Heating stove capable of recycling heat energy of flue gas

Abstract

The utility model relates to the technical field of heating stoves, in particular to a heating stove capable of recycling smoke heat energy, which comprises a stove body, a second chimney pipe is mounted on the rear side of the upper end face of the stove body, a heat absorption smoke pipe is inserted on the second chimney pipe, and a plurality of groups of circular heating wing plates with cavity structures are uniformly and fixedly arranged on the annular surface of the heat absorption smoke pipe. Heat storage filler is arranged in the heat absorption smoke pipe, the upper side and the lower side of the heat storage filler are fixed through supporting plates, a plurality of sets of communicated through holes are formed in the heat storage filler and the supporting plates, the heat supply wing plates are filled with the heat storage filler, and the heat storage filler is connected with the heat storage filler in the heat absorption smoke pipe. According to the flue gas heat energy recycling device, heat energy in flue gas exhausted by the heating stove can be efficiently recycled and converted into heat capable of being used by the heating stove, and by optimizing the structure and layout of the flue gas heat energy recycling device, the heat energy is fully utilized, heat loss is reduced, the heat efficiency of the heating stove is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, and more specifically, to a heating furnace that can recover heat energy from flue gas. Background Technology

[0002] A heating boiler, also known as a heating stove or heating furnace, is a device specifically designed to provide warmth to homes, offices, or other buildings. A heating boiler generates heat by burning fuels (such as natural gas, liquefied petroleum gas, coal, wood, etc.), and this heat is then transferred to the heating system via a heat exchanger. The heating system then distributes the heat to the various rooms of the building, thus achieving the purpose of heating.

[0003] Heating boilers generate large amounts of high-temperature flue gas during operation, which contains a significant amount of heat energy. However, these boilers often directly release this flue gas into the atmosphere, resulting in a substantial waste of heat energy. Therefore, how to effectively recover and utilize the heat energy in the flue gas emitted by heating boilers has become an urgent problem to be solved. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a heating furnace capable of recovering flue gas heat energy, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A heating furnace capable of recovering flue gas heat energy includes a furnace body, a furnace door on the front side of the furnace body, an air damper on the furnace door, an ash drawer installed on the lower side of the interior of the furnace body, the bottom of the furnace body supported by multiple sets of legs, a second chimney pipe installed on the rear side of the upper end face of the furnace body, a heat-absorbing flue pipe inserted into the second chimney pipe, multiple sets of hollow circular heating wing plates evenly fixed on the annular surface of the heat-absorbing flue pipe, heat storage filler inside the heat-absorbing flue pipe, the heat storage filler fixed on the upper and lower sides by support plates, multiple sets of interconnected through holes opened in the heat storage filler and the support plates, the heat storage filler inside the heating wing plates is filled with heat storage filler and the heat storage filler is connected to the heat storage filler inside the heat-absorbing flue pipe, and a first chimney pipe with the same specifications as the second chimney pipe is connected to the upper end of the heat-absorbing flue pipe.

[0007] Furthermore, limiting baffles are fixedly provided on the annular surface of the heat-absorbing flue near both the upper and lower ends, and the diameter of the limiting baffles is larger than the diameter of the first chimney pipe.

[0008] Furthermore, a flue gas return pipe is connected to the left side of the heat absorption flue pipe, the left end of the flue gas return pipe extends into the furnace body, a conical guide head is installed at the end of the flue gas return pipe, and a regulating valve is installed on the flue gas return pipe.

[0009] Furthermore, a smoke guide plate with a left-high-right-low inclined structure is fixed on the left side of the inner wall of the heat absorption flue, and the smoke guide plate is located on the upper side of the connection between the flue gas return pipe and the heat absorption flue.

[0010] Furthermore, the upper end of the first chimney pipe is covered with a conical connecting cover, the upper side of which is connected to a flue gas inlet pipe, a water tank is provided on the rear side of the furnace body, the right end of the flue gas inlet pipe extends into the water tank near the bottom, and a flue gas exhaust pipe is connected to the right side of the upper surface of the water tank.

[0011] Furthermore, a water inlet is provided on the upper side of the water tank, and a drain valve is provided on the right end face of the water tank near the bottom.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model can efficiently recover the heat energy in the flue gas discharged from the heating furnace and convert it into heat that can be used by the heating furnace. By optimizing the structure and layout of the flue gas heat energy recovery device, the full utilization of heat energy is achieved, heat loss is reduced, the thermal efficiency of the heating furnace is improved, and energy consumption is reduced.

[0014] 2. In this utility model, the heat-absorbing flue is equipped with heat-storing filler inside. The heat-storing filler has good heat storage and thermal conductivity, and can absorb and store the heat energy in the flue gas. At the same time, through the design of the heat-absorbing flue and the heating wing plate, the flue gas can fully contact the heat-storing filler during the discharge process, realizing the efficient recovery of heat energy in the flue gas, reducing the waste of heat energy in the flue gas, and improving heating efficiency.

[0015] 3. In this utility model, a flue gas return pipe is connected to the left side of the heat-absorbing flue pipe. The left end of the flue gas return pipe extends into the furnace body. This flue gas return pipe allows some flue gas to flow back into the furnace body for secondary combustion, further heating the furnace body and improving the thermal efficiency of the heating furnace. This achieves flue gas recirculation and utilization. Simultaneously, because the heat energy in the flue gas is utilized more fully, it also reduces the environmental pollution caused by flue gas emissions. A conical guide head is installed at the end of the flue gas return pipe. The conical design of the guide head helps reduce resistance during flue gas return, allowing the flue gas to enter the furnace body more smoothly. The guide head also guides the direction of flue gas flow, ensuring that the flue gas is evenly distributed inside the furnace body. A regulating valve is installed on the flue gas return pipe, allowing the user to adjust the amount of flue gas return according to actual needs.

[0016] 4. This utility model, through the set smoke inlet pipe, can guide the flue gas into the water tank and make full contact with the water in the tank. The water filters out the solid impurities in the flue gas, reducing the impurity content in the flue gas and thus reducing the pollution of the environment caused by flue gas emissions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0019] Figure 3 This is the right view of the present invention.

[0020] Figure 4 This is a partial structural schematic diagram of the present invention.

[0021] Figure 5 This is a partial disassembly diagram of the present invention.

[0022] Figure 6 This is a partial sectional view of the present invention.

[0023] In the diagram: 1. Furnace body; 2. Furnace door; 3. Air damper; 4. Ash drawer; 5. Support leg; 6. Water tank; 7. Exhaust pipe; 8. Inlet pipe; 9. Flue gas return pipe; 10. Drain valve; 11. Water inlet; 12. Connecting cover; 13. First chimney pipe; 14. Heating wing plate; 15. Regulating valve; 16. Guide head; 17. Heat absorption pipe; 18. Second chimney pipe; 19. Limiting baffle; 20. Support plate; 21. Heat storage packing; 22. Through hole; 23. Smoke guide plate. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] Example:

[0026] like Figures 1 to 6As shown, a flue gas heat recovery heating furnace includes a furnace body 1. A furnace door 2 is located on the front side of the furnace body 1 for adding fuel. A damper 3 is located on the furnace door 2 to regulate the amount of air entering the furnace during combustion. An ash drawer 4 is installed on the lower side of the furnace body 1 for collecting and processing the ash produced during combustion. The bottom of the furnace body 1 is supported by multiple sets of feet 5 to ensure the stability and safety of the heating furnace, and also to facilitate ventilation and heat dissipation at the bottom of the furnace body 1. A second chimney pipe 18 is installed on the rear side of the upper end face of the furnace body 1. A heat-absorbing flue pipe 17 is inserted into the second chimney pipe 18. The second chimney pipe 18 and the heat-absorbing flue pipe 17 are used to guide the flue gas out of the furnace body 1. Multiple sets of hollow circular heating fins 14 are evenly fixed on the circumferential surface of the heat-absorbing flue pipe 17. The heating fins 14 can dissipate the absorbed heat into the surrounding air, improving the heating effect and increasing the heat exchange area, thus improving the heat recovery efficiency. The unit is equipped with heat storage packing 21, which has good heat storage and thermal conductivity, and can absorb and store the heat energy in the flue gas. The heat storage packing 21 is fixed on the upper and lower sides by support plates 20. Multiple sets of interconnected through holes 22 are opened inside the heat storage packing 21 and the support plates 20 to facilitate the circulation of flue gas and the transfer of heat. The heating wing plate 14 is filled with heat storage packing 21, and the heat storage packing 21 is connected to the heat storage packing 21 inside the heat absorption flue pipe 17. The upper end of the heat absorption flue pipe 17 is connected to a first chimney pipe 13 with the same specifications as the second chimney pipe 18. Through the design of the heat absorption flue pipe 17 and the heating wing plate 14, the flue gas can fully contact the heat storage packing 21 during the discharge process, realizing the efficient recovery of heat energy in the flue gas, reducing the waste of heat energy in the flue gas, and improving the heating efficiency. This design solves the problem that heating furnaces often directly discharge these flue gases into the atmosphere, causing a great waste of heat energy.

[0027] In this embodiment, limiting baffles 19 are fixedly provided on both the upper and lower ends of the annular surface of the heat-absorbing flue 17, and the diameter of the limiting baffles 19 is larger than the diameter of the first chimney pipe 13. The design of the limiting baffles 19 can effectively prevent the heat-absorbing flue 17 from falling out of the second chimney pipe 18 or the first chimney pipe 13, ensuring the installation stability of the heat-absorbing flue 17. Since the diameter of the limiting baffles 19 is larger than the diameter of the first chimney pipe 13, when the heat-absorbing flue 17 is inserted into the chimney pipe, the limiting baffles 19 will contact the chimney pipe, playing a role in fixing and supporting it. At the same time, by ensuring close contact between the limiting baffles 19 and the chimney pipe, it helps to improve the sealing between the chimney pipe and the heat-absorbing flue 17, which can reduce the possibility of flue gas leakage from gaps and improve the thermal efficiency of the heating boiler.

[0028] In this embodiment, a flue gas return pipe 9 is connected to the left side of the annular surface of the heat-absorbing flue pipe 17. The left end of the flue gas return pipe 9 extends into the furnace body 1. Through the flue gas return pipe 9, a portion of the flue gas can flow back into the furnace body 1 for secondary combustion, further heating the furnace body 1 and improving the thermal efficiency of the heating furnace. This achieves the recirculation and utilization of flue gas. Simultaneously, because the heat energy in the flue gas is utilized more fully, the pollution caused by flue gas emissions is reduced. A conical guide head 16 is installed at the end of the flue gas return pipe 9. The conical design of the guide head 16 helps reduce resistance during flue gas return, allowing the flue gas to enter the furnace body 1 more smoothly. At the same time, the guide head 16 also guides the direction of flue gas flow, ensuring that the flue gas is evenly distributed inside the furnace body 1. A regulating valve 15 is installed on the flue gas return pipe 9. The design of the regulating valve 15 allows the user to adjust the amount of flue gas return according to actual needs.

[0029] In this embodiment, a smoke guide plate 23 with a left-high, right-low inclined structure is fixedly provided on the left side of the inner wall of the heat absorption flue 17, and the smoke guide plate 23 is located above the connection between the flue gas return pipe 9 and the heat absorption flue 17. By setting the inclined structure of the smoke guide plate 23, it is helpful to guide the flow of flue gas, and can effectively guide part of the flue gas from the heat absorption flue 17 into the flue gas return pipe 9.

[0030] In this embodiment, a conical connecting cover 12 is provided at the upper end of the first chimney pipe 13. An inlet pipe 8 is connected to the upper side of the connecting cover 12. A water tank 6 is located at the rear of the furnace body 1, and the water tank 6 is filled with water. The right end of the inlet pipe 8 extends into the water tank 6 near the bottom. An exhaust pipe 7 is connected to the right side of the upper surface of the water tank 6. This design guides the flue gas into the water tank 6 through the inlet pipe 8, ensuring full contact with the water in the tank. The water filters out solid impurities in the flue gas, reducing the impurity content and thus reducing environmental pollution from flue gas emissions.

[0031] In this embodiment, a water inlet 11 is provided on the upper side of the water tank 6 to facilitate the user to add water to the water tank 6. A drain valve 10 is provided on the right end face of the water tank 6 near the bottom to facilitate the periodic discharge of dirt and sediment in the water tank 6 and to achieve the cleaning of the water tank 6.

[0032] The working principle of this type of heating furnace that can recover heat energy from flue gas:

[0033] In actual use, water is first added to the water tank 6 through the water inlet 11, and then fuel, such as wood or coal, is added to the furnace body 1 through the furnace door 2. After the fuel is ignited, combustion begins inside the furnace body 1, generating flue gas and heat. The damper 3 is used to regulate the amount of air entering the furnace during combustion to control the combustion speed and flue gas temperature. The flue gas generated by combustion rises and enters the second chimney pipe 18, passing through the heat-absorbing flue pipe 17 inserted therein. The heat-absorbing flue pipe 17 is equipped with heat-storage packing 21, which has good heat storage and thermal conductivity, and can absorb and store the heat energy in the flue gas. When the flue gas flows in the heat-absorbing flue pipe 17, it comes into full contact with the heat-storage packing 21, achieving efficient recovery of heat energy in the flue gas. Multiple sets of hollow circular heating wing plates 14 are uniformly fixed on the annular surface of the heat-absorbing flue pipe 17. These wing plates can absorb heat from the flue gas and dissipate it into the surrounding air, improving the heating effect.

[0034] The left side of the circumferential surface of the heat-absorbing flue pipe 17 is connected to the flue gas return pipe 9. Part of the flue gas flows back into the furnace body 1 through the flue gas return pipe 9 for secondary combustion. The returned flue gas can further heat the furnace body 1, improve the thermal efficiency of the heating furnace, realize the recirculation and utilization of flue gas, and at the same time, because the heat energy in the flue gas is utilized more fully, the pollution of the environment caused by flue gas emissions is also reduced.

[0035] After being processed by the heat-absorbing flue pipe 17 and the heating wing plate 14, the flue gas continues to rise into the first chimney and is then guided into the water tank 6 through the flue gas inlet pipe 8. The flue gas comes into full contact with the water in the water tank 6, and the solid impurities in the water filter out some of the impurities in the flue gas. The filtered flue gas is then discharged into the atmosphere through the flue gas outlet pipe 7, reducing the pollution of the environment caused by flue gas emissions.

[0036] In summary, this flue gas heat recovery boiler, through the design of heat-absorbing flue pipe 17, heating wing plate 14, heat storage packing 21, flue gas return pipe 9, water tank 6, etc., achieves efficient recovery and utilization of heat energy in flue gas, reduces heat energy waste and environmental pollution, and improves heating efficiency.

[0037] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A heating stove capable of recovering flue gas heat energy, comprising a stove body (1), a stove door (2) provided on the front side of the stove body (1), an air damper (3) provided on the stove door (2), an ash drawer (4) installed on the lower side of the interior of the stove body (1), and the bottom of the stove body (1) supported by multiple sets of legs (5), characterized in that: A second chimney pipe (18) is installed on the rear side of the upper end face of the furnace body (1). A heat-absorbing flue pipe (17) is inserted into the second chimney pipe (18). Multiple sets of hollow circular heating wing plates (14) are uniformly fixed on the annular surface of the heat-absorbing flue pipe (17). A heat-storage filler (21) is provided inside the heat-absorbing flue pipe (17). The heat-storage filler (21) is fixed on the upper and lower sides by a support plate (20). Multiple sets of interconnected through holes (22) are opened inside the heat-storage filler (21) and the support plate (20). The heat-storage wing plate (14) is filled with heat-storage filler (21), and the heat-storage filler (21) is connected to the heat-storage filler (21) inside the heat-absorbing flue pipe (17). A first chimney pipe (13) with the same specifications as the second chimney pipe (18) is connected to the upper end of the heat-absorbing flue pipe (17).

2. The heating boiler capable of recovering flue gas heat energy according to claim 1, characterized in that: The heat-absorbing flue (17) has a limiting baffle (19) fixed near both the upper and lower ends of its annular surface, and the diameter of the limiting baffle (19) is larger than the diameter of the first chimney pipe (13).

3. The heating boiler capable of recovering flue gas heat energy according to claim 1, characterized in that: The heat-absorbing flue pipe (17) is connected to a flue gas return pipe (9) on the left side of its annular surface. The left end of the flue gas return pipe (9) extends into the furnace body (1). A conical guide head (16) is installed at the end of the flue gas return pipe (9). A regulating valve (15) is installed on the flue gas return pipe (9).

4. The heating boiler capable of recovering flue gas heat energy according to claim 3, characterized in that: The heat-absorbing flue pipe (17) has a left-high and right-low inclined guide plate (23) fixed on the left side of its inner wall, and the guide plate (23) is located on the upper side of the connection between the flue gas return pipe (9) and the heat-absorbing flue pipe (17).

5. The heating boiler capable of recovering flue gas heat energy according to claim 1, characterized in that: The first chimney pipe (13) is covered with a conical connecting cover (12) at the upper end. The connecting cover (12) is connected to the upper side of the smoke inlet pipe (8). The furnace body (1) is provided with a water tank (6) at the rear side. The right end of the smoke inlet pipe (8) extends into the water tank (6) near the bottom. The upper surface of the water tank (6) is connected to the right side of the exhaust pipe (7).

6. The heating boiler capable of recovering flue gas heat energy according to claim 5, characterized in that: The water tank (6) is provided with a water inlet (11) on the upper side, and a drain valve (10) is provided on the right end face of the water tank (6) near the bottom.

Images