A boiler flue gas waste heat recovery device

Abstract

The utility model provides a boiler flue gas waste heat recovery device, including a heat exchange box, a detachable box cover is installed on the upper end of the heat exchange box, a plurality of serpentine tubes are equidistantly arranged from top to bottom in the heat exchange box, both ends of the serpentine tubes pass through the heat exchange box and extend to the outside of the heat exchange box, a side surface of the heat exchange box is provided with a smoke exhaust pipe for installation on the boiler smoke exhaust port, the end of the smoke exhaust pipe away from the boiler smoke exhaust port is closed, a plurality of branch pipes matching with the serpentine tube are equidistantly installed from the upper side to the bottom on the outer surface of the smoke exhaust pipe, the end of the branch pipe away from the smoke exhaust pipe is connected and fixed with a first flange, the end of the serpentine tube close to the branch pipe is connected and fixed with a second flange matching with the first flange, the first flange and the second flange are connected by a clamping member, and the utility model has the following beneficial effects: reducing the amount of screws used in the assembly process and facilitating disassembly and assembly.

Description

Technical Field

[0001] The utility model relates to a boiler flue gas waste heat recovery device, belonging to the technical field of boiler waste heat recovery. Background Art

[0002] There is a lot of heat in the boiler flue gas, and heat exchange is often used to recover and reuse the heat in the boiler flue gas. In order to facilitate the exhaust flue gas to fully contact with moisture and exchange heat, a plurality of serpentine tubes with smaller diameters are usually evenly arranged in the heat exchange box, and a plurality of branch pipes with smaller diameters are installed on the exhaust pipe on the boiler exhaust port. After the plurality of branch pipes are respectively connected to the plurality of serpentine tubes, it is convenient for the flue gas to enter the plurality of serpentine tubes, so that the flue gas in the plurality of serpentine tubes can simultaneously exchange heat with the moisture in the heat exchange box. In this method, it is necessary to use a plurality of screws and nuts to connect the flanges on the branch pipes and the serpentine tubes. Therefore, when a plurality of serpentine tubes are connected to each other, a large number of screws and nuts are used, resulting in low disassembly and assembly efficiency. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a boiler flue gas waste heat recovery device to solve the problems raised in the above-mentioned background technology. The utility model reduces the number of screws used in the assembly process and facilitates disassembly and assembly.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a boiler flue gas waste heat recovery device comprises a heat exchange box, a detachable box cover is installed at the upper end of the heat exchange box, a plurality of serpentine pipes are arranged equidistantly from top to bottom in the heat exchange box, both ends of the serpentine pipes pass through the heat exchange box and extend to the outside of the heat exchange box, a water inlet interface is installed at the lower position of one side of the heat exchange box, a water outlet interface is provided on the upper side of the water inlet interface, one end of the water outlet interface is connected and communicated with the heat exchange box, a smoke exhaust pipe for installation on the boiler exhaust port is provided on one side of the heat exchange box, the end of the smoke exhaust pipe away from the boiler exhaust port is closed, and a plurality of branch pipes matching with the serpentine pipe are equidistantly installed from upper side to lower side on the outer surface of the smoke exhaust pipe, the end of the branch pipe away from the smoke exhaust pipe is connected and fixed with a first flange, and the end of the serpentine pipe close to the branch pipe is connected and fixed with a second flange matching with the first flange, and the first flange and the second flange are connected by a clamp.

[0005] Furthermore, the clamping member includes a left clamping plate, a left clamping plate is provided on a side of the heat exchange box close to the smoke exhaust pipe, a right clamping plate is provided on a side of the left clamping plate away from the heat exchange box, a side of the left clamping plate facing the right clamping plate and a side of the right clamping plate facing the left clamping plate are both provided with a plurality of equidistantly arranged positioning notches, a side of the left clamping plate away from the right clamping plate and a side of the right clamping plate away from the left clamping plate are both provided with a plurality of equidistantly arranged through-slot openings, the through-slot openings are communicated with the positioning notches, the serpentine tube is inserted into the through-slot openings on the left clamping plate, and the second flange Inserted in the positioning notch on the left splint, the branch pipe is inserted in the through-slotted slot opened in the right splint, the first flange is inserted in the positioning notch on the right splint, a sealing gasket is installed between the first flange and the second flange, the two ends of the left splint are respectively connected and fixed with the two ends of the right splint by a set of screws and nuts, the opening end of the positioning notch on the left splint is opposite to the opening end of the positioning notch on the right splint, and the opening end of the through-slotted slot on the left splint is opposite to the opening end of the through-slotted slot on the right splint.

[0006] Furthermore, both ends of the left clamping plate are provided with left small holes, and both ends of the right clamping plate are provided with right small holes aligned with the left small holes. Screws are inserted in the channels formed by the left and right small holes, and one end of the screws is threadedly connected with a nut.

[0007] Furthermore, the left clamping plate has two end positions on the side facing the right clamping plate, and the right clamping plate has two end positions on the side facing the left clamping plate, and the right clamping plate has two end positions on the side facing the left clamping plate, and the left small hole is connected to the left step groove, and the right small hole is connected to the right step groove.

[0008] Furthermore, connecting strips are connected and fixed at the upper edges of two parallel sides of the heat exchange box, the box cover is connected and fixed to the connecting strips by bolts, and a sealing frame is connected and fixed to the lower surface of the box cover, and the sealing frame is inserted in the heat exchange box and fits against the inner wall of the heat exchange box.

[0009] Furthermore, a side surface of the heat exchange box adjacent to the water inlet interface is equidistantly provided with a plurality of first perforations, a side of the heat exchange box away from the first perforations is equidistantly provided with a plurality of second perforations, and both ends of the serpentine tube respectively penetrate the first perforations and the second perforations.

[0010] Beneficial effects of the utility model:

[0011] 1. Insert one ends of the plurality of serpentine tubes into the plurality of through-slot openings on the left clamping plate respectively, and clamp the second flange on the serpentine tube into the positioning notch on the left clamping plate, then insert the plurality of branch tubes into the plurality of through-slot openings on the right clamping plate respectively, and clamp the first flange into the positioning notch on the right clamping plate, and connect the left clamping plate and the right clamping plate by using two sets of screws and nuts. Since the positioning notch on the left clamping plate and the positioning notch on the right clamping plate face opposite directions, the relative position of the branch tube and the serpentine tube is restricted after the left clamping plate and the right clamping plate are connected, so that the connection between the plurality of serpentine tubes and the plurality of branch tubes can be completed by using two sets of screws and nuts, thereby reducing the number of screws and nuts used and facilitating disassembly and assembly.

[0012] 2. A left step groove is opened on the left splint, and a right step groove is opened on the right splint. After the screws and nuts are assembled, the parts of the screws in the left step groove and the right step groove are exposed. When the screws and nuts cannot be separated normally due to rust, the space formed by the left step groove and the right step groove can be used to cut off the screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the structure of a boiler flue gas waste heat recovery device of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of a boiler flue gas waste heat recovery device from another perspective of the utility model;

[0016] Figure 3 It is a schematic diagram of the assembly of a serpentine pipe, a smoke exhaust pipe and a heat exchange box in a boiler flue gas waste heat recovery device of the utility model;

[0017] Figure 4 It is a schematic diagram of the assembly of a serpentine pipe and a smoke exhaust pipe in a boiler flue gas waste heat recovery device of the utility model;

[0018] Figure 5 It is a three-dimensional diagram of a heat exchange box in a boiler flue gas waste heat recovery device of the utility model;

[0019] Figure 6 It is a schematic diagram of the assembly of the branch pipe and the exhaust pipe in a boiler flue gas waste heat recovery device of the utility model;

[0020] Figure 7 It is a three-dimensional diagram of a serpentine pipe in a boiler flue gas waste heat recovery device of the utility model;

[0021] Figure 8 It is a three-dimensional diagram of the left clamping plate in a boiler flue gas waste heat recovery device of the utility model;

[0022] Fig. 9 It is a three-dimensional diagram of the right clamping plate in a boiler flue gas waste heat recovery device of the utility model;

[0023] Fig.10 It is a schematic diagram of the assembly of a sealing frame and a box cover in a boiler flue gas waste heat recovery device of the utility model;

[0024] In the figure: 1-heat exchange box, 2-water inlet interface, 3-water outlet interface, 4-box cover, 5-left clamping plate, 6-screws, 7-smoke exhaust pipe, 8-branch pipe, 9-right clamping plate, 10-nuts, 11-serpentine pipe, 12-connecting strip, 13-first perforation, 14-second perforation, 15-first flange, 16-second flange, 17-left stepped groove, 18-left small hole, 19-positioning notch, 20-slotting notch, 21-right stepped groove, 22-right small hole, 23-sealing frame. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 and Fig.10 The utility model provides a technical solution: a boiler flue gas waste heat recovery device, including a heat exchange box 1, a detachable box cover 4 is installed on the upper end of the heat exchange box 1, wherein the upper edges of two parallel side surfaces of the heat exchange box 1 are connected and fixed with connecting strips 12, the box cover 4 is connected and fixed to the connecting strips 12 by bolts, and a sealing frame 23 is connected and fixed to the lower surface of the box cover 4, the sealing frame 23 is inserted in the heat exchange box 1 and fits with the inner wall of the heat exchange box 1, and the sealing frame 23 improves the sealing of the connection between the box cover 4 and the heat exchange box 1.

[0027] See also Figure 1-Figure 5 A plurality of serpentine tubes 11 are arranged equidistantly from top to bottom in the heat exchange box 1, and both ends of the serpentine tubes 11 penetrate the heat exchange box 1 and extend to the outside of the heat exchange box 1, wherein a plurality of first through-holes 13 are equidistantly provided on a side of the heat exchange box 1 adjacent to the water inlet interface 2, and a plurality of second through-holes 14 are equidistantly provided on a side of the heat exchange box 1 away from the first through-holes 13, and both ends of the serpentine tubes 11 penetrate the first through-holes 13 and the second through-holes 14 respectively, and the first through-holes 13 and the second through-holes 14 provide space for the installation of the serpentine tubes 11, and a water inlet interface 2 is installed at the lower part of one side of the heat exchange box 1, and a water outlet interface 3 is provided on the upper side of the water inlet interface 2, and one end of the water outlet interface 3 is connected and communicated with the heat exchange box 1.

[0028] See also Figure 1-Figure 9A smoke exhaust pipe 7 for installation on the smoke exhaust port of the boiler is provided on one side of the heat exchange box 1. The end of the smoke exhaust pipe 7 away from the smoke exhaust port of the boiler is closed. A plurality of branch pipes 8 matching the serpentine pipe 11 are equidistantly installed from the upper side to the lower side of the outer surface of the smoke exhaust pipe 7. The end of the branch pipe 8 away from the smoke exhaust pipe 7 is connected and fixed with a first flange 15. The end of the serpentine pipe 11 close to the branch pipe 8 is connected and fixed with a second flange 16 matching the first flange 15. A left clamping plate 5 is provided on the side of the heat exchange box 1 close to the smoke exhaust pipe 7. A right clamping plate 9 is provided on the side of the left clamping plate 5 away from the heat exchange box 1. The side of the left clamping plate 5 facing the right clamping plate 9 and the side of the right clamping plate 9 facing the left clamping plate 5 are both open. A plurality of equally spaced positioning notches 19 are provided, and a plurality of equally spaced slots 20 are provided on one side of the left splint 5 facing away from the right splint 9 and on one side of the right splint 9 facing away from the left splint 5. The slots 20 are communicated with the positioning notches 19, the serpentine tube 11 is inserted in the slots 20 on the left splint 5, the second flange 16 is inserted in the positioning notch 19 on the left splint 5, the branch pipe 8 is inserted in the slots 20 provided on the right splint 9, the first flange 15 is inserted in the positioning notch 19 on the right splint 9, and a sealing gasket is installed between the first flange 15 and the second flange 16 to improve the sealing between the branch pipe 8 and the serpentine tube 11.

[0029] See also Figure 1-Figure 9 , the two ends of the left splint 5 are respectively connected and fixed with the two ends of the right splint 9 by a set of screws 6 and nuts 10, wherein both ends of the left splint 5 are provided with left small holes 18, and both ends of the right splint 9 are provided with right small holes 22 aligned with the left small holes 18, and the screws 6 are inserted in the channel formed by the left small holes 18 and the right small holes 22, and one end of the screw 6 is threadedly connected with the nut 10, the opening end of the positioning notch 19 on the left splint 5 is opposite to the opening end of the positioning notch 19 on the right splint 9, and the opening end of the slotting opening 20 on the left splint 5 is opposite to the opening end of the slotting opening 20 on the right splint 9, so that one end of the multiple serpentine tubes 11 are respectively inserted into the multiple slotting openings 20 on the left splint 5, and the ... The second flange 16 on the serpentine tube 11 is clamped in the positioning notch 19 on the left clamping plate 5, and then the multiple branch pipes 8 are respectively inserted into the multiple through-slot holes 20 on the right clamping plate 9, and the first flange 15 is clamped in the positioning notch 19 on the right clamping plate 9, and the left clamping plate 5 and the right clamping plate 9 are connected by two sets of screws 6 and nuts 10. Because the positioning notch 19 on the left clamping plate 5 and the positioning notch 19 on the right clamping plate 9 are in opposite directions, after the left clamping plate 5 and the right clamping plate 9 are connected, the relative position of the branch pipe 8 and the serpentine tube 11 is restricted, and the connection between the multiple serpentine tubes 11 and the multiple branch pipes 8 can be completed by using two sets of screws 6 and nuts 10, reducing the number of screws 6 and nuts 10 used, which is convenient for disassembly and assembly.

[0030] See also Figure 1 , Figure 2 , Figure 8 and Fig. 9 , left stepped grooves 17 are provided at both end positions of the side of the left clamping plate 5 facing the right clamping plate 9, right stepped grooves 21 aligned with the left stepped grooves 17 are provided at both end positions of the side of the right clamping plate 9 facing the left clamping plate 5, the left small hole 18 is communicated with the left stepped groove 17, and the right small hole 22 is communicated with the right stepped groove 21. The left stepped groove 17 is provided on the left clamping plate 5, and the right stepped groove 21 is provided on the right clamping plate 9. After the screw 6 and the nut 10 are assembled, the parts of the screw 6 in the left stepped groove 17 and the right stepped groove 21 are exposed. When the screw 6 and the nut 10 cannot be separated normally due to rust, the space formed by the left stepped groove 17 and the right stepped groove 21 can be used to cut off the screw 6.

[0031] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A boiler flue gas waste heat recovery device, comprising a heat exchange box (1), characterized in that: A detachable box cover (4) is installed at the upper end of the heat exchange box (1), and a plurality of serpentine tubes (11) are arranged equidistantly from top to bottom in the heat exchange box (1), and both ends of the serpentine tubes (11) penetrate the heat exchange box (1) and extend to the outside of the heat exchange box (1). A water inlet interface (2) is installed at the lower part of one side of the heat exchange box (1), and a water outlet interface (3) is provided on the upper side of the water inlet interface (2), and one end of the water outlet interface (3) is connected to and communicates with the heat exchange box (1). A water outlet interface (3) is provided on one side of the heat exchange box (1) for installation at the smoke exhaust port of the boiler. A smoke exhaust pipe (7) is provided on the boiler, wherein the end of the smoke exhaust pipe (7) away from the smoke exhaust port of the boiler is closed, and a plurality of branch pipes (8) matching with the serpentine pipe (11) are equidistantly installed from the upper side to the lower side of the outer surface of the smoke exhaust pipe (7), and the end of the branch pipe (8) away from the smoke exhaust pipe (7) is connected and fixed with a first flange (15), and the end of the serpentine pipe (11) close to the branch pipe (8) is connected and fixed with a second flange (16) matching with the first flange (15), and the first flange (15) and the second flange (16) are connected by a clamp.

2. A boiler flue gas waste heat recovery device according to claim 1, characterized in that: The clamping member comprises a left clamping plate (5), a left clamping plate (5) is provided on a side of the heat exchange box (1) close to the smoke exhaust pipe (7), a right clamping plate (9) is provided on a side of the left clamping plate (5) facing away from the heat exchange box (1), a plurality of equally spaced positioning notches (19) are provided on a side of the left clamping plate (5) facing the right clamping plate (9) and a side of the right clamping plate (9) facing the left clamping plate (5), a plurality of equally spaced through slots (20) are provided on a side of the left clamping plate (5) facing away from the right clamping plate (9) and a side of the right clamping plate (9) facing away from the left clamping plate (5), the through slots (20) are communicated with the positioning notches (19), the serpentine tube (11) is inserted into the through slots (20) on the left clamping plate (5), and the second flange (16) is inserted into the through slots (20) on the left clamping plate (5). The branch pipe (8) is inserted into the positioning notch (19) on the left clamping plate (5) and the through-slotted slot (20) on the right clamping plate (9). The first flange (15) is inserted into the positioning notch (19) on the right clamping plate (9). A sealing gasket is installed between the first flange (15) and the second flange (16). The two ends of the left clamping plate (5) are respectively connected and fixed to the two ends of the right clamping plate (9) by a group of screws (6) and nuts (10). The opening end of the positioning notch (19) on the left clamping plate (5) faces opposite to the opening end of the positioning notch (19) on the right clamping plate (9). The opening end of the through-slotted slot (20) on the left clamping plate (5) faces opposite to the opening end of the through-slotted slot (20) on the right clamping plate (9).

3. A boiler flue gas waste heat recovery device according to claim 2, characterized in that: Both ends of the left clamping plate (5) are provided with left small holes (18), and both ends of the right clamping plate (9) are provided with right small holes (22) aligned with the left small holes (18). A screw (6) is inserted into the channel formed by the left small hole (18) and the right small hole (22), and one end of the screw (6) is threadedly connected with a nut (10).

4. A boiler flue gas waste heat recovery device according to claim 3, characterized in that: The left clamping plate (5) has two end positions on the side facing the right clamping plate (9) with a left stepped groove (17), and the right clamping plate (9) has two end positions on the side facing the left clamping plate (5) with a right stepped groove (21) aligned with the left stepped groove (17). The left small hole (18) is in communication with the left stepped groove (17), and the right small hole (22) is in communication with the right stepped groove (21).

5. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The upper edges of two parallel side surfaces of the heat exchange box (1) are both connected and fixed with connecting strips (12); the box cover (4) is connected and fixed to the connecting strips (12) by bolts; a sealing frame (23) is connected and fixed to the lower surface of the box cover (4); the sealing frame (23) is inserted into the heat exchange box (1) and fits against the inner wall of the heat exchange box (1).

6. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: A side surface of the heat exchange box (1) adjacent to the water inlet interface (2) is provided with a plurality of first through holes (13) at equal intervals, a side surface of the heat exchange box (1) away from the first through holes (13) is provided with a plurality of second through holes (14) at equal intervals, and both ends of the serpentine tube (11) respectively penetrate the first through holes (13) and the second through holes (14).

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