A dust collector

Abstract

The application provides a dust remover which can improve dust removal efficiency. The dust remover comprises an inlet part having an inlet and an outlet, the direction from the inlet to the outlet is a first direction, a plurality of airflow distribution plates are distributed in the inlet part along the first direction, and the airflow distribution plates are provided with a plurality of through holes; the airflow distribution plate is a wave-shaped plate, the wave-shaped plate comprises alternating wave peak portions and wave valley portions, the wave-shaped plate further comprises a slope portion, adjacent wave peak portions and wave valley portions are connected through the slope portion, and the through holes are arranged at positions of the wave-shaped plate other than the wave peak portions and the wave valley portions.

Description

Technical Field

[0001] This application relates to the field of dust removal technology, specifically to a dust collector. Background Technology

[0002] The dust collector has an inlet horn with an airflow distribution plate inside. This plate has through-holes to ensure uniform flow of flue gas before it enters the dust collector's electric field. However, as the flue gas passes through the airflow distribution plate, the side velocity is low or even zero, while the velocity in the center can reach 4 m / s. The average velocity of the flue gas exiting the airflow distribution plate ranges from 2 to 4 m / s. This indicates that the airflow distribution plate is ineffective at diffusing the airflow. The flue gas has a short residence time in the pre-stage electric field of the dust collector, and dust particles enter the next stage electric field before they are fully charged, resulting in wasted dust collection area in the pre-stage electric field and affecting dust collection efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a dust collector that can improve dust removal efficiency.

[0004] To solve the above-mentioned technical problems, this application provides a dust collector, including an inlet section having an inlet and an outlet, the direction from the inlet to the outlet being a first direction, a plurality of airflow distribution plates distributed along the first direction within the inlet section, the airflow distribution plates being provided with a plurality of through holes; the airflow distribution plates are corrugated plates, the corrugated plates including alternately arranged crests and troughs, the corrugated plates also including slopes, adjacent crests and troughs being connected through the slopes, the airflow distribution plates being provided with the through holes in locations other than the crests and troughs.

[0005] Optionally, in two adjacent airflow distribution plates, along the first direction, the crest of one plate corresponds to the trough of the other.

[0006] Optionally, the through hole is elliptical or circular.

[0007] Optionally, the crest portion is a first flat plate, the trough portion is a second flat plate, the first flat plate and the second flat plate are parallel to each other, and the slope portion is a third flat plate, which is inclined relative to the first flat plate and the second flat plate.

[0008] Optionally, the airflow distribution plate includes multiple distribution plate units, each distribution plate unit including at least two slope sections and at least one crest section or at least one trough section. Both sides of the distribution plate unit are slope sections, one end of each slope section is connected to the trough section or the crest section, and the other end is connected to a connecting plate. The length of the connecting plate is half the length of the first straight plate or the second straight plate.

[0009] Multiple uniform distribution plate units are sequentially connected along a second direction to form the airflow uniform distribution plate. The first direction and the second direction are perpendicular. The connecting plates of two adjacent uniform distribution plate units are joined together to form a first flat plate or a second flat plate.

[0010] Optionally, the crest, the trough, and the slope are all curved panels.

[0011] Optionally, a cathode wire is also arranged inside the inlet section, and the cathode wire and the airflow distribution plate are distributed along the first direction.

[0012] Optionally, the inlet is an inlet horn with a flow cross-sectional dimension that gradually increases from the inlet to the outlet; the cathode wire is provided on at least one of the front and rear sides of the downstream airflow distribution plate.

[0013] Optionally, the cathode wire is equipped with an insulator, and the dust collector further includes a heat preservation device for the insulator, the heat preservation device being located inside the inlet.

[0014] Optionally, the dust collector further includes a power controller and / or a rapping device, the power controller being used to supply power to the cathode wire, and the rapping device being used to clean the airflow distribution plate and the cathode frame on which the cathode wire is mounted.

[0015] This application employs a wave-shaped airflow distribution plate. When airflow passes through the plate, a slope flow effect is created. Upon contact with the crests, which lack through-holes, the airflow flows to both sides, diffusing along the sloping surface between the crests and troughs. The change in path and direction due to the slope effect allows the airflow to gradually decrease in velocity and concentration after passing through multiple distribution plates, achieving uniform diffusion. Finally, the airflow exits from the inlet and reaches the inlet section of the electrostatic precipitator's dust removal zone, where airflow uniformity is improved and velocity is reduced. Because the airflow enters the electrostatic precipitator zone more slowly and evenly, dust particles can remain in the downstream zone for a longer period, allowing for more efficient charging and collection within the preceding electric field, reducing wasted space and improving dust removal efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dust collector in the embodiments of this application;

[0017] Figure 2 for Figure 1 Top view of the inlet horn of the medium dust collector;

[0018] Figure 3for Figure 2 Left view of the airflow distribution plate;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure of a uniform distribution plate unit of the airflow uniform distribution plate;

[0020] Figure 5 For two Figure 4 A schematic diagram of the structure connecting the uniformly distributed plate units;

[0021] Figure 6 This is a schematic diagram of another uniformly distributed plate unit in an embodiment of this application;

[0022] Figure 7 for Figure 1 The schematic diagram of the structure with cathode wires in the middle only shows the downstream airflow distribution plate;

[0023] Figure 8 for Figure 1 A schematic diagram of a structure in which cathode wires are arranged on both sides of a uniformly distributed airflow plate, with the electric field indicated by dashed lines.

[0024] The annotations in the attached figures are explained as follows:

[0025] 100 - Import Department;

[0026] 200 - Airflow distribution plate; 200a - Through hole; 201 - Distribution plate unit; 2011 - Wave crest; 2012 - Wave trough; 2013 - Slope section; 201a - Connecting plate;

[0027] 301 - Cathode wire; 302 - Cathode frame;

[0028] 400 - Housing;

[0029] 500-ash bucket;

[0030] 600-Power Controller;

[0031] 700-Insulation Device

[0032] 800-Vibration device. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the embodiments of this application, the terms "first", "second", and "third" are used only to distinguish components with the same or similar structure, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0035] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the dust collector in the embodiments of this application; Figure 2 for Figure 1 A top view of the inlet section 100 of the dust collector.

[0036] The dust collector in this embodiment can be an electrostatic precipitator with an electric field dust removal zone (not shown in the figure), or a composite dust collector including an electric field dust removal zone, such as an electrostatic precipitator-bag filter composite dust collector. The electric field dust removal zone generally includes a cathode device and an anode plate. The dust in the airflow is charged under the action of the cathode device and moves towards the anode plate under the action of the electric field force of the electric field dust removal zone, thereby being captured by the anode plate. The airflow is, for example, flue gas, but it can also be other airflows that include dust. Figure 1 In the process, the dust collector includes a housing 400, and an electric field dust removal zone is arranged inside the housing 400. The electric field dust removal zone can have multiple electric fields arranged in sequence. Dust in the airflow can pass through multiple electric fields in sequence to be gradually removed. The electric field located at the uppermost position is the front electric field of the electric field dust removal zone.

[0037] An inlet 100 is provided on one side of the housing 400. The inlet 100 is used to guide the airflow to be dusted into the electric field dust removal zone inside the housing 400. In this embodiment, the inlet 100 is specifically an inlet horn. In this case, the flow cross-sectional size of the inlet 100 gradually increases towards the housing 400, that is, along the direction of flue gas flow, the flow cross-sectional size of the inlet 100 gradually increases. This facilitates the smooth introduction of airflow into the electric field dust removal zone of the housing 400.

[0038] The inlet section 100 has an inlet and an outlet. Airflow enters from the inlet, exits from the outlet, and enters the interior of the dust collector housing 400 for dust removal. In this embodiment, the direction from the inlet to the outlet of the inlet section 100 is defined as the first direction, such as... Figure 2 As shown, the first direction is also the direction of airflow. The first direction is generally set as a straight line, that is, the inlet 100 extends in a straight line. Of course, the inlet 100 can also be set to include a bend, in which case the first direction can also be a bend.

[0039] In this embodiment, the inlet 100 has multiple airflow distribution plates 200 distributed along the first direction. Obviously, the airflow distribution plates 200 are perpendicular to the first direction, and the airflow needs to pass through multiple airflow distribution plates 200 sequentially. Multiple airflow distribution plates 200 refer to a minimum number of two. To allow airflow to pass through, the airflow distribution plates 200 are provided with multiple through holes 200a, which are relatively evenly distributed within the airflow distribution plates 200. Figure 3 As shown, after the airflow passes through the airflow distribution plate 200 in sequence, the airflow will be relatively uniform when it flows out from the inlet 100.

[0040] It is worth noting that the airflow distribution plate 200 in this embodiment is a corrugated plate, which includes multiple alternating crests 2011 and troughs 2012. The airflow distribution plate 200 has a front side and a rear side along a first direction, with the side facing the airflow being the front side and the side facing away being the rear side. Part of the airflow distribution plate 200 protrudes forward and part protrudes backward, thereby forming a corrugated plate with alternating crests 2011 and troughs 2012. The crest 2011 refers to the top of the airflow distribution plate 200 protruding forward, and the trough 2012 refers to the top of the airflow distribution plate 200 protruding backward. The part connecting adjacent crests 2011 and troughs 2012 is the slope surface 2013 of the airflow distribution plate 200, which is inclined relative to the crests 2011 and troughs 2012. Furthermore, in this embodiment, the airflow distribution plate 200 has multiple through holes 200a in areas other than the crests 2011 and troughs 2012; that is, the crests 2011 and troughs 2012 do not have through holes 200a, while the through holes 200a are located on the slope surface 2013, which can be combined with... Figure 3 understand.

[0041] In this embodiment, a wave-shaped airflow distribution plate 200 is provided. When the airflow passes through the airflow distribution plate 200, a slope flow effect is formed. That is, when the airflow comes into contact with the crest 2011, since the crest 2011 does not have through holes 200a, the airflow will flow to both sides of the crest 2011 and diffuse along the inclined slope 2013 between the crest 2011 and the trough 2012. It can be seen that the airflow changes its path and direction under the action of the slope. After the airflow passes through multiple airflow distribution plates 200 in sequence, the flow velocity and concentration distribution will be reduced layer by layer to achieve the purpose of uniform flow diffusion. Finally, it flows out from the outlet of the inlet 100. When it reaches the inlet section of the electric field dust removal zone of the dust collector, the airflow is relatively uniformly distributed and the airflow velocity is reduced. Since the airflow can enter the electric field dust removal zone more slowly and evenly, the dust can stay in the downstream electric field dust removal zone for a longer time. It can be charged and captured relatively fully in the front electric field of the electric field dust removal zone, reducing the waste of integrated area and improving dust removal efficiency. Moreover, the airflow distribution plate 200 with through holes 200a is not easy to be blocked.

[0042] In addition, when the airflow passes through the through holes 200a of the airflow distribution plate 200, it will generate a brief local acceleration. Under the action of local acceleration, the dust particles in the airflow will collide, which will accelerate the agglomeration and adsorption between the dust particles to form large particles, making them easier to gain charge under the action of the electric field of the dust removal zone of the dust collector and thus be captured.

[0043] As can be seen, in this embodiment, after the airflow passes through the multi-layer airflow distribution plate 200, it is diffused and decelerated on the overall slope and then locally accelerated briefly after passing through the through hole 200a, so that the airflow can diffuse evenly and have a stable flow velocity before entering the electric field dust removal zone and when it reaches the inlet section of the electric field dust removal zone.

[0044] You can continue to refer to this. Figure 2 In some embodiments, along the first direction, the crests 2011 of two adjacent airflow distribution plates 200 correspond to the troughs 2012 of the other, that is, the crests 2011 of two adjacent airflow distribution plates 200 are staggered. Figure 2 The dashed lines correspond to the crests 2011 and troughs 2012 of the airflow distribution plate 200. In this way, multiple crests 2011 and troughs 2012 will alternate along the first direction. When the airflow passes through one airflow distribution plate 200, the guiding direction of the crests 2011 and troughs 2012 of the downstream airflow distribution plate 200 is different from that of the airflow distribution plate 200, thereby further enhancing the diffusion and deceleration effect of the airflow distribution plate 200.

[0045] like Figure 3 As shown, Figure 3 for Figure 2 Left view of the airflow distribution plate 200.

[0046] In some embodiments, the through holes 200a provided on the airflow distribution plate 200 can be elliptical or circular. Elliptical or circular holes cause relatively little disturbance to the airflow, which is conducive to the smooth forward flow of the airflow. The opening ratio of the airflow distribution plate 200 can be set according to the actual working conditions and the CFD (Computational Fluid Dynamics) simulation results of the airflow. For example, it can be set in the range of 30% to 50%, that is, the ratio of the area of ​​the through holes 200a to the total area of ​​the airflow distribution plate 200 is 30% to 50%.

[0047] You can continue to refer to this. Figure 4 and Figure 5 , Figure 4 for Figure 2 A schematic diagram of the structure of a uniform distribution plate unit 201 of the airflow uniform distribution plate 200; Figure 5 For two Figure 4 A schematic diagram of the structure of the uniformly distributed plate unit 201.

[0048] In some embodiments, the crest portion 2011 of the airflow distribution plate 200 is a first flat plate, the trough portion 2012 is a second flat plate, the first flat plate and the second flat plate are parallel to each other, and the slope portion 2013 between the crest portion 2011 and the trough portion 2012 is a third flat plate. The third flat plate is inclined relative to the first flat plate and the second flat plate, and the inclination angle θ can be set to 30°~60° to achieve a better slope flow effect. Here, the crest portion 2011, the trough portion 2012 and the slope portion 2013 are all set as flat plate structures, which is easy to process.

[0049] The airflow distribution plate 200 may include a plurality of distribution plate units 201. Each distribution plate unit 201 includes at least two third straight plates and at least one first straight plate or at least one second straight plate, that is, it includes at least one crest portion 2011 or at least one trough portion 2012, and at least two slope portions 2013. Figure 4 The uniform distribution plate unit 201 includes two crests 2011, one trough 2012, and four slopes 2013. Both sides of the uniform distribution plate unit 201 are slopes 2013. One end of the slope 2013 on the side is connected to either the crest 2011 or the trough 2012, and the other end is connected to a connecting plate 201a. The length of the connecting plate 201a is half the length of the first straight plate or the second straight plate, and the lengths of the first and second straight plates are equal. Multiple uniform distribution plate units 201 are sequentially connected along the second direction to form an airflow uniform distribution plate 200. The first and second directions are perpendicular. The connecting plates 201a of two adjacent uniform distribution plate units 201 are joined to form a first straight plate or a second straight plate, i.e., joined to form a crest 2011 or a trough 2012, as shown below. Figure 5 As shown, the connection can be welding. This method of splicing multiple uniformly distributed plate units 201 to form the airflow uniformly distributed plate 200 is more conducive to processing.

[0050] It can be seen that the crest portion 2011, trough portion 2012, and slope portion 2013 of the airflow distribution plate 200 in this embodiment are all flat plates, but it is obviously not limited to this. For example Figure 6 As shown, Figure 6 This is a schematic diagram of another uniformly distributed plate unit 201 in this embodiment. In this structure, the crest portion 2011, trough portion 2012, and slope portion 2013 are all curved plates, which can also achieve airflow diffusion and uniformity relatively smoothly. That is, in this embodiment, the airflow uniformly distributed plate 200 only needs to include alternately distributed crest portions 2011 and trough portions 2012.

[0051] Please continue to combine Figure 1 and refer to Figure 7 , 8 understand, Figure 7 for Figure 1The schematic diagram of the structure with cathode wire 301 in the middle only shows the downstream airflow distribution plate 200, and also shows the ash hopper 500 below the shell 400, which is used to store the dust collected in the electric field dust removal area. Figure 8 for Figure 1 A schematic diagram of a structure in which cathode wires 301 are arranged on both the front and rear sides of an airflow distribution plate 200, with the electric field indicated by dashed lines.

[0052] In some embodiments, a cathode wire 301 is further arranged inside the inlet 100 of the dust collector, and the cathode wire 301 and the airflow distribution plate 200 are distributed along a first direction. The airflow distribution plate 200 is a metal plate, so that an electric field region can be formed between the cathode wire 301 and the airflow distribution plate 200. Figure 8 As shown, an electric field zone can be formed using the space of the inlet 100. In this configuration, the cathode wire 301 acts as the discharge electrode, and the airflow distribution plate 200 acts as the dust collection electrode. The cathode wire 301 and the airflow distribution plate 200 together form a discharge-dust collection electrode combination. With this setup, after the airflow passes through the inlet 100, some pre-charged dust particles can be captured by the airflow distribution plate 200. The remaining charged but uncaptured dust particles are immediately captured by the anode plate upon entering the electric field dust collection zone within the dust collector housing 400. Therefore, this configuration, on the one hand, makes the surface of the airflow distribution plate 200 an effective dust collection area; on the other hand, the dust particles are pre-charged in the inlet 100 and immediately captured upon entering the electric field dust collection zone of the dust collector, thereby improving the utilization rate of the existing dust collection area of ​​the dust collector and correspondingly increasing the overall dust collection efficiency.

[0053] Specifically, in this embodiment, a cathode line 301 is set downstream of the downstream airflow distribution plate 200. The upstream and downstream are defined according to the airflow direction. As mentioned earlier, the inlet 100 can be set as an inlet horn, with its flow cross-sectional size gradually increasing along the first direction. This results in the downstream airflow distribution plate 200 having the largest area, which can be set much larger than the areas of the other airflow distribution plates 200 on the front side, achieving a dust collection area equivalent to 4-5 channels in the electric field dust removal zone. In this way, the large area of ​​the downstream airflow distribution plate 200 can be utilized to equip it with a cathode line 301 that works in conjunction with the airflow distribution plate 200, forming a discharge dust collection electrode combination. This makes the surface of the airflow distribution plate 200 an effective dust collection area, improving dust collection efficiency.

[0054] like Figure 8As shown, in this embodiment, the downstream airflow distribution plate 200 is provided with cathode wires 301 on both the front and rear sides in the first direction. The airflow distribution plate 200 and the front cathode wires 301 are combined to form a front-end electric wind interception pretreatment device. The discharge tip of the front cathode wires 301 can face the rear side, that is, the front surface of the airflow distribution plate 200. The airflow distribution plate 200 and the rear cathode wires 301 are combined to form a rear-end electric wind interception pretreatment device. The discharge tip of the rear cathode wires 301 can face the front side, that is, the rear surface of the airflow distribution plate 200. The pre-treatment device for electric wind interception can rapidly charge dust particles in the airflow under high voltage. Under the combined action of electric field wind speed and ionization wind, the dust particles quickly reach the airflow distribution plate 200, reducing charge loss and being rapidly captured by the airflow distribution plate 200. In the post-treatment device for electric wind interception, the discharge tip of the cathode wire 301 can face the airflow and form an electric wind wall with reverse airflow, delaying the time for dust particles to enter the electric field dust removal zone of the dust collector, thereby making full use of this time difference to rapidly and fully charge the dust particles.

[0055] It can be seen that placing a cathode wire 301 on either the front or rear side of the downstream airflow distribution plate 200 can effectively remove dust, and placing it on both sides can achieve better results. In addition, since the downstream airflow distribution plate 200 has the largest area, placing the cathode wire 301 on the downstream airflow distribution plate 200 is also a relatively effective way to utilize the airflow distribution plate 200. It can also be understood that each airflow distribution plate 200 can be equipped with a cathode wire 301, or discharge tips can be placed on both the front and rear sides of the cathode wire 301, so that a cathode wire 301 located between two adjacent airflow distribution plates 200 can simultaneously establish an electric field with both airflow distribution plates 200.

[0056] like Figure 7 As shown, in this embodiment, the cathode wire 301 is equipped with an insulator (not shown in the figure). The dust collector may also include a heat preservation device 700 for housing the insulator. The heat preservation device 700 is located inside the inlet 100 and includes a housing with the insulator inside. The function of the heat preservation device 700 is to isolate and insulate the insulator from the airflow and the surrounding environment. An electric heater can be installed inside the housing of the heat preservation device 700 to ensure that the temperature of the insulator is always higher than the acid dew point during operation. This ensures that the insulator is not contaminated by dust and that it does not condense due to excessively low temperature, thereby preventing the insulator from creeping and losing its high-voltage insulation function.

[0057] Continue to refer to Figure 7The dust collector also includes a cathode frame 302, from which cathode wires 301 can be suspended. The cathode wires 301 can be needle-type or barbed corona wires, with the discharge tips of the cathode wires 301 parallel to the airflow direction and perpendicular to the airflow distribution plate 200. The number of cathode wires 301 can be determined based on the area of ​​the airflow distribution plate 200, for example, using a two-point suspension or multi-point suspension structure. Furthermore, the dust collector in this embodiment also includes a power controller 600 and / or a rapping device 800. The power controller 600 supplies power to the cathode wires 301 using its own power supply, while the rapping device 800 is used to clean the dust collected on the airflow distribution plate 200. This rapping device 800 can perform rapping cleaning to reduce or even avoid clogging and dust accumulation on the airflow distribution plate 200, improving equipment stability. The rapping device 800 can also rappel the cathode frame 302 of the cathode wires 301 to clean the cathode frame 302.

[0058] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A dust collector, characterized in that, The system includes an inlet section (100) having an inlet and an outlet, the direction from the inlet to the outlet being a first direction, and a plurality of airflow distribution plates (200) distributed within the inlet section (100) along the first direction, the airflow distribution plates (200) being provided with a plurality of through holes (200a); the airflow distribution plates (200) are corrugated plates, the corrugated plates including alternating crests (2011) and troughs (2012), the corrugated plates also including slopes (2013), adjacent crests (2011) and troughs (2012) being connected by the slopes (2013), the airflow distribution plates (200) being provided with the through holes (200a) in locations other than the crests (2011) and troughs (2012); in two adjacent airflow distribution plates (200), along the first direction, the crest (2011) of one corresponds to the trough (2012) of the other.

2. The dust collector according to claim 1, characterized in that, The through hole (200a) is elliptical or circular.

3. The dust collector according to any one of claims 1-2, characterized in that, The crest portion (2011) is a first flat plate, the trough portion (2012) is a second flat plate, the first flat plate and the second flat plate are parallel to each other, and the slope portion (2013) is a third flat plate, which is inclined relative to the first flat plate and the second flat plate.

4. The dust collector according to claim 3, characterized in that, The airflow distribution plate (200) includes multiple distribution plate units (201). Each distribution plate unit (201) includes at least two slope sections (2013) and at least one crest section (2011) or at least one trough section (2012). Both sides of the distribution plate unit (201) are slope sections (2013). One end of each slope section (2013) is connected to the trough section (2012) or the crest section (2011), and the other end is connected to a connecting plate (201a). The length of the connecting plate (201a) is half the length of the first straight plate or the second straight plate. Multiple uniform distribution plate units (201) are connected sequentially along a second direction to form the airflow uniform distribution plate (200). The first direction and the second direction are perpendicular. The connecting plates (201a) of two adjacent uniform distribution plate units (201) are joined to form a first flat plate or a second flat plate.

5. The dust collector according to any one of claims 1-2, characterized in that, The crest (2011), trough (2012), and slope (2013) are all curved panels.

6. The dust collector according to any one of claims 1-2, characterized in that, A cathode wire (301) is also arranged inside the inlet section (100), and the cathode wire (301) and the airflow distribution plate (200) are distributed along the first direction.

7. The dust collector according to claim 6, characterized in that, The inlet (100) is an inlet horn with a flow cross-sectional size that gradually increases from the inlet to the outlet; the cathode wire (301) is provided on at least one of the front and rear sides of the airflow distribution plate (200).

8. The dust collector according to claim 7, characterized in that, The cathode wire (301) is equipped with an insulator, and the dust collector also includes a heat preservation device (700) for the insulator, which is located inside the inlet.

9. The dust collector according to claim 8, characterized in that, The dust collector also includes a power controller (600) and / or a rapping device (800), the power controller (600) for supplying power to the cathode wire (301), and the rapping device (800) for cleaning the airflow distribution plate (200) and the cathode frame (302) on which the cathode wire (301) is mounted.

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