Aperture-adjustable electric precipitation airflow distribution plate device and use method thereof

Abstract

The invention discloses an aperture-adjustable electric dust removal airflow distribution plate device and a use method thereof. The aperture-adjustable electric dust removal airflow distribution plate device comprises an electric dust remover shell; an airflow distribution plate; holes in the airflow distribution plate comprise a center hole located in the center and peripheral holes distributed around the center hole in a multilayer concentric circle mode, a hollow shaft extending outwards is fixedly connected to the center hole, and a circular adjusting plate attached to one side of the airflow distribution plate is further installed in the electric dust remover shell. A center matching hole in running fit with the hollow shaft is formed in the circle center of the circular adjusting plate, first peripheral matching holes corresponding to part of the peripheral holes are formed in the circular adjusting plate, and an annular adjusting plate attached to the airflow distribution plate is arranged outside the circular adjusting plate; the annular adjusting plate and the circular adjusting plate are in sliding fit through balls. The invention has the beneficial effects that the cylindrical extension part and the annular extension part rotate synchronously or independently, so that the aperture of the peripheral holes is adjusted, and the aperture can be adjusted along with the change of flue gas conditions.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic precipitator technology, and in particular to an electrostatic precipitator airflow distribution plate device with adjustable aperture and a use method thereof. Background Art

[0002] In industries such as sulfuric acid production and thermal power generation, electrostatic precipitator equipment is usually needed to recover dust in flue gas. It mainly uses high-voltage electric field to ionize flue gas and adsorb dust, thereby greatly reducing the dust content in flue gas and achieving the purpose of dust removal. Figure 1 As shown, it is usually composed of an inlet trumpet-shaped area 16, an electric field area 17 and an outlet trumpet-shaped area 18, and an airflow distribution plate is provided between the trumpet-shaped area and the electric field area, the purpose of which is to make the flue gas flow rate inside the electrostatic precipitator uniform, so that it can pass through the electric field area better and be ionized, so that more dust can be adsorbed on the plate, thereby achieving a good dust removal effect. Under different working conditions of flue gas, in order to maintain uniform airflow distribution and obtain a higher dust removal effect, the theoretical optimal aperture of the distribution plate will also change, and the general airflow distribution plate is a single-plate fixed aperture structure, which is difficult to make timely adjustments as the flue gas conditions change, and the optimal dust removal efficiency cannot be obtained, resulting in unsatisfactory dust removal effect.

[0003] For example, Chinese invention patent publication number CN201353530Y discloses an airflow adjustable electrostatic precipitator, in which the shell is composed of columns, beams and wall panels to form an independent dust collection space isolated from the external environment. The anode system is hung on the upper beam of the shell, and the cathode system is hung on the hot top of the shell. The anode vibration system, cathode vibration system, and high-voltage power supply device are respectively installed on the cold top cover of the shell and placed outside the electric field. The inlet airflow distribution plate is connected to the upper side wall of the inlet horn at the upper end, and the lower part is kept with a gap between the bottom wall of the inlet horn; the upper end of the outlet slot plate is connected to the upper side wall of the outlet horn, and the lower part is kept with a gap between the bottom wall of the outlet horn. Square holes are evenly distributed on the inlet airflow distribution plate to form a curtain-like structure. This patent requires manual adjustment of the angle of the stretched and deformed part of the plate on the square hole to readjust the opening rate of the distribution plate, which is inconvenient to operate and needs to be stopped before processing.

[0004] Another example is China's invention patent publication number CN119327614A, which discloses a combined airflow distribution plate suitable for ultra-high electrostatic precipitator, including a first distribution plate, a second distribution plate and a third distribution plate; the first distribution plate is a convex bottom inclined surface structure, the convex bottom is plane A1, and both plane A1 and the inclined surface are provided with vents; the second distribution plate is a convex bottom inclined surface structure, the convex bottom is plane A2, and both plane A2 and the inclined surface are provided with vents, and a first flue gas velocity reduction pipe is provided at the outlet position of the vent on the plane A2; the third distribution plate is a concave bottom inclined surface structure, the concave bottom is plane A3, and vents are provided on the plane A3, and there are no vents on the inclined surface. This patent focuses on distributing the airflow according to the uniform airflow velocity standard, and does not involve the problem of aperture adjustment. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing electrostatic precipitator airflow distribution plates all have a single plate with a fixed aperture, and cannot obtain the best dust removal efficiency under different flue gas conditions. Therefore, an electrostatic precipitator airflow distribution plate device with adjustable aperture and a method for using the same are provided.

[0006] The technical solution of the present invention is: an electrostatic precipitator airflow distribution plate device with adjustable aperture, comprising: an electrostatic precipitator housing; an airflow distribution plate installed in the electrostatic precipitator housing; the holes on the airflow distribution plate include a central hole located in the center and peripheral holes distributed in multiple layers of concentric circles around the central hole, a hollow shaft extending outward is fixedly connected to the central hole, a circular adjustment plate abutting against one side of the airflow distribution plate is also installed in the electrostatic precipitator housing, a central matching hole for rotationally matching with the hollow shaft is opened at the center of the circular adjustment plate, a first peripheral matching hole corresponding to part of the peripheral holes is opened on the circular adjustment plate, a cylindrical extension portion is extended outward from the periphery of the circular adjustment plate, the cylindrical extension portion is transmission-connected to a first driving mechanism, an annular adjustment plate abutting against the airflow distribution plate is provided outside the circular adjustment plate, the annular adjustment plate and the circular adjustment plate are slidingly matched through balls, a second peripheral matching hole corresponding to the remaining peripheral holes is opened on the annular adjustment plate, an annular extension portion is extended outward from the periphery of the annular adjustment plate, and the circular extension portion is transmission-connected to a second driving mechanism.

[0007] The improvement of the above solution is that an annular groove for accommodating balls is provided on the inner edge of the annular adjustment plate or the outer edge of the circular adjustment plate.

[0008] In the above scheme, the first driving mechanism includes a motor installed outside the electrostatic precipitator housing, a driving gear extending into the electrostatic precipitator housing is installed on the transmission shaft of the motor, and a circle of driven teeth meshing with the driving gear is formed on the surface of the cylindrical extension.

[0009] In the above scheme, the second driving mechanism includes a motor installed outside the electrostatic precipitator housing, a driving gear extending into the electrostatic precipitator housing is installed on the transmission shaft of the motor, and a circle of driven teeth meshing with the driving gear is provided on the surface of the annular extension portion.

[0010] In the above solution, one end of the cylindrical extension away from the air flow distribution plate is open.

[0011] A further improvement of the above solution is that a closed end plate is fixedly connected to one end of the cylindrical extension away from the airflow distribution plate, and a third peripheral matching hole corresponding to the first peripheral matching hole is formed on the closed end plate.

[0012] In the above solution, the central hole is circular, and the peripheral holes are circular, arc-shaped or elliptical.

[0013] A method for using an electrostatic precipitator airflow distribution plate device with adjustable aperture comprises the following steps: driving a cylindrical extension portion to rotate by a first driving mechanism so that a first peripheral matching hole of a circular adjustment plate is misaligned with a part of the peripheral holes, thereby changing the aperture of the part of the peripheral holes; driving an annular extension portion to rotate by a second driving mechanism so that a second peripheral matching hole of the annular adjustment plate is misaligned with the remaining peripheral holes, thereby changing the aperture of the remaining peripheral holes, thereby obtaining a desired aperture.

[0014] The beneficial effect of the present invention is that the first driving mechanism and the second driving mechanism respectively drive the cylindrical extension part and the annular extension part to rotate synchronously or independently, thereby adjusting the aperture of the peripheral holes, and the aperture can be adjusted as the smoke conditions change. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an electrostatic precipitator; Figure 2 is a schematic diagram of the air flow distribution plate in the present invention; Figure 3 It is a schematic diagram of the cooperation between the circular adjustment plate and the annular adjustment plate in the present invention; Figure 4 It is a schematic diagram of the cooperation between the circular adjustment plate, the annular adjustment plate, the first driving mechanism and the second driving mechanism in the present invention; Figure 5 It is a schematic diagram of the cooperation between the cylindrical extension part and the annular extension part in the present invention; Figure 6 is a schematic diagram of a circular adjustment plate and a cylindrical extension portion in the present invention; In the figure, 1, air flow distribution plate, 2, center hole, 3, peripheral hole, 4, hollow shaft, 5, circular adjustment plate, 6, first peripheral matching hole, 7, cylindrical extension, 8, annular adjustment plate, 9, ball, 10, second peripheral matching hole, 11, annular extension, 12, annular groove, 13, driving gear, 14, closed end plate, 15, third peripheral matching hole, 16, inlet trumpet-shaped area, 17, electric field area, 18, outlet trumpet-shaped area. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0017] like Figure 2-6 As shown, an electrostatic precipitator airflow distribution plate device with adjustable aperture comprises: an electrostatic precipitator housing; an airflow distribution plate 1 installed in the electrostatic precipitator housing; the holes on the airflow distribution plate include a central hole 2 located in the center and peripheral holes 3 distributed in multiple layers of concentric circles around the central hole, a hollow shaft 4 extending outward is fixedly connected to the central hole, a circular adjustment plate 5 abutting against one side of the airflow distribution plate is also installed in the electrostatic precipitator housing, a central matching hole rotatably matched with the hollow shaft is opened at the center of the circular adjustment plate, and a peripheral hole rotatably matched with the hollow shaft is opened on the circular adjustment plate. A first peripheral matching hole 6 corresponding to the peripheral holes is provided, a cylindrical extension portion 7 is extended outward from the periphery of the circular adjustment plate, and the cylindrical extension portion is transmission-connected to the first driving mechanism; an annular adjustment plate 8 is provided outside the circular adjustment plate and abuts against the airflow distribution plate, and the annular adjustment plate and the circular adjustment plate are slidingly matched through balls 9; a second peripheral matching hole 10 corresponding to the remaining peripheral holes is provided on the annular adjustment plate, an annular extension portion 11 is extended outward from the periphery of the annular adjustment plate, and the circular extension portion is transmission-connected to the second driving mechanism.

[0018] The holes of the air flow distribution plate are divided into central holes and peripheral holes. The peripheral holes can be divided into several groups of concentric circle arrays. The first peripheral matching holes of the circular adjustment plate can correspond to one, two or more groups of peripheral hole arrays, and the second peripheral matching holes of the annular adjustment plate correspond to the remaining groups of peripheral hole arrays.

[0019] The first driving mechanism and the second driving mechanism respectively provide independent power to drive the cylindrical extension part and the annular extension part to rotate, and can be driven synchronously so that the cylindrical extension part and the annular extension part rotate synchronously, so that the peripheral holes on the airflow distribution plate are partially obscured by the gradually misaligned first peripheral matching holes and the second peripheral matching holes, and the aperture of the peripheral holes is equivalent to gradually becoming smaller, or the peripheral holes on the airflow distribution plate are completely overlapped with the first peripheral matching holes and the second peripheral matching holes, and the aperture of the peripheral holes is maximized.

[0020] In order to prevent the balls from falling off, a preferred embodiment of the present invention is that the inner edge of the annular adjustment plate or the outer edge of the circular adjustment plate is provided with an annular groove 12 for accommodating the balls, and the annular groove plays a role of restraining the balls, and the balls can roll in the annular groove but will not fall off the annular groove. The gap between the annular adjustment plate and the circular adjustment plate is used for arranging the balls, so that the two can rotate relative to each other.

[0021] The first driving mechanism includes a motor installed outside the electrostatic precipitator housing, and a driving gear 13 extending into the electrostatic precipitator housing is installed on the transmission shaft of the motor. The surface of the cylindrical extension is provided with a circle of driven teeth meshing with the driving gear. When the motor is started, the driving gear drives the driven teeth to rotate. A notch is provided at the corresponding position of the electrostatic precipitator housing, so that part of the driving gear can extend into it and mesh with the driven teeth. The same is true for the second driving mechanism. The first driving mechanism and the second driving mechanism can work independently or synchronously.

[0022] The end of the cylindrical extension away from the air flow distribution plate may be open, or may be fixedly connected to a closed end plate 14, on which a third peripheral matching hole 15 corresponding to the first peripheral matching hole is formed.

[0023] The central hole can be circular, square, diamond or other possible geometric shapes, and the peripheral holes are circular, arc or elliptical. The length of the hollow shaft must be at least equal to the thickness of the circular adjustment plate to support the circular adjustment plate and the cylindrical extension. Preferably, the cylindrical extension is a solid structure with an axial hole in the center for the hollow shaft to pass through. The third peripheral matching holes are radially distributed inside the cylinder, which are equivalent to the radial extension of the first peripheral matching holes.

[0024] A method for using an electrostatic precipitator airflow distribution plate device with adjustable aperture, comprising the following steps: under normal conditions, some peripheral holes correspond one-to-one with first peripheral matching holes, and the remaining peripheral holes correspond one-to-one with second peripheral matching holes; a first driving mechanism is used to drive a cylindrical extension portion to rotate, so that the first peripheral matching holes of a circular adjustment plate are misaligned with some peripheral holes, which is equivalent to changing the aperture of some peripheral holes; a second driving mechanism is used to drive an annular extension portion to rotate, so that the second peripheral matching holes of the annular adjustment plate are misaligned with the remaining peripheral holes, and the aperture of the remaining peripheral holes is changed, so that the required aperture can be obtained.

[0025] The present invention can not only adjust the apertures to suit different smoke conditions, but also adjust the size of some peripheral holes and the remaining peripheral holes as needed, for example, the apertures of some peripheral holes can be increased, and the apertures of the remaining peripheral holes can be decreased, or vice versa. Thus, the airflow distribution can be precisely controlled, so that the airflow covers the target area more evenly, eliminating the phenomenon of local over-strength / under-strength.

Claims

1. An electrostatic precipitator airflow distribution plate device with adjustable aperture, comprising: Electrostatic precipitator housing; An airflow distribution plate (1) installed in an electrostatic precipitator housing; characterized in that: the holes on the airflow distribution plate include a central hole (2) located in the center and peripheral holes (3) distributed in multiple layers of concentric circles around the central hole, a hollow shaft (4) extending outward is fixedly connected to the central hole, a circular adjustment plate (5) abutting against one side of the airflow distribution plate is also installed in the electrostatic precipitator housing, a central matching hole for rotationally matching with the hollow shaft is opened at the center of the circular adjustment plate, a first peripheral matching hole (6) corresponding to part of the peripheral holes is opened on the circular adjustment plate, a cylindrical extension portion (7) is extended outward from the periphery of the circular adjustment plate, and the cylindrical extension portion is transmission-connected to a first driving mechanism, an annular adjustment plate (8) abutting against the airflow distribution plate is provided outside the circular adjustment plate, the annular adjustment plate and the circular adjustment plate are slidingly matched via a ball (9), a second peripheral matching hole (10) corresponding to the remaining peripheral holes is opened on the annular adjustment plate, an annular extension portion (11) is extended outward from the periphery of the annular adjustment plate, and the circular extension portion is transmission-connected to a second driving mechanism.

2. The electrostatic precipitator airflow distribution plate device with adjustable aperture according to claim 1, characterized in that: An annular groove (12) for accommodating a ball is provided on the inner edge of the annular adjustment plate or the outer edge of the circular adjustment plate.

3. The electrostatic precipitator air flow distribution plate device with adjustable aperture according to claim 1, characterized in that: The first driving mechanism comprises a motor mounted outside the electrostatic precipitator housing, a driving gear (13) extending into the electrostatic precipitator housing is mounted on the transmission shaft of the motor, and a circle of driven teeth meshing with the driving gear is provided on the surface of the cylindrical extension portion.

4. The electrostatic precipitator airflow distribution plate device with adjustable aperture according to claim 1, characterized in that: The second driving mechanism comprises a motor installed outside the electrostatic precipitator housing, a driving gear extending into the electrostatic precipitator housing is installed on the transmission shaft of the motor, and a circle of driven teeth meshing with the driving gear is provided on the surface of the annular extension portion.

5. The electrostatic precipitator air flow distribution plate device with adjustable aperture according to claim 1, characterized in that: One end of the cylindrical extension away from the air flow distribution plate is open.

6. The electrostatic precipitator airflow distribution plate device with adjustable aperture according to claim 1, characterized in that: One end of the cylindrical extension away from the airflow distribution plate is fixedly connected to a closed end plate (14), and a third peripheral matching hole (15) corresponding to the first peripheral matching hole is formed on the closed end plate.

7. The electrostatic precipitator airflow distribution plate device with adjustable aperture according to claim 1, characterized in that: The central hole is circular, and the peripheral holes are circular, arc-shaped or elliptical.

8. A method for using the electrostatic precipitator airflow distribution plate device with adjustable aperture according to any one of claims 1 to 7, characterized in that: The following steps are involved: The cylindrical extension part is driven to rotate by the first driving mechanism, so that the first peripheral matching hole of the circular adjustment plate is misaligned with some peripheral holes, thereby changing the aperture of some peripheral holes. The annular extension part is driven to rotate by the second driving mechanism, so that the second peripheral matching hole of the annular adjustment plate is misaligned with the remaining peripheral holes, thereby changing the aperture of the remaining peripheral holes, so that the required aperture can be obtained.

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