A waste heat utilization device for a burner

Abstract

The application provides a waste heat utilization device for a burner and belongs to the technical field of waste heat utilization.The waste heat utilization device comprises a shell, an air inlet and an air outlet arranged at the top and the bottom of the shell respectively, and a heat exchange mechanism, wherein the heat exchange mechanism comprises a ring-shaped smoke inlet seat and a hollow ring cover rotatably connected in the shell.The high-temperature flue gas generated by the operation of the boiler flows through the smoke cover, the ring-shaped smoke inlet seat, the heat exchange part one, the hollow ring cover, the heat exchange part two and the sleeve in sequence and is discharged from the smoke discharge cover, the heat exchange part one and the heat exchange part two rotate under the drive of the driving part, the air enters the shell from the air inlet at the top of the shell and contacts the rotating heat exchange part one and the heat exchange part two to realize heat exchange, the rotation of the heat exchange part one and the heat exchange part two enables the outer wall of the heat exchange part one and the heat exchange part two to be fully and effectively contacted with the air and greatly reduces the dead angle of contact, thereby improving the heat exchange efficiency between the air and the high-temperature flue gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat utilization, in particular to a waste heat utilization device for a burner. BACKGROUND

[0002] Plant oil fuel vertical boiler is often used in hotels to heat water or for heating, and is a vertical boiler using plant oil as fuel. Plant oil is difficult to ignite at normal temperature and pressure and belongs to non-flammable liquid. Moreover, the flash point of plant oil is usually high, which greatly reduces the risk of fire and explosion in the process of daily use, storage and transportation compared with gasoline and diesel oil, and use is safer. Meanwhile, plant oil has a high calorific value and can release a large amount of heat during combustion, thereby saving fuel use and being more energy-saving. During operation of the boiler, plant oil fuel is delivered to the burner of the boiler by an oil pump, and external air enters the burner. In the burner, the plant oil fuel is atomized into oil droplets and mixed with air sent by a centrifugal fan, and then ignited by an ignition device of the burner for combustion. The heat generated by combustion is transferred to the water pipes in the boiler to heat the water flowing in the water pipes. The high-temperature flue gas generated by combustion flows through the heat exchange pipes of the waste heat utilization device in the smoke pipe. After the external air passes through the heat exchange pipes, the air exchanges heat with the high-temperature flue gas and then enters the inside of the boiler. The preheated air entering the burner can increase the temperature of the mixture of fuel and air, accelerate the combustion reaction speed, make the combustion more complete, thereby releasing more heat, and help the fuel to burn more fully and uniformly, thereby reducing the emission of pollutants. The high-temperature flue gas flowing in the heat exchange pipes exchanges heat with the air and is then discharged.

[0003] In the common waste heat utilization device for a burner, the high-temperature flue gas generated by the boiler enters the heat exchange pipes in the waste heat utilization device, and the external air passes through the heat exchange pipes to exchange heat between the high-temperature flue gas and the air. When the air passes through the heat exchange pipes, the side of the heat exchange pipes facing the air flow direction can fully contact the air, and the heat exchange effect is good. However, the side of the heat exchange pipes away from the air flow direction is difficult to fully contact the air due to the blockage of the structure of the heat exchange pipes, which affects the heat exchange efficiency between the air and the high-temperature flue gas. Therefore, the present application provides a waste heat utilization device for a burner to meet the needs. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a waste heat utilization device for a burner to solve the problem that the side of the heat exchange pipes away from the air flow direction is difficult to efficiently exchange heat with the air due to insufficient contact between the air and the heat exchange pipes, thereby affecting the heat exchange efficiency between the air and the high-temperature flue gas.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] A waste heat utilization device for a burner, comprising a shell, an air inlet and an air outlet arranged at the top and bottom of the shell respectively, and further comprising:

[0007] A heat exchange mechanism, comprising an annular smoke inlet seat and a hollow ring cover rotatably connected in the shell, a smoke cover is arranged on the side of the shell, the annular smoke inlet seat is rotatably connected to the side of the smoke cover close to the shell, a sleeve is fixed to the inner wall of the annular smoke inlet seat, the smoke cover is sleeved on the outer wall of the sleeve, a smoke exhaust cover is arranged on the side of the smoke cover away from the shell, the sleeve is rotatably connected to the side of the smoke exhaust cover close to the shell, heat exchange piece one and heat exchange piece two are communicated between the annular smoke inlet seat and the hollow ring cover, the heat exchange piece two is located inside the heat exchange piece one, the hollow ring cover is used for the communication of the heat exchange piece one and the heat exchange piece two, the heat exchange piece two is communicated with the sleeve, and a driving piece for driving the rotation of the annular smoke inlet seat, the heat exchange piece one, the heat exchange piece two and the hollow ring cover is installed on the outer wall of the shell.

[0008] Preferably, the heat exchange piece one comprises a plurality of circular tubes fixed between the annular smoke inlet seat and the hollow ring cover, one end of the circular tube is communicated with the annular smoke inlet seat, the other end of the circular tube is communicated with the hollow ring cover, the heat exchange piece two comprises an inner smoke pipe fixed between the annular smoke inlet seat and the hollow ring cover, the inner wall of the hollow ring cover is provided with an inclined groove, one end of the inner smoke pipe is communicated with the sleeve, the other end of the inner smoke pipe is communicated with the hollow ring cover, a plurality of circular tubes are uniformly arranged outside the inner smoke pipe, high-temperature flue gas enters from the smoke cover and flows through the annular smoke inlet seat, the circular tube, the hollow ring cover, the inner smoke pipe and the sleeve in turn, and is discharged from the smoke exhaust cover.

[0009] Preferably, the end of the circular tube away from the annular smoke inlet seat is provided with an expansion part, the expansion part is fixed to the side of the hollow ring cover close to the annular smoke inlet seat, and the diameter of the expansion part gradually increases from the annular smoke inlet seat to the hollow ring cover.

[0010] Preferably, the side of the hollow ring cover close to the annular smoke inlet seat is fixed with a plurality of flow guide cores, the flow guide cores are located inside the expansion part, the flow guide core comprises a guide part and a connecting part connected in sequence, the length of the guide part is greater than the length of the connecting part, the diameter of the guide part gradually increases from the annular smoke inlet seat to the hollow ring cover, the diameter of the connecting part gradually decreases from the annular smoke inlet seat to the hollow ring cover, and the connecting part is fixed to the side of the hollow ring cover close to the annular smoke inlet seat.

[0011] Preferably, the outer wall of the guide part is provided with a plurality of annular flow guide parts, the diameters of the plurality of annular flow guide parts gradually increase from the annular smoke inlet seat to the hollow ring cover, and the annular flow guide part is provided with a flow guide surface one.

[0012] Preferably, the diameter of the end of the inner smoke pipe close to the hollow ring cover is smaller than the diameter of the end away from the hollow ring cover.

[0013] Preferably, the outer wall of the inner smoke pipe is fixed with a plurality of flow guide fins, the plurality of flow guide fins are evenly arranged on the outer wall of the inner smoke pipe, the positions of the plurality of flow guide fins correspond to the positions of the plurality of circular pipes, and the number of the plurality of flow guide fins corresponds to the number of the plurality of circular pipes.

[0014] Preferably, the outer wall of the outer shell is fixed with a plurality of annular fins, the plurality of annular fins are evenly distributed on the outer wall of the outer shell.

[0015] Preferably, the outer wall of the outer shell is fixed with a plurality of annular fins, the plurality of annular fins are evenly distributed on the outer wall of the outer shell.

[0016] Preferably, the inner wall of the outer shell is provided with a plurality of strip-shaped protrusions, and the top of each strip-shaped protrusion is provided with an inclined flow guide surface two.

[0017] Compared with the prior art, the present application has at least the following advantages:

[0018] In the above scheme, the high-temperature flue gas generated by the operation of the boiler flows through the smoke inlet hood, the annular smoke inlet seat, the heat exchange member one, the hollow ring cover, the heat exchange member two and the sleeve in sequence and is discharged from the smoke discharge hood, the heat exchange member one and the heat exchange member two rotate under the driving of the driving member, air enters from the air inlet at the top of the outer shell and contacts the rotating heat exchange member one and the heat exchange member two to realize heat exchange, the rotation of the heat exchange member one and the heat exchange member two enables each part of the outer wall of the heat exchange member one and the heat exchange member two to be in full and effective contact with air and greatly reduces the dead angle of contact, thereby improving the heat exchange efficiency between air and high-temperature flue gas.

[0019] Through the arrangement of the expansion part, the expansion part is located at the end of the smoke pipe away from the smoke inlet hood, the heat of the high-temperature flue gas gradually decreases after flowing in the circular pipe and exchanging heat with air, the contact area between air and the circular pipe is increased through the design of the expansion part, thereby improving the heat exchange efficiency and making up for the defect that the temperature of the high-temperature flue gas gradually decreases.

[0020] Through the arrangement of the flow guide core and the annular flow guide part, the high-temperature flue gas flowing in the expansion part is guided by the guide part on the flow guide core, preventing the high-temperature flue gas from directly passing through the center of the expansion part, and the high-temperature flue gas flowing through the guide part is guided by the flow guide surface one on the annular flow guide part, so that the high-temperature flue gas flows to the inner wall of the expansion part, further increasing the heat exchange capacity between air and high-temperature flue gas, and further improving the heat exchange efficiency between air and high-temperature flue gas.

[0021] Through the arrangement of the guide fins, the guide fins are fixed on the outer wall of the inner flue pipe, when the air flows through the inner flue pipe, the contact area of the air and the inner flue pipe is increased through the guide fins, so that the heat exchange capacity of the air and the high-temperature flue gas flowing in the inner flue pipe is improved, and the guide fins rotate with the inner flue pipe, and the number and position of the guide fins correspond to the number and position of the circular pipes, in the rotating process of the guide fins, the air flows to the side of the circular pipe close to the inner flue pipe under the guidance of the guide fins, so that the outer wall of the circular pipe is fully and effectively contacted with the air, and the heat exchange efficiency of the air and the high-temperature flue gas is improved again.

[0022] Through the arrangement of the strip-shaped protrusions and the guide surface two, when the air enters the inside of the shell, the air flowing along the inner wall of the shell flows to the direction of the circular pipe under the guidance of the guide surface two on the strip-shaped protrusions, and the heat exchange capacity between the air and the circular pipe is improved again.

[0023] Through the arrangement of the smoke return channel, the smoke return channel is arranged between the inner flue pipe and the sleeve pipe and the elbow pipe, when the high-temperature flue gas flows in the smoke return channel, the heat exchange between the high-temperature flue gas and the air flowing in the elbow pipe is realized, and the heat exchange capacity of the high-temperature flue gas and the air is further improved, so that the heat exchange efficiency of the air and the high-temperature flue gas is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the application;

[0025] Figure 2 It is a circular pipe place stereogram structure schematic view of the application;

[0026] Figure 3 It is a cross-sectional view of the elbow pipe of the application;

[0027] Figure 4 It is a cross-sectional view of the inner flue pipe of the application;

[0028] Figure 5 It is a ring-shaped fin place stereogram structure schematic view of the application;

[0029] Figure 6 It is a guide fin place stereogram structure schematic view of the application;

[0030] Figure 7 It is a hollow ring cover place stereogram structure schematic view of the application;

[0031] Figure 8 It is a ring-shaped smoke inlet seat place stereogram structure schematic view of the application;

[0032] Figure 9 It is a cross-sectional view of the hollow ring cover of the application;

[0033] Figure 10 It is a guide core stereogram structure schematic view of the application;

[0034] Figure 11 Fig. 1 is a schematic view of the internal three-dimensional structure of the shell of the present application.

[0035] In the figure: 1, shell; 2, smoke inlet cover; 3, smoke outlet cover; 4, heat exchange mechanism; 5, elbow pipe; 6, annular smoke inlet seat; 7, sleeve; 8, hollow ring cover; 9, inclined chute; 10, driving member; 11, heat exchange member one; 12, circular pipe; 13, expansion part; 14, flow guide core; 15, annular flow guide part; 16, flow guide surface one; 17, heat exchange member two; 18, inner smoke pipe; 19, flow guide fin; 20, smoke return channel; 21, strip-shaped protrusion; 22, flow guide surface two; 23, annular fin; 24, guide part; 25, connecting part.

[0036] As shown in the figure, in order to clearly realize the structure of the embodiment of the present application, specific structures and devices are marked in the figure, but this is only for the need of illustration, and is not intended to limit the present application in the specific structure, device and environment, and according to specific needs, those skilled in the art can adjust or modify these devices and environment, and the adjustment or modification still includes in the scope of the appended claims. DETAILED DESCRIPTION

[0037] The waste heat utilization device for the burner provided by the present application is described in detail below in combination with the accompanying drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the accompanying drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0038] It should be noted that, in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0039] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily dictating whether any feature, structure, or characteristic is required, singular, or plural. Additionally, the term "based on" can be understood as not necessarily of a set of exclusive factors, but instead, can allow for existence of additional factors not explicitly described, again, depending on the context.

[0040] AsFigures 1-11 As shown, the embodiment of the present application provides a waste heat utilization device for a burner, comprising a shell 1 and air inlets and air outlets arranged at the top and bottom of the shell 1 respectively, a support is mounted on the outer wall of the shell 1, and the shell 1 is mounted at a mounting position through the support, further comprising:

[0041] The heat exchange mechanism 4 includes a ring-shaped smoke inlet seat 6 and a hollow ring cover 8 rotatably connected in the shell 1. A sealing ring is installed at the positions corresponding to the ring-shaped smoke inlet seat 6 and the hollow ring cover 8 inside the shell 1, which is used to prevent air from flowing out from the connection between the shell 1 and the ring-shaped smoke inlet seat 6 and the hollow ring cover 8. A smoke inlet cover 2 is arranged on the side of the shell 1. The ring-shaped smoke inlet seat 6 is rotatably connected to the side of the smoke inlet cover 2 close to the shell 1. A sealing ring is installed between the smoke inlet cover 2 and the ring-shaped smoke inlet seat 6, which is used to prevent high-temperature flue gas from leaking out from the connection between the ring-shaped smoke inlet seat 6 and the smoke inlet cover 2. A sleeve 7 is fixed to the inner wall of the ring-shaped smoke inlet seat 6. The smoke inlet cover 2 is sleeved on the outer wall of the sleeve 7. A smoke outlet cover 3 is arranged on the side of the smoke inlet cover 2 away from the shell 1. A sealing ring is installed between the sleeve 7 and the smoke outlet cover 3, which is used to prevent high-temperature flue gas from leaking out from the connection between the sleeve 7 and the smoke outlet cover 3. The sleeve 7 is rotatably connected to the side of the smoke outlet cover 3 close to the shell 1. The ring-shaped smoke inlet seat 6 and the hollow ring cover 8 are communicated with a heat exchange part one 11 and a heat exchange part two 17. The heat exchange part two 17 is located inside the heat exchange part one 11. The hollow ring cover 8 is used for the communication between the heat exchange part one 11 and the heat exchange part two 17. The heat exchange part two 17 is communicated with the sleeve 7. The smoke inlet cover 2 and the smoke outlet cover 3 are both communicated with the smoke pipe of the boiler. The high-temperature flue gas generated by the operation of the boiler enters the smoke inlet cover 2 through the smoke pipe, and then flows through the ring-shaped smoke inlet seat 6, the heat exchange part one 11, the hollow ring cover 8, the heat exchange part two 17, and the sleeve 7 in sequence before being discharged from the smoke outlet cover 3. The high-temperature flue gas discharged from the smoke outlet cover 3 enters the smoke pipe and is discharged from the smoke outlet of the smoke pipe. A driving part 10 for driving the rotation of the ring-shaped smoke inlet seat 6, the heat exchange part one 11, the heat exchange part two 17, and the hollow ring cover 8 is installed on the outer wall of the shell 1. A gear cover is installed on the outer wall of the shell 1. The driving part 10 is fixed on the gear cover. A gear is installed in the gear cover. A gear slot is formed on the outer wall of the ring-shaped smoke inlet seat 6. The gear is engaged with the gear slot. The driving part 10 is a reduction motor. During the rotation of the gear driven by the output shaft of the driving part 10, the ring-shaped smoke inlet seat 6 is slowly rotated through the engagement of the gear and the gear slot. The ring-shaped smoke inlet seat 6 slowly rotates, which can drive the heat exchange part one 11, the heat exchange part two 17, and the hollow ring cover 8 to slowly rotate. The rotation of the heat exchange part one 11 and the heat exchange part two 17 can make the air entering the top air inlet of the shell 1 fully and effectively contact the outer wall of the heat exchange part one 11 and the heat exchange part two 17, greatly reduce the contact dead angle, improve the heat exchange capacity of the air and the high-temperature flue gas, and thus improve the heat exchange efficiency between the air and the high-temperature flue gas. After the heated air enters the burner, the temperature of the mixture of fuel and air is increased, the combustion reaction speed is accelerated, the combustion is more sufficient, more heat is released, the preheated air helps the fuel to burn more fully and uniformly, the boiler equipped with the burner is a plant oil fuel boiler, plant oil is used as fuel, plant oil is difficult to be ignited at normal temperature and pressure and belongs to non-flammable liquid, the flash point of plant oil is usually high, the high-flash-point plant oil greatly reduces the risk of fire and explosion during daily use, storage, and transportation compared with gasoline and diesel oil.The plant oil is safer to use and has high heat value, and can release a large amount of heat during combustion, thereby saving fuel and being more energy-saving.

[0042] As shown in Figures 2-7 , in the embodiment, the heat exchange member one 11 comprises a plurality of circular tubes 12 fixed between the annular smoke inlet seat 6 and the hollow ring cover 8, one end of the circular tube 12 communicates with the annular smoke inlet seat 6, the other end of the circular tube 12 communicates with the hollow ring cover 8, the heat exchange member two 17 comprises an inner smoke tube 18 fixed between the annular smoke inlet seat 6 and the hollow ring cover 8, the inner wall of the hollow ring cover 8 is provided with a chute 9, one end of the inner smoke tube 18 communicates with the sleeve 7, the other end of the inner smoke tube 18 communicates with the hollow ring cover 8, a plurality of circular tubes 12 are uniformly arranged outside the inner smoke tube 18, high-temperature flue gas enters from the smoke inlet cover 2 and flows through the annular smoke inlet seat 6, the circular tube 12, the hollow ring cover 8, the inner smoke tube 18 and the sleeve 7 in turn, and is discharged from the smoke outlet cover 3, when the air flows in the shell 1, part of the air flows between the circular tube 12 and the inner wall of the shell 1, and part of the air flows between the circular tube 12 and the inner smoke tube 18 through the space between adjacent circular tubes 12, the flow mode improves the heat exchange capacity of the air and the high-temperature flue gas, thereby further improving the heat exchange efficiency of the air and the high-temperature flue gas.

[0043] As shown in Figures 2-5 , in the embodiment, the end of the circular tube 12 away from the annular smoke inlet seat 6 is provided with an expansion part 13, the expansion part 13 is fixed to the side of the hollow ring cover 8 close to the annular smoke inlet seat 6, the diameter of the expansion part 13 gradually increases from the annular smoke inlet seat 6 to the hollow ring cover 8, when the high-temperature flue gas flows to the position of the expansion part 13 in the circular tube 12, the design that the diameter of the expansion part 13 gradually increases is used to increase the contact area of the air and the circular tube 12 to improve the heat exchange capacity, thereby making up for the defect that the temperature of the high-temperature flue gas gradually decreases after heat exchange with the air in the circular tube 12.

[0044] As shown in Figure 3 and Figure 10As shown, in the embodiment, the hollow ring cover 8 is fixed with a plurality of flow guide cores 14 near one side of the annular tobacco inlet seat 6, the flow guide cores 14 are located inside the expansion part 13, the flow guide core 14 comprises a guide part 24 and a connecting part 25 connected in sequence, the length of the guide part 24 is greater than the length of the connecting part 25, the diameter of the guide part 24 gradually increases from the annular tobacco inlet seat 6 to the hollow ring cover 8, the diameter of the connecting part 25 gradually decreases from the annular tobacco inlet seat 6 to the hollow ring cover 8, the connecting part 25 is fixed on the side of the hollow ring cover 8 close to the annular tobacco inlet seat 6, when the high-temperature flue gas flows through the inside of the expansion part 13, the guide part 24 on the flow guide core 14 plays a guiding role on the high-temperature flue gas, preventing the high-temperature flue gas from directly passing through the center of the expansion part 13 without fully contacting the inner wall of the expansion part 13, and at the same time, the design of the connecting part 25 reduces the obstruction of the connecting part 25 to the high-temperature flue gas flowing through, so that the flow of the high-temperature flue gas is more smooth.

[0045] As shown in Figure 10 , in the embodiment, the outer wall of the guide part 24 is provided with a plurality of annular flow guide parts 15, the diameters of the plurality of annular flow guide parts 15 gradually increase from the annular tobacco inlet seat 6 to the hollow ring cover 8, the annular flow guide part 15 is provided with a flow guide surface 16, and the high-temperature flue gas flowing through the guide part 24 flows to the inner wall of the expansion part 13 under the guidance of the flow guide surface 16 on the annular flow guide part 15, thereby further improving the heat exchange capacity of the expansion part 13 and the air.

[0046] As shown in Figure 6 and Figure 7 , in the embodiment, the diameter of the inner tobacco pipe 18 near one end of the hollow ring cover 8 is smaller than the diameter of the end away from the hollow ring cover 8, and the contact area of the air with the inner tobacco pipe 18 gradually increases from left to right, thereby being able to compensate for the defect that the temperature of the high-temperature flue gas gradually decreases during the flow of the high-temperature flue gas in the inner tobacco pipe 18 from left to right.

[0047] As shown in Figure 6 and Figure 7 , in the embodiment, the outer wall of the inner tobacco pipe 18 is fixed with a plurality of flow guide fins 19, the plurality of flow guide fins 19 are uniformly arranged on the outer wall of the inner tobacco pipe 18, the positions of the plurality of flow guide fins 19 correspond to the positions of the circular pipes 12, and the number of the plurality of flow guide fins 19 corresponds to the number of the circular pipes 12, when the air passes through the inner tobacco pipe 18, the contact area of the air and the inner tobacco pipe 18 is increased by the flow guide fins 19, thereby improving the heat exchange capacity of the air and the high-temperature flue gas flowing in the inner tobacco pipe 18, and the flow guide fins 19 rotate with the inner tobacco pipe 18, in the rotating process, the air flows to the side of the circular pipe 12 close to the inner tobacco pipe 18 under the guidance of the flow guide fins 19, further making the outer wall of the circular pipe 12 fully and effectively contact with the air, thereby again improving the heat exchange efficiency of the air and the high-temperature flue gas.

[0048] As shown in Figures 1-5As shown, in the embodiment, the exhaust port of the shell 1 is fixed with a bend pipe 5, the end of the bend pipe 5 away from the shell 1 passes through the smoke hood 3, the sleeve 7, the inner smoke pipe 18 and the hollow ring cover 8 in turn and comes out from the side of the shell 1, the space formed between the inner wall of the inner smoke pipe 18 and the sleeve 7 and the outer wall of the bend pipe 5 is the smoke return channel 20, a sealing ring is installed at the connection between the bend pipe 5 and the hollow ring cover 8, which is used to prevent high-temperature flue gas from leaking out of the connection between the bend pipe 5 and the hollow ring cover 8, when the high-temperature flue gas flows in the smoke return channel 20, it can exchange heat with the air flowing in the bend pipe 5, thereby further improving the heat exchange capacity of the high-temperature flue gas and the air, and the air heated after flowing out of the bend pipe 5 flows to the inside of the burner through the air pipe.

[0049] As shown in Figure 2 , Figure 3 and Figure 5 , in the embodiment, the outer walls of the plurality of circular pipes 12 are jointly connected with a plurality of annular fins 23, the plurality of annular fins 23 are uniformly distributed on the outer walls of the circular pipes 12, and the annular fins 23 are used to increase the contact area between the air and the circular pipes 12, thereby improving the heat exchange capacity between the air and the circular pipes 12.

[0050] As shown in Figure 11 , in the embodiment, the inner wall of the shell 1 is provided with a plurality of strip-shaped protrusions 21, the top of each strip-shaped protrusion 21 is provided with an inclined flow guide surface two 22, after the air enters the inside of the shell 1, the air flowing along the inner wall of the shell 1 flows in the direction of the circular pipes 12 under the guidance of the flow guide surface two 22 on the strip-shaped protrusion 21, the air flows more concentratedly to the circular pipes 12 by changing the flow path of the air, thereby increasing the heat exchange capacity between the air and the circular pipes 12.

[0051] Working principle: after the burner is ignited, the fuel is burned in the boiler, the high-temperature flue gas generated by the operation of the boiler is sent into the smoke inlet hood 2 through the smoke pipe, the high-temperature flue gas flows through the annular smoke inlet seat 6, the circular pipe 12, the hollow ring cover 8, the chute 9, the inner smoke pipe 18 and the sleeve pipe 7 The smoke return channel 20 in place, and then discharged from the smoke exhaust hood 3, the high-temperature flue gas discharged from the smoke exhaust hood 3 enters the smoke pipe and is discharged from the smoke outlet of the smoke pipe, in the flow process of the high-temperature flue gas, the driving part 10 drives the gear of the gear transmission structure to rotate slowly, the gear is engaged with the tooth groove on the annular smoke inlet seat 6, thereby driving the annular smoke inlet seat 6 to rotate slowly, the annular smoke inlet seat 6 drives the circular pipe 12, the inner smoke pipe 18 and the sleeve pipe 7 to rotate slowly, at the same time, the annular smoke inlet seat 6 drives the hollow ring cover 8 to rotate slowly through the circular pipe 12 and the inner smoke pipe 18, after the air enters the inside of the shell 1 from the air inlet at the top of the shell 1, part of the air flows between the circular pipe 12 and the inner wall of the shell 1, part of the air flows between the circular pipe 12 and the inner smoke pipe 18 through the space between the adjacent circular pipes 12, and finally discharged from the air outlet at the bottom of the shell 1, in the flow process of the air in the shell 1, the rotation of the circular pipe 12 and the inner smoke pipe 18 enables the air to fully and effectively contact the outer wall of the circular pipe 12 and the inner smoke pipe 18, greatly reduces the contact dead angle, improves the heat exchange capacity of the high-temperature flue gas flowing in the circular pipe 12 and the inner smoke pipe 18 and the air, thereby improving the heat exchange efficiency between the air and the high-temperature flue gas;

[0052] When the high-temperature flue gas flows in the circular pipe 12 and reaches the position of the flow expansion part 13, it is affected by the gradually increasing diameter of the flow expansion part 13 from the annular smoke inlet seat 6 to the hollow ring cover 8, and at the same time, it is designed in cooperation with the gradually increasing guide part 24 on the flow guide core 14 from the annular smoke inlet seat 6 to the hollow ring cover 8, which prevents the high-temperature flue gas from directly passing through the center of the flow expansion part 13, and the high-temperature flue gas flowing from the guide part 24 is guided by the guide surface 16 on the annular flow guide part 15 to flow to the inner wall of the flow expansion part 13, further enhancing the heat exchange capacity of the high-temperature flue gas and air and compensating for the defect of the gradually decreasing temperature of the high-temperature flue gas;

[0053] At the same time, when the air flows through the outer wall of the inner smoke pipe 18, the contact area between the air and the inner smoke pipe 18 is increased by the flow guide fin 19, thereby improving the heat exchange capacity of the high-temperature flue gas passing through the inner smoke pipe 18 and the air, and the flow guide fin 19 rotates with the inner smoke pipe 18, in the rotation process, the air flows to the side of the circular pipe 12 close to the inner smoke pipe 18 under the guidance of the flow guide fin 19, further enabling the outer wall of the circular pipe 12 to fully and effectively contact the air, and the diameter of the end of the inner smoke pipe 18 close to the hollow ring cover 8 is smaller than the diameter of the end away from the hollow ring cover 8, the contact area between the air and the inner smoke pipe 18 gradually increases from left to right, and through this design, the defect of the gradually decreasing temperature of the high-temperature flue gas in the inner smoke pipe 18 from left to right can be compensated again;

[0054] When the air enters the inside of the shell 1 and flows along the inner wall of the shell 1, the air flows to the direction of the circular tube 12 under the guidance of the flow guide surface 22 on the strip-shaped convex 21, and the heat exchange capacity between the air and the circular tube 12 is improved again;

[0055] The air discharged from the bottom air outlet of the shell 1 enters the elbow pipe 5, and flows to the inside of the burner through the air pipe from the end of the elbow pipe 5, when the air flows in the elbow pipe 5, the high-temperature flue gas flowing from the smoke return channel 20 passes through the elbow pipe 5 and exchanges heat with the air, and the heat exchange capacity between the high-temperature flue gas and the air is improved again, so that the heat exchange efficiency between the air and the high-temperature flue gas is greatly improved.

[0056] The present application encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, the specific details are described in the above preferred embodiments of the present application, and the present application can also be completely understood without the description of these details for the person skilled in the art.

[0057] The above is only the preferred embodiment of the present application, and it should be pointed out that, for the ordinary skilled in the art, a number of improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A waste heat utilization device for a burner, comprising a housing (1) and an air inlet and an air outlet provided at the top and the bottom of the housing (1) respectively, characterized in that, Also include: Heat exchange mechanism (4), the heat exchange mechanism (4) includes annular smoke seat (6) and hollow ring cover (8) rotationally connected in the shell (1), the shell (1) side is provided with smoke cover (2), annular smoke seat (6) is rotationally connected in the side of smoke cover (2) close to shell (1), the inner wall of annular smoke seat (6) is fixed with sleeve pipe (7), smoke cover (2) is set in sleeve pipe (7) outer wall, the side of smoke cover (2) away from shell (1) is provided with smoke exhaust cover (3), sleeve pipe (7) is rotationally connected in the side of smoke exhaust cover (3) close to shell (1), annular smoke seat (6) and hollow ring cover (8) are communicated with heat exchange piece one (11) and heat exchange piece two (17), heat exchange piece two (17) is located in the inside of heat exchange piece one (11), hollow ring cover (8) is used for the communication of heat exchange piece one (11) and heat exchange piece two (17), heat exchange piece two (17) is communicated with sleeve pipe (7), the outer wall of shell (1) is installed for driving annular smoke seat (6), heat exchange piece one (11), heat exchange piece two (17) and hollow ring cover (8) rotation drive piece (10); Heat exchange piece one (11) includes several circular tubes (12) fixed between annular smoke seat (6) and hollow ring cover (8), one end of circular tube (12) is communicated with annular smoke seat (6), the other end of circular tube (12) is communicated with hollow ring cover (8), heat exchange piece two (17) includes inner smoke pipe (18) fixed between annular smoke seat (6) and hollow ring cover (8), the inner wall of hollow ring cover (8) is provided with inclined chute (9), one end of inner smoke pipe (18) is communicated with sleeve pipe (7), the other end of inner smoke pipe (18) is communicated with hollow ring cover (8), several circular tubes (12) are evenly arranged outside inner smoke pipe (18), high-temperature flue gas enters from smoke cover (2) and flows through annular smoke seat (6), circular tube (12), hollow ring cover (8), inner smoke pipe (18) and sleeve pipe (7) in turn and is discharged from smoke exhaust cover (3).

2. The apparatus for utilizing waste heat of a combustor according to claim 1, characterized by The end of the circular tube (12) away from the annular smoke seat (6) is provided with an expansion part (13), the expansion part (13) is fixed on the side of the hollow ring cover (8) close to the annular smoke seat (6), and the diameter of the expansion part (13) gradually increases from the annular smoke seat (6) to the hollow ring cover (8).

3. The apparatus according to claim 2, wherein The side of the hollow ring cover (8) close to the annular smoke seat (6) is fixed with several flow guide cores (14), the flow guide cores (14) are located inside the expansion part (13), the flow guide cores (14) include a guide part (24) and a connecting part (25) connected in sequence, the length of the guide part (24) is greater than the length of the connecting part (25), and the diameter of the guide part (24) gradually increases from the annular smoke seat (6) to the hollow ring cover (8), the diameter of the connecting part (25) gradually decreases from the annular smoke seat (6) to the hollow ring cover (8), and the connecting part (25) is fixed on the side of the hollow ring cover (8) close to the annular smoke seat (6).

4. The apparatus according to claim 3, wherein The outer wall of the guide part (24) is provided with a plurality of annular flow guide parts (15), the diameters of the annular flow guide parts (15) gradually increase from the annular smoke inlet seat (6) to the hollow ring cover (8), and the annular flow guide parts (15) are provided with flow guide surfaces (16).

5. The apparatus according to claim 1, wherein The diameter of the inner smoke pipe (18) near the one end of the hollow ring cover (8) is smaller than the diameter of the inner smoke pipe (18) far from the one end of the hollow ring cover (8).

6. The apparatus according to claim 5, wherein The outer wall of the inner smoke pipe (18) is fixed with a plurality of flow guide fins (19), the plurality of flow guide fins (19) are uniformly arranged on the outer wall of the inner smoke pipe (18), the positions of the plurality of flow guide fins (19) correspond to the positions of the circular pipes (12), and the number of the plurality of flow guide fins (19) corresponds to the number of the circular pipes (12).

7. The apparatus according to claim 1, wherein The exhaust port of the shell (1) is fixed with a bend pipe (5), one end of the bend pipe (5) far from the shell (1) passes through the smoke exhaust cover (3), the sleeve pipe (7), the inner smoke pipe (18) and the hollow ring cover (8) in sequence and penetrates out from the side of the shell (1), and the space formed between the inner wall of the inner smoke pipe (18) and the sleeve pipe (7) and the outer wall of the bend pipe (5) is a smoke return channel (20).

8. The apparatus according to claim 1, wherein The outer wall of the plurality of circular pipes (12) is connected with a plurality of annular fins (23) in common, and the plurality of annular fins (23) are uniformly distributed on the outer wall of the circular pipe (12) at intervals.

9. The apparatus according to claim 1, wherein The inner wall of the shell (1) is provided with a plurality of strip-shaped protrusions (21), and the top of each strip-shaped protrusion (21) is provided with an inclined flow guide surface (22).

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