An asphalt mixing equipment waste heat recovery device based on high-efficiency heat exchanger

Abstract

This invention relates to the field of heat exchange device technology, and in particular to a waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger. The device includes a base and a waste heat recovery unit connected thereto. A mixing tank is fixedly installed inside the base, and a central shaft is rotatably installed at the center of the mixing tank. The heat exchange medium flowing through the first heat exchange plate, the second heat exchange plate, the arc-shaped heat exchange fins, and the semi-circular heat exchange plate is connected to the waste heat recovery unit, constructing a three-dimensional heat exchange network with coordinated action between the inside and outside of the tank and the mixing components. This significantly increases the heat exchange area and more fully recovers the waste heat from asphalt mixing. The folding and unfolding of the heat exchange plates and the adjustable angle of the arc-shaped heat exchange fins allow the equipment to adjust its state according to the material flow characteristics or heat exchange requirements, changing its contact degree and flow direction with the material, improving the heat exchange effect in corner areas, and thus enabling the equipment to operate adaptively according to the material conditions.

Description

Technical Field

[0001] This invention relates to the field of heat exchange device technology, and in particular to a waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger. Background Technology

[0002] Asphalt mixing equipment is a large-scale mechanical device that forcibly mixes aggregates and mineral powders of different particle sizes with hot asphalt in a certain proportion to produce high-temperature asphalt mixtures for paving roads, airports and other projects. The high-temperature flue gas generated during the drying and heating of aggregates contains a large amount of heat energy. If it is not recovered and directly discharged, it will not only cause huge energy waste, but also damage downstream equipment such as bag filters due to high temperature. However, by installing a waste heat recovery device, this part of the waste heat can be converted into useful energy for heating asphalt or preheating aggregates, thereby reducing fuel consumption and production costs, while reducing greenhouse gas and harmful flue gas emissions.

[0003] Currently, the waste heat recovery equipment used in asphalt mixing still has the following problems: Existing waste heat recovery equipment usually fixes the heat exchange components on the inner wall of the mixing drum or sets them up independently, which leads to excessive cooling and adhesion of materials near the heat exchange surface, while the materials far from the heat exchange surface do not exchange heat sufficiently. This affects the uniformity of mixing and reduces the efficiency of waste heat recovery. Moreover, a single heat exchange structure cannot form a multi-dimensional heat exchange area in the mixing center area or drum wall area, which leads to uneven discharge temperature and serious waste of waste heat in the exhaust gas, making it difficult to achieve efficient and stable waste heat recovery in asphalt mixing. Summary of the Invention

[0004] In view of the problems that the waste heat recovery equipment used in asphalt mixing in the above or existing technologies still has difficulties in coordinating the mixing and heat exchange functions and the overall heat exchange efficiency is low, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides a waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger, which is achieved by the following specific technical means:

[0006] A waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger includes an equipment base and a waste heat recovery device connected thereto. A mixing tank is fixedly installed inside the equipment base, and a central shaft is rotatably installed at the center of the mixing tank.

[0007] A stirring and unfolding mechanism is mounted on a central shaft. The stirring and unfolding mechanism includes several stirring plates that are fixedly mounted on the central shaft and are staggered with each other. A first heat exchange plate is symmetrically hinged to both sides of the stirring plate, and a second heat exchange plate is hinged to the lower end of the first heat exchange plate. An unfolding component connected to the second heat exchange plate is provided on the stirring plate. The unfolding component pushes the second heat exchange plate to fold and unfold the first heat exchange plate and the second heat exchange plate.

[0008] An auxiliary heat exchange mechanism is provided on the mixing tank; the auxiliary heat exchange mechanism includes several arc-shaped heat exchange plates hinged in an array on the lower side of the inner ring wall of the mixing tank, an angle adjustment component for adjusting the tilt angle of the arc-shaped heat exchange plates is provided on the mixing tank, and a semi-circular heat exchange plate is fixedly installed on the outer ring wall of the mixing tank.

[0009] The first heat exchange plate, the second heat exchange plate, the arc-shaped heat exchange plate, and the semi-circular heat exchange plate all have heat exchange media flowing inside them, and all are connected to the waste heat recovery equipment.

[0010] Preferably, the upper end of the equipment base is fixedly installed with a feeding port and a smoke exhaust port that are connected to the mixing tank, and the front end of the equipment base is fixedly installed with a discharge port that is connected to the mixing tank.

[0011] Preferably, a plurality of limiting rods are fixedly installed in the feeding port in a linear array.

[0012] Preferably, the second heat exchange plate is hinged to a connecting column on the side away from the hinged end of the first heat exchange plate.

[0013] Preferably, the unfolding assembly includes a limiting guide rail fixedly mounted on the stirring plate, a first electric push rod fixedly mounted on the limiting guide rail, a first slider fixedly mounted on the telescopic end of the first electric push rod and slidably connected to the limiting guide rail, and a connecting rod corresponding to the first heat exchange plate hinged on the first slider, the connecting rod being rotatably connected to the corresponding connecting column.

[0014] Preferably, the stirring plate is further provided with a locking assembly for locking the second heat exchange plate and the first heat exchange plate when they are unfolded and folded. The locking assembly includes a second electric push rod fixedly installed on the first slider, and an installation plate fixedly installed in the limiting guide rail. The installation plate has a plurality of locking holes in a linear array that are inserted and engaged with the telescopic end of the second electric push rod.

[0015] Preferably, the first heat exchange plate is provided with a support assembly for supporting the first heat exchange plate after it is deployed. The support assembly includes two sliding holes that pass through the stirring plate. A second slider is slidably installed in each sliding hole. A support rod that is symmetrical about the second slider and hinged to the first heat exchange plate is mounted on the second slider. A third electric push rod is fixedly installed on the stirring plate. An insertion hole that is opened through the second slider to engage with the telescopic end of the third electric push rod is provided.

[0016] Preferably, a square stirring plate is fixedly installed at the end of the stirring plate away from the central shaft.

[0017] Preferably, the angle adjustment assembly includes a hydraulic cylinder fixedly installed on the outer ring wall of the mixing tank and corresponding to the arc-shaped heat exchange plate one by one. The telescopic end of the hydraulic cylinder passes through the outer ring wall of the mixing tank and is fixedly installed with a third slider. The third slider is slidably connected to the corresponding arc-shaped heat exchange plate.

[0018] Preferably, the semicircular heat exchange plate has an annular passage inside, and a connecting pipe connected to the waste heat recovery equipment is fixedly installed on the semicircular heat exchange plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: By connecting the heat exchange medium flowing inside the first heat exchange plate, the second heat exchange plate, the arc-shaped heat exchange plate, and the semi-circular heat exchange plate with the waste heat recovery equipment, a three-dimensional heat exchange network is constructed with the inside and outside of the barrel and the mixing components working together. This significantly increases the heat exchange area and more fully recovers the waste heat from asphalt mixing. The heat exchange plates rotate with the mixing plate, dynamically contacting the material for heat exchange while mixing, enhancing heat transfer and avoiding local overheating and temperature stratification, making the temperature of the asphalt mixture more uniform and helping to improve the quality of the finished product. The folding and unfolding of the heat exchange plates and the adjustable angle of the arc-shaped heat exchange plates allow the equipment to adjust its state according to the material flow characteristics or heat exchange requirements, changing its contact degree and flow direction with the material, improving the heat exchange effect in the corner areas, and enabling the equipment to operate adaptively according to the material conditions. At the same time, the inner wall arc-shaped heat exchange plate and the outer wall semi-circular heat exchange plate are combined to simultaneously recover heat on both the inside and outside of the mixing barrel, converting the heat lost from the barrel into usable heat energy, and playing the role of insulation and auxiliary heating, thereby reducing the overall heat loss of the system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention during operation.

[0022] Figure 2 This is a three-dimensional structural diagram of the waste heat recovery equipment of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the device base of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the mixing tank of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the stirring and unfolding mechanism of the present invention.

[0026] Figure 6 This is a plan view of the stirring and unfolding mechanism of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the unfolding component of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the support component of the present invention.

[0029] Figure 9 This is a partial cross-sectional perspective view of the locking component and the supporting component of the present invention.

[0030] Figure 10 This is a partial cross-sectional three-dimensional structural diagram of the arc-shaped heat exchange plate and the stirring tank of the present invention.

[0031] Figure 11 This is a partial cross-sectional three-dimensional structural schematic diagram of the angle adjustment component of the present invention.

[0032] In the diagram: 1. Equipment base; 2. Waste heat recovery equipment; 11. Feed port; 111. Limiting rod; 12. Exhaust port; 13. Discharge port; 3. Mixing tank; 31. Central shaft; 4. Mixing and unfolding mechanism; 41. Mixing plate; 42. Square mixing plate; 43. First heat exchange plate; 44. Second heat exchange plate; 441. Connecting column; 45. Unfolding assembly; 451. Limiting guide rail; 452. First electric push rod; 453. First slider ; 454. Connecting rod; 46. Locking assembly; 461. Second electric push rod; 462. Mounting plate; 463. Lock hole; 47. Support assembly; 471. Sliding hole; 472. Second slider; 473. Support rod; 474. Third electric push rod; 5. Auxiliary heat exchange mechanism; 51. Arc-shaped heat exchange plate; 52. Angle adjustment assembly; 521. Hydraulic cylinder; 522. Third slider; 53. Semi-circular heat exchange plate; 531. Connecting pipeline. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0035] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 A waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger includes an equipment base 1 and a waste heat recovery device 2 connected thereto. A mixing tank 3 is fixedly installed inside the equipment base 1, and a central shaft 31 is rotatably installed at the center of the mixing tank 3.

[0036] A stirring and unfolding mechanism 4 is mounted on a central shaft 31. The stirring and unfolding mechanism 4 includes several stirring plates 41 that are fixedly mounted on the central shaft 31 and are interlaced with each other. A first heat exchange plate 43 is symmetrically hinged to both sides of the stirring plate 41. A second heat exchange plate 44 is hinged to the lower end of the first heat exchange plate 43. An unfolding component 45 connected to the second heat exchange plate 44 is provided on the stirring plate 41. The unfolding component 45 pushes the second heat exchange plate 44 to fold and unfold the first heat exchange plate 43 and the second heat exchange plate 44.

[0037] Please see Figure 3 , Figure 4 and Figure 10 An auxiliary heat exchange mechanism 5 is provided on the mixing tank 3. The auxiliary heat exchange mechanism 5 includes a number of arc-shaped heat exchange plates 51 hinged in an array to the lower side of the inner ring wall of the mixing tank 3. An angle adjustment component 52 for adjusting the tilt angle of the arc-shaped heat exchange plates 51 is provided on the mixing tank 3. A semi-circular heat exchange plate 53 is fixedly installed on the outer ring wall of the mixing tank 3.

[0038] The first heat exchange plate 43, the second heat exchange plate 44, the arc-shaped heat exchange plate 51, and the semi-circular heat exchange plate 53 all have heat exchange medium flowing inside them, and all are connected to the waste heat recovery equipment 2.

[0039] In actual operation, the waste heat recovery device 2 is a steam generator, which is connected to the heat exchange components in the device through pipelines to recover and utilize waste heat. The central shaft 31 is driven by a motor to adapt to the stirring requirements of different materials.

[0040] The mixing plate 41 is made of high-temperature resistant and high-strength metal material. The mixing plate 41 is arranged axially along the central shaft 31 in a spiral staggered manner to ensure that the material can be fully mixed when rotating.

[0041] When the unfolding component 45 pushes the second heat exchange plate 44 to move away from the stirring plate 41, the first heat exchange plate 43 and the second heat exchange plate 44 will gradually open to increase the contact area with the material. When the unfolding component 45 retracts, the two heat exchange plates will fold inward to reduce the heat exchange area or facilitate maintenance.

[0042] The heat exchange medium circulates within the first heat exchange plate 43, the second heat exchange plate 44, the arc-shaped heat exchange plate 51, and the semi-circular heat exchange plate 53 via a pump or circulation system. After absorbing the heat from the flue gas and aggregate in the mixing tank 3, it is transported to the waste heat recovery equipment 2. Each heat exchange component is connected to the waste heat recovery equipment 2 through high-temperature and pressure-resistant pipes to form a closed circulation loop.

[0043] By setting an adjustable rotatable mixing and spreading mechanism 4 at the center of the mixing drum 3, and setting an adjustable auxiliary heat exchange mechanism 5 on the drum wall of the mixing drum 3, a multi-dimensional heat exchange network covering the mixing center area to the drum wall area is formed. This solves the problems of uneven material heat exchange, excessive cooling and adhesion, and serious waste of waste heat caused by the fixed position of heat exchange components in the prior art. It ensures uniform heating of asphalt mixture, improves waste heat recovery efficiency, and reduces the risk of uneven discharge temperature, thus achieving efficient and stable waste heat recovery of asphalt mixing.

[0044] Please see Figure 3 The upper end of the equipment base 1 is fixedly equipped with a feeding port 11 and a smoke exhaust port 12 that are connected to the mixing tank 3, and the front end of the equipment base 1 is fixedly equipped with a discharge port 13 that is connected to the mixing tank 3.

[0045] Please see Figure 3 Several limiting rods 111 are fixedly installed in a linear array inside the feeding port 11.

[0046] Please see Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 A square stirring plate 42 is fixedly installed at the end of the stirring plate 41 away from the central shaft 31.

[0047] In actual operation, the feeding port 11 ensures that the material can smoothly enter the mixing tank 3, providing a stable supply of raw materials for the mixing operation, while the exhaust port 12 can discharge the high-temperature flue gas after heat exchange, avoiding the accumulation of flue gas in the tank after heat exchange, which would affect the mixing and heat exchange efficiency, and at the same time reduce the resistance to flue gas discharge.

[0048] When material passes through the feed inlet 11, the limiting rod 111 can intercept and screen the material in advance. Material that meets the size requirements can pass smoothly through the gap between the limiting rods 111 and enter the mixing tank 3, while aggregate or agglomerated material that exceeds the size limit will be effectively blocked by the limiting rod 111, thereby preventing it from entering the mixing tank 3. This protects the mixing plate 41, the first heat exchange plate 43, the second heat exchange plate 44, the arc-shaped heat exchange plate 51 and other mixing and heat exchange components in the mixing tank 3 from the impact and damage of large-sized materials, significantly extending the service life of the equipment and ensuring the stable and continuous operation of mixing and waste heat recovery.

[0049] When the central shaft 31 drives the stirring plate 41 to rotate, the square stirring plate 42 also rotates. Its working area is close to the inner wall of the mixing tank 3. The square structure of the square stirring plate 42 enables it to effectively scrape and turn the material during rotation, thereby solving the problem of insufficient mixing of the stirring plate 41 in the tank wall area, avoiding the formation of mixing dead corners and accumulation and adhesion of materials near the tank wall, and ensuring continuous turning and uniform mixing of materials in the tank wall area.

[0050] Please see Figure 7 , Figure 8 and Figure 9 The second heat exchange plate 44 is hinged to a connecting column 441 on the side away from the hinged end of the first heat exchange plate 43.

[0051] Please see Figure 5 , Figure 7 and Figure 9 The unfolding component 45 includes a limiting guide rail 451 fixedly installed on the stirring plate 41. A first electric push rod 452 is fixedly installed on the limiting guide rail 451. A first slider 453 that is slidably connected to the limiting guide rail 451 is fixedly installed on the telescopic end of the first electric push rod 452. A connecting rod 454 corresponding to the first heat exchange plate 43 is hinged on the first slider 453. The connecting rod 454 is rotatably connected to the corresponding connecting column 441.

[0052] In actual operation, the hinge of the connecting column 441 allows the unfolding assembly 45 to adapt to the angular deviation generated during the transmission process by rotating the connecting column 441 when pushing the second heat exchange plate 44, reducing the assembly difficulty and ensuring the uniform distribution of transmission force, thus preventing the second heat exchange plate 44 from deforming due to excessive local stress.

[0053] The first electric push rod 452 drives the first slider 453 to slide on the limiting guide rail 451, while the connecting rod 454 rotates and connects with the connecting column 441 on the second heat exchange plate 44, causing the second heat exchange plate 44 to rotate relative to the first heat exchange plate 43, so that the first heat exchange plate 43 and the second heat exchange plate 44 on both sides of the stirring plate 41 can be unfolded or folded.

[0054] This allows for control over the extent of heat exchange plate expansion, flexibly adapting to the adjustment requirements of heat exchange area under different mixing conditions, thereby improving the heat exchange efficiency of waste heat recovery and ensuring the normal operation of asphalt mixing.

[0055] Please see Figure 5 and Figure 9The stirring plate 41 is also provided with a locking component 46 for locking the second heat exchange plate 44 and the first heat exchange plate 43 to unfold and fold. The locking component 46 includes a second electric push rod 461 fixedly installed on the first slider 453. A mounting plate 462 is fixedly installed in the limiting guide rail 451. The mounting plate 462 has a plurality of locking holes 463 in a linear array that are inserted and engaged with the telescopic end of the second electric push rod 461.

[0056] In actual operation, after the first heat exchange plate 43 and the second heat exchange plate 44 are adjusted to the required folded or unfolded state by the unfolding component 45, the second electric push rod 461 extends and inserts into the corresponding locking hole 463, thereby fixing the first slider 453 at a specific position on the limiting guide rail 451.

[0057] This is to prevent the first slider 453 from being accidentally displaced when the first heat exchange plate 43 and the second heat exchange plate 44 are subjected to the force of the asphalt material during the mixing operation, and to ensure that the first heat exchange plate 43 and the second heat exchange plate 44 can be stably maintained in the preset folded or unfolded state, thus maintaining the stability of the adjusted heat exchange area.

[0058] Please see Figure 5 , Figure 8 and Figure 9 The first heat exchange plate 43 is provided with a support assembly 47 for supporting the first heat exchange plate 43 after it is deployed. The support assembly 47 includes two sliding holes 471 that are opened through the stirring plate 41. A second slider 472 is slidably installed in each of the sliding holes 471. A support rod 473 that is symmetrical about it and hinged to the first heat exchange plate 43 is hinged on the second slider 472. A third electric push rod 474 is fixedly installed on the stirring plate 41. An insertion hole is opened through the second slider 472 to be inserted into the telescopic end of the third electric push rod 474.

[0059] In specific operation, when the first heat exchange plate 43 is extended to the preset angle, the second slider 472 adjusts its position through the sliding hole 471 so that the support rod 473 can support the first heat exchange plate 43 at the optimal angle. Then, the telescopic end of the third electric push rod 474 is inserted into the insertion hole on the second slider 472 to lock the second slider 472. This ensures that the first heat exchange plate 43 will not shake, shift, or accidentally fold when impacted by asphalt material, thereby ensuring that the preset heat exchange area is maintained, improving the efficiency of waste heat recovery, and avoiding interference with normal mixing operations, ensuring the uniformity of asphalt material mixing.

[0060] Please see Figure 4 , Figure 10 and Figure 11The angle adjustment assembly 52 includes a hydraulic cylinder 521 fixedly installed on the outer ring wall of the mixing tank 3 and corresponding one-to-one with the arc-shaped heat exchange plate 51. The telescopic end of the hydraulic cylinder 521 passes through the outer ring wall of the mixing tank 3 and is fixedly installed with a third slider 522. The third slider 522 is slidably connected to the corresponding arc-shaped heat exchange plate 51.

[0061] In practical operation, when the angle of the arc-shaped heat exchange plate 51 needs to be adjusted, the hydraulic cylinder 521 is activated to control the third slider 522 to rise or fall. The third slider 522 is slidably connected to the arc-shaped heat exchange plate 51 to adapt to the relative displacement problem caused by the adjustment of the arc-shaped heat exchange plate 51, ensuring the smoothness and reliability of the angle adjustment process. Thus, by adjusting the contact area and heat exchange efficiency between the arc-shaped heat exchange plate 51 and the asphalt material, flexible control of the heat exchange area can be achieved, and the waste heat recovery needs under different working conditions can be adapted.

[0062] Please see Figure 4 and Figure 10 The semicircular heat exchange plate 53 has an annular passage inside, and a connecting pipe 531 connected to the waste heat recovery equipment 2 is fixedly installed on the semicircular heat exchange plate 53.

[0063] In specific work,

[0064] The semicircular heat exchange plate 53 has an annular passage inside, ensuring that the heat exchange medium flows completely and evenly through the entire coverage area of ​​the semicircular heat exchange plate 53, making full use of its heat exchange area, avoiding the generation of local heat exchange dead zones, and ensuring that the heat exchange medium can fully absorb the waste heat emitted from the outer wall of the mixing tank 3. At the same time, a connecting pipe 531 connected to the waste heat recovery device 2 is fixedly installed on the semicircular heat exchange plate 53, providing a stable and reliable flow channel for the heat exchange medium. This allows the heat-carrying heat exchange medium to be stably and efficiently transported to the waste heat recovery device 2 to complete heat recovery, thereby ensuring the stability of the entire heat exchange circuit and avoiding problems such as heat exchange medium leakage or flow interruption, and realizing the full recovery of waste heat emitted from the mixing tank 3.

[0065] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waste heat recovery device for an asphalt mixing plant based on a high-efficiency heat exchanger, comprising a base (1) and a waste heat recovery device (2) connected thereto, characterized in that: A mixing tank (3) is fixedly installed inside the equipment base (1), and a central shaft (31) is rotatably installed at the center of the mixing tank (3); The stirring and unfolding mechanism (4) is mounted on the central shaft (31); The stirring and unfolding mechanism (4) includes several stirring plates (41) fixedly installed on the central shaft (31) and intersecting with each other. The stirring plates (41) are symmetrically hinged with first heat exchange plates (43) on both sides. The lower end of the first heat exchange plates (43) is hinged with a second heat exchange plate (44). The stirring plates (41) are provided with unfolding components (45) connected to the second heat exchange plates (44). The unfolding components (45) push the second heat exchange plates (44) to fold and unfold the first heat exchange plates (43) and the second heat exchange plates (44). An auxiliary heat exchange mechanism (5) is installed on the mixing tank (3); The auxiliary heat exchange mechanism (5) includes several arc-shaped heat exchange plates (51) hinged in an array to the lower side of the inner ring wall of the stirring tank (3). An angle adjustment component (52) for adjusting the tilt angle of the arc-shaped heat exchange plates (51) is provided on the stirring tank (3). A semi-circular heat exchange plate (53) is fixedly installed on the outer ring wall of the stirring tank (3). The first heat exchange plate (43), the second heat exchange plate (44), the arc-shaped heat exchange plate (51) and the semi-circular heat exchange plate (53) all have heat exchange medium flowing inside them, and all are connected to the waste heat recovery equipment (2).

2. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 1, characterized in that: The upper end of the equipment base (1) is fixedly equipped with a feeding port (11) and a smoke exhaust port (12) connected to the mixing tank (3), and the front end of the equipment base (1) is fixedly equipped with a discharge port (13) connected to the mixing tank (3).

3. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 2, characterized in that: Several limiting rods (111) are fixedly installed in the feeding port (11) in a linear array.

4. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 1, characterized in that: The second heat exchange plate (44) has a connecting column (441) hinged to the side away from the hinge end of the first heat exchange plate (43).

5. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 4, characterized in that: The unfolding assembly (45) includes a limiting guide rail (451) fixedly installed on the stirring plate (41), a first electric push rod (452) fixedly installed on the limiting guide rail (451), a first slider (453) slidably connected to the limiting guide rail (451) fixedly installed at the telescopic end of the first electric push rod (452), and a connecting rod (454) corresponding to the first heat exchange plate (43) hinged on the first slider (453), and the connecting rod (454) rotatably connected to the corresponding connecting column (441).

6. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 5, characterized in that: The stirring plate (41) is also provided with a locking assembly (46) for locking the second heat exchange plate (44) and the first heat exchange plate (43) to unfold and fold. The locking assembly (46) includes a second electric push rod (461) fixedly installed on the first slider (453). A mounting plate (462) is fixedly installed in the limiting guide rail (451). The mounting plate (462) has a plurality of locking holes (463) in a linear array that are inserted and cooperate with the telescopic end of the second electric push rod (461).

7. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 1, characterized in that: The first heat exchange plate (43) is provided with a support assembly (47) for supporting the first heat exchange plate (43) after it is deployed. The support assembly (47) includes two sliding holes (471) that are opened through the stirring plate (41). A second slider (472) is slidably installed in each of the sliding holes (471). A support rod (473) that is symmetrical about it and hinged to the first heat exchange plate (43) is hinged on the second slider (472). A third electric push rod (474) is fixedly installed on the stirring plate (41). An insertion hole is opened through the second slider (472) for insertion and cooperation with the telescopic end of the third electric push rod (474).

8. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 1, characterized in that: A square stirring plate (42) is fixedly installed at the end of the stirring plate (41) away from the central shaft (31).

9. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 1, characterized in that: The angle adjustment assembly (52) includes a hydraulic cylinder (521) fixedly installed on the outer ring wall of the mixing tank (3) and corresponding one-to-one with the arc-shaped heat exchange plate (51). The telescopic end of the hydraulic cylinder (521) passes through the outer ring wall of the mixing tank (3) and is fixedly installed with a third slider (522). The third slider (522) is slidably connected to the corresponding arc-shaped heat exchange plate (51).

10. The waste heat recovery device for asphalt mixing equipment based on a high-efficiency heat exchanger as described in claim 9, characterized in that: The semicircular heat exchange plate (53) has an annular passage inside, and a connecting pipe (531) connected to the waste heat recovery equipment (2) is fixedly installed on the semicircular heat exchange plate (53).

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