Electrostatic dust collection system and method for sintering machine head

Abstract

The invention relates to the field of sintering machine head electrostatic dust collection, and provides a sintering machine head electrostatic dust collection system which comprises an airflow homogenization unit, an electric field dust collection unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector. The airflow homogenization unit is arranged in front of the electric field dust removal unit; the high-frequency pulse power supply unit is in signal connection with the electric field dedusting unit; the intelligent control unit is in signal connection with the electric field dedusting unit and used for controlling the voltage of the electric field dedusting unit; the dust concentration detector is arranged at the outlet position of the electric field dust removal unit, and is used for detecting the outlet dust concentration of the flue gas at the outlet position of the electric field dust removal unit and sending the outlet dust concentration to the intelligent control unit; the intelligent control unit is in signal connection with the high-frequency pulse power supply unit, and when the outlet dust concentration is larger than 20 mg / Nm, the pulse mode of the high-frequency pulse unit is activated, the invention further provides an electrostatic dust collection method for the sintering machine head, and the effect of improving the electrostatic dust collection efficiency and effect is achieved.

Description

Technical Field

[0001] The present application relates to the field of electrostatic dust removal for sintering machine heads, and in particular to a system and method for electrostatic dust removal for sintering machine heads. Background Art

[0002] Sintering is a crucial step in the steel industry's production process. This process transforms various powdered iron-containing raw materials into lumps or pellets of sintered ore, providing high-quality raw material for subsequent ironmaking. However, this process also presents serious environmental concerns. The flue gas generated during the sintering process contains large amounts of pollutants such as dust, sulfur oxides, and nitrogen oxides. If these pollutants are not effectively treated and released directly into the atmosphere, they pose a significant threat to the environment and human health.

[0003] In the past, various methods were commonly used both domestically and internationally to treat dust in sintering flue gas. Among them, the electrostatic precipitator (ESP) is a widely used device. It primarily uses a high-voltage electric field to charge dust particles in the flue gas, which are then collected on electrodes under the action of the electric field. This method can remove a significant portion of dust from the flue gas, offering advantages such as high throughput and low resistance. Bag filters are also commonly used. They filter dust from the flue gas through filter bags, achieving efficient dust removal through the dust layer formed on the bag surface. Furthermore, other auxiliary methods complement these primary dust removal devices, such as simple pretreatment devices, to adjust the flue gas condition and optimize the dust collector's effectiveness. For a period of time, these devices and methods met the steel industry's basic needs for sintering flue gas dust removal.

[0004] However, with increasingly stringent environmental protection standards, such as my country's "Steel Industry Air Pollutant Emission Standards" which clearly stipulate the emission limits of particulate matter, traditional dust removal technologies have begun to expose shortcomings in processing efficiency and effectiveness. Summary of the Invention

[0005] In order to improve the efficiency and effect of electrostatic dust removal, the present application provides a sintering machine head electrostatic dust removal system and method.

[0006] On the one hand, the present application provides a sintering machine head electrostatic dust removal system adopts the following technical solutions: A sintering machine head electrostatic dust removal system includes an airflow homogenization unit, an electric field dust removal unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector; the airflow homogenization unit is arranged before the electric field dust removal unit; the high-frequency pulse power supply unit signal is connected to the electric field dust removal unit; the intelligent control unit signal is connected to the electric field dust removal unit for controlling the voltage of the electric field dust removal unit; the dust concentration detector is arranged at the outlet position of the electric field dust removal unit, and the dust concentration detector is used to detect the outlet dust concentration of the flue gas at the outlet position of the electric field dust removal unit and send the outlet dust concentration to the intelligent control unit; the intelligent control unit signal is connected to the high-frequency pulse power supply unit, and when the outlet dust concentration is greater than 20mg / Nm³, the pulse mode of the high-frequency pulse unit is activated.

[0007] By adopting the above technical solutions, the airflow homogenization unit can evenly distribute the airflow entering the system, facilitating subsequent processing; the electric field dust removal unit performs electric field dust removal on the flue gas from the sintering machine head; the high-frequency pulse power supply unit supplies power to the electric field dust removal unit to enhance the dust removal effect; the dust concentration detector detects the dust concentration at the outlet of the electric field dust removal unit in real time; the intelligent control unit activates the pulse mode of the high-frequency pulse unit when the outlet dust concentration is greater than 20mg / Nm³, further improving the dust removal efficiency, effectively solving the efficiency improvement bottleneck problem faced by traditional dust removal technology, and meeting increasingly stringent environmental protection standards.

[0008] Optionally, the electric field dust removal unit is a three-electric field configuration.

[0009] By adopting the above technical solution and setting the electric field dust removal unit to a three-electric field configuration, the dust removal efficiency of the sintering machine head electrostatic dust removal system can be improved, and it can better adapt to increasingly stringent environmental protection standards.

[0010] Optionally, the electric field dust removal unit includes a first electric field, a second electric field and a third electric field; the basic voltage of the first electric field is 40KV, the basic voltage of the second electric field is 50KV, and the basic voltage of the third electric field is 60KV.

[0011] By adopting the above technical solution, the electric field dust removal unit of the sintering machine head electrostatic dust removal system adopts a three-electric field configuration, and each electric field is set with a different basic voltage, which can improve the dust removal efficiency of sintering flue gas, break through the efficiency improvement bottleneck of traditional dust removal technology, and meet increasingly stringent environmental protection standards.

[0012] Optionally, the electric field dust removal unit includes an anode plate and a cathode wire; the anode plate includes a plurality of 480C corrugated plates, and the cathode wire includes a plurality of RSB barb wires; the spacing between adjacent 480C corrugated plates is 400±10mm, and the spacing between adjacent RSB barb wires is 200mm, and the plurality of RSB barb wires are arranged in a triangle.

[0013] By adopting this technical solution, using multiple 480C corrugated plates as anodes and multiple RSB barbed wires as cathodes, along with appropriate spacing and triangular arrangement, the dust removal efficiency of the electrostatic dust removal system at the sintering machine head can be improved. Furthermore, the system, consisting of an airflow homogenization unit, an electric field dust removal unit, a high-frequency pulse power supply unit, an intelligent control unit, and a dust concentration detector, intelligently adjusts the electric field voltage based on the outlet dust concentration, further enhancing the dust removal effectiveness of the entire system.

[0014] Optionally, the output peak voltage of the high-frequency pulse power supply unit is 80KV, and the duty cycle is 15%-30%.

[0015] By adopting the above technical solution, the electrostatic dust removal system includes an airflow homogenization unit, an electric field dust removal unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector. The high-frequency pulse power supply unit signal is connected to the electric field dust removal unit, the intelligent control unit controls the voltage of the electric field dust removal unit, and the dust concentration detector detects the outlet dust concentration and feeds back to the intelligent control unit. When the outlet dust concentration is greater than 20mg / Nm³, the pulse mode of the high-frequency pulse unit is activated. At the same time, the high-frequency pulse power supply unit outputs a peak voltage of 80kV and a duty cycle of 15% to 30%, which can effectively improve the dust removal efficiency, break through the efficiency improvement bottleneck of traditional dust removal technology, and enable the treatment of sintering machine head flue gas to meet increasingly stringent environmental protection standards.

[0016] Optionally, the airflow homogenizing unit includes guide blades and a porous distribution plate arranged in sequence, the porous distribution plate is evenly provided with a plurality of through holes, and the opening rate of the porous distribution plate is greater than 40%.

[0017] By adopting the above technical solution, an airflow homogenization unit is set in the electrostatic dust removal system of the sintering machine head. By using the guide blades arranged in sequence and the porous distribution plate with an opening rate greater than 40% and a number of evenly arranged through holes, the airflow of the sintering flue gas entering the system can be homogenized, which improves the efficiency bottleneck problem of traditional dust removal technology and helps to improve the overall dust removal efficiency.

[0018] Optionally, the porous distribution plate includes a first plate and a second plate, and the second plate can be translated relative to the first plate along the plate surface direction of the first plate; the through hole includes a first hole and a second hole, the first hole is arranged on the first plate, and the second hole is arranged on the second plate; a first cleaning piece is arranged in the first hole, and the first cleaning piece is slidably connected to the hole wall of the first hole along the length direction of the first hole, and the first cleaning piece abuts against the first hole wall; a second cleaning piece is arranged in the second hole, and the second cleaning piece is slidably connected to the hole wall of the second hole along the length direction of the second hole, and the second cleaning piece abuts against the second hole wall; the first cleaning piece is connected to a pull rope, and the other end of the pull rope is connected to the second cleaning piece; the first hole wall is provided with a first reset piece, and the first reset piece forces the first cleaning piece to be located at one end of the first hole away from the second plate; the second hole wall is provided with a second reset piece, and the second reset piece forces the second cleaning piece to be located at one end of the second hole away from the second plate.

[0019] By adopting the above technical solution, the guide vanes and porous distribution plates of the airflow homogenization unit are utilized to evenly distribute the flue gas flow entering the system; the electric field dust removal unit can remove dust from the flue gas; the high-frequency pulse power supply unit supplies power to the electric field dust removal unit; the intelligent control unit controls the voltage of the electric field dust removal unit, and according to the outlet dust concentration detected by the dust concentration detector, activates the pulse mode of the high-frequency pulse unit when the outlet dust concentration is greater than 20mg / Nm³ to optimize the dust removal effect; at the same time, the first plate and the second plate of the porous distribution plate can be relatively translated, and the first hole and the second hole are respectively provided with a first cleaning part and a second cleaning part, which are connected by a pull rope and cooperate with the first reset part and the second reset part to clean the hole walls of the first hole and the second hole to prevent blockage of the hole channel, thereby ensuring the airflow homogenization effect and stable operation of the system.

[0020] Optionally, the porous distribution plate includes a first plate and a second plate, the first plate and the second plate are arranged opposite to each other, and the first plate can be closer to or farther away from the second plate; the through hole includes a first hole and a second hole, the first hole is arranged in the first plate, and the second hole is arranged in the second plate; the first hole and the second hole are staggered; a first cleaning piece is provided on the surface of the first plate facing the second plate, and the first cleaning piece is extended along the length direction of the second hole; a second cleaning piece is provided on the surface of the second plate facing the first plate, and the second cleaning piece is extended along the length direction of the first hole; when the first plate approaches the second plate, the first cleaning piece is gradually inserted into the second hole, and the second cleaning piece is gradually inserted into the first hole.

[0021] By adopting the above technical solution, the airflow homogenization unit can make the flue gas airflow entering the electric field dust removal unit more uniform, the high-frequency pulse power supply unit can provide power for the electric field dust removal unit, the intelligent control unit can control the voltage of the electric field dust removal unit, the dust concentration detector can detect the outlet dust concentration and feed back to the intelligent control unit, and when the outlet dust concentration is greater than 20 mg / Nm³, the pulse mode of the high-frequency pulse unit is activated. The porous distribution plate adopts a first plate and a second plate arranged relative to each other, and the first plate can be close to or away from the second plate, the first hole and the second hole are staggered, the first plate is provided with a first cleaning part, and the second plate is provided with a second cleaning part. When the first plate approaches the second plate, the cleaning part is inserted into the opposite hole, which can automatically clean the dust deposited on the porous distribution plate, avoid the airflow homogenization effect due to dust accumulation, and ensure the stable and efficient operation of the entire sintering machine head electrostatic dust removal system.

[0022] On the other hand, the present application provides a method for electrostatic dust removal of a sintering machine head using the following technical solution: A sintering machine head electrostatic dust removal method comprises the following steps: S1: Check the insulator chamber heating system before starting (maintain 120°C); S2: Start the induced draft fan first and then the dust collector, and perform a no-load voltage boost test; S3: Set the basic voltage of the electric field dust removal unit; S4: Pulse mode is activated when the dust concentration is greater than 20 mg / Nm³.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. By connecting the electric field dust removal unit signal to the high-frequency pulse power supply unit, installing a dust concentration detector at the outlet of the electric field dust removal unit, and setting up an intelligent control unit, the electric field dust removal unit and the high-frequency pulse power supply unit are both connected to the intelligent control device. When the dust concentration detector detects that the outlet dust concentration is greater than 20mg / Nm³, the intelligent control unit activates the pulse mode of the high-frequency pulse power supply unit to enhance the dust removal ability of the electric field. Compared with traditional dust removal technology, this improves dust removal efficiency and stability, and reduces pollution to the environment; 2. The electric field dust removal unit of the electrostatic dust removal system of the sintering machine head adopts a three-field configuration, and each field is set with a different basic voltage. This can improve the dust removal efficiency of sintering flue gas, break through the efficiency improvement bottleneck of traditional dust removal technology, and meet increasingly stringent environmental protection standards; 3. The porous distribution plate includes a first plate and a second plate. The first plate can move relative to the second plate. During the movement, the first cleaning part and the second cleaning part are driven to clean the first hole and the second hole, thereby extending the service life of the porous distribution plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of Example 1 of the present application.

[0025] Figure 2 It is a schematic diagram for showing the status of signal connection in Example 1.

[0026] Figure 3 It is a schematic diagram for showing the structure of the airflow homogenization unit in Example 1.

[0027] Figure 4 It is a schematic diagram for showing the structure of the electric field dust removal unit in Example 1.

[0028] Figure 5 It is a structural diagram of Example 2 of the present application.

[0029] Figure 6 yes Figure 5 An enlarged schematic diagram in part A.

[0030] Figure 7 It is a schematic diagram for showing the structure of the second plate after it moves relative to the first plate in Example 2.

[0031] Figure 8 It is a structural diagram of Example 3 of the present application.

[0032] Figure 9 It is a schematic diagram for showing the structure of the second plate after it moves relative to the first half in Example 3.

[0033] Explanation of the accompanying drawings: 1. Air flow homogenization unit; 11. Guide vane; 12. Porous distribution plate; 13. First plate; 14. Second plate; 15. Through hole; 16. First hole; 161. First cleaning part; 162. First reset part; 17. Second hole; 171. Second cleaning part; 172. Second reset part; 18. Pull rope; 2. Electric field dust removal unit; 21. Anode plate; 22. Cathode line; 3. High-frequency pulse power supply unit; 4. Intelligent control unit; 5. Dust concentration detector. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-9 This application is described in further detail.

[0035] The embodiments of the present application disclose an electrostatic dust removal system and method for a sintering machine head.

[0036] Example 1 Reference Figure 1-4This embodiment provides an electrostatic dust removal system for a sintering machine head, comprising an airflow homogenization unit 1, an electric field dust removal unit 2, a high-frequency pulse power supply unit 3, an intelligent control unit 4, and a dust concentration detector 5. The airflow homogenization unit 1 is arranged before the electric field dust removal unit 2 to perform a uniform speed processing on the airflow entering the electric field dust removal unit 2. The high-frequency pulse power supply unit 3 is signal-connected to the electric field dust removal unit 2 to provide a suitable power supply for the electric field dust removal unit 2. The intelligent control unit 4 is signal-connected to the electric field dust removal unit 2 and the high-frequency pulse power supply unit 3 to control the voltage of the electric field dust removal unit 2 and activate the pulse mode of the high-frequency pulse power supply unit 3 according to the dust concentration. The dust concentration detector 5 is arranged at the outlet position of the electric field dust removal unit 2, and sends the detected outlet dust concentration to the intelligent control unit 4 to realize intelligent regulation of the dust removal process, thereby achieving the effect of efficiently reducing the dust content in the sintering flue gas and meeting environmental protection standards. Through the coordinated work between the various units, the electric field strength can be monitored and adjusted in real time to enhance the dust removal effect. At the same time, the airflow homogenization unit 1 can also make the airflow entering the electric field more uniform, thereby improving the utilization rate of the electric field.

[0037] Specifically, the airflow homogenization unit 1 includes a guide blade 11 and a porous distribution plate 12 arranged in sequence. The porous distribution plate 12 is evenly provided with a number of through holes 15, and its opening rate is greater than 40%. There are multiple guide blades 11, and the guide blades 11 extend along the flow velocity direction of the airflow. The multiple guide blades 11 are evenly arranged in a direction perpendicular to their own axis. The guide blades 11 are usually made of metal material with good corrosion resistance and mechanical strength. They can be shaped like curved thin plates and are installed near the air inlet of the system by welding or bolting. They are used to change the direction of the airflow so that the airflow flows more evenly to the porous distribution plate 12. Alternatively, the guide blades 11 can also be made of plastic material, which can reduce weight while meeting certain strength requirements.

[0038] The porous distribution plate 12 is made of stainless steel, with holes 15 formed through CNC machining to ensure uniformity and precision. Alternatively, aluminum can be used to make the porous distribution plate 12. The guide vanes 11 are secured to the porous distribution plate 12 through welding or flange connections. The guide vanes 11 guide the airflow onto the porous distribution plate 12, further homogenizing the airflow.

[0039] The electric field dust removal unit 2 is a three-electric field configuration, including a first electric field, a second electric field and a third electric field. The basic voltage of the first electric field is 40KV, the basic voltage of the second electric field is 50KV, and the basic voltage of the third electric field is 60KV.

[0040] The electric field dust removal unit 2 also includes an anode plate 21 and a cathode wire 22. The anode plate 21 includes a plurality of 480C corrugated plates, and the cathode wire 22 includes a plurality of RSB barb wires. The 480C corrugated plate is made of carbon steel, and the surface is galvanized to enhance corrosion resistance. Its corrugated shape can increase the adsorption area of ​​dust. The RSB barb wire is usually made of stainless steel, and the barb shape is sharp, which can produce strong corona discharge. The spacing between adjacent 480C corrugated plates is 400±10mm, and the spacing between adjacent RSB barb wires is 200mm. Multiple RSB barb wires are arranged in a triangle. Such a layout can make the electric field distribution more uniform and improve the dust removal efficiency. The anode plate 21 and the cathode wire 22 are installed inside the electric field through a suspension device, maintaining a certain spacing and relative position.

[0041] The high-frequency pulse power supply unit 3 has an output peak voltage of 80 kV and a duty cycle of 15% to 30%. It primarily consists of a transformer, a rectifier, and a pulse generator. The transformer boosts the input voltage, the rectifier converts AC power to DC, and the pulse generator generates high-frequency pulse signals. Its modular design facilitates installation and maintenance. Alternatively, an integrated power supply module can be used. The high-frequency pulse power supply unit 3 is connected to the electric field dust removal unit 2 via a cable, providing the appropriate pulse voltage for the electric field, enhancing the dust removal effect.

[0042] Intelligent control unit 4 can be a PLC controller with a high-performance processor and a variety of input and output interfaces. It can receive data from dust concentration detector 5 in real time and control the voltage of electric field dust removal unit 2 and the pulse mode of high-frequency pulse power supply unit 3 according to a preset program. Intelligent control unit 4 is connected to electric field dust removal unit 2, high-frequency pulse power supply unit 3 and dust concentration detector 5 via data cables to realize data transmission and the sending of control instructions.

[0043] Dust concentration detector 5 typically uses laser scattering or capacitive sensing principles to quickly and accurately detect dust concentration at the outlet. Its housing is made of stainless steel, offering excellent protection, and is secured to the outlet of electric field dust removal unit 2 via a mounting bracket.

[0044] This embodiment also provides a sintering die head electrostatic dust removal method, which is applied to the above-mentioned sintering die head electrostatic dust removal system, comprising the following steps: S1: Check the insulator chamber heating system before starting (maintain 120°C); S2: Start the induced draft fan first and then the dust collector, and perform a no-load voltage boost test; S3: Set the base voltage of the first electric field to 40kV, the second electric field to 50kV, and the third electric field to 60kV; S4: Pulse mode is activated when the dust concentration is greater than 20 mg / Nm³.

[0045] The implementation principle of Example 1 is as follows: the sintering flue gas first passes through the airflow homogenization unit 1, the guide vanes 11 and the porous distribution plate 12 to homogenize the airflow, and then enters the electric field dust removal unit 2. The electric field dust removal unit 2 generates an electric field under the power supply of the high-frequency pulse power supply unit 3, so that the dust is charged and collected on the anode plate 21. The dust concentration detector 5 monitors the outlet dust concentration in real time and sends the data to the intelligent control unit 4. When the outlet dust concentration is greater than 20 mg / Nm³, the intelligent control unit 4 activates the pulse mode of the high-frequency pulse power supply unit 3 to enhance the dust removal ability of the electric field. Through the coordinated work of each unit, the entire system effectively reduces the dust content in the sintering flue gas, meets the requirements of environmental protection standards, and improves the dust removal efficiency and stability compared with traditional dust removal technology, reducing pollution to the environment.

[0046] Example 2 Reference Figure 5 and Figure 7 The difference between this embodiment and embodiment 1 is that the porous distribution plate 12 includes a first plate 13 and a second plate 14 , and the second plate 14 can translate relative to the first plate 13 along the plate surface direction of the first plate 13 .

[0047] The through hole 15 includes a first hole 16 and a second hole 17. The first hole 16 is provided in the first plate 13, and the second hole 17 is provided in the second plate 14. A first cleaning member 161 is provided in the first hole 16. The first cleaning member 161 is slidably connected to the hole wall of the first hole 16 along the length of the first hole 16, and the first cleaning member 161 abuts the wall of the first hole 16. The second cleaning member 17 is provided in the second hole 17. The second cleaning member is slidably connected to the hole wall of the second hole 17 along the length of the second hole 17, and the second cleaning member 171 abuts the wall of the second hole 17.

[0048] The first cleaning member 161 is connected to a pull rope 18, and the other end of the pull rope 18 is connected to the second cleaning member. A first reset member 162 is provided on the wall of the first hole 16, and the first reset member 162 forces the first cleaning member 161 to be located at the end of the first hole 16 away from the second plate 14; a second reset member 172 is provided on the wall of the second hole 17, and the second reset member 172 forces the second cleaning member 171 to be located at the end of the second hole 17 away from the second plate 14. The first cleaning member 161 and the second cleaning member 171 are generally made of rubber material, which has good elasticity and wear resistance, can fit tightly to the hole wall, and effectively remove attached dust. The pull rope 18 can be a steel wire rope or a nylon rope to ensure a certain strength and flexibility. The first reset member 162 and the second reset member 172 can be springs, one end of the spring is fixed to the hole wall, and the other end is connected to the cleaning member. When the second plate 14 translates relative to the first plate 13, the pull rope 18 drives the first cleaning member 161 and the second cleaning member 171 to slide in their respective holes to remove dust on the hole walls, and the spring ensures that the cleaning ring can return to its original position after moving.

[0049] Example 3 Reference Figure 8 and Figure 9 The difference between this embodiment and embodiment 1 is that the porous distribution plate 12 includes a first plate 13 and a second plate 14. The first plate 13 and the second plate 14 are arranged opposite each other, and the first plate 13 can move closer to or farther away from the second plate 14. The through holes 15 include a first hole 16 and a second hole 17. The first hole 16 is arranged in the first plate 13, and the second hole 17 is arranged in the second plate 14. The first hole 16 and the second hole 17 are arranged in an alternating manner. A first cleaning member 161 is provided on the surface of the first plate 13 facing the second plate 14. The first cleaning member 161 extends along the length of the second hole 17. The second cleaning member 171 is provided on the surface of the second plate 14 facing the first plate 13. The second cleaning member 171 extends along the length of the first hole 16. When the first plate 13 approaches the second plate 14, the first cleaning member 161 gradually inserts into the second hole 17, and the second cleaning member 171 gradually inserts into the first hole 16. The first cleaning member 161 and the second cleaning member 171 can be brushes or scrapers, made of nylon or rubber, with good flexibility and wear resistance. The first plate 13 and the second plate 14 can achieve relative movement through a driving device such as an electric push rod.

[0050] The operating principle of Example 3 is as follows: When sintering flue gas passes through the porous distribution plate 12, dust adheres to the hole walls. When the first plate 13 and the second plate 14 move relative to each other, the first cleaning member 161 and the second cleaning member 171 are inserted into the holes of each other to remove dust from the hole walls. This cleaning method can more effectively prevent hole blockage and ensure the airflow homogenization effect of the porous distribution plate 12, thereby further improving the dust removal efficiency and stability of the entire electrostatic precipitator system, meeting the strict environmental protection standards for sintering flue gas dust emissions. Compared with traditional porous distribution plate 12 cleaning methods, it is more flexible and efficient, reducing the workload of manual maintenance.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sintering machine head electrostatic dust removal system, characterized by: The invention comprises an air flow homogenizing unit (1), an electric field dust removal unit (2), a high-frequency pulse power supply unit (3), an intelligent control unit (4) and a dust concentration detector (5); the air flow homogenizing unit (1) is arranged before the electric field dust removal unit (2); the high-frequency pulse power supply unit (3) is connected to the electric field dust removal unit (2) by signal; the intelligent control unit (4) is connected to the electric field dust removal unit (2) by signal and is used to control the voltage of the electric field dust removal unit (2); the dust concentration detector (5) is arranged at the outlet position of the electric field dust removal unit (2), and is used to detect the outlet dust concentration of the flue gas at the outlet position of the electric field dust removal unit (2) and send the outlet dust concentration to the intelligent control unit (4); the intelligent control unit (4) is connected to the high-frequency pulse power supply unit (3) by signal, and activates the pulse mode of the high-frequency pulse unit when the outlet dust concentration is greater than 20 mg / Nm³.

2. The electrostatic dust removal system for a sintering machine head according to claim 1, characterized in that: The electric field dust removal unit (2) is a three-electric field configuration.

3. The electrostatic dust removal system for a sintering machine head according to claim 2, characterized in that: The electric field dust removal unit (2) comprises a first electric field, a second electric field and a third electric field; the basic voltage of the first electric field is 40KV, the basic voltage of the second electric field is 50KV, and the basic voltage of the third electric field is 60KV.

4. The electrostatic dust removal system for a sintering machine head according to any one of claims 1 to 3, characterized in that: The electric field dust removal unit (2) comprises an anode plate (21) and a cathode line (22); the anode plate (21) comprises a plurality of 480C type corrugated plates, and the cathode line (22) comprises a plurality of RSB barb wires; the spacing between adjacent 480C type corrugated plates is 400±10 mm, the spacing between adjacent RSB barb wires is 200 mm, and the plurality of RSB barb wires are arranged in a triangular shape.

5. The electrostatic dust removal system for a sintering machine head according to claim 1, characterized in that: The output peak voltage of the high-frequency pulse power supply unit (3) is 80KV, and the duty cycle is 15%-30%.

6. The electrostatic dust removal system for a sintering machine head according to claim 1, characterized in that: The airflow homogenizing unit (1) comprises a guide vane (11) and a porous distribution plate (12) arranged in sequence, wherein the porous distribution plate (12) is evenly provided with a plurality of through holes (15), and the opening rate of the porous distribution plate (12) is greater than 40%.

7. The electrostatic dust removal system for a sintering machine head according to claim 6, characterized in that: The porous distribution plate (12) comprises a first plate (13) and a second plate (14), wherein the second plate (14) is capable of translational movement relative to the first plate (13) along the plate surface direction of the first plate (13); the through hole (15) comprises a first hole (16) and a second hole (17), wherein the first hole (16) is provided on the first plate (13), and the second hole (17) is provided on the second plate (14); A first cleaning member is provided in the first hole (16), and the first cleaning member is connected to the hole wall of the first hole (16) by sliding along the length direction of the first hole (16), and the first cleaning member abuts against the wall of the first hole (16); a second cleaning member is provided in the second hole (17), and the second cleaning member is connected to the hole wall of the second hole (17) by sliding along the length direction of the second hole (17), and the second cleaning member abuts against the wall of the second hole (17); the first cleaning member is connected to a pull rope (18), and the other end of the pull rope (18) is connected to the second cleaning member; a first reset member (162) is provided on the wall of the first hole (16), and the first reset member (162) forces the first cleaning member to be located at one end of the first hole (16) away from the second plate (14); a second reset member (172) is provided on the wall of the second hole (17), and the second reset member (172) forces the second cleaning member to be located at one end of the second hole (17) away from the second plate (14).

8. The electrostatic dust removal system for a sintering machine head according to claim 1, characterized in that: The porous distribution plate (12) comprises a first plate (13) and a second plate (14), the first plate (13) and the second plate (14) are arranged opposite to each other, and the first plate (13) can be close to or far away from the second plate (14); the through hole (15) comprises a first hole (16) and a second hole (17), the first hole (16) is arranged on the first plate (13), and the second hole (17) is arranged on the second plate (14); the first hole (16) and the second hole (17) are arranged staggered; A first cleaning piece (161) is provided on the surface of the first plate (13) facing the second plate (14), and the first cleaning piece (161) is extended along the length direction of the second hole (17); a second cleaning piece (171) is provided on the surface of the second plate (14) facing the first plate (13), and the second cleaning piece (171) is extended along the length direction of the first hole (16); when the first plate (13) approaches the second plate (14), the first cleaning piece (161) is gradually inserted into the second hole (17), and the second cleaning piece (171) is gradually inserted into the first hole (16).

9. A sintering die head electrostatic dust removal method, applied to a sintering die head electrostatic dust removal system according to any one of claims 1 to 8, characterized in that: The steps include: S1: Check the insulator chamber heating system before starting (maintain 120°C); S2: Start the induced draft fan first and then the dust collector, and perform a no-load voltage boost test; S3: Setting the basic voltage of the electric field dust removal unit (2); S4: Pulse mode is activated when the dust concentration is greater than 20 mg / Nm³.

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