An ESP inlet airflow distribution component

Abstract

This invention relates to an ESP inlet airflow distribution assembly. Three layers of airflow distribution plates are distributed in ascending order of cross-section on the inlet housing (1). Two sets of rapping devices (6,7) are installed on the first layer airflow distribution plate (2), and a set of rapping devices (8,9) are respectively installed on the upper parts of the second layer airflow distribution plate (3) and the third layer airflow distribution plate (4). A horizontal support (5) for inspecting and repairing the rapping devices is installed on the first and second layers of airflow distribution plates, facilitating the laying of a temporary platform for maintenance and meeting the maintenance needs of the rapping devices and distribution plates of the first, second, and third layers. This innovative design optimizes the inlet airflow distribution plate and rapping devices, achieving high-efficiency, energy-saving, and environmentally friendly production goals. It provides a reference for dry dust collectors in steel plants and has strong practical application value.

Description

Technical Field

[0001] This invention relates to a distribution component, specifically an ESP inlet airflow distribution component, applicable to environmental protection facilities in steel enterprises and other related industrial fields. Background Technology

[0002] Currently, an increasing number of steel plants in China are using dry dust removal technology, also known as LT dust removal technology, in their converter steelmaking processes. The dry (LT) dust removal system mainly consists of an evaporative cooler, an electrostatic precipitator, and a gas cooler. Compared to the traditional converter dust removal system (OG), the main advantages of the LT method are: high dust removal efficiency, with the electrostatic precipitator directly reducing dust concentration to below 10 mg / Nm3, maintaining high efficiency even for fine dust particles smaller than 0.1 μm; the system uses entirely dry processing, eliminating secondary pollution and wastewater treatment; low system resistance, high calorific value of recovered gas, and direct utilization of recovered dust, thus saving energy.

[0003] Electrostatic precipitators (ESPs) are the core component of the LT dust removal system. In the LT steelmaking process, the ESP consists of a cylindrical steel shroud, which, except for the lower section, is entirely insulated. Inside this shroud, four high-voltage electrostatic fields are connected in series, each with multiple parallel gas channels. The principle is that the dust-laden converter gas passes through each electric field. Under the influence of the electrostatic field, gas ions migrate to the grounded cathode electrode, creating a relatively polarized collecting anode plate, which induces a current flow (corona current). These negatively charged gas ions attach to dust particles, causing them to also become charged and attracted to the anode plate. The dust collected in the dry gas deposits on the collecting anode electrode and must be removed by tapping the plate at specified time intervals.

[0004] The following problems exist in the conventional design and use of ESP: (1) The mesh holes of the airflow distribution plate with flanged design, especially the first layer of airflow distribution plate at the inlet, are prone to blockage by more than 1 / 2 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 vibratory hammer has poor ash removal effect and cannot knock off the accumulated ash on the mesh in time; (3) Maintenance and disassembly of the vibrator and distribution plate are inconvenient; (4) The vibrator operates in a long-term working mode, resulting in a high equipment failure rate. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by providing an ESP inlet airflow distribution component. The distribution plate in this solution is arranged at the cylindrical ESP inlet, ensuring uniform distribution of the airflow entering the electric field. The innovation of this solution lies in the optimized design of the inlet airflow distribution plate and the rapping device, achieving high-efficiency, energy-saving, and environmentally friendly production goals. It provides a reference and model for dry dust collectors in steel plants and has strong practical application value.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: An ESP inlet airflow distribution assembly has three layers of airflow distribution plates distributed from small to large in the cross-section of the inlet housing (1). The first layer airflow distribution plate (2) is equipped with an upper vibrating device (6) and two lower sets of vibrating devices (7). The second layer airflow distribution plate (3) has a set of vibrating devices (8) on its upper part, and the third layer airflow distribution plate (4) has a set of vibrating devices (9) on its upper part. For ease of maintenance, a horizontal support (5) for inspecting and correcting the vibrating devices is provided on the first and second layers of airflow distribution plates, facilitating the laying of a temporary platform for maintenance and meeting the maintenance needs of the vibrating devices and distribution plates of the first, second, and third layers of airflow distribution plates.

[0007] Each layer of the airflow distribution plate is horizontally arranged with three vertically mounted swing frame columns three (10), two (11), and one (12) in the middle. A swing mounting pin is set above the swing frame column, which cooperates with the upper U-shaped support to realize the hanging of the column. A positioning sleeve is designed at the lower part of the frame column, which cooperates with the guide column welded to the ESP inlet housing. The design of the cooperation gap limits the swing range.

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

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

[0010] Among them, drive shaft one (15) and drive shaft two (17) are connected by shaft connection flange (16). Drive shaft two (17) is supported by three sets of drive shaft special support seats one (19), support seat two (22), and support seat three (25). The drive support seats are fixed on the corresponding swing frame column three (10), frame column two (11), and frame column one (12). Three sets of positive hammers are evenly distributed on drive shaft two, namely vibrating hammer one (18), vibrating hammer two (21), and vibrating hammer three (24). The three sets of vibrating hammers are installed at the corresponding positions aligned with the swing frame columns. Corresponding to hammer one (18), vibrating hammer two (21), and vibrating hammer three (24) are vibrating anvil one (20), vibrating anvil two (23), and vibrating anvil three (26) installed on swing frame column one, swing frame column two, and swing frame column three.

[0011] After the motor is powered on, the three-in-one geared motor (13) drives the transmission shaft one (15) and the transmission shaft two (17) to rotate. The rotating transmission shaft two drives the vibrating hammer one (18), vibrating hammer one (21), and vibrating hammer one (24) to rotate. When the y successively exceeds its gravity balance point, the vibrating hammer falls onto the corresponding end faces of the vibrating anvil one (20), the vibrating anvil two (23), and the vibrating anvil three (26) according to its own inertia. Under the impact force, the vibrating anvil drives the swing frame column three (10), frame column two (11), and frame column one (12) to be passively impacted. The swaying of the swing frame column three (10), frame column two (11), and frame column one (12) is connected together, and the airflow distribution plate (27) vibrates, and the accumulated dust on it falls off in time.

[0012] The airflow distribution panel is installed using a segmented approach, utilizing the existing overhead mounting holes. The panel is made from 10mm thick plates with uniformly cut square holes. The segmented panels are then connected and bolted together to the frame columns, forming a unified distribution panel with evenly distributed circular mesh holes.

[0013] Compared with the prior art, the present invention has the following advantages: (1) The mesh design of the airflow distribution plate is optimized, the flange design is eliminated, and the thick plate is directly cut into square holes; (2) The vibration system in the airflow distribution plate at the inlet is designed as two sets, one above the other; (3) To increase the vibration force, an enlarged bean sprout-shaped vibration hammer is set, and the weight of the vibration hammer is increased; (4) The logic sequence of vibration is optimized to avoid simultaneous vibration, reduce the dust concentration at the inlet, and prevent the chimney from emitting yellow smoke; (5) In the present invention, two sets of two sets of 360° rotating pendulum vibration devices are set in the airflow distribution plate, which improves the effect of vibration and dust removal and avoids the blockage of the airflow distribution plate. The airflow distribution plate adopts the method of direct wire cutting of the plate holes to avoid dust accumulation and save material usage. In terms of vibration and dust removal timing, we arrange the vibration output to vibrate before and after the oxygen blowing of the converter to avoid the peak value of the dust removal system ESP during the blowing process. The content of dust at the ESP inlet is uniform, and the influence of overload on the dust removal and emission effect of the electric field is eliminated. The newly designed ESP inlet airflow distribution plate has been optimized and improved from the previous device; (6) The vibration timing of this scheme is optimized to ensure the safety and reliability of the transmission. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall layout design of the inlet airflow distribution plate for an electrostatic precipitator;

[0015] Figure 2 This is a schematic diagram of the inlet airflow distribution plate and rapping design for an electrostatic precipitator.

[0016] In the diagram: 1. Inlet housing; 2. First-layer airflow distribution plate; 3. Second-layer airflow distribution plate; 4. Third-layer airflow distribution plate; 5. Horizontal support; 6. Upper vibration device of the first-layer airflow distribution plate; 7. Lower vibration device of the first-layer airflow distribution plate; 10. Upper vibration device of the swing frame column; 8. Vibration device of the second-layer airflow distribution plate; 9. Vibration device of the third-layer airflow distribution plate; 11. Swing frame column II; 12. Swing frame column III; 13. Drive three-in-one geared motor; 14. Sealing flange; 15. Output drive shaft I; 16. Shaft connection flange; 17. Drive shaft II; 18. Vibrating hammer I; 19. Drive shaft support I; 20. Vibrating anvil I; 21. Vibrating hammer II; 22. Drive shaft support II; 23. Vibrating anvil II; 24. Vibrating hammer III; 25. Drive support III; 26. Vibrating anvil III; 27. Airflow distribution plate. Detailed Implementation

[0017] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0018] Example 1: See Figure 1 — Figure 2An ESP inlet airflow distribution assembly has three layers of airflow distribution plates distributed from small to large in the cross-section of the inlet housing (1). The first layer airflow distribution plate (2) has an upper rapping device (6) and two lower rapping devices (7) for rapping. The second layer airflow distribution plate (3) has one rapping device (8), and the third layer airflow distribution plate (4) has one rapping device (9) on its upper part. For ease of maintenance, a horizontal support (5) for inspecting and repairing the rapping device is provided on the first and second layers of airflow distribution plates, facilitating the laying of a temporary platform for maintenance and meeting the maintenance needs of the rapping devices and distribution plates of the first, second, and third layers of airflow distribution plates.

[0019] Each layer of the airflow distribution plate is horizontally arranged with three vertically mounted swing frame columns three (10), two (11), and one (12) in the middle. A swing mounting pin is set above the swing frame column, which cooperates with the upper U-shaped support to realize the hanging of the column. A positioning sleeve is designed at the lower part of the frame column, which cooperates with the guide column welded to the ESP inlet housing. The design of the cooperation gap limits the swing range.

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

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

[0022] Among them, drive shaft one (15) and drive shaft two (17) are connected by shaft connection flange (16). Drive shaft two (17) is supported by three sets of drive shaft special support seats one (19), support seat two (22), and support seat three (25). The drive support seats are fixed on the corresponding swing frame column three (10), frame column two (11), and frame column one (12). Three sets of positive hammers are evenly distributed on drive shaft two, namely vibrating hammer one (18), vibrating hammer two (21), and vibrating hammer three (24). The three sets of vibrating hammers are installed at the corresponding positions aligned with the swing frame columns. Corresponding to hammer one (18), vibrating hammer two (21), and vibrating hammer three (24) are vibrating anvil one (20), vibrating anvil two (23), and vibrating anvil three (26) installed on swing frame column one, swing frame column two, and swing frame column three.

[0023] After the motor is powered on, the three-in-one geared motor (13) drives the transmission shaft one (15) and transmission shaft two (17) to rotate. The rotation of transmission shaft two (17) drives the vibrating hammer one (18), vibrating hammer one (21), and vibrating hammer one (24) to rotate. When the y successively exceeds its gravity equilibrium point, the vibrating hammer falls onto the corresponding end faces of vibrating anvil one (20), vibrating anvil two (23), and vibrating anvil three (26) according to its own weight inertia. Under the impact force, the vibrating anvil drives the swing frame column three (10), frame column two (11), and frame column one (12) to be passively impacted. The swaying of the swing frame column three (10), frame column two (11), and frame column one (12) is connected together, causing the airflow distribution plate (27) to vibrate, and the accumulated dust on it falls off in time.

[0024] The airflow distribution plate (27) is installed using the existing overhead mounting holes in a segmented manner. The airflow distribution plate is made by wire cutting uniform square holes in a 10mm thick plate. The segmented airflow distribution plates are connected and assembled on the frame column using connecting plate bolts to form an overall distribution plate with a uniformly distributed circular mesh.

[0025] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. An ESP inlet airflow distribution component, characterized in that, Three layers of airflow distribution plates are distributed in ascending order of cross-section on the inlet casing (1). A set of upper rapping devices (6) and a set of lower rapping devices (7) are installed on the first layer of airflow distribution plate (2). A set of rapping devices (8) is installed on the upper part of the second layer of airflow distribution plate (3), and a set of rapping devices (9) is installed on the upper part of the third layer of airflow distribution plate (4). A horizontal support (5) for maintenance of the rapping devices is installed on the first and second layers of airflow distribution plates. Each layer of airflow distribution plate is horizontally arranged... Three vertically mounted swinging frame columns three (10), two (11), and one (12) are arranged. Swinging mounting pins are set above the swinging frame columns, and the pins cooperate with the upper U-shaped supports to realize the hanging of the frame columns. A positioning sleeve is designed at the bottom of the frame column, which cooperates with the guide column welded to the ESP inlet housing. The frame columns are connected by connecting plates to assemble the segmented airflow distribution plates (27) into a circle. The vibration device is driven by the inlet three-in-one reducer (13). The reducer is directly mounted on drive shaft one (15). Drive shaft one passes through the sealing flange (14) connected to the ESP inlet housing. The sealing flange is designed with a sealing packing at the bottom to provide a sealing and dustproof function. Drive shaft one (15) and drive shaft two (17) are connected by a shaft connection flange (16). Drive shaft two (17) is supported by three sets of dedicated drive shaft support seats one (19), support seat two (22), and support seat three (25). The drive support seats are fixed to the corresponding swing frame column three (10). On frame column 2 (11) and frame column 1 (12), three sets of vibrating hammers are evenly distributed on the drive shaft 2. They are vibrating hammer 1 (18), vibrating hammer 2 (21) and vibrating hammer 3 (24). The three sets of vibrating hammers are installed at positions corresponding to the swing frame column. Corresponding to vibrating hammer 1 (18), vibrating hammer 2 (21) and vibrating hammer 3 (24) are vibrating anvil 1 (20) installed on swing frame column 1, vibrating anvil 2 (23) on swing frame column 2 and vibrating anvil 3 (26) on swing frame column 3.

2. The ESP inlet airflow distribution assembly according to claim 1, characterized in that, The airflow distribution plate (27) is made by dividing the airflow into sections. The airflow distribution plate is made by cutting uniform square holes in a 10mm thick plate. The sections of the airflow distribution plate are connected and assembled on the frame column by connecting plate bolts to form a circular uniformly distributed mesh plate.

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