Streamline and flow balance type electric dust remover front flue

Abstract

The utility model discloses a streamline and flow balance type electric precipitator front flue which comprises a smoke inlet and two shunting interfaces, the two shunting interfaces are arranged at the output end of the smoke inlet, the two shunting interfaces and the smoke inlet are arranged in a Y shape, the two shunting interfaces are symmetrically arranged, the symmetry axis coincides with the center line of the smoke inlet, and the two shunting interfaces are arranged in a Y shape. A row of flow guide plates I arranged at intervals are arranged in the communicating positions of the flow dividing connectors and the smoke inlet, horizontal flow dividing pipes and inclined flow dividing pipes located on the outer sides of the horizontal flow dividing pipes are arranged at the rear ends of the flow dividing connectors, and compared with the prior art, local vortex and turbulent flow phenomena can be effectively eliminated, and the possibility of dust deposition is reduced.

Description

A streamlined and flow-balanced pre-flue of an electrostatic precipitator Technical Field

[0001] This utility model relates to the technical field of flue gas pollutant treatment and dust removal, and in particular to the technical field of a streamlined and flow-balanced electrostatic precipitator pre-flue. Background Technology

[0002] According to the industry standard "Simulation Test Method for Airflow Distribution in Electrostatic Precipitators" JB / T 7671-2017, the uniformity of airflow entering the electrostatic precipitator and the deviation of flue gas volume in each branch flue should meet the requirements, as shown in Figure 4. Most of the existing electrostatic precipitator pre-flue structures are non-streamlined, resulting in a poor flow field of flue gas within the flue, which easily generates local eddies and turbulence, leading to a large pressure drop in the flue. By adding a flow guiding device in the flue, the airflow within the flue can be guided and adjusted to improve the flow field, forcibly change the flow direction of the flue gas, and adjust the flue gas volume deviation in each branch flue.

[0003] When designing flues, multiple factors must be considered to ensure their performance, safety, and economy. If the streamlined shape of the flue structure and flue gas deviation are not taken into account during the design phase, the design of the flow guiding device will become more complicated. Even after adding the flow guiding device, local eddies and turbulence will still exist in the flow field inside the flue. Non-streamlined flue structures are prone to the following problems:

[0004] 1. It may complicate the design of the airflow guiding device, requiring a more complex airflow guide arrangement or an increase in its number to guide the airflow;

[0005] 2. It is easy to generate local eddies and turbulence, which leads to uneven airflow velocity, increased flue pressure drop, increased fan energy consumption, accelerated equipment wear, and shortened service life.

[0006] 3. Local dead zones are easily formed at bends, resulting in dust accumulation. Long-term dust accumulation may cause local blockage of the flue, affecting the normal operation of the system. Regular cleaning of accumulated dust increases maintenance costs. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a streamlined and flow-balanced pre-flue of an electrostatic precipitator, which can solve at least one of the above problems.

[0008] To achieve the above objectives, this utility model proposes a streamlined and flow-balanced electrostatic precipitator pre-flue, including a flue gas inlet and two diversion interfaces. The output end of the flue gas inlet is provided with two diversion interfaces. The two diversion interfaces and the flue gas inlet are arranged in a Y-shape. The two diversion interfaces are symmetrically arranged and their axis of symmetry coincides with the center line of the flue gas inlet. A row of spaced guide plates I is provided in the connection between the diversion interfaces and the flue gas inlet. The rear end of each diversion interface is provided with a horizontal diversion pipe and an inclined diversion pipe located outside the horizontal diversion pipe.

[0009] Preferably, the included angle α between the two split interfaces is 90 degrees.

[0010] Preferably, the tilt angle of the inclined splitter pipe is the same as the tilt angle of the splitter interface connected to it, and the output end of the inclined splitter pipe is provided with a horizontal interface.

[0011] Preferably, the horizontal interface and the inclined diversion pipe are provided with a plurality of guide plates II arranged in a row, and the guide plate II includes an arc-shaped section I and a horizontal section I located at the rear end of the arc-shaped section I.

[0012] Preferably, the horizontal diversion pipe and the diversion interface are provided with a plurality of guide plates III arranged in a row. The guide plate III includes an arc-shaped section II. The front end of the arc-shaped section II is provided with an inclined section I with the same inclination as the corresponding diversion interface. The rear end of the arc-shaped section II is provided with a horizontal section II.

[0013] Preferably, the guide plate I includes an arc-shaped section III and an inclined section II located at the rear end of the arc-shaped section III, wherein the inclined section II has the same inclination as the corresponding diversion interface.

[0014] Preferably, the front end of the smoke inlet is connected to the vertical flue via an upper elbow, and the lower end of the vertical flue is connected to the main flue via a lower elbow. The upper elbow is provided with an upper guide arc plate near its inner arc surface, and the rear end of the upper guide arc plate is provided with a horizontal plate located inside the smoke inlet. The lower elbow is provided with a lower guide arc plate near its inner arc surface, and the upper end of the lower guide arc plate is provided with a vertical plate located inside the vertical flue. Both the upper elbow and the lower elbow are right-angle arc elbows.

[0015] The beneficial effects of this utility model are as follows: By providing two diversion interfaces at the output end of the smoke inlet, the two diversion interfaces and the smoke inlet are arranged in a Y-shape, the two diversion interfaces are symmetrically arranged and the axis of symmetry coincides with the center line of the smoke inlet, and a row of spaced guide plates I are provided in the connection between the diversion interface and the smoke inlet. The rear end of the diversion interface is provided with a horizontal diversion pipe and an inclined diversion pipe located outside the horizontal diversion pipe, so that the shape of the flue is kept as streamlined as possible, avoiding sharp turns or abrupt changes in cross section, thereby reducing airflow resistance and the formation of vortices.

[0016] 1. The streamlined flue structure simplifies the design of the flow guiding device, reduces the technical difficulty and cost in the design and manufacturing process, and the simplified design also helps to improve the stability and reliability of the flow guiding device;

[0017] 2. The streamlined flue structure effectively eliminates local eddies and turbulence, avoids the scouring and wear of the flue inner wall and the guide device by the airflow, extends the service life of the flue system and related equipment, and at the same time reduces the pressure drop of the airflow in the flue, improving the energy efficiency of the entire flue system.

[0018] 3. The streamlined flue structure avoids sharp turns and abrupt changes in cross-section. By optimizing airflow distribution, it eliminates local dead zones, reduces the possibility of dust accumulation, and lowers maintenance costs.

[0019] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the structure of the front flue of a streamlined and flow-balanced electrostatic precipitator according to this utility model.

[0021] Figure 2 is a side view of the front flue of a streamlined and flow-balanced electrostatic precipitator according to this utility model.

[0022] Figure 3 is a cross-sectional velocity vector diagram of the front flue of a streamlined and flow-balanced electrostatic precipitator according to this utility model.

[0023] Figure 4 is a schematic diagram of the structure of the pre-flue of the existing four-chamber electrostatic precipitator.

[0024] Figure 5 is a cross-sectional velocity vector diagram of the pre-flue of an existing four-chamber electrostatic precipitator.

[0025] In the diagram: 1-Smoke inlet, 2-Diverter interface, 3-Horizontal diverter pipe, 4-Inclined diverter pipe, 5-Guide plate I, 6-Horizontal interface, 7-Guide plate II, 8-Guide plate III, 9-Upper elbow, 10-Vertical flue, 11-Lower elbow, 12-Main flue, 13-Upper guide arc plate, 14-Horizontal plate, 15-Lower guide arc plate, 16-Vertical plate, 51-Arc segment III, 52-Inclined segment II, 71-Arc segment I, 72-Horizontal segment I, 81-Arc segment II, 82-Inclined segment I, 83-Horizontal segment II. Detailed Implementation

[0026] Referring to Figures 1, 2, 3, and 4, the present invention discloses a streamlined and flow-balanced electrostatic precipitator pre-flue, comprising a flue gas inlet 1 and two diversion interfaces 2. The output end of the flue gas inlet 1 is provided with two diversion interfaces 2. The two diversion interfaces 2 and the flue gas inlet 1 are arranged in a Y-shape. The two diversion interfaces 2 are symmetrically arranged and their axis of symmetry coincides with the center line of the flue gas inlet 1. A row of spaced guide plates I5 is provided in the connection between the diversion interfaces 2 and the flue gas inlet 1. The rear end of each diversion interface 2 is provided with a horizontal diversion pipe 3 and an inclined diversion pipe 4 located outside the horizontal diversion pipe 3.

[0027] The included angle α between the two split interfaces 2 is 90 degrees.

[0028] The inclination of the inclined splitter pipe 4 is the same as the inclination of the splitter interface 2 connected to it, and the output end of the inclined splitter pipe 4 is provided with a horizontal interface 6.

[0029] The horizontal interface 6 and the inclined diversion pipe 4 are provided with a number of guide plates II7 arranged in a row. The guide plate II7 includes an arc-shaped section I71 and a horizontal section I72 located at the rear end of the arc-shaped section I71.

[0030] The horizontal diversion pipe 3 and the diversion interface 2 are provided with a number of guide plates III8 arranged in a row. The guide plate III8 includes an arc-shaped section II81. The front end of the arc-shaped section II81 is provided with an inclined section I82 with the same inclination as the corresponding diversion interface 2. The rear end of the arc-shaped section II81 is provided with a horizontal section II83.

[0031] The guide plate I5 includes an arc-shaped section III51 and an inclined section II52 located at the rear end of the arc-shaped section III51. The inclined section II52 has the same inclination as the corresponding diversion interface 2.

[0032] The front end of the smoke inlet 1 is connected to the vertical flue 10 via an upper bend 9. The lower end of the vertical flue 10 is connected to the main flue 12 via a lower bend 11. The upper bend 9 is provided with an upper guide arc plate 13 near its inner arc surface. The rear end of the upper guide arc plate 13 is provided with a horizontal plate 14 located inside the smoke inlet 1. The lower bend 11 is provided with a lower guide arc plate 15 near its inner arc surface. The upper end of the lower guide arc plate 15 is provided with a vertical plate 16 located inside the vertical flue 10. Both the upper bend 9 and the lower bend 11 are right-angle arc bends.

[0033] The working process of this utility model:

[0034] In the operation of the pre-flue of the streamlined and flow-balanced electrostatic precipitator of this utility model, the flue gas output from the main flue 12 passes sequentially through the lower bend 11, the vertical flue 10, the upper bend 9, and the flue gas inlet 1. Finally, it is guided by the guide plate 15 and enters the two diversion interfaces 2 respectively. Then, it enters the horizontal diversion pipe 3 and the inclined diversion pipe 4 respectively. The flue gas output from the horizontal diversion pipe 3 enters the inlet end of the electrostatic precipitator connected to it, and the flue gas output from the inclined diversion pipe 4 enters the inlet end of the electrostatic precipitator connected to it through the horizontal interface 6.

[0035] This application optimizes the design of the flue of a four-chamber electrostatic precipitator. The design fully considers the flue structure and flow deviation. To ensure uniform airflow into the precipitator and that the flue gas volume deviation of each branch flue meets the standard requirements, the flue shape is kept as smooth and continuous as possible in a streamlined shape, avoiding sharp turns or abrupt changes in cross-section to reduce airflow resistance and eddy formation. At the same time, a full-process CFD simulation of the flue was performed to accurately analyze the flow field inside the flue. After adding guide plates in the streamlined flue, local eddies and turbulence were significantly eliminated, achieving the best airflow distribution effect and reasonable flow distribution in each branch flue.

[0036] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A streamlined and flow-balanced pre-flue of an electrostatic precipitator, characterized in that: It includes a smoke inlet (1) and two diversion interfaces (2). The output end of the smoke inlet (1) is provided with two diversion interfaces (2). The two diversion interfaces (2) and the smoke inlet (1) are arranged in a Y-shape. The two diversion interfaces (2) are symmetrically arranged and the axis of symmetry coincides with the center line of the smoke inlet (1). A row of spaced guide plates I (5) is provided in the connection between the diversion interface (2) and the smoke inlet (1). The rear end of the diversion interface (2) is provided with a horizontal diversion pipe (3) and an inclined diversion pipe (4) located outside the horizontal diversion pipe (3).

2. The streamlined and flow-balanced pre-flue of an electrostatic precipitator as described in claim 1, characterized in that: The included angle α between the two split interfaces (2) is 90 degrees.

3. The streamlined and flow-balanced pre-flue of an electrostatic precipitator as described in claim 1, characterized in that: The inclination of the inclined shunt pipe (4) is the same as the inclination of the shunt interface (2) connected to it, and the output end of the inclined shunt pipe (4) is provided with a horizontal interface (6).

4. The streamlined and flow-balanced pre-flue of an electrostatic precipitator as described in claim 3, characterized in that: The horizontal interface (6) and the inclined diversion pipe (4) are provided with several guide plates II (7) arranged in a row. The guide plate II (7) includes an arc section I (71) and a horizontal section I (72) located at the rear end of the arc section I (71).

5. The streamlined and flow-balanced pre-flue of an electrostatic precipitator as described in claim 1, characterized in that: The horizontal diversion pipe (3) and the diversion interface (2) are provided with a number of guide plates III (8) arranged in a row. The guide plate III (8) includes an arc section II (81). The front end of the arc section II (81) is provided with an inclined section I (82) with the same inclination as the corresponding diversion interface (2). The rear end of the arc section II (81) is provided with a horizontal section II (83).

6. The streamlined and flow-balanced pre-flue of an electrostatic precipitator as described in claim 1, characterized in that: The guide plate I (5) includes an arc-shaped section III (51) and an inclined section II (52) located at the rear end of the arc-shaped section III (51). The inclined section II (52) has the same inclination as the corresponding diversion interface (2).

7. A streamlined and flow-balanced electrostatic precipitator pre-flue duct as described in any one of claims 1 to 6, characterized in that: The front end of the smoke inlet (1) is connected to the vertical flue (10) through the upper elbow (9), and the lower end of the vertical flue (10) is connected to the main flue (12) through the lower elbow (11). The upper elbow (9) is provided with an upper guide arc plate (13) close to its inner arc surface. The rear end of the upper guide arc plate (13) is provided with a horizontal plate (14) located in the smoke inlet (1). The lower elbow (11) is provided with a lower guide arc plate (15) close to its inner arc surface. The upper end of the lower guide arc plate (15) is provided with a vertical plate (16) located in the vertical flue (10). The upper elbow (9) and the lower elbow (11) are both right-angle arc elbows.

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