Heat exchange tube assembly for flue gas reheater

Abstract

The utility model discloses a heat exchange tube component for a flue gas reheater, which comprises mounting partition plates connected to two sides of the inner wall of a cylinder of the flue gas reheater, the mounting partition plates on two sides are respectively connected with a gas inlet cylinder and a gas exhaust cylinder, a heat exchange tube is connected between the mounting partition plates on two sides, and the heat exchange tube comprises a plurality of straight tubes. A U-shaped pipe is connected between the ends of every two adjacent straight pipes, first connecting rings are connected to the outer walls of the two ends of the U-shaped pipe, second connecting rings are connected to the outer walls of the ends of the straight pipes, fixing pipes are connected to the installation partition plates on the two sides, connecting bases are connected to the outer walls of the fixing pipes, and transverse pipes are connected to the ends of the straight pipes located at the two ends. A plurality of sliding grooves are formed in the outer wall of the mounting cylinder, a plurality of sliding blocks are slidably connected into the sliding grooves, movable connecting circular rings are connected between the ends of the sliding blocks, a driving cylinder is fixedly connected to the outer wall of each movable connecting circular ring, a cylinder is rotationally connected to the driving cylinder, and the inner wall of each cylinder is in threaded connection to the outer wall of the corresponding connecting base.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas reheater equipment components, and in particular relates to a heat exchange tube component for a flue gas reheater. Background Art

[0002] Flue gas reheater can realize waste heat recycling by heat exchange with gas medium. It is a commonly used supporting equipment in wet desulfurization and denitrification system of thermal power plant. It can help to recover a large amount of heat energy of coal combustion cracking flue gas for utilization, reduce thermal pollution and heat loss. Flue gas reheater has the advantages of heat energy recycling, pollution reduction and white smoke plume reduction. However, since the treated flue gas mostly contains dust and sulfur dioxide, it is easy to cause dust accumulation, blockage and corrosion inside after a period of use, which also affects the life of flue gas reheater.

[0003] In daily use, it is necessary to always pay attention to the cleaning, dust removal and corrosion prevention of the equipment. The heat exchange tube assembly in the prior art is usually set as a U-shaped heat exchange tube or a plate-fin heat exchange tube, which is difficult to clean inside and difficult to maintain. The U-shaped heat exchange tube or the U-shaped tube in the middle bend is easily damaged, has a short service life, and has a high cost when replaced, which is not conducive to long-term use. In addition, the installation and disassembly process of the connecting tubes at both ends of the heat exchange tube is cumbersome, and it is difficult to disassemble and install during cleaning, which will reduce the cleaning efficiency. Utility Model Content

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a heat exchange tube assembly for a flue gas reheater.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A heat exchange tube assembly for a flue gas reheater, comprising mounting baffles connected to both sides of the inner wall of a flue gas reheater cylinder, the mounting baffles on both sides are respectively connected to an air inlet pipe and an exhaust pipe, a heat exchange tube is connected between the mounting baffles on both sides, the heat exchange tube comprises a plurality of straight tubes, a U-shaped tube is connected between the ends of two adjacent straight tubes, both ends of the U-shaped tube are connected to a first connecting ring, the outer wall of the end of the straight tube is connected to a second connecting ring, and a plurality of bolts are connected between the first connecting ring and the second connecting ring;

[0007] The mounting partitions on both sides are connected to fixed tubes, the outer walls of the fixed tubes are connected to connecting seats, the ends of the straight tubes at both ends are connected to transverse tubes, the outer walls of the shaft bodies of the ends of the transverse tubes are threadedly connected to mounting tubes, the outer walls of the mounting tubes are provided with a plurality of sliding grooves, a plurality of sliders are slidably connected in the sliding grooves, a movable connecting ring is connected between the ends of the plurality of sliders, the outer walls of the movable connecting rings are fixedly connected to a driving cylinder, the driving cylinder is rotatably connected to a cylinder, and the inner wall of the cylinder is threadedly connected to the outer wall of the connecting seat.

[0008] It is further defined that a first sealing rubber ring is connected to the inner wall of the end portion of the first connecting ring, a rubber protrusion is connected to one side of the first sealing rubber ring, a second sealing rubber ring is connected to the inner wall of the end portion of the second connecting ring, and the second sealing rubber ring is provided with a groove adapted to fit the rubber protrusion. Such a structural design can strengthen the connection sealing between the first connecting ring and the second connecting ring at multiple levels.

[0009] It is further defined that a U-shaped limit block is clamped on the inner wall of the flue gas reheater cylinder at a position corresponding to the protrusion of the U-shaped tube, plug blocks are provided at both ends of the U-shaped limit block, and a slot for adapting the plug block is provided on the inner wall of the flue gas reheater cylinder. Such a structural design can further fix and install the U-shaped tube to achieve the effect of quick pre-installation, and the connection method is simple and easy to operate.

[0010] It is further defined that the slider is arranged in a dovetail shape, and the edge corners are rounded. Such a structural design can prevent the slider from falling out of the slide groove and make the slider slide more smoothly.

[0011] It is further defined that a matching third sealing rubber ring is connected to the end of the mounting tube, and the third sealing rubber ring is located on the outer wall of the connection between the fixed tube and the cross tube port. Such a structural design can enhance the connection sealing between the fixed tube and the cross tube.

[0012] The beneficial effects of the utility model are:

[0013] 1. The heat exchange tubes in the utility model include a plurality of straight tubes and U-shaped tubes. Such a split design facilitates the subsequent cleaning and replacement of a single straight tube and a U-shaped tube, thereby reducing the cost of maintenance and replacement, and improving the maintenance and cleaning efficiency and utilization rate;

[0014] 2. In addition, the fixed pipe connection connecting seat, the cross pipe connection mounting tube, the slide groove, the slider, the movable connecting ring, the driving tube and the cylinder and other connecting components, the cooperation of each component can conveniently and quickly connect the cross pipe to the fixed pipe, and a multi-layer protection structure is formed on the outer wall of the connecting port between the cross pipe and the fixed pipe, which can achieve the effect of convenient installation and disassembly while enhancing the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 It is a schematic cross-sectional view of the overall structure of an embodiment of a heat exchange tube assembly for a flue gas reheater of the utility model;

[0017] Figure 2 The utility model is a heat exchange tube assembly for a flue gas reheater. Figure 1 The structural diagram of A in FIG.

[0018] Figure 3 The utility model is a heat exchange tube assembly for a flue gas reheater. Figure 1 Schematic diagram of the structure at B.

[0019] The main component symbols are described as follows:

[0020] Flue gas reheater cylinder 1, installation partition 101, air inlet cylinder 102, exhaust cylinder 103;

[0021] Heat exchange tube 2, straight tube 201, second connecting ring 2011, second sealing rubber ring 2012, U-shaped tube 202, first connecting ring 2021, first sealing rubber ring 2022, rubber protrusion 2023, bolt 203, U-shaped limit block 204;

[0022] Fixed pipe 3, connecting seat 301;

[0023] The horizontal tube 4, the installation cylinder 401, the third sealing rubber ring 4011, the slide groove 402, the slider 403, the movable connecting ring 404, the driving cylinder 4041, and the cylinder 405. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1-3 As shown, a heat exchange tube assembly for a flue gas reheater of the utility model comprises mounting baffles 101 connected to both sides of the inner wall of a flue gas reheater cylinder 1, the mounting baffles 101 on both sides are respectively connected to an air inlet pipe 102 and an exhaust pipe 103, a heat exchange tube 2 is connected between the mounting baffles 101 on both sides, the heat exchange tube 2 comprises a plurality of straight tubes 201, a U-shaped tube 202 is connected between the ends of two adjacent straight tubes 201, both ends of the U-shaped tube 202 are connected to the outer walls thereof with a first connecting ring 2021, the outer walls of the ends of the straight tubes 201 are connected to the second connecting ring 2011, and a plurality of bolts 203 are connected between the first connecting ring 2021 and the second connecting ring 2011;

[0026] The partitions 101 installed on both sides are connected to the fixed tubes 3, the outer walls of the fixed tubes 3 are connected to the connecting seats 301, the ends of the straight tubes 201 at both ends are connected to the transverse tubes 4, the outer walls of the shaft bodies at the ends of the transverse tubes 4 are threadedly connected to the mounting cylinders 401, the outer walls of the mounting cylinders 401 are provided with a plurality of slide grooves 402, a plurality of sliders 403 are slidably connected in the slide grooves 402, a movable connecting ring 404 is connected between the ends of the plurality of sliders 403, the outer walls of the movable connecting rings 404 are fixedly connected to the driving cylinder 4041, the driving cylinder 4041 is rotatably connected to the cylinder 405, and the inner wall of the cylinder 405 is threadedly connected to the outer wall of the connecting seat 301.

[0027] In the embodiment of the present case, the heat exchange tube 2 includes a plurality of straight tubes 201 and U-shaped tubes 202. During installation, the first connecting ring 2021 and the second connecting ring 2011 are connected and fixed by bolts 203. At this time, each straight tube 201 is connected to each corresponding U-shaped tube 202. Such a structural design facilitates the subsequent cleaning and replacement and maintenance of a single straight tube 201 and U-shaped tube 202, thereby improving the maintenance and cleaning efficiency.

[0028] Among them, when connecting the two end transverse tubes 4 to the fixed tube 3, it is first necessary to thread the installation cylinder 401 to the outside of the end of the transverse tube 4, and then rotate the cylinder 405. When the cylinder 405 rotates, the inner wall is threadedly connected to the outer wall of the connecting seat 301. During the connection process, the cylinder 405 drives the cylinder 4041, the movable connecting ring 404 and the slider 403 to move along the slide groove 402. This structural design facilitates the rapid connection of the transverse tube 4 to the fixed tube 3, and forms a multi-layer external protection structure on the outer wall of the connection port between the transverse tube 4 and the fixed tube 3, which can achieve the effect of convenient installation and disassembly while enhancing the sealing.

[0029] Preferably, the inner wall of the end of the first connecting ring 2021 is connected to a first sealing rubber ring 2022, one side of the first sealing rubber ring 2022 is connected to a rubber protrusion 2023, the inner wall of the end of the second connecting ring 2011 is connected to a second sealing rubber ring 2012, and the second sealing rubber ring 2012 is provided with a groove adapted to fit the rubber protrusion 2023. Such a structural design can enhance the installation stability of the U-shaped tube 202, and the structure is simple and easy to operate.

[0030] Preferably, a U-shaped limit block 204 is clamped on the inner wall of the flue gas reheater cylinder 1 at a position corresponding to the protrusion of the U-shaped tube 202, and plug blocks are provided at both ends of the U-shaped limit block 204. The inner wall of the flue gas reheater cylinder 1 is provided with a slot adapted to fit the plug block. Such a structural design can further fix and install the U-shaped tube 202 to achieve the effect of rapid pre-installation, and the connection method is simple and easy to operate.

[0031] Preferably, the slider 403 is dovetail-shaped and has rounded edges and corners. Such a structural design can prevent the slider 403 from falling out of the slide groove 402 and make the slider 403 slide more smoothly.

[0032] Preferably, a matching third sealing rubber ring 4011 is connected to the end of the mounting tube 401, and the third sealing rubber ring 4011 is located on the outer wall of the connection between the fixed tube 3 and the cross tube 4. Such a structural design can enhance the connection sealing between the fixed tube 3 and the cross tube 4.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A heat exchange tube assembly for a flue gas reheater, comprising mounting baffles (101) connected to both sides of the inner wall of a flue gas reheater cylinder (1), wherein the mounting baffles (101) on both sides are respectively connected to an air inlet pipe (102) and an exhaust pipe (103), and a heat exchange tube (2) is connected between the mounting baffles (101) on both sides, characterized in that: The heat exchange tube (2) comprises a plurality of straight tubes (201), a U-shaped tube (202) is connected between the ends of two adjacent straight tubes (201), the outer walls at both ends of the U-shaped tube (202) are connected to a first connecting ring (2021), the outer walls at the ends of the straight tubes (201) are connected to a second connecting ring (2011), and a plurality of bolts (203) are connected between the first connecting ring (2021) and the second connecting ring (2011); The mounting partitions (101) on both sides are connected to fixed tubes (3), the outer wall of the fixed tubes (3) is connected to a connecting seat (301), the ends of the straight tubes (201) at both ends are connected to transverse tubes (4), the outer wall of the shaft body at the end of the transverse tube (4) is threadedly connected to a mounting tube (401), the outer wall of the mounting tube (401) is provided with a plurality of slide grooves (402), a plurality of sliders (403) are slidably connected in the slide grooves (402), a movable connecting ring (404) is connected between the ends of the plurality of sliders (403), the outer wall of the movable connecting ring (404) is fixedly connected to a driving tube (4041), the driving tube (4041) is rotatably connected to a cylinder (405), the inner wall of the cylinder (405) is threadedly connected to the outer wall of the connecting seat (301).

2. The heat exchange tube assembly for a flue gas reheater according to claim 1, characterized in that: The inner wall of the end of the first connecting ring (2021) is connected to a first sealing rubber ring (2022), one side of the first sealing rubber ring (2022) is connected to a rubber protrusion (2023), the inner wall of the end of the second connecting ring (2011) is connected to a second sealing rubber ring (2012), and the second sealing rubber ring (2012) is provided with a groove adapted to be inserted into the rubber protrusion (2023).

3. The heat exchange tube assembly for a flue gas reheater according to claim 2, characterized in that: The inner wall of the flue gas reheater cylinder (1) is clamped with a U-shaped limit block (204) at a position corresponding to the protrusion of the U-shaped tube (202), and plug blocks are provided at both ends of the U-shaped limit block (204). The inner wall of the flue gas reheater cylinder (1) is provided with a slot adapted to plug in the plug block.

4. The heat exchange tube assembly for a flue gas reheater according to claim 3, characterized in that: The slider (403) is arranged in a dovetail shape, and its edge corners are rounded.

5. The heat exchange tube assembly for a flue gas reheater according to claim 4, characterized in that: The end of the installation tube (401) is connected to a matching third sealing rubber ring (4011), and the third sealing rubber ring (4011) is located on the outer wall of the connection between the fixed tube (3) and the port of the horizontal tube (4).

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