Tubular air preheater

Abstract

The utility model discloses a tubular air preheater which comprises a tube body, a preheating mechanism, a cleaning mechanism and an air exchange mechanism. Heat exchange pipes are evenly distributed on the inner arc face of the pipe body, a top sealing cover is arranged on the upper surface of the pipe body, liquid inlet pipes and liquid outlet pipes of the heat exchange pipes are externally connected with external circulation equipment, and the right end of the inner arc face of the pipe body is designed in a layered mode. The preheating mechanism comprises a rotating rod, a top space division plate, a hollowed-out frame, a hollowed-out plate and a top sealing plate, the rotating rod is rotationally connected to the middle of the upper surface of the top sealing cover, the top space division plate is arranged on the upper side of the outer arc surface of the rotating rod, and the top sealing plate is arranged on the upper surface of the top space division plate; the lower end of the rotating rod is fixedly connected with a hollowed-out plate through a hollowed-out frame. The cleaning mechanism is arranged in the pipe body, and the preheating mechanism is fixedly connected with the cleaning mechanism; the air exchange mechanism is arranged on the outer side face of the pipe body, and the pipe type air preheater prevents excessive dust accumulation from affecting operation of the preheater.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to a tubular air preheater. Background Art

[0002] Tubular air preheater refers to an air preheater in which flue gas and air flow inside and outside the tube respectively, and heat exchange is carried out through the tube wall. Tubular air preheater is widely used due to its simple structure, easy installation, no wearing parts and low failure rate.

[0003] In the prior art, common air preheaters are separated from flue gas and air. During heat exchange, the heat inside the flue gas is often absorbed, and then passed to fresh air through the heat exchange pipe, and then the heat is circulated to the device.

[0004] There are some problems in the use of this type of preheater. The soot and dirt in the flue gas will adhere to the inner wall of the heat exchange tube and the inner wall of the heat exchange chamber, affecting the subsequent preheating operation. For this reason, we propose a tubular air preheater. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a tubular air preheater which can automatically clean the smoke stains and dust inside, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tubular air preheater, comprising a tube body, a preheating mechanism, a cleaning mechanism and a ventilation mechanism;

[0007] Tube body: Its inner arc surface is provided with evenly distributed heat exchange tubes, and the upper surface of the tube body is provided with a top sealing cover. The liquid inlet and outlet pipes of the heat exchange tubes are respectively connected to the external circulation equipment. The right end of the inner arc surface of the tube body is a layered design;

[0008] Preheating mechanism: It includes a rotating rod, a top space dividing plate, a hollow frame, a hollow plate and a top sealing plate. The rotating rod is rotatably connected to the middle part of the upper surface of the top sealing cover. The upper side of the outer arc surface of the rotating rod is provided with a top space dividing plate. The upper surface of the top space dividing plate is provided with a top sealing plate. The lower end of the rotating rod is fixedly connected with the hollow plate through the hollow frame.

[0009] Cleaning mechanism: it is arranged inside the pipe body, and the preheating mechanism is fixedly connected to the cleaning mechanism;

[0010] Ventilation mechanism: It is arranged on the outer side of the pipe body to prevent excessive dust accumulation from affecting the operation of the preheater.

[0011] Furthermore, it also includes a control switch, which is arranged at the upper end of the top sealing cover, and the input end of the control switch is electrically connected to an external power supply to regulate the operation of the motor.

[0012] Furthermore, it also includes a reduction motor, which is arranged on the upper surface of the top sealing cover, the output shaft of the reduction motor is fixedly connected to the upper end of the rotating rod, and the input end of the reduction motor is electrically connected to the output end of the control switch to provide power for preheating.

[0013] Furthermore, the cleaning mechanism includes a top brush mounting plate, a rotating bearing and a bottom brush mounting plate, the top brush mounting plate is fixedly connected to the upper side of the inner arc surface of the tube body, the top brush mounting plate is located between the top space dividing plate and the heat exchange tube, a rotating bearing is provided in the middle of the dividing plate, the inner arc surface of the rotating bearing is fixedly connected to the outer arc surface of the rotating rod, the upper end of the hollow frame is provided with evenly distributed bottom brush mounting plates, the bottom end of the tube body is provided with a hopper, and the bottom end of the hopper is provided with a storage box to realize the cleaning function.

[0014] Furthermore, the ventilation mechanism includes a smoke inlet pipe, a smoke outlet pipe, an air inlet pipe and an air outlet pipe. The smoke inlet pipe is located at the left end of the tube body, the smoke outlet pipe is provided at the right end of the tube body, the air inlet pipe is provided at the front end of the tube body, and the air outlet pipe is provided at the rear end of the tube body, thereby realizing the function of connecting to external instruments.

[0015] Furthermore, it also includes a box door, which is hinged to the bottom front end of the storage box through a hinge, and can be opened from here for cleaning after the storage box is full.

[0016] Furthermore, it also includes mounting feet, which are respectively arranged on the bottom surface of the tube body to achieve the function of installing the preheater.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] During the use of the preheater, the brushes can be installed in sequence on the upper surface of the top brush mounting plate and the upper surface of the bottom brush mounting plate. At this time, the upper brush extends into the lower side of the outer surface of the top space dividing plate. A large amount of dust is generated after the flue gas is cooled. While the top space dividing plate rotates, the dust inside it is continuously brushed by the upper brush. The lower brush brushes off the dust on the heat exchange tube. Then the dust moves downward and falls into the interior of the storage box under the guidance of the hollow frame and the hopper, completing the dust collection and preventing excessive dust accumulation from affecting the operation of the preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the tube body of the utility model.

[0021] In the figure: 1 tube body, 2 preheating mechanism, 21 rotating rod, 22 top space dividing plate, 23 hollow frame, 24 hollow plate, 25 top sealing plate, 3 cleaning mechanism, 31 top brush mounting plate, 32 rotating bearing, 33 bottom brush mounting plate, 4 heat exchange tube, 5 ventilation mechanism, 51 smoke inlet pipe, 52 smoke outlet pipe, 53 air inlet pipe, 54 air outlet pipe, 6 top sealing cover, 7 reduction motor, 8 hopper, 9 storage box, 10 mounting feet, 11 box door, 12 control switch. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-2 , this embodiment provides a technical solution: a tubular air preheater, comprising a tube body 1, a preheating mechanism 2, a cleaning mechanism 3 and a ventilation mechanism 5;

[0024] Tube body 1: The inner arc surface thereof is provided with evenly distributed heat exchange tubes 4, the upper surface of the tube body 1 is provided with a top sealing cover 6, the liquid inlet pipe and the liquid outlet pipe of the heat exchange tube 4 are respectively connected to the external circulation equipment, the right end of the inner arc surface of the tube body 1 is a layered design, and also includes a control switch 12, the control switch 12 is arranged at the upper end of the top sealing cover 6, the input end of the control switch 12 is electrically connected to the external power supply, and also includes mounting legs 10, the mounting legs 10 are respectively arranged on the bottom surface of the tube body 1, and the preheater is installed on the designated station through the threaded openings on the mounting legs 10;

[0025] Preheating mechanism 2: It includes a rotating rod 21, a top space dividing plate 22, a hollow frame 23, a hollow plate 24 and a top sealing plate 25. The rotating rod 21 is rotatably connected to the middle part of the upper surface of the top sealing cover 6. The upper side of the outer arc surface of the rotating rod 21 is provided with a top space dividing plate 22. The upper surface of the top space dividing plate 22 is provided with a top sealing plate 25. The lower end of the rotating rod 21 is fixedly connected to the hollow plate 24 through the hollow frame 23. It also includes a reduction motor 7. The reduction motor 7 is arranged on the upper surface of the top sealing cover 6. The output shaft of the reduction motor 7 is fixedly connected to the upper end of the rotating rod 21. The input end of the reduction motor 7 is electrically connected to the output end of the control switch 12. At this time, the preheater can be used. At this time, the control switch 12 is adjusted, the reduction motor 7 is operated, and the output shaft of the reduction motor 7 is rotated, thereby driving the rotating rod 21 to rotate, thereby driving the top space dividing plate 22 and the hollow plate 24 to rotate;

[0026] Cleaning mechanism 3: It is arranged inside the tube body 1, the preheating mechanism 2 is fixedly connected to the cleaning mechanism 3, and the cleaning mechanism 3 includes a top brush mounting plate 31, a rotating bearing 32 and a bottom brush mounting plate 33. The top brush mounting plate 31 is fixedly connected to the upper side of the inner arc surface of the tube body 1, and the top brush mounting plate 31 is located between the top space dividing plate 22 and the heat exchange tube 4. A rotating bearing 32 is provided in the middle of the dividing plate 22, and the inner arc surface of the rotating bearing 32 is fixedly connected to the outer arc surface of the rotating rod 21. The upper end of the hollow frame 23 is provided with evenly distributed bottom brush mounting plates 33, and the bottom end of the tube body 1 is provided with a hopper 8, and the bottom end of the hopper 8 is provided with a storage box 9, further comprising a box door 11, the box door 11 is hinged to the bottom front end of the storage box 9 by a hinge, at which time the brushes can be sequentially installed on the upper surface of the top brush mounting plate 31 and the upper surface of the bottom brush mounting plate 33, at which time the upper brush extends into the lower side of the outer surface of the top space dividing plate 22, during which a large amount of dust is generated after the flue gas is cooled, and while the top space dividing plate 22 rotates, the dust inside it is continuously brushed by the upper brush, and the lower brush brushes off the dust on the heat exchange tube 4, and then the dust moves downward and falls into the interior of the storage box 9 under the guidance of the hollow frame 23 and the hopper 8, completing the dust collection;

[0027] Ventilation mechanism 5: It is arranged on the outer side of the tube body 1. The ventilation mechanism 5 includes a smoke inlet pipe 51, a smoke outlet pipe 52, an air inlet pipe 53 and an air outlet pipe 54. The smoke inlet pipe 51 is located at the left end of the tube body 1, and the smoke outlet pipe 52 is arranged at the right end of the tube body 1. The front end of the tube body 1 is provided with an air inlet pipe 53, and the rear end of the tube body 1 is provided with an air outlet pipe 54. At this time, the ends of the smoke inlet pipe 51, the smoke outlet pipe 52, the air inlet pipe 53 and the air outlet pipe 54 can be connected to external devices in sequence. At this time, the smoke of the external device enters the interior of the tube body 1 through the smoke inlet pipe 51 , regulate the external circulation equipment, and the heat exchange tube 4 runs. At this time, the heat exchange tube 4 absorbs the heat in the flue gas, and the heat flows to the front side along the heat exchange tube 4. At this time, the cold flue gas moves to the right through the top space dividing plate 22, and is then discharged to the outside of the tube body 1 along the smoke outlet pipe 52. At this time, the external gas passes through the inside of the tube body 1 through the air inlet pipe 53, and then is affected by the air pressure, and the gas runs downward. When the gas is received by the front side of the heat exchange tube 4, the heat exchange tube 4 transfers the heat to the gas, and then the heated gas is discharged along the air outlet pipe 54.

[0028] The working principle of a tubular air preheater provided by the utility model is as follows: the preheater is installed on a designated work station through the threaded opening on the mounting foot 10, and the brushes can be installed on the upper surface of the top brush mounting plate 31 and the upper surface of the bottom brush mounting plate 33 in sequence. At this time, the upper brush extends into the lower side of the outer surface of the top space dividing plate 22, and the ends of the smoke inlet pipe 51, the smoke outlet pipe 52, the air inlet pipe 53 and the air outlet pipe 54 can be connected to external devices in sequence. At this time, the preheater can be used, and the control switch 12 is adjusted, the reduction motor 7 is operated, and the output shaft of the reduction motor 7 is rotated, thereby driving the rotating rod 21 to rotate, and then driving the top space dividing plate 22 and the hollow plate 24 to rotate. At this time, the smoke from the external device enters the interior of the tube body 1 through the smoke inlet pipe 51, and the external circulation is adjusted Equipment, the heat exchange tube 4 is running, at this time the heat exchange tube 4 absorbs the heat in the flue gas, and the heat flows to the front side along with the heat exchange tube 4. At this time, the cold flue gas moves to the right through the top space dividing plate 22, and then is discharged to the outside of the tube body 1 along the smoke outlet pipe 52. At this time, the external gas passes through the inside of the tube body 1 through the air inlet pipe 53, and then is affected by the air pressure, and the gas moves downward. When the gas is received by the front side of the heat exchange tube 4, the heat exchange tube 4 transfers the heat to the gas, and then the heated gas is discharged along the air outlet pipe 54. During this period, a large amount of dust is generated after the flue gas is cooled. While the top space dividing plate 22 rotates, the dust inside it is continuously brushed by the brush on the upper side, and the brush on the lower side brushes off the dust on the heat exchange tube 4. Then the dust moves downward and falls into the inside of the storage box 9 under the guidance of the hollow frame 23 and the hopper 8, completing the dust collection.

[0029] It is worth noting that the heat exchange tube 4 and the reduction motor 7 disclosed in the above embodiments can be freely configured according to the actual application scenario. It is recommended to use conventional stainless steel heat exchanger tubes for the heat exchange tube 4, and it is recommended to use RV063-20-YS-0.75KWNRMV reducer YS three-phase asynchronous AC motor for the reduction motor 7. A control button 12 is provided on the control switch corresponding to the reduction motor 7 and used to control its switch.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tubular air preheater, characterized in that: It comprises a tube body (1), a preheating mechanism (2), a cleaning mechanism (3) and a ventilation mechanism (5); Tube body (1): The inner arc surface thereof is provided with evenly distributed heat exchange tubes (4); the upper surface of the tube body (1) is provided with a top sealing cover (6); the liquid inlet pipe and the liquid outlet pipe of the heat exchange tube (4) are respectively connected to external circulation equipment; the right end of the inner arc surface of the tube body (1) is a layered design; The preheating mechanism (2) comprises a rotating rod (21), a top space dividing plate (22), a hollow frame (23), a hollow plate (24) and a top sealing plate (25), wherein the rotating rod (21) is rotatably connected to the middle portion of the upper surface of the top sealing cover (6), a top space dividing plate (22) is provided on the upper side of the outer arc surface of the rotating rod (21), a top sealing plate (25) is provided on the upper surface of the top space dividing plate (22), and the lower end of the rotating rod (21) is fixedly connected to the hollow plate (24) via the hollow frame (23); A cleaning mechanism (3) is arranged inside the tube body (1), and the preheating mechanism (2) is fixedly connected to the cleaning mechanism (3); Ventilation mechanism (5): It is arranged on the outer side surface of the tube body (1).

2. A tubular air preheater according to claim 1, characterized in that: It also includes a control switch (12), which is arranged at the upper end of the top sealing cover (6), and the input end of the control switch (12) is electrically connected to an external power supply.

3. A tubular air preheater according to claim 2, characterized in that: It also includes a reduction motor (7), which is arranged on the upper surface of the top sealing cover (6), the output shaft of the reduction motor (7) is fixedly connected to the upper end of the rotating rod (21), and the input end of the reduction motor (7) is electrically connected to the output end of the control switch (12).

4. A tubular air preheater according to claim 1, characterized in that: The cleaning mechanism (3) comprises a top brush mounting plate (31), a rotating bearing (32) and a bottom brush mounting plate (33); the top brush mounting plate (31) is fixedly connected to the upper side of the inner arc surface of the tube body (1); the top brush mounting plate (31) is located between the top space dividing plate (22) and the heat exchange tube (4); a rotating bearing (32) is provided in the middle of the dividing plate (22); the inner arc surface of the rotating bearing (32) is fixedly connected to the outer arc surface of the rotating rod (21); the upper end of the hollow frame (23) is provided with evenly distributed bottom brush mounting plates (33); the bottom end of the tube body (1) is provided with a hopper (8); the bottom end of the hopper (8) is provided with a storage box (9).

5. The tubular air preheater according to claim 1, characterized in that: The ventilation mechanism (5) comprises a smoke inlet pipe (51), a smoke outlet pipe (52), an air inlet pipe (53) and an air outlet pipe (54); the smoke inlet pipe (51) is located at the left end of the tube body (1); the smoke outlet pipe (52) is provided at the right end of the tube body (1); the air inlet pipe (53) is provided at the front end of the tube body (1); and the air outlet pipe (54) is provided at the rear end of the tube body (1).

6. A tubular air preheater according to claim 1, characterized in that: It also comprises a box door (11), and the box door (11) is hinged to the bottom front end of the storage box (9) through a hinge.

7. The tubular air preheater according to claim 1, characterized in that: It also comprises mounting feet (10), wherein the mounting feet (10) are respectively arranged on the bottom surface of the tube body (1).

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