Steam-driven rapping device of waste heat boiler

Abstract

The utility model provides a steam-driven rapping device of a waste heat boiler. The steam-driven rapping device comprises a rapping cylinder body, a rapping structure, a guide structure, an elastic device, a steam pressure stabilizing structure, a sealing device, a heat exchange device and a mounting structure, the rapping structure, the elastic device and the guide structure are all arranged on the inner side of the rapping cylinder body, the rapping structure is in sliding connection with the rapping cylinder body through the guide structure, one end of the elastic device is fixedly connected with the inner wall of the rapping cylinder body, and the other end of the elastic device is used for pressing the hammering end of the rapping structure. According to the steam-driven rapping device of the waste heat boiler, the problems that the heat exchange efficiency is reduced and the operation and maintenance cost of the waste heat boiler is high due to the fact that a rapping structure of a rapping device in the related technology is prone to being damaged are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler ash removal, and particularly relates to a steam-driven vibration device for a waste heat boiler. Background Art

[0002] Industrial waste heat exhaust gas contains a certain amount of dust to varying degrees. In order to utilize the waste heat resources of industrial waste gas, industrial waste heat boilers are often used as waste heat resource recovery devices to generate steam for industrial steam use or waste heat power generation. At present, mechanical vibration devices are generally used as the main ash cleaning devices for boilers, and other ash cleaning devices such as acoustic wave ash cleaning or shock wave ash cleaning devices are used as auxiliary supporting devices. The mechanical vibration device drives the vibration connecting rod to make a circular motion through the rotation of the vibration motor. The vibration connecting rod drives the vibration rod to rotate. The vibration rod is equipped with a vibration hammer. The inertia force of the vibration hammer is used to strike the impact rod, so as to produce a shaking effect on the boiler heating surface. The dust on the heating surface tube bundle falls off the heating surface tube bundle under the scouring of the flue gas and the shaking of the heating surface, achieving the purpose of ash cleaning. Due to the fact that the vibration devices in the related technologies are prone to mechanical failures such as damage to the vibration structure, for example, the vibration rod breaks, the vibration hammer falls off, and the position where the vibration hammer strikes the impact rod deviates from the set point, causing deformation of the impact rod, resulting in problems such as a decrease in heat exchange efficiency and high operation and maintenance costs of the waste heat boiler. Ash accumulation will form a thermal resistance, making the heat conduction effect worse, thereby affecting the thermal efficiency of the boiler; and due to component damage, mechanical vibration parts need to be frequently replaced, resulting in a large consumption of spare parts. In addition, a certain amount of electricity needs to be consumed. Summary of the Invention

[0003] In view of this, the utility model aims to solve at least one of the related technical problems to a certain extent.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A steam-driven vibration device for a waste heat boiler includes a vibration cylinder body, a vibration structure, a guiding structure, an elastic device, a steam pressure stabilizing structure, a sealing device, a heat exchange device and an installation structure;

[0006] The vibration structure, the elastic device, the sealing device and the guiding structure are all arranged inside the vibration cylinder body. The vibration structure is slidably connected with the vibration cylinder body through the guiding structure. One end of the elastic device is fixedly connected to the inner wall of the vibration cylinder body, and the other end of the elastic device is used to press the hammering end of the vibration structure;

[0007] The end of the vibration cylinder body is connected to the steam pressure stabilizing structure through a first steam inlet pipe, and the side of the vibration cylinder body is connected to the heat exchange device through a first exhaust pipe;

[0008] The outer wall of the vibration cylinder body is fixedly connected to the outer wall of the boiler through the installation structure.

[0009] Further, the rapping structure includes an impact rod and a rapping disc. The end of the impact rod is fixedly connected to the rapping disc. The impact rod is slidably connected to the guiding structure, and the rapping disc is directly opposite to the first steam inlet pipe.

[0010] Further, a hammering rubber block is provided on the front end face of the rapping disc.

[0011] Further, the elastic device includes an annular fixing plate and an elastic element. The annular fixing plate is arranged on the inner wall of the rapping cylinder body. One end of the elastic element abuts against the annular fixing plate, and the other end of the elastic element abuts against the rear end face of the rapping disc. In the natural state of the elastic element, the first exhaust pipe is located at the rear of the rapping disc.

[0012] Further, the guiding structure includes a first guiding block and a second guiding block. Both the first guiding block and the second guiding block are arranged on the inner wall of the rapping cylinder body. The inner sides of the first guiding block and the second guiding block are both slidably connected to the impact rod through ball bearings, and the sealing device is arranged between the first guiding block and the second guiding block.

[0013] Further, the steam pressure stabilizing structure includes a pressure stabilizing tank, an exhaust silencer and a safety valve. The pressure stabilizing tank is connected to the steam pipeline from the waste heat boiler through a second steam inlet pipe. The pressure stabilizing tank is connected to the first steam inlet pipe through a second exhaust pipe. The exhaust silencer is connected to the pressure stabilizing tank through a safety valve.

[0014] Further, the steam pressure stabilizing structure further includes a first solenoid valve and a second solenoid valve. The steam pipeline from the waste heat boiler is connected to the second steam inlet pipe through the first solenoid valve. The second exhaust pipe is connected to the first steam inlet pipe through the second solenoid valve. The first solenoid valve is connected to the pressure stabilizing tank through a pressure gauge.

[0015] Further, the heat exchange device is a heat exchanger. One end of the heat exchanger is connected to the first exhaust pipe, and the other end of the heat exchanger is provided with a blowdown pipe.

[0016] Further, the installation structure includes a first support plate and a second support plate. The rapping cylinder body is welded to the outer wall of the boiler through the first support plate and the second support plate.

[0017] Compared with the prior art, the steam-driven rapping device of the waste heat boiler of the present invention has the following advantages:

[0018] 1. The rapping structure is driven by steam, which can generate powerful vibrations and impact forces, effectively remove the ash deposited on the boiler heating surface, and ensure the thermal efficiency of the boiler. The impact rod and the rapping disc in the rapping structure are slidably connected through a guiding structure and cooperate with ball bearings to achieve stable reciprocating motion, reduce mechanical wear and failure rate, and improve the reliability and service life of the equipment.

[0019] 2. Using the steam generated by the waste heat boiler itself as the power source avoids additional power or other energy consumption, realizes the secondary utilization of energy, and improves the overall energy efficiency of the system. The steam-driven rapping device has a relatively simple structure, convenient control, strong adaptability, and guaranteed ash cleaning effect. By adjusting the pressure of the pressure stabilizing tank, the rapping intensity can be flexibly adjusted to improve the applicability of the steam rapping device to waste heat boilers under different working conditions; by adjusting the opening and closing frequency of the second solenoid valve, the rapping frequency of the boiler can be flexibly controlled to ensure that the ash deposited on the boiler heating surface is effectively removed. The steam-driven rapping device has no motors and complex mechanical transmission parts, reducing the risk of mechanical wear and electrical faults, thereby reducing the maintenance frequency and cost. As a clean energy source, steam does not produce additional pollutant emissions, which is beneficial to environmental protection. The heat exchange device can recover and utilize the waste heat during the steam discharge process to further improve the energy utilization rate. The steam-driven rapping device is applicable to various types of waste heat boilers, is not restricted by the installation location and space, and has strong adaptability and versatility.

[0020] 3. The steam pressure stabilizing structure can effectively control and stabilize the steam pressure, ensure that the rapping device works under a constant pressure, avoid the influence of pressure fluctuations on the equipment, and improve the stability and operation efficiency of the system. The pressure stabilizing tank and the safety valve can prevent the steam pressure from being too high, avoid damage to the rapping device and other related equipment, thereby extending the service life of the equipment and reducing the frequency of maintenance and replacement. The safety valve and the silencer in the steam pressure stabilizing structure can discharge the excess steam in time when the pressure is too high to prevent safety accidents such as overpressure explosion of the system. At the same time, the silencer can also reduce the noise generated during steam discharge and improve the working environment. The pressure stabilizing tank can buffer the pressure fluctuations of the steam, reduce the vibrations and impacts generated by the rapping device due to pressure changes during operation, protect the equipment and also improve the stability of the rapping effect. Brief Description of the Drawings

[0021] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 It is a schematic diagram of a steam-driven rapping device for a waste heat boiler according to an embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the vibration knocking cylinder structure according to the embodiment of the present utility model;

[0024] Figure 3 Schematic diagram of the vibration knocking structure according to the embodiment of the present utility model.

[0025] Explanation of the reference numerals:

[0026] 1. First steam inlet pipe; 2. Vibration knocking disc; 3. First exhaust pipe; 4. Elastic structure; 5. First support plate; 6. Second support plate; 7. Ring-shaped fixing plate; 8. First guide block; 9. Second guide block; 10. Vibration knocking cylinder; 11. Second solenoid valve; 12. Impact rod; 13. Boiler outer wall; 14. Sealing device; 20. Heat exchanger; 21. Drain pipe; 30. Pressure stabilizing tank; 31. First solenoid valve; 32. Pressure gauge; 33. Exhaust silencer; 34. Safety valve; 35. Steam supply pipeline from the waste heat boiler. Specific implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0030] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] A steam-driven rapping device for a waste heat boiler, as Figure 1 shown, includes a rapping cylinder body 10, a rapping structure, a guiding structure, a sealing device 14, an elastic device, a steam pressure stabilizing structure, a heat exchange device, and an installation structure; the rapping structure, the elastic device, the sealing device 14, and the guiding structure are all arranged inside the rapping cylinder body 10, the rapping structure is slidably connected to the rapping cylinder body 10 through the guiding structure, one end of the elastic device is fixedly connected to the inner wall of the rapping cylinder body 10, and the other end of the elastic device is used to press the hammering end of the rapping structure; the heat exchange device is a heat exchanger 20, one end of the heat exchanger 20 is connected to the first exhaust pipe 3, and a blowdown pipe 21 is arranged at the other end of the heat exchanger 20. Both the input and output ends of the heat exchanger are connected to the feed water of the waste heat boiler. Using the steam generated by the waste heat boiler itself as the power source, it avoids additional power or other energy consumption, realizes the secondary utilization of energy, and improves the overall energy efficiency of the system. The steam-driven rapping device has a relatively simple structure, convenient control, strong adaptability, and guaranteed dust removal effect. By adjusting the pressure of the pressure stabilizing tank, the rapping intensity can be flexibly adjusted, improving the applicability of the steam rapping device to waste heat boilers under different working conditions; by adjusting the opening and closing frequency of the second solenoid valve 11, the rapping frequency of the boiler can be flexibly controlled to ensure effective removal of ash on the heating surface of the boiler. The steam-driven rapping device has no motor and complex mechanical transmission parts, reducing the risk of mechanical wear and electrical faults, thereby reducing the maintenance frequency and cost. As a clean energy, steam does not produce additional pollutant emissions, which is beneficial to environmental protection. The heat exchange device can recover and utilize the waste heat during the steam discharge process, further improving the energy utilization rate. The steam-driven rapping device is applicable to various types of waste heat boilers, is not restricted by the installation position and space, and has strong adaptability and versatility.

[0032] As Figure 1-2 shown, the end of the rapping cylinder body 10 is connected to the steam pressure stabilizing structure through the first steam inlet pipe 1, and the side of the rapping cylinder body 10 is connected to the heat exchange device through the first exhaust pipe 3; the outer wall of the rapping cylinder body 10 is fixedly connected to the boiler outer wall 13 through the installation structure. The installation structure includes a first support plate 5 and a second support plate 6, and the rapping cylinder body 10 is welded to the boiler outer wall 13 through the first support plate 5 and the second support plate 6.

[0033] As Figure 3As shown in the figure, the rapping structure includes an impact rod 12 and a rapping disc 2. The end of the impact rod 12 is fixedly connected to the rapping disc 2. The impact rod 12 is slidably connected to the guiding structure, and the rapping disc 2 is opposite to the first steam inlet pipe 1. A hammering rubber block is provided on the front side end face of the rapping disc 2. The guiding structure includes a first guiding block 8 and a second guiding block 9. Both the first guiding block 8 and the second guiding block 9 are arranged on the inner wall of the rapping cylinder body 10. The inner sides of the first guiding block 8 and the second guiding block 9 are slidably connected to the impact rod 12 through balls. A sealing device 14 is arranged between the first guiding block 8 and the second guiding block 9, and the sealing device 14 is a labyrinth sealing structure. The rapping structure is driven by steam, can generate strong vibration and impact force, effectively remove the ash deposited on the boiler heating surface, and ensure the thermal efficiency of the boiler. The impact rod 12 and the rapping disc 2 in the rapping structure are slidably connected through the guiding structure and cooperate with the balls, which can realize stable reciprocating motion, reduce mechanical wear and failure rate, and improve the reliability and service life of the equipment.

[0034] The elastic device includes an annular fixing plate 7 and an elastic element. The annular fixing plate 7 is arranged on the inner wall of the rapping cylinder body 10. One end of the elastic element abuts against the annular fixing plate 7, and the other end of the elastic element abuts against the rear side end face of the rapping disc 2. In the natural state of the elastic element, the first exhaust pipe 3 is located at the rear side of the rapping disc 2. The elastic element can adopt a spring or an elastic telescopic tube.

[0035] The steam pressure stabilizing structure includes a pressure stabilizing tank 30, an exhaust silencer 33 and a safety valve 34. The pressure stabilizing tank 30 is connected to the steam pipeline 35 from the waste heat boiler through a second steam inlet pipe. The pressure stabilizing tank 30 is connected to the first steam inlet pipe 1 through a second exhaust pipe. The exhaust silencer 33 is connected to the pressure stabilizing tank 30 through the safety valve 34. The steam pressure stabilizing structure can effectively control and stabilize the steam pressure, ensure that the rapping device works under a constant pressure, avoid the influence of pressure fluctuation on the equipment, and improve the stability and operation efficiency of the system. The pressure stabilizing tank 30 and the safety valve 34 can prevent the steam pressure from being too high, avoid damage to the rapping device and other related equipment, thereby extending the service life of the equipment and reducing the frequency of maintenance and replacement. The safety valve 34 and the silencer in the steam pressure stabilizing structure can discharge the excess steam in time when the pressure is too high, prevent safety accidents such as overpressure explosion of the system. At the same time, the silencer can also reduce the noise during steam discharge and improve the working environment. The pressure stabilizing tank 30 can buffer the pressure fluctuation of the steam, reduce the vibration and impact generated by the rapping device due to pressure change during operation, protect the equipment and also improve the stability of the rapping effect.

[0036] The steam pressure stabilizing structure further includes a first solenoid valve 31 and a second solenoid valve 11. The steam pipeline 35 from the waste heat boiler is connected to the second steam inlet pipe through the first solenoid valve 31. The second exhaust pipe is connected to the first steam inlet pipe 1 through the second solenoid valve 11. The first solenoid valve 31 is connected to the pressure stabilizing tank 30 through a pressure gauge 32.

[0037] Working mode of this example

[0038] Part of the steam generated by the waste heat boiler itself enters the steam pressure stabilizing structure through the steam supply pipeline 35 of the waste heat boiler. The on-off of the steam is controlled by the first solenoid valve 31. The steam is connected to the pressure stabilizing tank 30. When the second solenoid valve 11 is opened, the steam is connected to the vibrating cylinder body 10, applying an impact force to the vibrating disc 2, driving the impact rod 12 to move forward rapidly, and at the same time compressing the elastic element. When the vibrating disc 2 moves rapidly forward to the nozzle position of the first discharge pipe, the steam starts to rapidly relieve pressure. When the impact rod moves forward rapidly and impacts the boiler heating surface tube bundle, causing it to vibrate, the second solenoid valve 11 is closed, and the steam impact force rapidly decreases. The vibrating disc 2 rapidly slows down its forward movement speed under the action of the elastic force of the elastic element until it stops moving forward. Then, when the elastic element recovers its elastic deformation, it pushes the vibrating disc 2 back to the starting position. By controlling the opening and closing frequency of the second solenoid valve, the frequency of cleaning the boiler heating surface tube bundle is achieved, and the purpose of effective cleaning is achieved. In addition, according to the ash accumulation situation of the heating surface tube bundle, or the dust concentration of the flue gas, the layout situation of the boiler heating surface tube bundle, etc., by adjusting the pressure of the pressure stabilizing tank, the vibration intensity can be adjusted to achieve efficient and stable cleaning of the waste heat boiler under different working conditions, and the purpose of improving the boiler thermal efficiency can be achieved.

[0039] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam-driven rapping device for a waste heat boiler, characterized in that: It comprises a rapping cylinder (10), a rapping structure, a guiding structure, an elastic device, a sealing device (14), a steam pressure stabilizing structure, a heat exchange device and a mounting structure; The rapping structure, the elastic device, the sealing device (14), and the guide structure are all arranged on the inner side of the rapping cylinder (10); the rapping structure is slidably connected to the rapping cylinder (10) via the guide structure; one end of the elastic device is fixedly connected to the inner wall of the rapping cylinder (10); and the other end of the elastic device is used to press the hammering end of the rapping structure; The end of the rapping cylinder (10) is connected to the steam pressure stabilizing structure via a first steam inlet pipe (1), and the side of the rapping cylinder (10) is connected to the heat exchange device via a first steam exhaust pipe (3); The outer wall of the rapping cylinder (10) is fixedly connected to the boiler outer wall (13) via the mounting structure.

2. The steam-driven rapping device for a waste heat boiler according to claim 1, characterized in that: The rapping structure comprises an impact rod (12) and a rapping disc (2), the end of the impact rod (12) is fixedly connected to the rapping disc (2), the impact rod (12) is slidably connected to the guide structure, and the rapping disc (2) is directly opposite to the first steam inlet pipe (1).

3. The steam-driven rapping device for a waste heat boiler according to claim 2, characterized in that: The front end surface of the rapping disc (2) is provided with a hammering rubber block.

4. The steam-driven rapping device for a waste heat boiler according to claim 2, characterized in that: The elastic device comprises an annular fixing plate (7) and an elastic element. The annular fixing plate (7) is arranged on the inner wall of the rapping cylinder (10). One end of the elastic element abuts against the annular fixing plate (7), and the other end of the elastic element abuts against the rear end surface of the rapping disc (2). When the elastic element is in a natural state, the first exhaust pipe (3) is located on the rear side of the rapping disc (2).

5. A steam-driven rapping device for a waste heat boiler according to any one of claims 2 to 4, characterized in that: The guide structure comprises a first guide block (8) and a second guide block (9), the first guide block (8) and the second guide block (9) are both arranged on the inner wall of the rapping cylinder (10), the inner sides of the first guide block (8) and the second guide block (9) are both slidably connected to the impact rod (12) via balls, and the sealing device (14) is arranged between the first guide block (8) and the second guide block (9).

6. The steam-driven rapping device for a waste heat boiler according to claim 1, characterized in that: The steam pressure stabilizing structure comprises a pressure stabilizing tank (30), an exhaust silencer (33) and a safety valve (34); the pressure stabilizing tank (30) is connected to a waste heat boiler steam pipeline (35) via a second steam inlet pipe; the pressure stabilizing tank (30) is connected to the first steam inlet pipe (1) via a second exhaust pipe; and the exhaust silencer (33) is connected to the pressure stabilizing tank (30) via a safety valve (34).

7. The steam-driven rapping device for a waste heat boiler according to claim 6, characterized in that: The steam pressure stabilizing structure further comprises a first solenoid valve (31) and a second solenoid valve (11); the waste heat boiler steam inlet pipe (35) is connected to the second steam inlet pipe via the first solenoid valve (31); the second steam exhaust pipe is connected to the first steam inlet pipe (1) via the second solenoid valve (11); and the first solenoid valve (31) is connected to the pressure stabilizing tank (30) via a pressure gauge (32).

8. The steam-driven rapping device for a waste heat boiler according to claim 1, characterized in that: The heat exchange device is a heat exchanger (20), one end of the heat exchanger (20) is connected to the first exhaust pipe (3), and the other end of the heat exchanger (20) is provided with a sewage pipe (21).

9. The steam-driven rapping device for a waste heat boiler according to claim 1, characterized in that: The mounting structure comprises a first support plate (5) and a second support plate (6), and the rapping cylinder (10) is welded to the boiler outer wall (13) via the first support plate (5) and the second support plate (6).

Images