A high temperature flue gas heat exchanger

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a high-temperature flue gas heat exchanger, comprising a shell, water pipes are connected at both ends of the shell, one end of the shell is open, and the other end of the shell is connected to a smoke outlet pipe, a serpentine pipe can be inserted into the smoke outlet pipe, a sealing mechanism is provided on the serpentine pipe, a smoke inlet pipe is connected to the serpentine pipe, a connecting plate is fixedly connected to the serpentine pipe, a supporting ring is fixedly connected to the shell, the supporting ring abuts against the connecting plate, and a squeezing mechanism is provided on the connecting plate. The utility model is convenient for disassembling the connecting plate, taking out the serpentine pipe, and opening the shell to clean the scale and perform internal maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a high-temperature flue gas heat exchanger. Background Art

[0002] During the emission process, high-temperature flue gas will contain a large amount of heat. In order to avoid heat waste, a heat exchange device is used to recover the heat. During the recovery, the heat of the high-temperature flue gas is recovered by water. At the same time, in order to ensure the contact area during recovery, the flue gas pipe will be set in a serpentine structure. After the recovery and heating, scale will be generated. The scale adheres to the serpentine pipe and affects the heat transfer. The serpentine pipe is generally installed inside the heat exchanger, which makes it inconvenient to disassemble it for cleaning and maintenance. Utility Model Content

[0003] The utility model aims to solve the disadvantage in the prior art that it is inconvenient to dismantle the serpentine tube for cleaning and maintenance, and proposes a high-temperature flue gas heat exchanger.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-temperature flue gas heat exchanger is designed, comprising a shell, both ends of the shell are connected with water pipes, one end of the shell is opened, and the other end of the shell is connected with a smoke outlet pipe, a serpentine pipe can be inserted into the smoke outlet pipe, the serpentine pipe is provided with a sealing mechanism, the serpentine pipe is connected with a smoke inlet pipe, a connecting plate is fixedly connected to the serpentine pipe, a supporting ring is fixedly connected to the shell, the supporting ring abuts against the connecting plate, and the connecting plate is provided with an extrusion mechanism.

[0006] Preferably, the sealing mechanism comprises a sealing ring, the sealing ring is fixedly connected to the serpentine tube, and a sealing ring is fixedly connected to the opposite inner surface of the sealing ring and the smoke outlet pipe.

[0007] Preferably, the extrusion mechanism comprises a rotating plate, the rotating plate is rotatably connected to the shell via a rotating shaft, a threaded rod is threadedly connected to the rotating plate, an abutment block is fixedly connected to the threaded rod, and the abutment block abuts against the connecting plate.

[0008] Preferably, the connecting plate is rotatably connected to a threaded sleeve via a bearing, a threaded column is internally threadedly connected to the threaded sleeve, a limiting seat is fixedly connected to the threaded column, and the limiting seat can be sleeved on the rotating plate.

[0009] Preferably, a knob is fixedly connected to the threaded column.

[0010] Preferably, the threaded column is coaxially arranged with the housing.

[0011] Preferably, the sealing ring is a graphite sealing ring.

[0012] The utility model provides a high-temperature flue gas heat exchanger, which has the beneficial effect of releasing the squeezing of the connecting plate by the squeezing mechanism so as to disassemble the connecting plate, take out the serpentine pipe, and open the shell so as to clean the scale and perform internal maintenance at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a high-temperature flue gas heat exchanger proposed by the utility model;

[0014] Figure 2 A cross-sectional view of a high-temperature flue gas heat exchanger proposed in the utility model Figure 1 ;

[0015] Figure 3 A cross-sectional view of a high-temperature flue gas heat exchanger proposed in the utility model Figure 2 ;

[0016] Figure 4 This is a structural schematic diagram of a high-temperature flue gas heat exchanger extrusion mechanism proposed by the utility model.

[0017] In the figure: shell 1, smoke inlet pipe 2, water pipe 3, connecting plate 4, rotating plate 5, abutment block 6, threaded rod 7, threaded sleeve 8, limit seat 9, smoke outlet pipe 10, serpentine pipe 11, threaded column 12, sealing ring 13, support ring 14. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Example 1

[0020] Reference Figure 1-4 A high-temperature flue gas heat exchanger includes a shell 1. Water pipes 3 are connected at both ends of the shell 1, one of the water pipes 3 is connected to the water inlet pipe, and the other water pipe 3 is connected to the water outlet pipe. One end of the shell 1 is open, and the other end of the shell 1 is connected to a smoke outlet pipe 10. A serpentine tube 11 can be inserted into the smoke outlet pipe 10, and a sealing mechanism is provided on the serpentine tube 11. A smoke inlet pipe 2 is connected to the serpentine tube 11, and a connecting plate 4 is fixedly connected to the serpentine tube 11. A sealing gasket is provided on the connecting plate 4. The sealing gasket is a silicone rubber sealing gasket with good elasticity so that it can recover after being squeezed.

[0021] A support ring 14 is fixedly connected to the shell 1, and the support ring 14 abuts against the connecting plate 4. A squeezing mechanism is provided on the connecting plate 4. The flue gas enters from the smoke inlet pipe 2 and is discharged from the smoke outlet pipe 10. The water in the shell 1 absorbs the heat of the flue gas. When there is scale on the outer wall of the serpentine tube 11 and the inner wall of the shell 1, it is necessary to clean them. First, the heat exchanger is disassembled, and then the squeezing mechanism on the connecting plate 4 is released to disassemble the connecting plate 4, take out the serpentine tube 11, and open the shell 1 to clean the scale and maintain the interior at the same time.

[0022] The sealing mechanism comprises a sealing ring 13 which is fixedly connected to the serpentine tube 11. The sealing ring 13 and the inner surface of the smoke outlet pipe 10 are fixedly connected with a sealing ring. Since the temperature of the smoke is relatively high, the sealing ring is a graphite sealing ring.

[0023] The extrusion mechanism includes a rotating plate 5, which is rotatably connected to the shell 1 through a rotating shaft. A threaded rod 7 is threadedly connected to the rotating plate 5, and a contact block 6 is fixedly connected to the threaded rod 7. The contact block 6 is in contact with the connecting plate 4. By rotating the threaded rod 7, the contact block 6 is brought into contact with the connecting plate 4, thereby applying pressure to the sealing plate 4 to fix the sealing plate 4.

[0024] Example 2

[0025] In Example 1, since the rotating plate 5 can rotate, the abutment block 6 will be offset when applying pressure to the fixed plate 5, and the sealing plate 4 will be unevenly stressed, which affects the sealing effect. Figure 1-4 As another preferred embodiment of the utility model, on the basis of embodiment 1, a threaded sleeve 8 is rotatably connected to the connecting plate 4 through a bearing, a threaded column 12 is internally threadedly connected to the threaded sleeve 8, the threaded column 12 is coaxially arranged with the housing 1, a limit seat 9 is fixedly connected to the threaded column 12, and the limit seat 9 can be sleeved on the rotating plate 5. By rotating the threaded sleeve 8, the threaded column 12 will be driven to move, so that the limit seat 9 is sleeved on the rotating plate 5, which plays a role of limiting the rotating plate 5, so that the abutment block 6 coincides with the axis of the housing 1, thereby ensuring that the pressure applied to the sealing plate 4 is uniform, which is beneficial to the sealing effect.

[0026] A knob is fixedly connected to the threaded column 12, and the design of the knob is adopted to drive the threaded rod 12 to rotate.

[0027] During disassembly, the threaded sleeve 8 is rotated to adjust the position of the threaded column 12 in the threaded sleeve 8 so that the limit seat 9 is disengaged from the limit on the rotating plate 5, and then the threaded rod 7 is loosened. Finally, the rotating plate 5 is rotated to make the rotating plate 5 offset from the connecting plate 4 and contact the limit on the connecting plate 4, and the connecting plate 4 can be taken out.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-temperature flue gas heat exchanger, comprising a shell (1), wherein both ends of the shell (1) are connected to each other with water pipes (3), characterized in that: One end of the shell (1) is open, and the other end of the shell (1) is connected to a smoke outlet pipe (10), a serpentine tube (11) can be inserted into the smoke outlet pipe (10), a sealing mechanism is provided on the serpentine tube (11), a smoke inlet pipe (2) is connected to the serpentine tube (11), a connecting plate (4) is fixedly connected to the serpentine tube (11), a support ring (14) is fixedly connected to the shell (1), the support ring (14) is in contact with the connecting plate (4), and a pressing mechanism is provided on the connecting plate (4); The extrusion mechanism comprises a rotating plate (5), the rotating plate (5) being rotatably connected to the housing (1) via a rotating shaft, a threaded rod (7) being threadedly penetrated through the rotating plate (5), a contact block (6) being fixedly connected to the threaded rod (7), and the contact block (6) being in contact with the connecting plate (4).

2. A high-temperature flue gas heat exchanger according to claim 1, characterized in that: The sealing mechanism comprises a sealing ring (13), the sealing ring (13) being fixedly connected to the serpentine tube (11), and a sealing ring being fixedly connected to the inner surface opposite to the smoke outlet tube (10).

3. The high-temperature flue gas heat exchanger according to claim 1, characterized in that: The connection plate (4) is rotatably connected to a threaded sleeve (8) via a bearing, the threaded sleeve (8) is internally threadedly connected to a threaded column (12), the threaded column (12) is fixedly connected to a limit seat (9), and the limit seat (9) can be sleeved on the rotating plate (5).

4. A high-temperature flue gas heat exchanger according to claim 3, characterized in that: A knob is fixedly connected to the threaded column (12).

5. The high-temperature flue gas heat exchanger according to claim 3, characterized in that: The threaded column (12) is arranged coaxially with the housing (1).

6. A high-temperature flue gas heat exchanger according to claim 2, characterized in that: The sealing ring is a graphite sealing ring.

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