A heat exchange furnace utilizing waste heat from exhaust gas and a waste heat reversing structure

Abstract

The present invention relates to the field of heat exchange technology, specifically a heat exchange furnace and a waste heat reversing structure that utilizes waste heat from exhaust gas, including a heat exchange furnace body, wherein a plurality of heat exchange plates are arranged in the heat exchange furnace body; a serpentine cavity is arranged in the heat exchange plate, and both ends of the serpentine cavity are located on the same side of the heat exchange plate; an exhaust pipe is arranged in the heat exchange furnace body, and the exhaust pipe has two groups of flow cavities formed along its length; a sealing switching component connects the exhaust pipe and the heat exchange plate, and the sealing switching component can make the flow direction of the exhaust gas in the serpentine cavity opposite when the heat exchange plate is deflected; two groups of conduits are provided and connected to the interior of the heat exchange furnace body, and the fluid can rotate in different directions when entering the heat exchange furnace body through the conduit; a conversion component is connected to the two groups of conduits, and the conversion component can control the fluid to enter the heat exchange furnace body through the two groups of conduits respectively, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, in particular to a heat exchange furnace utilizing waste heat of exhaust gas and a waste heat reversing structure. Background Art

[0002] The effective utilization of high-temperature industrial waste gas offers numerous benefits. In terms of energy utilization, waste heat recovery for power generation and heating can significantly reduce a company's energy consumption, reduce dependence on external energy sources, and lower production costs. Furthermore, purification and treatment of waste gas ensures compliance with emission standards, reducing harmful pollutants. Furthermore, recycling and reusing valuable components in waste gas improves resource utilization, aligning with the concept of a circular economy, creating additional economic benefits for the company and enhancing its market competitiveness.

[0003] Heat exchange furnaces are primarily used in waste heat recovery processes. High-temperature exhaust gas enters the heat exchanger plates of the heat exchanger furnace, where it exchanges heat with the cold heat carrier inside the furnace. This cold heat carrier then collects the waste heat for reuse. However, industrial waste gas contains a certain amount of dust. This dust enters the heat exchanger plates along with the high-temperature exhaust gas and gradually adheres to the inner walls of the plates, reducing the heat exchange efficiency between the high-temperature exhaust gas and the plates. Furthermore, the diameter of the channels within the plates through which the high-temperature gas flows decreases. Under constant pumping pressure, the high-temperature exhaust gas's velocity within the plates increases, further exacerbating the decline in heat exchange efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a heat exchange furnace and a waste heat reversing structure that utilize the waste heat of exhaust gas to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A heat exchange furnace utilizing waste heat of exhaust gas, a heat exchange furnace body, wherein a plurality of heat exchange plates are arranged in the heat exchange furnace body;

[0007] a serpentine cavity, disposed in the heat exchange plate, with two ends of the serpentine cavity located on the same side of the heat exchange plate;

[0008] An exhaust pipe is arranged in the heat exchange furnace body, and the exhaust pipe is formed with two groups of flow cavities along its length direction;

[0009] a sealing switching assembly connected to the exhaust pipe and the heat exchange plate, wherein the sealing switching assembly can reverse the flow direction of the exhaust gas in the serpentine cavity when the heat exchange plate is deflected;

[0010] There are two sets of conduits, which are connected to the interior of the heat exchange furnace body, and the fluid can rotate in different directions when entering the heat exchange furnace body through the conduits;

[0011] The conversion component is connected to the two groups of conduits, and the conversion component can control the fluid to enter the heat exchange furnace body through the two groups of conduits respectively.

[0012] As a further solution of the present invention: the sealing switching assembly includes multiple groups of connecting sleeves coaxially fixedly connected to the exhaust pipe and conducting pipes passing through the connecting sleeves and respectively connected to the two groups of the flow chambers. The connecting sleeves are rotatably connected to the heat exchange plate, and the conducting pipes are connected to the serpentine chamber through a sealing sliding kit.

[0013] As a further solution of the present invention: the sealing sliding kit includes an annular part fixedly connected to the conducting pipe and a collar fixedly connected to the heat exchange plate, the collar is sealingly and slidingly connected to the annular groove formed on the annular part, when one end of the serpentine cavity is coaxial and connected with one group of the conducting pipes, the other end thereof is coaxial and connected with the other group of the conducting pipes.

[0014] As a further embodiment of the present invention, the conversion assembly includes a communicating vessel communicating with the two groups of conduits and a blocking ring disposed inside the communicating vessel, wherein the blocking ring is in sealing and sliding engagement with the inner wall of the communicating vessel and a conducting hole is provided on the blocking ring;

[0015] The conversion assembly further comprises a rotation kit connected to the blocking ring, and the rotation kit is used to drive the blocking ring to rotate so that the conducting holes can be connected to the two groups of conduits respectively.

[0016] As a further solution of the present invention: the rotating kit includes a connecting shaft coaxially fixedly connected to the sealing ring, the connecting shaft is provided with a sleeve that can slide along its length direction, the inner wall of the sleeve is provided with a convex shaft, and the convex shaft is slidably connected to a spiral groove provided along the length direction of the connecting shaft.

[0017] As a further solution of the present invention: it also includes a scraper slidably connected to the heat exchange plate and a driven ring slidably arranged through the heat exchange furnace body, an annular groove is formed in the driven ring, and the scraper can slide in the annular groove.

[0018] As a further solution of the present invention: a waste heat reversing structure, applied to the heat exchange furnace utilizing waste heat of exhaust gas, comprises:

[0019] A lifting member, which is arranged on the heat exchange furnace body and is fixedly connected to the sleeve member;

[0020] A lifting and deflecting assembly is connected to the lifting member and the rotating shaft of the heat exchange plate, and the lifting and deflecting assembly can synchronously drive the heat exchange plate and the sleeve member to move;

[0021] The lifting assembly is connected to the lifting member and the driven ring. When the lifting member moves, the lifting assembly can drive the scraper to perform a reciprocating motion along the width direction of the heat exchange plate.

[0022] As a further solution of the present invention: the lifting member includes a driven plate slidably mounted on the heat exchange furnace body, and the driven plate is provided with an electric telescopic rod connected to the heat exchange furnace body;

[0023] The lifting and deflecting assembly includes an extension rod fixedly connected to the rotating shaft of the heat exchange plate. A groove wheel is rotatably mounted on one end of the extension rod away from the rotating shaft of the heat exchange plate. The groove wheel can roll in a transverse groove formed on the driven plate.

[0024] As a further solution of the present invention: the jacking assembly includes a pulling frame connected to the driven ring, and a driving wheel is rotatably mounted on the pulling frame;

[0025] The extension assembly further includes a side plate fixedly connected to the driven plate, wherein the side plate is provided with a V-shaped groove, and the driving wheel can roll in the V-shaped groove.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The heat exchange plates and the ducts that cooperate with them can, firstly, change the flow direction of the high-temperature exhaust gas in the heat exchange plates, thereby ensuring continuous heat exchange. At the same time, the reverse airflow can be used to remove dust adhering to the inner wall of the serpentine cavity. Secondly, the turbulence of the cold heat carrier in the heat exchange furnace body can be increased, so that the cold heat carrier can fully exchange heat with the heat exchange plates.

[0028] The scraper provided can scrape off the structural materials formed on the outside of the heat exchange plate, which, together with the removal of dust adhering to the inner wall of the serpentine cavity, ensures the heat exchange effect between the high-temperature exhaust gas and the heat exchange plate, and between the heat exchange plate and the cold heat carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0030] Figure 2 This is a schematic diagram of the internal structure of a heat exchange furnace body in one embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0031] Figure 3 This is a structural diagram of the sealing switching assembly and heat exchange plates in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0032] Figure 4This is a schematic diagram of the structure of the exhaust pipe in an embodiment of a heat exchange furnace that utilizes the waste heat of exhaust gas.

[0033] Figure 5 This is an exploded view of the structure of the sealing switching assembly in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0034] Figure 6 This is a cross-sectional view of the structure of the heat exchange plate in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0035] Figure 7 This is a structural schematic diagram of the lifting component in an embodiment of the waste heat reversing structure.

[0036] Figure 8 This is a structural schematic diagram of the top extension component in an embodiment of the waste heat reversing structure.

[0037] Figure 9 This is a schematic structural diagram of a scraper and a driven ring in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0038] Figure 10 This is a schematic structural diagram of a conversion component in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0039] In the figure: 1. heat exchange furnace body; 2. exhaust pipe; 201. circulation cavity; 3. connecting sleeve; 4. conducting pipe; 5. annular member; 6. sleeve; 7. heat exchange plate; 701. serpentine cavity; 8. extension rod; 9. groove pulley; 10. electric telescopic rod; 11. driven plate; 1101. horizontal groove; 12. pulling frame; 13. driven ring; 1301. annular groove; 14. scraper; 15. driving wheel; 16. side plate; 1601. "V"-shaped groove; 1602. vertical groove; 17. connecting frame; 18. fitting; 1801. convex shaft; 19. connecting shaft; 1901. spiral groove; 20. sealing ring; 2001. conducting hole; 21. communicating vessel; 22. conduit. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] See also Figures 1 to 10 In an embodiment of the present invention, a heat exchange furnace utilizing waste heat of exhaust gas is provided, comprising a heat exchange furnace body 1, wherein a plurality of heat exchange plates 7 are provided in the heat exchange furnace body 1. Specifically, the heat exchange furnace body 1 is a hollow structure, wherein a cold heat carrier can enter the hollow structure for circulation, and high-temperature exhaust gas can enter the heat exchange plates 7, thereby heating the heat exchange plates 7. Heat exchange can then be performed between the cold heat carrier and the heat exchange plates 7, thereby increasing the temperature of the cold heat carrier and realizing heat recovery.

[0043] It also includes a serpentine cavity 701, an exhaust pipe 2, a sealing switching component, a conduit 22 and a conversion component.

[0044] The serpentine cavity 701 is provided in the heat exchange plate 7, with both ends of the serpentine cavity 701 located on the same side of the heat exchange plate 7. Specifically, the distances between the two ends of the serpentine cavity 701 and the rotation axis of the heat exchange plate 7 are equal.

[0045] The exhaust pipe 2 is arranged in the heat exchange furnace body 1. The exhaust pipe 2 has two groups of flow cavities 201 formed along its length. In detail, when the high-temperature exhaust gas enters the heat exchange plate 7 through one group of flow cavities 201, the exhaust gas can enter the other group of flow cavities 201 after passing through the serpentine cavity 701, thereby realizing the circulation of the exhaust gas and realizing heat exchange between the exhaust gas and the cold heat medium.

[0046] See also Figures 1 to 5 The sealing switching component is connected to the exhaust pipe 2 and the heat exchange plate 7. The sealing switching component can reverse the flow direction of the exhaust gas in the serpentine cavity 701 when the heat exchange plate 7 is deflected;

[0047] The sealing switching assembly includes multiple groups of connecting sleeves 3 coaxially fixedly connected to the exhaust pipe 2 and a conducting pipe 4 passing through the connecting sleeve 3 and respectively connected to the two groups of the flow chambers 201. The connecting sleeve 3 is rotatably connected to the heat exchange plate 7, and the conducting pipe 4 is connected to the serpentine chamber 701 through a sealing sliding kit.

[0048] For ease of understanding, the two flow cavities 201 are named the air inlet cavity and the air outlet cavity respectively. In the initial state, the heat exchange plate 7 is tilted. At this time, one end of the serpentine cavity 701 on the heat exchange plate 7 is connected to the air inlet cavity through one set of conducting pipes 4, while the other end of the serpentine cavity 701 is connected to the air outlet cavity through the other set of conducting pipes 4.

[0049] When high-temperature exhaust gas enters the air inlet cavity, it will enter the serpentine cavity 701 through one group of conducting pipes 4, and then enter the air outlet cavity through another group of conducting pipes 4. In this process, the high-temperature exhaust gas can effectively exchange heat with the heat exchange plate 7, so that the temperature of the heat exchange plate 7 gradually rises. As the temperature of the heat exchange plate 7 rises, it can exchange heat with the cold heat carrier in the heat exchange furnace body 1, thereby realizing effective heat recovery. This structural design not only improves the heat exchange efficiency, but also makes the heat exchange process more stable, which can better meet the heat exchange requirements under different working conditions, effectively reduce energy waste, and improve energy utilization efficiency.

[0050] During operation, as the high-temperature exhaust gas continues to circulate, the dust carried in the exhaust gas will gradually adhere to the inner wall of the serpentine cavity 701, which will cause the inner wall diameter of the serpentine cavity 701 to gradually narrow. When the high-temperature exhaust gas passes through the serpentine cavity 701, the flow rate of the exhaust gas will be accelerated accordingly due to the narrowing of the inner wall diameter. However, this change will have an adverse effect on the heat exchange effect. First, the dust adhered to the inner wall of the serpentine cavity 701 will form an insulating layer, reducing the heat conduction efficiency between the high-temperature exhaust gas and the heat exchange plate 7. Secondly, the acceleration of the high-temperature exhaust gas flow rate will shorten the contact time between the high-temperature exhaust gas and the heat exchange plate 7, thereby further reducing the heat exchange effect.

[0051] In order to solve this problem, in this embodiment, after a period of directional flow, the heat exchange plate 7 can perform a deflection action. At this time, the end of the serpentine cavity 701 that was originally connected to the air inlet cavity will be switched to be connected to the air outlet cavity, and the end that was originally connected to the air outlet cavity will be switched to be connected to the air inlet cavity. In this way, after the heat exchange plate 7 performs the deflection action, the flow direction of the high-temperature exhaust gas in the serpentine cavity 701 changes, forming a reverse airflow. Through the action of the reverse airflow, part of the dust adhering to the inner wall of the serpentine cavity 701 can be blown away, thereby reducing the accumulation thickness of the dust in the serpentine cavity 701. At the same time, as the dust decreases, the circulation speed of the high-temperature exhaust gas in the serpentine cavity 701 will also decrease accordingly. This not only ensures that the heat exchange can continue, but also effectively improves the heat exchange effect between the high-temperature exhaust gas and the heat exchange plate 7, ensuring the efficient operation of the entire system.

[0052] Through further observation and analysis, we found that when dust continues to accumulate in the serpentine cavity 701, its morphology exhibits a specific pattern, and the dust gradually forms an inclined conical structure or an annular distribution. The characteristic of this structure is that on the air inlet side, the slope of the dust accumulation is relatively small. Based on the above characteristics, when the high-temperature gas moves in the opposite direction, due to the shape and slope characteristics of the dust accumulation, the airflow can effectively act on the accumulated dust. Specifically, the reverse airflow will cause the accumulated dust to be subjected to greater wind resistance. This phenomenon provides a theoretical basis for the high-temperature gas to achieve the removal of dust accumulation through reverse movement. In other words, with the help of this relationship between dust morphology and reverse airflow, we can better achieve the removal of dust in the serpentine cavity 701, thereby maintaining the efficient operation of the system and ensuring the continuous progress of the heat exchange process and the stability of the heat exchange effect.

[0053] The sealing sliding kit includes an annular part 5 fixedly connected to the conducting pipe 4 and a collar 6 fixedly connected to the heat exchange plate 7. The collar 6 is sealingly and slidingly connected to the annular groove formed on the annular part 5. When one end of the serpentine cavity 701 is coaxial and conductive with one group of the conducting pipes 4, the other end thereof is coaxial and conductive with the other group of the conducting pipes 4.

[0054] By means of the provided annular member 5 and the sleeve ring 6, when the heat exchange plate 7 is rotated, the flow direction of the high-temperature gas can be switched accurately and effectively. At the same time, this structural design can also play a good sealing role, preventing the high-temperature gas from escaping from the gap between the heat exchange plate 7 and the heat exchange furnace body 1, and avoiding the high-temperature gas from directly contacting the cold heat carrier in the heat exchange furnace body 1, thereby effectively preventing the cold heat carrier from being contaminated by the high-temperature gas, ensuring the stable operation of the entire heat exchange system and the reliability of the heat exchange effect.

[0055] See also Figure 1~Figure 2 、 Figure 10 There are two groups of conduits 22 that are connected to the interior of the heat exchange furnace body 1. When the fluid enters the heat exchange furnace body 1 through the conduits 22, it can rotate in different directions. Specifically, the two groups of conduits 22 are arranged in parallel, and the two groups of conduits 22 are tangent to the inner wall of the heat exchange furnace body 1. This arrangement ensures that when the cold heat carrier enters the heat exchange furnace body 1, it can make a circular motion under the guidance of the inner wall of the heat exchange furnace body 1;

[0056] The conversion assembly is connected to the two groups of conduits 22, and the conversion assembly can control the fluid to enter the heat exchange furnace body 1 through the two groups of conduits 22 respectively;

[0057] During the flow of the cold heat carrier, its flow direction is from the upper part to the lower part of the heat exchange furnace body 1. Since the heat exchange plates 7 are in an inclined state, the heat exchange plates 7 can have a drainage effect on the cold heat carrier when it flows, prompting the cold heat carrier to move forward in a spiral motion. This spiral motion greatly enhances the contact effect between the cold heat carrier and the heat exchange plates 7, thereby effectively improving the heat exchange efficiency between the heat exchange plates 7 and the cold heat carrier.

[0058] For ease of understanding, we define the rotation direction of the cold heat carrier in the initial state under the guidance of the heat exchange plate 7 as the positive direction. When the cold heat carrier enters the heat exchange furnace body 1 through one of the groups of pipes 22, it will generate a negative rotation under the guidance of the heat exchange plate 7, accompanied by an upward movement trend. This process has two advantages: on the one hand, it can significantly increase the turbulence of the cold heat carrier entering the heat exchange furnace body 1; on the other hand, as the cold heat carrier continues to flow, the cold heat carrier moving upward and rotating in the negative direction will follow the downward movement, and the lower cold heat carrier, under the action of the lower heat exchange plate 7, presents a counter-rotating state with the upper cold heat carrier. This counter-rotation causes a relative stirring effect at the junction of the upper and lower parts of the cold heat carrier, further improving the overall turbulence of the cold heat carrier in the heat exchange furnace body 1, thereby significantly improving the heat exchange effect between the cold heat carrier and the heat exchange plate 7 to a certain extent.

[0059] The conversion assembly includes a communicating vessel 21 communicating with the two sets of conduits 22 and a blocking ring 20 disposed inside the communicating vessel 21. The blocking ring 20 is in sealing and sliding contact with the inner wall of the communicating vessel 21, and a conducting hole 2001 is provided on the blocking ring 20.

[0060] The conversion assembly also includes a rotating kit connected to the sealing ring 20, and the rotating kit is used to drive the sealing ring 20 to rotate so that the guide hole 2001 can be connected to the two groups of the conduits 22 respectively. The rotating kit includes a connecting shaft 19 coaxially fixedly connected to the sealing ring 20, and the connecting shaft 19 is provided with a sleeve 18 that can slide along its length direction. The inner wall of the sleeve 18 is provided with a convex shaft 1801, and the convex shaft 1801 is slidably connected to a spiral groove 1901 provided along the length direction of the connecting shaft 19.

[0061] During use, the cold heat medium pumping device is connected to the communicating vessel 21, and the cold heat medium can smoothly enter the communicating vessel 21. Subsequently, the cold heat medium enters one of the groups of conduits 22 through the conducting hole 2001 and then flows into the heat exchange furnace body 1. When it is necessary to change the movement direction of the cold heat medium entering the heat exchange furnace body 1, the control sleeve 18 is operated. Specifically, the convex shaft 1801 and the spiral groove 1901 cooperate to drive the sealing ring 20 to deflect. In this way, the conducting hole 2001 can be connected to the other group of conduits 22, thereby realizing the change of the cold heat medium transportation direction. This design ensures that the cold heat medium can rotate in different rotation directions when entering the heat exchange furnace body 1, further optimizing the heat exchange process and improving the heat exchange efficiency and effect.

[0062] See also Figure 2 、 Figures 8 and 9 , and also includes a scraper 14 slidably connected to the heat exchange plate 7 and a driven ring 13 slidably arranged through the heat exchange furnace body 1, an annular groove 1301 is formed in the driven ring 13, and the scraper 14 can slide in the annular groove 1301.

[0063] During use, by pulling the driven ring 13 to move, the scraper 14 can be driven to move along the width direction of the heat exchange plate 7. This design enables the scraper 14 to effectively scrape off the scaling substances formed on the surface of the heat exchange plate 7 due to the high temperature of the cold heat carrier. In this way, the scaling substances can be prevented from accumulating on the surface of the heat exchange plate 7, thereby preventing the scaling from affecting the heat exchange effect between the heat exchange plate 7 and the cold heat carrier, and ensuring the efficient operation of the heat exchange process.

[0064] Furthermore, in the present application, in order to change the flow direction of the high-temperature exhaust gas in the heat exchange plate 7, the heat exchange plate 7 is set to a rotatable structure. When the heat exchange plate 7 rotates, it will drive the scraper 14 to rotate synchronously. At this time, the scraper 14 can move smoothly in the annular groove 1301, thereby always maintaining a stable connection with the driven ring 13. This ensures that when the driven ring 13 is pulled to move, the scraper 14 can stably and effectively perform the scraping operation on the scaling substances, further ensuring the cleanliness of the surface of the heat exchange plate 7, which is conducive to maintaining a good heat exchange effect.

[0065] Furthermore, the generation of scaling substances is mainly due to the fact that the cold heat carrier contains more or less metal ions such as calcium and magnesium, as well as ions such as carbonate and sulfate. Under high temperature conditions, these ions will combine with each other to form insoluble salts such as calcium carbonate and magnesium hydroxide, which are deposited on the surface of the heat exchange plate 7 to form scaling.

[0066] See also Figures 7 to 9As an embodiment of the present invention, a waste heat reversing structure is also proposed, which is applied to the heat exchange furnace utilizing waste heat of exhaust gas, comprising:

[0067] The lifting member is provided on the heat exchange furnace body 1 and fixedly connected to the sleeve member 18, and includes a driven plate 11 slidably mounted on the heat exchange furnace body 1, the driven plate 11 being provided with an electric telescopic rod 10 connected to the heat exchange furnace body 1, and the driven plate 11 being further provided with a connecting frame 17 connected to the sleeve member 18;

[0068] The lifting and deflection assembly is connected to the lifting member and the rotating shaft of the heat exchange plate 7. The lifting and deflection assembly can synchronously drive the heat exchange plate 7 and the sleeve 18 to move. The lifting and deflection assembly includes an extension rod 8 fixedly connected to the rotating shaft of the heat exchange plate 7. The extension rod 8 is rotatably installed with a groove wheel 9 at one end away from the rotating shaft of the heat exchange plate 7. The groove wheel 9 can roll in the horizontal groove 1101 formed on the driven plate 11.

[0069] During actual use, by controlling the movement of the electric telescopic rod 10, the driven plate 11 can be driven to move. This movement allows the relative height between the driven plate 11 and the heat exchange furnace body 1 to be adjusted, and with the mutual cooperation of the groove wheel 9 and the transverse groove 1101, the heat exchange plate 7 will be deflected, thereby realizing the high-temperature exhaust gas in the heat exchange plate 7 to flow in different directions.

[0070] When the driven plate 11 moves, it will drive the sleeve 18 to move through the connecting frame 17, so that the sealing ring 20 can rotate. In this way, the direction in which the cold heat carrier enters the heat exchange furnace body 1 also changes accordingly. The deflection of the heat exchange plate 7 and the direction in which the cold heat carrier enters the heat exchange furnace body 1 can be automatically matched. On the one hand, the high-temperature exhaust gas can flow in different directions in the heat exchange plate 7, effectively reducing the degree of dust adhesion; on the other hand, the turbulence of the cold heat carrier in the heat exchange furnace body 1 can be maintained, thereby ensuring a good heat exchange effect.

[0071] The extending assembly is connected to the lifting member and the driven ring 13. When the lifting member is in motion, the extending assembly can drive the scraper 14 to perform a reciprocating motion along the width direction of the heat exchange plate 7. The extending assembly includes a pulling frame 12 connected to the driven ring 13, and a driving wheel 15 is rotatably mounted on the pulling frame 12.

[0072] The extension assembly also includes a side plate 16 fixedly connected to the driven plate 11, and a "V"-shaped groove 1601 is provided on the side plate 16. The driving wheel 15 can roll in the "V"-shaped groove 1601. Furthermore, vertical grooves 1602 are also provided at both ends of the "V"-shaped groove 1601.

[0073] When the driven plate 11 is raised and lowered to drive the heat exchange plate 7 to perform a deflection action, the driving wheel 15 can roll in the vertical groove 1602 and the "V"-shaped groove 1601. When the driving wheel 15 is in the vertical groove 1602, the position of the pulling frame 12 can be realized, so that in this state, the scraper 14 can remain relatively stationary with respect to the heat exchange plate 7. When the driving wheel 15 rolls in the "V"-shaped groove 1601, the driving wheel 15 can drive the driven ring 13 to move through the pulling frame 12, so that the scraper 14 performs a reciprocating action relative to the width direction of the heat exchange plate 7 to scrape off the scaling positions on the heat exchange plate 7.

[0074] Through the above arrangement, the scraper 14 can simultaneously scrape off the scaling substances on the heat exchange plate 7 during the deflection of the heat exchange plate 7, thus achieving a synergistic effect between the two and improving the integration of the device to a certain extent.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0076] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A heat exchange furnace utilizing waste heat from exhaust gas, comprising: A heat exchange furnace body (1), wherein a plurality of groups of heat exchange plates (7) are arranged in the heat exchange furnace body (1); It is characterized by further comprising: A serpentine cavity (701) is provided in the heat exchange plate (7), with both ends of the serpentine cavity (701) located on the same side of the heat exchange plate (7); An exhaust pipe (2) is arranged in the heat exchange furnace body (1), and the exhaust pipe (2) is formed with two groups of flow cavities (201) along its length direction; a sealing switching assembly connected to the exhaust pipe (2) and the heat exchange plate (7), wherein the sealing switching assembly is capable of reversing the flow direction of the exhaust gas in the serpentine cavity (701) when the heat exchange plate (7) is deflected; Two sets of conduits (22) are provided and communicate with the interior of the heat exchange furnace body (1), and when the fluid enters the heat exchange furnace body (1) through the conduits (22), it can rotate in different directions; A conversion assembly is connected to the two groups of conduits (22), and the conversion assembly can control the fluid to enter the heat exchange furnace body (1) through the two groups of conduits (22); The sealing switching assembly comprises a plurality of communicating sleeves (3) coaxially fixedly connected to the exhaust pipe (2) and a conducting pipe (4) penetrating the communicating sleeves (3) and respectively communicating with the two groups of the flow chambers (201); the communicating sleeves (3) are rotatably connected to the heat exchange plate (7); and the conducting pipe (4) is communicated with the serpentine chamber (701) via a sealing sliding sleeve. The conversion assembly comprises a communicating vessel (21) communicating with the two groups of conduits (22) and a blocking ring (20) disposed inside the communicating vessel (21), wherein the blocking ring (20) is in sealing and sliding contact with the inner wall of the communicating vessel (21), and a conducting hole (2001) is provided on the blocking ring (20); The conversion assembly further comprises a rotation kit connected to the blocking ring (20), the rotation kit being used to drive the blocking ring (20) to rotate so that the through hole (2001) can be connected to the two groups of conduits (22) respectively; It also includes a scraper (14) slidably connected to the heat exchange plate (7) and a driven ring (13) slidably arranged to penetrate the heat exchange furnace body (1), wherein an annular groove (1301) is formed in the driven ring (13), and the scraper (14) is capable of sliding in the annular groove (1301).

2. The heat exchange furnace utilizing waste heat of exhaust gas according to claim 1, characterized in that: The sealing sliding kit comprises an annular member (5) fixedly connected to the conducting tube (4) and a collar (6) fixedly connected to the heat exchange plate (7); the collar (6) is sealingly and slidingly connected to an annular groove formed on the annular member (5); when one end of the serpentine cavity (701) is coaxial and in communication with one group of the conducting tubes (4), the other end thereof is coaxial and in communication with the other group of the conducting tubes (4).

3. The heat exchange furnace utilizing waste heat of exhaust gas according to claim 1, characterized in that: The rotating sleeve comprises a connecting shaft (19) coaxially fixedly connected to the sealing ring (20), the connecting shaft (19) being provided with a sleeve (18) capable of sliding along its length direction, the inner wall of the sleeve (18) being provided with a convex shaft (1801), the convex shaft (1801) being slidably connected to a spiral groove (1901) provided along the length direction of the connecting shaft (19).

4. A waste heat reversing structure, characterized in that: The heat exchange furnace utilizing waste heat from exhaust gas as claimed in claim 3 comprises: A lifting member, arranged on the heat exchange furnace body (1) and fixedly connected to the sleeve member (18); A lifting and deflecting assembly connected to the lifting member and the rotating shaft of the heat exchange plate (7), wherein the lifting and deflecting assembly can synchronously drive the heat exchange plate (7) and the sleeve member (18) to move; A lifting assembly connected to the lifting member and the driven ring (13), wherein when the lifting member is in motion, the lifting assembly can drive the scraper (14) to perform a reciprocating motion along the width direction of the heat exchange plate (7); The lifting member comprises a driven plate (11) slidably mounted on the heat exchange furnace body (1), and an electric telescopic rod (10) connected to the heat exchange furnace body (1) is provided on the driven plate (11); The lifting and deflecting assembly comprises an extension rod (8) fixedly connected to the rotating shaft of the heat exchange plate (7), and a groove wheel (9) is rotatably mounted on one end of the extension rod (8) away from the rotating shaft of the heat exchange plate (7), and the groove wheel (9) is capable of rolling in a transverse groove (1101) formed on the driven plate (11); The jacking assembly comprises a pulling frame (12) connected to the driven ring (13), and a driving wheel (15) is rotatably mounted on the pulling frame (12); The extension assembly further comprises a side plate (16) fixedly connected to the driven plate (11), wherein a V-shaped groove (1601) is provided on the side plate (16), and the driving wheel (15) is capable of rolling in the V-shaped groove (1601).

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