An electric furnace flue gas treatment device

Abstract

This invention relates to the technical field of flue gas treatment, specifically disclosing an electric furnace flue gas treatment device, including a treatment box, and an inlet pipe and an exhaust pipe disposed on the treatment box; an upper partition and a lower partition are arranged vertically and vertically within the treatment box, the upper and lower partitions forming an exhaust chamber, and the exhaust pipe is connected to the exhaust chamber; the lower end of the inlet pipe is inserted into the exhaust chamber, and a dust collection bag is fitted over the outside of the inlet pipe, with both the upper and lower ends of the dust collection bag located outside the exhaust chamber, and an opening at the lower end of the dust collection bag; the treatment box also includes a control device and a cleaning device; the control device cooperates with the upper and lower ends of the dust collection bag to drive it to move up and down, and simultaneously clamps the dust collection bag at the lower partition; the cleaning device is located below the lower partition; the electric furnace flue gas treatment device of this invention can ensure the filtration effect of the dust collection bag and improve the treatment efficiency of the flue gas.

Description

Technical Field

[0001] This invention relates to the technical field of flue gas treatment, and specifically to an electric furnace flue gas treatment device. Background Technology

[0002] Electric furnace flue gas is a high-temperature, dust-laden waste gas generated during the electric furnace smelting process. Its main components are metal oxide dust and acidic gases, characterized by fine dust particles, high concentration, and a wide range of flue gas temperature fluctuations. Currently, baghouse dust collectors are commonly used for the purification of this type of waste gas.

[0003] Chinese patent document CN110193251B discloses a baghouse dust collector for treating flue gas from waste incineration, comprising an air outlet, a dust collection chamber, a dust collection chamber, a support frame, a dust outlet, an air inlet, dust collection bags, and cooling pipes. The upper part of the support frame is fixedly connected to the dust collection chamber, the upper end of which is connected to the dust collection chamber. An air outlet is located at the top of the dust collection chamber, and an air inlet is located on the side wall of the dust collection chamber. Dust collection bags and cooling pipes are arranged sequentially from top to bottom within the dust collection chamber. An airflow detection device is installed inside the air outlet. This device consists of fan blades, a rotating shaft, an indicator, and a weight adjustment device. Several fan blades are evenly arranged circumferentially on the rotating shaft. The weight adjustment device is connected to one end of the rotating shaft, and the other end of the rotating shaft is connected to the indicator. The weight adjustment device includes a movable adjustment mechanism, which consists of a secondary bevel gear, a weight slider, a lead screw, and a guide rail. The secondary bevel gear and the primary bevel gear mesh orthogonally, and the secondary bevel gear is coaxially connected to the lead screw. The lead screw is rotatably mounted on the guide rail, which is fixed to the fan blade body. The weight slider is threaded onto the lead screw. By installing a fan blade with a weight slider, a gear rack, and a contact sensor structure at the air outlet of the dust collector, the fan blade is rotated by the airflow. The start / stop status of the fan blade determines whether the dust bag is blocked. The position of the weight slider can be adjusted to adapt to different operating conditions, and an alarm is triggered when blockage occurs to remind maintenance.

[0004] However, this solution also has the following problems: when the dust collector filter bags become clogged, offline cleaning is usually required. Although existing online dust removal technology can handle dust during operation, the continuous flow of the cleaning air through the filter bags can easily lead to the re-adhesion of already detached dust, resulting in incomplete cleaning. At the same time, there are problems such as uneven cleaning, increased instantaneous emission concentration, and accelerated filter bag wear. Moreover, it cannot effectively deal with severe clogging conditions such as bag sticking and caking. It is only suitable for light dust accumulation conditions and has poor treatment effect on moderate and severe filter bag clogging, which still requires shutdown for offline cleaning, affecting the efficiency of flue gas treatment. Summary of the Invention

[0005] This invention provides an electric furnace flue gas treatment device, which aims to solve the problem in related technologies where the dust collector bag needs to be shut down and cleaned offline when it is severely clogged, thus affecting the flue gas treatment efficiency.

[0006] The electric furnace flue gas treatment equipment of the present invention includes a treatment box, and an inlet pipe and an exhaust pipe disposed on the treatment box. An upper partition and a lower partition are arranged vertically and horizontally within the treatment box, forming an exhaust chamber. The exhaust pipe is connected to the exhaust chamber. The lower end of the inlet pipe is inserted into the exhaust chamber, and a dust collection bag is fitted over the outside of the inlet pipe. Both ends of the dust collection bag are located outside the exhaust chamber, and the lower end of the dust collection bag has an opening. The treatment box also includes a control device and a cleaning device. The control device cooperates with the upper and lower ends of the dust collection bag to move it up and down. Simultaneously, the dust collection bag is clamped at the lower partition; the processing box is equipped with a collection box, and the cleaning device includes: a cleaning motor, a striking rod, a high-pressure air nozzle, and a high-pressure water nozzle. The output end of the cleaning motor is connected to the striking rod, which strikes the dust collection bag when it rotates. The high-pressure air nozzle and the high-pressure water nozzle are both installed on the side wall of the collection box; during the up and down movement of the dust collection bag, the part located in the exhaust chamber forms a filter section for filtering the flue gas; the part located below the lower partition forms a section to be cleaned, and the cleaning device is used to clean this section.

[0007] Its effectiveness lies in enabling in-line deep cleaning of the dust collector bag during the filtration of flue gas by incorporating control and cleaning devices. Specifically, when the dust collector bag is filtering flue gas, the control device moves the bag up and down and clamps and positions the lower part of the bag. During this movement, the portion of the bag inside the exhaust chamber continuously participates in flue gas filtration, while the portion below the lower partition becomes the cleaning area, which is then continuously and deeply cleaned by the cleaning device. As the dust collector bag moves, the filtration area and the cleaning area alternate continuously, ensuring that the filtration area continues to perform its filtering function while achieving in-line deep cleaning of the dust collector bag. This stabilizes the filtration effect of the dust collector bag and improves flue gas treatment efficiency.

[0008] Preferably, the control device includes an upper drive member and a lower drive member. The upper drive member cooperates with the upper end of the dust collection bag, and the lower drive member cooperates with the lower end of the dust collection bag. The upper drive member and the lower drive member can synchronously drive the upper and lower ends of the dust collection bag to move in the same direction.

[0009] Its effect is that the upper and lower drive components work together to drive the upper and lower ends of the dust bag to move synchronously, thereby realizing the up-and-down reciprocating movement of the dust bag.

[0010] Preferably, the upper drive component includes: an upper drive motor, a screw, and a drive ring. The drive ring is slidably sleeved on the outside of the air inlet pipe. The upper end of the dust collector bag is connected to the drive ring. A fixed ring is fixedly sleeved on the outside of the air inlet pipe. The screw is rotatably engaged with the fixed ring and threadedly engaged with the drive ring. The upper drive motor is installed inside the processing box, and its output end is connected to the screw.

[0011] Its effect is that the upper drive motor drives the upper end of the dust collector bag to move up and down through the screw and drive ring, thereby adjusting the position of the upper end of the dust collector bag.

[0012] Preferably, the lower drive component is located below the lower partition; the lower drive component includes a mounting plate, a rotating roller and a lower drive motor; the mounting plate, the rotating roller and the lower drive motor are symmetrically arranged in two sets around the center line of the air inlet pipe, the rotating roller is rotatably mounted on the mounting plate, the output end of the lower drive motor is connected to the rotating roller for transmission, and the two sets of rotating rollers are parallel to each other and clamped on the outside of the dust collection bag.

[0013] Its effect is that the lower drive motor drives the lower end of the dust collector bag to move through the rotating roller, so as to achieve synchronous displacement of the upper and lower ends of the dust collector bag.

[0014] Preferably, the collection box is provided with a waste discharge pipe extending to the outside.

[0015] Its effect is that by installing a drain pipe on the collection box, the impurities collected in the collection box can be discharged for cleaning.

[0016] Preferably, the striking rod includes: a connecting part, a middle part, and a striking part. The striking part is parallel to the connecting part, the middle part is disposed between the striking part and the connecting part and connects the two, and the connecting part is arranged in a horizontal direction and corresponds to the edge of the dust bag.

[0017] Preferably, both mounting plates are slidably assembled inside the processing box, and their sliding directions are opposite. The processing box is equipped with two cylinders corresponding to the two mounting plates, and the output end of the cylinders is connected to the mounting plates to drive the mounting plates to move.

[0018] Preferably, the upper partition plate is provided with an upper through hole, the fixing ring is located in the upper through hole and is arranged coaxially with the upper through hole, the outer diameter of the fixing ring is smaller than the inner diameter of the upper through hole, the inner side of the dust bag abuts against the fixing ring, the outer side abuts against the inner wall of the upper through hole, and the upper drive component is located above the fixing ring.

[0019] Preferably, the lower partition plate is provided with a lower through hole, through which the lower end of the dust bag passes and cooperates with the rotating roller. When the rotating roller clamps the dust bag, the two rotating rollers and the two mounting plates block the lower through hole.

[0020] Preferably, a slider is slidably mounted inside the mounting plate, the rotating shaft of the roller is rotatably engaged with the slider, the sliding direction of the slider is the same as the sliding direction of the mounting plate, and an elastic element is provided inside the mounting plate, which is connected to the slider to push the roller to abut against the dust collection bag.

[0021] Beneficial effects:

[0022] This invention uses a rotating roller to clamp the lower part of the dust collector bag, creating a closed state for the portion of the dust collector bag located in the exhaust chamber, allowing for normal flue gas filtration. The portion of the dust collector bag located below the rotating roller is open, facilitating deep cleaning of this part by a cleaning device. Furthermore, the cleaned impurities can be discharged through the opening at the lower end of the dust collector bag, thereby achieving online deep cleaning of the dust collector bag, effectively ensuring the filtration effect of the dust collector bag, and improving the flue gas treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the intake pipe in this invention.

[0025] Figure 3 This is a schematic diagram of the upper driving component in this invention.

[0026] Figure 4 This is a schematic diagram of the structure of the dust collection bag in this invention.

[0027] Figure 5 This is a schematic diagram of the structure of the rotating roller in this invention.

[0028] Figure 6 yes Figure 5 A schematic diagram of the structure at point A in the middle.

[0029] Figure 7 This is a schematic diagram of the cleaning device in this invention.

[0030] Figure label:

[0031] 1. Processing box; 11. Exhaust chamber; 2. Inlet pipe; 21. Fixing ring; 3. Exhaust pipe; 4. Upper partition; 41. Upper through hole; 5. Lower partition; 51. Lower through hole; 6. Dust bag; 61. Opening; 7. Control device; 71. Upper drive component; 711. Upper drive motor; 712. Screw; 713. Drive ring; 72. Lower drive component; 721. Mounting plate; 722. Rotary roller; 723. Lower drive motor; 8. Cleaning device; 81. Cleaning motor; 82. Striking rod; 821. Connecting part; 822. Middle part; 823. Striking part; 83. High-pressure air nozzle; 84. High-pressure water nozzle; 9. Collection box; 91. Waste discharge pipe; 92. Slider; 93. Elastic component; 94. Cylinder. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figures 1 to 7As shown, the electric furnace flue gas treatment equipment of the present invention includes a treatment box 1, on which an inlet pipe 2, an exhaust pipe 3, a control device 7, a cleaning device 8, a dust collection bag 6, a collection box 9, and a waste discharge pipe 91 are provided. The inlet pipe 2 is installed at the upper end of the treatment box 1, and the exhaust pipe 3 is arranged on the side of the treatment box 1. One end of the inlet pipe 2 is outside the treatment box 1 for receiving electric furnace flue gas, and the other end extends into the interior of the dust collection bag 6, allowing the flue gas to directly enter the dust collection bag 6 for filtration and purification. The control device 7 and the cleaning device 8 work together to clean the dust collection bag 6 in real time to remove dust and impurities attached to the dust collection bag 6, ensuring filtration effect and smooth ventilation. The collection box 9 is located at the bottom of the treatment box 1 to receive and collect dust and impurities falling from the dust collection bag 6. One end of the waste discharge pipe 91 is connected to the interior of the collection box 9, and the other end extends to the outside of the treatment box 1 to discharge the collected impurities, achieving continuous and stable electric furnace flue gas dust removal and impurity cleaning operations.

[0034] During operation, high-temperature flue gas is sent into the dust collection bag 6 through the inlet pipe 2. Dust and impurities in the flue gas are intercepted and blocked by the dust collection bag 6. The purified gas passes through the dust collection bag 6 and is discharged from the exhaust pipe 3. During this process, the control device 7 and the cleaning device 8 work together to continuously clean the dust collection bag 6 online, shaking off or scraping off the impurities attached to the dust collection bag 6. The detached impurities fall into the collection box 9 below under the action of gravity and are stored in a concentrated manner. Subsequently, the collected impurities can be discharged to the outside of the equipment through the discharge pipe 91, thereby continuously maintaining the permeability and filtration performance of the dust collection bag 6, effectively avoiding bag blockage, and ensuring the continuous and stable treatment efficiency and purification effect of the electric furnace flue gas.

[0035] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 Inside the treatment box 1, there are upper partitions 4 and lower partitions 5 arranged vertically along the height direction. Both partitions are horizontally set and sealed to the inner wall of the treatment box 1. The upper partitions 4 and lower partitions 5 together form a relatively closed exhaust chamber 11. The exhaust pipe 3 is connected to the exhaust chamber 11 and is used to discharge the filtered flue gas to the outside.

[0036] The intake pipe 2 extends into the interior of the treatment chamber 1 from the top or upper part, with its lower end extending downwards and inserting into the exhaust chamber 11, allowing the flue gas to be treated to be directly delivered into the exhaust chamber 11 area through the intake pipe 2. A dust bag 6 is fitted over the intake pipe 2. The dust bag 6 has a vertically arranged cylindrical structure, its length being greater than the distance between the upper partition 4 and the lower partition 5. Both the upper and lower ends of the dust bag 6 extend outside the exhaust chamber 11, with the lower end having an open opening 61. The control device 7 is connected to the upper and lower ends of the dust bag 6 respectively, driving the dust bag 6 to reciprocate vertically while simultaneously clamping it at the lower partition 5. A cleaning device 8 is located below the lower partition 5 and is used to clean the dust adhering to the outer wall of the dust bag 6.

[0037] During normal flue gas treatment, the control device 7 continuously drives the dust collector bag 6 to move slowly up and down, so that it passes through the exhaust chamber 11 area in sections: the part of the dust collector bag 6 that passes through the upper partition 4 and the lower partition 5 forms a filter section in the exhaust chamber 11. After the flue gas sent in by the inlet pipe 2 enters the exhaust chamber 11, it passes through the filter section of the dust collector bag 6 and diffuses outward. The dust is trapped inside the dust collector bag 6, and the filtered clean flue gas is discharged through the exhaust pipe 3. The part of the dust collector bag 6 that moves to the lower partition 5 forms a cleaning section. After this part leaves the filtration working area, the cleaning device 8 blows or shakes the dust deposited on its surface to clean it, realizing online dust removal of the dust collector bag 6.

[0038] By continuously moving the dust collection bag 6 up and down and alternately forming the filtration section and the section to be cleaned, the device can simultaneously clean the filter bag while treating flue gas without interruption. This ensures continuous filtration effect and avoids dust accumulation that leads to increased resistance, thus achieving efficient, continuous and stable flue gas dust removal.

[0039] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The control device 7 includes an upper drive component 71 and a lower drive component 72. The upper drive component 71 is arranged at the upper end of the dust bag 6 and forms a mating structure with the upper end of the dust bag 6. The lower drive component 72 is arranged at the lower end of the dust bag 6 and forms a mating structure with the lower end of the dust bag 6. The upper drive component 71 and the lower drive component 72 adopt a synchronous drive control mode. The two can work together to drive the upper end and the lower end of the dust bag 6 to move synchronously on the same side in the vertical direction, so that the dust bag 6 as a whole can move smoothly according to a preset trajectory, thereby achieving precise control of the position of the dust bag 6.

[0040] Reference Figure 2 , Figure 3 , Figure 4The upper drive component 71 includes an upper drive motor 711, a screw 712, and a drive ring 713. The drive ring 713 is mounted on the outside of the air inlet pipe 2 in a sliding manner. The upper end of the dust bag 6 is fixedly connected to the drive ring 713, and the upper end of the dust bag 6 is in a closed state. The upper end of the dust bag 6 can move synchronously with the drive ring 713. A fixing ring 21 is fixedly mounted on the outer wall of the air inlet pipe 2. The fixing ring 21 serves as a rotational support structure for the screw 712. The screw 712 and the fixing ring 21 form a rotational fit. At the same time, the screw 712 and the drive ring 713 form a threaded transmission fit. The upper drive motor 711 is fixedly installed inside the processing box 1, and its output shaft end is fixedly connected to the upper end of the screw 712 to provide rotational power for the screw 712.

[0041] During operation, the upper drive motor 711 is energized and outputs torque, driving the screw 712 to rotate circumferentially with the fixed ring 21 as support. Under the action of threaded transmission, the rotational motion of the screw 712 is converted into the linear motion of the drive ring 713, causing the drive ring 713 to slide vertically along the outer wall of the air inlet pipe 2. Since the upper end of the dust bag 6 is connected to the drive ring 713, the drive ring 713 will synchronously pull the upper end of the dust bag 6 to rise and fall synchronously during the vertical movement, thereby realizing the adjustment of the position of the upper end of the dust bag 6.

[0042] Reference Figure 2 , Figure 4 , Figure 5 , Figure 6 The lower drive component 72 is positioned below the lower partition 5 and works in conjunction with the upper drive component 71 to synchronously drive the dust bag 6. The lower drive component 72 includes a mounting plate 721, a rotating roller 722, and a lower drive motor 723. The mounting plate 721, rotating roller 722, and lower drive motor 723 are arranged symmetrically in two sets with the center line of the air inlet pipe 2 as the axis of symmetry. The rotating roller 722 is rotatably mounted on the corresponding mounting plate 721. The output end of the lower drive motor 723 is connected to the rotating roller 722, driving the rotating roller 722 to rotate around its own axis. The two sets of rotating rollers 722 are arranged parallel to each other and clamp the dust bag 6 from the outside, ensuring the dust bag 6 is stably clamped between the two sets of rotating rollers 722.

[0043] As the upper drive motor 711 starts and drives the upper end of the dust bag 6 to move vertically, the lower drive motor 723 starts simultaneously and drives the rotating roller 722 to rotate. When the roller 722 rotates, it pulls the lower end of the dust bag 6 along with the outer side of the dust bag 6, causing it to move synchronously in the same direction as the upper end. Through the coordinated action of the upper drive component 71 and the lower drive component 72, the dust bag 6 as a whole can achieve stable reciprocating movement in the vertical direction. Simultaneously, during the movement, the section of the dust bag 6 located inside the exhaust chamber 11 remains taut, preventing loosening or wrinkling from affecting the gas-solid separation effect, thus ensuring that the dust bag 6 maintains stable and reliable filtration performance during dynamic movement.

[0044] The rotating rollers 722 are positioned below the lower partition 5. When the two sets of rotating rollers 722 clamp the dust collector bag 6, they can seal and constrain the filtration section of the dust collector bag 6 located inside the exhaust chamber 11, keeping this section of the dust collector bag 6 in a sealed filtration state. This ensures that the flue gas can undergo normal gas-solid separation when passing through the dust collector bag 6, preventing the flue gas from leaking directly without effective filtration. Simultaneously, because the lower end of the dust collector bag 6 has an opening 61, and the clamping point of the rotating rollers 722 is located above this lower opening 61, the section of the dust collector bag 6 below the rotating rollers 722 remains open, providing space and conditions for the cleaning device 8 to clean the dust and impurities adhering to the outer or inner wall of this section of the dust collector bag 6.

[0045] During the cleaning process, the stripped dust and impurities can be smoothly discharged directly through the opening 61 at the bottom of the dust collector bag 6, without accumulating inside the bag. By continuously adjusting the conveying position of the dust collector bag 6, the uncleaned sections on the dust collector bag 6 can be gradually moved to the cleaning area below the rotating roller 722, enabling the dust collector bag 6 to achieve uninterrupted online continuous dust cleaning. Since the bottom of the dust collector bag 6 always remains open at 61, the dust and impurities accumulated inside the bag can be completely discharged, effectively preventing dust from clogging inside the dust collector bag 6 or in the filter material pores, maintaining the good air permeability and filtration efficiency of the dust collector bag 6, thereby ensuring the stable, efficient, and continuous operation of the flue gas treatment system.

[0046] Reference Figure 1 , Figure 2An upper through hole 41 is provided on the upper partition 4, and the upper through hole 41 is set through the upper partition 4. The fixing ring 21 is coaxially arranged inside the upper through hole 41. The outer diameter of the fixing ring 21 is smaller than the inner diameter of the upper through hole 41. That is, the outer side of the fixing ring 21 is spaced apart from the inner wall of the upper through hole 41, thereby forming an annular gap between the outer wall of the fixing ring 21 and the inner wall of the upper through hole 41, which allows the upper end of the dust collector bag 6 to pass through and be clamped. The upper end of the dust collector bag 6 is inserted into the annular gap from bottom to top. Its inner sidewall abuts against the outer peripheral surface of the fixing ring 21, and its outer sidewall abuts against the inner wall surface of the upper through hole 41. Relying on the bidirectional squeezing action of the fixing ring 21 and the inner wall of the upper through hole 41, the upper part of the dust collector bag 6 is sealed and blocked, effectively preventing dust-laden flue gas from entering the area above the fixing ring 21 from the gap between the dust collector bag 6 and the upper partition 4, ensuring the airtightness of gas-solid separation. Alternatively, an elastic sealing ring can be installed on the inner wall of the upper through hole 41. The elastic sealing ring abuts against the dust collection bag 6 to ensure sealing and prevent flue gas from entering the area corresponding to the upper part of the fixed ring 21 inside the dust collection bag 6.

[0047] During the reciprocating motion of the dust collector bag 6, its upper part remains above the upper partition 4 and does not enter the area below the upper partition 4 as the main body of the dust collector bag 6 moves downward. This ensures that the upper part of the dust collector bag 6 is always confined above the upper partition 4 and cannot move to the area below the lower roller 722. Since the effective filtration section of the dust collector bag 6 is always below the fixing ring 21, when the dust collector bag 6 moves upward, the lower edge of the fixing ring 21 will slide relative to the inner wall of the dust collector bag 6, thereby scraping off the dust and impurities adhering to the inner wall of the dust collector bag 6. At the same time, for the part of the bag that is always confined above the upper partition 4 and cannot move to the area below the roller 722 for tapping and cleaning, the fixing ring 21 can also scrape and clean its inner wall, preventing dust accumulation in this area due to its inability to participate in tapping and cleaning. This ensures the overall cleaning effect of the dust collector bag 6 and maintains stable filtration performance.

[0048] Reference Figure 2 , Figure 4 Both mounting plates 721 are assembled in the internal cavity of the processing box 1 in a sliding fit. The sliding directions of the two mounting plates 721 are opposite and they are arranged opposite to each other. Each mounting plate 721 is independently equipped with a cylinder 94 inside the processing box 1. The cylinder bodies of the two cylinders 94 are fixedly installed on the inner wall of the processing box 1. The piston rod output end of the cylinder 94 is fixedly connected to the corresponding mounting plate 721. The extension and retraction of the cylinder 94 can drive the two mounting plates 721 to move linearly back and forth in the same guide direction.

[0049] In the initial standby state, both cylinders 94 are retracted, causing the two rollers 722 mounted on the two mounting plates 721 to move away from each other. The distance between them is greater than the outer diameter of the dust bag 6 to be processed, thus reserving sufficient space for the loading and placement of the dust bag 6, making it convenient for operators or the loading mechanism to place the dust bag 6 stably in the area between the two rollers 722. When the dust bag 6 is placed and needs to be clamped and positioned, the two cylinders 94 start synchronously and move towards each other, pushing the corresponding mounting plates 721 to move synchronously along the sliding direction. The mounting plates 721 then drive the rollers 722 on them to move synchronously towards the dust bag 6 in the middle. As the cylinders 94 continue to output power, the two rollers 722 gradually approach the outer wall of the dust bag 6 and form a clamping force, finally clamping the dust bag 6 stably between the two rollers 722.

[0050] Reference Figure 1 , Figure 2 The lower partition 5 has a lower through hole 51 corresponding to the position of the dust bag 6. The diameter of the lower through hole 51 is slightly larger than the outer diameter of the dust bag 6. The lower end of the dust bag 6 passes vertically downward through the lower through hole 51 and cooperates with the rotating roller 722 below. By providing the lower through hole 51 on the lower partition 5, a channel for the dust bag 6 to extend downward is provided.

[0051] Mounting plate 721 and lower partition plate 5 are assembled in a sliding fit and are arranged as a whole below lower partition plate 5. When the drive mechanism drives mounting plate 721 to slide laterally along the bottom surface of lower partition plate 5, so that the two rotating rollers 722 on both sides come together and clamp and fix dust bag 6, the two symmetrically arranged mounting plates 721 together enclose and block the lower through hole 51 on lower partition plate 5. The combined structure of rotating roller 722 and mounting plate 721 can closely fit the periphery of lower through hole 51, thereby completely sealing lower through hole 51, blocking the downward flow path of filtered flue gas, achieving effective sealing of exhaust chamber 11, preventing filtered flue gas from leaking directly from lower through hole 51, ensuring that flue gas is discharged through exhaust pipe 3, and improving the sealing performance of dust removal system.

[0052] Reference Figure 5 , Figure 6 The mounting plate 721 has a guide groove inside along its sliding direction. A slider 92 is slidably mounted in the groove, and the slider 92 can reciprocate linearly along the sliding direction of the mounting plate 721. A rotating shaft is provided at both ends of the roller 722. This rotating shaft and the slider 92 are rotated together through bearings or shaft holes, allowing the roller 722 to rotate freely relative to the slider 92. The sliding direction of the slider 92 is consistent with the overall sliding direction of the mounting plate 721, ensuring that the radial pressing action of the roller 722 is compatible with and does not interfere with the overall movement trajectory as it moves with the mounting plate 721.

[0053] Reference Figure 5 , Figure 6 An elastic element 93 is provided inside the mounting plate 721 at the position corresponding to the slider 92. The elastic element 93 is a spring. One end of the elastic element 93 abuts against the inner wall of the mounting plate 721, and the other end is fixedly connected to or abuts against the slider 92, thereby continuously applying an elastic thrust along the slide groove direction to the slider 92, so that the slider 92 drives the rotating roller 722 to always remain in contact with the outer wall of the dust collection bag 6.

[0054] When the roller 722 is in contact with the dust bag 6 and is working normally, the elastic element 93 is in a compressed state, relying on the pre-tightening elastic force to provide a stable clamping force for the roller 722. As the dust bag 6 moves up and down through the roller 722, there will be impurities inside it, which may cause thickness fluctuations, local bulges or sudden increases in force on the surface of the dust bag 6. The slider 92 can adaptively retract along the groove under the action of the elastic element 93. The compression deformation of the elastic element 93 buffers and adjusts the clamping pressure of the roller 722 on the dust bag 6, avoiding squeezing, pulling or breaking of the dust bag 6 due to excessive clamping force. At the same time, it can also ensure that the roller 722 and the dust bag 6 always maintain effective contact, improving the stability and reliability of dust removal and cleaning.

[0055] Reference Figure 1 , Figure 7 The cleaning device 8 includes a cleaning motor 81, a striking rod 82, a high-pressure air nozzle 83, and a high-pressure water nozzle 84. The output end of the cleaning motor 81 is fixedly connected to the striking rod 82 to provide power for the striking action. The high-pressure air nozzle 83 and the high-pressure water nozzle 84 are both fixedly installed on the side wall of the collection box 9. They are respectively connected to the external air source and the external water source to form an independent medium conveying channel. Multiple high-pressure air nozzles 83 and high-pressure water nozzles 84 are provided on the side wall of the collection box 9.

[0056] During operation, the cleaning motor 81 is powered on and outputs rotational power, driving the connected striking rod 82 to rotate continuously. The rotating striking rod 82 cyclically strikes the outer wall of the dust collection bag 6 along a preset trajectory. Through the vibration generated by the mechanical striking, the dust, particulate matter and other impurities attached to and accumulated on the pores and inner wall of the dust collection bag 6 are loosened and fall off, and discharged from the dust collection bag 6 under the action of gravity and airflow, completing the preliminary dust removal operation. At the same time, the high-pressure air nozzle 83 and the high-pressure water nozzle 84 work in tandem. The high-pressure air nozzle 83 sprays compressed air from an external air source into a high-speed airflow onto the surface of the dust collection bag 6, using the scouring force of the airflow to further blow away residual impurities. The high-pressure water nozzle 84 pressurizes water from an external water source to form a high-pressure water flow, spraying and rinsing the dust collection bag 6. The two work together to achieve a deep cleaning that combines air washing and water washing on top of mechanical knocking. This effectively removes fine impurities that are difficult to remove by knocking from the micropores of the dust collection bag 6, improves the overall cleaning effect and permeability of the dust collection bag 6, and ensures the normal and stable operation of subsequent dust removal operations.

[0057] In this embodiment, the high-pressure air nozzle 83 and the high-pressure water nozzle 84 adopt an alternating collaborative working mode. They do not start simultaneously, but operate in stages and under different conditions according to the cleaning needs of the dust bag 6. Under normal dust removal conditions, the high-pressure air nozzle 83 maintains continuous airflow, using high-speed airflow to blow away and peel off the conventional dust adhering to the surface and filter pores of the dust bag 6, achieving routine cleaning of the dust bag 6 and maintaining its normal filtration performance. When the dust bag 6 becomes clogged with stubborn dust after long-term use, requiring deep cleaning, the high-pressure air nozzle 83 immediately stops airflow. After the airflow blowing action completely stops, the high-pressure water nozzle 84 is activated, spraying a high-pressure water stream to thoroughly and intensely wash the dust bag 6, completely removing the tightly adhered dust and dirt, completing the deep cleaning operation of the dust bag 6. After deep cleaning, the high-pressure water nozzle 84 stops working, and the high-pressure air nozzle 83 resumes continuous airflow mode, cycling in sequence to achieve an orderly switch between routine treatment and deep cleaning.

[0058] Reference Figure 7 The striking rod 82 includes a connecting part 821, a middle part 822, and a striking part 823. The striking part 823 and the connecting part 821 are arranged parallel to each other. The middle part 822 is vertically connected between the striking part 823 and the connecting part 821, forming a stable bent rod structure. The connecting part 821 extends horizontally, and its installation position corresponds to the edge of the bag opening or the upper edge of the bag body of the dust collector bag 6, ensuring that the subsequent transmission force can be transmitted to the bag body.

[0059] During operation, the connecting part 821 rotates around its axis. The connecting part 821, through the intermediate part 822, drives the striking part 823 at the end to oscillate synchronously. During continuous rotation, the striking part 823 periodically and intermittently contacts and strikes the wall of the dust collector bag 6. Through repeated mechanical striking, dust and particulate matter adhering to the inner or outer wall of the dust collector bag 6 are shaken off. Additionally, water is filled at the bottom of the collection box 9, allowing the cleaned impurities to settle and dissolve in the water. This also facilitates the subsequent unified discharge of wastewater containing impurities through the discharge pipe 91, achieving centralized cleaning of impurities.

[0060] The implementation principle of this invention is as follows: A rotating roller 722 is arranged below the lower partition 5 to clamp and position the lower end of the dust collection bag 6. Under the coordinated action of the upper drive motor 711 and the lower drive motor 723, the dust collection bag 6 can be driven to move up and down reciprocally in the vertical direction. During the movement of the dust collection bag 6, the striking rod 82, the high-pressure air nozzle 83, and the high-pressure water nozzle 84 work in sync: the striking rod 82 periodically strikes the outer wall of the dust collection bag 6, causing the dust adhering to the inner wall of the bag to loosen and fall off; the high-pressure air nozzle 83 sprays high-pressure airflow onto the surface of the dust collection bag 6 to powerfully blow away the loosened dust; and the high-pressure water nozzle 84 sprays high-pressure water according to the working conditions to wash away stubborn dust and sticky dirt. The three work together to achieve efficient dust removal.

[0061] The aforementioned cleaning actions are all performed on the section of dust collector bag 6 below the rotating roller 722, continuously as the dust collector bag 6 moves up and down, thus achieving online cleaning of the dust collector bag 6 while the equipment is running normally and the flue gas treatment process is not interrupted. Simultaneously, the opening 61 at the lower end of the dust collector bag 6 remains below the rotating roller 722, allowing impurities to be discharged through the opening 61, significantly improving the overall cleanliness and permeability of the dust collector bag 6. After deep cleaning, the dust collector bag 6 can quickly restore its high-efficiency filtration performance, effectively maintaining the stable operation of the flue gas treatment system and improving the overall flue gas purification efficiency.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric furnace flue gas treatment device, comprising a treatment box, and an inlet pipe and an exhaust pipe disposed on the treatment box, characterized in that, The treatment box is equipped with upper and lower partitions arranged at intervals, forming an exhaust chamber. An exhaust pipe is connected to the exhaust chamber. The lower end of the inlet pipe is inserted into the exhaust chamber, and a dust collection bag is fitted over the inlet pipe. Both ends of the dust collection bag are located outside the exhaust chamber, with an opening at the lower end. The treatment box also includes a control device and a cleaning device. The control device works with the upper and lower ends of the dust collection bag to move it up and down, while simultaneously clamping the dust collection bag at the lower partition. A collection box is located within the treatment box. The cleaning device includes a cleaning motor, a striking rod, a high-pressure air nozzle, and a high-pressure water nozzle. The output end of the cleaning motor is connected to the striking rod, which strikes the dust collection bag as it rotates. The high-pressure air nozzle and high-pressure water nozzle are both installed on the side wall of the collection box. During the up-and-down movement of the dust collection bag, the portion within the exhaust chamber forms a filter section for filtering the flue gas; the portion below the lower partition forms a section to be cleaned, which the cleaning device cleans. The control device includes an upper drive component and a lower drive component. The upper drive component cooperates with the upper end of the dust collection bag, and the lower drive component cooperates with the lower end of the dust collection bag. The upper drive component and the lower drive component synchronously drive the upper and lower ends of the dust collection bag to move in the same direction. The upper drive unit includes: an upper drive motor, a screw and a drive ring. The drive ring is slidably sleeved on the outside of the air inlet pipe. The upper end of the dust bag is connected to the drive ring. A fixed ring is fixedly sleeved on the outside of the air inlet pipe. The screw is rotatably engaged with the fixed ring and threadedly engaged with the drive ring. The upper drive motor is installed in the processing box and its output end is connected to the screw. The lower drive unit is located below the lower partition plate; the lower drive unit includes a mounting plate, a rotating roller, and a lower drive motor; the mounting plate, rotating roller, and lower drive motor are symmetrically arranged in two sets around the center line of the air inlet pipe; the rotating roller is rotatably mounted on the mounting plate; the output end of the lower drive motor is connected to the rotating roller; the two sets of rotating rollers are parallel to each other and clamped on the outside of the dust collection bag. Both mounting plates are slidably assembled inside the processing box, and their sliding directions are opposite. The processing box is equipped with two cylinders corresponding to the two mounting plates, and the output end of the cylinders is connected to the mounting plate to drive the mounting plate to move. The lower partition plate has a lower through hole. The lower end of the dust bag passes through the lower through hole and cooperates with the rotating roller. When the rotating roller clamps the dust bag, the two rotating rollers and the two mounting plates block the lower through hole.

2. The electric furnace flue gas treatment equipment according to claim 1, characterized in that, The collection box is equipped with a waste discharge pipe that extends to the outside.

3. The electric furnace flue gas treatment equipment according to claim 2, characterized in that, The striking rod includes a connecting part, a middle part, and a striking part. The striking part is parallel to the connecting part. The middle part is located between the striking part and the connecting part and connects the two. The connecting part is set in a horizontal direction and corresponds to the edge of the dust bag.

4. The electric furnace flue gas treatment equipment according to claim 1, characterized in that, The upper partition plate has an upper through hole, the fixing ring is located inside the upper through hole and is arranged coaxially with the upper through hole. The outer diameter of the fixing ring is smaller than the inner diameter of the upper through hole. The inner side of the dust bag abuts against the fixing ring, and the outer side abuts against the inner wall of the upper through hole. The upper drive component is located above the fixing ring.

5. The electric furnace flue gas treatment equipment according to claim 1, characterized in that, The mounting plate has a sliding block inside, and the rotating shaft of the roller is in rotatable cooperation with the slider. The sliding direction of the slider is the same as the sliding direction of the mounting plate. The mounting plate is equipped with an elastic element, which is connected to the slider to push the roller to abut against the dust collection bag.

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