Flue and boiler

Abstract

The present invention discloses a flue, including a furnace mouth section flue, the furnace mouth section flue includes a movable section flue, a fixed section flue, a moving device, a lifting support device and a fixed connection device, the movable section flue and the fixed section flue are connected; the lifting support device is used to support the fixed section flue in the height direction, and fix the fixed section flue at a height position to connect with the movable section flue through the fixed connection device, after releasing the connection between the fixed connection device and the fixed section flue, the fixed section flue is driven to descend by descending in the height direction of the lifting support device to disconnect the connection with the movable section flue; the movable end flue is connected to the moving device, and the movable end flue is driven to move by the moving device. The present invention also discloses a boiler having the flue, and the present invention can realize partial replacement or overall replacement of the flue.

Description

Technical Field

[0001] The invention relates to the technical field of flues, and in particular to a flue and a boiler. Background Art

[0002] The converter vaporization flue is a device that recovers the sensible heat of the high-temperature flue gas generated during the converter steelmaking process, and sends the flue gas to the subsequent dust removal system after reducing it to a certain temperature. Since a large amount of high-temperature flue gas is generated during the converter blowing process, the flue temperature is usually as high as 2000°C, and the reaction in the converter is fierce, and there is also the risk of slag splashing. The furnace mouth section flue is the closest component to the converter except for the skirt cover. The furnace mouth section flue is more susceptible to the influence of the converter, resulting in a shorter service life of the furnace mouth section flue, which needs to be replaced after one to two years. The bottom of the furnace mouth section flue is the position closest to the converter furnace mouth, which is more prone to water leakage, damage, etc., and needs to be repaired or replaced regularly; but due to the small space of the furnace mouth section, it is inconvenient to repair or replace only the bottom of the furnace mouth section flue. In the prior art, the entire furnace mouth section flue is usually replaced as a whole, but this method is time-consuming and labor-intensive, and it is impossible to replace it in sections according to the damage or leakage of the flue, and the replacement cost is higher. Summary of the invention

[0003] Therefore, the present invention proposes a flue and a boiler to achieve partial replacement and overall replacement of the flue.

[0004] The present invention adopts the following technical solution:

[0005] A flue, comprising a furnace mouth section flue, the furnace mouth section flue comprising a movable section flue, a fixed section flue, a moving device, a lifting support device and a fixed connection device, the movable section flue and the fixed section flue are connected; it is defined that after being fixed, the fixed section flue has a side facing the ground in the height direction as a bottom side, the other side away from the bottom side as a top side, and the front and rear sides are located on a vertical plane and perpendicular to the top and bottom sides; the lifting support device is used to support the fixed section flue in the height direction, and to fix the fixed section flue at a height position so as to connect it with the movable section flue through the fixed connection device, and after the connection between the fixed connection device and the fixed section flue is released, the fixed section flue is driven to descend by descending the lifting support device in the height direction to disconnect the connection with the movable section flue; the mobile end flue is connected to the moving device, and the mobile end flue is driven to move by the moving device.

[0006] In order to facilitate the connection between the movable section flue and the fixed section flue, the movable section flue and the fixed section flue are connected through a detachable plug-in fit.

[0007] Among them, in order to ensure the sealing effect of the connecting part of the movable section flue and the fixed section flue, the movable section flue and the fixed section flue are connected by a sealing connection device, and the sealing connection device includes a sealing plug plate and a sealing groove. The sealing plug plate is arranged on the bottom side of the movable section flue, and the sealing groove is arranged on the top side of the fixed section flue. The sealing plug plate is inserted into the sealing groove to connect the movable section flue with the fixed section flue. The sealing groove is driven to move downward so that the sealing plug plate is disengaged from the sealing groove, thereby disconnecting the connection between the movable section flue and the fixed section flue.

[0008] In order to ensure the sealing plug plate is limited in the sealing groove, a guide limiting device is also included, and the sealing plug plate is limited in the sealing groove when the movable section flue is connected to the fixed section flue through the guidance of the guide limiting device.

[0009] Among them, in order to fix the fixed section of the flue at a height position so that it is connected to the movable section of the flue, the fixed section of the flue is provided with a first fixed bracket, and the lifting support device includes a jack and a support frame, the first fixed bracket is fixedly connected to the support frame, and the jack is arranged in the support frame to support the fixed section of the flue in the height direction.

[0010] Among them, in order to ensure the descent of the fixed section of the flue in the height direction, the fixed connection device is a pin. When the fixed section of the flue is located at a height position connected to the movable section of the flue, the pin fixes the first fixed bracket and the support frame to fix the fixed section of the flue; pull out the pin, lower the jack, and drive the fixed section of the flue to descend in the height direction.

[0011] Among them, in order to ensure the sealing effect of the bottom side of the fixed section flue, it also includes a movable smoke hood, which can be raised and lowered at the bottom side of the fixed section flue. The movable smoke hood is raised to make way for the fixed section flue to descend in the height direction, and the movable smoke hood is lowered to keep the bottom side of the fixed section flue in a sealed state.

[0012] Wherein, in order to drive the movement of the movable section flue, the two ends of the bottom side of the movable section flue are connected to the movable device through the second fixed bracket, and the movable device is supported on the table top and moves on the table top.

[0013] Among them, in order to ensure the supporting effect of the mobile device on the mobile section flue, the mobile section flue is provided with a bending area, and the mobile section flue is located at the position of the opening of the bending area and a third fixed bracket is correspondingly provided, and the other end of the third fixed bracket is connected to the mobile device.

[0014] Among them, for the convenience of assembly, the moving device includes a driving motor, a frame and wheels. The frame is provided with a fixed seat for placing the moving section flue, and a mounting seat connected to the second fixed bracket and the third fixed bracket. The wheels are connected under the frame, and the frame is driven by the driving motor to drive the moving section flue to move.

[0015] Among them, further, it also includes a main flue, which is connected to the furnace mouth section flue, and the bottom side of the main flue is connected to the top side of the moving section flue through a compensator, and the moving section flue is disconnected from the main flue by disconnecting the compensator.

[0016] Based on the above-mentioned flue, the present invention further proposes a boiler, comprising a boiler and any of the above-mentioned flues, wherein the flue is arranged at the top of the boiler.

[0017] Wherein, further, the boiler is a converter waste heat boiler.

[0018] After adopting the above scheme, the present invention has the following beneficial effects: the fixed section flue is supported in the height direction by the lifting support device, and the fixed section flue is fixed at a height position so as to be connected with the movable section flue by the fixed connection device. After the connection between the fixed connection device and the fixed section flue is released, the fixed section flue is driven down by the lowering of the lifting support device in the height direction to disconnect the connection with the movable section flue; then the movable section flue is driven to move by the moving device to make the old movable section flue give way, so as to facilitate the installation of the new movable section flue and realize the partial replacement of the flue. The present invention can complete the partial replacement of the flue while facilitating the replacement of the entire flue, and has a simple structure and is easy to operate.

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of embodiment 1 of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of another angle of embodiment 1 of the present invention. Figure 2 ;

[0022] Figure 3 is a top view of embodiment 1 of the present invention;

[0023] Figure 4 is a schematic structural diagram of a sealing connection device according to Embodiment 1 of the present invention;

[0024] Figure 5 is a schematic structural diagram of a lifting support device according to Embodiment 1 of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the transverse shifting trolley of embodiment 1 of the present invention. DETAILED DESCRIPTION

[0026] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] At the same time, the directions such as front, back, left, and right involved in this embodiment are only used as a reference for directions and do not represent directions in actual use.

[0028] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0029] Embodiment 1:

[0030] See also Figures 1 to 6 As shown, as a preferred embodiment of the present invention, a flue is provided, including a furnace mouth section flue and a main flue 3, wherein the furnace mouth section flue is segmented in the vertical section, and is divided into a furnace mouth fixed section flue 1 and a furnace mouth movable section flue 2. During steelmaking, a large amount of waste gas and smoke overflow from the converter mouth, and the waste gas and smoke are first captured by the movable smoke hood 5, and then enter the dust removal system and the recovery system through the flue located above the movable smoke hood 5. In this embodiment, the direction of the fixed section flue 1 in a fixed use state is used as the description direction, that is, the side facing the ground is the bottom side, the other side away from the bottom side is the top side, and the front and rear sides are located on a vertical plane and perpendicular to the top and bottom sides.

[0031] The fixed section flue 1 and the movable section flue 2 are connected by detachable plug-in fitting. Specifically, the top side of the fixed section flue 1 is connected to the movable section flue 2 by a sealing connection device 4. A first upper header 11 is provided at both ends of the top side of the fixed section flue 1, and a first lower header 12 is provided at both ends of the bottom side of the fixed section flue 1; a second upper header 21 is provided at both ends of the top side of the movable section flue 2, and a second lower header 22 is provided at both ends of the bottom side of the movable section flue 2; the sealing connection device 4 includes a sealing plug plate 41 and a sealing groove 42. The sealing plug plate 41 is provided on the second lower header 22 on the bottom side of the movable section flue 2, and the sealing groove 42 is provided on the first upper header 11 on the top side of the fixed section flue 1. The sealing plug plate 41 is inserted into the sealing groove 42 to connect the movable section flue 2 with the fixed section flue 1; wherein, the sealing medium in the sealing groove 42 is sand or water to absorb the downward thermal expansion displacement of the movable section flue 2 and the upward thermal expansion displacement of the fixed section flue 1. The sealing connection device 4 is also provided with a guide and limit device 43. When the movable section flue 2 is connected to the fixed section flue 1 by the guidance of the guide and limit device 43, the sealing plug plate 41 is limited in the sealing groove 42. The guide and limit device 43 has a plug slot and a plug plate. The plug slot and the plug plate are arranged on the same side. The plug slot is arranged on one side of the second lower header 22, and the plug plate is arranged on one side of the first upper header 11. The plug plate and the plug slot are aligned and plugged to achieve the guide and limit of the sealing connection device 4. When the movable section flue 2 needs to be replaced, the sealing groove 42 is driven to move downward, so that the sealing plug plate 41 is disengaged from the sealing groove 42, and the connection between the movable section flue 2 and the fixed section flue 1 is disconnected.

[0032] The fixed section flue 1 is also provided with a lifting support device 10 and a fixed connection device 30. The lifting support device 10 supports the fixed section flue 1 in the height direction, and the fixed connection device 30 fixes the fixed section flue 1 at a height position so that it is connected to the movable section flue 2. After the connection between the fixed connection device 30 and the fixed section flue 1 is released, the lifting support device 10 is lowered in the height direction, driving the fixed section flue 1 to descend so as to disconnect the connection with the movable section flue 2. Specifically, a first fixed bracket 13 is fixedly provided on the front and rear sides of the fixed section flue 1. There are two lifting support devices 10 and fixed connection devices 30, which are respectively arranged on the front and rear sides of the fixed section flue 1. The lifting support device 10 is arranged on the platform beam, and the position of the platform beam is the height position where the fixed section flue 1 is connected to the movable section flue 2. The lifting support device 10 includes a support frame 101 and a jack 102. The first fixed bracket 13 is fixedly connected to the support frame 101, and the jack 102 is arranged in the support frame 101 to support the fixed section flue 1 in the height direction; the fixed connection device 30 is a pin. When the fixed section flue 1 is located at a height position connected to the movable section flue 2, the pin fixes the first fixed bracket 13 and the support frame 101 on the platform beam to fix the fixed section flue 1. Pulling out the pin and lowering the jack 102 can drive the fixed section flue 1 to descend in the height direction. When the mobile flue 2 needs to be replaced, the jack 102 is first slightly lifted to transfer the pressure of the fixed flue 1 to the jack 102. Then, the pin can be easily pulled out to release the fixed connection between the support frame 101 and the platform beam. At this time, the first fixed bracket 13 is still supported on the support frame 101. The jack 102 is lowered, and the fixed flue 1 can be driven by the jack 102 to drop to a certain height, so as to make way for the mobile flue 2 to move, so as to facilitate the replacement of the mobile flue 2. In other embodiments, the lifting support device 10 and the fixed connection device 30 can adopt different structures, which are not limited herein.

[0033] The bottom side of the fixed section flue 1 is connected to the movable smoke hood 5, which can be lifted and lowered on the bottom side of the fixed section flue 1. The movable smoke hood 5 is lifted to allow the fixed section flue to descend in the height direction, and the movable smoke hood 5 descends to keep the bottom side of the fixed section flue and the converter furnace mouth sealed. The movable smoke hood 5 includes a smoke hood body, on which a plurality of annular heat absorbing pipes are arranged, and a circular gas seal manifold is arranged on the top of the smoke hood body. A plurality of injection pipes for injecting steam or nitrogen are arranged at intervals in the circumferential direction of the gas seal manifold. One end of the injection pipe is connected to the gas seal manifold, and the other end goes deep into the top of the smoke hood body. A plurality of hangers are arranged on the outside of the smoke hood body, and a guide wheel is arranged at the upper end of each hanger, and the smoke hood body can be driven to rise and fall on the lifting track through the guide wheel. When the converter is working normally, the movable smoke hood 5 is lowered and arranged between the converter waste heat boiler and the fixed section flue 1. By injecting steam or nitrogen, the amount of air entering from the gap between the converter furnace port and the flue is reduced, and smoke is prevented from leaking from the gap. When the fixed section flue 1 needs to be lowered, the movable smoke hood 5 is raised to make way for the fixed section flue 1. In other embodiments, the movable smoke hood 5 may be other structures, which are not limited herein.

[0034] The mobile section flue 2 is connected to the mobile device 20, and the mobile section flue 2 is driven to move by the mobile device 20. Specifically, a second fixed bracket 23 is fixedly provided at both ends of the bottom side of the mobile section flue 2, and the other end of the second fixed bracket 23 is connected to the mobile device 20. The mobile device 20 is supported on the table and moves on the table. In this embodiment, the mobile section flue 2 is also provided with a bending area. In order to enable the mobile device 20 to play a role in stably supporting the mobile section flue 2, the mobile section flue 2 is also provided with a third fixed bracket 24 at the position facing the opening of the bending area, and the other end of the third fixed bracket 24 is fixedly connected to the mobile device 20. The mobile device 20 includes a drive motor 201, wheels, and a frame. The frame is provided with a fixing seat 202 of the mobile section flue 2, and a mounting seat 203 connected to the second fixing bracket 23 and the third fixing bracket 24. The frame is connected to wheels below. The frame is driven by a driving motor to drive the mobile section flue 2 to move back and forth on the table to remove the old mobile section flue 2 and make way for the new mobile section flue 2 to be replaced. The new mobile section flue 2 is transferred to the top of the fixed section flue 1, so as to replace only the mobile section flue 2 without replacing the entire flue. In other embodiments, the mobile device 20 can be other structures, which are not limited herein.

[0035] The two ends of the top side of the moving section flue 2 are connected to the two ends of the bottom side of the main flue 3 through the compensator 6. Specifically, the two ends of the top side of the flue 3 are provided with a third upper connecting box, and the two ends of the bottom side of the main flue 3 are provided with a third lower connecting box 31; the compensator 6 includes a compensator outer sleeve and an annular inner baffle. The compensator outer sleeve is fixedly installed on the third lower connecting box 31 on the bottom side of the main flue 3 by bolts, and the annular inner baffle is fixedly installed on the second upper connecting box 21 on the top side of the moving section flue 2 by bolts, and the outer edge of the annular inner baffle is abutted on the compensator outer sleeve to connect the moving section flue 2 and the main flue 3; when the moving section flue 2 and the main flue 3 expand or contract due to temperature changes, the outer edge of the annular inner baffle slides along the inner wall of the compensator outer sleeve to keep the total length of the flue unchanged, thereby eliminating the internal stress of the flue.

[0036] The replacement process of the flue for the mobile section flue 2 is as follows:

[0037] The connecting bolts between the compensator outer sleeve 61 and the main flue 3, as well as the connecting bolts between the annular inner baffle 62 and the movable section flue 2 are manually unscrewed to disconnect the connection between the top side of the movable section flue 2 and the bottom side of the main flue 3, thereby facilitating the subsequent forward and backward movement of the movable section flue 2.

[0038] After that, the jack 102 is slightly lifted to transfer the pressure of the fixed section flue 1 to the jack 102. Then, the pin can be easily pulled out to release the fixed connection between the support frame 101 and the platform beam. At this time, the first fixed bracket 13 is still supported on the support frame 101, and the jack 102 is lowered. The fixed section flue 1 can be lowered to a certain height driven by the jack 102; the lowering of the fixed section flue 1 disconnects the sealing connection device 4 between the mobile section flue 2 and the fixed section flue 1, that is, the sealing groove 42 drops, so that the sealing plug plate 41 is separated from the sealing groove 42, thereby disconnecting the fixed section flue 1 and the mobile section flue 2. The movable section flue 2 is connected; finally, the movable device 20 is moved to make the movable section flue 2 leave from above the fixed section flue 1, and the new movable section flue 2 is moved to above the fixed section flue 1, and the compensator 6 between the top side of the new movable section flue 2 and the bottom side of the main flue 3 is tightened to realize the connection between the top side of the new movable section flue 2 and the bottom side of the main flue 3, and the lifting support device 10 is driven to rise, so that the sealing connection device 4 between the new movable section flue 2 and the fixed section flue 1 is connected, so that the bottom side of the new movable section flue 2 is connected to the top side of the fixed section flue 1, and the mobile section 2 is replaced. The present invention can not only realize the overall replacement of the entire flue, but also carry out partial replacement for the movable section flue 2 that is more prone to leakage or damage, saving time and labor, and reducing replacement costs.

[0039] Embodiment 2:

[0040] This embodiment provides a boiler. Preferably, the boiler is a converter waste heat boiler, including a boiler and a flue. The flue is the flue provided in Embodiment 1, and the flue is arranged at the top of the boiler.

[0041] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A flue, including a furnace mouth section flue, characterized in that: The furnace mouth section flue comprises a movable section flue, a fixed section flue, a movable device, a lifting support device and a fixed connection device, and the movable section flue is connected to the fixed section flue; it is defined that after being fixed, the fixed section flue is defined as having a side facing the ground in the height direction as the bottom side, and the other side away from the bottom side as the top side, and the front and rear sides are located on a vertical plane and perpendicular to the top and bottom sides; the lifting support device is used to support the fixed section flue in the height direction, and to fix the fixed section flue at a height position to be connected with the movable section flue through the fixed connection device, and after the connection between the fixed connection device and the fixed section flue is released, the fixed section flue is driven to descend by descending the lifting support device in the height direction to disconnect the connection with the movable section flue; the movable section flue is connected to the movable device, and the movable section flue is driven to move by the movable device; The movable section flue and the fixed section flue are connected by detachable plug-in fitting; The flue also includes a movable smoke hood, which is liftably arranged on the bottom side of the fixed section flue.

2. The flue according to claim 1, characterized in that: The movable section flue is connected to the fixed section flue through a sealing connection device, which includes a sealing plug plate and a sealing groove. The sealing plug plate is arranged on the bottom side of the movable section flue, and the sealing groove is arranged on the top side of the fixed section flue. The movable section flue is connected to the fixed section flue by inserting the sealing plug plate into the sealing groove. The sealing groove is driven downward to disengage the sealing plug plate from the sealing groove, thereby disconnecting the connection between the movable section flue and the fixed section flue.

3. The flue according to claim 2, characterized in that: It also includes a guide and limit device, through which the sealing plug plate is limited in the sealing groove when the movable section flue is connected to the fixed section flue.

4. The flue according to claim 1, characterized in that: The fixed section flue is provided with a first fixed bracket, and the lifting support device includes a jack and a support frame. The first fixed bracket is fixedly connected to the support frame, and the jack is arranged in the support frame to support the fixed section flue in the height direction.

5. The flue according to claim 4, characterized in that: The fixed connection device is a pin. When the fixed section flue is located at a height position connected to the movable section flue, the pin fixes the first fixed bracket and the support frame to fix the fixed section flue; the pin is pulled out, the jack is lowered, and the fixed section flue is driven to descend in the height direction.

6. The flue according to claim 1, characterized in that: The movable smoke hood is raised to allow the fixed section flue to descend in the height direction, and the movable smoke hood is lowered to keep the bottom side of the fixed section flue in a sealed state.

7. The flue according to claim 1, characterized in that: The two ends of the bottom side of the movable section flue are connected to the movable device through a second fixed bracket, and the movable device is supported on the table top and moves on the table top.

8. The flue according to claim 7, characterized in that: The movable section flue is provided with a bending area, and a third fixed bracket is provided corresponding to the position of the movable section flue located at the opening direction of the bending area, and the other end of the third fixed bracket is connected to the movable device.

9. The flue according to claim 8, characterized in that: The moving device includes a driving motor, a frame and wheels. The frame is provided with a fixing seat for placing the moving section flue, and a mounting seat connected to the second fixing bracket and the third fixing bracket. The wheels are connected to the bottom of the frame. The frame is driven by the driving motor to drive the moving section flue to move.

10. The flue according to claim 1, characterized in that: It also includes a main flue, which is connected to the furnace mouth section flue, and the bottom side of the main flue is connected to the top side of the moving section flue through a compensator. The moving section flue is disconnected from the main flue by disconnecting the compensator.

11. A boiler, characterized in that: It comprises a boiler and a flue as claimed in any one of claims 1 to 10, wherein the flue is arranged on the top of the boiler.

12. The boiler according to claim 11, characterized in that: The boiler is a converter waste heat boiler.

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