Sintering machine head electrostatic dust removal system and method

Abstract

The application relates to the field of sintering machine head electrostatic dust removal, and provides a sintering machine head electrostatic dust removal system which comprises an airflow homogenizing 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 homogenizing unit is arranged before the electric field dust removal unit; the high-frequency pulse power supply unit is signal-connected to the electric field dust removal unit; the intelligent control unit is signal-connected to the electric field dust removal unit and used for controlling the voltage of the electric field dust removal unit; the dust concentration detector is arranged at an outlet position of the electric field dust removal unit, the dust concentration detector is used for detecting the outlet dust concentration of 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 signal-connected to the high-frequency pulse power supply unit, and when the outlet dust concentration is greater than 20 mg / Nm3, the pulse mode of the high-frequency pulse unit is activated; a sintering machine head electrostatic dust removal method is also provided; and the application has the effects of improving the efficiency and effect of electrostatic dust removal.

Description

TECHNICAL FIELD

[0001] The present application designs the field of electrostatic precipitation of sintering machine head, and particularly relates to an electrostatic precipitation system and method of sintering machine head. BACKGROUND

[0002] In the production process of the steel industry, the sintering process is one of the most important links. The sintering process can turn various powdery iron-containing raw materials into blocky or spherical sintered ore, providing high-quality raw materials for the subsequent ironmaking process. However, this process also brings serious environmental problems. The flue gas generated in the sintering process contains a large amount of dust, sulfur oxides, nitrogen oxides and other pollutants. If these pollutants are directly discharged into the atmosphere without effective treatment, they will cause great harm to the environment and human health.

[0003] In the past, various methods have been widely used at home and abroad to treat dust in sintering flue gas. Among them, the electric precipitator (ESP) is a widely used device. It mainly uses high-voltage electric field to charge the dust in the flue gas, and then collects the dust on the electrode under the action of electric field force. This method can remove most of the dust in the flue gas to some extent, and has the advantages of large treatment capacity and small resistance. In addition, the bag-type dust collector is also a commonly used dust removal device, which filters the dust in the flue gas through the filter bag and relies on the dust layer formed on the surface of the filter bag to achieve efficient dust removal. In addition, there are some other auxiliary means to cooperate with these main dust removal devices, such as some simple pretreatment devices to adjust the state of the flue gas so as to better play the role of the dust collector. These devices and means meet the basic needs of the steel industry for sintering flue gas dust removal in a certain period of time.

[0004] However, with the increasingly stringent environmental standards, such as the clear provisions of the Emission Standard of Air Pollutants for Iron and Steel Industry on particulate matter emission limits, the traditional dust removal technology has begun to expose its shortcomings in terms of treatment efficiency and effect. SUMMARY

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

[0006] On the one hand, the electrostatic precipitation system of sintering machine head provided by the present application adopts the following technical scheme:

[0007] The sintering machine head electrostatic dust removal system comprises an airflow homogenizing 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 homogenizing unit is arranged before the electric field dust removal unit; the high-frequency pulse power supply unit is signal connected to the electric field dust removal unit; the intelligent control unit is signal connected to the electric field dust removal unit and is used 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 is used for detecting the outlet dust concentration of 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 signal connected to the high-frequency pulse power supply unit, and when the outlet dust concentration is greater than 20 mg / Nm3, the pulse mode of the high-frequency pulse unit is activated.

[0008] By adopting the technical scheme, the airflow homogenizing unit can make the airflow entering the system uniformly distributed, facilitating subsequent processing; the electric field dust removal unit performs electric field dust removal on the sintering machine head flue gas; the high-frequency pulse power supply unit supplies power for the electric field dust removal unit, enhancing 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; and the intelligent control unit activates the pulse mode of the high-frequency pulse unit when the outlet dust concentration is greater than 20 mg / Nm3 according to the outlet dust concentration, further improving the dust removal efficiency, effectively solving the efficiency bottleneck problem faced by traditional dust removal technology and meeting the increasingly stringent environmental protection standards.

[0009] Optionally, the electric field dust removal unit is in a three-electric-field configuration.

[0010] By adopting the technical scheme, the electric field dust removal unit is arranged in a three-electric-field configuration, which can improve the dust removal efficiency of the sintering machine head electrostatic dust removal system and better adapt to the increasingly stringent environmental protection standards.

[0011] Optionally, the electric field dust removal unit comprises a first electric field, a second electric field and a third electric field; the basic voltage of the first electric field is 40 KV, the basic voltage of the second electric field is 50 KV, and the basic voltage of the third electric field is 60 KV.

[0012] By adopting the technical scheme, the electric field dust removal unit of the sintering machine head electrostatic dust removal system is in a three-electric-field configuration, and each electric field is set to have different basic voltages, which can improve the dust removal efficiency of sintering flue gas, break through the efficiency bottleneck of traditional dust removal technology and meet the increasingly stringent environmental protection standards.

[0013] Optionally, the electric field dust removal unit comprises an anode plate and a cathode wire; the anode plate comprises a plurality of 480C type corrugated plates, and the cathode wire comprises a plurality of RSB thorn wires; the spacing between adjacent 480C type corrugated plates is 400±10 mm, the spacing between adjacent RSB thorn wires is 200 mm, and the plurality of RSB thorn wires are arranged in a triangular arrangement.

[0014] By adopting the above technical scheme, the 480C type corrugated plate is used as the anode plate and the RSB thorn wire is used as the cathode wire, and appropriate spacing and triangular arrangement are provided, so that the dust removal efficiency of the sintering machine head electrostatic dust removal system can be improved. At the same time, the system composed of the airflow homogenization unit, the electric field dust removal unit, the high-frequency pulse power supply unit, the intelligent control unit and the dust concentration detector can intelligently adjust the electric field voltage according to the outlet dust concentration, and further enhance the dust removal effect of the whole system.

[0015] Optionally, the output peak voltage of the high-frequency pulse power supply unit is 80KV, and the duty cycle is 15%-30%.

[0016] By adopting the above technical scheme, the electrostatic dust removal system comprises the airflow homogenization unit, the electric field dust removal unit, the high-frequency pulse power supply unit, the intelligent control unit and the dust concentration detector, the high-frequency pulse power supply unit is signal connected to the electric field dust removal unit, the intelligent control unit controls the voltage of the electric field dust removal unit, the dust concentration detector detects the outlet dust concentration and feeds back to the intelligent control unit, the pulse mode of the high-frequency pulse unit is activated when the outlet dust concentration is greater than 20mg / Nm³, the output peak voltage of the high-frequency pulse power supply unit is 80KV, and the duty cycle is 15%-30%, which can effectively improve the dust removal efficiency, break through the efficiency bottleneck of traditional dust removal technology, and make the treatment of sintering machine head flue gas meet the increasingly strict environmental protection standards.

[0017] Optionally, the airflow homogenization unit comprises a guide vane and a porous distribution plate arranged in sequence, the porous distribution plate is uniformly provided with a plurality of through holes, and the opening rate of the porous distribution plate is greater than 40%.

[0018] By adopting the above technical scheme, the airflow homogenization unit is arranged in the sintering machine head electrostatic dust removal system, the guide vane and the porous distribution plate with an opening rate greater than 40% and uniformly provided with a plurality of through holes are arranged in sequence, so that the sintering flue gas entering the system can be airflow homogenized, the efficiency bottleneck problem of traditional dust removal technology can be improved, and the overall dust removal efficiency can be improved.

[0019] Optionally, the porous distribution plate comprises a first plate and a second plate, the second plate can be translated relative to the first plate along the direction of the plate surface of the first plate; the through hole comprises 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; the first hole is provided with a first ash removal piece, the first ash removal piece is slidingly connected to the hole wall of the first hole in the length direction of the first hole, and the first ash removal piece abuts against the first hole wall; the second hole is provided with a second ash removal piece, the second ash removal piece is slidingly connected to the hole wall of the second hole in the length direction of the second hole, and the second ash removal piece abuts against the second hole wall; the first ash removal piece is connected with a pull rope, the other end of the pull rope is connected to the second ash removal piece; the first hole wall is provided with a first reset piece, the first reset piece forces the first ash removal piece to be located at one end of the first hole away from the second plate, and the second hole wall is provided with a second reset piece, the second reset piece forces the second ash removal piece to be located at one end of the second hole away from the second plate.

[0020] By adopting the above technical scheme, the guide vanes and the porous distribution plate of the airflow homogenization unit are used to uniformly 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, when the outlet dust concentration > 20 mg / Nm³, the pulse mode of the high-frequency pulse unit is activated 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 the first ash removal piece and the second ash removal piece, which are connected by the pull rope, and cooperate with the first reset piece and the second reset piece to clean the hole walls of the first hole and the second hole, prevent the hole from being blocked, and ensure the airflow homogenization effect and stable operation of the system.

[0021] Optionally, the porous distribution plate comprises a first plate and a second plate, the first plate and the second plate are oppositely arranged, and the first plate can be close to or away from the second plate; the through hole comprises 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; the first hole and the second hole are arranged in a staggered manner; the surface of the first plate facing the second plate is provided with a first ash removal piece, and the first ash removal piece is arranged in extension along the length direction of the second hole; the surface of the second plate facing the first plate is provided with a second ash removal piece, and the second ash removal piece is arranged in extension along the length direction of the first hole; when the first plate is close to the second plate, the first ash removal piece gradually inserts into the second hole, and the second ash removal piece gradually inserts into the first hole.

[0022] By adopting the technical scheme, the airflow homogenizing unit can make the flue gas flow entering the electric field dust removal unit more uniform, the high-frequency pulse power supply unit can provide electric energy 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, the pulse mode of the high-frequency pulse unit is activated when the outlet dust concentration is greater than 20 mg / Nm³, and the porous distribution plate is relatively arranged by the first plate and the second plate, 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 ash cleaning piece, the second plate is provided with a second ash cleaning piece, when the first plate is close to the second plate, the ash cleaning piece is inserted into the opposite hole, the dust deposited on the porous distribution plate can be automatically cleaned, the airflow homogenization effect caused by dust accumulation can be avoided, and stable and efficient operation of the entire sintering machine head electrostatic dust removal system can be ensured.

[0023] In another aspect, the sintering machine head electrostatic dust removal method provided by the application adopts the following technical scheme:

[0024] A sintering machine head electrostatic dust removal method comprises the following steps:

[0025] S1: Before starting, check the insulation sub-chamber heating system (maintain 120 DEG C.);

[0026] S2: Start the dust remover after starting the induced draft fan, and perform no-load voltage rise test;

[0027] S3: Set the basic voltage of the electric field dust removal unit;

[0028] S4: When the dust concentration is greater than 20 mg / Nm³, the pulse mode is activated.

[0029] In summary, the application has at least one of the following beneficial technical effects:

[0030] 1. By connecting the high-frequency pulse power supply unit to the electric field dust removal unit, setting the dust concentration detector at the outlet of the electric field dust removal unit, and setting the intelligent control unit, the electric field dust removal unit and the high-frequency pulse power supply unit are both signal connected to the intelligent control device, when the dust concentration detector detects that the outlet dust concentration is greater than 20 mg / Nm³, the intelligent control unit activates the pulse mode of the high-frequency pulse power supply unit, enhances the dust removal capacity of the electric field, compared with the traditional dust removal technology, improves the dust removal efficiency and stability, and reduces the pollution to the environment;

[0031] 2. 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 to different basic voltages, which can improve the dust removal efficiency of the sintering flue gas, break through the efficiency bottleneck of traditional dust removal technology, and meet the increasingly strict environmental protection standards;

[0032] 3. The porous distribution plate comprises a first plate and a second plate, the first plate is movable relative to the second plate, and the first and second ash removal members remove ash from the first and second holes during movement, thereby prolonging the service life of the porous distribution plate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application.

[0034] Figure 2 is a schematic diagram of the state of signal connection in embodiment 1.

[0035] Figure 3 is a schematic diagram of the structure of the airflow homogenization unit in embodiment 1.

[0036] Figure 4 is a schematic diagram of the structure of the electric field dust removal unit in embodiment 1.

[0037] Figure 5 is a schematic diagram of the structure of embodiment 2 of the present application.

[0038] Figure 6 is a schematic diagram of the structure of embodiment 2 of the present application. Figure 5 is an enlarged schematic diagram of part A.

[0039] Figure 7 is a schematic diagram of the structure of embodiment 2 of the present application.

[0040] Figure 8 is a schematic diagram of the structure of embodiment 3 of the present application.

[0041] Figure 9 is a schematic diagram of the structure of embodiment 3 of the present application.

[0042] Reference signs: 1, airflow homogenization unit; 11, guide vane; 12, porous distribution plate; 13, first plate; 14, second plate; 15, through hole; 16, first hole; 161, first ash removal member; 162, first reset member; 17, second hole; 171, second ash removal member; 172, second reset member; 18, pull rope; 2, electric field dust removal unit; 21, anode plate; 22, cathode wire; 3, high-frequency pulse power supply unit; 4, intelligent control unit; 5, dust concentration detector. DETAILED DESCRIPTION

[0043] The following will be described in detail in combination with the accompanying Figures 1-9 The present application will be further described in detail.

[0044] The present application discloses a sintering machine head electrostatic dust removal system and method.

[0045] Embodiment 1

[0046] Reference Figures 1-4 The embodiment provides a sintering machine head electrostatic dust removal system, which comprises an airflow 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 airflow homogenizing unit 1 is arranged before the electric field dust removal unit 2 and performs 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 and provides 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 and is used for controlling the voltage of the electric field dust removal unit 2 and activating 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, sends the detected outlet dust concentration to the intelligent control unit 4, realizes intelligent regulation and control of the dust removal process and achieves the effects of efficiently reducing the dust content in sintering flue gas and meeting the environmental protection standard. Through the cooperative work of the units, the electric field intensity can be monitored and adjusted in real time, the dust removal effect is enhanced, and meanwhile the airflow homogenizing unit 1 can also make the airflow entering the electric field more uniform and improve the utilization rate of the electric field.

[0047] Specifically, the airflow homogenizing unit 1 comprises guide vanes 11 and a porous distribution plate 12 arranged in sequence, the porous distribution plate 12 is uniformly provided with a plurality of through holes 15, and the opening rate of the through holes 15 is greater than 40%. The guide vanes 11 are provided in plurality, the guide vanes 11 are arranged along the flow velocity direction of the airflow, and the plurality of guide vanes 11 are uniformly arranged along the direction perpendicular to the axis of the guide vanes 11. The guide vanes 11 are usually made of metal materials and have good corrosion resistance and mechanical strength, the shape of the guide vanes 11 can be a curved thin plate, the guide vanes 11 are installed near the air inlet of the system by welding or bolt connection and the like, are used for changing the direction of the airflow and making the airflow flow more uniformly to the porous distribution plate 12. Alternatively, the guide vanes 11 can also be made of plastic materials, which can reduce the weight while meeting certain strength requirements.

[0048] The porous distribution plate 12 is made of stainless steel plate and the through holes 15 are formed by numerical control machining and the like, so as to ensure the uniformity and precision of the holes. Alternatively, the porous distribution plate 12 can also be made of aluminum plate. The guide vanes 11 and the porous distribution plate 12 are fixed together by welding or flange connection and the like, the guide vanes 11 guide the airflow to the porous distribution plate 12 and make the airflow further uniform.

[0049] The electric field dust removal unit 2 is configured with three electric fields, comprising 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.

[0050] The electric field dust removal unit 2 further comprises an anode plate 21 and a cathode wire 22, the anode plate 21 comprises a plurality of 480C type corrugated plates, and the cathode wire 22 comprises a plurality of RSB thorn wires. The 480C type corrugated plate is made of carbon steel and is galvanized on the surface to enhance corrosion resistance, and the corrugated shape can increase the adsorption area of dust. The RSB thorn wire is usually made of stainless steel, and the thorn shape is sharp and can produce strong corona discharge. The spacing between adjacent 480C type corrugated plates is 400±10 mm, the spacing between adjacent RSB thorn wires is 200 mm, and the plurality of RSB thorn wires are arranged in a triangular arrangement. 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.

[0051] The output peak voltage of the high-frequency pulse power supply unit 3 is 80KV, and the duty cycle is 15%-30%. The high-frequency pulse power supply unit 3 mainly comprises a transformer, a rectifier and a pulse generator, etc. The transformer raises the input voltage, the rectifier converts alternating current into direct current, and the pulse generator generates a high-frequency pulse signal. It adopts modular design, which is convenient for 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 through a cable to provide appropriate pulse voltage for the electric field and enhance the dust removal effect.

[0052] The intelligent control unit 4 can be a PLC controller with a high-performance processor and rich input and output interfaces, which can receive data from the dust concentration detector 5 in real time and control the voltage of the electric field dust removal unit 2 and the pulse mode of the high-frequency pulse power supply unit 3 according to the preset program. The intelligent control unit 4 is connected to the electric field dust removal unit 2, the high-frequency pulse power supply unit 3 and the dust concentration detector 5 through data lines to realize data transmission and control instruction sending.

[0053] The dust concentration detector 5 usually adopts laser scattering principle or capacitance induction principle, which can quickly and accurately detect the outlet dust concentration. Its shell is made of stainless steel and has good protection performance, and is fixed at the outlet position of the electric field dust removal unit 2 through a mounting bracket.

[0054] The embodiment also provides a sintering machine head electrostatic dust removal method, which is applied to the sintering machine head electrostatic dust removal system and comprises the following steps.

[0055] S1: Before starting, check the insulator chamber heating system (maintain 120℃);

[0056] S2: Start the induced draft fan first, then start the dust remover, and test the no-load voltage rise;

[0057] S3: Set the first electric field basic voltage to 40kV, the second electric field to 50kV, and the third electric field to 60kV;

[0058] S4: activate pulse mode when dust concentration > 20mg / Nm³.

[0059] The implementation principle of embodiment 1 is that the sintering flue gas first passes through the airflow homogenization unit 1, the guide vane 11 and the porous distribution plate 12 make the airflow uniform, and then enters the electric field dust removal unit 2. The electric field dust removal unit 2 is powered by the high-frequency pulse power supply unit 3 to generate an electric field, 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 > 20mg / 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 cooperative work of each unit, the whole system efficiently reduces the dust content in the sintering flue gas, meets the requirements of environmental protection standards, improves the dust removal efficiency and stability compared with the traditional dust removal technology, and reduces the pollution to the environment.

[0060] Embodiment 2

[0061] With reference to 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 be translated relative to the first plate 13 along the direction of the plate surface of the first plate 13.

[0062] The first hole 16 is provided with a first ash removal piece 161, and the first ash removal piece 161 is connected to the hole wall of the first hole 16 in the length direction of the first hole 16, and the first ash removal piece 161 abuts against the wall of the first hole 16; the second hole 17 is provided with a second ash removal piece, and the second ash removal piece is connected to the hole wall of the second hole 17 in the length direction of the second hole 17, and the second ash removal piece 171 abuts against the wall of the second hole 17.

[0063] The first ash cleaning member 161 is connected with a pull rope 18, and the other end of the pull rope 18 is connected to a second ash cleaning member. The wall of the first hole 16 is provided with a first reset member 162, which forces the first ash cleaning member 161 to be located at the end of the first hole 16 away from the second plate 14; the wall of the second hole 17 is provided with a second reset member 172, which forces the second ash cleaning member 171 to be located at the end of the second hole 17 away from the second plate 14. The first ash cleaning member 161 and the second ash cleaning member 171 are generally made of rubber material, which has good elasticity and wear resistance, can tightly fit the hole wall, and effectively remove the attached dust. The pull rope 18 can be a steel wire rope or a nylon rope, which ensures a certain strength and flexibility. The first reset member 162 and the second reset member 172 can be springs, one end of which is fixed on the hole wall, and the other end is connected to the ash cleaning member. When the second plate 14 translates relative to the first plate 13, the pull rope 18 drives the first ash cleaning member 161 and the second ash cleaning member 171 to slide in the respective holes, removing the dust on the hole wall, and the spring ensures that the ash cleaning ring can return to the initial position after moving.

[0064] Embodiment 3

[0065] With reference to Figure 8 and Figure 9 , the difference between this embodiment and embodiment 1 is that the multi-hole distribution plate 12 includes a first plate 13 and a second plate 14, the first plate 13 is arranged opposite to the second plate 14, and the first plate 13 can approach or move away from the second plate 14. The hole 15 includes a first hole 16 and a second hole 17, the first hole 16 is arranged on the first plate 13, the second hole 17 is arranged on the second plate 14, and the first hole 16 and the second hole 17 are arranged staggered. The surface of the first plate 13 facing the second plate 14 is provided with a first ash cleaning member 161, which is arranged extending along the length direction of the second hole 17; the surface of the second plate 14 facing the first plate 13 is provided with a second ash cleaning member 171, which is arranged extending along the length direction of the first hole 16. When the first plate 13 approaches the second plate 14, the first ash cleaning member 161 gradually inserts into the second hole 17, and the second ash cleaning member 171 gradually inserts into the first hole 16. The first ash cleaning member 161 and the second ash cleaning member 171 can be a brush or a scraper, which is made of nylon or rubber material, and has good flexibility and wear resistance. The first plate 13 and the second plate 14 can realize relative movement through a driving device such as an electric push rod.

[0066] The implementation principle of the embodiment 3 is that when the sintering flue gas passes through the porous distribution plate 12, the dust will adhere to the hole wall. When the first plate 13 and the second plate 14 move relatively, the first dust removal part 161 and the second dust removal part 171 are respectively inserted into the holes of the other party, and the dust on the hole wall is removed. This dust removal method can more effectively prevent the hole from being blocked, ensure the airflow homogenization effect of the porous distribution plate 12, and further improve the dust removal efficiency and stability of the entire electrostatic dust removal system, meet the strict requirements of the environmental protection standard on the dust emission of the sintering flue gas, and be more flexible and efficient compared with the traditional dust removal method of the porous distribution plate 12, thereby reducing the workload of manual maintenance.

[0067] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A sintering machine head electrostatic dust removal system, characterized in that: The system includes 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 located 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). The intelligent control unit (4) is connected to the electric field dust removal unit (2) to control the voltage of the electric field dust removal unit (2). The dust concentration detector (5) is located at the outlet of the electric field dust removal unit (2) and is used to detect the concentration of flue gas at the outlet of the electric field dust removal unit (2). The outlet dust concentration at the port position is measured and the outlet dust concentration is sent to the intelligent control unit (4); the intelligent control unit (4) is connected to the high-frequency pulse power supply unit (3) and when the outlet dust concentration is >20mg / Nm³, the pulse mode of the high-frequency pulse power supply unit (3) is activated; the airflow homogenization unit (1) includes guide vanes (11) and a porous distribution plate (12) arranged in sequence, the porous distribution plate (12) is uniformly provided with a number of through holes (15), and the opening rate of the porous distribution plate (12) is greater than 40%; the porous distribution plate (12) includes a first plate (13) and a second plate (14), the second plate (13) and the second plate (14) are arranged in sequence. Plate (14) can be translated relative to the first plate (13) along the surface direction of the first plate (13); the through hole (15) includes a first hole (16) and a second hole (17), the first hole (16) is disposed in the first plate (13), and the second hole (17) is disposed in the second plate (14); a first cleaning component is disposed in the first hole (16), the first cleaning component slides along the length direction of the first hole (16) and is connected to the hole wall of the first hole (16), and the first cleaning component abuts against the wall of the first hole (16); a second cleaning component is disposed in the second hole (17), the second cleaning component slides along the second hole (17) The first cleaning component is slidably connected to the wall of the second hole (17) along its length direction, and the second cleaning component abuts against the wall of the second hole (17); the first cleaning component is connected to a pull rope (18), and the other end of the pull rope (18) is connected to the second cleaning component; the wall of the first hole (16) is provided with a first reset component (162), and the first reset component (162) forces the first cleaning component to be located at the end of the first hole (16) away from the second plate (14); the wall of the second hole (17) is provided with a second reset component (172), and the second reset component (172) forces the second cleaning component to be located at the end of the second hole (17) away from the second plate (14).

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 configured with three electric fields.

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) includes a first electric field, a second electric field and a third electric field; the base voltage of the first electric field is 40KV, the base voltage of the second electric field is 50KV and the base voltage of the third electric field is 60KV.

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

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

6. A method for electrostatic dust removal in a sintering machine head, applied to the electrostatic dust removal system for a sintering machine head as described in any one of claims 1-5, characterized in that: Includes the following steps: S1: Before starting, check the heating system of the insulator chamber and maintain it at 120℃; S2: First turn on the induced draft fan, then start the dust collector, and perform a no-load pressure test; S3: Set the base voltage of the electric field dust removal unit (2); S4: Pulse mode is activated when dust concentration > 20 mg / Nm³.

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