Large electric precipitator flow field improving device

Abstract

The utility model discloses a large electric dust collector flow field improving device which comprises an electric dust collector inlet end socket, a flow guide mechanism, a flow equalizing plate I, a flow equalizing plate II and a flow equalizing plate III, and the flow guide mechanism, the flow equalizing plate I, the flow equalizing plate II and the flow equalizing plate III are sequentially arranged in the electric dust collector inlet end socket in the flue gas flow direction. The flow guide mechanism comprises two transverse flow guide plates and two longitudinal flow guide plates, the longitudinal flow guide plates and the transverse flow guide plates are arranged in a crossed mode to form a plurality of flow guide holes, the two transverse flow guide plates are symmetrically arranged, and the distance between the smoke airflow facing ends is smaller than that between the smoke airflow back ends. Compared with the prior art, the dust removal device has the advantages that the dust removal efficiency can be improved, the service life of equipment can be prolonged, the energy consumption can be reduced, and the operation safety and stability of the equipment can be improved.

Description

A large flow field improvement device for electrostatic precipitators Technical Field

[0001] This utility model relates to the technical field of flue gas pollutant treatment, and in particular to the technical field of a large electrostatic precipitator flow field improvement device. Background Technology

[0002] Under the national policy of ultra-low emissions, steel mills are facing the need for technological transformation and upgrading of electrostatic precipitators. Due to space constraints and economic cost factors, many steel mills do not include the flue gas ducts before and after the electrostatic precipitator in the scope of transformation. As a result, many electrostatic precipitators with mismatched cross-sectional ratios of the imported end caps have appeared on the market. In order to achieve uniform airflow distribution at the inlet of the electrostatic precipitator, as shown in Figure 6, the existing technical solution requires the installation of 2-3 layers of flow equalization plates inside the inlet end cap of the electrostatic precipitator. Under the action of the flow equalization plates, the flue gas is divided into multiple fine streams, and natural diffusion is achieved by utilizing the pressure difference between the holes.

[0003] Currently, the mismatch in the cross-sectional ratio of the inlet end caps of electrostatic precipitators makes this method quite difficult to implement, and the following problems are likely to occur:

[0004] 1. The airflow uniformity at the electric field inlet is difficult to meet the requirements, and the wind speed is too high, which makes it impossible for dust to be effectively captured, reducing the overall dust removal efficiency.

[0005] 2. Uneven flow velocity in the electric field region may lead to uneven wear of equipment inside the dust collector, shortening its service life and increasing the cost of parts maintenance;

[0006] 3. As shown in Figure 7, the uneven flow velocity at the electric field inlet can easily cause secondary dust in the electric field area, increase local resistance loss, affect dust removal efficiency, increase the difficulty of dust removal and increase energy consumption. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a large flow field improvement device for electrostatic precipitators, which can improve dust removal efficiency, extend equipment service life, and reduce energy consumption.

[0008] To achieve the above objectives, this utility model proposes a large flow field improvement device for an electrostatic precipitator, comprising an electrostatic precipitator inlet end cap, a flow guiding mechanism, a flow equalization plate I, a flow equalization plate II, and a flow equalization plate III. The flow guiding mechanism, flow equalization plate I, flow equalization plate II, and flow equalization plate III are sequentially arranged inside the electrostatic precipitator inlet end cap along the flue gas flow direction. The flow guiding mechanism includes two transverse flow guiding plates and two longitudinal flow guiding plates. The longitudinal flow guiding plates and transverse flow guiding plates are arranged intersectingly to form a plurality of flow guiding holes. The two transverse flow guiding plates are symmetrically arranged with the distance between their front and back flue gas flow ends being smaller than the distance between their back and front flue gas flow ends. The two longitudinal flow guiding plates are also symmetrically arranged with the distance between their front and back flue gas flow ends being smaller than the distance between their back and front flue gas flow ends.

[0009] Preferably, the inlet end cap of the electrostatic precipitator has four inclined side walls with the same shape. The cross-sectional area of ​​the inlet end cap gradually increases along the flue gas flow direction. The front and rear longitudinal guide plates are parallel to the front and rear side walls, respectively, and the upper and lower transverse guide plates are parallel to the upper and lower side walls, respectively.

[0010] Preferably, the length 'a' of the two ends of the longitudinal guide plate extending beyond the corresponding transverse guide plate is 1300mm, the length 'a' of the two ends of the transverse guide plate extending beyond the corresponding longitudinal guide plate is 1300mm, the distance 'b' between the rear ends of the longitudinal and transverse guide plates and the flue gas inlet of the electrostatic precipitator inlet head is 750mm, the distance 'c' between the ends of the two longitudinal guide plates facing the flue gas inlet is 1400mm, and the distance 'c' between the ends of the two transverse guide plates facing the flue gas inlet is 1400mm.

[0011] Preferably, the flow equalization plate I, flow equalization plate II and flow equalization plate III are all provided with uniformly distributed flow equalization holes.

[0012] Preferably, the front side of the flow equalization plate II is provided with a number of vertical baffles that are evenly spaced apart, and the upper half of the rear side of the flow equalization plate II is provided with upper guide plates that are evenly spaced apart from top to bottom and inclined downwards.

[0013] Preferably, the lower half of the front side of the flow equalization plate III is provided with a lower guide plate that is evenly spaced from top to bottom and inclined downwards.

[0014] The beneficial effects of this invention are as follows: Through the flow guiding mechanism, the flue gas entering the dust collector is effectively diffused before impacting the flow equalization plate, which effectively optimizes and improves the airflow field. Uniform airflow at the electric field inlet helps dust to be evenly distributed in the electric field, improving particulate matter collection efficiency and reducing secondary dust generation, thereby improving the dust removal efficiency of the electrostatic precipitator. Uniform airflow reduces local resistance, lowers energy consumption, reduces local wear, extends service life, and reduces equipment damage and maintenance costs. Uniform airflow in the electric field area avoids excessively high local corona intensity, reducing corona noise and ozone generation, and improving the safety and stability of equipment operation. Compared with existing technologies, this invention improves dust removal efficiency, extends equipment service life, reduces energy consumption, and enhances the safety and stability of equipment operation.

[0015] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of a large electrostatic precipitator flow field improvement device according to this utility model;

[0017] Figure 2 is a side view of a large flow field improvement device for an electrostatic precipitator according to this utility model;

[0018] Figure 3 is a top view of a large flow field improvement device for an electrostatic precipitator according to this utility model;

[0019] Figure 4 is a schematic diagram of the flow guiding mechanism;

[0020] Figure 5 shows the airflow distribution at the electric field inlet using a flow guiding mechanism and a flow equalizing plate.

[0021] Figure 6 is a schematic diagram of a flow equalization plate installed inside the inlet end cap of an existing electrostatic precipitator;

[0022] Figure 7 shows the airflow distribution at the inlet of an existing electrostatic precipitator using only a flow equalization plate electric field.

[0023] In the figure: 1-Inlet end cap of electrostatic precipitator, 2-Flow guiding mechanism, 3-Flow equalization plate I, 4-Flow equalization plate II, 5-Flow equalization plate III, 6-Flue gas inlet, 7-Flow equalization hole, 8-Vertical baffle, 9-Upper guide plate, 10-Lower guide plate, 11-Side wall, 21-Horizontal guide plate, 22-Longitudinal guide plate, 23-Flow guiding hole. Detailed Implementation

[0024] Referring to Figures 1, 2, 3, 4, and 5, this utility model discloses a large flow field improvement device for an electrostatic precipitator, comprising an electrostatic precipitator inlet end cap 1, a flow guiding mechanism 2, a flow equalization plate I3, a flow equalization plate II4, and a flow equalization plate III5. The flow guiding mechanism 2, the flow equalization plate I3, the flow equalization plate II4, and the flow equalization plate III5 are sequentially arranged inside the electrostatic precipitator inlet end cap 1 along the flue gas flow direction. The flow guiding mechanism 2 includes two horizontal flow guiding plates 21 and two vertical flow guiding plates 22. The vertical flow guiding plates 22 and the horizontal flow guiding plates 21 are arranged intersectingly to form a plurality of flow guiding holes 23. The two horizontal flow guiding plates 21 are symmetrically arranged with the distance between their front and back flue gas flow ends being smaller than the distance between their back and front flue gas flow ends. The two vertical flow guiding plates 22 are symmetrically arranged with the distance between their front and back flue gas flow ends being smaller than the distance between their back and front flue gas flow ends.

[0025] The inlet end cap 1 of the electrostatic precipitator has four inclined side walls 11, all of which have the same shape. The cross-sectional area of ​​the inlet end cap 1 gradually increases along the flue gas flow direction. The front and rear longitudinal guide plates 22 are parallel to the front and rear side walls 11, respectively, and the upper and lower transverse guide plates 21 are parallel to the upper and lower side walls 11, respectively.

[0026] The length a of the two ends of the longitudinal guide plate 22 extending beyond the corresponding transverse guide plate 21 is 1300mm. The length a of the two ends of the transverse guide plate 21 extending beyond the corresponding longitudinal guide plate 22 is 1300mm. The distance b between the rear ends of the longitudinal guide plate 22 and the transverse guide plate 21 and the flue gas inlet 6 of the electrostatic precipitator inlet end cap 1 is 750mm. The distance c between the ends of the two longitudinal guide plates 22 facing the flue gas inlet 6 is 1400mm. The distance c between the ends of the two transverse guide plates 21 facing the flue gas inlet 6 is 1400mm.

[0027] The flow equalization plate I3, flow equalization plate II4 and flow equalization plate III5 are all provided with uniformly distributed flow equalization holes 7.

[0028] The front side of the flow equalization plate II4 is provided with several vertical baffles 8 evenly spaced, and the upper half of the rear side of the flow equalization plate II4 is provided with upper guide plates 9 that are evenly spaced from top to bottom and inclined downwards.

[0029] The lower half of the front side of the flow equalization plate III5 is provided with a lower guide plate 10 that is evenly spaced from top to bottom and inclined downwards.

[0030] The working process of this utility model:

[0031] This utility model discloses a large flow field improvement device for electrostatic precipitators. During operation, the flow guiding mechanism ensures that the flue gas entering the precipitator is effectively diffused before impacting the flow equalization plate. When the diffused airflow passes through the flow equalization plate again, the pressure difference between the holes in the flow equalization plate moderately contracts and adjusts the pre-diffused airflow, further optimizing the airflow distribution. This achieves uniform airflow at the electric field inlet. Under the action of the flow equalization plate, the flue gas is divided into multiple fine streams, achieving natural diffusion through the pressure difference between the holes. The flow guiding plate changes the airflow direction, guiding the airflow to enter the electric field region more smoothly. This effectively optimizes and improves the flow field. Compared with existing technologies, it can improve dust removal efficiency, extend equipment service life, reduce energy consumption, and improve the safety and stability of equipment operation.

[0032] 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 large flow field improvement device for electrostatic precipitators, characterized in that: The device includes an inlet end cap (1) of an electrostatic precipitator, a flow guiding mechanism (2), a flow equalization plate I (3), a flow equalization plate II (4) and a flow equalization plate III (5). The inlet end cap (1) of the electrostatic precipitator is provided with the flow guiding mechanism (2), the flow equalization plate I (3), the flow equalization plate II (4) and the flow equalization plate III (5) in sequence along the flue gas flow direction. The flow guiding mechanism (2) includes two horizontal flow guiding plates (21) and two vertical flow guiding plates (22). The vertical flow guiding plates (22) and the horizontal flow guiding plates (21) are arranged to form a plurality of flow guiding holes (23). The two horizontal flow guiding plates (21) are symmetrically arranged and the distance between the ends facing the flue gas flow is smaller than the distance between the ends facing the flue gas flow. The two vertical flow guiding plates (22) are symmetrically arranged and the distance between the ends facing the flue gas flow is smaller than the distance between the ends facing the flue gas flow.

2. A large electro-precipitator flow field improvement device as claimed in claim 1, characterized in that: The inlet end cap (1) of the electrostatic precipitator has four inclined side walls (11), the four side walls (11) are the same in shape, the cross-sectional area of ​​the inlet end cap (1) of the electrostatic precipitator gradually increases along the flue gas flow direction, the front and rear longitudinal guide plates (22) are parallel to the front and rear side walls (11) respectively, and the upper and lower transverse guide plates (21) are parallel to the upper and lower side walls (11) respectively.

3. A large electro-precipitator flow field improvement device as claimed in claim 2, characterized in that: The length a of the two ends of the longitudinal guide plate (22) extending beyond the corresponding transverse guide plate (21) is 1300mm, the length a of the two ends of the transverse guide plate (21) extending beyond the corresponding longitudinal guide plate (22) is 1300mm, the distance b between the rear ends of the longitudinal guide plate (22) and the transverse guide plate (21) and the flue gas inlet (6) of the electrostatic precipitator inlet end cap (1) is 750mm, the distance c between the two ends of the longitudinal guide plate (22) facing the flue gas inlet (6) is 1400mm, and the distance c between the two ends of the transverse guide plate (21) facing the flue gas inlet (6) is 1400mm.

4. The large electrostatic precipitator flow field improvement device as described in claim 1, characterized in that: The flow equalization plate I (3), flow equalization plate II (4) and flow equalization plate III (5) are all provided with uniformly distributed flow equalization holes (7).

5. The large electrostatic precipitator flow field improvement device as described in claim 1, characterized in that: The flow equalization plate II (4) has several vertical baffles (8) evenly spaced on the front side, and the upper half of the rear side of the flow equalization plate II (4) has an upper guide plate (9) evenly spaced from top to bottom and inclined downward.

6. A large electrostatic precipitator flow field improvement device as described in any one of claims 1 to 5, characterized in that: The lower half of the front side of the flow equalization plate III (5) is provided with a lower guide plate (10) that is evenly spaced from top to bottom and inclined downwards.

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