Steel smelting waste gas treatment equipment and treatment method

Abstract

The invention relates to the field of steel smelting waste gas treatment equipment, in particular to steel smelting waste gas treatment equipment and a treatment method. According to the steel smelting waste gas treatment equipment and method, in the steel smelting process, the surfaces of the two sides of the metal screen mesh for screening waste gas can be conveniently and selectively polished and cleaned; the situation that thick impurities are attached to the surface of a metal screen for screening waste gas for a long time and cannot be cleaned in the later period is prevented. According to the technical scheme, the steel smelting waste gas treatment equipment comprises a fixing ring and a waste gas outflow cylinder fixedly connected to the top of the fixing ring, the top of the waste gas outflow cylinder is fixed and communicated with a right-angle pipe, and the right side of the right-angle pipe is fixed and communicated with a blow-out frame; the two sides of the middle of the waste gas outflow cylinder are each provided with a side position hole, each side position hole is fixedly communicated with a sliding frame, and the interiors of the two sliding frames are slidably connected with a sliding plate.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment equipment for iron and steel smelting, and more specifically to a waste gas treatment equipment and treatment method for iron and steel smelting. Background Technology

[0002] As a fundamental pillar industry of the national economy, iron and steel smelting processes, such as blast furnace ironmaking and converter steelmaking, generate large amounts of high-temperature waste gas emissions. Direct emissions not only cause air pollution but may also damage the surrounding ecological environment and equipment due to impurity settling. However, existing waste gas treatment technologies for iron and steel smelting are not suitable for selectively grinding and cleaning the surfaces of the metal screens used to filter the waste gas during the smelting process, preventing the accumulation of thick layers of impurities on the screens that have been used for filtration for a long time, which would make them impossible to clean later. Therefore, this application is proposed to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to provide a waste gas treatment device and method for steel smelting, which allows for selective grinding and cleaning of both sides of the metal screen used for filtering waste gas during the steel smelting process, preventing the metal screen surface from accumulating thick layers of impurities that would otherwise be impossible to clean later.

[0004] The objective of this invention is achieved through the following technical solution: a waste gas treatment device for steel smelting, comprising a fixed ring and a waste gas outlet cylinder fixedly connected to the top of the fixed ring. A right-angle pipe is fixedly connected to the top of the waste gas outlet cylinder, and a blow-out frame is fixedly connected to the right side of the right-angle pipe. A side hole is provided on each side of the middle part of the waste gas outlet cylinder, and a sliding frame is fixedly connected to each side hole. A sliding plate is slidably connected inside the two sliding frames, and multiple screen plates are fixedly connected to the sliding plates. A fixed frame is fixedly connected to the middle part of the waste gas outlet cylinder, and a circular ring frame is fixedly connected to the front side of the fixed frame. A sliding strip hole is provided on the circular ring frame, and a bidirectional grinding mechanism is slidably connected inside the sliding strip hole.

[0005] The two side holes are set to be mirror images of each other.

[0006] Each sliding frame has a display hole in the middle, and the diameter of the display hole is the same as that of the sieve plate. The sliding plate can be aligned with the sieve plate into the display hole by sliding within the two sliding frames.

[0007] An activated carbon filter screen is fixedly connected to the upper side of the inside of the exhaust gas outlet cylinder.

[0008] A horizontal plate is fixedly connected to the right side of the blower frame, and a side plate is fixedly connected to the rear side of the blower frame. A short rod is rotatably connected to the horizontal plate. A fan blade seat is fixedly connected to the left side of the short rod. Multiple fan blades are evenly fixedly connected to the left side of the fan blade seat along the circumferential direction. A power rod is rotatably connected to the side plate. A pulley I is fixedly connected to both the power rod and the short rod. The two pulleys I are connected by a belt I for transmission.

[0009] The method for treating waste gas from iron and steel smelting using the aforementioned treatment equipment includes the following steps: S1: The waste gas outlet tube is fixedly installed at the waste gas inlet on the upper side of the steel smelting cylinder by means of a fixing ring; S2: The residue floating in the generated exhaust gas is initially filtered through the sieve plate, so that the residue adheres to the sieve plate. S3: The screened waste gas passes through an activated carbon filter screen, which filters the waste gas again, adsorbing the residual harmful gases in the waste gas. Then, it enters the blow-out frame through a right-angle tube and is discharged from the blow-out frame. S4: The surface of the screen plate is cleaned by the circular motion of two grinding rollers. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a partial structural schematic diagram of the waste gas outlet tube of the present invention; Figure 2 This is a partial structural schematic diagram of the fixing ring of the present invention; Figure 3 This is a half-sectional structural diagram of the waste gas outlet tube of the present invention; Figure 4 This is a partial structural schematic diagram of the short rod of the present invention; Figure 5 This is a partial structural schematic diagram of the sliding frame of the present invention; Figure 6 This is a partial structural schematic diagram of the sliding plate of the present invention; Figure 7 This is a partial structural schematic diagram of the circular ring frame of the present invention; Figure 8 This is a partial structural schematic diagram of the sliding bar hole of the present invention; Figure 9 This is a partial structural schematic diagram of the lifting rod of the present invention; Figure 10 This is a partial structural schematic diagram of the rotating frame of the present invention; Figure 11 and Figure 12 These are all schematic diagrams of the overall structure of the present invention.

[0012] In the diagram: 101 exhaust gas outlet; 102 right-angle pipe; 103 blowout frame; 104 horizontal plate; 105 side plate; 106 side hole; 107 fixing ring; 108 activated carbon filter; 201 short rod; 202 fan blade seat; 203 fan blade; 204 power rod; 205 pulley I; 206 belt I; 301 sliding frame; 302 display hole; 401 sliding plate; 402 sieve plate; 403 U-shaped strip; 501 fixing frame; 502 circular ring frame; 503 sliding strip hole; 504 concave frame; 505 contact wheel; 506 gripping frame; 601 lifting rod; 602 long strip seat; 603 hydraulic cylinder; 604 vertical rod; 605 rotating frame; 606 side rod; 607 grinding roller; 608 long strip rod; 609 pulley II; 610 belt II. Detailed Implementation

[0013] A waste gas treatment device for steel smelting includes a fixed ring 107 and a waste gas outlet cylinder 101 fixedly connected to the top of the fixed ring 107. A right-angle pipe 102 is fixedly connected to the top of the waste gas outlet cylinder 101. A blow-out frame 103 is fixedly connected to the right side of the right-angle pipe 102. A side hole 106 is provided on each side of the middle part of the waste gas outlet cylinder 101. A sliding frame 301 is fixedly connected to each side hole 106. A sliding plate 401 is slidably connected inside the two sliding frames 301. Multiple screen plates 402 are fixedly connected to the sliding plate 401. A fixed frame 501 is fixedly connected to the middle part of the waste gas outlet cylinder 101. A circular ring frame 502 is fixedly connected to the front side of the fixed frame 501. A sliding strip hole 503 is provided on the circular ring frame 502. A bidirectional grinding mechanism is slidably connected inside the sliding strip hole 503.

[0014] This section is based on Figure 1-8 and Figure 11 , 12The embodiment described herein is as follows: During the steel smelting process, in order to facilitate selective grinding and cleaning of both sides of the metal screen used for screening exhaust gas, and to prevent thick layers of impurities from adhering to the surface of the metal screen after long-term screening of exhaust gas, making it impossible to clean later, the fixing ring 107 is fixedly installed on the steel smelting cylinder with bolts, so that the exhaust gas in the smelting cylinder can rise and flow into the exhaust gas outlet cylinder 101, and then flow into the right-angle pipe 102 through the interior of the exhaust gas outlet cylinder 101. Subsequently, the exhaust gas is discharged through the blow-out frame 103 on the right side of the right-angle pipe 102. Before this, the exhaust gas passes through the screen plate 402 located in the middle of the sliding plate 401. The screen plate 402 is made of metal, so that the waste residue generated by the exhaust gas floating upward during steel smelting is blocked by the screen plate 402, causing the waste residue in the exhaust gas to adhere to the surface of the screen plate 402. After the screen plate 402 is used at any position, the sliding plate 401 slides on both sides. The sliding frame 301 slides within the frame to adjust the alignment of any one of the screen plates 402 with the exhaust gas flow position within the exhaust gas outlet 101. This helps to reduce the amount of waste residue adhering to the surface of any one of the screen plates 402 after long-term filtration, saving work steps and preventing interruptions in the work process by reducing the time spent manually replacing the screen plates 402. The sliding frame 301 on the left is located at the central axis of the ring frame 502. By rotating the bidirectional grinding mechanism and sliding it up and down within the sliding strip hole 503, the user aligns the bidirectional grinding mechanism with the screen plate 402 that has moved to the left sliding frame 301. The bidirectional grinding mechanism then cleans the waste residue adhering to the surface of either side of the screen plate 402, facilitating selective grinding and cleaning of both sides of the metal screen used for filtration of exhaust gas. This prevents the metal screen surface from accumulating thick layers of impurities after long-term filtration of exhaust gas, which would make it difficult to clean later. The structure is simple and easy to use.

[0015] The two side holes are mirrored left and right. This part is based on... Figure 1-8 and Figure 11 , 12 The embodiment described herein is as follows: the two side holes 106 are mirrored left and right, and the sliding frame 301 located on each side hole 106 is mirrored synchronously. By mirroring the sliding frame 301 left and right, it can be ensured that the sliding plate 401 is subjected to uniform force during sliding, avoiding tilting or jamming of the sliding plate 401 due to the deviation of the installation position on both sides, improving the stability and accuracy of the screen plate 402 during switching, and facilitating the standardized installation and maintenance of the sliding frame 301.

[0016] Each sliding frame 301 has a display hole 302 in its middle section. The diameter of the display hole 302 is the same as that of the sieve plate 402. The sliding plate 401 can slide within the two sliding frames 301 to align the sieve plate 402 with the display hole 302. This part is based on Figure 1-8 and Figure 11, 12 The embodiment described herein is as follows: each sliding frame 301 has an exposure hole 302 in its center. The shape of the exposure hole 302 matches that of the sieve plate 402, and the hole diameter is the same as the outer contour size of the sieve plate 402. When the sliding plate 401 slides within the sliding frame 301, it can drive any sieve plate 402 to a position that is completely aligned with the exposure hole 302. At this time, the edge of the sieve plate 402 coincides with the inner wall of the exposure hole 302. The exposure hole 302 provides a precise positioning reference for the sieve plate 402, ensuring that the sieve plate 402 that needs to be polished can be accurately exposed on the outside of the sliding frame 301, which facilitates the bidirectional polishing mechanism to align with and contact the surface of the sieve plate 402.

[0017] An activated carbon filter 108 is fixedly connected to the upper side of the interior of the waste gas outlet 101. This part is based on... Figure 1-8 and Figure 11 , 12 The embodiment described herein is as follows: An activated carbon filter 108 is fixedly connected to the upper side of the interior of the waste gas outlet cylinder 101. This filter has a honeycomb structure, and its edges are tightly fitted to the inner wall of the waste gas outlet cylinder 101, covering the entire cross-section of the waste gas flow. After the waste gas passes through the sieve plate 402 to filter out the waste residue, it continues to flow upward through the activated carbon filter 108 and then enters the right-angle tube 102. The activated carbon filter 108 can adsorb the residual harmful gases in the waste gas, forming a two-stage treatment process of waste residue filtration and harmful gas adsorption with the sieve plate 402, which significantly improves the waste gas purification effect and reduces environmental pollution.

[0018] A horizontal plate 104 is fixedly connected to the right side of the blow-out frame 103, and a side plate 105 is fixedly connected to the rear side of the blow-out frame 103. A short rod 201 is rotatably connected to the horizontal plate 104. A fan blade seat 202 is fixedly connected to the left side of the short rod 201. Multiple fan blades 203 are evenly fixedly connected to the left side of the fan blade seat 202 along the circumferential direction. A power rod 204 is rotatably connected to the side plate 105. A pulley I 205 is fixedly connected to both the power rod 204 and the short rod 201. The two pulleys I 205 are connected by a belt I 206 for transmission.

[0019] This section is based on Figure 1-8 and Figure 11 , 12The embodiment described herein is as follows: a horizontal plate 104 is fixed to the right side of the blow-out frame 103, and a side plate 105 is fixed to the rear side; a short rod 201 is rotatably connected to the horizontal plate 104 via a bearing, and a fan blade seat 202 is fixed to the left side of the short rod 201. The fan blade seat 202 has 3-4 fan blades 203 evenly distributed along the circumference, and the fan blades 203 are located at the outlet of the blow-out frame 103; a power rod 204 is rotatably connected to the side plate 105 via a bearing, and a pulley I 205 is fixed to both the power rod 204 and the short rod 201. The two pulleys I 205 are driven by a belt I 206. The output shaft of a first motor is fixedly connected to the left side of the power rod 204 via a coupling. The first motor is fixedly mounted on the side plate 105 by bolts. When the exhaust gas is discharged from the blow-out frame 103, the first motor is driven to rotate the power rod 204. With the two pulleys I 205 driven by the belt I 206, the fan blade seat 202 on the short rod 201 rotates. Simultaneously, the fan blade 203 located on the fan blade seat 202 rotates. The rotation of the fan blade 203 can enhance the exhaust gas discharge speed, prevent exhaust gas from accumulating in the blow-out frame 103, and accelerate the exhaust gas discharge speed of the entire connecting pipe.

[0020] The bidirectional polishing mechanism includes a concave frame 504 and two sets of contact wheels 505 rotatably connected to the front and rear sides of the concave frame 504. The concave frame 504 is slidably connected in the sliding strip hole 503. Each set of contact wheels 505 is rotatably contacted to the inner and outer surfaces of the ring frame 502. A gripping frame 506 is fixedly connected to the upper middle part of the concave frame 504. A lifting rod 601 is slidably connected to the bottom of the concave frame 504. A long strip seat 602 is fixedly connected to the middle part of the lifting rod 601. A vertical rod 604 is rotatably connected to the middle part of the long strip seat 602. A rotating frame 605 is fixedly connected to the bottom of the vertical rod 604. A side rod 606 is rotatably connected to each side of the bottom of the rotating frame 605. A polishing roller 607 is fixedly connected to each adjacent side of the two side rods 606.

[0021] This section is based on Figures 1-12The embodiment described herein is as follows: When grinding and cleaning the sieve plate 402 that has slid into the middle of the sliding frame 301 located on the left side, the user grasps the gripping frame 506 on the upper middle side of the concave frame 504, causing the concave frame 504 to move in a circular motion on the surface of the ring frame 502 by means of the front and rear sets of bonding wheels 505 with the sliding strip hole 503 as the limit. Each set of bonding wheels 505 rotates and adheres to the inner and outer surfaces of the ring frame 502, thereby achieving the limiting effect of each set of bonding wheels 505. The rollers rotate, and each set of four contact wheels 505 are arranged in pairs, horizontally rotating and contacting the inner and outer surfaces of the ring frame 502. When polishing the upper surface of the sieve plate 402, the user grips the holding frame 506, causing the concave frame 504 to move circumferentially above the ring frame 502 via the sliding strip hole 503. Subsequently, the lifting rod 601 descends on the concave frame 504, causing the polishing rollers 607 located on both sides of the bottom of the rotating frame 605 below it to contact the upper surface of the sieve plate 402. When each side rod 606 rotates, the grinding roller 607 located on the side rod 606 rotates synchronously, thereby using the grinding roller 607 to grind and clean the surface of the screen plate 402. To thoroughly clean the impurities on the upper surface of the screen plate 402, the output shaft of a second motor is fixedly connected to the upper side of the vertical rod 604 via a coupling. The second motor is fixedly mounted on the long strip seat 602 by bolts, driving the second motor to rotate the vertical rod 604, thereby causing the two grinding rollers 607 located below the rotating frame 605 to perform circumferential motion. When the two grinding rollers 607 rotate, the circumferential motion allows the grinding rollers 607 to thoroughly clean the impurities on the upper surface of the screen plate 402. When grinding and cleaning the lower surface of the screen plate 402, it is only necessary to move the concave frame 504 below the circular frame 502. The working steps are the same as above. Furthermore, it helps to perform comprehensive surface cleaning of the screen plate 402 through the bidirectional grinding mechanism, thereby improving the service life of each screen plate 402.

[0022] Each grinding roller 607 has multiple horizontal teeth evenly fixedly connected along its circumference. This part is based on... Figures 1-12 The embodiment described herein is such that each grinding roller 607 has multiple horizontal teeth uniformly and fixedly connected along the circumferential direction, which facilitates the cleaning efficiency by the horizontal teeth on the surface when the grinding roller 607 scrapes and cleans the surface of the sieve plate 402, and also reduces the friction between the horizontal teeth on the grinding roller 607 and the surface of the sieve plate 402.

[0023] A long rod 608 is rotatably connected to the upper side of the rotating frame 605. A pulley II 609 is fixedly connected to the front and rear sides of the long rod 608 and the outer sides of the two side rods 606. The two pulleys II 609 on the front side are connected by a belt II 610, and the two pulleys II 609 on the rear side are connected by another belt II 610. This part is based on... Figures 1-12 The embodiment described herein is as follows: when the side rods 606 on both sides rotate synchronously, the output shaft of a third motor is fixedly connected to the rear side of the long rod 608 via a coupling. The third motor is fixedly connected to the rear side of the rotating frame 605 via bolts, driving the third motor to rotate the long rod 608. The two sets of pulleys II 609 and belts II 610 located on the front and rear sides of the long rod 608 synchronously cause the two side rods 606 to rotate, thereby causing the grinding rollers 607 on the side rods 606 on both sides to rotate synchronously.

[0024] The movable end of a hydraulic cylinder 603 is fixedly connected to the front side of the elongated base 602, and the fixed end of the hydraulic cylinder 603 is fixedly connected to the middle of the lower side of the concave frame 504. This part is based on... Figures 1-12 The embodiment described herein is as follows: A movable end of a hydraulic cylinder 603 is fixedly connected to the front side of the elongated seat 602, and a fixed end of the hydraulic cylinder 603 is fixedly connected to the middle of the lower side of the concave frame 504. When it is necessary to control the lifting rod 601 on the elongated seat 602 to lift and lower, the hydraulic cylinder 603 is driven so that the elongated seat 602 located on the movable end of the hydraulic cylinder 603 can lift and lower on the concave frame 504 by means of the lifting rod 601. This helps to control the degree to which the two grinding rollers 607 are attached to the screen plate 402, thereby controlling the degree of grinding and cleaning of impurities on the surface of the screen plate 402.

[0025] The method for treating waste gas from iron and steel smelting using the aforementioned treatment equipment includes the following steps: S1: The waste gas outlet 101 is fixedly installed at the waste gas inlet on the upper side of the steel smelting cylinder by means of the fixing ring 107; S2: The residue floating in the generated exhaust gas is initially filtered by the sieve plate 402, so that the residue adheres to the sieve plate 402. S3: The screened waste gas passes through the activated carbon filter 108, which filters the waste gas again, adsorbs the residual harmful gases in the waste gas, and then enters the blow-out frame 103 through the right-angle tube 102, and discharges the treated waste gas from the blow-out frame 103. S4: The surface of the sieve plate 402 is cleaned by the circular motion of two grinding rollers 607.

Claims

1. A waste gas treatment device for iron and steel smelting, comprising a fixed ring and a waste gas outlet cylinder fixedly connected to the top of the fixed ring, wherein a right-angle pipe is fixedly connected to the top of the waste gas outlet cylinder, and a blow-out frame is fixedly connected to the right side of the right-angle pipe, characterized in that: The exhaust gas outlet cylinder has a side hole on each side of the middle section. A sliding frame is fixed and connected to each side hole. A sliding plate is slidably connected inside the two sliding frames. Multiple screen plates are fixedly connected to the sliding plates. A fixed frame is fixedly connected to the middle section of the exhaust gas outlet cylinder. A ring frame is fixedly connected to the front side of the fixed frame. The ring frame is provided with a sliding strip hole. A bidirectional grinding mechanism is slidably connected inside the sliding strip hole.

2. The processing apparatus according to claim 1, characterized in that: The two side holes are set to be mirror images of each other.

3. The processing apparatus according to claim 1, characterized in that: Each sliding frame has a display hole in the middle, and the diameter of the display hole is the same as that of the sieve plate. The sliding plate can be aligned with the sieve plate into the display hole by sliding within the two sliding frames.

4. The processing apparatus according to claim 1, characterized in that: An activated carbon filter screen is fixedly connected to the upper side of the inside of the exhaust gas outlet cylinder.

5. The processing apparatus according to claim 1, characterized in that: A horizontal plate is fixedly connected to the right side of the blower frame, and a side plate is fixedly connected to the rear side of the blower frame. A short rod is rotatably connected to the horizontal plate. A fan blade seat is fixedly connected to the left side of the short rod. Multiple fan blades are evenly fixedly connected to the left side of the fan blade seat along the circumferential direction. A power rod is rotatably connected to the side plate. A pulley I is fixedly connected to both the power rod and the short rod. The two pulleys I are connected by a belt I for transmission.

6. The processing apparatus according to claim 1, characterized in that: The bidirectional polishing mechanism includes a concave frame and two sets of contact wheels rotatably connected to the front and rear sides of the concave frame. The concave frame is slidably connected in the sliding strip hole. Each set of contact wheels rotatably contacts the inner and outer surfaces of the ring frame. A gripping frame is fixedly connected to the upper middle part of the concave frame. A lifting rod is slidably connected to the bottom of the concave frame. A long strip seat is fixedly connected to the middle part of the lifting rod. A vertical rod is rotatably connected to the middle part of the long strip seat. A rotating frame is fixedly connected to the bottom of the vertical rod. A side rod is rotatably connected to each side of the bottom of the rotating frame. A polishing roller is fixedly connected to each adjacent side of the two side rods.

7. The processing apparatus according to claim 6, characterized in that: Each grinding roller has multiple horizontal teeth evenly fixedly connected along its circumference.

8. The processing apparatus according to claim 7, characterized in that: A long bar is rotatably connected to the upper side of the rotating frame. A pulley II is fixedly connected to the front and rear sides of the long bar and the outer side of the two side bars. The two pulleys II on the front side are connected by a belt II, and the two pulleys II on the rear side are connected by another belt II.

9. The processing apparatus according to claim 8, characterized in that: The movable end of a hydraulic cylinder is fixedly connected to the front side of the long strip seat, and the fixed end of the hydraulic cylinder is fixedly connected to the middle of the lower side of the concave frame.

10. A method for treating waste gas from iron and steel smelting using the treatment equipment described in any one of claims 1-9, characterized in that: The method includes the following steps: S1: The waste gas outlet tube is fixedly installed at the waste gas inlet on the upper side of the steel smelting cylinder by means of a fixing ring; S2: The residue floating in the generated exhaust gas is initially filtered through the sieve plate, so that the residue adheres to the sieve plate. S3: The screened waste gas passes through an activated carbon filter screen, which filters the waste gas again, adsorbing the residual harmful gases in the waste gas. Then, it enters the blow-out frame through a right-angle tube and is discharged from the blow-out frame. S4: The surface of the screen plate is cleaned by the circular motion of two grinding rollers.

Images