Rotatable gas energy shock wave soot blower

Abstract

The utility model discloses a rotatable gas energy shock wave soot blower, and relates to the technical field of soot blowers. The rotary soot blower comprises a controller, a gas source, a gas shock wave generator and a rotary soot blower, the rotary soot blower comprises a guide pipe, a mounting seat, a spray pipe, a rotating shaft and a motor; one end of the guide pipe is fixedly connected with the mounting seat, and the other end of the guide pipe is rotationally connected with the spray pipe; the rotating shaft is rotationally connected with the mounting seat and is arranged in the guide pipe in a penetrating manner; one end of the rotating shaft is in transmission connection with an output shaft of the motor, and the other end of the rotating shaft is fixedly connected with the spray pipe through a connecting rod; the spray pipe is a bent pipe; an inlet of the gas shock wave generator is communicated with the gas source, and an outlet of the gas shock wave generator is communicated with the guide pipe; and the controller is electrically connected with the gas shock wave generator and the motor and is used for controlling the gas shock wave generator to work and controlling the motor to rotate.

Description

Technical Field

[0001] This utility model belongs to the field of soot blower technology, and in particular relates to a rotatable pneumatic shock wave soot blower. Background Technology

[0002] For boilers, coking on the water-cooled walls and ash accumulation on the tail-end heating surfaces are common and unavoidable phenomena caused by combustion in the furnace. Severe ash accumulation can reduce the heat transfer efficiency of the superheater, reheater, economizer, and air preheater, while simultaneously increasing the flue gas temperature, thus jeopardizing the safe operation of the boiler unit. Therefore, coking and ash accumulation are problems in boiler operation, requiring regular internal cleaning. Boilers are typically designed with a certain number of sootblowers. Commonly used sootblowers include steam sootblowers and gas-fired shock wave sootblowers.

[0003] Steam sootblowers are traditional sootblowers that use high-speed jets of superheated steam for cleaning. The disadvantages of steam sootblowers are: firstly, they consume a large amount of steam and lower the dew point of the flue gas; secondly, the telescopic parts of retractable sootblowers are prone to deformation and jamming, the high calorific value of the steam can easily damage the heated surfaces and cause tube rupture, and they require a lot of maintenance, have large structural dimensions, and occupy a significant amount of space; and thirdly, there are dead zones in soot blowing.

[0004] The working principle of a gas-fired shockwave sootblower is to mix air and combustible gas in an appropriate ratio, ignite it at high frequency to produce a deflagration, and instantly generate a large amount of high-temperature, high-speed gas. This gas, in the form of a shockwave, vibrates and washes over the heated surface of the tube bundle, causing accumulated ash to splash and be carried away by the flue gas. The disadvantages of gas-fired shockwave sootblowers are: firstly, because they consume gas, the gas supply equipment needs to be replaced regularly, making operation relatively cumbersome; secondly, the impact of the high-frequency pulses can easily cause wear on the tube bundle; thirdly, the working medium is combustible gas, posing a safety hazard; and fourthly, there are blind spots in the sootblowing process.

[0005] In summary, a new technical solution is urgently needed to address the shortcomings of the existing technologies.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotatable gas shock wave soot blower, including a controller, a gas source, a gas shock wave generator and a rotary soot blowing device.

[0008] The rotary soot blowing device includes a guide tube, a mounting base, a nozzle, a rotating shaft, and a motor;

[0009] One end of the conduit is fixedly connected to the mounting base, while the other end is rotatably connected to the nozzle.

[0010] The rotating shaft is rotatably connected to the mounting base and passes through the conduit;

[0011] One end of the rotating shaft is connected to the output shaft of the motor for transmission, and the other end of the rotating shaft is fixedly connected to the nozzle through a connecting rod;

[0012] The motor has a dual output shaft structure. The output shaft of the motor that is opposite to the rotating shaft is connected to a position sensor. The position sensor is used to detect the current angle of the output shaft.

[0013] The nozzle is a curved pipe;

[0014] The inlet of the gas shock wave generator is connected to the gas source, and the outlet of the gas shock wave generator is connected to the conduit.

[0015] The controller is electrically connected to the gas shock wave generator, the motor, and the position sensor. It is used to control the operation of the gas shock wave generator and the rotation of the motor. It is also used to receive the signal emitted by the position sensor and convert the signal into position data.

[0016] In one embodiment of this utility model, the position sensor is a photoelectric encoder disk.

[0017] In one embodiment of this utility model, the two ends of the connecting rod are fixedly connected to the inner wall of the rotating shaft and the nozzle, respectively.

[0018] In one embodiment of this utility model, at least three connecting rods are provided, and they are distributed at equal angles around the axis of the rotating shaft.

[0019] In one embodiment of this utility model, a boiler control system is further included. The boiler control system is electrically connected to the controller and is used to send boiler operating parameters to the controller. The controller responds to the operating parameters to control the motor and the gas shock wave generator.

[0020] In one embodiment of this utility model, a cloud server is also included. The cloud server is connected to the boiler control system and the controller via communication. The cloud server is used to receive and store data uploaded by the boiler control system and the controller, and is also used to transmit data between the boiler control system and the controller.

[0021] In one embodiment of this utility model, the output shaft of the motor is connected to the rotating shaft via a coupling.

[0022] Compared with the prior art, the technical effects achieved by this utility model are as follows:

[0023] 1. The position sensor can accurately determine the current orientation of the nozzle, so as to enable precise control of the nozzle's orientation;

[0024] 2. Because the angle of the nozzle can be precisely controlled, precise ash blowing can be achieved without any blind spots in ash blowing;

[0025] 3. Using gas shock waves for soot blowing avoids many safety risks associated with using gas, and also has advantages in terms of structural complexity and maintenance compared to steam soot blowing.

[0026] 4. It can operate automatically according to the operating parameters of the boiler control system, eliminating the need for manual operation and featuring high efficiency and safety. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a rotatable pneumatic shock wave soot blower according to an embodiment of the present invention.

[0028] Figure 2 This is an exploded view of the rotating shaft according to an embodiment of the present invention.

[0029] Explanation of key figure labels:

[0030] 1. Gas source; 2. Gas shock wave generator; 3. Rotary soot blowing device; 31. Conduit; 32. Mounting base; 33. Nozzle; 34. Rotating shaft; 341. Core rod; 3411. First through hole; 342. Sleeve; 3421. Second through hole; 35. Connecting rod; 36. Motor; 37. Coupling; 4. Position sensor; 5. Controller; 6. Boiler control system; 7. Cloud server. Detailed Implementation

[0031] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0032] The technical solution of this utility model is illustrated below through specific embodiments. It should be understood that the one or more steps mentioned in this utility model do not preclude the existence of other methods and steps before or after the combined steps, or that other methods and steps may be inserted between these explicitly mentioned steps. It should also be understood that these examples are for illustrative purposes only and are not intended to limit the scope of this utility model. Unless otherwise stated, the numbering of each method step is only for the purpose of identifying each method step, and not for limiting the order of each method or defining the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantial changes to the technical content, can also be considered as within the scope of implementation of this utility model.

[0033] The raw materials and instruments used in the examples are not subject to any specific restrictions on their source; they can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0034] like Figure 1 As shown, the rotatable gas shock wave soot blower according to a preferred embodiment of the present invention includes a controller 5, a gas source 1, a gas shock wave generator 2, and a rotary soot blowing device 3.

[0035] Gas source 1 is connected to the inlet of gas shock wave generator 2. Gas source 1 can be a high-pressure storage tank containing a gaseous medium, or it can be a device for on-site preparation of the gaseous medium. The function of gas source 1 is to supply the gaseous medium to gas shock wave generator 2. The gaseous medium can be a stable gas such as nitrogen or air.

[0036] The gas shock wave generator 2 is an existing technology product that can act on a gas medium and generate shock waves. The gas flow velocity can reach Mach 2-4 when the shock wave is generated, and the duration of a single shock wave is greater than 100 ms.

[0037] The rotary soot blowing device 3 includes a guide tube 31, a mounting base 32, a nozzle 33, a rotating shaft 34, and a motor 36.

[0038] One end of the guide tube 31 is fixedly connected to the mounting base 32 by bolts, and the other end of the guide tube 31 is rotatably connected to the nozzle 33 via a sliding bearing. The diameter of the nozzle 33 is smaller than the diameter of the guide tube 31. A rotating shaft 34 is rotatably connected to the mounting base 32 and passes through the guide tube 31. One end of the rotating shaft 34 is connected to the output shaft of the motor 36 via a coupling 37, and the other end of the rotating shaft 34 is fixedly connected to the nozzle 33 via connecting rods 35. Specifically, three connecting rods 35 are provided, and the connecting rods 35 are evenly distributed around the axis of the rotating shaft 34. The two ends of the connecting rods 35 are welded to the inner walls of the rotating shaft 34 and the nozzle 33, respectively. The motor 36 has controllable speed and position, and can accurately stop the output shaft at the required angle. When the motor 36 rotates, it can drive the nozzle 33 to rotate via the rotating shaft 34. The nozzle 33 is a curved pipe, which allows the nozzle 33 to be oriented in different positions, thus enabling the nozzle 33 to be oriented within a 360° range.

[0039] Furthermore, the rotating shaft 34 has a telescopic structure, comprising a core rod 341 and a sleeve 342, which are coaxially fitted together. Multiple first through holes 3411 are provided along the axis of the core rod 341, while the sleeve 342 has second through holes 3421. By aligning the second through holes 3421 with different first through holes 3411, the length of the rotating shaft 34 can be changed. The core rod 341 and the sleeve 342 can be fixed with bolts and nuts. The adjustable rotating shaft 34 can change the extension distance of the nozzle, so adjusting the nozzle position according to usage needs can achieve a better dust removal effect.

[0040] The outlet of the gas shock wave generator 2 is connected to the side wall of the duct 31 via a flange structure. The shock wave and high-speed airflow generated by the gas shock wave generator 2 can be ejected outward through the nozzle 33. After exiting the nozzle 33, the shock wave forms a spherical shock wave. The diameter of the spherical shock wave continuously increases, and its center moves forward along the axis of the guide nozzle. At the same time, as the diameter of the spherical shock wave increases, the intensity of the shock wave continuously decreases, eventually weakening into a sound wave. Within the confined space of the boiler flue, the shock wave will be reflected and refracted by the four walls of the flue. The shock wave will be transmitted, refracted, and reflected between the tube bundles of the heated surface. Within the confined space, the effective action space of the shock wave is larger than that in free space. The shock wave will be reflected at the physical interface between the ash and the substrate and can be refracted into the interior of the ash. The intense pressure longitudinal wave of the shock wave exerts a pressure-and-tension effect on the ash, causing the ash to break. The refracted shock wave introduced into the ash will also generate transverse waves in the ash body, which interact with the incident and reflected waves, causing the ash to detach from the substrate. The impact kinetic energy of the high-intensity shock wave, accompanied by the high-speed gas generated simultaneously, can effectively clean the ash and coke deposits on the boiler heating surface.

[0041] In this embodiment, motor 36 has a dual output shaft structure, that is, two output shafts extend symmetrically in opposite directions along the same axis. The output shaft of motor 36, away from the rotating shaft 34, is connected to position sensor 4 to detect the current angle of the output shaft. Position sensor 4 is a photoelectric encoder. Photoelectric encoders have the advantages of stability, reliability, durability, and high precision, and when paired with motor 36, they can better leverage the advantages of high precision.

[0042] The controller 5 can be a PLC. The controller 5 is electrically connected to the position sensor 4, receiving signals from the position sensor 4 and converting them into position data. This allows the controller 5 to determine the current angle of the nozzle 33, facilitating intuitive and accurate control of the nozzle 33. The controller 5 is also electrically connected to the gas shock generator 2 and the motor 36, controlling the operation of the gas shock generator 2 and the rotation of the motor 36, specifically controlling the orientation of the nozzle 33, the intensity of the shock wave, and the number of shock waves.

[0043] In some instances, controller 5 can be controlled by manually inputting commands or according to a predetermined program. In other instances, the rotatable gas-powered shockwave sootblower also includes a boiler control system 6 and a cloud server 7. Controller 5 is electrically connected to the boiler control system 6, which sends boiler operating parameters to controller 5. Controller 5 then controls motor 36 and gas shockwave generator 2 in response to these operating parameters. Operating parameters can include boiler combustion time, combustion intensity, or tail gas oxygen content, allowing for more accurate analysis of the boiler's current operating status and more precise sootblowing. This process can involve feedback control of operating parameters according to a predetermined program or analysis of operating parameters using algorithms. Regardless of the chosen control method, no program modifications are involved within controller 5. However, incorporating algorithms into the controller can result in better control performance, such as intelligent adjustment of sootblowing points, blowing direction, shockwave intensity, and number of sootblowing cycles, as well as targeted removal of heavily accumulated ash.

[0044] The cloud server 7 establishes a communication connection with the controller 5 and the boiler control system 6 via a network, which can be either wired or wireless. The cloud service's functions include at least receiving and storing data uploaded by the boiler control system 6 and the controller 5, and transmitting data between the two systems, ensuring stable and reliable transmission through redundant transmission links. When the controller uses algorithms for control, the server can also train, iterate, and upgrade the algorithms on the controller based on the uploaded data.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A rotatable pneumatic shockwave soot blower, characterized in that, Includes a controller, a gas source, a gas shock wave generator, and a rotary soot blowing device; The rotary soot blowing device includes a guide tube, a mounting base, a nozzle, a rotating shaft, and a motor; One end of the conduit is fixedly connected to the mounting base, while the other end is rotatably connected to the nozzle. The rotating shaft is rotatably connected to the mounting base and passes through the conduit; One end of the rotating shaft is connected to the output shaft of the motor for transmission, and the other end of the rotating shaft is fixedly connected to the nozzle through a connecting rod; The motor has a dual output shaft structure. The output shaft of the motor that is opposite to the rotating shaft is connected to a position sensor. The position sensor is used to detect the current angle of the output shaft. The nozzle is a curved pipe; The inlet of the gas shock wave generator is connected to the gas source, and the outlet of the gas shock wave generator is connected to the conduit. The controller is electrically connected to the gas shock wave generator, the motor, and the position sensor. It is used to control the operation of the gas shock wave generator and the rotation of the motor. It is also used to receive the signal emitted by the position sensor and convert the signal into position data.

2. The rotatable pneumatic shockwave soot blower according to claim 1, characterized in that, The position sensor is a photoelectric encoder disk.

3. The rotatable pneumatic shock wave soot blower according to claim 1, characterized in that, The rotating shaft includes a core rod and a sleeve that fit together coaxially.

4. The rotatable pneumatic shock wave soot blower according to claim 1, characterized in that, The two ends of the connecting rod are fixedly connected to the inner wall of the rotating shaft and the nozzle, respectively.

5. The rotatable pneumatic shock wave soot blower according to claim 4, characterized in that, The connecting rods are provided in at least three parts and are distributed at equal angles around the axis of the rotating shaft.

6. The rotatable pneumatic shock wave soot blower according to claim 1, characterized in that, It also includes a boiler control system, which is electrically connected to the controller and is used to send boiler operating parameters to the controller; the controller responds to the operating parameters to control the motor and the gas shock wave generator.

7. The rotatable pneumatic shock wave soot blower according to claim 6, characterized in that, It also includes a cloud server, which is connected to the boiler control system and the controller via communication. The cloud server is used to receive and store data uploaded by the boiler control system and the controller, and is also used to transmit data between the boiler control system and the controller.

8. The rotatable pneumatic shock wave soot blower according to claim 1, characterized in that, The output shaft of the motor is connected to the rotating shaft via a coupling.

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