Heat exchange furnace utilizing waste gas waste heat and waste heat reversing structure

Abstract

The invention relates to the technical field of heat exchange, in particular to a heat exchange furnace utilizing waste gas waste heat and a waste heat reversing structure, the heat exchange furnace comprises a heat exchange furnace body, and multiple groups of heat exchange plates are arranged in the heat exchange furnace body; the snakelike cavity is formed in the heat exchange plate, and the two ends of the snakelike cavity are located on the same side of the heat exchange plate; the waste gas pipe is arranged in the heat exchange furnace body, and two sets of circulation cavities are formed in the waste gas pipe in the length direction of the waste gas pipe; the sealing switching assembly is connected with the waste gas pipe and the heat exchange plate, and when the heat exchange plate deflects, the sealing switching assembly enables the circulation directions of waste gas in the snake-shaped cavity to be opposite; the two sets of guide pipes communicate with the interior of the heat exchange furnace body, and when fluid enters the heat exchange furnace body through the guide pipes, the fluid can rotate in different directions; and the conversion assembly is connected with the two guide pipes and can control the fluid to enter the heat exchange furnace body through the two guide pipes, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The 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 use of industrial high-temperature waste gas brings many benefits. In terms of energy utilization, waste heat recovery for power generation and heating can significantly reduce the energy consumption of enterprises, reduce dependence on external energy, and reduce production costs. In terms of environmental protection, waste gas is purified and discharged to meet emission standards, reducing the pollution of harmful substances. At the same time, the valuable components in waste gas are recycled and reused to improve resource utilization, which is in line with the concept of circular economy, creating additional economic benefits for enterprises and enhancing market competitiveness.

[0003] In the waste heat recovery process, heat exchange furnaces are mainly used. High-temperature exhaust gas enters the heat exchange plate of the heat exchange furnace, exchanges heat with the cold heat carrier in the furnace, and collects waste heat for reuse with the help of the cold heat carrier. However, there is a certain proportion of dust in industrial waste gas. This dust enters the heat exchange plate with the high-temperature exhaust gas and gradually adheres to the inner wall of the heat exchange plate, resulting in a decrease in the heat exchange effect between the high-temperature exhaust gas and the heat exchange plate. At the same time, the diameter of the channel for the flow of high-temperature gas in the heat exchange plate is reduced. Under the condition of constant pumping pressure, the flow velocity of high-temperature exhaust gas in the heat exchange plate increases, further exacerbating the decrease in heat exchange effect. 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-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A heat exchange furnace utilizing waste heat of exhaust gas, a heat exchange furnace body, wherein a plurality of groups of heat exchange plates are arranged in the heat exchange furnace body; A serpentine cavity is arranged in the heat exchange plate, and two 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 is formed with two groups of flow cavities along its length direction; A sealing switching component is connected to the exhaust pipe and the heat exchange plate, and the sealing switching component can make the exhaust gas flow direction in the serpentine cavity reverse when the heat exchange plate is deflected; There are two groups of conduits, which are connected to the interior of the heat exchange furnace body, and when the fluid enters the heat exchange furnace body through the conduits, it can rotate in different directions; 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.

[0006] As a further solution of the present invention: the sealing switching assembly includes a plurality of connecting sleeves coaxially fixedly connected to the exhaust pipe and a conducting pipe penetrating the connecting sleeve and respectively connected to the two groups of the flow chambers; the connecting sleeve is rotatably connected to the heat exchange plate, and the conducting pipe is connected to the serpentine chamber through a sealing sliding kit.

[0007] As a further solution of the present invention: the sealing sliding kit includes an annular part fixedly connected to the conducting pipe and a sleeve ring fixedly connected to the heat exchange plate, the sleeve ring is sealingly and slidingly connected to an 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.

[0008] As a further solution of the present invention: the conversion assembly includes a communicating vessel connected to the two groups of the conduits and a blocking ring arranged inside the communicating vessel, the blocking ring is sealingly and slidingly fitted with the inner wall of the communicating vessel, and the blocking ring is provided with a conducting hole; The conversion assembly also includes a rotating sleeve connected to the blocking ring, and the rotating sleeve is used to drive the blocking ring to rotate so that the conductive holes can be connected to the two groups of catheters respectively.

[0009] 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.

[0010] 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.

[0011] 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: A lifting member, which is arranged on the heat exchange furnace body and is fixedly connected to the sleeve member; 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; The lifting component is connected to the lifting member and the driven ring. When the lifting member moves, the lifting component can drive the scraper to perform a reciprocating motion along the width direction of the heat exchange plate.

[0012] As a further solution of the present invention: the lifting member comprises 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; The lifting and deflecting assembly comprises an extension rod fixedly connected to the rotating shaft of the heat exchange plate, and a groove wheel is rotatably mounted on one end of the extension rod away from the rotating shaft of the heat exchange plate, and the groove wheel can roll in a transverse groove formed on the driven plate.

[0013] 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; The extension assembly also includes a side plate fixedly connected to the driven plate, and a "V"-shaped groove is provided on the side plate, and the driving wheel can roll in the "V"-shaped groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Through the heat exchange plate and the duct coordinated therewith, firstly, the flow direction of the high-temperature exhaust gas in the heat exchange plate can be changed, so that the heat exchange can be continued, and the dust adhering to the inner wall of the serpentine cavity can be removed by the reverse airflow. 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 plate. The scraper provided can scrape off the structural material 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

[0015] Figure 1 The present invention is a schematic structural diagram of an embodiment of a heat exchange furnace utilizing waste heat of exhaust gas.

[0016] Figure 2 This is a schematic diagram of the internal structure of a heat exchange furnace body in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0017] Figure 3 This is a schematic diagram of the structure of the sealing switching assembly and the heat exchange plate in an embodiment of a heat exchange furnace utilizing waste heat from exhaust gas.

[0018] Figure 4 This is a schematic diagram of the structure of an exhaust pipe in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0019] Figure 5 This is an exploded view of the structure of the sealing switching assembly in an embodiment of a heat exchange furnace utilizing waste heat from exhaust gas.

[0020] Figure 6A structural cross-sectional view of a heat exchange plate in an embodiment of a heat exchange furnace utilizing waste heat from exhaust gas.

[0021] Figure 7 This is a schematic diagram of the structure of a lifting component in an embodiment of a waste heat reversing structure.

[0022] Figure 8 This is a schematic structural diagram of a top extension component in an embodiment of a waste heat reversing structure.

[0023] Fig. 9 This is a schematic diagram of the structure of a scraper and a driven ring in an embodiment of a heat exchange furnace utilizing waste heat from exhaust gas.

[0024] Fig.10 This is a schematic diagram of the structure of a conversion component in an embodiment of a heat exchange furnace that utilizes waste heat from exhaust gas.

[0025] 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 ring; 7. heat exchange plate; 701. serpentine cavity; 8. extension rod; 9. groove wheel; 10. electric telescopic rod; 11. driven plate; 1101. transverse 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

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0027] 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 a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0028] See also Figure 1 to Figure 10In an embodiment of the present invention, a heat exchange furnace utilizing waste heat of exhaust gas is provided, including a heat exchange furnace body 1, wherein a plurality of heat exchange plates 7 are arranged in the heat exchange furnace body 1. Specifically, the heat exchange furnace body 1 is a cavity structure, and a cold heat carrier can enter the cavity structure for circulation, and high-temperature exhaust gas can enter the heat exchange plates 7 to heat the heat exchange plates 7, and heat exchange can 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.

[0029] It also includes a serpentine cavity 701, an exhaust pipe 2, a sealing switching component, a conduit 22 and a conversion component.

[0030] The serpentine cavity 701 is disposed in the heat exchange plate 7, and both ends of the serpentine cavity 701 are 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; The exhaust pipe 2 is arranged in the heat exchange furnace body 1, and two groups of flow cavities 201 are formed on the exhaust pipe 2 along its length direction. 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 the heat exchange between the exhaust gas and the cold heat carrier.

[0031] See also Figure 1~Figure 5 The sealing switching component is connected to the exhaust pipe 2 and the heat exchange plate 7, and the sealing switching component can make the exhaust gas flow direction in the serpentine cavity 701 opposite when the heat exchange plate 7 is deflected; The sealing switching assembly includes a plurality of connecting sleeves 3 coaxially fixedly connected to the exhaust pipe 2 and a conducting pipe 4 penetrating the connecting sleeves 3 and respectively connected to the two groups of the flow chambers 201. The connecting sleeves 3 are 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.

[0032] For ease of understanding, the two flow chambers 201 are named as the air inlet chamber and the air outlet chamber. In the initial state, the heat exchange plate 7 is in an inclined state. At this time, one end of the serpentine chamber 701 on the heat exchange plate 7 is connected to the air inlet chamber through one set of conducting pipes 4, and the other end of the serpentine chamber 701 is connected to the air outlet chamber through another set of conducting pipes 4. When the 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 increases, 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.

[0033] 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 increase 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.

[0034] 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 be reduced accordingly, which 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.

[0035] In further observation and analysis, we found that when the dust continues to accumulate in the serpentine cavity 701, its shape presents a specific regularity, and the dust gradually forms an inclined conical structure or annular distribution. The characteristic of this structure is that on the air inlet side, the slope of the dust accumulation is relatively small, and 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 cleaning of dust accumulation through reverse movement. In other words, with the help of the relationship between this dust shape and reverse airflow, we can better achieve the cleaning of the 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.

[0036] The sealing sliding kit includes an annular member 5 fixedly connected to the conducting tube 4 and a sleeve ring 6 fixedly connected to the heat exchange plate 7. The sleeve ring 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 connected with one group of the conducting tubes 4, the other end thereof is coaxial and connected with the other group of the conducting tubes 4.

[0037] By means of the 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.

[0038] See also Figure 1~Figure 2 , Fig.10 The conduits 22 are provided with two groups and are connected with the inside 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 respectively. This arrangement can ensure 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; 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; 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 plate 7 is in an inclined state, the heat exchange plate 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 plate 7, thereby effectively improving the heat exchange efficiency between the heat exchange plate 7 and the cold heat carrier.

[0039] For ease of understanding, we define the rotation direction of the cold heat carrier under the guidance of the heat exchange plate 7 in the initial state as the positive direction. When the cold heat carrier enters the heat exchange furnace body 1 through one of the groups of conduits 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 dual 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, with the continuous flow of the cold heat carrier, 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 reverse rotation state with the upper cold heat carrier. This reverse 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.

[0040] The conversion assembly includes a communicating vessel 21 communicating with the two groups of conduits 22 and a blocking ring 20 disposed inside the communicating vessel 21. The blocking ring 20 is sealingly and slidably fitted with the inner wall of the communicating vessel 21, and a conducting hole 2001 is disposed on the blocking ring 20. 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 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.

[0041] During use, the cold heat carrier pumping device is connected to the communicating vessel 21, and the cold heat carrier can smoothly enter the communicating vessel 21. Subsequently, the cold heat carrier 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 carrier 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 carrier conveying direction. This design ensures that the cold heat carrier 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.

[0042] See also Figure 2 , Figure 8~Figure 9 , and 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 can slide in the annular groove 1301 .

[0043] 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 by the cold heat carrier due to high temperature. 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, thereby ensuring the efficient heat exchange process.

[0044] 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 as 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, so as to always maintain 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.

[0045] 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 and 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.

[0046] See also Figure 7~Figure 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: The lifting member is arranged 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 is provided with an electric telescopic rod 10 connected to the heat exchange furnace body 1, and the driven plate 11 is also provided with a connecting frame 17 connected to the sleeve member 18; The lifting and deflecting assembly is connected to the lifting member and the rotating shaft of the heat exchange plate 7. The lifting and deflecting assembly can synchronously drive the heat exchange plate 7 and the sleeve member 18 to move. The lifting and deflecting assembly includes an extension rod 8 fixedly connected to the rotating shaft of the heat exchange plate 7. The extension rod 8 has a groove wheel 9 rotatably installed at one end away from the rotating shaft of the heat exchange plate 7. The groove wheel 9 can roll in the transverse groove 1101 formed on the driven plate 11.

[0047] In 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 cooperation of the groove wheel 9 and the transverse groove 1101, the heat exchange plate 7 will be deflected, thereby achieving high-temperature exhaust gas in different flow directions in the heat exchange plate 7.

[0048] 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 will also change 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 the heat exchange plate 7 in different directions, 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.

[0049] The extension assembly is connected to the lifting member and the driven ring 13. When the lifting member moves, the extension assembly can drive the scraper 14 to perform a reciprocating motion along the width direction of the heat exchange plate 7. The extension 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. 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.

[0050] 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 still 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.

[0051] Through the above arrangement, during the deflection of the heat exchange plate 7, the scraper 14 can simultaneously scrape off the scaling substances on the heat exchange plate 7, that is, the synergistic effect of the two is achieved, and the integration of the device is improved to a certain extent.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat exchange furnace utilizing waste heat of 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 arranged in the heat exchange plate (7), with two ends of the serpentine cavity (701) being located on the same side of the heat exchange plate (7); An exhaust gas pipe (2) is arranged in the heat exchange furnace body (1), and the exhaust gas pipe (2) is formed with two groups of flow cavities (201) along its length direction; a sealing switching component connected to the exhaust pipe (2) and the heat exchange plate (7), wherein 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; Two groups of conduits (22) are provided and are in communication with 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; A conversion component is connected to the two groups of conduits (22), and the conversion component can control the fluid to enter the heat exchange furnace body (1) through the two groups of conduits (22).

2. A heat exchange furnace utilizing waste heat of exhaust gas according to claim 1, characterized in that: The sealing switching assembly comprises a plurality of groups of connecting sleeves (3) coaxially fixedly connected to the exhaust pipe (2) and a conducting pipe (4) penetrating the connecting sleeves (3) and respectively communicating with two groups of the flow chambers (201); the connecting 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 kit.

3. A heat exchange furnace utilizing waste heat of exhaust gas according to claim 2, 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 conduction with one group of the conducting tubes (4), the other end thereof is coaxial and in conduction with another group of the conducting tubes (4).

4. The heat exchange furnace utilizing waste heat of exhaust gas according to claim 1, characterized in that: The conversion assembly comprises a connecting vessel (21) connected to the two groups of conduits (22) and a blocking ring (20) arranged inside the connecting vessel (21), the blocking ring (20) being sealingly slidably fitted with the inner wall of the connecting vessel (21), and a conducting hole (2001) being arranged on the blocking ring (20); The conversion assembly further comprises a rotating set connected to the blocking ring (20), the rotating set 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.

5. The heat exchange furnace utilizing waste heat of exhaust gas according to claim 4, characterized in that: The rotating sleeve comprises a connecting shaft (19) coaxially fixedly connected to the sealing ring (20); the connecting shaft (19) is provided with a sleeve member (18) capable of sliding along its length direction; the inner wall of the sleeve member (18) is provided with a convex shaft (1801); the convex shaft (1801) is slidably connected to a spiral groove (1901) provided along the length direction of the connecting shaft (19).

6. The heat exchange furnace utilizing waste heat of exhaust gas according to claim 1, characterized in that: 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).

7. A waste heat reversing structure, characterized in that: The heat exchange furnace for utilizing waste heat of exhaust gas as claimed in claims 1 to 6 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), the lifting and deflecting assembly being capable of synchronously driving the heat exchange plate (7) and the sleeve member (18) to move; A lifting component is connected to the lifting member and the driven ring (13), and when the lifting member moves, the lifting component can drive the scraper (14) to perform a reciprocating motion along the width direction of the heat exchange plate (7).

8. A waste heat reversing structure according to claim 7, characterized in that: The lifting member comprises a driven plate (11) slidably mounted on the heat exchange furnace body (1), and the driven plate (11) is provided with an electric telescopic rod (10) connected to the heat exchange furnace body (1); 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).

9. A waste heat reversing structure according to claim 8, characterized in that: The extension 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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