H-shaped finned tube economizer for boiler
The H-type fin tube economizer's adjustable distance assembly and plate cleaning assembly enable flexible switching of fin states and automated cleaning, solving the problem of decreased heat transfer coefficient caused by fly ash accumulation and ensuring efficient operation of the boiler system.
Patent Information
- Application Number
- CN202511071442.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-10-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the use of existing boiler economizers, fly ash in the flue gas tends to accumulate in the gaps between the fins, resulting in a decrease in the heat transfer coefficient, difficulty in cleaning, and affecting the normal operation of the boiler system.
The H-type fin tube economizer is used, and the fins are driven to alternately switch between expansion and compression states through the pitch adjustment component. Combined with the storage plate component and the cleaning component, it can achieve non-stop cleaning and maintenance, thereby improving heat exchange efficiency.
Without stopping the machine, the heat exchange surface can be kept running efficiently, energy saving efficiency can be improved, cleaning and maintenance operations can be simplified, and stable heat exchange effect can be ensured.
Smart Images
Figure CN120760508A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of energy-saving and environment-friendly technology, and particularly relates to an H-shaped finned tube economizer for a boiler. BACKGROUND
[0002] The economizer is a device for improving energy utilization efficiency by recycling and utilizing waste heat, which is installed on the flue of the boiler, and makes the flue gas pass through the pipe of the medium, so that the heat of the flue gas is transferred to the medium. In order to improve the heat recovery and utilization efficiency, the fins are often welded on the pipe to increase the heat exchange area in the prior art, and the H-shaped fin is one of them.
[0003] In the use process of the existing economizer, the fly ash in the flue gas is accumulated in the gap between the fins to form an insulating layer, which finally leads to the decrease of the heat transfer coefficient. Even if the flue gas flow rate is optimized and the ash removal device is arranged, the ash removal capacity is limited, and the accumulation of fly ash is still difficult to avoid after a long running time. The ash removal work of the economizer often needs to be stopped, which not only has the problems of difficult operation and low cleaning efficiency, but also affects the normal operation of the boiler system.
[0004] Therefore, the present application provides an H-shaped finned tube economizer for a boiler. SUMMARY
[0005] In order to overcome the shortcomings of the prior art, the present application provides an H-shaped finned tube economizer for a boiler.
[0006] To solve the above technical problems, the present application provides the following technical solutions: a boiler H-shaped fin tube economizer, comprising a frame with a flue gas passage with front and rear openings, a flue connection flange for connecting the boiler flue is arranged at the end of the frame, a plurality of straight pipes are arranged in the frame, the straight pipes transversely penetrate the side wall of the frame and are exposed in the flue gas passage, the plurality of straight pipes are connected in series through elbow pipes to form a medium flow passage, one of which is a fluid medium inlet pipe and the other is a fluid medium outlet pipe, two groups of H-shaped fins are sleeved on each straight pipe, the H-shaped fin is composed of a pair of fins arranged opposite to each other, one side of the H-shaped fin corresponding to the straight pipe is provided with a recessed side wall and abuts against the straight pipe, the number of fins in each group of H-shaped fins is several, the two groups of H-shaped fins are divided into a first group of fins and a second group of fins, the first group of fins is in a compressed state in the radial direction of the straight pipe, and the second group of fins is in an expanded state in the radial direction of the straight pipe, a pitch adjusting assembly is arranged on the straight pipe, the pitch adjusting assembly is used to drive the first group of fins to expand the fin spacing in the radial direction of the straight pipe, and simultaneously drive the second group of fins to compress the fin spacing in the radial direction of the straight pipe, so as to realize the alternate switching of the working positions of the first group of fins and the second group of fins, and the reverse driving to realize the reset, the pitch adjusting assembly comprises a sliding frame connected to the upper and lower surfaces of the straight pipe, the side surface and the top surface of the sliding frame are provided with sliding grooves, the sliding grooves on the top surface of the sliding frame are sleeved with connecting shafts corresponding to the positions of the plurality of H-shaped fins, the top end of the connecting shaft is connected with an abutting key, and the bottom end of the connecting shaft is connected with a push disc, the abutting key and the push disc abut against the upper and lower surfaces of the sliding frame respectively, the push disc is provided with a push groove corresponding to one side of the straight pipe, the push groove is a back-shaped groove, the inner and outer walls of the push groove are concave inward, the inner and outer corners of the push groove are rounded, the upper and lower ends of the side surface of the H-shaped fin are provided with connecting protrusions, the connecting protrusions are connected with fixing frames through screws, the fixing frames are connected with insertion shafts, and the insertion shafts are sleeved in the push groove and abut against the inner and outer walls of the push groove.
[0007] As a preferred technical solution of the present application, a driving assembly is arranged on the straight pipe, the driving assembly is connected to the pitch adjusting assembly for controlling the action of the pitch adjusting assembly, the driving assembly comprises a rotating groove, the rotating groove is arranged on the side of the abutting key away from the straight pipe, a convex ball is connected to the inner wall of the rotating groove, a driving column is inserted into the rotating groove, a spiral groove is arranged on the driving column, the convex ball is sleeved in the spiral groove, a plurality of driving columns in the same row are sleeved in a lifting frame, a recess is arranged on the bottom surface of the lifting frame, and the rotating direction of the spiral groove on each convex ball is opposite to that on the adjacent convex ball, that is, when the spiral groove on the middle convex ball is in the clockwise direction, the spiral groove on the adjacent convex ball is in the counterclockwise direction.
[0008] As a preferred technical scheme of the present application, the frame is provided with a plate storage assembly on both sides, the plate storage assembly is used for accommodating the H-shaped fins in the compressed state, the plate storage assembly comprises a plurality of plate storage boxes which are respectively connected to the left and right surfaces of the frame, the positions of the plurality of plate storage boxes correspond to the positions of the plurality of straight pipes respectively, the plate storage box is open on one side corresponding to the frame and communicates with the inside of the frame, the front and rear sides of the plate storage box are open and connected with observation windows made of transparent material, the upper and lower sides of the plate storage box are open and threadedly connected with upper and lower separate covers, the plate storage assembly further comprises a side push plate, one side of the plate storage box outside the frame is open and sleeved with the side push plate, a circular hole is formed in the side push plate for sleeving the straight pipe, a square hole is formed in the side push plate for sleeving the sliding frame, a sleeve hole is formed in the side push plate at a position corresponding to the lifting frame, a ring groove is formed in the inner wall of the sleeve hole, a lifting frame is sleeved in the ring groove, a lifting frame is formed in the center of the lifting frame and sleeved on the lifting frame, a free plate is arranged between the two groups of H-shaped fins, the free plate is arranged in the same way as the rotating groove, the free plate is also provided with a circular hole, a square hole, a sleeve hole, a lifting frame and a heat insulation pad, the plate storage assembly further comprises a guide frame plate, the guide frame plate is connected to the upper and lower inner walls of the plate storage box on the left side, an insertion hole is formed in the lifting frame and sleeved on the guide frame plate, the left and right ends of the guide frame plate are bent away from the straight pipe, and the middle part of the guide frame plate is linear.
[0009] As a preferred technical scheme of the present application, the frame is provided with a plate storage assembly on both sides, the plate storage assembly is used for accommodating the H-shaped fins in the compressed state, the plate storage assembly comprises a plurality of plate storage boxes which are respectively connected to the left and right surfaces of the frame, the positions of the plurality of plate storage boxes correspond to the positions of the plurality of straight pipes respectively, the plate storage box is open on one side corresponding to the frame and communicates with the inside of the frame, the front and rear sides of the plate storage box are open and connected with observation windows made of transparent material, the upper and lower sides of the plate storage box are open and threadedly connected with upper and lower separate covers, the plate storage assembly further comprises a side push plate, one side of the plate storage box outside the frame is open and sleeved with the side push plate, a circular hole is formed in the side push plate for sleeving the straight pipe, a square hole is formed in the side push plate for sleeving the sliding frame, a sleeve hole is formed in the side push plate at a position corresponding to the lifting frame, a ring groove is formed in the inner wall of the sleeve hole, a lifting frame is sleeved in the ring groove, a lifting frame is formed in the center of the lifting frame and sleeved on the lifting frame, a lifting frame is formed in the center of the lifting frame and sleeved on the lifting frame, a free plate is arranged between the two groups of H-shaped fins, the free plate is arranged in the same way as the rotating groove, the free plate is also provided with a circular hole, a square hole, a sleeve hole, a lifting frame and a heat insulation pad, the plate storage assembly further comprises a guide frame plate, the guide frame plate is connected to the upper and lower inner walls of the plate storage box on the left side, an insertion hole is formed in the lifting frame and sleeved on the guide frame plate, the left and right ends of the guide frame plate are bent away from the straight pipe, and the middle part of the guide frame plate is linear.
[0010] Compared with the prior art, the present application has the following beneficial effects: 1. By arranging the distance adjusting assembly, the H-shaped fins are grouped, and the two groups of fins are driven to alternately switch between the expanded state and the compressed storage state, so that the working-backup-cleaning three states are converted, so that the heat exchange surface is always in the high efficiency area under the premise of not stopping, thereby improving the energy saving efficiency and effect of the energy saving device, and facilitating cleaning, maintenance or replacement of the H-shaped fins outside the working area.
[0011] 2. By arranging the push groove, the H-shaped fins can be unlocked from the straight pipe during rotation, so that the H-shaped fins can be switched between the expanded and compressed states, and the H-shaped fins are automatically locked on the straight pipe after switching is completed, so that the stability of the heat exchange effect under tight contact is ensured.
[0012] 3、 through the drive assembly setting, using the drive column that can adapt H type fin position as the drive point, and by a lifting frame synchronous control, let the rotation of the abutment key is synchronous, stable and convenient, avoid the jam caused by the different step of multiple fins, at the same time, through the staggered setting of the rotation direction of the spiral groove, when the abutment key moves, the end is contacted and forced, so that the friction between the abutment keys 16 is minimized, further improving the convenience of operation.
[0013] 4、 through the setting of the storage plate assembly, the H type fin in compression state can be contained, and the free plate and the side push plate are used to seal it inside, so as to avoid the influence of heat exchange with the outside on the temperature of the medium in the straight pipe, and also avoid the influence of too much flue gas on the H type fin in compression state, so as to facilitate the cleaning, maintenance and replacement of the H type fin.
[0014] 5、 through the setting of the storage plate assembly, when the side push plate is pushed, the second lifting of the lifting frame can be driven synchronously, so as to push out the H type fin in compression state, clean the falling dust inside and block the flue gas at the same time, and the H type fin on the straight pipe can be driven synchronously to loosen and lock, further improving the operation efficiency.
[0015] 6、 through the setting of the cleaning assembly, cooperating with the storage plate assembly for sealing the H type fin in compression state, the H type fin can be automatically cleaned in a relatively sealed environment, thereby improving the automation degree of equipment use and the dust cleaning efficiency of the H type fin. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the right side structure of a single straight pipe of the present application; Figure 3 is a schematic diagram of the left side structure of a single straight pipe of the present application; Figure 4 is a schematic diagram of the structure of the first group of fins and the second group of fins of the present application; Figure 5 is a schematic diagram of the cross-sectional structure of the storage plate box of the present application; Figure 6 is a schematic diagram of the structure of the H type fin on the straight pipe of the present application; Figure 7 is a schematic diagram of the structure of the H type fin of the present application; Figure 8 is a schematic diagram of the structure of the push groove of the present application; Figure 9 is a schematic diagram of the movement simulation structure of the abutment key of the present application.
[0017] Wherein: 10, frame; 11, flue connecting flange; 12, straight pipe; 13, elbow; 14, H-shaped fin; 14a, first group of fins; 14b, second group of fins; 15, sliding frame; 16, abutting key; 17, connecting shaft; 18, push disc; 19, push groove; 20, fixing frame; 21, insertion shaft; 22, rotating groove; 23, convex ball; 24, driving column; 25, helical groove; 26, lifting frame; 27, plate storage box; 28, side push plate; 29, heat insulation pad; 30, lifting frame; 31, insertion hole; 32, guide frame plate; 33, free plate; 34, observation window; 35, upper and lower separation cover; 36, air blower; 37, electric control valve; 38, exhaust pipe; 39, concentrated air pipe; 40, dispersed air pipe; 41, air guide pipe; 42, air pipe interface. DETAILED DESCRIPTION
[0018] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following specific embodiments are further described. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. The experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.
[0019] Embodiment: as Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, a boiler H-shaped finned tube economizer includes a frame 10 with a flue gas passage with front and rear openings, the frame 10 is provided with a flue connection flange 11 for connecting the boiler flue at the end, a plurality of straight tubes 12 are arranged in the frame 10, the straight tubes 12 transversely penetrate the side wall of the frame 10 and are exposed in the flue gas passage, the plurality of straight tubes 12 are connected in series into a medium flow path through the elbow pipe 13, the surface of the elbow pipe 13 is heat insulated, one of which is a fluid medium inlet pipe, the other is a fluid medium outlet pipe, each straight tube 12 is sleeved with two groups of H-shaped fins 14, the H-shaped fin 14 is composed of a pair of fins arranged opposite to each other, one side of the H-shaped fin 14 corresponding to the straight tube 12 is provided with a recessed side wall and abuts against the straight tube 12, the number of each group of H-shaped fins 14 is several, the two groups of H-shaped fins 14 are divided into a first group of fins 14a and a second group of fins 14b, the first group of fins 14a is in a compressed state in the radial direction of the straight tube 12, the second group of fins 14b is in an expanded state in the radial direction of the straight tube 12, the straight tube 12 is provided with a pitch adjusting assembly, the pitch adjusting assembly includes a sliding frame 15 connected to the upper and lower surfaces of the straight tube 12, the side surface and the top surface of the sliding frame 15 are provided with sliding grooves, the sliding grooves in the top surface of the sliding frame 15 are sleeved with connecting shafts 17 corresponding to the positions of the plurality of H-shaped fins 14, the connecting shafts 17 are slidable on the sliding frame 15, the connecting shafts 17 are connected with abutting keys 16 at the top end, the abutting keys 16 are rhombic and the corners are rounded, the connecting shafts 17 are connected with push discs 18 at the bottom end, the abutting keys 16 and the push discs 18 abut against the upper and lower surfaces of the sliding frame 15 respectively, the push disc 18 is provided with a push groove 19 corresponding to one side of the straight tube 12, the push groove 19 is a back-shaped groove, the inner and outer four sides of the push groove 19 are concave inward, the inner and outer four corners of the push groove 19 are rounded, the upper and lower ends of the side surface of the H-shaped fin 14 are provided with connecting protrusions, the connecting protrusions are connected with fixing frames 20 through screws, the fixing frames 20 are connected with plug shafts 21, the plug shafts 21 are sleeved in the push groove 19 and abut against the inner and outer walls of the push groove 19, it should be noted that the abutting keys 16 on the two groups of H-shaped fins 14 have an angle difference of ninety degrees.
[0020] Specifically, the distance adjusting assembly is used to drive the first group of fins 14a to expand the fin spacing in the radial direction of the straight pipe 12, while driving the second group of fins 14b to compress the fin spacing in the radial direction of the straight pipe 12, realizing the alternative switching of the working positions of the first group of fins 14a and the second group of fins 14b, and the reverse driving to realize the reset. When the rotating contact key 16 rotates, the rotating contact key 16 drives the push disc 18 to rotate through the connecting shaft 17, the insertion shaft 21 sleeved on the push groove 19 slides from the four corners of the push groove 19 to the four edges, and in this process, the push groove 19 pushes the fixed frame 20, the fixed frame 20 pushes a pair of fins of the H-shaped fin 14 away from each other, and the fins are separated from the contact with the straight pipe 12 when they are away, so that the fins can easily slide on the straight pipe 12. When the rotating contact key 16 rotates, the occupying amount of the rotating contact key 16 to the transverse space also changes. After the rotating contact key 16 on the first group of fins 14a rotates, the transverse distance of the rotating contact key 16 increases, and the rotating contact keys 16 on the first group of fins 14a push each other, so that a plurality of fins of the first group of fins 14a slide along the straight pipe 12 and the sliding frame 15, and then change from the compressed state to the expanded state. After the rotating contact key 16 on the second group of fins 14b rotates, the transverse distance of the rotating contact key 16 decreases and is pressed by the first group of fins 14a, so that the second group of fins 14b changes from the expanded state to the compressed state. After the rotating contact key 16 rotates more than forty-five degrees, the insertion shaft 21 slides from the four corners of the push groove 19 to the four edges again. In this process, the fixed frame 20 pushes a pair of fins of the H-shaped fin 14 close to each other. After rotating ninety degrees, a pair of fins of the H-shaped fin 14 tightly contact and clamp on the straight pipe 12, improving the stability and heat conductivity. The expanded first group of fins 14a pushes the second group of fins 14b away to one side, so as to separate from the working area. The flue gas passes through the frame 10, and the medium is transmitted in the straight pipe 12 and the elbow pipe 13. The heat of the flue gas is conducted to the medium through the tightly contacted H-shaped fin 14 on the straight pipe 12.
[0021] As shown in Figure 4 , Figure 6 , Figure 7 and Figure 9 , the straight pipe 12 is provided with a driving assembly connected to the distance adjusting assembly for controlling the action of the distance adjusting assembly. The driving assembly includes a rotating groove 22 formed on the side of the rotating contact key 16 away from the straight pipe 12. The inner wall of the rotating groove 22 is connected with a convex ball 23. A driving column 24 with a T-shaped vertical cross section is inserted into the rotating groove 22. A spiral groove 25 is formed on the driving column 24. The convex ball 23 is sleeved in the spiral groove 25. The rotating direction of the spiral groove 25 on each convex ball 23 is opposite to that on the adjacent convex ball 23. That is, when the spiral groove 25 on the middle convex ball 23 is in the clockwise direction, the spiral groove 25 on the adjacent convex ball 23 is in the counterclockwise direction. A plurality of driving columns 24 in the same row are sleeved on a lifting frame 26. The bottom surface of the lifting frame 26 is provided with a T-shaped recess. The end of the driving column 24 in the lifting frame 26 is polygonal.
[0022] Specifically, when the lifting frame 26 is pushed to lift, the driving column 24 is lifted together with the lifting frame 26, the convex ball 23 moves in the spiral groove 25 when the driving column 24 is lifted, the driving column 24 is sleeved in the lifting frame 26 at the end, so that the driving column 24 cannot rotate, and thus the lifting of the driving column 24 will push the convex ball 23 in the spiral groove 25, thereby rotating the abutting key 16, realizing the switching of the expansion or compression state of the first group of fins 14a and the second group of fins 14b, and through the staggered arrangement of the opening direction of the spiral groove 25, as shown in the figure, when the abutting key 16 rotates, the end portions of the abutting keys 16 on the adjacent sides abut each other, so that the friction between the abutting keys 16 is minimized, and the first group of fins 14a or the second group of fins 14b can be more easily expanded or compressed, and when the H-shaped fins 14 change position, the driving column 24 can adapt to the change of position by sliding in the lifting frame 26. Figure 9 As shown in
[0023] As shown in Figure 3 、 Figure 4 and Figure 5 , the frame 10 is provided with a storage plate assembly on both sides, which is used to accommodate the H-shaped fins 14 in the compressed state, and the storage plate assembly includes a storage plate box 27, the number of the storage plate box 27 is several and is connected to the left and right faces of the frame 10 respectively, the positions of the several storage plate boxes 27 correspond to the positions of the several straight pipes 12 respectively, one side of the storage plate box 27 corresponding to one side of the frame 10 is open and communicates with the inside of the frame 10, the front and rear sides of the storage plate box 27 are open and connected with observation windows 34 of transparent material, the upper and lower sides of the storage plate box 27 are open and threadedly connected with upper and lower separation covers 35, it should be noted that the storage plate box 27 and other structures are made of heat insulation material or are heat treated to avoid excessive temperature loss, which is a known technology and will not be described here, one side of the storage plate box 27 outside the frame 10 is open and sleeved with a side push plate 28, a round hole is formed on the side push plate 28 for sleeving the straight pipe 12, a square hole is formed on the side push plate 28 for sleeving the sliding frame 15, a sleeve hole is formed on the side push plate 28 corresponding to the position of the lifting frame 26, a ring groove is formed in the inner wall of the sleeve hole, a lifting frame 30 is sleeved in the ring groove, the center of the lifting frame 30 is open and sleeved in the lifting frame 26, a T-shaped protrusion is arranged on the inner side of the lifting frame 30 and sleeved in the inner wall of the lifting frame 26, heat insulation pads 29 with telescopic property and heat insulation material are connected to the upper and lower sides of the lifting frame 30, a free plate 33 is arranged between the two groups of H-shaped fins 14, the free plate 33 is configured the same as the rotating groove 22, the free plate 33 is also provided with a round hole, a square hole, a sleeve hole, a lifting frame 30 and a heat insulation pad 29, the wall surfaces of the side push plate 28 and the free plate 33 are sealed, for example, rubber pads are arranged to increase the sealing property, the upper and lower inner walls of the left storage plate box 27 are connected with a guide frame plate 32, an insertion hole 31 is formed on the lifting frame 30 and sleeved in the guide frame plate 32, the left and right ends of the guide frame plate 32 are bent away from the straight pipe 12, and the middle part of the guide frame plate 32 is straight.
[0024] Specifically, when the first group of fins 14a expands, it will push the second group of fins 14b into the storage box 27, and vice versa. The H-shaped fins 14 in the storage box 27 can be observed through the observation window 34, so that the state of the H-shaped fins 14 can be judged to determine whether cleaning or replacement is needed. When replacement is needed, the upper and lower split covers 35 are removed from the storage box 27, and the H-shaped fins 14 are removed from the fixing frame 20 for replacement. Finally, the upper and lower split covers 35 are reset, and the left side push plate 28 is pushed to slide the push plate 28 towards the frame 10. During the sliding process of the push plate 28, the lifting frame 30 slides on the guide frame plate 32. When passing the bend at the left end of the guide frame plate 32, the lifting frame 30 rises along the guide frame plate 32 and lifts the lifting frame 26. The lifting frame 26 rotates the contact key 16 by a certain angle. At this time, the pair of fins of the H-shaped fins 14 are first spread apart to separate from the straight pipe 12. Then the push plate 28 is continuously pushed to push the H-shaped fins 14 out of the storage box 27. The second group of fins 14b and the free plate 33 gradually approach the storage box 27. Finally, when passing the bend at the right end of the guide frame plate 32, the lifting frame 26 rotates the contact key 16 by a certain angle. Then the first group of fins 14a completes expansion and clamps the straight pipe 12. The second group of fins 14b completes compression and is pushed into the other storage box 27 by the first group of fins 14a. The free plate 33 moves to the end of the storage box 27. At this time, the two sides of the storage box 27 containing the second group of fins 14b on the right are closed by the push plate 28 and the free plate 33. The second group of fins 14b is sealed in the storage box 27. Conversely, pushing the right side push plate 28, the H-shaped fins 14 can push the previously pushed push plate 28 back to position, so that the first group of fins 14a can be moved to the left storage box 27 for sealing. The free plate 33 prevents flue gas from passing through the closed storage box 27 to improve stability and safety during cleaning or replacement of the H-shaped fins 14.
[0025] As shown in Figure 1 The frame 10 is also provided with a cleaning assembly. The cleaning effect surface of the cleaning assembly points to the inside of the storage plate assembly. The cleaning assembly is used for cleaning the H-shaped fins 14 in the compressed state in the storage plate assembly. The cleaning assembly includes a blower 36 installed on the top of the frame 10. The air outlet of the blower 36 is divided into two parts and connected with an electric control valve 37. The output end of the electric control valve 37 is connected with an exhaust pipe 38. The left and right sides of the top surface of the frame 10 are connected with a concentrated air pipe 39. The concentrated air pipe 39 is connected and communicated with the exhaust pipe 38. The concentrated air pipe 39 is connected and communicated with a dispersed air pipe 40 at positions corresponding to a plurality of columns of straight pipes 12. The top surface of the storage box 27 is provided with an air pipe interface 42. The air pipe interface 42 is connected and communicated with the dispersed air pipe 40 through a gas guide pipe 41.
[0026] Specifically, by controlling the air blower 36 to exhaust air to the storage box 27 on one side, that is, through the electric control valve 37, the exhaust pipe 38, the concentrated air pipe 39, the dispersed air pipe 40 and the air guide pipe 41 to deliver to the storage box 27, the H-shaped fin 14 in the storage box 27 is subjected to air force dust removal. The dust generated by dust removal will temporarily accumulate on the bottom surface of the storage box 27, and then be pushed into the frame 10 from the storage box 27 when the side push plate 28 is pushed, for subsequent removal treatment.
[0027] Working principle: Before use: connect the flue of the boiler through the connecting flange, and the medium that absorbs heat passes through the fluid medium inlet pipe and the fluid medium outlet pipe. The flue gas of the boiler passes through the frame 10, and the heat of the flue gas is conducted to the medium through the close contact of the H-shaped fin 14 on the straight pipe 12.
[0028] In use: first, when the H-shaped fin 14 needs to be replaced, the upper and lower separation covers 35 are removed from the storage box 27, and then the H-shaped fin 14 is removed from the fixed frame 20, and finally the upper and lower separation covers 35 are reset.
[0029] Second step, when the H-shaped fin 14 needs to be switched for heat exchange, the left side push plate 28 is pushed. The lifting frame 30 slides on the guide frame plate 32 in the process of sliding. When passing through the bend at the left end of the guide frame plate 32, the lifting frame 30 rises along the guide frame plate 32 and lifts the lifting frame 26, which drives the abutting key 16 to rotate by a certain angle. At this time, a pair of fins of the H-shaped fin 14 first spread apart from the straight pipe 12, and then the side push plate 28 is continuously pushed to push the H-shaped fin 14 out of the storage box 27. The second group of fins 14b and the free plate 33 gradually approach the storage box 27. Finally, when passing through the bend at the right end of the guide frame plate 32, the lifting frame 26 allows the abutting key 16 to rotate by a certain angle again. The first group of fins 14a completes expansion and clamps the straight pipe 12, and the second group of fins 14b completes compression. The second group of fins 14b is pushed into the storage box 27 on the other side by the first group of fins 14a, and the free plate 33 moves to the end of the storage box 27. At this time, the storage box 27 containing the second group of fins 14b on the right side is closed by the side push plate 28 and the free plate 33 respectively. The second group of fins 14b is stored in the storage box 27. Conversely, pushing the right side push plate 28, the H-shaped fin 14 can push the original pushed side push plate 28 to reset, that is, the first group of fins 14a can be moved to the left side storage box 27 for storage.
[0030] Third step, control the air blower 36 to exhaust air to the storage box 27 on one side, and the H-shaped fin 14 in the storage box 27 is subjected to air force dust removal. The dust generated by dust removal will temporarily accumulate on the bottom surface of the storage box 27, and then be pushed into the frame 10 from the storage box 27 when the side push plate 28 is pushed, for subsequent removal treatment.
[0031] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the embodiments, and various changes can be made by those skilled in the art within the scope of knowledge acquired from the present disclosure, without departing from the spirit of the present application.
Claims
1. An H-type fin tube economizer for a boiler, comprising a frame (10) having a flue gas passage with front and rear openings, a flue connecting flange (11) for connecting to a boiler flue being provided at an end of the frame (10), characterized in that: A plurality of straight tubes (12) are arranged in the frame (10), and the straight tubes (12) pass through the side wall of the frame (10) transversely and are exposed in the smoke channel. The plurality of straight tubes (12) are connected in series through the bend tube (13) to form a medium flow path, one of which is a fluid medium inlet pipe and the other is a fluid medium outlet pipe. Two groups of H-shaped fins (14) are sleeved on each straight tube (12), and the H-shaped fins (14) are composed of a pair of fins arranged opposite to each other. The H-shaped fins (14) are provided with a concave side wall on one side corresponding to the straight tube (12) and are in contact with the straight tube (12). The number of each group of H-shaped fins (14) is several, and the two groups of H-shaped fins (14) are divided into a first group of fins (14a) and a second group of fins (14b). The first group of fins (14a) is in a compressed state in the radial direction of the straight tube (12), and the second group of fins (14b) is in a compressed state in the radial direction of the straight tube (12). In the radial expansion state, a distance adjustment component is provided on the straight tube (12), and the distance adjustment component is used to drive the first group of fins (14a) to expand the fin spacing in the radial direction of the straight tube (12), and at the same time drive the second group of fins (14b) to compress the fin spacing in the radial direction of the straight tube (12), so as to realize the alternating switching of the working positions of the first group of fins (14a) and the second group of fins (14b), and can be driven in reverse to realize reset. A driving component is provided on the straight tube (12), and the driving component is connected to the distance adjustment component to control the action of the distance adjustment component. Storage plate components are provided on both sides of the frame (10), and the storage plate components are used to accommodate the H-type fins (14) in a compressed state. A cleaning component is also provided on the frame (10), and the cleaning component acts on the inside of the storage plate component. The cleaning component is used to clean the H-type fins (14) in a compressed state accommodated in the storage plate component.
2. The H-type fin tube economizer for a boiler according to claim 1, characterized in that: The distance adjustment component includes a slide frame (15), the slide frame (15) is connected to the upper and lower surfaces of the straight tube (12), and the side and top surfaces of the slide frame (15) are provided with slide grooves. The positions of the slide grooves on the top surface of the slide frame (15) corresponding to the H-shaped fins (14) are sleeved with connecting shafts (17), the top end of the connecting shaft (17) is connected to a contact key (16), and the bottom end of the connecting shaft (17) is connected to a push plate (18), and the contact key (16) and the push plate (18) respectively contact the upper and lower surfaces of the slide frame (15). A push groove (19) is provided on one side of the push plate (18) corresponding to the straight tube (12), and the push groove (19) is a circular groove. The inner and outer sides of the push groove (19) are all concave inward, and the inner and outer corners of the push groove (19) are all rounded. The upper and lower ends of the side of the H-shaped fin (14) are provided with connecting protrusions, and the connecting protrusions are connected to the fixing frame (20) by screws. The fixing frame (20) is connected to an insert shaft (21), and the insert shaft (21) is sleeved on the push groove (19) and contacts the inner and outer walls of the push groove (19).
3. The H-type fin tube economizer for a boiler according to claim 2, characterized in that: The driving assembly includes a rotating groove (22), which is provided on a side of the abutting key (16) facing away from the straight tube (12), a convex ball (23) is connected to the inner wall of the rotating groove (22), a driving column (24) is inserted into the rotating groove (22), a spiral groove (25) is provided on the driving column (24), and the convex ball (23) is inserted into the spiral groove (25), and a plurality of driving columns (24) in the same row are sleeved on a lifting frame (26), and a groove is provided on the bottom surface of the lifting frame (26).
4. The H-type fin tube economizer for a boiler according to claim 3, characterized in that: The spiral groove (25) on each convex ball (23) rotates in opposite directions to the spiral groove (25) on the adjacent convex ball (23), that is, when the spiral groove (25) on the middle convex ball (23) rotates in a clockwise direction, the spiral groove (25) on the adjacent convex ball (23) rotates in a counterclockwise direction.
5. The H-type fin tube economizer for a boiler according to claim 3, characterized in that: The board storage assembly includes a board storage box (27), the number of which is several and which are respectively connected to the left and right sides of the frame (10), the positions of the several board storage boxes (27) respectively corresponding to the positions of the several straight tubes (12), the board storage box (27) is open on one side corresponding to the frame (10) and is connected to the inside of the frame (10), the front and rear sides of the board storage box (27) are open and connected to an observation window (34) made of a transparent material, and the upper and lower sides of the board storage box (27) are open and are threadedly connected to an upper and lower separation cover (35).
6. The H-type fin tube economizer for a boiler according to claim 5, characterized in that: The storage board assembly also includes a side push plate (28), one side of the storage board box (27) outside the back frame (10) is open and the side push plate (28) is sleeved, a round hole is opened on the side push plate (28) for being sleeved on the straight tube (12), a square hole is opened on the side push plate (28) for being sleeved on the sliding frame (15), a sleeve hole is opened on the side push plate (28) at a position corresponding to the lifting frame (26), an annular groove is opened in the middle of the inner wall of the sleeve hole, a lifting frame (30) is sleeved in the annular groove, and the lifting frame (30) has a central opening and is sleeved on the lifting frame (26).
7. The H-type fin tube economizer for a boiler according to claim 6, characterized in that: A free plate (33) is provided between the two groups of H-shaped fins (14). The free plate (33) has the same configuration as the rotating groove (22). The free plate (33) is also provided with a round hole, a square hole, a sleeve hole, a lifting frame (30) and a heat insulation pad (29).
8. The H-type fin tube economizer for a boiler according to claim 7, characterized in that: The board storage assembly further includes a guide frame plate (32), which is connected to the upper and lower inner walls of the board storage box (27) on the left side. A socket (31) is provided on the lifting frame (30) and is sleeved on the guide frame plate (32). The left and right ends of the guide frame plate (32) are bent in a direction away from the straight tube (12), and the middle part of the guide frame plate (32) is straight.
9. The H-type fin tube economizer for a boiler according to claim 7, characterized in that: The cleaning component includes a blower (36), which is installed on the top of the frame (10). The air outlet of the blower (36) is divided into two and both are connected to an electric control valve (37). The output end of the electric control valve (37) is connected to an exhaust pipe (38). The left and right sides of the top surface of the frame (10) are connected to a centralized air duct (39). The centralized air duct (39) is connected and communicated with the exhaust pipe (38). The positions corresponding to the plurality of rows of straight pipes (12) on the centralized air duct (39) are connected and communicated with a dispersed air duct (40). The top surface of the storage box (27) is opened and an air duct interface (42) is installed. The air duct interface (42) is connected and communicated with the dispersed air duct (40) through an air guide pipe (41).