Heating furnace flue gas waste heat recycling device

Abstract

The invention discloses a heating furnace flue gas waste heat recycling device, and relates to the technical field of heating furnace waste heat recovery, the device comprises a water storage cylinder and a flue gas inlet pipe, the water storage cylinder is connected with an annular fence through a support, a rotating part is rotatably installed in the annular fence, and a plurality of gas inlet cavities are formed between the rotating part and the annular fence; one air inlet cavity is communicated with the smoke inlet pipe, heat exchange pieces are correspondingly arranged on the lower surfaces of the air inlet cavities, air inlet mechanisms are installed between the heat exchange pieces and the air inlet cavities, pressurization mechanisms used for blocking the air inlet mechanisms are installed on the heat exchange pieces, and air guide pieces enabling smoke to flow in one direction are installed between the adjacent heat exchange pieces. According to the flue gas waste heat recovery device, flue gas waste heat can be fully recovered conveniently, an additional power source is not needed in the recovery process, the overall energy recovery rate can be increased easily, in addition, water obtained after heat exchange can reach the high temperature conveniently, and the water can be directly used for industrial production subsequently.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery of heating furnaces, and in particular to a device for recovering and reusing waste heat from flue gas of heating furnaces. Background Art

[0002] The significance of waste heat recovery from heating furnace flue gas lies in significantly improving energy utilization efficiency, reducing energy consumption and production costs, while reducing environmental pollution and promoting sustainable industrial development by efficiently utilizing the heat energy in high-temperature flue gas emitted during industrial production.

[0003] Chinese patent publication number CN117190721B discloses a heat recovery device for flue gas from a heating furnace. The device uses the output end of a servo motor to drive a water outlet assembly and a sealing assembly to synchronously release flue gas and cold water intermittently. A fixed amount of flue gas remains for a long time, allowing a fixed amount of water to be sprayed into a fixed amount of flue gas for heat exchange. This results in long-term, full contact between the flue gas and cold water, resulting in heat exchange at a fixed ratio. However, this technical solution still has the following drawbacks: 1. Using a servo motor to drive the intermittent release of flue gas and cold water can improve the recovery of flue gas waste heat, but the operation of the servo motor consumes more electricity, thus affecting the overall energy recovery rate; 2. The temperature of the water discharged after the flue gas and cold water are exchanged in a fixed ratio is difficult to maintain a high temperature, which does not meet the operating temperature of industrial hot water and requires further heating treatment. Summary of the Invention

[0004] The present invention provides a device for recovering and reusing waste heat from flue gas of a heating furnace, which can solve the problems in the prior art of low overall energy recovery rate when recovering waste heat from flue gas of a heating furnace and difficulty in achieving a high water temperature of water after heat exchange.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A device for recovering and reusing waste heat from flue gas in a heating furnace comprises a water storage cylinder and a smoke inlet pipe, the water storage cylinder is connected to an annular enclosure by a bracket, a rotating part is rotatably installed in the annular enclosure, a plurality of air intake cavities are formed between the rotating part and the annular enclosure, and one of the air intake cavities is connected to the smoke inlet pipe, a heat exchanger is correspondingly arranged on the lower surface of the air intake cavity, an air intake mechanism is installed between the heat exchanger and the air intake cavity, and a booster mechanism for blocking the air intake mechanism is installed on the heat exchanger, an air guide for allowing the smoke to flow in one direction is installed between adjacent heat exchangers, a water stop ring with a notch for sealing the heat exchanger is installed in the water storage cylinder, a rotating mechanism is installed between the rotating part and the annular enclosure, and when the air intake mechanism is blocked, the rotating part is rotated unidirectionally and equidistantly by the rotating mechanism.

[0006] As a further solution of the present invention: the rotating part includes an upper annular plate, a lower annular plate, a partition and a rotating shaft, the upper annular plate and the lower annular plate are both rotatably connected to the annular enclosure, and the upper annular plate and the lower annular plate are coaxially connected through the rotating shaft, multiple partitions are distributed along the circumference of the rotating shaft, and the annular enclosure and the upper annular plate and the lower annular plate form a sealed cavity, and multiple air inlet cavities are formed by dividing the sealed cavity by the rotating shaft and multiple partitions.

[0007] As a further solution of the present invention: the heat exchange element includes a cylinder with an annular cavity, a jacket and an exhaust port with an exhaust valve, the cylinder is installed at the bottom of the lower annular plate, and the bottom opening of the cylinder is in contact with the upper surface of the water stop ring, the annular cavity is arranged in the side wall of the cylinder, the jacket is installed on the outside of the cylinder and is connected to the annular cavity, the jacket and the annular cavity are filled with gas, and the exhaust port is connected to a position near the top of the cylinder.

[0008] As a further solution of the present invention: the air intake mechanism includes a first L-shaped tube, a first piston cylinder, a first piston and a second L-shaped tube with a first one-way valve, the top end of the first L-shaped tube is connected to the air intake chamber, and the other end of the first L-shaped tube is connected to the first piston cylinder, one end of the second L-shaped tube is connected to the side of the first piston cylinder away from the first L-shaped tube, and the other end of the second L-shaped tube extends into the cylinder body, and the first piston is slidably arranged in the first piston cylinder.

[0009] As a further solution of the present invention: the boosting mechanism includes a second piston cylinder, a second piston, a lifting rod and a first spring, the second piston cylinder is connected and arranged at the top of the jacket, the second piston is slidably installed at the bottom end of the second piston cylinder, the bottom end of the lifting rod is connected to the second piston, and the top end of the lifting rod extends to the outside of the second piston cylinder and is connected to the bottom of the first piston, the bottom end of the first spring is connected to the top of the second piston cylinder, and the top end of the first spring is connected to the inner wall of the top end of the second piston cylinder.

[0010] As a further solution of the present invention: the air guide part includes a connecting pipe and a second one-way valve, the connecting pipe is arranged between the side walls of two adjacent cylinders near the top, the second one-way valve is installed on the connecting pipe, one end of the connecting pipe is connected to the inner cavity of one of the cylinders, and the other end of the connecting pipe is connected to the second L-shaped tube in the other cylinder.

[0011] As a further solution of the present invention: a water supply assembly is installed between the upper annular plate and the cylinder, and the water supply assembly includes a water storage chamber, a water inlet pipe and a downpipe with a solenoid valve. The water storage chamber is arranged in the upper annular plate, the downpipe is connected to the water storage chamber, and the bottom end of the downpipe passes through the lower annular plate and is connected to the top of the cylinder, and the water inlet pipe is rotated and connected to the top of the water storage chamber.

[0012] As a further solution of the present invention: the height of the first piston is greater than the inner diameters of the first L-shaped tube and the second L-shaped tube.

[0013] As a further solution of the present invention: the rotating mechanism includes a rotating ring, a fixed ring, a connecting plate, a second spring, a clamping block and a clamping groove. The rotating ring is coaxially connected to the top of the upper annular plate, the fixed ring is sleeved on the outside of the rotating ring, and the fixed ring is connected to the annular enclosure through the connecting plate. A plurality of the clamping grooves are equidistantly distributed along the circumference of the inner ring of the fixed ring. The outer ring of the rotating ring is provided with a groove corresponding to the clamping groove. The clamping block is slidably connected to the groove, and the clamping block is connected to the bottom of the groove through the second spring.

[0014] As a further solution of the present invention: the end of the clamping block located outside the clamping slot is provided with an arc surface structure, and when the second spring is not compressed, the clamping block extends into the corresponding clamping slot.

[0015] Beneficial effects of the present invention: 1. In the present invention, the smoke generated by the heating furnace is conveniently introduced into the corresponding air inlet cavity through the smoke inlet pipe, and the air inlet mechanism on the air inlet cavity is used to conveniently inject the smoke into the heat exchange element so as to fully contact the water inside the heat exchange element. The cold water in the heat exchange element is used to not only conveniently absorb the particulate impurities in the smoke, but also conveniently recover the residual heat of the smoke. The air guide member facilitates the unidirectional flow of the smoke through each heat exchange element, which not only facilitates the sufficient heat exchange and recovery of the residual heat of the smoke, but also enables the smoke to be fully washed with water, so that the smoke is not easily mixed with particulate impurities after it is finally discharged.

[0016] 2. In the present invention, the air intake mechanism is automatically cut off by the boosting mechanism. Since the water inside the heat exchanger that first contacts the flue gas is directly heated by the continuously discharged flue gas, the water inside the heat exchanger can continuously rise to a higher temperature. When the water temperature is high, the pressure of the boosting mechanism will increase, thereby generating power to cut off the air intake mechanism, causing the pressure in the corresponding air intake chamber to continue to increase. In conjunction with the rotating mechanism, it is convenient to drive the rotating member to rotate unidirectionally at a fixed angle, so that the positions of multiple heat exchangers can be switched in sequence, so that the water in each heat exchanger can be heated to a higher water temperature.

[0017] 3. In the present invention, when the rotating part is rotated by the rotating mechanism, the notch portion of the water stop ring is utilized to facilitate the automatic discharge of water with a higher temperature in the corresponding heating element into the water storage cylinder for collection, thereby realizing automatic discharge of hot water. The water supply component is utilized to facilitate timely replenishment of cold water after the hot water is discharged from the heat exchange element, thereby facilitating uninterrupted and continuous operation of the device and improving the recovery efficiency and effect of the flue gas waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional diagram of a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 2 This is a cross-sectional view of a device for recovering and reusing waste heat from flue gas from a heating furnace according to the present invention; Figure 3 This is a three-dimensional diagram of a heating furnace flue gas waste heat recovery and reuse device according to the present invention, with the water storage cylinder removed; Figure 4 It is a three-dimensional diagram of the connection part of multiple heat exchange components in a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 5 This is a perspective view of the exploded rotating parts of a device for recovering and reusing waste heat from flue gas in a heating furnace according to the present invention; Figure 6 This is a cross-sectional view of a heat exchange component in a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 7 This is a cross-sectional view of an air intake mechanism in a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 8 This is a cross-sectional view of a pressurizing mechanism in a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 9 This is a cross-sectional view of a water supply component in a device for recovering and reusing waste heat from flue gas of a heating furnace according to the present invention; Figure 10 The present invention is an exploded view of a rotating mechanism in a device for recovering and reusing waste heat from flue gas in a heating furnace.

[0020] In the figure: 100, water storage cylinder; 101, water stop ring; 102, rotating plate; 200, annular enclosure; 201, smoke inlet pipe; 300, rotating member; 301, upper annular plate; 302, lower annular plate; 303, partition; 304, rotating shaft; 400, heat exchange element; 401, annular cavity; 402, cylinder; 403, jacket; 404, exhaust valve; 405, exhaust port; 500, air intake mechanism; 501, first L-shaped tube; 502, first piston cylinder; 503, first piston; 504, second L-shaped tube; 505, first one-way valve; 600, boosting mechanism; 601, second piston cylinder; 602, second piston; 603, lifting rod; 604, first spring; 700, air guide; 701, connecting pipe; 702, second one-way valve; 800, rotating mechanism; 801, swivel; 802, fixing ring; 803, connecting plate; 804, second spring; 805, blocking block; 806, slot; 900, water supply assembly; 901, water storage chamber; 902, water inlet pipe; 903, solenoid valve; 904, downpipe. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] like Figures 1-10 As shown, the present invention is a device for recovering and reusing waste heat from flue gas in a heating furnace, comprising a water storage cylinder 100 and a smoke inlet pipe 201. The water storage cylinder 100 is connected to an annular enclosure 200 through a bracket. A rotating member 300 is rotatably installed in the annular enclosure 200. A plurality of air inlet cavities are formed between the rotating member 300 and the annular enclosure 200, and one of the air inlet cavities is connected to the smoke inlet pipe 201. A heat exchange member 400 is correspondingly arranged on the lower surface of the air inlet cavity. An air inlet is installed between the heat exchange member 400 and the air inlet cavity. Mechanism 500, and a booster mechanism 600 is installed on the heat exchanger 400 for blocking the air intake mechanism 500, an air guide 700 is installed between adjacent heat exchangers 400 to enable the smoke to flow in one direction, a water stop ring 101 with a notch and used to seal the heat exchanger 400 is installed in the water storage cylinder 100, and a rotating mechanism 800 is installed between the rotating member 300 and the annular enclosure 200. When the air intake mechanism 500 is blocked, the rotating member 300 is rotated unidirectionally and equidistantly through the rotating mechanism 800.

[0023] It should be noted that, when in use, the smoke generated by the heating furnace is introduced into the corresponding air inlet cavity by using the smoke inlet pipe 201, and the smoke is injected into the corresponding heat exchange element 400 by using the air inlet mechanism 500 on the air inlet cavity so as to fully contact the water inside the heat exchange element 400. The cold water in the heat exchange element 400 is not only convenient for absorbing particulate impurities in the smoke, but also convenient for recovering the residual heat of the smoke. The smoke is made to flow in one direction through each heat exchange element 400 by using the air guide 700, so that the residual heat of the smoke can be fully recovered. Since the water inside the heat exchange element 400 that first contacts the flue gas is directly heated by the continuously discharged flue gas, the water inside the heat exchange element 400 can continue to rise to a higher temperature. After the water temperature is high, the boosting mechanism 600 is used to cut off the air intake mechanism 500, resulting in an increase in the pressure in the corresponding air intake chamber. The rotating mechanism 800 can drive the rotating element 300 to rotate unidirectionally at a fixed angle, so that the positions of multiple heat exchange elements 400 can be switched in sequence, making it easier for the water in each heat exchange element 400 to be heated to a higher water temperature.

[0024] like Figure 1 and Figure 5 As shown, the rotating member 300 includes an upper annular plate 301, a lower annular plate 302, a partition 303 and a rotating shaft 304. The upper annular plate 301 and the lower annular plate 302 are both rotatably connected to the annular enclosure 200, and the upper annular plate 301 and the lower annular plate 302 are coaxially connected through the rotating shaft 304. Multiple partitions 303 are distributed circumferentially along the rotating shaft 304. A sealed cavity is enclosed between the annular enclosure 200 and the upper annular plate 301 and the lower annular plate 302. Multiple air inlet cavities are formed by dividing the sealed cavity by the rotating shaft 304 and multiple partitions 303.

[0025] It should be noted that the upper annular plate 301 and the lower annular plate 302 are both rotatably connected to the annular enclosure 200 via sealed bearings. In this embodiment, the number of partitions 303 is equal to the number of heat exchange elements 400, specifically six.

[0026] like Figure 4 and Figure 6 As shown, the heat exchange element 400 includes a cylinder 402 with an annular cavity 401, a jacket 403 and an exhaust port 405 with an exhaust valve 404. The cylinder 402 is installed at the bottom of the lower annular plate 302, and the bottom opening of the cylinder 402 is in contact with the upper surface of the water stop ring 101. The annular cavity 401 is arranged in the side wall of the cylinder 402, the jacket 403 is installed on the outside of the cylinder 402 and is connected to the annular cavity 401. The jacket 403 and the annular cavity 401 are filled with gas, and the exhaust port 405 is connected to the cylinder 402 near the top.

[0027] It should be noted that, in this embodiment, the exhaust valve 404 is an electrically controlled valve and is electrically connected to an external controller (not shown in the figure). When the flue gas flows through the initial heat exchange element 400 to the last heat exchange element 400, only the exhaust valve 404 on the last heat exchange element 400 is in an open state. That is to say, in the process of the flue gas flowing through multiple heat exchange elements 400 in sequence, only the exhaust valve 404 at the last position is open, and the rest are closed.

[0028] like Figure 4 and Figure 7 As shown, the air intake mechanism 500 includes a first L-shaped tube 501, a first piston cylinder 502, a first piston 503 and a second L-shaped tube 504 with a first one-way valve 505. The top end of the first L-shaped tube 501 is connected to the air intake chamber, and the other end of the first L-shaped tube 501 is connected to the first piston cylinder 502. One end of the second L-shaped tube 504 is connected to the side of the first piston cylinder 502 away from the first L-shaped tube 501, and the other end of the second L-shaped tube 504 extends into the cylinder body 402. The first piston 503 is slidably arranged in the first piston cylinder 502.

[0029] It should be noted that, in the initial state, the first piston 503 is located at a lower position between the first L-shaped tube 501 and the second L-shaped tube 504, so that the flue gas can enter the first piston cylinder 502 through the first L-shaped tube 501, and then be injected into the cylinder body 402 through the second L-shaped tube 504. In this embodiment, the first one-way valve 505 is arranged at a position close to the first piston cylinder 502. The first one-way valve 505 is used to prevent the flue gas entering the second L-shaped tube 504 through the air guide 700 from flowing back into the first L-shaped tube 501.

[0030] like Figure 4 and Figure 8As shown, the boosting mechanism 600 includes a second piston cylinder 601, a second piston 602, a lifting rod 603 and a first spring 604. The second piston cylinder 601 is connected and arranged at the top of the jacket 403. The second piston 602 is slidably installed at the bottom end of the second piston cylinder 601. The bottom end of the lifting rod 603 is connected to the second piston 602, and the top end of the lifting rod 603 extends to the outside of the second piston cylinder 601 and is connected to the bottom of the first piston 503. The bottom end of the first spring 604 is connected to the top of the second piston cylinder 601, and the top end of the first spring 604 is connected to the inner wall of the top end of the second piston cylinder 601.

[0031] It should be noted that when the water temperature in the cylinder 402 rises to a higher temperature, the gas in the annular cavity 401 and the jacket 403 will expand and increase in pressure. After the pressure increases, the second piston 602 will be pushed up along the second piston cylinder 601, thereby causing the lifting rod 603 to push the first piston 503 up synchronously. After the first piston 503 rises to its position, it is blocked between the first L-shaped tube 501 and the second L-shaped tube 504, so that the smoke can no longer flow through the cut-off air intake mechanism 500. When the water with a higher water temperature in the cylinder 402 is discharged, the pressure in the annular cavity 401 and the jacket 403 will gradually recover. Under the reset action of the first spring 604, the first piston 503 will be reset, thereby ensuring that the air intake mechanism 500 can automatically return to the conductive state.

[0032] like Figure 3-Figure 4 As shown, the air guide 700 includes a connecting tube 701 and a second one-way valve 702. The connecting tube 701 is arranged between the side walls of two adjacent cylinders 402 near the top, and the second one-way valve 702 is installed on the connecting tube 701. One end of the connecting tube 701 is connected to the inner cavity of one of the cylinders 402, and the other end of the connecting tube 701 is connected to the second L-shaped tube 504 in the other cylinder 402.

[0033] It should be noted that, in this embodiment, the maximum liquid level in the cylinder 402 is lower than the height of the connecting pipe 701. A liquid level sensor can be set in the cylinder 402 to cooperate with an external controller to control the liquid level in the cylinder 402 to be at a set height. This is a prior art and will not be elaborated on here. In the initial state, the flue gas injected into the cylinder 402 completes the heat exchange and is unidirectionally conducted to the second L-shaped tube 504 in the adjacent cylinder 402 through the connecting pipe 701, thereby facilitating the flue gas to continue to exchange heat with the water in the adjacent cylinder 402. In this cycle, the flue gas can flow through each cylinder 402, ensuring that the waste heat of the flue gas can be fully recovered.

[0034] like Figure 1 、 Figure 4 and Figure 9As shown, a water supply assembly 900 is installed between the upper annular plate 301 and the cylinder 402. The water supply assembly 900 includes a water storage chamber 901, a water inlet pipe 902, and a downpipe 904 with a solenoid valve 903. The water storage chamber 901 is arranged in the upper annular plate 301, and the downpipe 904 is connected to the water storage chamber 901. The bottom end of the downpipe 904 passes through the lower annular plate 302 and is connected to the top of the cylinder 402. The water inlet pipe 902 rotates and is connected to the top of the water storage chamber 901.

[0035] It should be noted that, in this embodiment, one end of the water inlet pipe 902 away from the water storage chamber 901 is connected to an external water source, thereby facilitating the guidance of water into the water storage chamber 901. When the rotating member 300 rotates, the cylinder 402 that first exchanges heat is separated from the water stop ring 101, so that the higher-temperature water in the cylinder 402 can be quickly discharged into the water storage cylinder 100. In order to reduce the heat loss of the hot water in the water storage cylinder 100, in this embodiment, a rotating plate 102 is commonly provided on the multiple cylinders 402, and the rotating plate 102 is rotatably connected to the water storage cylinder 100. In addition, a filter can be provided in the water storage cylinder 100 to facilitate filtering impurity particles in the hot water. The filtered hot water can be directly used in industrial production. A liquid level sensor is set in the cylinder 402. When it detects that the hot water inside is drained, the bottom of the cylinder 402 is again fitted with the water stop ring 101 to form a closed space. The controller controls the solenoid valve 903 on the downpipe 904 connected to the cylinder 402 to open, so that automatic replenishment of cold water can be achieved. After the liquid level is replenished to the set level, the solenoid valve 903 is controlled to close and the water replenishment can be stopped.

[0036] like Figure 7 As shown, the height of the first piston 503 is greater than the inner diameters of the first L-shaped tube 501 and the second L-shaped tube 504 .

[0037] It should be noted that it is necessary to ensure that the first piston 503 can effectively block the first L-shaped tube 501 and the second L-shaped tube 504 after being lifted into place.

[0038] like Figure 2 and Figure 10 As shown, the rotating mechanism 800 includes a rotating ring 801, a fixed ring 802, a connecting plate 803, a second spring 804, a clamping block 805 and a clamping groove 806. The rotating ring 801 is coaxially connected to the top of the upper annular plate 301, the fixed ring 802 is sleeved on the outside of the rotating ring 801, and the fixed ring 802 is connected to the annular enclosure 200 through the connecting plate 803. A plurality of clamping grooves 806 are equidistantly distributed along the circumference of the inner ring of the fixed ring 802. The outer ring of the rotating ring 801 is provided with a groove corresponding to the clamping groove 806. The clamping block 805 is slidably connected to the groove, and the clamping block 805 is connected to the bottom of the groove through the second spring 804.

[0039] It should be noted that, in this embodiment, the angle between adjacent slots 806 is equal to the angle between two adjacent cylinders 402 , that is, when the rotating ring 801 rotates to drive the block 805 to engage in the adjacent slot 806 , a position switch is completed between each cylinder 402 .

[0040] like Figure 10 As shown, the end of the clamping block 805 located outside the clamping slot 806 is configured as an arc surface structure. When the second spring 804 is not compressed, the clamping block 805 extends into the corresponding clamping slot 806 .

[0041] It should be noted that the end of the clamping block 805 is configured as an arc surface structure to facilitate one-way rotation. In addition, in this embodiment, the rotating ring 801 and the fixed ring 802 are rotatably connected via a one-way bearing.

[0042] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A device for recovering and reusing waste heat from flue gas of a heating furnace, comprising a water storage cylinder (100) and a flue gas inlet pipe (201), characterized in that: The water storage cylinder (100) is connected to an annular enclosure (200) via a bracket, a rotating member (300) is rotatably installed in the annular enclosure (200), a plurality of air intake cavities are formed between the rotating member (300) and the annular enclosure (200), and one of the air intake cavities is communicated with the smoke inlet pipe (201), a heat exchange member (400) is correspondingly provided on the lower surface of the air intake cavity, an air intake mechanism (500) is installed between the heat exchange member (400) and the air intake cavity, and a member for blocking the heat exchange member (400) is installed on the heat exchange member (400). The boost mechanism (600) of the air intake mechanism (500) is provided with an air guide member (700) for enabling the smoke to flow in one direction, and is installed between adjacent heat exchange members (400). A water stop ring (101) with a notch for sealing the heat exchange member (400) is installed in the water storage cylinder (100). A rotating mechanism (800) is installed between the rotating member (300) and the annular enclosure (200). When the air intake mechanism (500) is blocked, the rotating member (300) is caused to rotate in one direction and at equal distances by the rotating mechanism (800).

2. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 1, characterized in that: The rotating member (300) comprises an upper annular plate (301), a lower annular plate (302), a partition (303) and a rotating shaft (304); the upper annular plate (301) and the lower annular plate (302) are both rotatably connected to the annular enclosure (200); the upper annular plate (301) and the lower annular plate (302) are coaxially connected via the rotating shaft (304); a plurality of the partitions (303) are circumferentially distributed along the rotating shaft (304); a sealed cavity is enclosed between the annular enclosure (200), the upper annular plate (301) and the lower annular plate (302); and a plurality of the air inlet cavities are formed by dividing the sealed cavity by the rotating shaft (304) and the plurality of partitions (303).

3. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 2, characterized in that: The heat exchange element (400) includes a cylinder (402) with an annular cavity (401), a jacket (403), and an exhaust port (405) with an exhaust valve (404). The cylinder (402) is installed at the bottom of the lower annular plate (302), and the bottom opening of the cylinder (402) is in contact with the upper surface of the water stop ring (101). The annular cavity (401) is arranged in the side wall of the cylinder (402). The jacket (403) is installed on the outside of the cylinder (402) and is connected to the annular cavity (401). The jacket (403) and the annular cavity (401) are filled with gas. The exhaust port (405) is connected to a position near the top of the cylinder (402).

4. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 3, characterized in that: The air intake mechanism (500) comprises a first L-shaped tube (501), a first piston cylinder (502), a first piston (503), and a second L-shaped tube (504) with a first one-way valve (505), wherein the top end of the first L-shaped tube (501) is connected to the air intake chamber, and the other end of the first L-shaped tube (501) is connected to the first piston cylinder (502), one end of the second L-shaped tube (504) is connected to a side of the first piston cylinder (502) away from the first L-shaped tube (501), and the other end of the second L-shaped tube (504) extends into the cylinder body (402), and the first piston (503) is slidably arranged in the first piston cylinder (502).

5. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 4, characterized in that: The boosting mechanism (600) includes a second piston cylinder (601), a second piston (602), a lifting rod (603) and a first spring (604), wherein the second piston cylinder (601) is connected to the top of the jacket (403), and the second piston (602) is slidably installed at the bottom end of the second piston cylinder (601), the bottom end of the lifting rod (603) is connected to the second piston (602), and the top end of the lifting rod (603) extends to the outside of the second piston cylinder (601) and is connected to the bottom of the first piston (503), the bottom end of the first spring (604) is connected to the top of the second piston cylinder (601), and the top end of the first spring (604) is connected to the inner wall of the top end of the second piston cylinder (601).

6. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 4, characterized in that: The air guide (700) comprises a connecting pipe (701) and a second one-way valve (702). The connecting pipe (701) is arranged between the side walls of two adjacent cylinders (402) near the top end. The second one-way valve (702) is installed on the connecting pipe (701). One end of the connecting pipe (701) is connected to the inner cavity of one of the cylinders (402), and the other end of the connecting pipe (701) is connected to the second L-shaped pipe (504) in the other cylinder (402).

7. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 3, characterized in that: A water supply assembly (900) is installed between the upper annular plate (301) and the cylinder (402). The water supply assembly (900) comprises a water storage chamber (901), a water inlet pipe (902), and a downpipe (904) with a solenoid valve (903). The water storage chamber (901) is arranged in the upper annular plate (301). The downpipe (904) is connected to the water storage chamber (901), and the bottom end of the downpipe (904) passes through the lower annular plate (302) and is connected to the top of the cylinder (402). The water inlet pipe (902) is rotatably connected to the top of the water storage chamber (901).

8. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 4, characterized in that: The height of the first piston (503) is greater than the inner diameters of the first L-shaped tube (501) and the second L-shaped tube (504).

9. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 2, characterized in that: The rotating mechanism (800) comprises a rotating ring (801), a fixed ring (802), a connecting plate (803), a second spring (804), a clamping block (805) and a clamping groove (806); the rotating ring (801) is coaxially connected to the top of the upper annular plate (301); the fixed ring (802) is sleeved on the outside of the rotating ring (801), and the fixed ring (802) is connected to the annular enclosure (200) through the connecting plate (803); a plurality of the clamping grooves (806) are equidistantly distributed along the circumference of the inner ring of the fixed ring (802); the outer ring of the rotating ring (801) is provided with a groove corresponding to the clamping groove (806); the clamping block (805) is slidably connected to the groove, and the clamping block (805) is connected to the bottom of the groove through the second spring (804).

10. The device for recovering and reusing waste heat from flue gas from a heating furnace according to claim 9, characterized in that: The end portion of the clamping block (805) located outside the clamping slot (806) is provided with an arcuate structure, and when the second spring (804) is not compressed, the clamping block (805) extends into the corresponding clamping slot (806).

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