A sintering machine waste heat recovery device

Abstract

The present application belongs to the technical field of sintering process waste heat recycling, and particularly relates to a sintering machine waste heat recycling device. The present application provides a sintering machine waste heat recycling device, which is characterized in that heat exchange components, support distance adjusting components, distance adjusting transmission components and synchronous driving components are arranged around the four inclined outer walls of the air bellow main body, so that: 1. The heat lost by the outer walls of the air bellow is absorbed by the multilayer closed heat exchange ring pipes, and the water supply is preheated, thereby improving the utilization degree of the waste heat of the outer walls of the air bellow; 2. The heat exchange ring pipes of different layers are synchronously driven to move along the normal direction of the inclined outer walls, and the differential distance adjusting and zigzag compensation structures are matched, so that the heat exchange distance at different height positions is changed, and the heat exchange conditions are adapted to the heat states of different regions of the air bellow.

Description

Technical Field

[0001] This invention belongs to the field of waste heat recovery and utilization technology in sintering process, and particularly relates to a waste heat recovery device for improving sintering machines. Background Technology

[0002] Waste heat recovery from sintering machines is a crucial aspect of energy conservation in the steel sintering process. During sintering, the high-temperature flue gas in the tail section of the sintering machine carries a significant amount of heat. Besides entering the main flue with the flue gas, it continuously transfers heat to the outer shell of the sintering machine, causing the outer wall of the sintering machine to reach a high temperature and dissipate heat to the surrounding environment. Existing waste heat recovery technologies primarily target the heat carried by the sintering flue gas, recovering and utilizing it through flue gas pipelines, heat exchangers, or waste heat boilers.

[0003] For example, Chinese invention patent application with publication number CN103292605A and application publication date of September 11, 2013, discloses a waste heat recovery system for sintering machine tail flue gas. It includes a sintering machine tail air box, exhaust branch pipe, bypass exhaust branch pipe, bypass exhaust main pipe, heat exchanger, and waste heat boiler. A bypass exhaust structure is set on the exhaust branch pipe from the sintering machine tail air box to the main flue, so that the high temperature flue gas at the tail is introduced into the heat exchanger and exchanges heat with water through the heat exchanger. The flue gas after heat exchange is then returned to the main flue. Its general working principle is as follows: a portion of high-temperature flue gas is drawn out from the exhaust path of the tail section of the air box, and the high-temperature flue gas enters an independently set heat exchanger through the bypass exhaust branch pipe and the bypass exhaust main pipe. The heat of the flue gas is recovered through indirect heat exchange between the flue gas and the water in the heat exchanger. The heat-exchanged flue gas is then sent back to the main flue. Since the heat exchange object is high-temperature dusty flue gas, the corresponding system needs to be equipped with a flue gas bypass, control valve, ash removal structure and flue gas side heat exchanger. It is also necessary to consider issues such as flue gas resistance, ash accumulation, wear, corrosion and maintenance.

[0004] For example, Chinese invention patent application CN103925808A, published on July 16, 2014, discloses a system and method for efficient recovery and utilization of waste heat from sintering machine flue gas. It utilizes a main exhaust waste heat boiler to recover the waste heat from the high-temperature flue gas at the tail of the sintering machine. The main exhaust waste heat boiler is equipped with heat-receiving components such as an economizer and an evaporator. The boiler feedwater is heated by the economizer and then enters the steam drum to form a sintering waste heat recovery water-steam system. The high-temperature flue gas at the tail of the sintering machine is still the main heat extraction target, and the high-temperature flue gas enters the main exhaust waste heat boiler to complete the heat exchange.

[0005] However, the above-mentioned waste heat recovery structure for sintering machines still has at least the following shortcomings in actual use, which are the technical problems that this invention aims to solve: 1. Existing waste heat recovery structures for sintering machines mainly target the high-temperature flue gas in the wind box and main flue for heat extraction. This requires the high-temperature flue gas to enter the corresponding flue gas pipeline or the heating surface of the waste heat boiler. However, during long-term operation, the high-temperature wind box at the tail of the sintering machine will continue to transfer heat to the wind box shell, keeping the outer wall of the wind box at a high temperature and continuously dissipating heat to the surrounding environment. Some of the heat cannot be fully utilized by the existing waste heat recovery structure, resulting in a lack of usable heat. 1. Heat loss increases the heat load on the surrounding environment of the sintering machine tail duct. 2. Different parts of the sintering machine tail duct are affected by factors such as flue gas temperature, sintering operation status, and the duct's own structure. The temperature of its outer wall and the intensity of heat dissipation vary and will change with the actual operating conditions. When recovering the heat lost from the outer wall of the duct, the actual usable heat in different parts is not consistent. Using a single, fixed heat exchange condition is difficult to take into account the heat demand of different areas and under different operating conditions. It is easy to have insufficient heat utilization in some areas or a mismatch between heat exchange capacity and actual heat load, which affects the stable utilization of waste heat on the outer wall of the duct.

[0006] Therefore, in summary, there is an urgent need for a new type of waste heat recovery device for sintering machines that can fully utilize the heat lost from the outer wall of the sintering machine's wind box while taking into account the actual thermal state of different areas. Summary of the Invention

[0007] This invention provides a waste heat recovery device for a sintering machine. By arranging heat exchange components, support and adjustment components, adjustment transmission components, and synchronous drive components around the four inclined outer walls of the main body of the wind box, it achieves the following: 1. The multi-layer closed heat exchange loops absorb the heat lost from the outer wall of the wind box and preheat the water supply, thereby improving the utilization of waste heat from the outer wall of the wind box; 2. By synchronously driving each layer of heat exchange loops to move along the normal direction of the inclined outer wall, and in conjunction with differential adjustment and tortuous compensation structures, the heat exchange spacing at different height positions is changed, so that the heat exchange conditions are adapted to the thermal state of different areas of the wind box.

[0008] The technical solution adopted by the present invention to solve the above problems is: a waste heat recovery device for sintering machines, comprising: a wind box body having four inclined outer walls connected sequentially along the circumference, with an edge formed between two adjacent inclined outer walls; a heat exchange assembly including multiple layers of closed heat exchange loops spaced apart along the height direction of the wind box body, each layer of heat exchange loops surrounding the wind box body and including four heat exchange tube segments extending along the four inclined outer walls respectively and an arc-shaped connecting tube segment connecting two adjacent heat exchange tube segments, each heat exchange tube segment being provided with a tortuous compensation tube segment, the tortuous compensation tube segment being composed of... The corresponding heat exchange tube segments are continuously bent and extend in a zigzag pattern along their extension direction; adjacent layers of heat exchange ring tubes are connected by interlayer connecting pipes, and multiple layers of heat exchange ring tubes together form a heat exchange flow path, with the inlet and outlet pipes connected to both ends of the heat exchange flow path; the support adjustment assembly includes multiple mounting ring frames spaced along the height direction of the wind box body on the outside of the wind box body and corresponding to the multiple layers of heat exchange ring tubes, each mounting ring frame having four mounting plates corresponding to the four inclined outer walls, and multiple guide rails fixedly mounted on each mounting plate. Multiple guide rails are spaced apart along the extension direction of the corresponding heat exchange tube segments. Each guide rail extends along the normal direction of the corresponding inclined outer wall. A retaining plate supporting the corresponding heat exchange tube segment is slidably mounted on each guide rail. Multiple retaining plates on the same mounting plate are fixedly connected by a linkage plate. The adjustable transmission assembly includes four edge rotating rods respectively arranged along the extension direction of the four edges. The four edge rotating rods are rotatably mounted on multiple mounting rings and correspond one-to-one with the four inclined outer walls. Each edge rotating rod has a heat exchanger fixedly mounted at intervals along its axial direction. Each ring tube has multiple driving gears corresponding to it. Each linkage plate is fixedly mounted with a rack arranged along the extension direction of the corresponding guide rail. Each driving gear meshes with the corresponding rack. The multiple driving gears on each edge rotating rod include a first driving gear and a second driving gear corresponding to the two layers of heat exchange ring tubes. The pitch circle diameter of the first driving gear is larger than that of the second driving gear. The synchronous driving assembly includes a rotary driving component and a synchronous transmission mechanism. The rotary driving component is connected to the four edge rotating rods through the synchronous transmission mechanism.

[0009] A further preferred technical solution is that: the multiple layers of heat exchange ring tubes are arranged sequentially in the vertical direction, the inlet pipe is connected to the heat exchange ring tube located at the lower end of the arrangement, and the outlet pipe is connected to the heat exchange ring tube located at the upper end of the arrangement; the two ends of the interlayer connecting pipe are respectively connected to the two adjacent layers of heat exchange ring tubes through tee connectors, and the interlayer connecting pipe is provided with a compensating connecting pipe section formed by continuous bending of its pipe body.

[0010] A further preferred technical solution is that: the tortuous compensation pipe section is located in a plane parallel to the corresponding inclined outer wall, and forms multiple arc-shaped bends along its pipeline direction, with the bending directions of two adjacent arc-shaped bends being opposite.

[0011] A further preferred technical solution is that: each of the mounting plates has multiple guide rails, including a first guide rail, a middle guide rail, and a second guide rail arranged sequentially along the extension direction of the corresponding heat exchange tube segment; a first end plate, a middle plate, and a second end plate are slidably mounted on the first guide rail, the middle guide rail, and the second guide rail, respectively; the first end plate and the second end plate respectively support the tube body of the heat exchange tube segment located on both sides of the tortuous compensation tube segment; the middle plate supports the middle tube body of the tortuous compensation tube segment; the first end plate, the middle plate, and the second end plate are fixedly connected by the linkage plate; the first end plate, the middle plate, and the second end plate are respectively provided with tube body support holes for the corresponding tube body to pass through; the tube body support holes and the tube body passing through them slide in a sliding fit along the axial direction of the tube body.

[0012] A further preferred technical solution is that, along the direction from bottom to top of the bellows body, the pitch circle diameters of the multiple drive gears on the same edge rotating rod increase sequentially.

[0013] A further preferred technical solution is that: each of the mounting rings further includes an arc-shaped transition plate that is fixedly connected to two adjacent mounting plates, and bearing seats are fixedly installed on each of the arc-shaped transition plates arranged along the extension direction of each edge, and the corresponding edge rotating rods are sequentially rotated through each of the bearing seats arranged along the extension direction of the edge.

[0014] A further preferred technical solution is that the synchronous transmission mechanism includes four universal drive shafts, four synchronous shafts, four synchronous sprockets, and a closed transmission chain. The four universal drive shafts are respectively connected to the upper ends of the four edge rotating rods and the four synchronous shafts. The axes of the four synchronous shafts are parallel to each other. The four synchronous sprockets are respectively fixedly installed on the four synchronous shafts and located in the same horizontal transmission plane. The closed transmission chain is sequentially connected to the four synchronous sprockets. The rotary drive component is connected to one of the four synchronous shafts.

[0015] A further preferred technical solution includes a reflective insulation component, which comprises a support frame fixedly installed on the outside of the main body of the wind box and surrounding the periphery of the multi-layer heat exchange ring pipe, an insulation shell plate fixedly installed on the support frame, and a heat radiation reflective layer disposed on the surface of the insulation shell plate facing the heat exchange ring pipe; the support frame is fixedly installed on the outside of the main body of the wind box.

[0016] A further preferred technical solution includes a vibration damping and guiding component. Multiple clamping plates on the same mounting plate include a central clamping plate supporting the middle section of the tortuous compensation pipe body. The vibration damping and guiding component includes two limiting plates fixedly installed on the support frame and located on both sides of the central clamping plate. Buffer components are fixedly installed on the surfaces of the two limiting plates facing the central clamping plate. Multiple guide slots are provided on the central clamping plate, spaced vertically. The distance between the opposite side walls of each guide slot gradually increases along the direction corresponding to the guide rail from the wind box body towards the support frame. A toothed guide plate is fixedly installed between the two limiting plates. The toothed guide plate has multiple guide teeth, which extend into the multiple guide slots.

[0017] A further preferred technical solution includes a waste heat recovery component, which comprises an economizer, a steam drum, and an evaporator; the water outlet pipe is connected to the water inlet of the economizer, the water outlet of the economizer is connected to the water supply port of the steam drum, the circulating water outlet of the steam drum is connected to the water inlet of the evaporator, and the steam-water outlet of the evaporator is connected to the steam-water return port of the steam drum.

[0018] The technical effects and advantages of this invention are as follows: 1. The multi-layer closed heat exchange loop is arranged around the four inclined outer walls of the wind box body, which can absorb the heat transferred outward from the outer wall of the wind box and use it to heat the water inside the tubes, increasing the recovery path for heat dissipation from the outer wall of the sintering machine wind box; 2. The support adjustment component, the adjustment transmission component, and the synchronous drive component cooperate with each other to drive the heat exchange tube sections on the four sides to move in a coordinated manner along the normal direction of the corresponding inclined outer wall, and form corresponding interlayer adjustment amounts through drive gears with different pitch circle diameters, so that the heat exchange loops of different heights can form an adjustable heat exchange loop. 3. The tortuous compensation pipe section adopts a continuous reciprocating bending structure, which can increase the length of the heat exchange pipe and the heat exchange area of ​​the pipe body in a limited arrangement area. At the same time, it adapts to the changes in the outer dimension of the closed heat exchange loop pipe when the distance is adjusted by unfolding and retracting, taking into account both heat exchange enhancement and pipe deformation compensation; 4. The multi-point clamping plate support, the synchronous movement of the linkage plate and the four-sided synchronous transmission structure work together to maintain the support and movement coordination during the adjustment of the heat exchange pipe section, so that the multi-layer closed heat exchange loop pipe maintains a continuous and stable heat exchange flow path when the heat exchange position is changed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is a perspective view of the main body of the bellows in this invention.

[0022] Figure 3 This is a perspective view of the concealed bellows body and insulation shell in this invention.

[0023] Figure 4 for Figure 3 A magnified view of part A in the image.

[0024] Figure 5 This is a top view of the heat exchange component in this invention.

[0025] Figure 6 This is a perspective view of the windbox body and reflective insulation components hidden in this invention.

[0026] Figure 7 This is a front cross-sectional view of the present invention.

[0027] Figure 8 This is a top view of the present invention.

[0028] Figure 9 This is a schematic diagram showing the connection of the two bellows bodies in series in this invention.

[0029] Figure 10 This is a schematic diagram showing the parallel connection of the two bellows bodies in this invention.

[0030] The meanings of the markings in the diagram are as follows: 1. Main body of the wind box; 2. Heat exchange assembly; 3. Support and adjustment assembly; 4. Adjustment transmission assembly; 5. Synchronous drive assembly; 6. Reflective insulation assembly; 7. Vibration damping and guiding assembly; 8. Waste heat recovery assembly. Inclined outer wall 11, edge 12, heat exchange ring pipe 21, interlayer connecting pipe 22, water inlet pipe 23, water outlet pipe 24, tee connector 25, water supply main pipe 26, water collection main pipe 27, mounting ring frame 31, guide rail 32, clamping plate 33, linkage plate 34, edge rotating rod 41, drive gear 42, rack 43, bearing seat 44, rotary drive component 51, synchronous transmission mechanism 52, support frame 61, heat insulation shell plate 62, heat radiation reflective layer 63, limiting plate 71, buffer component 72, guide groove 73, toothed guide plate 74, economizer 81, steam drum 82, evaporator 83; Heat exchanger pipe section 211, arc-shaped connecting pipe section 212, tortuous compensation pipe section 213, compensation connecting pipe section 221 Mounting plate 311, arc-shaped transition plate 312, first guide rail 321, middle guide rail 322, second guide rail 323, first end clamping plate 331, middle clamping plate 332, second end clamping plate 333, tube support hole 334, first drive gear 421, second drive gear 422, universal drive shaft 521, synchronous shaft 522, synchronous sprocket 523, closed drive chain 524, tensioning wheel 525, guide tooth 741. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0032] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc., mentioned or possibly mentioned in this specification are defined relative to the structure shown in the accompanying drawings. The terms "inner" and "outer" refer to the direction toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0033] As attached Figure 1-10 As shown, this embodiment provides a waste heat recovery device for a sintering machine. The waste heat recovery device is installed outside the high-temperature section air box of the sintering machine, utilizing the heat transferred outward from the air box body 1 to preheat water. The device includes the air box body 1, a heat exchange assembly 2, a support and adjustment assembly 3, an adjustment transmission assembly 4, and a synchronous drive assembly 5. The device also includes a reflective insulation assembly 6, a vibration damping and guiding assembly 7, and a waste heat recovery assembly 8. Figure 2 As shown, the bellows body 1 has four inclined outer walls 11 connected sequentially along the circumference. The four inclined outer walls 11 enclose an external frustoconical region of the bellows body 1. The intersection of two adjacent inclined outer walls 11 forms an edge 12. The four edges 12 extend inclinedly along the height direction of the bellows body 1. The inclined outer walls 11 constitute the main heat-extracting area of ​​the heat exchange assembly 2. During the operation of the sintering machine, high-temperature flue gas transfers heat to the bellows body 1. The temperature of the inclined outer walls 11 rises accordingly and transfers heat to the periphery of the bellows body 1. The heat exchange assembly 2 is located on the periphery of the inclined outer walls 11, allowing some of this heat to enter the water inside the heat exchange assembly 2.

[0034] like Figure 5-7As shown, the heat exchange assembly 2 includes multiple layers of closed heat exchange loops 21, which are spaced apart along the height of the air box body 1. Each layer of heat exchange loops 21 forms a closed water passage around the four inclined outer walls 11, and each layer of heat exchange loops 21 includes four heat exchange tube segments 211. The four heat exchange tube segments 211 correspond to the four inclined outer walls 11, and each heat exchange tube segment 211 extends along the corresponding inclined outer wall 11. A heat exchange gap is left between each heat exchange tube segment 211 and the corresponding inclined outer wall 11. Adjacent heat exchange tube segments 211 are connected by arc-shaped connecting tube segments 212, which are located near the four edges 12 of the air box body 1. The four heat exchange tube segments 211 and the four arc-shaped connecting tube segments 212 are connected end to end in sequence, thereby forming a continuous closed heat exchange loop 21.

[0035] The arc-shaped connecting pipe section 212 extends in an arc shape and connects to two adjacent heat exchange pipe sections 211 facing different directions, moving together with the position changes of the two adjacent heat exchange pipe sections 211. Each heat exchange pipe section 211 is provided with a tortuous compensation pipe section 213, which is part of the heat exchange pipe section 211 itself. The tortuous compensation pipe section 213 is formed by continuously bending the heat exchange pipe section 211 and continuously bending back and forth along the extension direction of the heat exchange pipe section 211. The entire tortuous compensation pipe section 213 is located in a plane parallel to the corresponding inclined outer wall 11. The tortuous compensation pipe section 213 has multiple continuous arc-shaped bends, with adjacent arc-shaped bends bending in opposite directions, thereby forming a continuous wavy pipe. The tortuous compensation pipe section 213 maintains the continuity of the pipe cavity, allowing water to pass directly through it. The tortuous compensation pipe segment 213 compensates for the length of the contour formed by the closed heat exchange loop 21. When the four heat exchange pipe segments 211 move outward along the normal direction corresponding to the inclined outer wall 11, the outer dimension formed by the closed heat exchange loop 21 in the same layer increases, and the tortuous compensation pipe segment 213 expands accordingly. The bending amplitude of the tortuous compensation pipe segment 213 changes with the change in the outer dimension of the closed heat exchange loop 21. When the four heat exchange pipe segments 211 move inward along the normal direction corresponding to the inclined outer wall 11, the outer dimension formed by the closed heat exchange loop 21 in the same layer decreases, and the tortuous compensation pipe segment 213 contracts accordingly. The tortuous compensation pipe segment 213 absorbs the change in pipe length generated by the closed heat exchange loop 21 during the adjustment process through this expansion and contraction. This ensures that the closed heat exchange loop 21 remains continuous throughout the entire pitch adjustment process. The arc-shaped connecting pipe section 212 mainly undertakes the pipe turning and follow-up connection of adjacent two surfaces. The tortuous compensation pipe section 213 is used to absorb the pipe length change generated by the closed heat exchange loop 21 during the pitch adjustment process.

[0036] The multiple layers of heat exchange loop tubes 21 are connected by interlayer connecting pipes 22. The interlayer connecting pipes 22 extend between adjacent layers of heat exchange loop tubes 21, and both ends of the interlayer connecting pipe 22 are connected to the adjacent two layers of heat exchange loop tubes 21 via tee connectors 25. The tee connectors 25 are disposed on the pipes of the closed heat exchange loop tubes 21, with two ports maintaining circumferential communication with the corresponding closed heat exchange loop tubes 21. The other port of the tee connector 25 is connected to the corresponding interlayer connecting pipe 22. Heat exchange loop tubes 21 at intermediate heights are connected to the interlayer connecting pipes 22 located below and above them, respectively. The heat exchange loop 21 located at the middle height is provided with a water inlet tee connector 25 and a water outlet connector 25. The water entering the heat exchange loop 21 flows along the two circumferential flow paths formed by the closed heat exchange loop 21, and after merging at the water outlet, it enters the interlayer connecting pipe 22 of the next layer, thereby making the multiple layers of heat exchange loop 21 form a complete heat exchange flow path in sequence.

[0037] The interlayer connecting pipe 22 is provided with a compensating connecting pipe section 221, which is formed by continuous bending of the interlayer connecting pipe 22 itself. The compensating connecting pipe section 221 has a continuous curved pipe path. When the positions of two adjacent layers of heat exchange ring pipes 21 change, the compensating connecting pipe section 221 changes shape accordingly to absorb the relative displacement between the two adjacent layers of heat exchange ring pipes 21 and reduce the additional load at the interlayer connection position. The multiple layers of heat exchange ring pipes 21 are arranged sequentially in the vertical direction. The inlet pipe 23 communicates with the heat exchange ring pipe 21 located at the lower end of the arrangement, and the outlet pipe 24 communicates with the heat exchange ring pipe 21 located at the upper end of the arrangement. Water enters the lower heat exchange ring pipe 21 from the inlet pipe 23, absorbs the heat transferred by the inclined outer wall 11 through the corresponding heat exchange pipe section 211 and the tortuous compensation pipe section 213, and then enters the upper heat exchange ring pipe 21 through the interlayer connecting pipe 22. The water flows upward layer by layer according to this water path, and the water after completing multi-layer heat exchange is discharged from the outlet pipe 24.

[0038] like Figure 3As shown, the support adjustment assembly 3 includes multiple mounting ring frames 31, which are spaced apart along the height direction of the air box body 1. Each mounting ring frame 31 corresponds to multiple layers of heat exchange loops 21. Each mounting ring frame 31 includes four mounting plates 311, which correspond to four inclined outer walls 11. Each mounting plate 311 extends outward from the periphery of the corresponding inclined outer wall 11. The mounting plates 311 provide fixed mounting positions for the guide rail 32, clamping plate 33, and linkage plate 34 on the corresponding side. An arc-shaped transition plate 312 is fixedly connected between adjacent mounting plates 311. The four mounting plates 311 and the four arc-shaped transition plates 312 are sequentially connected along the circumference of the air box body 1, thereby forming a complete mounting ring frame 31. The arc-shaped transition plate 312 is located on the periphery of the corresponding edge 12 and provides an intermediate support position for the edge rotating rod 41. Multiple mounting ring frames 31 of different heights thus constitute a multi-layer support structure.

[0039] Each mounting plate 311 is provided with multiple guide rails 32, which are fixedly mounted on the mounting plate 311. The multiple guide rails 32 are arranged at intervals along the extension direction of the corresponding heat exchange tube section 211, and each guide rail 32 extends along the normal direction of the corresponding inclined outer wall 11.

[0040] In this embodiment, as Figure 7 As shown, the same mounting plate 311 is provided with a first guide rail 321, a middle guide rail 322, and a second guide rail 323. The first guide rail 321, the middle guide rail 322, and the second guide rail 323 are parallel to each other, and the three guide rails correspond to the three support positions of the heat exchange tube section 211. A first end clamping plate 331 is slidably installed on the first guide rail 321, a middle clamping plate 332 is slidably installed on the middle guide rail 322, and a second end clamping plate 333 is slidably installed on the second guide rail 323. The first end clamping plate 331 supports the heat exchange tube section 211 located at both ends of the tortuous compensation tube section 213. The middle of the tortuous compensation tube section 213 is provided with a straight pipe support section for the middle clamping plate 332 to support. The straight pipe support section passes through the tube body support hole 334 of the middle clamping plate 332 and slides with the tube body support hole 334 along the axial direction of the straight pipe support section. The first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 jointly bear the weight of the corresponding heat exchange tube section 211 and its internal water. The three clamping plates transfer the load to the three guide rails 32, which in turn transfer the load to the mounting plate 311 and the mounting ring frame 31, thus providing support to both end areas and the middle area of ​​the heat exchange tube section 211. When the tortuous compensation tube section 213 expands and contracts, its own weight is still borne by the middle clamping plate 332.

[0041] The first end plate 331, the middle plate 332, and the second end plate 333 are fixedly connected by a linkage plate 34. The linkage plate 34 spans the three plates along the extension direction of the heat exchange tube segment 211, forming an integral movable structure. When the linkage plate 34 moves along the guide rail 32, the first end plate 331, the middle plate 332, and the second end plate 333 move synchronously along the corresponding first guide rail 321, middle guide rail 322, and second guide rail 323, respectively. The two end regions and the middle region of the heat exchange tube segment 211 move synchronously with the three plates, ensuring that multiple support positions of the same heat exchange tube segment 211 move synchronously in the normal direction. The first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 are each provided with a tube support hole 334. The tubes of the heat exchange tube segment 211 at corresponding positions pass through the tube support holes 334, and the tube support holes 334 and the corresponding tubes form an axial sliding fit. The tube support holes 334 support the heat exchange tube segment 211 vertically and normally, and the heat exchange tube segment 211 retains sliding freedom along its own tube axis. When the tortuous compensation tube segment 213 unfolds or retracts, the heat exchange tube segment 211 can generate axial movement in the tube support hole 334 in coordination with the compensation action, so that the clamping plate 33 bears the weight and normal movement load of the heat exchange tube segment 211. The length compensation of the tube itself is completed by the tortuous compensation tube segment 213 and the axial sliding in the tube support hole 334.

[0042] When assembling the closed heat exchange loop 21, the first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 are first fitted onto the corresponding tube body positions. The arc-shaped connecting pipe section 212 is then connected to two adjacent heat exchange pipe sections 211, forming the closed heat exchange loop 21 while maintaining the complete structure of the tube body support hole 334.

[0043] like Figure 6 and Figure 7As shown, the pitch adjustment transmission assembly 4 includes four edge-rotating rods 41, which are respectively arranged along the extension direction of the four edges 12. Each of the four edge-rotating rods 41 corresponds one-to-one with one of the four inclined outer walls 11, and each edge-rotating rod 41 drives the heat exchange tube section 211 on one side of a corresponding inclined outer wall 11 to adjust its pitch. Each arc-shaped transition plate 312 of each mounting ring 31 is fixedly mounted with a bearing seat 44, and multiple arc-shaped transition plates 312 arranged along the extension direction of the same edge 12 form multiple support positions corresponding to the edge-rotating rods 41. The edge-rotating rods 41 are sequentially rotated through the multiple bearing seats 44 arranged along the extension direction of the edges 12. The multiple bearing seats 44 are spaced apart axially along the edge-rotating rods 41, and together they provide rotational support for the edge-rotating rods 41. Each of the edge-mounted rotating rods 41 is fixedly mounted with multiple drive gears 42 at axial intervals. The multiple drive gears 42 correspond to the heat exchange ring tubes 21 at different heights. Each of the linkage plates 34 is fixedly mounted with a rack 43, and each rack 43 is arranged along the extension direction of the corresponding guide rail 32. Each rack 43 meshes with the drive gear 42 at the corresponding height.

[0044] When the edge-shaped rotating rod 41 rotates, multiple driving gears 42 fixed on the edge-shaped rotating rod 41 rotate synchronously. Each driving gear 42, through meshing with the corresponding rack 43, converts the rotation of the edge-shaped rotating rod 41 into linear movement of the corresponding rack 43 along the direction of the guide rail 32. The rack 43 drives the corresponding linkage plate 34 to move, and the linkage plate 34 drives the corresponding first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 to move synchronously. The three clamping plates 33 together drive the corresponding heat exchange tube section 211 to move along the normal direction of the corresponding inclined outer wall 11. The multiple driving gears 42 on each edge-shaped rotating rod 41 include a first driving gear 421 and a second driving gear 422. The first driving gear 421 and the second driving gear 422 respectively correspond to two layers of heat exchange annular tubes 21, and the pitch circle diameter of the first driving gear 421 is larger than that of the second driving gear 422. When the edge rotating rod 41 rotates through the same angle, the rack 43 corresponding to the first driving gear 421 and the rack 43 corresponding to the second driving gear 422 generate linear displacements corresponding to their respective pitch circle radii, thereby obtaining the corresponding normal adjustment amount of the two layers of heat exchange ring tubes 21.

[0045] In this embodiment, along the direction from bottom to top of the bellows body 1, the pitch circle diameters of the multiple drive gears 42 on the same edge rotating rod 41 increase sequentially. When the edge rotating rod 41 rotates through the same angle, the multiple drive gears 42 respectively drive the corresponding rack 43 to produce a linear displacement corresponding to their respective pitch circle radii, thereby forming an adjustable distance relationship of the multi-layer heat exchange annular tubes 21 along the height direction of the bellows body 1. The specific pitch circle diameter of the drive gear 42 should be determined according to the required normal stroke of the corresponding heat exchange annular tube 21. This embodiment does not limit the specific module, number of teeth, and pitch circle diameter values ​​of the drive gear 42, but should determine them in combination with the actual size of the bellows body 1 and the adjustable distance range of the heat exchange annular tubes 21.

[0046] like Figure 7 and Figure 8As shown, the synchronous drive assembly 5 includes a rotary drive component 51 and a synchronous transmission mechanism 52. The synchronous transmission mechanism 52 includes four universal drive shafts 521, four synchronous shafts 522, four synchronous sprockets 523, and a closed transmission chain 524. The four edge-shaped rotating rods 41 are arranged along four inclined edges 12, and the four synchronous shafts 522 are arranged on the upper part of the bellows body 1, with their axes parallel to each other. The four edge-shaped rotating rods 41 are respectively arranged between the four edge-shaped rotating rods 41 and the four synchronous shafts 522. One end of each universal drive shaft 521 is connected to the upper end of the corresponding edge-shaped rotating rod 41, and the other end of each universal drive shaft 521 is connected to the corresponding synchronous shaft 522. The universal drive shafts 521 adapt to the spatial orientation relationship between the edge-shaped rotating rods 41 and the synchronous shafts 522, and transmit rotational power between them. Each of the synchronous shafts 522 is fixedly mounted with a synchronous sprocket 523. The four synchronous sprockets 523 are located in the same horizontal transmission plane. The closed transmission chain 524 is sequentially wound around the four synchronous sprockets 523, forming a transmission engagement with them. The synchronous transmission mechanism 52 also includes a tensioning wheel 525, which is disposed between two adjacent synchronous sprockets 523 and engages with the closed transmission chain 524 located between two synchronous sprockets 523. The tensioning wheel 525 applies tension to the closed transmission chain 524, maintaining its engagement with the four synchronous sprockets 523 and reducing chain slippage caused by chain slack during operation. The shaft mounting position of the tensioning wheel 525 can be adjusted towards or away from the closed transmission chain 524, allowing adjustment of the tension of the closed transmission chain 524 by changing the position of the tensioning wheel 525. The rotary drive 51 is connected to one of the four synchronous shafts 522. When the rotary drive 51 outputs rotational power, the synchronous shaft 522 connected to it drives the corresponding synchronous sprocket 523 to rotate. The synchronous sprocket 523 drives the closed transmission chain 524 to run. The closed transmission chain 524 then drives the other three synchronous sprockets 523 to rotate. Thus, the four synchronous shafts 522 form a synchronous transmission relationship.

[0047] The four synchronous shafts 522 drive the four edge-rotating rods 41 via the four universal drive shafts 521. The four edge-rotating rods 41 then drive the heat exchange tube segments 211 corresponding to the four inclined outer walls 11 via corresponding drive gears 42 and racks 43. When the rotary drive 51 rotates in one direction, the racks 43 corresponding to the four inclined outer walls 11 move away from the wind box body 1, and the corresponding heat exchange tube segments 211 move away from the inclined outer walls 11 along with the clamping plate 33. When the rotary drive 51 rotates in the opposite direction, the racks 43 corresponding to the four inclined outer walls 11 move towards the wind box body 1, and the corresponding heat exchange tube segments 211 move towards the inclined outer walls 11 along with the clamping plate 33. The drive gears 42 and racks 43 corresponding to the four inclined outer walls 11 are arranged in the same direction of movement for adjusting the pitch, so that the heat exchange tube sections 211 on the four sides can move together toward the inclined outer wall 11 or move together away from the inclined outer wall 11.

[0048] like Figure 1 , Figure 3 and Figure 7 The reflective insulation component 6 is disposed around the heat exchange component 2. The reflective insulation component 6 includes a support frame 61, an insulation shell plate 62, and a heat radiation reflective layer 63. The support frame 61 is disposed outside the main body 1 of the air box and surrounds the multi-layer heat exchange ring pipes 21, forming the supporting foundation of the reflective insulation component 6. The insulation shell plate 62 is fixedly installed on the support frame 61. Multiple insulation shell plates 62 surround the multi-layer heat exchange ring pipes 21, forming, together with the support frame 61, the outer structure surrounding the heat exchange component 2. Heat transferred from the inclined outer wall 11 to the periphery enters the area where the heat exchange ring pipes 21 are located. The heat exchange ring pipes 21 absorb a portion of this heat, which continues to propagate outwards. A portion of the heat radiation reaching the heat radiation reflective layer 63 is reflected and propagates back towards the area where the heat exchange ring pipes 21 are located. The thermal insulation shell 62 restricts heat exchange between the area where the heat exchange component 2 is located and the surrounding environment. The heat radiation reflective layer 63 and the thermal insulation shell 62 work together to reduce the heat loss to the periphery of the support frame 61. The support frame 61 also provides a fixed position for the vibration damping guide component 7 and bears the structural load generated by the thermal insulation shell 62 and the vibration damping guide component 7.

[0049] like Figure 4As shown, the vibration damping and guiding assembly 7 is correspondingly arranged with the central clamping plate 332, including two limiting plates 71, buffer members 72, guide slots 73, toothed guide plates 74, and multiple guide teeth 741. The two limiting plates 71 are fixedly installed on the supporting frame 61, and are respectively arranged opposite each other on both sides of the central clamping plate 332. Buffer members 72 are fixedly installed on the surfaces of the two limiting plates 71 facing the central clamping plate 332. When the central clamping plate 332 undergoes lateral displacement, the buffer members 72 are located between the central clamping plate 332 and the corresponding limiting plates 71. Multiple guide slots 73 are provided on the central clamping plate 332, and the multiple guide slots 73 are arranged at intervals along the vertical direction. Each of the guide slots 73 has two opposing sidewalls, and the distance between the two sidewalls gradually increases along the direction of the corresponding guide rail 32 from the bellows body 1 toward the support frame 61. The guide slots 73 thus form a slot-shaped structure with a smaller width at the end toward the bellows body 1 and a larger width at the end toward the support frame 61.

[0050] A toothed guide plate 74 is fixedly installed between the two limiting plates 71. The toothed guide plate 74 has multiple guide teeth 741, which extend into multiple guide slots 73 respectively. When the central locking plate 332 moves along the guide rail 32 with the linkage plate 34, the multiple guide slots 73 move relative to the multiple guide teeth 741, and the multiple guide teeth 741 remain within the corresponding guide slots 73. The guide teeth 741 and the guide slots 73 together restrict the swing of the central locking plate 332 in the direction intersecting the extension direction of the guide rail 32. The two limiting plates 71 further restrict the lateral swing of the central locking plate 332, and the two buffer members 72 provide a buffering effect when the central locking plate 332 experiences lateral vibration. The central clamping plate 332 is thus simultaneously guided by the central guide rail 322, the two limiting plates 71, and the toothed guide plate 74, and the central clamping plate 332 still maintains normal adjustment movement along the central guide rail 322.

[0051] like Figure 9As shown, the waste heat recovery assembly 8 includes an economizer 81, a steam drum 82, and an evaporator 83. The outlet pipe 24 of the heat exchange assembly 2 is connected to the inlet of the economizer 81. Water preheated by the multiple layers of heat exchange ring pipes 21 enters the economizer 81 through the outlet pipe 24. The outlet of the economizer 81 is connected to the inlet of the steam drum 82. Water further heated by the economizer 81 enters the steam drum 82. The circulating water outlet of the steam drum 82 is connected to the inlet of the evaporator 83, and the steam-water outlet of the evaporator 83 is connected to the steam-water return outlet of the steam drum 82. The steam drum 82 and the evaporator 83 thus form a circulating water circuit. The heat exchange assembly 2 is located before the economizer 81 in the water-steam system. It mainly utilizes the heat lost from the outside of the wind box body 1 to increase the water temperature before entering the economizer 81. The heated water continues to be used for sintering waste heat recovery water supply to increase the waste heat recovery water supply temperature. When a sintering machine is provided with multiple air box bodies 1 along the material running direction, each air box body 1 is provided with a corresponding heat exchange component 2, a support and adjustment component 3, an adjustment transmission component 4 and a synchronous drive component 5, and the heat exchange component 2 corresponding to each air box body 1 forms an independent heat exchange flow path. When the heat exchange components 2 corresponding to multiple wind box bodies 1 adopt a series water supply structure, water enters the heat exchange component 2 arranged at the first end of the water flow direction. The outlet pipe 24 of the heat exchange component 2 located upstream of the water flow is connected to the inlet pipe 23 of the adjacent heat exchange component 2 located downstream of the water flow. The water flows sequentially through the heat exchange components 2 corresponding to multiple wind box bodies 1, and absorbs the heat transferred outward by the corresponding wind box body 1 in each heat exchange component 2. The outlet pipe 24 of the heat exchange component 2 located at the end of the water flow direction is connected to the inlet end of the economizer 81, so that the water supply passes sequentially through the heat exchange area of ​​the outer wall of multiple wind box bodies 1, and the heat recovered from the outer wall of multiple wind box bodies 1 is concentrated and sent to the subsequent waste heat recovery water vapor system. The heat exchange components 2 corresponding to multiple wind box bodies 1 can also form a series or parallel water supply structure according to the on-site water circuit arrangement, so that the waste heat recovery range of the outer wall of the wind box can be expanded from a single wind box to multiple high-temperature wind boxes, and the heat recovered from multiple wind box bodies 1 can be connected to the same waste heat recovery water circuit.

[0052] In another waterway layout, such as Figure 10 As shown, the heat exchange components 2 corresponding to the multiple air box bodies 1 adopt a parallel water supply structure. The inlet pipe 23 of each heat exchange component 2 is connected to the main water supply pipe 26, and the outlet pipe 24 of each heat exchange component 2 is connected to the main water collection pipe 27. Water is supplied to the multiple heat exchange components 2 through the main water supply pipe 26. The water in each branch absorbs the heat transferred outward by the corresponding air box body 1. After heat exchange, the water in each branch enters the main water collection pipe 27 through the corresponding outlet pipe 24, and is then sent to the economizer 81 by the main water collection pipe 27.

[0053] In this embodiment, during assembly, based on the installation height of each layer of heat exchanger ring tube 21, the corresponding mounting ring frame 31 is first set according to the installation height of the heat exchanger ring tube 21. The first guide rail 321, the middle guide rail 322, and the second guide rail 323 are installed on each mounting plate 311. The first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 are slidably connected to the corresponding guide rail 32. Before the closed heat exchanger ring tube 21 forms a closed structure, the first end clamping plate 331, the middle clamping plate 332, and the second end clamping plate 333 are respectively sleeved on the support positions of the corresponding heat exchanger tube segments 211. The corresponding tubes pass through three tube support holes 334. After the first end plate 331, the middle plate 332, and the second end plate 333 are installed in their corresponding positions, the three plates 33 are fixedly connected by the linkage plate 34. The four heat exchange tube segments 211 are then connected sequentially by the four arc-shaped connecting pipe segments 212 to form a single layer of closed heat exchange loop 21. After the installation of each layer of closed heat exchange loop 21 is completed, adjacent layers of heat exchange loop 21 are connected by the corresponding tee connectors 25 and the interlayer connecting pipes 22. The inlet pipe 23 is connected to the heat exchange loop 21 located at the lower end of the arrangement, and the outlet pipe 24 is connected to the heat exchange loop 21 located at the upper end of the arrangement. Each bearing seat 44 is fixedly mounted on the corresponding arc-shaped transition plate 312. Four edge-shaped rotating rods 41 are sequentially inserted through the corresponding bearing seats 44. Each drive gear 42 is fixedly mounted on the corresponding edge-shaped rotating rod 41 according to the position of each layer of heat exchange annular tube 21. Each rack 43 is fixedly mounted on the corresponding linkage plate 34, and each drive gear 42 meshes with the corresponding rack 43. The upper ends of the four edge-shaped rotating rods 41 are connected to four synchronous shafts 522 via four universal drive shafts 521. Four synchronous sprockets 523 are fixedly mounted on the four synchronous shafts 522. The closed transmission chain 524 forms a closed transmission relationship with the four synchronous sprockets 523. The support frame 61 is disposed around the heat exchange assembly 2. The insulation shell plate 62 is fixedly mounted on the support frame 61. The heat radiation reflective layer 63 is disposed on the surface of the insulation shell plate 62 facing the heat exchange annular tube 21. The two limiting plates 71 and the toothed guide plate 74 are fixedly installed on the support frame 61, and the multiple guide teeth 741 extend into the corresponding guide slots 73 respectively. The two buffer members 72 are respectively disposed between the corresponding limiting plates 71 and the central clamping plate 332.After the above installation is completed, each heat exchange tube section 211 is supported by the corresponding three clamping plates 33, each linkage plate 34 receives the driving force of the drive gear 42 through the corresponding rack 43, the four edge rotating rods 41 drive the adjustment structure corresponding to the four inclined outer walls 11 respectively, and the four edge rotating rods 41 jointly receive the power transmitted by the synchronous drive assembly 5.

[0054] During sintering machine operation, the high-temperature flue gas inside the main body 1 of the air box transfers heat to the four inclined outer walls 11, and the four inclined outer walls 11 release heat to the outside. The multi-layer heat exchange ring pipes 21 arranged around the inclined outer walls 11 absorb this heat. Water enters the lower heat exchange ring pipe 21 from the inlet pipe 23, and flows within the heat exchange pipe section 211, the tortuous compensation pipe section 213, and the arc-shaped connecting pipe section 212. The heat exchange ring pipe 21 absorbs the heat transferred from the inclined outer walls 11 and transfers the heat to the water inside the pipe. The water flows upward layer by layer through the interlayer connecting pipe 22. After passing through the multi-layer heat exchange ring pipes 21, the water is discharged from the outlet pipe 24. The outlet pipe 24 sends the preheated water into the economizer 81, and then the water enters the steam drum 82 from the economizer 81. The steam drum 82 and the evaporator 83 form a subsequent circulating water path. When the heat exchange distance between the heat exchange tube section 211 and the inclined outer wall 11 needs to be changed on site, the rotary drive 51 outputs rotational power, driving one of the synchronous shafts 522 to rotate. The synchronous sprocket 523 connected to the synchronous shaft 522 drives the closed transmission chain 524 to run, and the closed transmission chain 524 drives the other three synchronous sprockets 523, so the four synchronous shafts 522 rotate synchronously. The four synchronous shafts 522 drive the four edge rotating rods 41 to rotate through the four universal drive shafts 521, and the multiple drive gears 42 on each edge rotating rod 41 rotate synchronously. Each drive gear 42 drives the rack 43 meshing with it to move along the corresponding guide rail 32, the rack 43 drives the linkage plate 34 to move, and the linkage plate 34 synchronously drives the first end plate 331, the middle plate 332 and the second end plate 333 to move. The three clamping plates 33 collectively drive the corresponding heat exchange tube segments 211 to move along the normal direction of the corresponding inclined outer wall 11, thereby changing the distance between the heat exchange tube segments 211 on all four sides and the four inclined outer walls 11. Each drive gear 42 on the same edge rotating rod 41 has a corresponding pitch circle diameter. When the edge rotating rod 41 rotates through the same angle, each drive gear 42 drives the corresponding rack 43 to produce a linear displacement corresponding to its respective pitch circle radius. The heat exchange annular tubes 21 in each layer thereby obtain the corresponding normal adjustment amount. When each heat exchange tube segment 211 moves along the normal direction of the corresponding inclined outer wall 11, the outer dimensions of the closed heat exchange ring tube 21 in the same layer change accordingly. Each tortuous compensation tube segment 213 expands or contracts with the change of the outer dimensions. At the same time, the corresponding heat exchange tube segment 211 moves axially relative to the tube body support hole 334. The axial sliding of the tortuous compensation tube segment 213 and the tube body support hole 334 together adapt to the size change of the closed heat exchange ring tube 21.When two adjacent layers of heat exchange ring tubes 21 obtain the corresponding adjustment amount, the relative position between the two layers of heat exchange ring tubes 21 changes accordingly. The compensating connecting pipe section 221 adapts to the relative displacement through the shape change of its own tortuous pipe body. The interlayer connecting pipe 22 maintains the pipeline connection between the two adjacent layers of heat exchange ring tubes 21 during the adjustment process. After the rotating drive 51 stops, each heat exchange tube section 211 remains in the adjusted installation position, and the heat exchange ring tube 21 continues to absorb the heat transferred outward by the inclined outer wall 11 in the adjusted position. When the rotating drive 51 runs in the reverse direction, the synchronous transmission mechanism 52 drives the four edge rotating rods 41 to rotate in the opposite direction, and each drive gear 42 drives the corresponding rack 43 to move in the opposite direction. Each layer of heat exchange tube section 211 moves in the opposite direction along the corresponding guide rail 32, thereby completing the reverse adjustment.

[0055] The beneficial effects of the aforementioned waste heat recovery device for the sintering machine are as follows: First, by setting multiple layers of closed heat exchange loops 21 around the four inclined outer walls 11 of the main body 1 of the wind box, the heat transferred outward from the main body 1 of the wind box can be absorbed by the heat exchange loops 21 and used for preheating waste heat recovery water supply, thereby increasing the utilization path for heat dissipation from the outer wall of the sintering machine wind box; each layer of heat exchange loops 21 can move along the normal direction of the corresponding inclined outer wall 11, and by changing the heat exchange distance between the heat exchange tube section 211 and the inclined outer wall 11, different height positions can be adjusted. The heat exchange conditions are designed to adapt the position of the heat exchange loop 21 to the actual thermal state of different height areas of the main body 1 of the wind box; the tortuous compensation pipe sections 213 set in each heat exchange pipe section 211 extend the flow path of water in the pipe within the limited arrangement space, and increase the length and outer surface area of ​​the pipe body participating in heat exchange. At the same time, they can adapt to the changes in the outer dimension caused by the adjustment of the distance of the closed heat exchange loop 21 by unfolding and retracting, so that the heat exchange enhancement structure can also undertake the function of pipeline deformation compensation; in addition, multiple drive teeth on the same edge rotating rod 41 Wheel 42 drives heat exchange ring tubes 21 at different heights to adjust the pitch, and the pitch circle diameter relationship of the drive gear 42 forms the corresponding interlayer pitch adjustment amount, so that the multi-layer heat exchange ring tubes 21 can form a heat exchange spacing corresponding to the height position in one drive action. The four edge rotating rods 41 correspond to the four inclined outer walls 11 respectively, and receive the power of the rotating drive component 51 through the synchronous drive assembly 5, so that the heat exchange tube sections 211 on the four sides keep moving in a coordinated manner; the tortuous compensation tube section 213, the tube body support hole 334 and the compensation connecting pipe Section 221 adapts to changes in the position of the pipes within and between layers, ensuring the continuity of the multi-layer heat exchange flow path during the spacing adjustment process; the reflective insulation component 6 reduces the heat loss from the heat exchange area to the outside, and the vibration damping guide component 7 provides auxiliary limiting and buffering for the middle support position of the heat exchange pipe section 211; the water preheated by the heat exchange component 2 continues to enter the waste heat recovery water vapor system formed by the economizer 81, the steam drum 82 and the evaporator 83, thereby realizing the recovery and utilization of heat dissipation from the outer wall of the wind box, while also taking into account the adjustment of heat exchange conditions in different height areas.

[0056] It should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A waste heat recovery device for lifting sintering machines, characterized in that, include: The bellows body has four inclined outer walls connected sequentially along the circumference, and an edge is formed between two adjacent inclined outer walls; The heat exchange assembly includes multiple layers of closed heat exchange loops spaced apart along the height of the main body of the air box. Each layer of heat exchange loops surrounds the main body of the air box and includes four heat exchange tube segments extending along the four inclined outer walls and an arc-shaped connecting tube segment connecting two adjacent heat exchange tube segments. Each heat exchange tube segment is provided with a tortuous compensation tube segment, which is formed by continuous bending of the corresponding heat exchange tube segment and extends in a reciprocating tortuous manner along the extension direction of the heat exchange tube segment. Adjacent layers of heat exchange loops are connected by interlayer connecting tubes, and the multiple layers of heat exchange loops together form a heat exchange flow path. The inlet pipe and outlet pipe are respectively connected to the two ends of the heat exchange flow path. The support adjustment assembly includes multiple mounting rings spaced apart along the height direction of the air box body on the outside of the air box body and corresponding to the multiple layers of heat exchange ring tubes. Each mounting ring has four mounting plates corresponding to the four inclined outer walls. Multiple guide rails are fixedly mounted on each mounting plate. The multiple guide rails are spaced apart along the extension direction of the corresponding heat exchange tube segment. Each guide rail extends along the normal direction of the corresponding inclined outer wall. Each guide rail is slidably mounted with a clamping plate that supports the corresponding heat exchange tube segment. Multiple clamping plates on the same mounting plate are fixedly connected by a linkage plate. The adjustable transmission assembly includes four edge-rotating rods respectively arranged along the extension direction of the four edges. The four edge-rotating rods are rotatably mounted on multiple mounting rings and correspond one-to-one with the four inclined outer walls. Each edge-rotating rod has multiple drive gears fixedly installed at intervals along its axial direction, corresponding to each layer of heat exchange ring tubes. Each linkage plate has a rack arranged along the extension direction of the corresponding guide rail, and each drive gear meshes with the corresponding rack. The multiple drive gears on each edge-rotating rod include a first drive gear and a second drive gear corresponding to two layers of heat exchange ring tubes respectively. The pitch circle diameter of the first drive gear is larger than that of the second drive gear. The synchronous drive assembly includes a rotary drive component and a synchronous transmission mechanism, wherein the rotary drive component is connected to the four edge rotating rods respectively through the synchronous transmission mechanism.

2. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, The heat exchange ring tubes in multiple layers are arranged vertically in sequence. The inlet pipe is connected to the heat exchange ring tube located at the lower end of the arrangement, and the outlet pipe is connected to the heat exchange ring tube located at the upper end of the arrangement. The two ends of the interlayer connecting pipe are connected to the heat exchange ring tubes of the two adjacent layers through tee connectors. The interlayer connecting pipe is provided with a compensating connecting pipe section formed by continuous bending of its pipe body.

3. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, The tortuous compensation pipe section is located in a plane parallel to the corresponding inclined outer wall and forms multiple arc-shaped bends along its pipeline direction, with the bending directions of two adjacent arc-shaped bends being opposite.

4. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, Each mounting plate has multiple guide rails, including a first guide rail, a middle guide rail, and a second guide rail arranged sequentially along the extension direction of the corresponding heat exchange tube segment. A first end plate, a middle plate, and a second end plate are slidably mounted on the first guide rail, the middle guide rail, and the second guide rail, respectively. The first end plate and the second end plate support the tube body of the heat exchange tube segment located on both sides of the tortuous compensation tube segment, respectively. The middle plate supports the middle tube body of the tortuous compensation tube segment. The first end plate, the middle plate, and the second end plate are fixedly connected by the linkage plate. The first end plate, the middle plate, and the second end plate are respectively provided with tube body support holes for the corresponding tube body to pass through. The tube body support holes and the tube body passing through them slide in a sliding fit along the axial direction of the tube body.

5. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, Along the bellows body from bottom to top, the pitch circle diameters of the multiple drive gears on the same edge rotating rod increase sequentially.

6. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, Each of the mounting rings further includes an arc-shaped transition plate that is fixedly connected to two adjacent mounting plates. Each of the arc-shaped transition plates, arranged along the extension direction of each edge, is fixedly mounted with a bearing seat. The corresponding edge rotating rod is rotatably inserted through each of the bearing seats arranged along the extension direction of the edge.

7. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, The synchronous transmission mechanism includes four universal drive shafts, four synchronous shafts, four synchronous sprockets, and a closed transmission chain. The four universal drive shafts are respectively connected to the upper ends of the four edge rotating rods and the four synchronous shafts. The axes of the four synchronous shafts are parallel to each other. The four synchronous sprockets are respectively fixedly installed on the four synchronous shafts and located in the same horizontal transmission plane. The closed transmission chain is sequentially engaged with the four synchronous sprockets. The rotary drive component is connected to one of the four synchronous shafts.

8. The waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, It also includes a reflective insulation component, which includes a support frame fixedly installed on the outside of the main body of the wind box and surrounding the periphery of the multi-layer heat exchange ring pipe, an insulation shell plate fixedly installed on the support frame, and a heat radiation reflective layer disposed on the surface of the insulation shell plate facing the heat exchange ring pipe; the support frame is fixedly installed on the outside of the main body of the wind box.

9. A waste heat recovery device for lifting a sintering machine according to claim 8, characterized in that, It also includes a vibration damping and guiding assembly. Multiple clamping plates on the same mounting plate include a central clamping plate supporting the middle section of the tortuous compensation pipe body. The vibration damping and guiding assembly includes two limiting plates fixedly installed on the support frame and located on both sides of the central clamping plate. Buffer components are fixedly installed on the surfaces of the two limiting plates facing the central clamping plate. Multiple guide slots are spaced vertically on the central clamping plate. The distance between the opposite side walls of each guide slot gradually increases along the direction corresponding to the guide rail from the wind box body towards the support frame. A toothed guide plate is fixedly installed between the two limiting plates. The toothed guide plate has multiple guide teeth that extend into the multiple guide slots.

10. A waste heat recovery device for lifting a sintering machine according to claim 1, characterized in that, It also includes a waste heat recovery component, which includes an economizer, a steam drum, and an evaporator; the water outlet pipe is connected to the water inlet of the economizer, the water outlet of the economizer is connected to the water inlet of the steam drum, the circulating water outlet of the steam drum is connected to the water inlet of the evaporator, and the steam-water outlet of the evaporator is connected to the steam-water return port of the steam drum.

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