Drying oven waste heat recovery device

Abstract

The invention discloses an oven waste heat recovery device, and relates to the technical field of waste heat recovery devices. The water heater comprises a hot water tank and a heat dissipation pipe, a plurality of heat dissipation plates are arranged on the inner wall of the hot water tank in a circumferential array mode, a guide cylinder is arranged between the heat dissipation plates, the heat dissipation pipe penetrates through the heat dissipation plates, the part, in the hot water tank, of the heat dissipation pipe is of a spiral structure, and the first end and the second end of the heat dissipation pipe both extend out of the hot water tank. By starting the stirring mechanism to stir water in the hot water tank and starting the circulating water flow stirring mechanism, water at different heights in the hot water tank can be conveniently driven to be convectively stirred, the water mixing effect in the hot water tank is improved, and meanwhile water is driven to be discharged into a water flowing area through the bottom face of the inner wall of the hot water tank; and the circulating water flow is stirred at the stirring mechanism, so that the water in the hot water tank is conveniently stirred and mixed and circularly flows to absorb heat, and the waste heat recovery effect of the hot air exhausted by the drying oven is improved.

Description

Technical Field

[0001] The invention belongs to the field of waste heat recovery devices, and in particular relates to a waste heat recovery device for an oven. Background Art

[0002] When the drying box is in use, in order to ensure the drying efficiency, the hot air production system inside it needs to maintain stable operation for a long time, and its energy consumption is relatively high. At the same time, some of the waste heat generated by the drying box will be dissipated into the surrounding environment, causing a certain amount of energy waste.

[0003] The Chinese patent with the announcement number CN205192207U discloses a waste heat recovery device for an oven, including an oven, an oven inlet steam valve and a steam trap are arranged in the oven, bypass valves are connected in parallel at both ends of the steam trap, the output end of the steam trap is connected to a hot water tank through an outlet main pipe, a float valve and a float are arranged in the hot water tank, the float valve is connected to a water supply pipe, and a hot water pump is arranged at one end of the hot water tank. It has the characteristics of simple process, convenient and fast operation, and reduces production costs, saves energy, and reduces water consumption;

[0004] However, the waste heat recovery and utilization device of the above-mentioned oven discharges the air with waste heat directly into the water in the hot water tank, while the water remains still in the hot water tank, resulting in a slow heat conduction efficiency between the water in the hot water tank, resulting in a high water temperature in the hot water tank at the exhaust end and a low water temperature in the rest of the hot water tank, which causes the water in the hot water tank to be unable to absorb heat evenly, affecting the heat recovery effect of the waste heat air.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drying oven waste heat recovery device.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A device for recovering waste heat from an oven comprises a hot water tank and a heat dissipation pipe. A plurality of heat dissipation plates are arranged in a circular array on the inner wall of the hot water tank. A guide tube is arranged between the plurality of heat dissipation plates. The heat dissipation pipe runs through the plurality of heat dissipation plates. The heat dissipation pipe is in a spiral structure in the hot water tank. The first end and the second end of the heat dissipation pipe both extend out of the hot water tank. A water flow area is formed between the outer side of the guide tube and the inner wall of the hot water tank. A stirring mechanism is arranged in the hot water tank. A circulating water flow stirring mechanism is arranged in the hot water tank.

[0009] Optionally, the stirring mechanism includes a mesh plate rotatably fitted in the guide tube, a sealing plate fixedly mounted on the mesh plate for sealing the bottom end of the guide tube, a first driving mechanism disposed at the bottom end of the hot water tank for driving the mesh plate to rotate, and a plurality of stirring members disposed on the upper side of the sealing plate.

[0010] Optionally, the first driving mechanism includes a connecting shaft installed at the bottom end of the mesh plate, a first servo motor installed at the bottom end of the hot water tank, and a polygonal rod installed at the output end of the first servo motor. The connecting shaft is slidably sleeved on the polygonal rod, and a polygonal hole is provided at the bottom end of the connecting shaft. The connecting shaft is slidably sleeved on the polygonal rod through the polygonal hole.

[0011] Optionally, a support ring is provided in the hot water tank for vertical sliding. A plurality of electric push rods are provided at the bottom of the hot water tank for driving the support ring to slide vertically. The output shaft of the electric push rod extends into the hot water tank and is fixedly connected to the support ring. A first bearing is provided in the support ring, and one end of the connecting shaft is fixed in the first bearing.

[0012] Optionally, the stirring member includes a mounting bar connected to the upper side of the sealing plate, and a plurality of first stirring blades arranged on one side of the mounting bar.

[0013] Optionally, the circulating water flow stirring mechanism includes a mesh cylinder rotatably engaged on the sealing plate and connected to the mesh plate, a transmission shaft rotatably engaged with the mesh cylinder, auger blades arranged between the outer side of the transmission shaft and the inner wall of the mesh cylinder, and a second driving mechanism arranged on the upper side of the hot water tank. There are multiple groups of second stirring blades in a circular array on the outer side of the mesh cylinder, the transmission shaft sliding sleeve is arranged on the output end of the second driving mechanism, an annular groove is provided on the upper side of the sealing plate, a second bearing is provided in the annular groove, and the bottom end of the mesh cylinder is fixed in the second bearing.

[0014] Optionally, the multiple groups of second stirring blades correspond one-to-one to the multiple stirring members, each group of second stirring blades includes a plurality of second stirring blades arrayed on the mesh tube along the height direction, and the plurality of first stirring blades and the plurality of second stirring blades are alternately arranged.

[0015] Optionally, the second driving mechanism includes a second servo motor arranged on the upper side of the hot water tank, a polygonal column arranged at one end of the second servo motor output shaft extending into the hot water tank, and a polygonal groove arranged on the upper side of the transmission shaft, and the transmission shaft is slidably mounted on the polygonal column through the polygonal groove.

[0016] Optionally, multiple heat sinks are provided with through holes corresponding to the heat pipes, and two mounting holes are provided on the side of the hot water tank, and the heat pipes are fixed in the through holes and the two mounting holes.

[0017] Optionally, the first end of the heat dissipation pipe extends out of the hot water tank and is connected to a first water tank, a connecting pipe is connected to the upper side of the first water tank, the second end of the heat dissipation pipe extends out of the hot water tank and is sequentially connected to a second water tank and an air suction fan, the sides of the first water tank and the second water tank are both connected to drain valves, the upper side of the hot water tank is connected to a water inlet valve, and the side of the hot water tank is connected to a water outlet valve.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described below at the same time:

[0019] It is connected to the exhaust pipe of the oven through a connecting pipe, and the suction fan is turned on to drive the hot air in the exhaust pipe of the oven into the first water tank through the connecting pipe, and then into the heat dissipation pipe, and then into the suction fan through the second water tank, and finally discharged by the suction fan. By setting the first water tank and the second water tank, it is convenient for the water generated by the condensation of the hot air in the heat dissipation pipe to flow down to the first water tank, or be brought into the second water tank by the air flow, so as to collect the condensed water and reduce the condensed water from entering the suction fan and affecting the operation of the suction fan, or being discharged through the suction fan, causing waste of water resources. The stirring mechanism is turned on, and the first servo motor drives the polygonal rod to drive the connecting shaft, the mesh plate, and the sealing plate to rotate, and then drives the mounting strip and the first stirring blade to rotate, stir the water in the guide cylinder, and turn on the circulating water stirring mechanism. The driving direction of the second servo motor is opposite to that of the first servo motor. The second servo motor drives the transmission shaft, the auger blade, and the second stirring blade to rotate through the polygonal column to stir The water in the guide tube is convenient to drive the water at different heights in the hot water tank to stir by convection, because the multiple second stirring blades are staggered and rotate in opposite directions to the multiple first stirring blades, thereby improving the mixing effect of the water in the hot water tank and the uniformity of the water temperature in the hot water tank. The stirred water enters the mesh tube through the mesh holes on the mesh tube, and the auger blades drive the water to move downward through the mesh plate, and is discharged into the water flow area through the sealing plate and the bottom surface of the inner wall of the hot water tank, and then flows upward in the water flow area and is discharged back to the guide tube and the mesh tube for stirring, so as to facilitate the stirring and mixing of the water in the hot water tank and circulate the water to absorb heat, thereby improving the waste heat recovery effect of the hot air discharged from the oven, turning on the electric push rod to drive the support ring to move back and forth vertically, thereby driving the connecting shaft to slide on the polygonal rod, and the transmission shaft is on the polygonal column, adjusting the height of the sealing plate and the mesh tube, so as to facilitate the convection stirring of the second stirring blade and the first stirring blade at different heights, so as to further improve the uniformity of the stirring and mixing of the water in the hot water tank.

[0020] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the heat dissipation pipe structure according to an embodiment of the present invention;

[0025] Figure 4A schematic diagram of the structure of a stirring mechanism and a circulating water flow stirring mechanism according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a stirring mechanism according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of a circulating water flow stirring mechanism according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the support ring structure according to an embodiment of the present invention;

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] Hot water tank 1, heat dissipation plate 2, guide tube 3, heat dissipation pipe 4, water flow area 5, stirring mechanism 6, mesh plate 601, sealing plate 602, first driving mechanism 603, connecting shaft 6031, first servo motor 6032, polygonal rod 6033, polygonal hole 6034, stirring member 604, mounting strip 6041, first stirring blade 6042, circulating water flow stirring mechanism 7, mesh tube 701, transmission shaft 702, auger blade 703, second driving mechanism 704, second servo motor 7041, polygonal column 7042, polygonal groove 7043, second stirring blade 705, supporting ring 8, electric push rod 9, through hole 10, mounting hole 11, first water tank 12, connecting pipe 13, second water tank 14, suction fan 15, water inlet valve 16, water outlet valve 17.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] See also Figure 1-7 As shown, in this embodiment, a device for recovering waste heat from an oven is provided, including a hot water tank 1 and a heat dissipation pipe 4. A plurality of heat dissipation plates 2 are arranged in a circular array on the inner wall of the hot water tank 1. A guide tube 3 is arranged between the plurality of heat dissipation plates 2. The heat dissipation pipe 4 penetrates the plurality of heat dissipation plates 2. The heat dissipation pipe 4 partially presents a spiral structure in the hot water tank 1. The first end and the second end of the heat dissipation pipe 4 both extend out of the hot water tank 1. A water flow area 5 is formed between the outer side of the guide tube 3 and the inner wall of the hot water tank 1. A stirring mechanism 6 is arranged in the hot water tank 1, and a circulating water flow stirring mechanism 7 is arranged in the hot water tank 1.

[0034] By starting the stirring mechanism 6 to stir the water in the hot water tank 1 and starting the circulating water stirring mechanism 7, it is convenient to drive the convection stirring of water at different heights in the hot water tank 1, thereby improving the mixing effect of the water in the hot water tank 1, and at the same time drive the water to be discharged into the water flow area 5 through the bottom surface of the inner wall of the hot water tank 1, and then flow upward in the water flow area 5 and return to the stirring mechanism 6 and the circulating water stirring mechanism 7 for stirring, so that the water in the hot water tank 1 is stirred and mixed and circulated to absorb heat, thereby improving the waste heat recovery effect of the hot air discharged from the oven.

[0035] See also Figure 2-5 As shown, the stirring mechanism 6 of this embodiment includes a mesh plate 601 rotatably matched in the guide tube 3, a sealing plate 602 fixedly sleeved on the mesh plate 601 for sealing the bottom end of the guide tube 3, a first driving mechanism 603 provided at the bottom end of the hot water tank 1 for driving the mesh plate 601 to rotate, and a plurality of stirring members 604 provided on the upper side of the sealing plate 602. The first driving mechanism 603 includes a connecting shaft 6031 installed at the bottom end of the mesh plate 601, a first servo motor 6032 provided at the bottom end of the hot water tank 1, and a polygonal rod 6033 provided at the output end of the first servo motor 6032. The connecting shaft 6031 slides on the sleeve It is arranged on the polygonal rod 6033, and a polygonal hole 6034 is arranged at the bottom end of the connecting shaft 6031. The connecting shaft 6031 is slidably mounted on the polygonal rod 6033 through the polygonal hole 6034. The stirring member 604 includes a mounting strip 6041 connected to the upper side of the sealing plate 602 and a plurality of first stirring blades 6042 arranged on one side of the mounting strip 6041, so that the first servo motor 6032 drives the polygonal rod 6033 to drive the connecting shaft 6031, the mesh plate 601, and the sealing plate 602 to rotate, thereby driving the mounting strip 6041 and the first stirring blade 6042 to rotate, and stirring the water in the guide tube 3.

[0036] See also Figure 2-7As shown, the circulating water flow stirring mechanism 7 of this embodiment includes a mesh cylinder 701 rotatably matched on the sealing plate 602 and connected to the mesh plate 601, a transmission shaft 702 rotatably matched with the mesh cylinder 701, an auger blade 703 arranged between the outer side of the transmission shaft 702 and the inner wall of the mesh cylinder 701, and a second driving mechanism 704 arranged on the upper side of the hot water tank 1. A plurality of groups of second stirring blades 705 are arranged in a circular array on the outer side of the mesh cylinder 701. The transmission shaft 702 is slidably sleeved on the output end of the second driving mechanism 704. An annular groove is provided on the upper side of the sealing plate 602, and a second bearing is provided in the annular groove. The bottom end of the mesh cylinder 701 is fixed in the second bearing. The plurality of groups of second stirring blades 705 correspond to the plurality of stirring members 604 one by one, and each group of second stirring blades 705 includes a plurality of second stirring blades 705 arranged along the height direction. A plurality of second stirring blades 705 are arrayed on the mesh tube 701, and a plurality of first stirring blades 6042 are alternately arranged with the plurality of second stirring blades 705. The second driving mechanism 704 includes a second servo motor 7041 arranged on the upper side of the hot water tank 1, a polygonal column 7042 arranged at one end of the output shaft of the second servo motor 7041 extending into the hot water tank 1, and a polygonal groove 7043 arranged on the upper side of the transmission shaft 702. The transmission shaft 702 is slidably sleeved on the polygonal column 7042 through the polygonal groove 7043, so that the first servo motor 6032 drives the polygonal rod 6033 to drive the connecting shaft 6031, the mesh plate 601, and the sealing plate 602 to rotate, thereby driving the mounting bar 6041 and the first stirring blade 6042 to rotate, and stirring the water in the guide tube 3.

[0037] See also Figure 2 , 7 As shown, the hot water tank 1 of this embodiment is equipped with a support ring 8 for vertical sliding. The bottom end of the hot water tank 1 is provided with a plurality of electric push rods 9 for driving the support ring 8 to slide vertically. The output shaft of the electric push rod 9 extends into the hot water tank 1 and is fixedly connected to the support ring 8. A first bearing is provided in the support ring 8. One end of the connecting shaft 6031 is fixed in the first bearing, which is convenient for opening the electric push rod 9 to drive the support ring 8 to move vertically back and forth, thereby driving the connecting shaft 6031 to slide on the polygonal rod 6033. The transmission shaft 702 is on the polygonal column 7042 to adjust the height of the sealing plate 602 and the mesh tube 701, so as to facilitate the convection stirring of the second stirring blade 705 and the first stirring blade 6042 at different heights, so as to further improve the uniformity of water stirring and mixing in the hot water tank 1.

[0038] See also Figure 1-3 As shown, the multiple heat sinks 2 of this embodiment are provided with through holes 10 corresponding to the heat sinks 4, and the side of the hot water tank 1 is provided with two mounting holes 11. The heat sinks 4 are fixed in the through holes 10 and the two mounting holes 11, which facilitates the installation of the heat sinks 4 on the hot water tank 1 and the multiple heat sinks 2.

[0039] See also Figure 1-3As shown, the first end of the heat dissipation pipe 4 of this embodiment extends out of the hot water tank 1 and is connected to the first water tank 12, the upper side of the first water tank 12 is connected to a connecting pipe 13, the second end of the heat dissipation pipe 4 extends out of the hot water tank 1 and is sequentially connected to the second water tank 14 and the suction fan 15, the sides of the first water tank 12 and the second water tank 14 are both connected to drain valves, the upper side of the hot water tank 1 is connected to a water inlet valve 16, and the side of the hot water tank 1 is connected to a water outlet valve 17, which is convenient for connecting with the oven outlet pipe through the connecting pipe 13, and turning on the suction fan 15 drives the hot air in the oven outlet pipe to enter the first water tank 12 through the connecting pipe 13, Then it enters the heat dissipation pipe 4, enters the suction fan 15 through the second water tank 14, and is finally discharged by the suction fan 15. By arranging the first water tank 12 and the second water tank 14, it is convenient for the water generated by the condensation of hot air in the heat dissipation pipe 4 to flow down to the first water tank 12, or be brought into the second water tank 14 by the air flow, so as to collect the condensed water and reduce the condensed water entering the suction fan 15, affecting the operation of the suction fan 15, or being discharged through the suction fan 15, causing a waste of water resources. Water is replenished to the hot water tank 1 through the water inlet valve 16, and the hot water in the hot water tank 1 is discharged through the water outlet valve 17.

[0040] Working principle: connect with the oven air outlet pipe through the connecting pipe 13, turn on the suction fan 15 to drive the hot air in the oven air outlet pipe into the first water tank 12 through the connecting pipe 13, then enter the heat dissipation pipe 4, enter the suction fan 15 through the second water tank 14, and finally discharge it through the suction fan 15. By setting the first water tank 12 and the second water tank 14, it is convenient for the water generated by the condensation of the hot air in the heat dissipation pipe 4 to flow down to the first water tank 12, or be brought into the second water tank 14 by the air flow, so as to collect the condensed water and reduce the condensed water from entering the suction fan 15, affecting the operation of the suction fan 15, or being discharged through the suction fan 15, causing waste of water resources;

[0041] The hot air conducts heat to the water in the hot water tank 1 through the heat pipe 4, and absorbs the heat of the heat pipe 4 through the heat plate 2. The heat plate 2 conducts heat to the water in the hot water tank 1, thereby improving the heat dissipation efficiency of the heat pipe 4.

[0042] The stirring mechanism 6 is turned on, and the first servo motor 6032 drives the polygonal rod 6033 to drive the connecting shaft 6031, the mesh plate 601, and the sealing plate 602 to rotate, thereby driving the mounting strip 6041 and the first stirring blade 6042 to rotate, and stirring the water in the guide tube 3. The circulating water stirring mechanism 7 is turned on, and the driving direction of the second servo motor 7041 is opposite to that of the first servo motor 6032. The second servo motor 7041 drives the transmission shaft 702, the auger blade 703, and the second stirring blade 705 to rotate through the polygonal column 7042 to stir the water in the guide tube 3. Because the multiple second stirring blades 705 and the multiple first stirring blades 6042 are staggered and rotate in opposite directions, it is convenient to drive the convection stirring of water at different heights in the hot water tank 1, improve the mixing effect of the water in the hot water tank 1, and improve the uniformity of the water temperature in the hot water tank 1. The stirred water enters the mesh tube 701 through the mesh holes on the mesh tube 701, and the auger blade 703 drives the water to move downward through the mesh plate 601, and is discharged into the water flow area 5 through the sealing plate 602 and the bottom surface of the inner wall of the hot water tank 1, and then flows upward in the water flow area 5 and is discharged back to the guide tube 3 and the mesh tube 701 for stirring, so as to facilitate the stirring and mixing of the water in the hot water tank 1 and circulate and absorb heat, thereby improving the waste heat recovery effect of the hot air discharged from the oven, and starting the electric push rod 9 to drive the support ring 8 to move back and forth vertically, thereby driving the connecting shaft 6031 to slide on the polygonal rod 6033, and the transmission shaft 702 is on the polygonal column 7042, and the height of the sealing plate 602 and the mesh tube 701 is adjusted, so as to facilitate the convection stirring of the second stirring blade 705 and the first stirring blade 6042 at different heights, so as to further improve the uniformity of the stirring and mixing of the water in the hot water tank 1.

[0043] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. All electrical appliances in the present invention are powered by external power supplies or built-in batteries. All electrical appliances in the present invention are not limited to models and specific types. Those skilled in the art can clearly use applicable electrical appliance models and specific types and electrical power supply methods based on common sense in the field.

[0044] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. The technology, shape, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A drying oven waste heat recovery device, characterized in that: include: A hot water tank (1) and a heat dissipation pipe (4). The inner wall of the hot water tank (1) is provided with a plurality of heat dissipation plates (2) in a circular array. A guide tube (3) is provided between the plurality of heat dissipation plates (2). The heat dissipation pipe (4) penetrates through the plurality of heat dissipation plates (2). The heat dissipation pipe (4) is partially in a spiral structure in the hot water tank (1). The first end and the second end of the heat dissipation pipe (4) both extend out of the hot water tank (1). A water flow area (5) is formed between the outer side of the guide tube (3) and the inner wall of the hot water tank (1). A stirring mechanism (6) is provided in the hot water tank (1). A circulating water flow stirring mechanism (7) is provided in the hot water tank (1).

2. The oven waste heat recovery device according to claim 1, characterized in that: The stirring mechanism (6) comprises a mesh plate (601) rotatably engaged in the guide tube (3), a sealing plate (602) fixedly mounted on the mesh plate (601) and used to seal the bottom end of the guide tube (3), a first driving mechanism (603) disposed at the bottom end of the hot water tank (1) and used to drive the mesh plate (601) to rotate, and a plurality of stirring members (604) disposed on the upper side of the sealing plate (602).

3. The oven waste heat recovery device according to claim 2, characterized in that: The first driving mechanism (603) comprises a connecting shaft (6031) mounted on the bottom end of the mesh plate (601), a first servo motor (6032) mounted on the bottom end of the hot water tank (1), and a polygonal rod (6033) mounted on the output end of the first servo motor (6032); the connecting shaft (6031) is slidably mounted on the polygonal rod (6033); a polygonal hole (6034) is provided at the bottom end of the connecting shaft (6031); and the connecting shaft (6031) is slidably mounted on the polygonal rod (6033) through the polygonal hole (6034).

4. The oven waste heat recovery device according to claim 3, characterized in that: A support ring (8) is provided in the hot water tank (1) for vertical sliding engagement. A plurality of electric push rods (9) for driving the support ring (8) to slide vertically are provided at the bottom end of the hot water tank (1). The output shafts of the electric push rods (9) extend into the hot water tank (1) and are fixedly connected to the support ring (8). A first bearing is provided in the support ring (8), and one end of the connecting shaft (6031) is fixed in the first bearing.

5. The oven waste heat recovery device according to claim 4, characterized in that: The stirring member (604) includes a mounting strip (6041) connected to the upper side of the sealing plate (602) and a plurality of first stirring blades (6042) arranged on one side of the mounting strip (6041).

6. The oven waste heat recovery device according to claim 5, characterized in that: The circulating water flow stirring mechanism (7) comprises a mesh cylinder (701) rotatably engaged with the sealing plate (602) and connected to the mesh plate (601), a transmission shaft (702) rotatably engaged with the mesh cylinder (701), an auger blade (703) arranged between the outer side of the transmission shaft (702) and the inner wall of the mesh cylinder (701), and a second driving mechanism (704) arranged on the upper side of the hot water tank (1); a plurality of groups of second stirring blades (705) are arranged in a circular array on the outer side of the mesh cylinder (701); the transmission shaft (702) is slidably sleeved on the output end of the second driving mechanism (704); an annular groove is arranged on the upper side of the sealing plate (602); a second bearing is arranged in the annular groove; and the bottom end of the mesh cylinder (701) is fixed in the second bearing.

7. The oven waste heat recovery device according to claim 6, characterized in that: The multiple groups of second stirring blades (705) correspond one-to-one to the multiple stirring members (604), and each group of second stirring blades (705) includes multiple second stirring blades (705) arrayed on the mesh tube (701) along the height direction, and the multiple first stirring blades (6042) and the multiple second stirring blades (705) are arranged alternately.

8. The oven waste heat recovery device according to claim 7, characterized in that: The second driving mechanism (704) comprises a second servo motor (7041) arranged on the upper side of the hot water tank (1), a polygonal column (7042) arranged at one end of the output shaft of the second servo motor (7041) extending into the hot water tank (1), and a polygonal groove (7043) arranged on the upper side of the transmission shaft (702); the transmission shaft (702) is slidably sleeved on the polygonal column (7042) through the polygonal groove (7043).

9. The oven waste heat recovery device according to claim 1, characterized in that: The plurality of heat dissipation plates (2) are provided with through holes (10) corresponding to the heat dissipation pipes (4); the side of the hot water tank (1) is provided with two mounting holes (11); the heat dissipation pipes (4) are fixed in the through holes (10) and the two mounting holes (11).

10. The oven waste heat recovery device according to claim 1, characterized in that: The first end of the heat dissipation pipe (4) extends out of the hot water tank (1) and is connected to the first water tank (12); the upper side of the first water tank (12) is connected to a connecting pipe (13); the second end of the heat dissipation pipe (4) extends out of the hot water tank (1) and is sequentially connected to the second water tank (14) and an air suction fan (15); the sides of the first water tank (12) and the second water tank (14) are both connected to drainage valves; the upper side of the hot water tank (1) is connected to a water inlet valve (16); and the side of the hot water tank (1) is connected to a water outlet valve (17).

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