Water-cooled rapping device

Abstract

The utility model relates to a water-cooled rapping device, which belongs to the technical field of heat exchange and comprises an in-furnace rapping rod fixedly arranged on a tube body of a heat exchange tube bundle and a through-wall rapping rod penetrating through a furnace wall and fixedly connected with the in-furnace rapping rod. The through-wall rapping rod comprises a first upper round pipe and a first lower round pipe, the in-furnace rapping rod comprises a second upper round pipe and a second lower round pipe, the first upper round pipe penetrates through a furnace wall to be communicated with the second upper round pipe, and the first lower round pipe penetrates through the furnace wall to be communicated with the second lower round pipe; the ends, away from the through-wall rapping rod connected with the second upper round pipe and the second lower round pipe, of the second upper round pipe are communicated with each other, a water inlet is formed in the end, located outside the furnace wall, of the first lower round pipe, and a water outlet is formed in the end, located outside the furnace wall, of the first upper round pipe. Cooling water is introduced into the vibrating rod in the furnace through the water inlet, and the cooling water is led out from the water outlet outside the furnace wall after being heated, so that the temperature of the pipe wall of the vibrating rod in the furnace is reduced, the corrosion influence of high-temperature flue gas on the vibrating rod is reduced or avoided, and the service life of the vibrating rod is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange and relates to a water-cooled rapping device. Background Art

[0002] For tubular heat exchange equipment that processes flue gas containing adhesive components, such as boilers and heat exchangers, the adhesive dust in the flue gas will adhere to the surface of the tube / tube bundle, which may reduce the heat recovery rate at the least and cause equipment blockage at the worst, affecting the normal operation of the equipment.

[0003] To solve the dust accumulation problem of tubes or tube bundles, a dust cleaning device is needed, and a dust cleaning rapper (including elastic rapper) is one of the most effective dust cleaning devices. The dust cleaning rapper exerts a rapping force on the dust-accumulated tube / tube bundle by knocking the rapping rod connected to the dust-accumulated tube / tube bundle, so that the dust attached to the outer surface of the tube / tube bundle is loosened and falls off, thereby removing the dust on the tube / tube bundle and keeping the outer surface of the tube / tube bundle clean.

[0004] The rapping rod will be corroded by flue gas for a long time when working in a high temperature environment, especially when facing flue gas with corrosive components, the service life of the rapping rod will be shortened, and can be shortened to only about half a year. After the rapping rod is damaged, due to its special structure with the heat exchange equipment, it cannot be replaced alone, and must be replaced at the same time as the equipment. That is, no matter whether the equipment is damaged or not, as long as the rapping rod is damaged, the entire equipment will be replaced, which not only affects the production of the equipment, but also increases the production cost.

[0005] Therefore, how to design a rapping rod with long service life and stability is a problem that needs to be solved urgently. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a water-cooled rapping device to reduce the impact of high-temperature flue gas on the rapping rod and improve the service life and working stability of the rapping rod.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a water-cooled rapping device for removing dust accumulated on the surface of a heat exchange tube bundle, comprising an in-furnace rapping rod located in a furnace wall, and a through-wall rapping rod passing through the furnace wall and fixedly connected to the in-furnace rapping rod. The through-wall rapping rod comprises a first upper circular tube and a first lower circular tube arranged at intervals in the vertical direction, the in-furnace rapping rod comprises a second upper circular tube and a second lower circular tube fixedly arranged on the tube body of the heat exchange tube bundle, the first upper circular tube passes through the furnace wall and is connected to the second upper circular tube, and the first lower circular tube passes through the furnace wall and is connected to the second lower circular tube.

[0008] Optionally, the second upper circular tube is connected to the second lower circular tube at one end away from the through-wall rapping rod connected thereto, a water inlet is provided at one end of the first lower circular tube located outside the furnace wall, and a water outlet is provided at the end of the first upper circular tube located outside the furnace wall.

[0009] Optionally, the second upper circular tube and the second lower circular tube are connected to each other via a customized elbow at one end away from the through-wall rapping rod connected thereto.

[0010] Optionally, a striking rod head is fixedly provided at one end of the first upper circular tube and the first lower circular tube located outside the furnace wall, and the projections of the first upper circular tube and the first lower circular tube are both located within the range of the striking rod head.

[0011] Optionally, the parts of the first upper circular tube and the first lower circular tube located inside the furnace wall are fixedly connected by a first prefabricated rib plate.

[0012] Optionally, the second upper circular tube and the second lower circular tube are fixedly connected via a second prefabricated rib plate.

[0013] Optionally, a mounting rib is provided at a connection between the first upper circular tube and the second upper circular tube and at a connection between the first lower circular tube and the second lower circular tube.

[0014] Optionally, a sealing mechanism is provided between the through-wall rapping rod and the furnace wall.

[0015] Optionally, the first upper circular tube and the second upper circular tube are connected by welding, and the first lower circular tube and the second lower circular tube are connected by welding.

[0016] Optionally, metal hoses are provided in both the water inlet and the water outlet.

[0017] Optionally, the rapping device includes at least one set of in-furnace rapping rods and through-wall rapping rods.

[0018] The beneficial effects of the utility model are:

[0019] The water-cooled rapping device provided by the utility model passes cooling water into the furnace rapping rod inside the furnace wall through a water inlet arranged outside the furnace wall, and uses the pressure and density difference of water as a motive force, so that the cooling water is heated in the furnace rapping rod and then flows to the through-wall rapping rod, and finally is led out from the water outlet outside the furnace wall to take away the heat inside the tube of the furnace rapping rod, reduce the tube wall temperature of the furnace rapping rod, reduce or avoid the corrosion effect of high-temperature flue gas on the rapping rod, and extend the service life of the rapping rod.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A schematic diagram of the structure of the water-cooled rapping device provided by the utility model;

[0023] Figure 2 A schematic diagram of the structure of a wall-penetrating rapping rod of a water-cooled rapping device provided by the utility model;

[0024] Figure 3 A schematic diagram of the structure of the in-furnace rapping rod of the water-cooled rapping device provided by the utility model;

[0025] Figure 4 A cross-sectional view of the first prefabricated rib plate of the water-cooled rapping device provided by the utility model;

[0026] Figure 5 This is a cross-sectional view of the installation rib plate of the water-cooled rapping device provided by the utility model.

[0027] Reference numerals:

[0028] 1-through-the-wall rapping rod, 2-in-furnace rapping rod, 3-first prefabricated rib plate, 4-installing rib plate, 5-water inlet, 6-water outlet, 7-metal hose, 8-striking rod head, 9-heat exchange tube bundle, 10-membrane wall, 11-furnace wall; 12-customized elbow; 13-second prefabricated rib plate; 14-first upper circular tube; 15-first lower circular tube; 16-second upper circular tube; 17-second lower circular tube. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 1 to Figure 5 The utility model provides a water-cooled rapping device for removing dust from the surface of a heat exchange tube bundle 9 located in a furnace wall 11. The rapping device comprises an in-furnace rapping rod 2 arranged in the furnace wall 11 and a through-wall rapping rod 1 arranged outside the furnace wall 11. The through-wall rapping rod 1 passes through the furnace wall 11 and is fixedly connected to the in-furnace rapping rod 2. The inner wall surface of the furnace wall 11 is a membrane wall 10.

[0033] The through-wall rapping rod 1 includes a first upper circular tube 14 and a first lower circular tube 15 arranged at intervals in the vertical direction, and the in-furnace rapping rod 2 includes a second upper circular tube 16 and a second lower circular tube 17 fixed to the tube body of the heat exchange tube bundle 9. The first upper circular tube 14 passes through the furnace wall 11 and is connected to the second upper circular tube 16, and the first lower circular tube 15 passes through the furnace wall 11 and is connected to the second lower circular tube 17. The second upper circular tube 16 and the second lower circular tube 17 are connected to each other away from one end of the through-wall rapping rod 1 connected thereto. Preferably, the second upper circular tube 16 and the second lower circular tube 17 are connected to one end of the through-wall rapping rod 1 connected thereto away from one end thereof through a customized elbow 12. The first lower circular tube 15 is provided with a water inlet 5 at one end outside the furnace wall 11, and the first upper circular tube 14 is provided with a water outlet 6 at the end outside the furnace wall 11, so as to form a cooling water flow path of "water inlet 5-first lower circular tube 15-custom elbow 12-second lower circular tube 17-second upper circular tube 16-first upper circular tube 14-water outlet 6". The rapping device introduces cooling water from the outside of the furnace wall 11. After the cooling water flows into the furnace wall 11, it absorbs the heat of the high-temperature flue gas and evaporates into water vapor or a steam-water mixture, and its density is reduced. It rises along the customized elbow and flows along the second upper circular tube 16 and the first upper circular tube 14, and finally flows out from the water outlet 6. During the flow process, the cooling water belt absorbs part of the heat of the high-temperature flue gas, thereby reducing the tube wall temperature of the rapping rod 2 in the furnace, reducing or avoiding the corrosion effect of the high-temperature flue gas on the rapping rod, and extending the service life of the rapping rod.

[0034] Preferably, the first upper circular tube 14 and the first lower circular tube 15 are arranged parallel to the horizontal plane and perpendicular to the furnace wall 11, the second upper circular tube 16 and the second lower circular tube 17 are arranged parallel to the horizontal plane and perpendicular to the furnace wall 11, the arrangement height of the second upper circular tube 16 corresponds to the first upper circular tube 14, and the arrangement height of the second lower circular tube 17 corresponds to the first lower circular tube 15, so that the cooling water flows in a manner parallel to the horizontal plane.

[0035] Furthermore, a striking rod head 8 is fixedly provided at one end of the first upper circular tube 14 and the first lower circular tube 15 outside the furnace wall 11, and the projections of the first upper circular tube 14 and the first lower circular tube 15 fall within the range of the striking rod head 8 to prevent the striking rod head 8 from being deviated when vibrating.

[0036] Further, the connection mode of the first upper circular tube 14 and the second upper circular tube 16 is welding, and the connection mode of the first lower circular tube 15 and the second lower circular tube 17 is welding; the connection of the first upper circular tube 14 and the second upper circular tube 16 and the connection of the first lower circular tube 15 and the second lower circular tube 17 are provided with a mounting rib plate 4, so that the in-furnace rapping rod 2 and the through-wall rapping rod 1 are firmly connected, so that the rapping force can be smoothly transmitted from the through-wall rapping rod 1 to the in-furnace rapping rod 2. The first upper circular tube 14 and the first lower circular tube 15 located in the furnace wall 11 are fixedly connected by the first prefabricated rib plate 3, and the second upper circular tube 16 and the second lower circular tube 17 are fixedly connected by the second prefabricated rib plate 13, so that the two circular tubes of the in-furnace rapping rod 2 are firmly connected to each other, and the two circular tubes of the through-wall rapping rod 1 are firmly connected to each other, further ensuring the transmission stability of the rapping force.

[0037] Furthermore, a sealing mechanism is provided between the portion of the through-wall rapping rod 1 located inside the furnace wall 11 and the furnace wall 11 to reduce air leakage. The water inlet 5 and the water outlet 6 are both provided with a metal hose 7, and an external water pipe is connected to the metal hose 7 to pass cooling water into the through-wall rapping rod 1, thereby reducing the impact of the vibration of the rapping rod on the external water pipe.

[0038] Furthermore, the rapping device includes at least one group of in-furnace rapping rods 2 and through-wall rapping rods 1. To improve the rapping and dust cleaning effect, multiple groups of in-furnace rapping rods 2 and through-wall rapping rods 1 may be arranged at intervals.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A water-cooled rapping device for removing dust from the surface of a heat exchange tube bundle (9), characterized in that: It comprises an in-furnace rapping rod (2) located in a furnace wall (11), and a through-wall rapping rod (1) that passes through the furnace wall (11) and is fixedly connected to the in-furnace rapping rod (2); The through-wall rapping rod (1) comprises a first upper circular tube (14) and a first lower circular tube (15) arranged at intervals in the vertical direction, and the in-furnace rapping rod (2) comprises a second upper circular tube (16) and a second lower circular tube (17) fixed to the tube body of the heat exchange tube bundle (9), the first upper circular tube (14) passes through the furnace wall (11) and is connected to the second upper circular tube (16), and the first lower circular tube (15) passes through the furnace wall (11) and is connected to the second lower circular tube (17); wherein, The second upper circular tube (16) and the second lower circular tube (17) are connected at one end away from the through-wall rapping rod (1) connected thereto, a water inlet (5) is provided at one end of the first lower circular tube (15) located outside the furnace wall (11), and a water outlet (6) is provided at the end of the first upper circular tube (14) located outside the furnace wall (11).

2. The rapping device according to claim 1, characterized in that: The ends of the second upper circular tube (16) and the second lower circular tube (17) away from the through-wall rapping rod (1) connected thereto are connected via a custom-made elbow (12).

3. The rapping device according to claim 1, characterized in that: A striking rod head (8) is fixedly provided at one end of the first upper circular tube (14) and the first lower circular tube (15) located outside the furnace wall (11), and the projections of the first upper circular tube (14) and the first lower circular tube (15) are both located within the range of the striking rod head (8).

4. The rapping device according to any one of claims 1 to 3, characterized in that: The parts of the first upper circular tube (14) and the first lower circular tube (15) located inside the furnace wall (11) are fixedly connected via a first prefabricated rib plate (3).

5. The rapping device according to any one of claims 1 to 3, characterized in that: The second upper circular tube (16) and the second lower circular tube (17) are fixedly connected via a second prefabricated rib plate (13).

6. The rapping device according to any one of claims 1 to 3, characterized in that: A mounting rib plate (4) is provided at the connection between the first upper circular tube (14) and the second upper circular tube (16) and at the connection between the first lower circular tube (15) and the second lower circular tube (17).

7. The rapping device according to any one of claims 1 to 3, characterized in that: A sealing mechanism is provided between the through-wall rapping rod (1) and the furnace wall (11).

8. The rapping device according to any one of claims 1 to 3, characterized in that: The first upper circular tube (14) and the second upper circular tube (16) are connected by welding, and the first lower circular tube (15) and the second lower circular tube (17) are connected by welding.

9. The rapping device according to any one of claims 1 to 3, characterized in that: The water inlet (5) and the water outlet (6) are both provided with a metal hose (7).

10. The rapping device according to any one of claims 1 to 3, characterized in that: The rapping device comprises at least one group of the in-furnace rapping rods (2) and the through-wall rapping rods (1).

Images