 211 with a first arc-shaped convex surface and two inclined plates 212, each inclined plate 212 having a side surface m4, and the two sides of the two inclined plates 212 being fixedly connected to the arc-shaped fairing body 211 and two dust collection surfaces m1, respectively. The arc-shaped fairing body 211 has an inlet hole k4, and the two inclined plates 212 have outlet holes k5 on their respective sides. Here, the arc-shaped fairing body 211 is an arc-shaped plate, and the arc-shaped fairing body 211, the inclined plates 212, and the dust-collecting plates 22 can be an integral structure.

[0059] In the embodiments of this application, such as Figure 8 and Figure 9 As shown, both the first arc-shaped convex surface m2 in the hood 21 and the second arc-shaped convex surface m3 in the dustproof plate 22 can be arc surfaces, and the radius of the first arc-shaped convex surface m2 is larger than the radius of the second arc-shaped convex surface m3. For example, the radius of the first arc-shaped convex surface m2 in the arc-shaped hood 21 is R1, and the radius of the second arc-shaped convex surface m3 in the dustproof plate 22 is R2. The value range of the radius R2 of the second arc-shaped convex surface m3 is (R1-5) mm to (R1-2) mm. The positioning dimension L1 of the dustproof plate 22 can be the horizontal distance between the side of the dustproof plate 22 and the apex of the arc-shaped hood 21. It should be noted that the larger the flue gas velocity and the poorer the uniformity, the larger the value of R1.

[0060] In this application, both sides m4 of the fairing 21 can be provided with vent holes k5, and the vent holes k5 on each side m4 are inclined toward the corresponding dust collection surface m1. That is, the outlet of the vent hole k5 is more inclined toward the dust collection surface m1 than the inlet of the vent hole k5.

[0061] Optional, please refer to Figure 8 and Figure 11 The multiple inlet holes k4 are arranged symmetrically in two groups relative to the central axis of the fairing. Each group of inlet holes k4 includes at least one row of inlet holes arranged along the circumferential direction of the windward surface m2. Each row of inlet holes k4 includes multiple inlet holes k4 arranged in an array along the height direction of the fairing 21. Here, each inlet hole k4 is a strip-shaped hole extending along the height direction of the arc-shaped fairing 21. For example, the strip-shaped hole can be an elliptical hole or a waist-shaped hole. Here, the hole spacing L2 between two adjacent rows of inlet holes k4 is L2 = π*R1 / (B+1), where B is the number of rows of inlet holes.

[0062] Multiple vent holes k5 are arranged in two sets of vent holes symmetrically on the two sides m4 of the fairing 21. Each set of vent holes contains a row of inlet holes, and each row of vent holes k5 contains multiple vent holes arranged in an array along the height direction of the fairing 21.

[0063] For example, the width of the inlet hole k4 in the rectifier dust collector plate is L3, and the width of the outlet hole k5 is L4, where L4 = B / 2 × L3, and B is the number of rows of inlet holes k4. This effectively ensures the consistency of the airflow rate in and out of the rectifier dust collector plate. Here, the higher the flue gas velocity and the worse the uniformity, the larger the value of L3.

[0064] Optionally, the dust collection component 501 includes two dust collection plates B arranged opposite each other in a direction perpendicular to the flue gas flow direction, with the sides of the two dust collection plates B respectively fixedly connected to the two sides m4 of the hood 21. The side of one dust collection plate B facing away from the other dust collection plate B is the dust collection surface m1.

[0065] In this embodiment, the dust collection surfaces m1 of both dust collection plates B can be concave arc surfaces. The dust collection surface of the anode curved dust collection plate is a streamlined concave arc surface, with the concave direction away from the cathode line Y direction. Through the above setting, the airflow will not scour the anode plate surface, and the dust resting zone (i.e., the dust flow velocity in this area is slowed down) is increased, which can effectively prevent the peeling dust and secondary dust from vibration caused by the airflow scouring the electrode plate. Compared with the traditional plate anode plate, this type of anode plate increases the dust collection area (the arc plate surface increases it by about 15%), and because the dust collection surface is curved, similar to the circular tube discharge effect, the plate current density uniformity is better, and the charging and dust collection effects are better.

[0066] In this way, rectifiers replace the traditional flat windproof hooks at both ends of the dust collection plate. The arc-shaped rectifier 21, similar to the head of a water droplet, guides the dust flow into the electric field to achieve charging and be captured by the electrode plates. To avoid jet problems caused by excessively high local wind speeds due to high wind speeds and uneven airflow at the front end, several vertically arranged inlet holes k4 are designed on the windward side of the arc-shaped rectifier 21. Some flue gas enters the interior of the arc-shaped rectifier 21 through the inlet holes k4 facing the airflow, and after being rectified by the dust-proof plate 22, it flows out through the side outlet holes k5. The escaped dust flow also enters the electric field to achieve charging and be captured by the electrode plates. In addition, the dust collection surface of the anode plate is a streamlined curved surface, and the concave direction of the curved surface is away from the cathode line. Through the above measures, the dust-laden airflow entering the electrostatic precipitator can be effectively guided, reducing its flow velocity on the curved surface and avoiding the direct impact of high-speed airflow on the electrode plates, thereby significantly extending the service life of the electrode plates and suppressing secondary dust. In addition, the curved dust collection plate adopts a curved design, and its dust collection surface is a concave arc surface. Compared with the plate dust collection electrode, the dust collection area is effectively increased, the field strength in each area of ​​the electrode plate is basically the same, the uniformity of plate current density is not much, the dust collection capacity is greatly enhanced, and the stability and efficiency of the dust removal process are ensured.

[0067] Furthermore, in terms of rapping force transmission, flat dust collection plates primarily use linear paths, resulting in rapid force attenuation during transmission and energy concentration mainly in the vicinity of the rapping point, exhibiting a significant localization effect. In contrast, the curved structure in this application possesses a natural thin-film effect, with rapping force transmission primarily occurring within the surface. When the rapping force is applied to the curved surface, most of it is converted into thin-film stress acting within the surface. This thin-film stress diffuses and transmits relatively uniformly along the entire surface, efficiently distributing the load to the boundaries of the entire structure, achieving a distributed path and exhibiting a global effect. The force distribution is wider, while the stress and deformation in local areas (impact points) are relatively smaller. The entire structure has a stronger capacity to bear the load collectively and is more sensitive to rapping impacts.

[0068] Optional, such as Figure 2 and Figure 3 As shown, the concave arc surface m1 in both curved dust collection plates B can be a circular arc surface, and the curvature of the two circular arc surfaces is the same. For example, the radius of the concave arc surface m1 in the curved dust collection plate B is R3. In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0069] The above description is merely an optional embodiment of this application and is not intended to limit this application. 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 rectifier-type electrostatic precipitator, characterized in that, include: Outer shell, flow guide layer, mixing layer, and stabilizing layer; The outer shell has an inlet conical section; The flow guiding layer, mixing layer and stabilizing layer are all fixed in the inlet conical section and are arranged sequentially from the flue gas flow direction; The flow guide layer includes: a plurality of airfoil-shaped curved surface flow guides arranged in a vertical array; The mixing layer includes: a mixing plate, wherein the mixing plate is provided with multiple sets of grid holes arranged in parallel along a preset direction, and each set of grid holes has multiple grid holes arranged in an array along a direction perpendicular to the preset direction, and the grid holes in adjacent sets of grid holes are arranged alternately. The stabilizing layer includes a honeycomb core board with multiple honeycomb core holes, and the opening of each honeycomb core hole faces the mixing plate.

2. The rectifier-type electrostatic precipitator according to claim 1, characterized in that, The airfoil-shaped guide has a leading edge end and a trailing edge end that are arranged opposite to each other. The included angle of the leading edge end is greater than the included angle of the trailing edge end, wherein the leading edge end faces the opening of the inlet cone section.

3. The rectifier-type electrostatic precipitator according to claim 1, characterized in that, The honeycomb core board has multiple honeycomb core holes that are evenly distributed.

4. The rectifier-type electrostatic precipitator according to claim 1, characterized in that, The multiple sets of grid holes include: a first set of openings and a second set of openings arranged alternately in the vertical direction. The first set of openings includes a plurality of first openings arranged in a horizontal array and facing the flow guide layer. The second set of openings includes a plurality of second openings arranged in a horizontal array and facing the flow guide layer. The first openings and second openings in adjacent first sets of openings and second sets of openings are arranged alternately.

5. The rectifier-type electrostatic precipitator according to claim 1, characterized in that, The inner wall of the outer casing is provided with multiple protrusion structures.

6. The rectifier-type electrostatic precipitator according to any one of claims 1-5, characterized in that, The outer casing has a middle section connected to the inlet conical section; The rectifier electrostatic precipitator includes at least one set of dust collection plates arranged in an array along the direction of flue gas propagation within the intermediate section, each set of dust collection plates comprising multiple dust collection plates arranged in a horizontal direction.

7. The rectifier-type electrostatic precipitator according to claim 6, characterized in that, Each of the dust collection plates includes: a dust collection component and a rectifier component; The dust collection component has two dust collection surfaces arranged perpendicular to the direction of flue gas flow on both sides. The rectifier is fixed to one end of the dust collector on the windward side. The inner wall of the rectifier forms a flue gas rectifier cavity. The outer wall of the rectifier includes a windward surface and two side surfaces disposed between the windward surface and the two dust collector surfaces. The two side surfaces are arranged opposite to each other and are respectively connected to the windward surface and the corresponding dust collector surface. The windward surface is a first arc-shaped convex surface. The rectifier is provided with at least one inlet hole distributed on the windward side and communicating with the flue gas rectifier cavity, and at least one outlet hole distributed on at least one side and communicating with the flue gas rectifier cavity.

8. The rectifier-type electrostatic precipitator according to claim 7, characterized in that, The rectifier includes: a rectifier hood and a dust filter plate connected to each other, wherein the dust filter plate is distributed between the rectifier hood and the dust collection component; The flue gas rectifier cavity is formed between the hood and the dustproof plate; the hood is provided with the windward side and two side sides, and the dustproof plate is connected between the two side sides; the side of the dustproof plate facing the hood is a second arc-shaped convex surface.

9. The rectifier-type electrostatic precipitator according to claim 8, characterized in that, Both the first and second arc-shaped convex surfaces are circular arc surfaces, and the radius of the first arc-shaped convex surface is greater than the radius of the second arc-shaped convex surface.

10. The rectifier-type electrostatic precipitator according to claim 9, characterized in that, The radius of the first arc-shaped convex surface is R1, and the radius of the second arc-shaped convex surface is R2. The value range of the radius R2 of the second arc-shaped convex surface is (R1-5) mm to (R1-2) mm.

11. The rectifier-type electrostatic precipitator according to claim 8, characterized in that, Both sides are provided with drainage holes, and the drainage holes on each side are inclined toward the corresponding dust collection surface.

12. The rectifier-type electrostatic precipitator according to claim 8, characterized in that, The dust collection component includes two dust collection plates arranged opposite each other in a direction perpendicular to the flue gas flow direction, with the sides of the two dust collection plates fixedly connected to the two side surfaces respectively; wherein, the side of one dust collection plate facing away from the other dust collection plate is the dust collection surface.

13. The rectifier-type electrostatic precipitator according to claim 12, characterized in that, The dust collection surfaces of both dust collection plates are concave arc surfaces.

14. The rectifier-type electrostatic precipitator according to claim 13, characterized in that, Both concave arc surfaces are circular arc surfaces, and the curvature of the two circular arc surfaces is the same.

Images