Anti-abrasion device for flue gas pipeline

Abstract

The utility model discloses an anti-abrasion device for a flue gas pipeline, which belongs to the technical field of heat exchange pipe abrasion prevention and comprises an anti-abrasion pipe arranged perpendicular to the flue gas flow direction, mounting plates at two ends, a rotating shaft, a flange connected with a flue gas pipeline wall plate and a manual rotating hand wheel. By rotating the hand wheel, the smoke scouring surface of the anti-abrasion pipe can be adjusted, and the service life is prolonged. The device further comprises a sealing box and flexible graphite woven packing, and smoke sealing is achieved. A plurality of rows of anti-abrasion pipes can be arranged according to flue gas conditions, and the pipe bodies are reinforced by the anti-abrasion supports. Through the arrangement of the rotating hand wheel, the anti-abrasion pipe can be manually rotated to change the smoke scouring surface, so that the abrasion of the anti-abrasion pipe is more uniform, and the service life of the anti-abrasion pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange tube anti-wear, in particular to an anti-wear device for a flue gas pipeline. Background Art

[0002] In the industrial production of low-temperature economizers in coal-fired power plants, the dust content in flue gas is relatively high, usually ranging from 10 to 50 g / Nm 3 To effectively remove this dust, the flue gas flow rate within the heat exchanger is generally designed to be 10-15 m / s. However, high dust content and high flow rate cause severe erosion and wear on the heat exchange tubes in the flue gas duct, directly affecting the service life and operational safety of the equipment.

[0003] Therefore, most companies that currently design economizers use fixed anti-wear steel pipes and anti-wear angle steels as anti-wear devices before the flue gas contacts the heat exchange tubes. Although this solution can reduce the wear of the flue gas on the heat exchange tubes to a certain extent, it has some obvious drawbacks. Fixed anti-wear pipes are not easy to replace. When the fixed anti-wear pipes are subjected to flue gas scouring for a long time, the flue gas scouring surface wears out, which will change the flue gas flow field and increase the flue gas resistance. This not only reduces the heat exchange efficiency of the heat exchange tubes installed behind them, but may also pose a threat to the safe operation of the equipment. Secondly, in order to extend the service life of the fixed anti-wear pipes, the number of anti-wear pipes and anti-wear angle steels needs to be increased, which undoubtedly increases material and manufacturing costs. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an anti-wear device for a flue gas duct. By rotating the hand wheel and cooperating with the mounting plate, after one side of the anti-wear pipe is worn, the side affected by the flue gas scouring can be changed by rotating the hand wheel, thereby extending the service life of the anti-wear pipe, reducing the replacement frequency, reducing labor costs, and improving the operating efficiency and safety of the equipment.

[0005] To achieve the above-mentioned purpose, the present invention provides an anti-wear device for a flue gas duct, comprising:

[0006] The anti-wear pipe is installed in the flue gas duct with its axis perpendicular to the flue gas flow direction;

[0007] Two mounting plates are connected to both ends of the anti-wear tube and are used to mount the anti-wear tube, and a rotating shaft is fixed at the center of a side of each mounting plate away from the anti-wear tube;

[0008] Two flanges, each flange is sleeved on one of the rotating shafts, and both flanges are connected to the wall plate of the flue gas duct; and

[0009] A rotating hand wheel is connected to the end of one of the rotating shafts and is used to drive the rotating shaft and the anti-wear pipe to rotate so as to adjust the surface of the anti-wear pipe that is eroded by the flue gas.

[0010] Furthermore, one end of the rotating handwheel is a handle and the other end is a worm, and an end of one of the rotating shafts is provided with a worm wheel adapted to the worm, and the worm and the worm wheel cooperate so that the rotating handwheel limits the rotation direction of the rotating shaft.

[0011] Furthermore, the anti-wear device further comprises:

[0012] A sealing box is installed at the connection between the flange and the rotating shaft to achieve smoke sealing.

[0013] Furthermore, the sealing box is filled with a flexible graphite braided filler, and the flexible graphite braided filler is in contact with the rotating shaft to achieve smoke sealing.

[0014] Furthermore, the two flanges are connected to the wall plate of the flue gas duct by bolts to facilitate the removal and replacement of the anti-wear device.

[0015] Furthermore, the anti-wear pipes are arranged in one or more rows according to the flow rate and dust content of the flue gas.

[0016] Furthermore, the anti-wear device further comprises:

[0017] The anti-wear bracket is sleeved on the anti-wear pipe to reinforce the anti-wear pipe.

[0018] Furthermore, the anti-wear bracket can be set to one or more according to the flow rate and dust content of the flue gas.

[0019] Furthermore, the anti-wear pipe is fixed to the mounting plate by welding.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) By rotating the hand wheel to adjust the surface of the anti-wear pipe that is eroded by the flue gas, both the front and back sides of the anti-wear pipe can be evenly eroded by the flue gas, which extends the service life of the anti-wear pipe, reduces the replacement frequency, and thus reduces maintenance costs and time.

[0022] (2) The anti-wear device of the present invention is connected to the flue gas duct wall plate through a flange with bolts, which facilitates the rapid disassembly and replacement of the anti-wear device and saves a lot of labor costs.

[0023] (3) The anti-wear device of the present invention can be provided with different numbers of anti-wear pipes and anti-wear brackets according to the flow rate and dust content of the flue gas to adapt to different working conditions.

[0024] (4) The utility model adopts a sealing box and a flexible graphite braided packing to achieve flue gas sealing, which not only ensures the relative rotation between the anti-wear pipe and the flue wall plate, but also ensures that the flue gas will not leak.

[0025] In summary, the utility model has the technical characteristics of easy replacement, no need for external continuous power, simple structure, long service life, flexible layout, etc., and is particularly suitable for wear prevention of equipment with high dust content in flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an anti-wear device for a flue gas duct provided by an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the flue gas scouring surface of the anti-wear pipe of the anti-wear device for the flue gas duct provided by an embodiment of the present utility model before rotation;

[0028] Figure 3 This is a schematic diagram of the smoke scouring surface of the anti-wear pipe of the anti-wear device for the smoke duct provided by an embodiment of the utility model after rotation;

[0029] Figure 4 This is a schematic structural diagram of a rotating hand wheel in an anti-wear device for a flue gas duct provided by an embodiment of the utility model;

[0030] Explanation of the numbers: 1. Anti-wear tube; 2. Mounting plate; 21. Rotating shaft; 211. Worm gear; 3. Flange; 4. Rotating handwheel; 41. Handle; 42. Worm; 5. Sealing box; 6. Anti-wear bracket; 7. Wall panel. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] like Figure 1 As shown, this embodiment provides an anti-wear device for a flue gas duct, comprising:

[0035] The anti-wear pipe 1 is installed in the flue gas duct, with its axis arranged perpendicular to the flue gas flow direction;

[0036] Two mounting plates 2 are connected to both ends of the anti-wear tube 1 for mounting the anti-wear tube 1, and a rotating shaft 21 is fixed at the center of one side of each mounting plate 2 away from the anti-wear tube 1;

[0037] Two flanges 3, each flange 3 is sleeved on a corresponding rotating shaft 21, and both flanges 3 are connected to the wall plate 7 of the flue gas duct; and,

[0038] The rotating hand wheel 4 is connected to the end of a rotating shaft and is used to drive the rotating shaft and the anti-wear pipe 1 to rotate so as to adjust the flue gas flushing surface of the anti-wear pipe 1 .

[0039] This embodiment solves the problem that too few fixed anti-wear pipes 1 are prone to wear and tear, affecting the flue gas flow and making replacement difficult, and too many fixed anti-wear pipes increase costs and flue gas resistance. The rotatable anti-wear pipes 1 extend the service life of the anti-wear pipes 1 and reduce the frequency of replacement.

[0040] Specifically, if Figure 4 As shown, one end of the rotating handwheel 4 is a handle 41, and the other end is a worm 42. A worm gear 211 adapted to the worm 42 is provided at the end of one rotating shaft 21. The worm 42 drives the worm gear 211, so that the rotating handwheel 4 limits the rotation direction of the rotating shaft 21. The use of the worm 42 and the worm gear 211 for transmission ensures that the device has a self-locking function, that is, the rotating shaft 21 can only be rotated by rotating the handle 41 to rotate to adjust the anti-wear tube 1, and the anti-wear tube 1 cannot rotate on its own when the rotating handle 41 is stationary.

[0041] Preferably, the anti-wear device further comprises a sealing box 5 installed at the connection between the flange 3 and the rotating shaft 21 for achieving smoke sealing.

[0042] Preferably, the sealing box 5 is filled with a flexible graphite braided packing, which is in contact with the rotating shaft 21 to achieve smoke sealing.

[0043] Furthermore, both flanges 3 are connected to the wall plate 7 of the flue gas duct by bolts, so as to facilitate the removal and replacement of the anti-wear device.

[0044] Preferably, the number of rows of the anti-wear pipes 1 can be flexibly set according to the flow rate and dust content of the flue gas to improve the adaptability and effectiveness of the anti-wear device.

[0045] Preferably, the anti-wear device further comprises an anti-wear bracket 6, which is sleeved on the anti-wear pipe 1 to reinforce the anti-wear pipe 1. The provision of the anti-wear bracket 6 enhances the structural stability of the anti-wear pipe 1 and extends the service life of the entire anti-wear device.

[0046] Furthermore, the number of the anti-wear bracket 6 can be one or more according to the flow rate and dust content of the flue gas.

[0047] Preferably, the anti-wear pipe 1 is fixed to the mounting plate 2 by welding.

[0048] During use, the number of rows of anti-wear tubes 1 is adjusted based on the actual flue gas flow rate and dust content, and one or more anti-wear brackets 6 are installed to reinforce the anti-wear tubes 1. The anti-wear tubes 1 are then placed in the flue gas duct, ensuring that they are perpendicular to the flue gas flow direction to effectively withstand flue gas erosion. The ends of the anti-wear tubes 1 are connected to two mounting plates 2, respectively, and a rotating shaft 21 is fixed at the center of each mounting plate 2.

[0049] Slide the two flanges 3 onto the rotating shaft 21 and bolt them to the wall plate 7 of the flue gas duct, ensuring that the anti-wear device is firmly fixed in place. Then confirm that the sealing box 5 is correctly installed at the connection between the flange 3 and the rotating shaft 21, and check whether the sealing box 5 is filled with flexible graphite braided packing to achieve flue gas sealing.

[0050] like Figure 2 and Figure 3 As shown, when the flue gas scouring surface of the anti-wear tube 1 needs to be changed, the rotating handwheel 4 connected to the end of the rotating shaft 21 is manually turned, and the worm 42 at one end of the rotating handwheel 4 drives the worm gear 211 to realize the rotation of the rotating shaft 21, thereby driving the anti-wear tube 1 to rotate to change the flue gas scouring surface, so that the flue gas scouring surface A is away from the flue gas, and the un-scoured surface B is adjusted to a position to face the flue gas.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-wear device for a flue gas duct, installed in the flue gas duct, used to withstand flue gas scouring before the flue gas contacts the heat exchange tube, characterized in that: include: The anti-wear pipe is installed in the flue gas duct with its axis perpendicular to the flue gas flow direction; Two mounting plates are connected to both ends of the anti-wear tube and are used to mount the anti-wear tube, and a rotating shaft is fixed at the center of a side of each mounting plate away from the anti-wear tube; Two flanges, each flange is sleeved on one of the rotating shafts, and both flanges are connected to the wall plate of the flue gas duct; and A rotating hand wheel is connected to the end of one of the rotating shafts and is used to drive the rotating shaft and the anti-wear pipe to rotate so as to adjust the flue gas flushing surface of the anti-wear pipe.

2. The anti-wear device for flue gas duct according to claim 1, characterized in that: One end of the rotating handwheel is a handle, and the other end is a worm, and an end of one of the rotating shafts is provided with a worm wheel adapted to the worm, and the worm drives the worm wheel so that the rotating handwheel limits the rotation direction of the rotating shaft.

3. The anti-wear device for flue gas duct according to claim 1, characterized in that: The anti-wear device also includes: A sealing box is installed at the connection between the flange and the rotating shaft to achieve smoke sealing.

4. The anti-wear device for flue gas duct according to claim 3, characterized in that: The sealing box is filled with a flexible graphite braided filler, and the flexible graphite braided filler is in contact with the rotating shaft to achieve smoke sealing.

5. The anti-wear device for flue gas duct according to claim 1, characterized in that: The two flanges are connected to the wall plate of the flue gas duct by bolts to facilitate the removal and replacement of the anti-wear device.

6. The anti-wear device for flue gas duct according to claim 1, characterized in that: The anti-wear pipes are arranged in one or more rows according to the flow rate and dust content of the flue gas.

7. The anti-wear device for a flue gas duct according to claim 1, characterized in that: Also includes: The anti-wear bracket is sleeved on the anti-wear pipe to reinforce the anti-wear pipe.

8. The anti-wear device for a flue gas duct according to claim 7, characterized in that: The anti-wear bracket is provided in plurality according to the flow rate and dust content of the flue gas.

9. The anti-wear device for a flue gas duct according to claim 1, characterized in that: The anti-wear pipe is fixed to the mounting plate by welding.

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