Self-cleaning efficient waste heat recovery furnace
By designing a self-cleaning, high-efficiency waste heat recovery furnace, the automatic cleaning of the chimney wall and the recovery of flue gas heat are achieved using natural wind and a blower. This solves the problems of low flue gas heat utilization and inconvenient smoke and dust cleaning in traditional heating furnaces, and improves heat recovery and combustion efficiency.
Patent Information
- Application Number
- CN202520493125.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Traditional heating boilers have low flue gas heat utilization efficiency, and soot accumulates on the inner wall of the chimney, making it difficult and unsafe to clean.
Design a self-cleaning, high-efficiency waste heat recovery furnace that uses natural wind to drive a rotating shaft and scraper to automatically clean the smoke and dust inside the chimney, and uses a blower to create negative pressure to recover heat from the flue gas, thereby aiding combustion and improving combustion efficiency.
It enables automatic cleaning of the chimney's inner wall, improves heat recovery and utilization rate and combustion efficiency, and reduces operating costs and operational hazards.
Smart Images
Figure CN223909565U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the production technical field of heating stove, specifically point to a kind of self-cleaning high-efficiency waste heat recovery furnace. BACKGROUND
[0002] The flue gas generated when heating stove burns contains a large amount of heat energy, and the traditional heating stove has low utilization rate of this part of heat, and the inner wall of the chimney will adhere to a large amount of soot after use, which will accumulate into blocks if not cleaned for a long time, making it difficult to clean and reducing heat transfer efficiency and increasing the burden on the chimney. Therefore, the soot needs to be cleaned regularly, but the existing cleaning method requires manual cleaning, which is inconvenient and unsafe to operate. SUMMARY
[0003] The utility model provides a kind of self-cleaning high-efficiency waste heat recovery furnace to solve the technical problems of the prior art, which can recycle heat in flue gas and automatically clean soot on the inner wall of the chimney, thereby improving heat transfer efficiency and making cleaning easy.
[0004] The utility model is realized by the following technical scheme, a kind of self-cleaning high-efficiency waste heat recovery furnace, including furnace body, the furnace body is equipped with combustion chamber, the bottom of combustion chamber is equipped with discharge port, the lower portion of discharge port is equipped with residue collection drawer, the furnace body is also equipped with flue with the upper portion of combustion chamber is communicated, the lower end of flue is communicated with residue collection drawer, the upper end of flue extends to the outside of furnace body and is fixedly connected with the vertically extending flue gas exhaust pipe, the rotating shaft is rotatably connected in the flue gas exhaust pipe, the rotating shaft and flue gas exhaust pipe are coaxially arranged, the outer wall of rotating shaft is fixedly connected with the scraper in contact with the inner wall of flue gas exhaust pipe, the upper end of rotating shaft extends to the outside of flue gas exhaust pipe and is fixedly connected with multiple fan blades, multiple fan blades are evenly distributed along the circumference of rotating shaft.
[0005] The flue gas generated by combustion in the combustion chamber flows upward through the flue into the flue gas exhaust pipe and is discharged to the outside through the flue gas exhaust pipe. Since the fan blades at the upper end of the rotating shaft in the flue gas exhaust pipe are located outside the flue gas exhaust pipe, they can be blown by the wind outside when the wind blows, which can drive the rotation of the rotating shaft, so that the scraper rotates to scrape the inner wall of the flue gas exhaust pipe, thereby cleaning the soot on the inner wall of the flue gas exhaust pipe, reducing the burden on the chimney, and improving the heat transfer efficiency of the flue gas exhaust pipe. Since the lower end of the flue is communicated with the residue collection drawer, the cleaned soot can be directly collected and treated in the residue collection drawer, which is convenient to use. Moreover, the rotating shaft is driven to rotate by natural wind in this scheme, which realizes automatic cleaning without the need for an electric unit, saves energy, and reduces the cost of use.
[0006] As optimization, the outer wall of the smoke exhaust pipe is sleeved with a sleeve pipe, an annular cavity is formed between the sleeve pipe and the smoke exhaust pipe, an air inlet pipe is fixed to the upper part of the side wall of the sleeve pipe, an air outlet pipe is fixed to the lower part of the side wall of the sleeve pipe, a blower is fixed to the outer wall of the furnace body, the air outlet pipe is communicated with the air exhaust pipe of the blower, and the air exhaust pipe of the blower is communicated with the combustion chamber. When the blower is used, negative pressure is formed in the annular cavity, so that external air flows into the annular cavity, the external air and the high-temperature flue gas exchange heat to form high-temperature air, the high-temperature air is discharged into the combustion chamber by the blower to assist combustion, and the combustion efficiency of the internal fuel is improved. Moreover, when the smoke exhaust pipe is cleaned, the heat transfer efficiency of the smoke exhaust pipe is higher, and thus the heat exchange efficiency is improved.
[0007] As optimization, the outer wall of the smoke exhaust pipe is sleeved with a sleeve pipe, an annular cavity is formed between the sleeve pipe and the smoke exhaust pipe, an air inlet pipe is fixed to the upper part of the side wall of the sleeve pipe, an air outlet pipe is fixed to the lower part of the side wall of the sleeve pipe, a blower is fixed to the outer wall of the furnace body, the air outlet pipe is communicated with the air exhaust pipe of the blower, and the air exhaust pipe of the blower is communicated with the combustion chamber. When the blower is used, negative pressure is formed in the annular cavity, so that external air flows into the annular cavity, the external air and the high-temperature flue gas exchange heat to form high-temperature air, the high-temperature air is discharged into the combustion chamber by the blower to assist combustion, and the combustion efficiency of the internal fuel is improved. Moreover, when the smoke exhaust pipe is cleaned, the heat transfer efficiency of the smoke exhaust pipe is higher, and thus the heat exchange efficiency is improved.
[0008] As optimization, the air inlet pipe is fixed with a filter screen. The optimization scheme avoids foreign matters from entering the annular cavity.
[0009] As optimization, a rain cover is fixed to the upper end of the smoke exhaust pipe. The optimization scheme avoids raindrops from entering the smoke exhaust pipe.
[0010] As optimization, the upper end of the flue is fixed with a first flange, the lower end of the smoke exhaust pipe is fixed with a second flange, and the first flange and the second flange are fixed by bolts. The flange connection is convenient to disassemble and assemble.
[0011] The utility model discloses a beneficial effect is: utilize natural wind to drive the fan blade, thereby drive the rotation of the shaft, and then make the scraper to the inner wall of the smoke exhaust pipe scrape and sweep, realize automatic cleaning, need not use electric power unit, save energy, reduce use cost. Through the utilization of natural wind, the scraper can intermittently scrape and sweep the smoke exhaust pipe, prevent the smoke dust from long -term accumulation and agglomerate, thereby reduce the burden of the chimney, improve the heat transfer efficiency of the smoke exhaust pipe. And because the lower end of the flue is communicated with the slag collecting drawer, the cleaned smoke dust can directly fall into the slag collecting drawer and be collected and handled, convenient to use.
[0012] Through the blower, negative pressure is formed in the annular cavity, so that external air flows into the annular cavity, the external air and the high-temperature flue gas exchange heat to form high-temperature air, the flue gas waste heat is recovered, the high-temperature air is discharged into the combustion chamber by the blower to assist combustion, the combustion efficiency of the internal fuel is improved, and resource waste is avoided. Moreover, when the smoke dust on the inner wall of the smoke exhaust pipe is cleaned, the heat transfer efficiency of the smoke exhaust pipe is higher, and thus the heat exchange efficiency and the heat recovery utilization rate can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 It is the internal structure schematic view of the furnace body of the utility model.
[0014] Fig. 2 is a top view of the utility model;
[0015] Fig. 3 is a sectional view of the outer sleeve and the smoke exhaust pipe;
[0016] Fig. 4 is a top view of the outer sleeve and the smoke exhaust pipe;
[0017] Fig. 5 is a top view of the utility model; Fig. 3 is an enlarged view of A part of
[0018] shown in the drawing:
[0019] 1, furnace body, 2, combustion chamber, 3, slag outlet, 4, slag collecting drawer, 5, flue, 6, smoke exhaust pipe, 7, outer sleeve, 8, air inlet pipe, 9, air outlet pipe, 10, air blower, 11, air extraction pipe, 12, air exhaust pipe, 13, rotating shaft, 14, rain cap, 15, flame port, 16, fuel port, 17, bearing, 18, fan blade, 19, filter screen, 20, cooling fin, 21, scraper, 22, connecting rod, 23, connecting rod, 24, second flange, 25, first flange, 26, annular cavity. DETAILED DESCRIPTION
[0020] To clearly illustrate the technical features of the present scheme, the present scheme will be described below through specific embodiments.
[0021] As shown in Figs. 1-5 , a self-cleaning high-efficiency waste heat recovery furnace comprises a furnace body 1, a combustion chamber 2 is arranged in the furnace body 1, a slag outlet 3 is formed in the bottom of the combustion chamber 2, a slag collecting drawer 4 is arranged below the slag outlet 3, a flue 5 in communication with the upper part of the combustion chamber 2 is further arranged in the furnace body 1, the lower end of the flue 5 is in communication with the slag collecting drawer 4, and the upper end of the flue 5 extends to the outside of the furnace body 1 and is fixedly connected with a vertically extending smoke exhaust pipe 6.
[0022] A flame port 15 in communication with the upper end surface of the furnace body 1 is formed in the top of the combustion chamber 2, and a furnace cover is placed on the flame port. A fuel port 16 in communication with the front end surface of the furnace body 1 is formed in the front side wall of the combustion chamber 2, and a cover is hingedly connected to the fuel port.
[0023] In use, fuel is put into the combustion chamber 2 through the fuel port 16. A kettle can be placed on the flame port 15 to boil water. The slag generated by combustion falls into the slag collecting drawer 4 through the slag outlet 3 for collection. The flue gas generated by combustion flows upward into the smoke exhaust pipe 6 through the flue 5, and is discharged to the outside through the smoke exhaust pipe 6.
[0024] Preferably, the upper end of the flue 5 is fixed with a first flange 25, the lower end of the smoke exhaust pipe 6 is fixed with a second flange 24, the first flange 25 and the second flange 24 are fixed by bolts, which is convenient for disassembly and assembly.
[0025] The rotating shaft 13 is coaxially arranged in the smoke exhaust pipe 6, the outer wall of the rotating shaft 13 is fixed with the scraper 21 which is in contact with the inner wall of the smoke exhaust pipe 6, the upper end of the rotating shaft 13 extends to the outside of the smoke exhaust pipe 6 and is fixed with the plurality of flaps 18 which are evenly distributed along the circumferential direction of the rotating shaft 13.
[0026] The outer wall of the rotating shaft 13 is fixed with the two connecting rods 23 which are symmetrically arranged, the two connecting rods 23 are fixed with the inner wall of the smoke exhaust pipe 6, so that the rotating shaft 13 and the smoke exhaust pipe 6 are rotatably connected. The outer wall of the rotating shaft 13 is fixed with the two scrapers 21 which are vertically arranged and are fixed with the rotating shaft 13 by the connecting rod 22. The upper end of the rotating shaft 13 is fixed with the four flaps 18 which are vertically arranged, so that the flaps can be blown by the natural wind when the natural wind blows horizontally.
[0027] In use, the upper end of the smoke exhaust pipe 6 is arranged at a high altitude, when the natural wind blows, the flaps 18 are blown, so that the rotating shaft 13 rotates, and then drives the scraper 21 to rotate and scrape the inner wall of the smoke exhaust pipe 6. As long as there is wind outside, the scraper 21 can be scraped, the smoke exhaust pipe 6 is scraped by the scraper 21 at irregular intervals, which can effectively prevent the smoke dust from accumulating and caking for a long time, thereby reducing the burden of the chimney and improving the heat transfer efficiency of the smoke exhaust pipe. Since the lower end of the flue 5 is also communicated with the slag collecting drawer 4, the smoke dust scraped by the scraper 21 can directly fall into the slag collecting drawer 4 and be collected and treated together with the slag, which is convenient to use.
[0028] Preferably, the upper end of the smoke exhaust pipe 6 is fixed with a rain cover 14 to prevent raindrops from entering the smoke exhaust pipe.
[0029] The outer wall of the smoke exhaust pipe 6 is fixed with the outer sleeve 7, the annular cavity 26 is formed between the outer sleeve 7 and the smoke exhaust pipe 6, the upper part of the side wall of the outer sleeve 7 is fixed with the air inlet pipe 8, the lower part of the side wall of the outer sleeve 7 is fixed with the air outlet pipe 9, the outer wall of the furnace body 1 is fixed with the air blower 10, the air outlet pipe 9 is communicated with the air exhaust pipe 11 of the air blower 10, and the air exhaust pipe 12 of the air blower 10 is communicated with the combustion chamber 2.
[0030] The upper and lower ends of the outer sleeve 7 are closed, so that the annular cavity 26 is in a closed state, which can reduce heat loss and make the heat in the annular cavity higher. The side wall of the outer sleeve 7 is symmetrically fixed with the two air inlet pipes 8, which improves the air intake and improves the heat exchange efficiency.
[0031] In use, the air ring cavity 26 is formed by the negative pressure of the air blower 10, so that the outside air flows into the air ring cavity 26, and the outside air and the high-temperature flue gas exchange heat to form high-temperature air, which is discharged into the combustion chamber 2 by the air blower 10 to assist combustion, thereby improving the combustion efficiency of the internal fuel and avoiding resource waste.
[0032] It should be noted that the high-temperature air discharged by the air blower 10 can also be used for heating, such as connecting the exhaust pipe 12 of the air blower 10 to a heater to provide a heat source or directly discharging the high-temperature air to the room, which can also achieve the effect of heating. Such a structure is simple to change, and those skilled in the art can easily think of it, which still belongs to the protection scope of the present application.
[0033] Preferably, the smoke exhaust pipe 6 is provided with a plurality of heat dissipation fins 20 on the outer wall of the air ring cavity 26 in the circumferential direction. The heat dissipation fins further improve the heat transfer efficiency of the heat in the smoke exhaust pipe to the outside, thereby further improving the heat exchange efficiency.
[0034] Preferably, the air inlet pipe 8 is fixed with a filter screen 19 to prevent foreign matter from entering the air ring cavity.
[0035] Of course, the above description is not limited to the above examples, and the technical features not described in the present application can be realized by or using the prior art, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present application and are not limited to the present application. The above embodiments and drawings are only used to illustrate the technical scheme of the present application and are not limited to the present application. Those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the present application do not deviate from the purpose of the present application, and should also belong to the protection scope of the claims of the present application.
Claims
1. A self-cleaning high-efficiency waste heat recovery furnace, comprising a furnace body (1), a combustion chamber (2) is arranged in the furnace body (1), a slag discharge port (3) is arranged at the bottom of the combustion chamber (2), and a slag collecting drawer (4) is arranged below the slag discharge port (3), characterized in that: The furnace body (1) is further provided with a flue (5) communicated with the upper portion of the combustion chamber (2), the lower end of the flue (5) is communicated with the slag collecting drawer (4), the upper end of the flue (5) extends to the outside of the furnace body (1) and is fixedly connected with a vertically extending flue gas discharge pipe (6), the flue gas discharge pipe (6) is rotatably connected with a rotating shaft (13), the rotating shaft (13) and the flue gas discharge pipe (6) are coaxially arranged, the outer wall of the rotating shaft (13) is fixedly connected with a scraper (21) in contact with the inner wall of the flue gas discharge pipe (6), the upper end of the rotating shaft (13) extends to the outside of the flue gas discharge pipe (6) and is fixedly connected with a plurality of fan blades (18), and the plurality of fan blades (18) are uniformly distributed along the circumference of the rotating shaft (13).
2. The self-cleanable high-efficiency heat recovery oven of claim 1, wherein: The outer wall of the flue gas discharge pipe (6) is sleeved and fixedly connected with an outer sleeve (7), an annular cavity (26) is formed between the outer sleeve (7) and the flue gas discharge pipe (6), the upper portion of the side wall of the outer sleeve (7) is fixedly connected with an air inlet pipe (8), the lower portion of the side wall of the outer sleeve (7) is fixedly connected with an air outlet pipe (9), the outer wall of the furnace body (1) is fixedly connected with a blower (10), the air outlet pipe (9) is communicated with the air suction pipe (11) of the blower, and the air discharge pipe (12) of the blower is communicated with the combustion chamber (2).
3. The self-cleanable high-efficiency heat recovery oven of claim 2, wherein: The outer wall of the flue gas discharge pipe (6) in the annular cavity (26) is uniformly distributed in the circumferential direction.
4. The self-cleanable high-efficiency heat recovery oven of claim 2, wherein: The air inlet pipe (8) is fixedly connected with a filter screen (19).
5. The self-cleanable high efficiency heat recovery oven of claim 1, wherein: The upper end of the flue gas discharge pipe (6) is fixedly connected with a rain cover (14).
6. The self-cleanable high efficiency heat recovery oven of claim 1, wherein: The upper end of the flue (5) is fixedly connected with a first flange (25), the lower end of the flue gas discharge pipe (6) is fixedly connected with a second flange (24), and the first flange and the second flange are fixedly connected by bolts.