Flue gas waste heat recovery type energy-saving boiler

Abstract

The invention relates to the technical field of boilers, in particular to a flue gas waste heat recovery type energy-saving boiler which comprises a boiler body, a flow guide cylinder and a heat exchange kettle, the boiler body is fixedly connected with the flow guide cylinder and the heat exchange kettle, and the interiors of the boiler body, the flow guide cylinder and the heat exchange kettle are communicated. A second gear is rotationally connected into the heat exchange kettle and fixedly connected with a connecting plate and a circular ring, the circular ring is fixedly connected with a plurality of stirring blades, a guide pipe is fixedly connected to the surface of the guide cylinder, the guide pipe is wound and located in the heat exchange kettle, and the tail end of the guide pipe is fixedly connected with a booster pump and a spherical part. The sealing plywood is driven to rotate through the electric push rod, the rack and the adjusting gear, so that the circulation state is adjusted, the impeller is driven to rotate through smoke flowing, flowing of a heat exchange medium is improved, uneven local heat exchange is avoided, high-pressure conveying and uniform diffusion of the medium are achieved through combination of the booster pump and the spherical piece, and the waste heat contact range is enlarged; and the waste heat recovery effect is improved.

Description

Technical Field

[0001] This invention relates to the field of boiler technology, specifically to an energy-saving boiler with flue gas waste heat recovery. Background Technology

[0002] In the fields of industrial production and energy utilization, boilers are widely used as core thermal energy equipment, and they generate high-temperature flue gas during use.

[0003] In traditional boiler operation, high-temperature flue gas carries a large amount of waste heat and is directly discharged, which not only causes serious energy waste, but also aggravates environmental thermal pollution, which does not meet the development needs of energy conservation and emission reduction.

[0004] Currently, some flue gas waste heat recovery devices have dispersed structural designs and short heat exchange paths, making it difficult to fully utilize the heat energy in the flue gas. Therefore, this invention proposes a flue gas waste heat recovery type energy-saving boiler to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving boiler with flue gas waste heat recovery to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flue gas waste heat recovery type energy-saving boiler, comprising a boiler body, a guide tube, and a heat exchange vessel. The boiler body is fixedly connected to the guide tube and the heat exchange vessel, and the interiors of the three are interconnected. A gas guide hole is opened on the surface of the boiler body. A sealing plate is rotatably connected to the gas guide hole. A gear two is rotatably connected inside the heat exchange vessel. A connecting plate and a ring are fixedly connected to the gear two. Several stirring blades are fixedly connected to the ring. A guide tube is fixedly connected to the surface of the guide tube. The guide tube is wound around and located inside the heat exchange vessel. A booster pump and a spherical component are fixedly connected to the end of the guide tube.

[0007] Preferably, an electric push rod is fixedly connected to the upper surface of the boiler body, and a rack is fixedly connected to the output end of the electric push rod. The rack is slidably connected to the boiler body through a T-shaped protrusion, and an adjusting gear is engaged with the tooth surface of the rack. The adjusting gear is rotatably connected to the boiler body.

[0008] Preferably, the surface of the boiler body is provided with air guide holes, and the inner wall of the air guide holes is in close contact with a sealing plate. The sealing plate consists of three semi-circular sealing plates, and a connecting shaft is fixedly connected at the midpoint of the sealing plate. One end of the connecting shaft is rotatably connected to the boiler body, and the other end passes through the boiler body and is fixedly connected to the adjusting gear.

[0009] Preferably, a drain pipe is fixedly connected to the side of the boiler body, a guide tube is fixedly connected to the upper end of the boiler body, the guide tube is connected to the drain pipe, a connecting pipe is fixedly connected to the upper surface of the guide tube, a guide tube is fixedly connected to the lower surface of the guide tube, the other end of the guide tube is fixedly connected to and connected to the heat exchange vessel, and a valve is fixedly connected to the midpoint of the guide tube.

[0010] Preferably, the end of the connecting pipe away from the guide tube passes through the heat exchange vessel and is fixedly connected to a guide tube. An impeller is rotatably connected to the inner wall of the end of the connecting pipe located inside the heat exchange vessel. A gear one is fixedly connected to the outer wall of the impeller. Gear one meshes with gear two, and gear two is rotatably connected to the inner wall of the heat exchange vessel.

[0011] Preferably, a connecting plate is fixedly connected to the inner wall of the second gear, and a ring is fixedly connected to the surface of the connecting plate. The center of the ring and the midpoint of the connecting plate are located at the same point. A connecting column is fixedly connected to the lower end of the middle part of the connecting plate, and several fan blades are fixedly connected to the other end surface of the connecting column. Several stirring blades are fixedly connected to the lower side of the ring.

[0012] Preferably, the guide tube spirals downward toward the boiler body, and a booster pump is connected to the end of the guide tube and fixedly connected to its input end. A spherical component is fixedly connected to the output end of the booster pump, and several air holes are opened on the surface of the spherical component.

[0013] Preferably, the vertical projections of the booster pump and the spherical component are both located in the middle of the bottom of the heat exchange vessel, the vertical projection of the guide tube surrounds the spherical component, and the spherical component is located in the lower half of the interior of the heat exchange vessel.

[0014] Preferably, all of the fan blades are located directly above the spherical component, and the stirring blades are located around the spherical component, without contacting the guide tube or the spherical component.

[0015] Preferably, an exhaust pipe is fixedly connected to the upper end of the heat exchange vessel, and the second gear is located in the middle of the height direction of the heat exchange vessel.

[0016] This invention extends the heat exchange stroke by using a spiral guide tube to improve the efficiency of flue gas waste heat recovery. The sealing plate is driven to rotate by an electric push rod, rack and pinion and adjusting gear to adjust the flow state. The impeller is driven to rotate by the flue gas flow to improve the flow of heat exchange medium and avoid uneven local heat exchange. The combination of a booster pump and a spherical component realizes high-pressure delivery and uniform diffusion of the medium, expands the waste heat contact range and improves the waste heat recovery effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0019] Figure 3 For the present invention Figure 2 Enlarged view of the structure of region A in the middle;

[0020] Figure 4 For the present invention Figure 2 Enlarged view of the structure of region B in the middle;

[0021] Figure 5 This is a schematic diagram of the sealing plate structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the rack structure of the present invention.

[0023] In the diagram: 1. Boiler body; 2. Electric push rod; 3. Rack; 4. Adjusting gear; 5. Connecting shaft; 6. Sealing plate; 7. Air vent; 8. Drain pipe; 9. Valve; 10. Guide pipe; 11. Guide tube; 12. Connecting pipe; 13. Impeller; 14. Gear 1; 15. Gear 2; 16. Connecting plate; 17. Ring; 18. Agitator blade; 19. Connecting column; 20. Fan blade; 21. Guide tube; 22. Spherical component; 23. Heat exchange vessel; 24. Exhaust pipe; 25. Booster pump. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 3 The present invention provides a technical solution: a flue gas waste heat recovery type energy-saving boiler, including a boiler body 1, a guide tube 11 and a heat exchange vessel 23. The boiler body 1 is fixedly connected to the guide tube 11 and the heat exchange vessel 23 to ensure the stability of the overall structure. The three are internally connected to ensure smooth flow path of flue gas and heat exchange medium. The surface of the boiler body 1 is provided with a guide hole 7 to provide a channel for flue gas discharge and waste heat exchange. A sealing plate 6 is rotatably connected inside the guide hole 7 to realize the opening and closing of the guide hole 7.

[0026] An electric push rod 2 is fixedly connected to the upper surface of the boiler body 1, providing power for the adjustment of the sealing plate 6. A rack 3 is fixedly connected to the output end of the electric push rod 2. The rack 3 is slidably connected to the boiler body 1 through a T-shaped protrusion to ensure the stability of the rack 3. An adjusting gear 4 meshes with the teeth of the rack 3. The adjusting gear 4 is rotatably connected to the boiler body 1, providing support for its rotation. An air guide hole 7 is opened on the surface of the boiler body 1. The inner wall of the air guide hole 7 is in close contact with the sealing plate 6 to ensure the sealing performance when closed. The sealing plate 6 consists of three semi-circular sealing plates, which can realize the opening and closing adjustment of the air guide hole 7. A connecting shaft 5 is fixedly connected to the midpoint of the sealing plate 6. One end of the connecting shaft 5 is rotatably connected to the boiler body 1, and the other end passes through the boiler body 1 and is fixedly connected to the adjusting gear 4. When the adjusting gear 4 rotates, the sealing plate 6 rotates synchronously.

[0027] A drain pipe 8 is fixedly connected to the side of the boiler body 1 for discharging wastewater or circulating water from the boiler. A guide tube 11 is fixedly connected to the upper end of the boiler body 1, and the guide tube 11 is connected to the drain pipe 8 to allow the circulation of circulating water. A connecting pipe 12 is fixedly connected to the upper surface of the guide tube 11 to provide a channel for medium transportation. A guide pipe 10 is fixedly connected to the lower surface of the guide tube 11 to guide the medium to flow into the heat exchange vessel 23. The other end of the guide pipe 10 is fixedly connected to and connected to the heat exchange vessel 23 to ensure that the medium enters the heat exchange vessel 23 smoothly. A valve 9 is fixedly connected to the midpoint of the guide pipe 10 to control the opening and closing of the guide pipe 10 and to regulate the flow rate.

[0028] One end of the connecting pipe 12, away from the guide tube 11, passes through the heat exchange vessel 23 and is fixedly connected to the guide tube 21, enabling the medium to transition from the connecting pipe 12 to the guide tube 21. An impeller 13 is rotatably connected to the inner wall of the end of the connecting pipe 12 located inside the heat exchange vessel 23, and the impeller 13 is driven to rotate by the flow of the medium. A gear 14 is fixedly connected to the outer wall of the impeller 13, transmitting the rotational power of the impeller 13 to a gear 15. Gear 14 meshes with gear 15, achieving power transmission. Gear 15 is rotatably connected to the inner wall of the heat exchange vessel 23, ensuring stable rotation of gear 15.

[0029] A connecting plate 16 is fixedly connected to the inner wall of gear 2 15, providing an installation carrier for ring 17 and connecting column 19. Ring 17 is fixedly connected to the surface of connecting plate 16, serving as the installation base for stirring blade 18. The center of ring 17 and the midpoint of connecting plate 16 are located at the same point to ensure balanced force during stirring. Connecting column 19 is fixedly connected to the lower end of the middle part of connecting plate 16, providing fixed support for fan blade 20. Several fan blades 20 are fixedly connected to the other end surface of connecting column 19 to enhance the longitudinal flow of the medium in heat exchange vessel 23. Several stirring blades 18 are fixedly connected to the lower side of ring 17 to achieve transverse stirring and mixing of the medium.

[0030] The guide tube 21 spirals downward toward the boiler body 1 to maximize the use of the space inside the heat exchange vessel 23. The end of the guide tube 21 is connected to a booster pump 25 and is fixedly connected to its input end to increase the medium delivery pressure. The output end of the booster pump 25 is fixedly connected to a spherical component 22 to ensure that the medium is smoothly delivered from the guide tube 21 to the spherical component 22. Several air holes are opened on the surface of the spherical component 22 to achieve uniform spraying of the medium inside the heat exchange vessel 23.

[0031] The vertical projections of the booster pump 25 and the spherical component 22 are both located in the middle of the bottom of the heat exchange vessel 23, ensuring that the medium diffusion range covers the entire area of ​​the heat exchange vessel 23. The vertical projection of the guide pipe 21 surrounds the spherical component 22, making the guide pipe 21 and the spherical component 22 compact and reasonable. The spherical component 22 is located in the lower half of the heat exchange vessel 23, ensuring that the medium and the waste heat of the flue gas are in full contact. Several fan blades 20 are located directly above the spherical component 22, enhancing the longitudinal diffusion of the medium sprayed from the spherical component 22. The stirring blades 18 are located around the spherical component 22, realizing all-round stirring of the medium. The stirring blades 18 do not contact the guide pipe 21 and the spherical component 22.

[0032] The upper end of the heat exchange vessel 23 is fixedly connected to an exhaust pipe 24 for discharging the flue gas after heat exchange. Gear 25 is located in the middle of the height direction of the heat exchange vessel 23, so that the stirring mechanism can act on most of the medium area inside the heat exchange vessel 23.

[0033] When this device is working, the flue gas generated by combustion in the boiler body 1 activates the electric push rod 2, which drives the rack 3 to slide. Through the meshing adjusting gear 4, the connecting shaft 5 and the sealing plate 6 rotate, thereby adjusting the opening and closing of the air guide hole 7. This determines the opening and closing of each hole. The flue gas enters the guide tube 11 through the air guide hole 7, flows into the guide pipe 21 through the connecting pipe 12, and during the swirling flow in the heat exchange vessel 23, it transfers residual heat to the heat exchange medium in the heat exchange vessel 23. Finally, it is discharged from the pores on the surface of the spherical part 22 through the booster pump 25. At the same time, the flow of flue gas drives the impeller 13 to rotate. Through the meshing transmission of gear 14 and gear 25, it drives the connecting plate 16, the ring 17, the fan blade 20, and the agitator blade 18 to rotate. The fan blade 20 disperses the flue gas emitted from the spherical part 22, and the agitator blade 18 agitates the heat exchange medium, further improving the heat exchange efficiency. Finally, it is discharged through the exhaust pipe 24. Part of the medium in the guide tube 11 can flow into the heat exchange vessel 23 through the guide pipe 10 to replenish it. When it is necessary to replace the medium in the heat exchange vessel 23, rotate the sealing plate 6 to completely block the air guide hole, and then open the valve 9 to continue the discharge operation. The entire device realizes efficient recovery and utilization of flue gas waste heat, and the energy saving effect is significant.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving boiler with flue gas waste heat recovery, characterized in that: The boiler body (1), the guide tube (11) and the heat exchange vessel (23) are fixedly connected, and the interiors of the three are interconnected. The surface of the boiler body (1) is provided with a gas guide hole (7). A sealing plate (6) is rotatably connected inside the gas guide hole (7). A gear two (15) is rotatably connected inside the heat exchange vessel (23). A connecting plate (16) and a ring (17) are fixedly connected to the gear two (15). Several stirring blades (18) are fixedly connected to the ring (17). A guide tube (21) is fixedly connected to the surface of the guide tube (11). The guide tube (21) is wound around and located inside the heat exchange vessel (23). A booster pump (25) and a spherical part (22) are fixedly connected to the end of the guide tube (21).

2. The flue gas waste heat recovery type energy-saving boiler according to claim 1, characterized in that: An electric push rod (2) is fixedly connected to the upper surface of the boiler body (1). A rack (3) is fixedly connected to the output end of the electric push rod (2). The rack (3) is slidably connected to the boiler body (1) through a T-shaped protrusion. An adjusting gear (4) meshes with the tooth surface of the rack (3). The adjusting gear (4) is rotatably connected to the boiler body (1).

3. The flue gas waste heat recovery type energy-saving boiler according to claim 1, characterized in that: The surface of the boiler body (1) is provided with an air guide hole (7). The inner wall of the air guide hole (7) is in close contact with a sealing plate (6). The sealing plate (6) consists of three semi-circular sealing plates. A connecting shaft (5) is fixedly connected at the midpoint of the sealing plate (6). One end of the connecting shaft (5) is rotatably connected to the boiler body (1), and the other end passes through the boiler body (1) and is fixedly connected to the adjusting gear (4).

4. The waste heat recovery type energy-saving boiler according to claim 1, characterized in that: A drain pipe (8) is fixedly connected to the side of the boiler body (1), and a guide tube (11) is fixedly connected to the upper end of the boiler body (1). The guide tube (11) is connected to the drain pipe (8). A connecting pipe (12) is fixedly connected to the upper surface of the guide tube (11), and a guide tube (10) is fixedly connected to the lower surface of the guide tube (11). The other end of the guide tube (10) is fixedly connected to and connected to the heat exchange vessel (23). A valve (9) is fixedly connected to the midpoint of the guide tube (10).

5. The flue gas waste heat recovery type energy-saving boiler according to claim 4, characterized in that: The end of the connecting pipe (12) away from the guide tube (11) passes through the heat exchange vessel (23) and is fixedly connected to the guide tube (21). The inner wall of the end of the connecting pipe (12) located inside the heat exchange vessel (23) is rotatably connected to the impeller (13). The outer wall of the impeller (13) is fixedly connected to the gear one (14). The gear one (14) is meshed with the gear two (15). The gear two (15) is rotatably connected to the inner wall of the heat exchange vessel (23).

6. The flue gas waste heat recovery type energy-saving boiler according to claim 5, characterized in that: A connecting plate (16) is fixedly connected to the inner wall of the gear 2 (15). A ring (17) is fixedly connected to the surface of the connecting plate (16). The center of the ring (17) is located at the midpoint of the connecting plate (16). A connecting column (19) is fixedly connected to the lower end of the middle part of the connecting plate (16). Several fan blades (20) are fixedly connected to the other end of the connecting column (19). Several stirring blades (18) are fixedly connected to the lower side of the ring (17).

7. The flue gas waste heat recovery type energy-saving boiler according to claim 1, characterized in that: The guide tube (21) spirals downward toward the boiler body (1). The end of the guide tube (21) is connected to a booster pump (25) and is fixedly connected to its input end. The output end of the booster pump (25) is fixedly connected to a spherical part (22), and the surface of the spherical part (22) is provided with several air holes.

8. The flue gas waste heat recovery type energy-saving boiler according to claim 7, characterized in that: The vertical projections of the booster pump (25) and the spherical part (22) are both located in the middle of the bottom of the heat exchange vessel (23), and the vertical projection of the guide tube (21) surrounds the spherical part (22), which is located in the lower half of the heat exchange vessel (23).

9. The waste heat recovery type energy-saving boiler according to claim 1, characterized in that: Several of the fan blades (20) are located directly above the spherical part (22), and the stirring blade (18) is located around the spherical part (22). The stirring blade (18) does not contact the guide tube (21) and the spherical part (22).

10. The flue gas waste heat recovery type energy-saving boiler according to claim 1, characterized in that: The upper end of the heat exchange vessel (23) is fixedly connected to an exhaust pipe (24), and the second gear (15) is located in the middle of the height direction of the heat exchange vessel (23).

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