Heat exchanger capable of improving heat conversion rate

Abstract

This invention relates to the field of heat exchange technology, and proposes a heat exchanger with a reasonable structural design that can reduce heat energy waste and improve heat conversion efficiency. The heat exchanger includes a furnace shell and a furnace shell outer jacket. The furnace shell is sequentially provided with a waste gas outlet, a heat exchange chamber, a dispersion chamber, and a combustion port. A waste gas inlet is provided on the heat exchange chamber. A flow-blocking tube plate is respectively provided on the left and right ports of the heat exchange chamber, and a heat exchange tube is arranged between the two flow-blocking tube plates. A baffle structure is provided inside the heat exchange chamber. The furnace shell outer jacket is tightly fitted onto the furnace shell. A support block is provided between the furnace shell and the furnace shell outer jacket, forming a gas transmission channel. A vent hole is opened in the cavity at the rear end of the heat exchange chamber. A connection port is provided on the furnace shell outer jacket. A distribution plate is provided on the combustion port, forming a combustion gap between the distribution plate and the connection port. An explosion-venting structure is provided on the furnace shell outer jacket at the combustion gap position. A dispersion structure is provided inside the dispersion chamber. A movable structure is provided at the lower ends of the furnace shell and the furnace shell outer jacket.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and in particular to a heat exchanger that can improve heat conversion efficiency. Background Technology

[0002] In waste gas treatment, we typically burn the waste gas to convert it into harmless gases before releasing it into the atmosphere. However, the combustion gases contain a significant amount of heat. Directly releasing this hot air into the atmosphere would be a waste of thermal energy, and the combustion process itself requires a large amount of heat. Waste heat recovery devices can effectively recover the heat from the combustion gases and transfer it back to the waste gas to be burned. This direct heat transfer is simpler, more convenient, and less costly than converting heat into other forms of energy.

[0003] The combustion gases are transported through heat exchange pipes. To improve heat transfer efficiency, these pipes are designed as U-shaped, S-shaped, or spiral pipes, increasing the contact area between the exhaust gas and the pipes by extending their length. However, since the exhaust gas moves in the same direction as the heat exchange pipes, the exhaust gas can only move along the pipes without resistance. This hinders uniform contact between the exhaust gas and the heat exchange pipes, resulting in the exhaust gas closer to the pipes absorbing more heat and the exhaust gas farther away absorbing less heat, leading to unsatisfactory heat transfer efficiency.

[0004] To increase the heat transfer efficiency of exhaust gas, this paper proposes a heat exchanger that increases heat conversion efficiency by changing the movement path of exhaust gas. Summary of the Invention

[0005] Therefore, in view of the above problems, the present invention proposes a heat exchanger with a reasonable structural design that can reduce heat energy waste and improve heat conversion rate.

[0006] To solve the above-mentioned technical problems, the solution adopted by the present invention is as follows: a heat exchanger that can improve the heat conversion rate, comprising a furnace shell and a furnace shell outer jacket disposed outside the furnace shell. The furnace shell is provided with, from left to right, an exhaust gas outlet for discharging the exhaust gas after combustion, a heat exchange chamber for exchanging the heat of the exhaust gas after combustion, a dispersion chamber for evenly dispersing the exhaust gas after combustion to the inner wall of the furnace shell so that the furnace wall can absorb the heat of the exhaust gas, and a combustion port for the exhaust gas and combustion flame to enter. An exhaust gas inlet for the exhaust gas to be burned is provided on the front side of the outer wall of the left end of the heat exchange chamber. The left and right ports of the heat exchange chamber are respectively equipped with flow-blocking tube plates for restricting the diffusion of exhaust gas to both ends. Mounting holes are evenly spaced on the two flow-blocking tube plates. Between the two flow-blocking tube plates are several heat exchange tubes that transport the combusted exhaust gas from the dispersion chamber through the heat exchange chamber to the exhaust gas outlet for heat exchange. The two ends of each heat exchange tube are tightly inserted into the mounting holes. A flow gap is formed between the heat exchange tubes to allow exhaust gas to flow while restricting its passage, ensuring the exhaust gas adheres to the heat exchange tubes and passes through evenly, thus improving heat exchange efficiency. The cavity is equipped with a baffle structure to guide the exhaust gas to be burned along the direction perpendicular to the heat exchange tubes, increase the resistance during the exhaust gas movement, and prolong the contact time between the exhaust gas and the heat exchange tubes. The furnace shell outer sleeve is located at the rear end of the heat exchange cavity and is tightly fitted onto the furnace shell. Several support blocks are provided between the furnace shell and the furnace shell outer sleeve to maintain a fixed distance, forming a gas transmission channel between the furnace shell and the furnace shell outer sleeve. The cavity at the rear end of the heat exchange cavity has a vent hole for the exhaust gas in the heat exchange cavity to enter the gas transmission channel between the outer wall of the furnace shell and the furnace shell outer sleeve. The right end face of the furnace shell outer sleeve... The furnace is equipped with a connection port for connecting to an external burner. The combustion port is equipped with a distribution plate for concentrating the flame emitted by the burner and ensuring complete combustion of the exhaust gas. A combustion gap is formed between the distribution plate and the connection port. The upper end of the furnace shell, located at the combustion gap, is equipped with a pressure relief structure for automatically releasing pressure when the pressure inside the furnace shell and furnace shell is too high. The dispersion chamber is equipped with a dispersion structure for dispersing the concentrated and burned exhaust gas. The lower end of the furnace shell and furnace shell is equipped with multiple sets of movable structures at intervals to facilitate movement.

[0007] A further improvement is that the gas delivery channel is equipped with a guide structure to extend the exhaust gas travel path and fully absorb heat.

[0008] A further improvement is that the guiding structure is a spiral guide plate that is spirally wound and fixedly installed in the gas transmission channel.

[0009] A further improvement is that the spiral guide plate is divided into eight segments, with a spacing of 100-300mm between each segment, and the eight spiral guide plates are wrapped around the outer wall of the furnace liner.

[0010] A further improvement is that the heat exchange chamber is equipped with an expansion structure that adapts to deformation and recovery when the inlet pressure is too high to prevent the furnace shell from bursting.

[0011] A further improvement is that the expansion structure is a double-layer corrugated pipe, and the heat exchange cavity is divided into two sections between the exhaust gas inlet and the left end of the furnace shell. The double-layer corrugated pipe is disposed between the two sections of the heat exchange cavity, and the two ends of the double-layer corrugated pipe are respectively and tightly fixed on the heat exchange cavity.

[0012] A further improvement is that the baffle structure includes several semi-circular baffles spaced apart between the exhaust gas inlet and the right end of the heat exchange chamber. The arc-shaped side of the semi-circular baffle is vertically fixed on the upper or lower inner wall of the heat exchange chamber. The planar side surfaces of adjacent semi-circular baffles face each other. The semi-circular baffles are provided with through holes for the heat exchange tube to pass through vertically.

[0013] A further improvement is that the vent holes include upper vent holes arranged in a single row at the rear end of the upper cavity of the heat exchange chamber.

[0014] A further improvement is that the vent also includes a lower vent located on the right end of the inner wall below the heat exchange chamber. The diameter of the upper vent is smaller than that of the lower vent, and the side surface of the semi-circular baffle located at the rightmost end of the heat exchange chamber faces the front.

[0015] A further improvement is that the explosion venting structure includes a vertically arranged explosion venting channel, an inclined explosion vent at the upper end of the explosion venting channel, an end cap for closing the explosion vent, the upper side of the end cap being rotatably hinged to the explosion venting channel, the inclination angle of the end cap being 10-25°, and a handle for manually opening and closing the end cap being provided on the upper surface of the end cap.

[0016] A further improvement is made in that: the distribution plate has an opening in the middle for the inner ring flame to pass through directly, and the distribution plate has through holes on the periphery for the outer ring flame and exhaust gas to pass through. The distribution plate is cut and set between the through holes and the opening to form a guide hole for the flame and exhaust gas to pass through and a guide plate 1 for guiding and concentrating the flame and exhaust gas passing through the guide hole towards the middle. The outer side of the guide plate 1 is fixedly set on the outer side of the guide hole, and the inner side of the guide plate 1 is folded 40-50° towards the dispersion cavity.

[0017] A further improvement is that the folding angle of the guide plate is 45°.

[0018] A further improvement is that the guide hole and the guide plate are both isosceles trapezoids, with the shorter side of the isosceles trapezoid facing the center of the distribution plate.

[0019] A further improvement is made to the dispersion structure, which includes a first baffle ring and a second baffle ring arranged sequentially from right to left. A first baffle fan blade and a second baffle fan blade are respectively provided on the first and second baffle rings. The first and second baffle fan blades are fixedly mounted on the first and second baffle rings with their central portions protruding towards the distribution plate and their outer portions facing the heat exchange chamber. At least two first support plates and second support plates are respectively provided on the outer walls of the first and second baffle rings for fixing the baffle rings to the inner wall of the dispersion chamber. The first and second support plates are staggered and inclined. One end of the first support plate is fixedly mounted on the first baffle ring, and the other end is fixedly mounted on the inner wall of the dispersion chamber. One end of the second support plate is fixedly mounted on the second baffle ring, and the other end is fixedly mounted on the inner wall of the dispersion chamber. The inclination angle between the first and second support plates is 40-50°. The outer diameter of the first baffle fan blade is smaller than the outer diameter of the second baffle fan blade.

[0020] A further improvement is that the movable structure includes a support base, the upper end face of which has an arc-shaped groove that fits against the outer wall of the furnace liner or the outer wall of the furnace liner jacket, and the lower end of the support base is provided with a support shaft along the direction perpendicular to the central axis of the furnace liner, with rollers respectively provided at both ends of the support shaft.

[0021] A further improvement is that a heat-insulating protective cover is provided on the outer periphery of the furnace shell.

[0022] A further improvement is that thermal insulation cotton is filled around the connection port on the right end face of the furnace liner.

[0023] A further improvement is that the support block is a U-shaped support block, and the bottom surface of the U-shaped support block is in contact with the outer wall of the furnace liner.

[0024] A further improvement is that the furnace shell has an outlet cone with a diameter that gradually decreases from right to left at the left port of the heat exchange chamber. An air outlet pipe is provided at the left port of the outlet cone. The right end of the outlet cone is fixedly connected to the cavity of the heat exchange chamber, and the left end is fixedly connected to the air inlet end of the air inlet pipe.

[0025] A further improvement is that an air inlet pipe is fixedly installed on the front side of the outer wall of the left end of the heat exchange chamber, and the air outlet end of the air inlet pipe is connected to the inside of the heat exchange chamber.

[0026] A further improvement is made as follows: the furnace shell has a connecting cone with a diameter that gradually increases from right to left at the right port of the heat exchange cavity. The left port of the connecting cone is fixedly connected to the cavity of the heat exchange cavity, and the right port is fixedly connected to the cavity of the dispersion cavity. The furnace shell outer sleeve has a reduced diameter section that is adapted to the shape of the furnace shell at the position of the connecting cone. At least three guide plates are evenly distributed axially at the reduced diameter section on the inner wall of the furnace shell outer sleeve. The outer side of the guide plates is fixedly installed on the inner wall of the furnace shell outer sleeve.

[0027] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0028] 1. The heat exchange tubes used in this case are straight tubes. The heat exchange tubes are directly inserted into the cut-off tube sheet, which is easy to disassemble and install. Moreover, each heat exchange tube is independent, which facilitates independent replacement later.

[0029] 2. In this case, the semi-circular baffles installed along the vertical heat exchange tubes in the heat exchange chamber guide the exhaust gas, causing it to move along the direction of the vertical corrugated tubes. This ensures that the exhaust gas entering the heat exchange chamber can contact the heat exchange tubes evenly. The flow gap between the heat exchange tubes slows down the flow velocity of the exhaust gas and reduces the distance between the exhaust gas and the heat exchange tubes, allowing the exhaust gas to fully absorb heat and improve the heat conversion rate.

[0030] 3. In this case, the heat exchange chamber has vents in the upper and lower sections. The upper vents are arranged in a single row, while the lower vents are arranged in multiple rows. The diameter of the upper vents is smaller than that of the lower vents to force the exhaust gas after absorbing heat to overcome the rising characteristics of hot gas and contact the heat exchange tubes as much as possible to absorb more heat. At the same time, when the pressure in the heat exchange chamber is too high, the upper vents can increase the amount of exhaust gas entering the gas delivery channel to prevent the inner liner from bursting. The upper vents can also accelerate the movement speed of the exhaust gas, making the movement speed of the exhaust gas at the top and bottom different. The temperature of the exhaust gas passing through the upper vents is not as high as that of the exhaust gas passing through the lower vents. Under the spiral guidance of the spiral guide plate, the exhaust gas passing through the upper and lower vents can mix evenly and integrate the temperatures to facilitate stable combustion in the future.

[0031] 4. In this case, the spiral guide plate installed in the gas transmission channel is arranged around the outer wall of the furnace. The spiral guide plate is divided into eight sections, with each section spaced 180mm apart. The spacing is appropriate. Under normal gas pressure, the exhaust gas moves in a spiral motion along the spiral guide plate. When the gas pressure is too high, some of the gas pressure can pass directly through the gap between the spiral guide plates and move directly to the explosion vent, shortening the axial movement path and accelerating the flow of exhaust gas to prevent excessive pressure from damaging the furnace and the furnace outer casing.

[0032] 5. The connecting cone on the furnace shell and the corresponding reduction in diameter of the furnace shell in this case are beneficial in two ways: firstly, they can guide and expand the waste gas when it moves in the opposite direction, so that the waste gas can enter the heat exchange tube evenly; secondly, the gas transmission channel at the reduction in diameter can accelerate the waste gas, and the guide plate at the reduction in diameter can restrict the waste gas from rotating, which is beneficial to axially accelerating all the energy.

[0033] 6. In this case, the first and second fan blades installed in the dispersion chamber uniformly disperse the exhaust gas moving towards the heat exchange tube, thereby improving the output efficiency of the exhaust gas.

[0034] 7. The guide hole and guide plate 1 on the distribution plate in this case are conducive to guiding the flame and exhaust gas passing through the guide hole to the center of the guide plate 1, so as to facilitate full and uniform combustion. The guide plate 1 and the guide hole are in the shape of an isosceles trapezoid, and the short side faces the center of the distribution plate, which is conducive to further guiding the exhaust gas. Attached Figure Description

[0035] Figure 1 This is a front view of the internal structure of a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0036] Figure 2 This is a top view of the internal structure of a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0037] Figure 3 This is a top view schematic diagram of the vent structure in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0038] Figure 4 This is a schematic diagram of the throttling tube sheet in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the baffle plate structure in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0040] Figure 6 This is a schematic diagram of the dispersed structure in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0041] Figure 7 This is a schematic diagram of the distribution plate in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention.

[0042] Figure 8 This is a schematic diagram of the moving structure in a heat exchanger that can improve heat conversion rate according to an embodiment of the present invention. Detailed Implementation

[0043] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0044] refer to Figures 1 to 8 The present invention discloses a heat exchanger that can improve heat conversion rate, including a furnace shell 10 and a furnace shell outer sleeve 11 disposed outside the furnace shell 10. The outer sleeve 11 is covered with a heat insulation protective cover 12. The furnace shell 10 is provided with, from left to right, an exhaust gas outlet 13 for discharging exhaust gas after combustion, a heat exchange chamber 14 for exchanging heat from the exhaust gas after combustion, a dispersion chamber 15 for evenly dispersing the exhaust gas after combustion to the inner wall of the furnace shell 10 so that the furnace wall can absorb the heat from the exhaust gas, and a combustion port 16 for the exhaust gas and combustion flame to enter. The furnace shell 10 has an outlet cone 17 on the left port of the heat exchange chamber 14, with the diameter gradually decreasing from right to left. An exhaust pipe 18 is provided on the left port of the outlet cone 17. The right end of the outlet cone 17 is welded to or integrally fixedly connected to the cavity of the heat exchange chamber 14, and the left end is welded to or integrally fixedly connected to the air inlet end of the air inlet pipe 20. The exhaust end of the exhaust pipe 18 is the waste gas outlet 13.

[0045] An air inlet pipe 20 is welded and fixedly installed on the outer wall of the left end of the heat exchange chamber 14. The outlet end of the air inlet pipe 20 is connected to the interior of the heat exchange chamber 14, and the air inlet of the air inlet pipe 20 is the exhaust gas inlet 21 into which the exhaust gas to be burned enters. The left and right ports of the heat exchange chamber 14 are respectively provided with flow-blocking pipe plates 22 for restricting the diffusion of exhaust gas to both ends and isolating the exhaust gas outlet 13, the heat exchange chamber 14, and the dispersion chamber 15. Mounting holes 9 are evenly distributed on the two flow-blocking pipe plates 22. Between the two flow-blocking pipe plates 22, several heat exchange tubes 23 are arranged to transport the combusted exhaust gas from the dispersion chamber 15 through the heat exchange chamber 14 to the exhaust gas outlet 13 for heat exchange. The two ends of the heat exchange tubes 23 are respectively tightly inserted into the mounting holes. A flow gap is formed between the heat exchange tubes 23 to allow the exhaust gas to flow and restrict its passage, allowing the exhaust gas to pass evenly and adhere to the heat exchange tubes 23, thus improving heat exchange efficiency. The heat exchange chamber 14 is equipped with... A baffle structure is provided to guide the exhaust gas to be burned along the direction of the vertical heat exchange tube 23, increase the resistance of the exhaust gas movement process, and prolong the contact time between the exhaust gas and the heat exchange tube 23. The furnace shell outer sleeve 11 is located at the rear end of the heat exchange chamber 14 and is tightly fitted onto the furnace shell 10. Several support blocks 24 are provided between the furnace shell 10 and the furnace shell outer sleeve 11 to maintain a fixed distance. The support blocks 24 are U-shaped support blocks 25 that do not affect the flow of exhaust gas. The bottom surface of the U-shaped support block 25 is attached to the outer wall of the furnace shell 10. The bottom surface of the U-shaped support block 25 is welded to the outer wall of the furnace shell 10 or the two ends of the U-shaped support block 25 are welded and fixed to the inner wall of the furnace shell outer sleeve 11.

[0046] A gas transmission channel 26 is formed between the furnace shell 10 and the furnace shell outer sleeve 11. The cavity at the rear end of the heat exchange chamber 14 is provided with a vent hole for the exhaust gas in the heat exchange chamber 14 to enter the gas transmission channel 26 between the outer wall of the furnace shell 10 and the furnace shell outer sleeve 11. The vent hole includes an upper vent hole 19 that is uniformly arranged in a single row at the rear end of the upper cavity of the heat exchange chamber 14, and a lower vent hole 27 that is opened on the right port of the lower inner wall of the heat exchange chamber 14. The diameter of the upper vent 19 is smaller than that of the lower vent 27, so that the exhaust gas after absorbing heat can overcome the rising characteristics of hot gas and contact the heat exchange tube 23 as much as possible to absorb more heat. At the same time, when the pressure in the heat exchange chamber 14 is too high, the upper vent 19 can increase the amount of exhaust gas entering the gas delivery channel 26 to prevent the inner liner from bursting. The upper vent 19 can accelerate the movement speed of the exhaust gas, so that the movement speed of the exhaust gas at the top and bottom is different. The temperature of the exhaust gas passing through the upper vent 19 is not as high as the temperature of the exhaust gas passing through the lower vent 27. Under the spiral guidance of the spiral guide plate, the exhaust gas passing through the upper vent 19 and the exhaust gas passing through the lower vent 27 can mix evenly and integrate the temperature to facilitate subsequent stable combustion.

[0047] The furnace shell jacket 11 has a connection port 28 for connecting to an external burner on its right end face. Insulation cotton 29 is filled around the connection port 28 on the right end face of the furnace shell jacket 11, and the insulation cotton 29 is filled on the outer surface of the right end face. The combustion port 16 has a distribution plate 30 for concentrating the flame emitted by the burner and ensuring complete combustion of exhaust gas. The distribution plate 30 has an opening 31 in the center for the inner ring flame to pass through directly, and through holes 32 around its perimeter for the outer ring flame and exhaust gas to pass through. A guide hole 33 for the flame and exhaust gas to pass through and a guide plate 34 for guiding and concentrating the flame and exhaust gas passing through the guide hole 33 towards the center are cut and formed on the distribution plate 30 between the through hole 32 and the opening 31. The guide plate 34 is fixedly mounted on the outside of the guide hole 33, and its inner side is folded towards the dispersion cavity 15 at a 40-50° angle, preferably 45°. The guide hole 33 and guide plate 34 are in the shape of isosceles trapezoids, with the short side of the isosceles trapezoid facing the middle of the distribution plate 30. A combustion gap 35 is formed between the distribution plate 30 and the connection port 28. The upper end of the furnace shell jacket 11 located at the combustion gap 35 is provided with a pressure relief structure for automatically releasing pressure when the pressure inside the furnace shell 10 and furnace shell jacket 11 is too high. A dispersion structure is provided in the dispersion chamber 15 for dispersing the concentrated combustion exhaust gas. Multiple sets of movable structures are spaced apart at the lower ends of the furnace shell 10 and furnace shell jacket 11 for easy movement.

[0048] The gas conveying channel 26 is equipped with a guide structure to extend the travel path of the exhaust gas and facilitate heat absorption. The guide structure is a spiral guide plate (not shown in the figure) spirally wound and fixed within the gas conveying channel 26. One side of the spiral guide plate is welded and fixed to the inner wall of the furnace shell 11 or to the outer wall of the furnace shell 10. To reduce the pressure of the exhaust gas within the gas conveying channel 26, the spiral guide plate is divided into eight segments, with a spacing of 100-300 mm, preferably 180 mm, between each segment. The eight segments of the spiral guide plate are wound around the outer wall of the furnace shell 10. This spacing between the spiral guide plates increases the path of the exhaust gas along the axial direction of the furnace shell 10. When the pressure of the exhaust gas within the gas conveying channel 26 is too high, the exhaust gas can directly shorten its travel path through the axial movement path, accelerating the flow of the exhaust gas and preventing damage to the furnace shell 10 and the furnace shell 11 due to excessive pressure.

[0049] The heat exchange chamber 14 is equipped with an expansion structure that adapts to deformation and recovery when the inlet pressure is too high, preventing the furnace shell 10 from bursting. The expansion structure is a double-layered corrugated pipe 37 made of high-temperature alloy material. The heat exchange chamber 14 is divided into two sections between the exhaust gas inlet 21 and the left end of the furnace shell outer casing 11. The double-layered corrugated pipe 37 is positioned between the two sections of the heat exchange chamber 14, with both ends of the double-layered corrugated pipe 37 tightly welded and fixed to the heat exchange chamber 14. Under high temperature and high pressure, the double-layered corrugated pipe 37 softens and deforms, protecting the furnace shell 10 and preventing it from bursting. Furthermore, the double-layered corrugated pipe 37 is located outside the furnace shell outer casing 11, allowing the corrugated pipe to directly reflect the deformation status.

[0050] The baffle structure includes several semi-circular baffles 38 spaced apart between the exhaust gas inlet 21 and the right end of the heat exchange chamber 14. The arc-shaped sides of the semi-circular baffles 38 are vertically welded and fixed to the upper or lower inner wall of the heat exchange chamber 14. The planar sides of adjacent semi-circular baffles 38 face each other. The semi-circular baffles 38 have through holes 36 for the heat exchange tubes 23 to pass through vertically. The semi-circular baffles 38 are arranged perpendicular to the heat exchange tubes 23 to guide the exhaust gas, ensuring that the exhaust gas enters the heat exchange chamber 14 and contacts the heat exchange tubes 23 evenly. The flow gaps between the heat exchange tubes 23 slow down the flow velocity of the exhaust gas and reduce the distance between the exhaust gas and the heat exchange tubes 23, allowing the exhaust gas to fully absorb heat and improving the heat conversion rate.

[0051] The explosion venting structure includes a vertically arranged explosion venting channel 41. An inclined explosion vent 42 is provided at the upper end of the explosion venting channel 41. An end cap 43 for closing the explosion vent 42 is provided on the explosion vent 42. The higher side of the end cap 43 is rotatably hinged to the explosion venting channel 41. The inclination angle of the end cap 43 is 10-25°, preferably 15°. A handle 44 for manually opening and closing the end cap 43 is provided on the upper surface of the end cap 43. When the internal pressure is too high, the end cap 43 will automatically open to release the pressure. After the pressure decreases, it will cover the explosion vent 42 again. The inclined arrangement facilitates the automatic reset of the end cap.

[0052] The dispersion structure includes a first windbreak ring 45 and a second windbreak ring 46 arranged sequentially from right to left. A first windbreak fan blade 48 and a second windbreak fan blade 49 are respectively disposed on the first windbreak ring 45 and the second windbreak ring 46. The first windbreak fan blade 48 and the second windbreak fan blade 49 are fixedly disposed on the first windbreak ring 45 and the second windbreak ring 46, with their central portions protruding towards the distribution plate 30 and their outer portions facing the heat exchange chamber 14. Four first support plates 50 and second support plates 51 are respectively disposed on the outer walls of the first windbreak ring 45 and the second windbreak ring 46 for fixing the windbreak rings to the inner wall of the dispersion chamber 15. 1. The first support plate 50 and the second support plate 51 are staggered and inclined. One end of the first support plate 50 is welded and fixed to the first windshield ring 45, and the other end is welded and fixed to the inner wall of the dispersion cavity 15. One end of the second support plate 51 is welded and fixed to the second windshield ring 46, and the other end is welded and fixed to the inner wall of the dispersion cavity 15. The inclination angle between the first support plate 50 and the second support plate 51 is 40-50°, preferably 45°. The outer diameter of the first windshield fan blade 48 is smaller than the outer diameter of the second windshield fan blade 49.

[0053] The movable structure includes a support base 52, and the upper end surface of the support base 52 is provided with an arc-shaped groove 53 that fits against the outer wall of the furnace 10 or the outer wall of the furnace jacket. The lower end of the support base 52 is fixedly provided with a support shaft 54 ​​along the direction perpendicular to the central axis of the furnace 10, and rollers 55 are respectively provided at both ends of the support shaft 54.

[0054] On the furnace shell 10, at the right port of the heat exchange chamber 14, there is a connecting cone 57 whose diameter gradually increases from right to left, which facilitates the further uniform diffusion of exhaust gas. The left port of the connecting cone 57 is welded or integrally fixed to the cavity of the heat exchange chamber 14, and the right port is welded or integrally fixed to the cavity of the dispersion chamber 15. The furnace shell outer sleeve 11 is provided with a reduced diameter section adapted to the shape of the furnace shell 10 at the position of the connecting cone 57. At least three guide plates 58 are evenly distributed axially on the inner wall of the furnace shell outer sleeve 11 at the reduced diameter section. The outer side of the guide plates 58 is welded and fixed to the inner wall of the furnace shell outer sleeve 11. The guide plates 58 restrict the rotational movement of the exhaust gas in the front section, allowing the exhaust gas to use all its energy to accelerate in the axial direction of the furnace shell 10, and then begin spiral movement after entering the spiral guide plate.

[0055] The exhaust gas enters the heat exchange chamber 14, the gas delivery channel 26, and the combustion gap 35 sequentially from the exhaust gas inlet 21 for combustion. Then, under the action of the first fan blade 48 and the second fan blade 49, it enters the heat exchange tube 23 evenly and is finally discharged from the exhaust pipe 18.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger capable of improving heat conversion efficiency, comprising a furnace shell and a furnace shell outer jacket disposed outside the furnace shell, characterized in that: The furnace chamber, arranged from left to right, includes an exhaust gas outlet for discharging the exhaust gas after combustion, a heat exchange chamber for exchanging heat from the exhaust gas, a dispersion chamber for evenly dispersing the exhaust gas to the inner wall of the furnace chamber to facilitate heat absorption by the furnace wall, and a combustion port for the exhaust gas and combustion flame to enter. An exhaust gas inlet is located on the outer wall of the left end of the heat exchange chamber. The left and right ports of the heat exchange chamber are respectively equipped with flow-blocking tube plates to restrict the diffusion of exhaust gas to both ends. The intercepting tube plates are evenly provided with corresponding mounting holes. Between two intercepting tube plates, several heat exchange tubes are arranged to transport the combusted exhaust gas from the dispersion chamber through the heat exchange chamber to the exhaust gas outlet for heat exchange. The two ends of each heat exchange tube are tightly inserted into the mounting holes. A flow gap is formed between the heat exchange tubes to allow exhaust gas to flow while restricting its passage, ensuring the exhaust gas adheres to the heat exchange tubes and passes through evenly, thus improving heat exchange efficiency. The heat exchange chamber is provided with features to guide the exhaust gas to be combusted along a direction perpendicular to the heat exchange tubes, increasing... A baffle structure extends the contact time between the exhaust gas and the heat exchange tubes due to the resistance during the exhaust gas movement process. The furnace shell jacket is tightly fitted onto the furnace shell at the rear end of the heat exchange chamber. Several support blocks are provided between the furnace shell and the furnace shell jacket to maintain a fixed distance. A gas transmission channel is formed between the furnace shell and the furnace shell jacket. The cavity at the rear end of the heat exchange chamber has a vent hole for the exhaust gas in the heat exchange chamber to enter the gas transmission channel between the outer wall of the furnace shell and the furnace shell jacket. A connection port for connecting to an external burner is provided on the right end face of the furnace shell jacket. A distribution plate is provided on the combustion port for concentrating the flame emitted by the burner and fully burning the exhaust gas. A combustion gap is formed between the distribution plate and the connection port. An explosion relief structure is provided at the upper end of the furnace shell jacket at the combustion gap position for automatically releasing pressure when the pressure inside the furnace shell and the furnace shell jacket is too high. A dispersion structure is provided in the dispersion chamber for dispersing the concentrated and burned exhaust gas. Multiple sets of movable structures are provided at intervals at the lower ends of the furnace shell and the furnace shell jacket for easy movement. The furnace shell has a connecting cone with a diameter that gradually increases from right to left at the right port of the heat exchange cavity. The left port of the connecting cone is fixedly connected to the cavity of the heat exchange cavity, and the right port is fixedly connected to the cavity of the dispersion cavity. The furnace shell outer sleeve has a reduced diameter section adapted to the shape of the furnace shell at the position of the connecting cone. At least three guide plates are evenly distributed axially at the reduced diameter section on the inner wall of the furnace shell outer sleeve. The outer side of the guide plates is fixedly installed on the inner wall of the furnace shell outer sleeve. The gas transmission channel is equipped with a guide structure for extending the exhaust gas travel path and absorbing heat fully; the guide structure is a spiral guide plate that is spirally wound and fixed in the gas transmission channel.

2. The heat exchanger according to claim 1, characterized in that: The spiral guide plate is divided into eight segments, with a spacing of 100-300mm between each segment. The eight spiral guide plates are wrapped around the outer wall of the furnace liner.

3. A heat exchanger that can improve heat conversion rate according to claim 1 or 2, characterized in that: The heat exchange chamber is equipped with an expansion structure that adapts to deformation and recovery when the inlet pressure is too high to prevent the furnace shell from bursting.

4. A heat exchanger according to claim 3 that can improve heat conversion rate, characterized in that: The expansion structure is a double-layer corrugated pipe. The heat exchange cavity is divided into two sections between the exhaust gas inlet and the left end of the furnace shell. The double-layer corrugated pipe is disposed between the two sections of the heat exchange cavity. The two ends of the double-layer corrugated pipe are respectively tightly sealed and fixed on the heat exchange cavity.

5. A heat exchanger that can improve heat conversion rate according to claim 1 or 2, characterized in that: The baffle structure includes a plurality of semi-circular baffles spaced apart between the exhaust gas inlet and the right end of the heat exchange chamber. The arc-shaped side of the semi-circular baffles is vertically fixed on the upper or lower inner wall of the heat exchange chamber. The planar side surfaces of adjacent semi-circular baffles face each other. The semi-circular baffles are provided with through holes for the heat exchange tubes to pass through vertically.

6. A heat exchanger according to claim 5 that can improve heat conversion rate, characterized in that: The vent holes include upper vent holes that are uniformly arranged in a single row at the rear end of the upper cavity of the heat exchange chamber.

7. A heat exchanger according to claim 6 that can improve heat conversion rate, characterized in that: The vent also includes a lower vent located on the right end of the inner wall below the heat exchange chamber, and the diameter of the upper vent is smaller than that of the lower vent.

8. A heat exchanger that can improve heat conversion rate according to claim 1 or 2, characterized in that: The explosion venting structure includes a vertically arranged explosion venting channel, an inclined explosion vent at the upper end of the explosion venting channel, an end cap for closing the explosion vent, the upper side of the end cap being rotatably hinged to the explosion venting channel, the inclination angle of the end cap being 10-25°, and a handle for manually opening and closing the end cap being provided on the upper surface of the end cap.

9. A heat exchanger capable of improving heat conversion efficiency according to claim 1 or 2, characterized in that: The distribution plate has an opening in the middle for the inner ring flame to pass through directly, and a through hole on the periphery for the outer ring flame and exhaust gas to pass through. The distribution plate is cut between the through hole and the opening to form a guide hole for the flame and exhaust gas to pass through and a guide plate 1 that guides the flame and exhaust gas passing through the guide hole to the middle. The outer side of the guide plate 1 is fixedly set on the outer side of the guide hole, and the inner side of the guide plate 1 is folded 40-50° towards the dispersion cavity.

10. A heat exchanger according to claim 9 that can improve heat conversion rate, characterized in that: The folding angle of the guide plate is 45°.

11. A heat exchanger according to claim 9 that can improve heat conversion rate, characterized in that: The guide hole and guide plate are both isosceles trapezoids, with the shorter side of the trapezoid facing the center of the distribution plate.

12. A heat exchanger capable of improving heat conversion efficiency according to claim 1 or 2, characterized in that: The dispersion structure includes a first windbreak ring and a second windbreak ring arranged sequentially from right to left. A first baffle fan blade and a second baffle fan blade are respectively provided on the first and second windbreak rings. The first and second baffle fan blades are fixedly mounted on the first and second windbreak rings with their central portions protruding towards the distribution plate and their outer portions facing the heat exchange chamber. At least two first support plates and second support plates are respectively provided on the outer walls of the first and second windbreak rings for fixing the windbreak rings to the inner wall of the dispersion chamber. The first and second support plates are staggered and inclined. One end of the first support plate is fixedly mounted on the first windbreak ring, and the other end is fixedly mounted on the inner wall of the dispersion chamber. One end of the second support plate is fixedly mounted on the second windbreak ring, and the other end is fixedly mounted on the inner wall of the dispersion chamber. The inclination angle between the first and second support plates is 40-50°. The outer diameter of the first baffle fan blade is smaller than the outer diameter of the second baffle fan blade.

13. A heat exchanger capable of improving heat conversion efficiency according to claim 1 or 2, characterized in that: The movable structure includes a support base, the upper end face of which has an arc-shaped groove that fits against the outer wall of the furnace liner or the outer wall of the furnace liner jacket, and the lower end of the support base is provided with a support shaft along the direction perpendicular to the central axis of the furnace liner, and rollers are respectively provided at both ends of the support shaft.

14. A heat exchanger according to claim 1 that can improve heat conversion rate, characterized in that: The outer circumference of the furnace shell is covered with a heat insulation protective cover.

15. A heat exchanger according to claim 1 that can improve heat conversion rate, characterized in that: Insulating cotton is filled around the connection port on the right end face of the furnace liner.

16. A heat exchanger according to claim 1 that can improve heat conversion rate, characterized in that: The support block is a U-shaped support block, and the bottom surface of the U-shaped support block is in contact with the outer wall of the furnace liner.

17. A heat exchanger according to claim 1 that can improve heat conversion rate, characterized in that: The furnace shell has an outlet cone on the left port of the heat exchange cavity, with the diameter gradually decreasing from right to left. An exhaust pipe is provided on the left port of the outlet cone, and the right end of the outlet cone is fixedly connected to the cavity of the heat exchange cavity.

18. A heat exchanger according to claim 1 that can improve heat conversion rate, characterized in that: An air inlet pipe is fixedly installed on the front of the outer wall of the left end of the heat exchange chamber, and the air outlet end of the air inlet pipe is connected to the inside of the heat exchange chamber.

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