A dispersion particle separation method for sintering furnace exhaust gas

Abstract

The present application relates to the technical field of separation equipment, and discloses a dispersion particle separation method for sintering furnace waste gas treatment, which comprises the following steps: S1, waste gas collection: collecting the waste gas at the source of waste gas generation of the sintering furnace through a gas collecting hood device; S2, temperature reduction pretreatment: avoiding damage to subsequent treatment equipment due to the high temperature of the waste gas of the sintering furnace, and reducing the temperature through a heat exchanger; and S3, coarse particle removal: after the waste gas enters a cyclone dust collector, high-speed rotation is performed. The present application is provided with a flow guide structure, the waste gas is guided through the lower rotation flow guide member, the outer rotation airflow descends along the lower rotation flow guide member, particles are impacted to the wall under the action of centrifugal force in the process of descending, and then the particles slide along the wall to the ash storage part arranged at the bottom of the separation cylinder under the action of gravity and friction force to be collected, and in order to avoid the particles deposited in the ash storage part or near the lower rotation flow guide member from being re-rolled into the airflow, the rising airflow is cleaned again through the upper rotation flow guide member.

Description

Technical Field

[0001] This invention relates to the field of separation equipment technology, and specifically to a method for separating dispersed particles for treating sintering furnace exhaust gas. Background Technology

[0002] Sintering furnace exhaust gas contains a large amount of dispersed particles such as metal oxides, dust, and carbon particles. Direct emission of these particles would severely pollute the environment, harm human health, and impact the surrounding ecosystem. Inertial dust collectors utilize the principle of particle inertia to efficiently separate larger solid particles, including silica and alumina dust from ore raw materials, incompletely burned carbon particles, and some metal oxide agglomerates. They not only effectively reduce the pollutant content in the exhaust gas and alleviate the pressure on subsequent treatment equipment, but also have a relatively simple structure, low cost, and convenient operation and maintenance. They play a crucial pre-dust removal role in the entire sintering furnace exhaust gas purification system, helping to improve the overall efficiency and effectiveness of exhaust gas treatment. They are one of the important pieces of equipment for ensuring environmentally friendly production and sustainable development in the sintering industry.

[0003] In practical applications, errors in equipment manufacturing and installation, structural deformation and displacement caused by internal pressure changes or external vibration and impact during operation, and uneven air intake caused by airflow interference in upstream equipment and intake pipes can all lead to deviations in the tangential air intake angle. Deviations in the tangential air intake angle prevent the formation of a good rotating airflow within the dust collector, causing some airflow to directly impact the center or wall of the dust collector, disrupting the normal airflow rotation pattern. This results in uneven air intake velocity within the effective channel. If the air intake velocity in a cyclone dust collector is unstable, causing sudden changes in local airflow velocity and forming vortices or turbulence, and since there is an upward airflow in the central area to discharge the purified gas, the resulting vortices or turbulence may cause settled dust particles to be entrained in the upward airflow and subsequently carried away. This secondary dust re-enters the purified airflow, increasing the dust content in the discharged gas and directly reducing the dust removal efficiency of the cyclone dust collector. Dust that has already been separated and deposited in the collection tank or on the wall re-enters the airflow, preventing the actual discharged exhaust gas from meeting the expected cleanliness standards and affecting the performance of the entire exhaust gas treatment system. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a method for separating dispersed particles in sintering furnace exhaust gas treatment, which can effectively solve the problem of secondary dust re-entrainment in some existing dust collectors with turbulent airflow.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a method for separating dispersed particles for treating sintering furnace exhaust gas, comprising:

[0008] S1. Waste gas collection: Waste gas is collected at the source of sintering furnace through a gas collection hood device;

[0009] S2. Cooling pretreatment: To prevent the high temperature of the sintering furnace exhaust gas from damaging subsequent processing equipment, cooling is performed through a heat exchanger.

[0010] S3. Coarse particle removal: After the exhaust gas enters the cyclone dust collector, it rotates at high speed. Under the action of centrifugal force, the particles are thrown towards the collection wall of the dust collector, and then settle down along the wall to the bottom of the dust collector under the action of gravity and are discharged. This effectively removes larger particles and reduces the burden on subsequent treatment equipment.

[0011] S4. Baghouse dust collector: After pretreatment, the exhaust gas enters the baghouse dust collector. When the exhaust gas passes through the filter bag, the dispersed particles are intercepted by the filter bag, while the gas is discharged through the filter bag. The baghouse dust collector effectively removes fine particulate matter.

[0012] S5. Wet scrubbing: For waste gas containing acidic or alkaline pollutants, wet scrubbing is adopted. The waste gas enters the scrubbing tower and comes into full contact with the scrubbing liquid. Through chemical reaction and physical absorption, the pollutants in the waste gas are removed.

[0013] S6. Monitoring and Emission: Before exhaust gas is emitted, the concentration of pollutants in the exhaust gas is monitored by online monitoring equipment to ensure that the concentration of pollutants in the exhaust gas meets the national and local emission standards, and the exhaust gas is emitted only after the emission standards are met.

[0014] The cyclone dust collector described in S3 includes a separation cylinder, an exhaust pipe fixedly connected to the top of the separation cylinder, an air inlet pipe fixedly connected to the side of the separation cylinder, and an ash storage section fixedly connected to the bottom of the separation cylinder.

[0015] The separator is divided into a straight chamber and a conical chamber from top to bottom. An air inlet pipe is installed at the top of the straight chamber. A drive structure is fitted on the part of the air inlet pipe located on the inner wall of the straight chamber. A downward swirling guide is installed on the outside of the drive structure. The side of the downward swirling guide is in contact with the side of the separator. An upward swirling guide is installed in the middle of the downward swirling guide. The downward swirling guide and the upward swirling guide together form a flow guiding structure. The downward swirling guide guides the exhaust gas entering the air in the air inlet pipe in a downward swirling direction, and the upward swirling guide guides the rising airflow in the conical chamber in an upward swirling direction.

[0016] The downward-swirling guide includes a guide plate that changes shape to collect particles deposited on its own surface.

[0017] Furthermore, the downward-swirl guide also includes a fixed block that is rotatably sealed to the outside of the drive structure. A guide frame is fixedly connected to the outside of the fixed block. A movable part is provided on the inner side of the guide frame. The upper surface of the movable part is movably connected to the lower surface of the guide plate. An inner guide plate is provided in the middle of the guide plate. The guide plate is rotatably connected to the inner wall of the guide frame through a rotating shaft provided on one side of the bottom end. The bottom end of the inner guide plate is in contact with the middle of the upper surface of the movable part. The guide frame is spiral-shaped. The upper part of the guide plate is located inside the straight barrel compartment, and the upper surface of the guide plate is flush with the lower surface of the air intake pipe.

[0018] Furthermore, the upward-swirling guide includes a second isolation block, a first isolation block, and a dust guide block. The fixed block, the second isolation block, the first isolation block, and the dust guide block are arranged sequentially from top to bottom, and the center lines of the fixed block, the second isolation block, the first isolation block, and the dust guide block coincide. The second isolation block and the first isolation block are both composed of a horn and a straight cylinder. The lower surface of the straight cylinder is fixedly connected to the upper surface of the horn. The bottom dimension of the horn of the second isolation block is smaller than the dimension of the straight cylinder of the second isolation block. A second limiting ring is provided on the outer surface of the horn of the second isolation block, and a first limiting ring is provided on the outer surface of the horn of the first isolation block. The lower part of the outer circumference of the second and first limiting rings is connected to the inner wall of the spiral angle of the guide frame. The dust guide block is located on the inner wall of the dust storage section.

[0019] Furthermore, the drive structure includes a rotating sealing positioning cylinder that rotates with the outer circumference of the intake pipe. The top of the positioning cylinder passes through the top of the straight barrel compartment and is fixedly connected to a gear one. A gear two is meshed with the outer side of the gear one, and a motor is driven through the center of the gear two.

[0020] Furthermore, the lower part of the positioning cylinder is located inside the straight barrel compartment, and a positioning groove is fixedly connected to the outer circumference of the lower part of the positioning cylinder, with the outer side of the positioning groove fitting against the side of the movable part.

[0021] Furthermore, the movable component includes a positioning block that magnetically adheres to the inner wall of the positioning groove. A fixing rod is fixedly connected to the other end of the positioning block. A return spring is sleeved on the outside of the fixing rod. A connecting block is movably connected to the other end of the fixing rod. The connecting block adheres to the side of the guide frame. A rotating plate is provided on the other side of the connecting block. The rotating plate is connected to another rotating plate through a support plate rotatably connected at one end. The top of the support plate adheres to the bottom end of the inner guide plate. The rotating plate is connected to another rotating plate through a tension spring elastically connected to one bottom end.

[0022] Furthermore, in the initial state, the distance between the rotating plates is the shortest, the position of the support plate is the highest, and the end of the positioning block near the positioning groove is embedded in the inner wall of the limiting groove opened at the spiral angle position of the guide frame.

[0023] The technical solution provided by this invention has the following advantages compared with the prior art:

[0024] This invention features a guiding structure. Exhaust gas is guided by a downward swirling guide component, which removes dust particles and other contaminants. Upon entering the dust collector, the dust-laden gas forms an outer swirling airflow. As this airflow descends along the lower guide component, particles collide with the collector wall under centrifugal force. Then, under the influence of gravity and friction, they slide down the wall to the ash storage section at the bottom of the separation cylinder for collection. In the central region of the cyclone dust collector, the rotation of the outer swirling airflow creates an inner swirling upward airflow. This inner swirling upward airflow is primarily composed of relatively clean gas after the separation of particulate matter. The inner swirling upward airflow is discharged through the exhaust pipe at the top of the dust collector, completing the exhaust gas purification process. During this process, it is crucial to ensure an appropriate speed for the inner swirling upward airflow. To prevent excessive speed from re-entraining particles already deposited in the ash storage section or near the lower guide component, which would affect the dust removal efficiency, the upward airflow undergoes further processing by an upper swirling guide component, improving the cleaning quality.

[0025] This invention features an upward-swirling guide component. Accumulated dust falls along the guide block into the inner wall of the dust storage section. The guide block above the collection trough of the dust storage section guides dust and particles, causing them to fall into the collection trough along the outer channel of the guide block. This reduces the accumulation of dust and particles at the opening of the collection trough. Simultaneously, the rapid falling of dust reduces the likelihood of dust accumulation approaching the area of ​​the rising airflow, thus reducing the risk of dust being re-entrained. The rising airflow passes sequentially through isolation block one and isolation block two, and through the horn-shaped tubes of isolation block two and isolation block one, it collides again with some of the dust carried in the rising airflow, further cleaning the rising airflow.

[0026] The present invention is provided with a downward spiral guide, and a guide frame is provided in the space above the ash collection tank. The tail end of the guide frame is located directly above the ash collection tank. While guiding the exhaust gas, the spiral guide frame serves as an effective isolation structure between the ash collection tank and the rising airflow, preventing the rising airflow from directly contacting the dust and swirling it up.

[0027] This invention features a movable component. In the initial state, the distance between the rotating plates is shortest, and the support plate is at its highest position. The end of the positioning block near the positioning groove is embedded in the inner wall of the limiting groove opened at the spiral angle of the guide frame. Under the control of the drive structure, the movable component deforms, causing the downward-spinning guide component that is in contact with the movable component to deform. The guide plate changes between a flush state and a V-shaped state, which allows the dust adhering to the surface of the guide plate to be cleaned without disassembling the device. It also avoids excessive accumulation of dust on the surface of the guide plate and reduces the possibility of it being re-entrained by the rising airflow. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the separation process according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall structure of the cyclone separator according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic cross-sectional view of the cyclone separator according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the split connection of the flow guiding structure according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the linkage structure according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the separation structure of the downward-swirling guide component according to an embodiment of the present invention;

[0035] Figure 7 Embodiments of the present invention Figure 6 Enlarged diagram of point A in the middle.

[0036] The labels in the diagram represent: 1. Separation cylinder; 11. Straight barrel hopper; 12. Conical barrel hopper; 2. Inlet pipe; 3. Exhaust pipe; 4. Ash storage section; 5. Drive structure; 51. Positioning cylinder; 52. Gear 1; 53. Gear 2; 54. Motor; 55. Positioning groove; 6. Downward rotating guide; 61. Guide frame; 611. Limiting groove; 62. Guide plate; 621. Rotating shaft; 63. Inner guide plate; 64. Fixing block; 7. Upward rotating guide; 71. Isolation block 2; 711. Limiting ring 2; 72. Isolation block 1; 721. Limiting ring 1; 73. Ash guide block; 8. Moving part; 81. Positioning block; 82. Fixing rod; 83. Return spring; 84. Rotating plate; 85. Support plate; 86. Tension spring; 87. Connecting block. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The present invention will be further described below with reference to embodiments.

[0039] Example:

[0040] Please see Figures 1-7 This invention provides a method for separating dispersed particles for treating sintering furnace exhaust gas, comprising:

[0041] S1. Waste gas collection: Waste gas is collected at the source of sintering furnace through a gas collection hood device;

[0042] S2. Cooling pretreatment: To prevent the high temperature of the sintering furnace exhaust gas from damaging subsequent processing equipment, cooling is performed through a heat exchanger.

[0043] S3. Coarse particle removal: After the exhaust gas enters the cyclone dust collector, it rotates at high speed. Under the action of centrifugal force, the particles are thrown towards the collection wall of the dust collector, and then settle down along the wall to the bottom of the dust collector under the action of gravity and are discharged. This effectively removes larger particles and reduces the burden on subsequent treatment equipment.

[0044] S4. Baghouse dust collector: After pretreatment, the exhaust gas enters the baghouse dust collector. When the exhaust gas passes through the filter bag, the dispersed particles are intercepted by the filter bag, while the gas is discharged through the filter bag. The baghouse dust collector effectively removes fine particulate matter.

[0045] S5. Wet scrubbing: For waste gas containing acidic or alkaline pollutants, wet scrubbing is adopted. The waste gas enters the scrubbing tower and comes into full contact with the scrubbing liquid. Through chemical reaction and physical absorption, the pollutants in the waste gas are removed.

[0046] S6. Monitoring and Emission: Before exhaust gas is emitted, the concentration of pollutants in the exhaust gas is monitored by online monitoring equipment to ensure that the concentration of pollutants in the exhaust gas meets the national and local emission standards, and the exhaust gas is emitted only after the emission standards are met.

[0047] In the prior art, errors in equipment manufacturing and installation, structural deformation and displacement caused by internal pressure changes or external vibration and impact during operation, and uneven air intake caused by airflow interference in upstream equipment and air intake pipes may all lead to deviations in the tangential air intake angle. The local airflow turbulence caused by such deviations can easily stir up deposited dust, particles, etc. To avoid the above situation, the present invention is provided with a flow guiding structure to guide the flow direction of the exhaust gas entering the separation cylinder 1 through the air intake pipe 2.

[0048] like Figure 2 and Figure 3 As shown, the device includes a separation cylinder 1. An exhaust pipe 3 for outputting clean gas is fixedly connected to the middle of the top of the separation cylinder 1. An air inlet pipe 2 is fixedly connected to the upper part of the outer surface of the separation cylinder 1. The air inlet pipe 2 is connected to a gas collection hood installed above or around the exhaust gas generation source for collecting and transporting exhaust gas. The exhaust gas enters the interior of the separation cylinder 1 through the air inlet pipe 2. A flow guiding structure is provided inside the separation cylinder 1. The flow guiding structure includes a downward swirling flow guide 6 located at the center of the interior of the separation cylinder 1, and flow guides located at the center of the downward swirling flow guide 6 and on its extended center line. The exhaust gas, guided by the upper swirling guide 7 and the lower swirling guide 6, forms an outer swirling airflow after entering the dust collector. As this airflow descends along the lower swirling guide 6, particles collide with the collector wall under centrifugal force. Then, under the influence of gravity and friction, they slide down the wall to the ash storage section 4 at the bottom of the separation cylinder 1 for collection. In the central area of ​​the cyclone dust collector, the rotation of the outer swirling airflow creates an inner swirling upward airflow. This inner swirling upward airflow mainly consists of relatively clean gas after the separation of particles. The inner swirling upward airflow is discharged through the exhaust pipe 3 at the top of the dust collector, completing the exhaust gas purification process. During this process, it is crucial to ensure the appropriate speed of the inner swirling upward airflow. To prevent particles already deposited in the ash storage section 4 or near the lower swirling guide 6 from being re-entrained into the airflow due to excessive speed, thus affecting the dust removal effect, the upward airflow undergoes further processing by the upper swirling guide 7 to improve cleaning quality.

[0049] like Figure 3 and Figure 4As shown, the upper part of the separator 1 is a straight-barrel chamber 11, and the lower part of the separator 1 is a conical-barrel chamber 12. The lower part of the intake pipe 2 is inserted into the straight-barrel chamber 11, and a drive structure 5 is fitted on the outer circumference of this part. A downward-swirl guide 6 is provided on the outside of the drive structure 5. The downward-swirl guide 6 includes a fixing block 64 that rotates and seals with the outer circumference of the drive structure 5. A guide frame 61 is fixedly connected to the outside of the fixing block 64. The guide frame 61 is threaded. The inner wall side of the guide frame 61 is rotatably connected to the bottom end of the guide plate 62 through a rotating shaft 621. The guide plates 62 are symmetrically arranged on the inner wall of the guide frame 61, and the two guide plates 62 are connected by a flexible inner guide plate 63. From top to bottom, the spiral angle of the guide frame 61 is provided with a fixed block 64, an isolation block 2 71, and an isolation block 1 72. Both isolation blocks 2 71 and isolation blocks 1 72 are composed of a horn and a straight cylinder. The lower surface of the straight cylinder is fixedly connected to the upper surface of the horn. The bottom dimension of the horn of isolation block 2 71 is smaller than the dimension of the straight cylinder of isolation block 1 72. The outer surface of the horn of isolation block 2 71 is provided with a limit ring 2 711. The outer surface of the horn of isolation block 1 72 is connected to a limit ring 1 721. The lower part of the outer circumference of the limit ring 2 711 and the limit ring 1 721 is fixedly connected to the inner wall of the spiral angle of the guide frame 61. The ash guide block 73 is located on the inner wall of the ash storage section 4. The outer surface of the ash guide block 73 is provided with multiple inclined guide grooves.

[0050] Accumulated dust falls along the guide block 73 into the inner wall of the ash storage section 4. The guide block 73, located above the collection trough of the ash storage section 4, guides dust and particles, causing them to fall into the collection trough of the ash storage section 4 along the channel outside the guide block 73. This reduces the accumulation of dust and particles at the opening of the collection trough of the ash storage section 4. Simultaneously, the rapid falling of dust reduces the likelihood of dust accumulation approaching the area affected by the rising airflow, thus reducing the risk of dust being re-entrained. Meanwhile, a flow guide 61 is installed above the collection trough of the ash storage section 4. The tail end of the flow guide 61 is located directly above the collection trough of the ash storage section 4. While guiding the exhaust gas, the spiral-shaped flow guide 61 acts as an effective isolation structure between the collection trough of the ash storage section 4 and the rising airflow, preventing the rising airflow from directly contacting and entraining the dust.

[0051] like Figure 6 and Figure 7 As shown, the lower surface of the guide plate 62 is rotatably connected to the inner wall of the guide frame 61 via the rotating shaft 621. The side of the guide plate 62 is flexibly connected with the inner guide plate 63. Therefore, before and after the guide plate 62 is deformed, the upper surface of the guide plate 62 will not collide with other structures. After long-term operation, the upper surface of the guide plate 62 still maintains its original smooth surface, avoiding damage to the guide plate 62, disrupting the normal flow direction of the airflow, affecting the stability of the airflow, generating abnormal airflow vortices, etc., and reducing the possibility of dust being re-entrained into the rising airflow.

[0052] A limiting groove 611 is formed at the helical angle position on the inner wall of the flow guide 61. A movable part 8 is provided on the inner wall of the flow guide 61. The movable part 8 includes a fixed rod 82 embedded in the inner wall of the limiting groove 611. One end of the fixed rod 82 is fixedly connected to a connecting block 87 that is magnetically connected to the positioning groove 55 of the drive structure 5. The connecting block 87 is set in a threaded shape that fits against the inner wall of the flow guide 61. The other end of the connecting block 87 is rotatably connected to multiple rotating plates 84, three of which are set here, respectively at the helical angle position of the flow guide 61. A return spring 83 is sleeved on the outside of the fixed rod 82. Spring 83 is set inside the limiting groove 611. Rotating plate 84 is connected to another rotating plate 84 through a support plate 85 rotatably connected at one end. The top of the support plate 85 is in contact with the bottom of the inner guide plate 63. Rotating plate 84 is connected to another rotating plate 84 through a tension spring 86 elastically connected at one bottom. In the initial state, the positioning block 81 is pulled towards the inner wall of the guide frame 61. At this time, the distance between the rotating plates 84 is the shortest and the support plate 85 is at the highest position. The end of the positioning block 81 near the positioning groove 55 is embedded in the inner wall of the limiting groove 611 opened at the helical angle position of the guide frame 61.

[0053] like Figure 2 and Figure 5 As shown, the drive structure 5 includes a rotating sealing positioning cylinder 51 that rotates with the outer circumference of the air intake pipe 2. The top of the positioning cylinder 51 passes through the top of the straight barrel 11 and is fixedly connected to a gear 52. A gear 53 is meshed with the outer side of the gear 52. A motor 54 is driven to the center of the gear 53. The lower part of the positioning cylinder 51 is located inside the straight barrel 11, and a positioning groove 55 is fixedly connected to the outer circumference of the lower part of the positioning cylinder 51. The outer side of the positioning groove 55 engages with the side of the positioning block 81.

[0054] During the waste gas treatment process, since dispersed particles have a certain surface energy, they will come into contact with the walls and internal components of the sintering furnace waste gas treatment equipment. Under the influence of intermolecular forces, physical adsorption will occur. The surface atoms of the tiny metal oxide particles in the waste gas will attract each other with the atoms of the equipment wall, thus adhering to it. There are sulfur oxides in the waste gas. When they encounter the metal material of the equipment wall, a chemical reaction may occur to generate metal sulfides, causing the particles to firmly adhere to the wall surface. The dust cannot be effectively separated by inertial force. Some large dust particles may be thrown onto the upper surface of the guide plate 62. In order to avoid the adhering particles from reacting chemically with the metal wall surface, gradually corroding the metal and shortening the service life of the equipment, and to avoid the increasing number of adhering particles making cleaning difficult and increasing the cost and time of equipment maintenance, this invention is equipped with a drive structure 5 and a moving part 8 for cleaning.

[0055] The operator starts motor 54, and the output of motor 54 drives gear 2 53 to rotate. Gear 2 53 rotates, which in turn drives gear 1 52, which meshes with it, to rotate. Gear 1 52 rotates on the outside of the air intake pipe 2, while simultaneously driving the positioning cylinder 51 to rotate. The rotation of the positioning cylinder 51 drives the positioning groove 55 to rotate. Initially, the positioning block 81 is in contact with the outer surface of the positioning cylinder 51 until the positioning cylinder 51 rotates and moves the positioning groove 55 to a position flush with the positioning block 81. The positioning block 81 enters the magnetic field space of the positioning groove 55 and moves towards the positioning groove 55 against the elastic force of the return spring 83. The positioning groove 55 is arc-shaped, and as the positioning cylinder 51 rotates, the positioning block 81 can smoothly move out of the positioning groove 55. The movement of the positioning block 81 towards the positioning groove 55 drives the connecting block 87 to move synchronously. The movement of the connecting block 87 pulls multiple rotating plates. 84 moves synchronously. As the rotating plate 84 moves to one side of the guide frame 61, the support plate 85 moves downward accordingly. At this time, the connection between the guide plate 62 and the inner guide plate 63 is not supported by the highest support plate 85. Under the action of gravity, the guide plate 62 will rotate around the rotating shaft 621 as the center to the inner wall of the guide frame 61. The guide plate 62 and the inner guide plate 63 change from being flush with the guide frame 61 to a V-shape. The dust particles adhering to the surface of the guide plate 62 will slide along the inclined guide plate 62 under the action of gravity, inertia and friction. With multiple deformations, the dust particles adhering to the surface of the guide plate 62 will be gradually vibrated and cleaned into the dust storage part 4. The dust adhering to the surface of the guide plate 62 can be cleaned without disassembling the device. This also avoids the accumulation of too much dust on the upper surface of the guide plate 62 and reduces the possibility of it being re-entrained by the rising airflow.

[0056] Simultaneously, the reciprocating movement of the connecting block 87 drives the three fixed rods 82 on the side to move synchronously. The movement of the fixed rods 82 drives the positioning block 81 to move. Except for the magnetic interaction between the top positioning block 81 and the positioning groove 55, the remaining two positioning blocks 81 strike the horn tubes of the second isolation block 71 and the first isolation block 72 respectively, so that the second isolation block 71 and the first isolation block 72 clean the dust particles adhering to them during the second cleaning process of the rising airflow, and the particles slide off the horn tubes of the second isolation block 71 and the first isolation block 72 under the action of vibration.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for separating dispersed particles in sintering furnace exhaust gas treatment, characterized in that, include: S1. Waste gas collection: Waste gas is collected at the source of sintering furnace through a gas collection hood device; S2. Cooling pretreatment: To prevent the high temperature of the sintering furnace exhaust gas from damaging subsequent processing equipment, cooling is performed through a heat exchanger. S3. Coarse particle removal: After the exhaust gas enters the cyclone dust collector, it rotates at high speed. Under the action of centrifugal force, the particles are thrown towards the collection wall of the dust collector, and then settle down along the wall to the bottom of the dust collector under the action of gravity and are discharged. This effectively removes larger particles and reduces the burden on subsequent treatment equipment. S4. Baghouse dust collector: After pretreatment, the exhaust gas enters the baghouse dust collector. When the exhaust gas passes through the filter bag, the dispersed particles are intercepted by the filter bag, while the gas is discharged through the filter bag. The baghouse dust collector effectively removes fine particulate matter. S5. Wet scrubbing: For waste gas containing acidic or alkaline pollutants, wet scrubbing is adopted. The waste gas enters the scrubbing tower and comes into full contact with the scrubbing liquid. Through chemical reaction and physical absorption, the pollutants in the waste gas are removed. S6. Monitoring and Emission: Before exhaust gas is emitted, the concentration of pollutants in the exhaust gas is monitored by online monitoring equipment to ensure that the concentration of pollutants in the exhaust gas meets the national and local emission standards, and the exhaust gas is emitted only after the emission standards are met. Among them, the cyclone dust collector in S3 includes a separation cylinder (1), an exhaust pipe (3) is fixedly connected to the top of the separation cylinder (1), an air inlet pipe (2) is fixedly connected to the side of the separation cylinder (1), and a ash storage part (4) is fixedly connected to the bottom of the separation cylinder (1). The separator (1) is divided into a straight chamber (11) and a conical chamber (12) from top to bottom. An air inlet pipe (2) is provided at the top of the straight chamber (11). A drive structure (5) is sleeved on the part of the air inlet pipe (2) located on the inner wall of the straight chamber (11). A downward swirling guide (6) is provided on the outside of the drive structure (5). The side of the downward swirling guide (6) is attached to the side of the separator (1). An upward swirling guide (7) is provided in the middle of the downward swirling guide (6). The downward swirling guide (6) and the upward swirling guide (7) together form a guide structure. The downward swirling guide (6) guides the exhaust gas entering the air in the air inlet pipe (2) in a downward swirling direction. The upward swirling guide (7) guides the rising airflow in the conical chamber (12) in an upward swirling direction. The downward swirling guide (6) includes a guide plate (62) that changes shape to collect particles deposited on its surface.

2. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 1, characterized in that: The downward-swirl guide (6) also includes a fixed block (64) that is rotatably sealed to the outside of the drive structure (5). A guide frame (61) is fixedly connected to the outside of the fixed block (64). A movable part (8) is provided on the inside of the guide frame (61). The upper surface of the movable part (8) is movably connected to the lower surface of the guide plate (62). An inner guide plate (63) is provided in the middle of the guide plate (62). The guide plate (62) is rotatably connected to the inner wall of the guide frame (61) through a rotating shaft (621) provided on one side of the bottom end. The bottom end of the inner guide plate (63) is attached to the middle of the upper surface of the movable part (8). The guide frame (61) is set in a spiral shape. The upper part of the guide plate (62) is located inside the straight barrel compartment (11), and the upper surface of the guide plate (62) is flush with the lower surface of the air intake pipe (2).

3. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 2, characterized in that: The upward-swirling guide (7) includes a second isolation block (71), a first isolation block (72), and a dust guide block (73). The fixed block (64), the second isolation block (71), the first isolation block (72), and the dust guide block (73) are arranged sequentially from top to bottom, and the center lines of the fixed block (64), the second isolation block (71), the first isolation block (72), and the dust guide block (73) coincide. The second isolation block (71) and the first isolation block (72) are both composed of a horn and a straight cylinder. The lower surface of the straight cylinder is flush with the horn. The upper surface of the cylinder is fixedly connected. The bottom dimension of the horn tube of the second isolation block (71) is smaller than the straight tube dimension of the first isolation block (72). The outer surface of the horn tube of the second isolation block (71) is provided with a second limiting ring (711). The outer surface of the horn tube of the first isolation block (72) is provided with a first limiting ring (721). The lower part of the outer circumference of the second limiting ring (711) and the first limiting ring (721) is connected to the inner wall of the spiral angle of the guide frame (61). The ash guide block (73) is located on the inner wall of the ash storage part (4).

4. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 2, characterized in that: The drive structure (5) includes a sealing positioning cylinder (51) that rotates around the outer surface of the air intake pipe (2). The top of the positioning cylinder (51) passes through the top of the straight barrel (11) and is fixedly connected to a gear one (52). The gear one (52) is meshed with a gear two (53) on the outside. The gear two (53) is driven by a motor (54) at the center.

5. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 4, characterized in that: The lower part of the positioning cylinder (51) is located inside the straight barrel compartment (11), and a positioning groove (55) is fixedly connected to the outer circumference of the lower part of the positioning cylinder (51). The outer side of the positioning groove (55) is in contact with the side of the movable part (8).

6. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 5, characterized in that: The movable component (8) includes a positioning block (81) that magnetically adheres to the inner wall of the positioning groove (55). A fixing rod (82) is fixedly connected to the other end of the positioning block (81). A reset spring (83) is sleeved on the outside of the fixing rod (82). A connecting block (87) is movably connected to the other end of the fixing rod (82). The connecting block (87) adheres to the side of the guide frame (61). A rotating plate (84) is provided on the other side of the connecting block (87). The rotating plate (84) is connected to another rotating plate (84) through a support plate (85) rotatably connected at one end. The top end of the support plate (85) adheres to the bottom end of the inner guide plate (63). The rotating plate (84) is connected to another rotating plate (84) through a tension spring (86) elastically connected to one bottom end.

7. The method for separating dispersed particles for treating sintering furnace exhaust gas according to claim 6, characterized in that: In the initial state, the distance between the rotating plates (84) is the shortest, the position of the support plate (85) is the highest, and the end of the positioning block (81) near the positioning groove (55) is embedded in the inner wall of the limiting groove (611) opened at the helical angle of the guide frame (61).

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