On-line ash removal device for boiler

Abstract

The utility model provides a boiler on-line deashing device which comprises a moving trolley, an explosion chamber, an injection pipe, an ignition system, an oxygen supply system, an acetylene supply system and a cooling water supply system, the explosion chamber is arranged on the upper portion of the moving trolley, and the explosion chamber can swing up and down and left and right relative to the moving trolley. The injection pipe is arranged on the outer side of the explosion chamber and communicated with the explosion chamber, the outer end of the injection pipe is sleeved with a blocking cloth bag, the ignition system comprises an ignition needle, the ignition end of the ignition needle is located in the explosion chamber, the oxygen supply system supplies oxygen to the interior of the explosion chamber, and the acetylene supply system supplies acetylene to the explosion chamber. And the cooling water supply system is used for cooling the explosion chamber and the injection pipe. According to the ash removal device, only one blocking cloth bag with a small specification is consumed each time, so that the ash removal cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler ash cleaning, in particular to an on-line boiler ash cleaning device. Background Art

[0002] On-line boiler ash cleaning is a technology for removing ash deposits inside a boiler during boiler operation, which can effectively improve the cleaning effect and operation efficiency of the boiler.

[0003] At present, in waste incineration power plants, the principle of high-pressure gas injection is often used to achieve on-line boiler ash cleaning. The devices for realizing the principle of high-pressure gas injection mainly include a conveying pipe and an explosive gas mixing cloth bag. When on-line ash cleaning is required, the mixing cloth bag is first tied to the air outlet end of the conveying pipe. After a certain amount of oxygen and acetylene are conveyed into the mixing cloth bag by the conveying pipe, the mixed gas in the mixing cloth bag is ignited, and the mixed gas explodes, and then high-pressure air flow is generated instantaneously to achieve on-line ash cleaning inside the boiler. The existing mixing cloth bags generally have a specification of about 0.4 meters in diameter * 1.5 meters in length. Each ash cleaning requires the consumption of one mixing cloth bag. Long-term ash cleaning operations result in a large consumption quantity of mixing cloth bags, and thus the ash cleaning operation cost is relatively high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an on-line boiler ash cleaning device, which only consumes a very small plugging cloth bag each time, thereby greatly reducing the ash cleaning cost.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an on-line boiler ash cleaning device, including a mobile trolley, an explosion chamber, a spray pipe, an ignition system, an oxygen supply system, an acetylene supply system, and a cooling water supply system. The explosion chamber is arranged above the mobile trolley, and the explosion chamber can swing up and down and left and right relative to the mobile trolley. The explosion chamber includes an inner shell and an outer shell. The inner shell is arranged inside the outer shell, and a first cooling chamber is reserved between the outer shell and the inner shell. The spray pipe includes an outer pipe and an inner pipe. The inner pipe is sleeved inside the outer pipe, and a second cooling chamber is reserved between the outer pipe and the inner pipe. The outer pipe is fixedly arranged on the outer side wall of the outer shell. The inner pipe is fixedly arranged on the outer side wall of the inner shell and is communicated with the inside of the inner shell. The first cooling chamber and the second cooling chamber are communicated, and the end of the second cooling chamber far away from the outer shell is in a closed state. A plugging cloth bag is sleeved on the outer end of the outer pipe. The ignition system includes an ignition needle, and the ignition end of the ignition needle is located inside the inner shell. The oxygen supply system supplies oxygen to the inside of the inner shell. The acetylene supply system supplies acetylene to the inside of the inner shell. The cooling water supply system includes a water inlet pipe and a water outlet pipe. The water inlet pipe is communicated with the second cooling chamber, and the water outlet pipe is communicated with the first cooling chamber.

[0006] Preferably, the mobile trolley includes a support frame, on which a support base is provided. At both ends of the support base, a first support shaft is respectively provided. The two first support shafts are respectively sleeved in bearings provided on the support frame. At the bottom of the outer shell, a second support shaft is provided. The second support shaft is vertically sleeved in a first through hole on the support base, and the second support shaft can swing freely relative to the support base.

[0007] Further, a swing assist handle is provided at the front of the support base, and the spray pipe is located at the rear of the outer shell.

[0008] Further, a sink is provided at the upper part of the first through hole, and a plain bearing is provided in the sink. The second support shaft is sleeved in the plain bearing.

[0009] Further, a first annular guide groove distributed along its circumferential direction is provided at the outer end of one of the first support shafts. A number of first hemispherical positioning grooves are provided in the first annular guide groove at equal intervals along its circumferential direction. A first positioning mechanism is provided outside the first annular guide groove. The first positioning mechanism includes a first ∩-shaped frame, a first positioning pin, and a first spring. The first ∩-shaped frame is fixedly provided on the support frame. At the bottom of the first positioning pin, a first hemispherical positioning head adapted to the first hemispherical positioning groove is provided. A first limiting plate is provided at a position slightly below the middle of the first positioning pin. The first positioning pin is vertically movably sleeved on the first ∩-shaped frame. The first spring is sleeved on the first positioning pin and the first spring is clamped between the first ∩-shaped frame and the first limiting plate. The first hemispherical positioning head can be inserted into the first hemispherical positioning groove directly below it under the push of the first spring.

[0010] Furthermore, both the outer shell and the inner shell are circular structures. A second annular guiding groove is provided on the bottom plane of the outer shell and is distributed along its circumferential direction. A number of second hemispherical positioning grooves are arranged at equal intervals along its circumferential direction in the second annular guiding groove. A second limiting mechanism is provided at the lower part of the support base. The second positioning mechanism includes a second ∩-shaped frame, a second positioning pin, and a second spring. The second ∩-shaped frame is fixedly arranged at the lower part of the support base. A second hemispherical positioning head adapted to the second hemispherical positioning groove is provided at the upper part of the second positioning pin. A second limiting plate is arranged at a position slightly above the middle of the second positioning pin. The second positioning pin is vertically movably sleeved on the second ∩-shaped frame and the support base, and the upper part of the second positioning pin penetrates through the support base. The second spring is sleeved on the second positioning pin and is clamped between the support base and the second limiting plate. The second hemispherical positioning head can be inserted into the second hemispherical positioning groove directly above it under the push of the second spring.

[0011] Furthermore, both the outer tube and the inner tube are conical structures, and the conical tips of the outer tube and the inner tube are away from the outer shell.

[0012] Furthermore, the water outlet end of the water inlet pipe communicates with the end of the second cooling chamber away from the outer shell.

[0013] Furthermore, the cooling water supply system further includes a water pump and a water tank. The water pump is arranged in the water tank. The water tank is filled with cooling water. The water inlet end of the water inlet pipe communicates with the water outlet end of the water pump. The water outlet end of the water outlet pipe communicates with the water tank.

[0014] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and convenient for processing and manufacturing; by utilizing the moving ability of the mobile trolley, the device can be flexibly moved to the vicinity of the boiler ash cleaning port, thus facilitating subsequent ash cleaning operations; the spray pipe can swing up and down and left and right under the support of the support base, so as to accurately aim at the ash accumulation area inside the boiler, and then use the high-pressure air flow ejected from the spray pipe to achieve precise impact on the ash accumulation, realizing effective cleaning of the ash accumulation; by utilizing the positioning functions of the first positioning mechanism and the second positioning mechanism, the stable positioning of the spray pipe can be effectively achieved, providing convenience for the subsequent ash cleaning operation; the inner pipe is in a conical structure, which is conducive to generating high-pressure and high-speed spray air flow; during the ash cleaning operation, cooling water is continuously introduced into the first cooling chamber and the second cooling chamber, thus effectively reducing the surface temperature of the spray pipe and the explosion chamber, and then improving the safety of the ash cleaning operation. The cooling water flows into from the second cooling chamber and flows out from the first cooling chamber, which can improve the heat and cold exchange effect; in this device, the explosion chamber is used to replace the existing explosion cloth bag to generate high-pressure air flow, avoiding the consumption of the explosion cloth bag and the explosion chamber can be reused. Further, in this device, only a very small plugging cloth bag is consumed for each explosion ash cleaning operation. The plugging cloth bag is used to plug the nozzle of the inner pipe to prevent gas from running out during inflation. Therefore, the specification of the plugging cloth bag is very small, and the small specification means low cost, thus greatly reducing the ash cleaning cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some preferred embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the side view of the overall structure of the present utility model;

[0018] Figure 3 is the longitudinal sectional view of the explosion chamber and the spray pipe;

[0019] Figure 4 is the top view of the bottom of the outer shell;

[0020] Figure 5 is the longitudinal sectional view of the first limiting mechanism;

[0021] Figure 6 is Figure 1 the enlarged view of part A in

[0022] Figure 7 is Figure 2 the enlarged view of part B in

[0023] In the figure: 1 is a moving trolley, 11 is a support frame, 12 is a support base, 121 is a first support shaft, 1211 is a first annular guide groove, 1212 is a first hemispherical positioning groove, 122 is a plain bearing, 123 is a swing auxiliary handle, 13 is a bearing seat, 14 is a universal wheel, 2 is an explosion chamber, 21 is an inner shell, 22 is an outer shell, 221 is a second support shaft, 222 is a second annular guide groove, 223 is a second hemispherical positioning groove, 23 is a first cooling chamber, 3 is a spray pipe, 31 is an outer pipe, 32 is an inner pipe, 33 is a second cooling chamber, 34 is a sealing cloth bag, 4 is an ignition needle, 5 is an oxygen delivery pipe, 6 is an acetylene delivery pipe, 71 is a water inlet pipe, 72 is a water outlet pipe, 8 is a first positioning mechanism, 81 is a first ∩-shaped frame, 82 is a first positioning pin, 821 is a first limiting plate, 83 is a first spring, 9 is a second positioning mechanism, 91 is a second ∩-shaped frame, 92 is a second positioning pin, 921 is a second limiting plate, 93 is a second spring. Specific embodiments

[0024] The following will combine specific embodiments and the attached Figure 1-7 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art can make similar deformations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0025] The present invention provides a boiler online soot cleaning device (such as Figure 1As shown in the figure, it includes a mobile trolley 1, an explosion chamber 2, a spray pipe 3, an ignition system, an oxygen supply system, an acetylene supply system, and a cooling water supply system. The mobile trolley 1 is mainly used to smoothly move the entire device to facilitate manual assistance for on-line boiler ash cleaning operations. The explosion chamber 2 is mainly used for the explosion of the mixed gas, generating high-pressure gas during the explosion. The spray pipe 3 is used to direct the high-pressure gas generated by the explosion in the explosion chamber 2. The high-pressure air flow ejected by the spray pipe 3 impacts the ash deposits on the inner side wall of the boiler to achieve the cleaning of the ash deposits; the ignition system is used to ignite the mixed gas in the explosion chamber 2. The explosion chamber 2 is arranged above the mobile trolley 1, and the explosion chamber 2 can swing up and down and left and right relative to the mobile trolley 1. The explosion chamber 2 includes an inner shell 21 and an outer shell 22, both of which are made of metal materials. The inner shell 21 is arranged inside the outer shell 22, and a first cooling chamber 23 is reserved between the outer shell 22 and the inner shell 21. The heat exchange medium continuously flows in the first cooling chamber 23, which is convenient for realizing the heat release and temperature reduction of the inner shell 21 and the outer shell 22. The spray pipe 3 includes an outer pipe 31 and an inner pipe 32, both of which are made of metal materials. The inner pipe 32 is sleeved inside the outer pipe 31, and a second cooling chamber 33 is reserved between the outer pipe 31 and the inner pipe 32. The heat exchange medium continuously flows in the second cooling chamber 33, which is convenient for realizing the heat release and temperature reduction of the outer pipe 31 and the inner pipe 32. The outer pipe 31 is fixedly arranged on the outer side wall of the outer shell 22, and the inner pipe 32 is fixedly arranged on the outer side wall of the inner shell 21 and is communicated with the inside of the inner shell 21. The first cooling chamber 23 and the second cooling chamber 33 are communicated, and the end of the second cooling chamber 33 far from the outer shell 22 is in a closed state. A blocking cloth bag 34 is sleeved on the outer end of the outer pipe 31. In practical applications, the blocking cloth bag 34 can be made of non-woven fabric. A circular rubber band is arranged around the mouth of the blocking cloth bag 34 to realize the stable sleeving of the blocking cloth bag 34 at the outer end of the outer pipe 31. When the mixed gas in the explosion chamber 2 explodes, the generated high-pressure air flow is ejected from the spray pipe 3. In the early stage of the ejection of the high-pressure air flow, the blocking cloth bag 34 sleeved at the nozzle will be directly impacted and removed, thus ensuring the smooth impact cleaning of the high-pressure air flow on the ash deposits on the boiler side wall;The ignition system includes an ignition needle 4, and the ignition end of the ignition needle 4 is located inside the inner shell 21. In practical applications, when a certain amount of mixed gas fills the inner shell 21, the combustion explosion of the mixed gas is achieved by starting the ignition needle 4. The oxygen supply system supplies oxygen to the inside of the inner shell 21. Specifically, the oxygen supply system includes an oxygen delivery pipe 5, which is in communication with an oxygen source and is also in communication with the inside of the inner shell 21. The acetylene supply system supplies acetylene to the inside of the inner shell. Specifically, the acetylene supply system includes an acetylene delivery pipe 6, which is in communication with an acetylene source and is also in communication with the inside of the inner shell 21. The cooling water supply system includes a water inlet pipe 71 and a water outlet pipe 72. The water inlet pipe 71 is in communication with the second cooling chamber 33, and the water outlet pipe 72 is in communication with the first cooling chamber 23. Specifically, the cooling water supply system further includes a water pump and a water tank. The water pump is arranged inside the water tank, and the water tank is filled with cooling water. The water inlet end of the water inlet pipe 71 is in communication with the water outlet end of the water pump, and the water outlet end of the water outlet pipe 72 is in communication with the water tank. In the actual application process, when the water pump operates, the cooling water in the water tank circulates in the second cooling chamber 33, the first cooling chamber 23, and the water tank. When the cooling water continuously flows in the first cooling chamber 23 and the second cooling chamber 33, the explosion chamber 2 and the injection pipe 3 are cooled and cooled, thereby improving the use safety of the present invention.;

[0026] On the basis of the above embodiments, the specific implementation manner of the explosion chamber 2 provided on the mobile trolley 1 is as follows: The mobile trolley 1 includes a support frame 11, and a support base 12 is arranged on the support frame 11. At both ends of the support base 12, a first support shaft 121 is respectively arranged, and the two first support shafts 121 are distributed relatively left and right. The two first support shafts 121 are respectively sleeved in the bearings arranged on the support frame 11. Specifically, bearing seats 13 corresponding to the first support shafts 121 are arranged on the support frame 11, and bearings are arranged inside the bearing seats 13. The first support shaft 121 is sleeved in the bearings of the bearing seats. A second support shaft 221 is arranged at the bottom of the outer shell 22, and the second support shaft 221 is vertically sleeved in a first through hole on the support base 12, and the second support shaft 221 can freely swing relative to the support base 12. By using the free rotation of the second support shaft 221, the explosion chamber 2 can freely rotate in the horizontal plane. To facilitate the rotational flexibility of the explosion chamber 2, here, a sink is arranged above the first through hole, and a plain bearing 122 is arranged in the sink. The second support shaft 221 is sleeved in the plain bearing 122; further, to facilitate the flexible adjustment of the injection direction of the injection pipe 3, here, a swing assist handle 123 is arranged at the front of the support base 12, and the injection pipe 3 is located at the rear of the outer shell 22.

[0027] After adjusting the vertical placement angle of the injection pipe 3, to facilitate the realization of vertical swing positioning, here, a first annular guide groove 1211 distributed along its circumferential direction is provided at the outer end of one of the first support shafts 121. A number of first hemispherical positioning grooves 1212 equally spaced along its circumferential direction are provided in the first annular guide groove 1211. A first positioning mechanism is provided outside the first annular guide groove 1211. The first positioning mechanism includes a first ∩-shaped frame 81, a first positioning pin 82, and a first spring 83. The first ∩-shaped frame 81 is fixedly provided on the support frame 11. A first hemispherical positioning head adapted to the first hemispherical positioning groove 1212 is provided at the bottom of the first positioning pin 82. A first limiting plate 821 is provided at a position below the middle of the first positioning pin 82. The first positioning pin 82 is vertically movably sleeved on the first ∩-shaped frame 81. The first spring 83 is sleeved on the first positioning pin 82 and the first spring 83 is clamped between the first ∩-shaped frame 81 and the first limiting plate 821. The first hemispherical positioning head can be inserted into the first hemispherical positioning groove 1212 directly below it under the push of the first spring 83. In practical applications, when the first hemispherical positioning head is inserted into the corresponding first hemispherical positioning groove 1212, the rotation limit of the first support shaft 121 is realized, and then the vertical movement positioning of the injection pipe 3 is realized. When manually assisting in rotating the first support shaft 121, to ensure that the first hemispherical positioning head can pop out of the first hemispherical positioning groove 1212, here, the radius of the first hemispherical positioning head is made 2-3 mm larger than the depth of the first hemispherical positioning groove 1212. In this way, the arc-shaped side wall of the first hemispherical positioning head is used as a sliding guide surface. Thus, when the first support shaft 121 is forcibly driven to rotate, the first hemispherical positioning head pops out of the corresponding first hemispherical positioning groove 1212, realizing the positioning release. As the first support shaft 121 continues to rotate, the first hemispherical positioning head can be inserted into the corresponding first hemispherical positioning groove 1212 again under the action of the first spring 83, and then the re-positioning of the first support shaft 121 can be realized.

[0028] On the basis of the above embodiments, to facilitate the rotational adjustment and positioning of the explosion chamber 2 in the horizontal plane, here, both the outer shell 22 and the inner shell 21 are circular structures. A second annular guide groove 221 is provided on the bottom plane of the outer shell 22 and distributed along its circumferential direction. A number of second hemispherical positioning grooves 2212 are equally spaced along its circumferential direction in the second annular guide groove 221. A second limiting mechanism is provided at the lower part of the support base 12. The second positioning mechanism includes a second ∩-shaped frame 91, a second positioning pin 92, and a second spring 93. The second ∩-shaped frame 91 is fixedly arranged at the lower part of the support base 12. A second hemispherical positioning head adapted to the second hemispherical positioning groove 2212 is provided at the upper part of the second positioning pin 92. A second limiting plate 921 is provided at a position above the middle of the second positioning pin 92. The second positioning pin 92 is vertically movably sleeved on the second ∩-shaped frame 91 and the support base 12, and the upper part of the second positioning pin 92 penetrates through the support base 12. The second spring 93 is sleeved on the second positioning pin 92 and the second spring 93 is clamped between the support base 12 and the second limiting plate 921. The second hemispherical positioning head can be inserted into the second hemispherical positioning groove 2212 located directly above it under the push of the second spring 93. In practical applications, when the second hemispherical positioning head is inserted into the corresponding second hemispherical positioning groove 223, the rotation limit of the outer shell 22 is achieved, and then the left and right swing positioning of the injection pipe 3 is realized. When manually assisting in rotating the outer shell 22, to ensure that the second hemispherical positioning head can pop out of the second hemispherical positioning groove 223, here, the radius of the second hemispherical positioning head is made 2-3 mm larger than the depth of the second hemispherical positioning groove 223. In this way, the arc-shaped side wall of the second hemispherical positioning head is used as a sliding guide surface. Thus, when the outer shell 22 is forcibly driven to rotate, the second hemispherical positioning head pops out of the corresponding second hemispherical positioning groove 223, realizing the release of the positioning. As the outer shell 22 continues to rotate, the second hemispherical positioning head can be inserted into the corresponding second hemispherical positioning groove 223 again under the action of the second spring 93, and then the repositioning of the outer shell 22 can be realized.

[0029] In practical applications, to improve the injection intensity of the high-pressure gas flow in the inner pipe 32, here, both the outer pipe 31 and the inner pipe 32 are conical structures, and the conical tips of the outer pipe 31 and the inner pipe 32 are far from the outer shell 22. Further, to improve the cooling effect of the cooling water, here, the water outlet end of the water inlet pipe 71 is communicated with the end of the second cooling chamber 33 far from the outer shell 22. Because during the ash cleaning operation, the outer end of the injection pipe 33 is inserted into the boiler through the ash cleaning port of the boiler, and the injection pipe 3 is directly heated and its temperature rises quickly. The low-temperature cooling water first enters the second cooling chamber 33, then large-temperature-difference heat exchange can be realized, and then it is convenient to improve the cooling effect of the injection pipe 3.

[0030] In the present utility model, "up", "down", "front", "back", "left" and "right" are all relative positions adopted for the convenience of describing the positional relationship, and thus cannot be understood as absolute positions to limit the protection scope.

[0031] Except for the technical features described in the specification, they are all well-known technologies to those skilled in the art.

[0032] As described above, the preferred embodiments and examples of the present utility model have been described in detail in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments and examples. For those of ordinary skill in the art in this technical field, without departing from the concept of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An on-line boiler soot cleaning device, characterized in that, It includes a mobile trolley, an explosion chamber, a spray pipe, an ignition system, an oxygen supply system, an acetylene supply system, and a cooling water supply system. The explosion chamber is arranged above the mobile trolley, and the explosion chamber can swing up and down and left and right relative to the mobile trolley. The explosion chamber includes an inner shell and an outer shell. The inner shell is arranged inside the outer shell, and a first cooling chamber is reserved between the outer shell and the inner shell. The spray pipe includes an outer pipe and an inner pipe. The inner pipe is sleeved inside the outer pipe, and a second cooling chamber is reserved between the outer pipe and the inner pipe. The outer pipe is fixedly arranged on the outer side wall of the outer shell. The inner pipe is fixedly arranged on the outer side wall of the inner shell and is communicated with the inside of the inner shell. The first cooling chamber and the second cooling chamber are communicated, and the end of the second cooling chamber far away from the outer shell is in a closed state. A blocking cloth bag is sleeved on the outer end of the outer pipe. The ignition system includes an ignition needle, and the ignition end of the ignition needle is located inside the inner shell. The oxygen supply system supplies oxygen to the inside of the inner shell. The acetylene supply system supplies acetylene to the inside of the inner shell. The cooling water supply system includes a water inlet pipe and a water outlet pipe. The water inlet pipe is communicated with the second cooling chamber, and the water outlet pipe is communicated with the first cooling chamber. The mobile trolley includes a support frame, and a support base is arranged on the support frame. A first support shaft is respectively arranged at both ends of the support base. The two first support shafts are respectively sleeved in bearings arranged on the support frame. A second support shaft is arranged at the bottom of the outer shell. The second support shaft is vertically sleeved in a first through hole on the support base, and the second support shaft can swing freely relative to the support base. A swing assist handle is arranged at the front of the support base. The spray pipe is located at the rear of the outer shell. A sink is arranged above the first through hole, and a plain bearing is arranged in the sink. The second support shaft is sleeved in the plain bearing.

2. The on-line soot cleaning device for a boiler according to claim 1, characterized in that, A first annular guide groove distributed along its circumferential direction is arranged at the outer end of one of the first support shafts. A number of first hemispherical positioning grooves equally spaced along its circumferential direction are arranged in the first annular guide groove. A first positioning mechanism is arranged outside the first annular guide groove. The first positioning mechanism includes a first ∩-shaped frame, a first positioning pin, and a first spring. The first ∩-shaped frame is fixedly arranged on the support frame. A first hemispherical positioning head adapted to the first hemispherical positioning groove is arranged at the bottom of the first positioning pin. A first limiting plate is arranged at a position below the middle of the first positioning pin. The first positioning pin is vertically movably sleeved on the first ∩-shaped frame. The first spring is sleeved on the first positioning pin and the first spring is clamped between the first ∩-shaped frame and the first limiting plate. The first hemispherical positioning head can be inserted into the first hemispherical positioning groove directly below it under the push of the first spring.

3. The on-line soot cleaning device for a boiler according to claim 2, wherein, Both the outer shell and the inner shell are circular in structure. A second annular guiding groove is provided on the bottom plane of the outer shell and is distributed along its circumferential direction. A number of second hemispherical positioning grooves are provided in the second annular guiding groove and are equally spaced along its circumferential direction. A second positioning mechanism is provided at the lower part of the support base. The second positioning mechanism includes a second ∩-shaped frame, a second positioning pin, and a second spring. The second ∩-shaped frame is fixedly arranged at the lower part of the support base. A second hemispherical positioning head adapted to the second hemispherical positioning groove is provided at the upper part of the second positioning pin. A second limiting plate is provided at a position above the middle of the second positioning pin. The second positioning pin is vertically movably sleeved on the second ∩-shaped frame and the support base, and the upper part of the second positioning pin penetrates through the support base. The second spring is sleeved on the second positioning pin and is clamped between the support base and the second limiting plate. The second hemispherical positioning head can be inserted into the second hemispherical positioning groove directly above it under the push of the second spring.

4. The on-line soot cleaning device for a boiler according to claim 1, characterized in that, Both the outer pipe and the inner pipe are conical in structure, and the conical tips of the outer pipe and the inner pipe are away from the outer shell.

5. The on-line soot cleaning device for a boiler according to claim 4, characterized in that The water outlet end of the water inlet pipe communicates with the end of the second cooling chamber away from the outer shell.

6. The on-line soot cleaning device for a boiler according to claim 5, characterized in that, The cooling water supply system further includes a water pump and a water tank. The water pump is arranged in the water tank. The water tank is filled with cooling water. The water inlet end of the water inlet pipe communicates with the water outlet end of the water pump. The water outlet end of the water outlet pipe communicates with the water tank.

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