ESP inlet airflow distribution assembly

Abstract

The invention relates to an ESP inlet airflow distribution assembly which is characterized in that three layers of airflow distribution plates are distributed on the section of an inlet machine shell (1) from small to large, an upper group of rapping devices (6) and a lower group of rapping devices (7) are arranged on the first layer of airflow distribution plate (2), and a group of rapping devices (8) and a group of rapping devices (9) are respectively arranged at the upper parts of the second layer of airflow distribution plate (3) and the third layer of airflow distribution plate (4); a horizontal support (5) used for overhauling the forward beating device is arranged on the first layer of airflow distribution plate and the second layer of airflow distribution plate, laying of temporary platform overhauling is facilitated, and the overhauling requirements of first, second and third layers of airflow distribution plate rapping devices and distribution plates are met. According to the scheme, the airflow distribution plate and the rapping device at the inlet are optimally designed, so that the production goals of high efficiency, energy conservation and environmental protection are achieved, references are provided for dry dust removers of various steel mills, and the practical application value is very high.

Description

Technical Field

[0001] The present invention relates to a distribution component, in particular to an ESP inlet airflow distribution component, which is applicable to environmental protection facilities of steel enterprises and other corresponding industrial fields. Background Art

[0002] Currently, an increasing number of domestic steel mills are using dry dust removal technology, also known as LT dust removal technology, for converter steelmaking. This dry (LT) dust removal system primarily consists of an evaporative cooler, an electrostatic precipitator, and a gas cooler. Compared to traditional converter dust removal systems (OG), the LT method offers the following advantages: high dust removal and purification efficiency. The electrostatic precipitator can directly reduce dust concentrations to below 10 mg / Nm³, maintaining high dust removal efficiency for fine dust particles less than 0.1 μm. This system utilizes a fully dry process, eliminating the need for secondary pollution or wastewater treatment. Furthermore, the system offers low resistance losses, a high calorific value for recovered gas, and direct utilization of recovered dust, saving energy.

[0003] The electrostatic precipitator equipment is the core component of the LT dust removal system. The electrostatic precipitator (ESP) in the LT steelmaking process consists of a cylindrical steel cover. Except for the lower area, this steel cover has an insulating protective cover as a whole. Inside this cover, there are four high-voltage electrostatic fields connected in series, and each electrostatic field has multiple parallel gas channels. The principle is that the converter raw gas containing dust passes through each electric field. Under the action of the electrostatic field, the gas ions migrate to the grounded cathode electrode, thereby generating a relatively polarized collecting anode electrode plate, which causes an electric current to flow (corona current). These negatively charged gas ions attach to the dust particles, causing them to generate a charge as well, causing them to be attracted to the anode electrode plate. The dust collected in the dry gas is deposited on the collecting anode electrode and must be discharged by knocking the plate at specified time intervals.

[0004] The following problems exist in the conventional design and use of ESPs: (1) The mesh holes of the air distribution plate are designed with flanges, especially the first-layer air distribution plate at the inlet, which is prone to being blocked by more than half within a 45-day maintenance cycle, resulting in reduced system air volume, poor dust removal effect, and poor gas recovery capacity; (2) The existing ordinary rapping hammer is not effective in knocking off dust and cannot knock off dust accumulated on the mesh in a timely manner; (3) It is inconvenient to repair and disassemble the rapping and distribution plate. (4) The rapper's working mode is long-term, resulting in a high equipment failure rate. Summary of the Invention

[0005] This invention addresses the challenges of existing technologies by providing an ESP inlet airflow distribution assembly. This technical solution features a distribution plate positioned at the cylindrical ESP inlet, evenly distributing the airflow entering the electric field. This innovative solution optimizes the design of the inlet airflow distribution plate and rapping device, achieving high-efficiency, energy-saving, and environmentally friendly production goals. This provides a reference and inspiration for dry-process dust collectors in various steel mills and has strong practical application value.

[0006] To achieve the above object, the technical solution of the present invention is as follows: an ESP inlet airflow distribution assembly, wherein three layers of airflow distribution plates are distributed in increasing order of size on the cross section of an inlet casing (1), an upper rapping device (6) and two lower rapping devices (7) are provided on the first layer of airflow distribution plate (2), a group of rapping devices (8) are provided on the upper portion of the second layer of airflow distribution plate (3), and a group of rapping devices (9) are provided on the upper portion of the third layer of airflow distribution plate (4). In order to facilitate maintenance, a horizontal bracket (5) for inspecting and inspecting the rapping devices is provided on the first layer of airflow distribution plate and the second layer of airflow distribution plate, so as to facilitate the laying of a temporary platform for maintenance and meet the maintenance needs of the rapping devices and the distribution plates of the first, second and third layers of airflow distribution plates.

[0007] The air flow distribution plate of each layer is arranged horizontally in the middle of three vertically mounted swing frame columns 3 (10), 2 (11) and 1 (12). A swing mounting pin is provided above the swing frame column, and the pin cooperates with the upper U-shaped support to realize the hanging of the column. A positioning sleeve is designed at the bottom of the frame column to cooperate with the guide column welded to the ESP inlet housing, and the designed clearance limits the range of swing.

[0008] The frame columns are connected by connecting plates to assemble the air distribution plates (27) into a circle. The first layer of air distribution plates has two sets of rapping devices. The principle of the rapping device is described below.

[0009] The transmission of the rapping device is driven by a 3-in-1 reducer (13) at the inlet. The reducer is directly mounted on a transmission shaft 1 (15). The input shaft passes through a sealing flange (14) connected to the ESP inlet casing. A sealing packing is designed at the bottom of the sealing flange to provide a seal and dustproof function.

[0010] Among them, the transmission shaft 1 (15) and the transmission shaft 2 (17) are connected through the shaft connection flange (16), and the transmission shaft 2 (17) is supported by three groups of transmission shaft dedicated support seat 1 (19), support seat 2 (22), and support seat 3 (25). The transmission support seat is fixed on the corresponding swing frame column 3 (10), frame column 2 (11), and frame column 1 (12). Three groups of positive hammers are evenly hung on the transmission shaft 2, namely, vibrating hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24). The three groups of vibrating hammers are respectively installed at positions corresponding to the swing frame columns. Corresponding to the hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24) are vibrating anvil 1 (20) installed on the swing frame column 1, vibrating anvil 2 (23) on the swing frame column 2, and vibrating anvil 3 (26) on the swing frame column 3.

[0011] After the motor is powered, the three-in-one reduction motor (13) drives the transmission shaft 1 (15) and the transmission shaft 2 (17) to rotate. The rotating transmission shaft 2 drives the vibration hammer 1 (18), the vibration hammer 1 (21), and the vibration hammer 1 (24) to rotate. When y exceeds its gravity balance point in sequence, the vibration hammer falls onto the corresponding end faces of the vibration anvil 1 (20), the vibration anvil 2 (23), and the vibration anvil 3 (26) according to the inertia of its own weight. Under the impact force, the vibration anvil drives the swing frame column to swing frame column 3 (10), frame column 2 (11), and frame column 1 (12) to passively impact. The shaking of the swing frame column 3 (10), frame column 2 (11), and frame column 1 (12) is connected to the air flow distribution plate (27) to vibrate, and the dust accumulated on it falls off in time.

[0012] The air distribution plate is installed in a distributed segmented manner using the existing upper hoisting holes. The air distribution plate is made by linear cutting uniform square holes in 10mm thick plate. The segmented air distribution plate is connected and bolted to the frame column using connecting plates to form an overall distribution plate with uniformly distributed circular mesh.

[0013] Compared with the prior art, the present invention has the following advantages: (1) The scheme optimizes the mesh design of the air distribution plate, cancels the flange design, and directly adopts thick plate wire cutting square holes; (2) The air distribution plate at the inlet of the vibration system in the scheme is designed as two groups, upper and lower; (3) In order to increase the vibration force, an enlarged bean sprout-shaped vibration hammer is provided, and the weight of the vibration hammer is increased; (4) The logical order of vibration is optimized to avoid simultaneous vibration, reduce the dust concentration at the inlet, and prevent yellow smoke from the chimney; (5) In the scheme, two groups of upper and lower 360° rotating pendulum vibration devices are provided on one layer of the air distribution plate, which improves the effect of vibration and dust removal and avoids the blockage of the air distribution plate. The air distribution plate adopts the method of direct wire cutting of the plate holes to avoid dust accumulation and save the use of materials. In terms of the vibration and dust removal timing, we arrange the vibration output before and after the converter oxygen blowing to oscillate, avoiding the peak of the dust removal of the dust removal system ESP during the blowing process. The dust content at the ESP inlet is uniform, eliminating the influence of overload on the electric field dust removal emission effect. The newly designed ESP inlet air flow distribution plate optimizes and improves the previously used device; (6) The vibration timing of this scheme is optimized to ensure the safety and reliability of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall layout design of the electrostatic precipitator inlet air distribution plate;

[0015] Figure 2 Schematic diagram of the inlet air flow distribution plate and vibration design of the electrostatic precipitator.

[0016] In the figure: 1. Inlet casing, 2. First layer air distribution plate, 3. Second layer air distribution plate, 4. Third layer air distribution plate, 5. Horizontal bracket, 6. Upper rapping device of first layer air distribution plate, 7. Lower rapping device of first layer air distribution plate, 10. Upper rapping device of swing frame column one, 8. Lower rapping device of second layer air distribution plate, 9. Rapping device of third layer air distribution plate, 11. Swing frame column two, 12. Swing frame column three, 13. Driving three-in-one reduction motor, 14. Sealing flange, 15. Output transmission shaft one, 16. Shaft coupling flange, 17. Transmission shaft two, 18. Rapping hammer one, 19. Transmission shaft support one, 20. Rapping anvil one, 21. Rapping hammer two, 22. Transmission shaft support two, 23. Rapping anvil two, 24. Rapping hammer three, 25. Transmission support three, 26. Rapping anvil three, 27. Air distribution plate. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, this embodiment is described in detail below with reference to the accompanying drawings.

[0018] Example 1: See Figure 1 — Figure 2An ESP inlet airflow distribution assembly is provided. Three layers of airflow distribution plates are distributed in increasing order of cross section on an inlet casing (1). An upper rapping device (6) and two lower rapping devices (7) are provided on a first-layer airflow distribution plate (2). A group of rapping devices (8) is provided on a second-layer airflow distribution plate (3). A group of rapping devices (9) is provided on the upper portion of a third-layer airflow distribution plate (4). In order to facilitate maintenance, a horizontal bracket (5) for inspecting and inspecting the rapping devices is provided on the first-layer airflow distribution plate and the second-layer airflow distribution plate, thereby facilitating the laying of a temporary platform for maintenance and meeting the maintenance needs of the rapping devices and the distribution plates on the first, second, and third layers of airflow distribution plates.

[0019] The air flow distribution plate of each layer is arranged horizontally in the middle of three vertically mounted swing frame columns 3 (10), 2 (11) and 1 (12). A swing mounting pin is provided above the swing frame column, and the pin cooperates with the upper U-shaped support to realize the hanging of the column. A positioning sleeve is designed at the bottom of the frame column to cooperate with the guide column welded to the ESP inlet housing, and the designed clearance limits the range of swing.

[0020] The frame columns are connected by connecting plates to assemble the air distribution plates (27) into a circle. The first layer of air distribution plates has two sets of rapping devices. The principle of the rapping device is described below.

[0021] The transmission of the rapping device is driven by a 3-in-1 reducer (13) at the inlet. The reducer is directly mounted on a transmission shaft 1 (15). The input shaft passes through a sealing flange (14) connected to the ESP inlet casing. A sealing packing is designed at the bottom of the sealing flange to provide a seal and dustproof function.

[0022] Among them, the transmission shaft 1 (15) and the transmission shaft 2 (17) are connected through the shaft connection flange (16), and the transmission shaft 2 (17) is supported by three groups of transmission shaft dedicated support seat 1 (19), support seat 2 (22), and support seat 3 (25). The transmission support seat is fixed on the corresponding swing frame column 3 (10), frame column 2 (11), and frame column 1 (12). Three groups of positive hammers are evenly hung on the transmission shaft 2, namely, vibrating hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24). The three groups of vibrating hammers are respectively installed at positions corresponding to the swing frame columns. Corresponding to the hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24) are vibrating anvil 1 (20) installed on the swing frame column 1, vibrating anvil 2 (23) on the swing frame column 2, and vibrating anvil 3 (26) on the swing frame column 3.

[0023] After the motor is powered, the three-in-one reduction motor (13) drives the transmission shaft 1 (15) and the transmission shaft 2 (17) to rotate. The rotating transmission shaft 2 (17) drives the vibration hammer 1 (18), the vibration hammer 1 (21), and the vibration hammer 1 (24) to rotate. When y exceeds its gravity balance point in sequence, the vibration hammer falls onto the corresponding end faces of the vibration anvil 1 (20), the vibration anvil 2 (23), and the vibration anvil 3 (26) according to the inertia of its own weight. Under the impact force, the vibration anvil drives the swing frame column swing frame column 3 (10), frame column 2 (11), and frame column 1 (12) to passively impact. The shaking of the swing frame column 3 (10), frame column 2 (11), and frame column 1 (12) is connected to the air flow distribution plate (27) to vibrate, and the dust accumulated on it falls off in time.

[0024] The air distribution plate (27) is installed by using the existing upper hanging hole. The air distribution plate is made by cutting uniform square holes in a 10mm thick plate. The air distribution plate is assembled and installed on the frame column by connecting the plate bolts to form an overall distribution plate with uniformly distributed circular mesh holes.

[0025] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions fall within the scope of protection of the claims of the present invention.

Claims

1. An ESP inlet airflow distribution assembly, characterized in that: Three layers of air flow distribution plates are distributed in the cross section of the inlet casing (1) from small to large. An upper rapping device (6) and two lower rapping devices (7) are arranged on the first layer of air flow distribution plate (2). A group of rapping devices (8) are respectively arranged on the upper part of the second layer of air flow distribution plate (3) and a group of rapping devices (9) are respectively arranged on the upper part of the third layer of air flow distribution plate (4). A horizontal bracket (5) for inspecting and correcting the rapping device is arranged on the first layer of air flow distribution plate and the second layer of air flow distribution plate.

2. The ESP inlet air flow distribution assembly according to claim 1, characterized in that: The air flow distribution plate of each layer is divided into three horizontally arranged vertically in the middle, namely, three swing frame columns (10), two frame columns (11), and one frame column (12). A swing mounting pin is provided above the swing frame column, and the pin cooperates with the upper U-shaped support to realize the hanging of the column. A positioning sleeve is designed at the bottom of the frame column to cooperate with the guide column welded and installed on the ESP inlet casing.

3. The ESP inlet airflow distribution assembly according to claim 2, characterized in that: Connecting plates are used between the frame columns to assemble the segmented air flow distribution plates (27) into a circle.

4. The ESP inlet air flow distribution assembly according to claim 3, characterized in that: The transmission of the rapping device is driven by a 3-in-1 reducer (13) at the inlet. The reducer is directly mounted on a transmission shaft 1 (15). The input shaft passes through a sealing flange (14) connected to the ESP inlet casing. A sealing packing is designed at the bottom of the sealing flange to play a role in sealing and dustproofing.

5. The ESP inlet air flow distribution assembly according to claim 4, characterized in that: The transmission shaft 1 (15) is connected to the transmission shaft 2 (17) through the shaft connection flange (16). The transmission shaft 2 (17) is supported by three groups of transmission shaft dedicated support seat 1 (19), support seat 2 (22), and support seat 3 (25). The transmission support seat is fixed on the corresponding swing frame column 3 (10), frame column 2 (11), and frame column 1 (12). Three groups of positive hammers are evenly hung on the transmission shaft 2, namely, vibrating hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24). The three groups of vibrating hammers are respectively installed at positions corresponding to the swing frame columns. Corresponding to the hammer 1 (18), vibrating hammer 2 (21), and vibrating hammer 3 (24) are vibrating anvil 1 (20) installed on the swing frame column 1, vibrating anvil 2 (23) on the swing frame column 2, and vibrating anvil 3 (26) on the swing frame column 3.

6. The ESP inlet air flow distribution assembly according to claim 4, characterized in that: The air distribution plate (27) is made by means of distributed slices. The air distribution plate is made by means of uniform square holes cut from a 10 mm thick plate. The sliced ​​air distribution plate is assembled and installed on the frame column by means of connecting plate bolts to form an integral distribution plate with uniformly distributed circular mesh holes.

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