CN219775769U - Soot blower and ash removal system thereof - Google Patents

Abstract

The utility model discloses a soot blower and a soot cleaning system thereof, which belong to the technical field of boiler soot cleaning, wherein the soot blower comprises: the device comprises a shell assembly, a shell assembly and a shell assembly, wherein the shell assembly comprises a fixing piece and a sealing piece arranged on one side of the fixing piece; a telescoping assembly including a telescoping member disposed within the seal; the spray pipe assembly comprises a spray pipe fitting and a driving piece, wherein the spray pipe fitting is rotationally fixed in the telescopic piece, and the driving piece is in transmission connection with the spray pipe fitting; the switch assembly comprises a soot blowing medium switch piece and an air switch piece, and the soot blowing medium switch piece and the air switch piece are respectively connected with the spray pipe piece through pipelines. The telescopic component replaces the existing threaded pipe, and the phenomenon that the normal operation of the short-blowing soot blower is influenced due to the damage of the threaded pipe is avoided.

Description

Soot blower and ash removal system thereof

Technical Field

The utility model relates to the technical field of boiler ash removal, in particular to a soot blower and an ash removal system thereof.

Background

The water wall of the boiler is generally provided with dozens to hundreds of hearth soot blowers, and the soot blowing medium is sprayed by the nozzles of the hearth soot blowers to remove attachments on the water wall. The hearth soot blower comprises a long-blowing soot blower, a short-blowing soot blower, a sound wave soot blower and the like, and is mainly used for cleaning coking on the water wall of the boiler. The existing short-blowing soot blower is characterized in that a spray pipe of the existing short-blowing soot blower is generally driven to rotate through a threaded pipe, when the short-blowing soot blower is used, particles in smoke dust can be attached to the threaded pipe, and in long-term threaded rotation of the threaded pipe, abrasion deformation or burr protrusion can be generated due to friction of the particles attached to the surface of the threaded pipe, so that normal operation of the threaded pipe is influenced, and further, normal operation of the short-blowing soot blower is influenced;

in addition, the control can not realize automatic control, and operators are required to operate and adjust the working time of the spray pipe, so that the workload of power plant staff is increased.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

The present utility model has been made in view of the above and/or problems with the conventional short-blow sootblowers when blowing sootblowers.

It is therefore an object of the present utility model to provide a sootblower that solves the problem that dust wears the threaded tube and affects the proper operation of a short-blow sootblower.

In order to solve the technical problems, the utility model provides the following technical scheme: a soot blower includes a housing assembly including a fixture and a seal disposed on one side of the fixture; a telescoping assembly including a telescoping member disposed within the seal; the spray pipe assembly comprises a spray pipe fitting and a driving piece, wherein the spray pipe fitting is rotationally fixed in the telescopic piece, and the driving piece is in transmission connection with the spray pipe fitting; the switch assembly comprises a soot blowing medium switch piece and an air switch piece, and the soot blowing medium switch piece and the air switch piece are respectively connected with the spray pipe piece through pipelines.

As a preferable mode of the soot blower of the present utility model, wherein: the fixing piece comprises a fixing plate, at least two threaded holes are formed in the fixing plate, and bolts are connected in the threaded holes in a threaded mode.

As a preferable mode of the soot blower of the present utility model, wherein: the sealing element comprises a sealing box which is detachably connected with the fixing plate, and a gasket is arranged between the sealing box and the fixing plate.

As a preferable mode of the soot blower of the present utility model, wherein: the telescopic part comprises a fixed sleeve, a sliding sleeve and a driving oil cylinder, wherein the sliding sleeve is slidably installed in the fixed sleeve, the output end of the driving oil cylinder is fixedly connected with the sliding sleeve, at least one sliding groove is formed in the inner wall of the fixed sleeve, the central axis of the sliding groove is parallel to the central axis of the fixed sleeve, a sliding block which is correspondingly arranged with the sliding groove is arranged on the outer wall of the sliding sleeve, and the sliding block is slidably connected with the sliding groove.

As a preferable mode of the soot blower of the present utility model, wherein: the spray pipe piece comprises a spray pipe, a bearing and a spray head, wherein the spray head is detachably arranged at one end, close to the fixing piece, of the spray pipe, the central axis of the spray pipe coincides with the central axis of the sliding sleeve, at least one bearing is arranged, the inner ring of the bearing is in interference fit with the outer wall of the spray pipe, and the outer ring of the bearing is in interference fit with the inner wall of the sliding sleeve.

As a preferable mode of the soot blower of the present utility model, wherein: the spray head comprises a body, an inner cavity is formed in the body, the inner cavity penetrates through the bottom of the body and forms an opening, the opening of the spray head is communicated with the inside of the spray pipe, two nozzles which are symmetrically arranged relative to the central axis of the body are arranged on the side wall of the body, the nozzles are communicated with the inner cavity, the central axes of the two nozzles are coincident, and the central axes of the two nozzles are perpendicular to the central axis of the inner cavity.

As a preferable mode of the soot blower of the present utility model, wherein: the top shape of the inner cavity is arc, the top wall of one side of the nozzle, which is far away from the bottom of the body, is perpendicular to the central axis of the inner cavity, the bottom wall of one side of the nozzle, which is close to the bottom of the body, is arc-shaped protruding towards the bottom of the body, and an arc-shaped transition part is arranged at the joint of the bottom wall of one side of the nozzle, which is close to the bottom of the body, and the outer wall of the body.

As a preferable mode of the soot blower of the present utility model, wherein: the driving piece comprises a driving motor, the driving motor is fixed on the sliding sleeve, a driving sprocket is arranged at the output end of the driving motor, a driven sprocket is fixed on the outer ring of the spray pipe, and the driving sprocket is connected with the driven sprocket through a chain.

As a preferable mode of the soot blower of the present utility model, wherein: the soot blowing medium switch piece comprises a soot blower valve, the air switch piece comprises an air valve, and the soot blower valve and the air valve are respectively communicated with the spray pipe through a pipeline.

The soot blower has the beneficial effects that: the telescopic component replaces the existing threaded pipe, so that abrasion of the threaded pipe is avoided, and the influence on normal operation of the short-blowing soot blower is avoided.

The second object of the present utility model is to provide an ash removal system, which is aimed at solving the problem that the existing soot blower needs an operator to judge and adjust the working time of the nozzle.

In order to solve the technical problems, the utility model provides the following technical scheme: the ash cleaning system comprises a control module, wherein the control module comprises a controller, and the controller is electrically connected with the telescopic piece, the driving piece and the switch assembly; the time module is electrically connected with the control module; the controller controls the expansion and contraction of the expansion piece, the work of the driving piece, and the switch of the soot blowing medium switch component and the air switch piece.

The ash removal system has the beneficial effects that: the controller automatically controls the expansion and contraction of the expansion piece, the work of the driving piece and the opening and closing of the soot blowing medium opening and closing piece and the air opening and closing piece, thereby replacing operators to judge and adjust the working time of the spray pipe by themselves, and reducing the workload of staff in a power plant.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a cross-sectional view of a sootblower.

FIG. 2 is a cross-sectional view of a telescoping assembly and a lance assembly of a sootblower.

FIG. 3 is a cross-sectional view of a telescoping assembly of a sootblower.

FIG. 4 is a block diagram of a lance assembly of a sootblower.

FIG. 5 is a block diagram of a sootblower nozzle.

FIG. 6 is a cross-sectional view of a lance tip of a sootblower.

Fig. 7 is a flowchart of the operation of the ash removal system.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to FIG. 1, a sootblower is provided in accordance with a first embodiment of the present utility model, comprising a housing assembly 100, a telescoping assembly 200, a lance assembly 300, and a switch assembly 400, wherein the housing assembly 100 is used for mounting the telescoping assembly 200, the lance assembly 300, and the switch assembly 400, the telescoping assembly 200 is used for driving the lance assembly 300 to telescope, the lance assembly 300 is used for injecting sootblowing medium or air, and the switch assembly 400 is used for controlling the lance assembly 300 to selectively inject sootblowing medium or air.

Specifically, the shell assembly 100 comprises a fixing piece 101 and a sealing piece 102, wherein the sealing piece 102 is fixed on the right side of the fixing piece 101, when the shell assembly is used, the fixing piece 101 is fixed on a water-cooled wall A, the sealing piece 102 is fixed on the fixing piece 101 again, a through hole is formed in the water-cooled wall A, the central axes of the fixing piece 101 and the sealing piece 102 are overlapped with the central axis of the through hole, and parts in the sealing piece 102 can sequentially pass through the through holes of the fixing piece 101 and the water-cooled wall A and extend to the outer side of the water-cooled wall A.

Preferably, the telescoping assembly 200 includes a telescoping member 201 disposed within the seal 102; the spray pipe assembly 300 comprises a spray pipe fitting 301 and a driving piece 302, wherein the spray pipe fitting 301 is rotationally fixed in the telescopic piece 201, and the driving piece 302 is in transmission connection with the spray pipe fitting 301; the telescopic assembly 200 drives the nozzle member 301 of the nozzle assembly 300 to move along the axial direction thereof, so that the end of the nozzle member 301 close to the fixing member 101 moves and passes through the through hole of the water-cooled wall A until the nozzle member extends to the outer side of the water-cooled wall A, and the driving member 302 drives the nozzle member 301 to rotate along the circumferential direction of the central axis of the nozzle member.

Further, the switch assembly 400 comprises a soot blowing medium switch element 401 and an air switch element 402, wherein the soot blowing medium switch element 401 and the air switch element 402 are respectively connected with the pipe 301 in a pipeline manner; when in use, the soot blowing medium switch piece 401 is opened, soot blowing medium enters the nozzle piece 301 through a pipeline and is sprayed onto the water-cooled wall A from the end part of the nozzle piece 301 close to the fixing piece 101, after the soot blowing medium switch piece 401 is closed, the air switch piece 402 is opened, and compressed air is sprayed from the nozzle piece 301 and is sprayed onto the water-cooled wall A.

When the device is used, the telescopic piece 201 drives the spraying pipe fitting 301 to move, the end part, close to the fixing piece 101, of the spraying pipe fitting 301 moves to the outer side of the water-cooled wall A, the soot blowing medium switch piece 401 is opened, soot blowing medium enters the spraying pipe fitting 301 through a pipeline and is sprayed onto the water-cooled wall A from the end part, close to the fixing piece 101, of the spraying pipe fitting 301, and the driving piece 302 drives the spraying pipe fitting 301 to synchronously rotate, so that the spraying pipe fitting 301 sprays the soot blowing medium and rotates; the soot blowing medium switch member 401 is then turned off, the air switch member 402 is turned on, compressed air is ejected from the nozzle member 301 and is ejected onto the water wall a, and the driving member 302 drives the nozzle member 301 to rotate synchronously, so that the nozzle member 301 rotates while ejecting the compressed air, and an adherent wind protection film uniformly flowing around is formed on the wall surface of the water wall a.

Example 2

Referring to fig. 1 to 6, this embodiment is based on the previous embodiment, which is a second embodiment of the present utility model.

Preferably, the fixing piece 101 comprises a fixing plate 101a, at least two threaded holes are formed in the fixing plate 101a, bolts are connected in the threaded holes in a threaded mode, a through hole is formed in the center of the fixing plate 101a, the through hole penetrates through the fixing plate 101a, the fixing plate 101a is fixed on the water-cooled wall A through the bolts in use, and the through hole is perpendicular to the fixing plate 101 a.

Preferably, the sealing member 102 includes a sealing box 102a, the sealing box 102a is detachably connected with the fixing plate 101a, a gasket 102b is arranged between the sealing box 102a and the fixing plate 101a, the sealing box 102a is cylindrical, the interior of the sealing box 102a is hollow, one end of the sealing box is closed, the opening of the sealing member 102 is arranged towards the fixing plate 101a, a flange is fixed on the side surface of the sealing box 102a, the gasket 102b is positioned between the flange and the fixing plate 101a, the sealing box 102a and the gasket 102b are fixed on the fixing plate 101a through bolts, and the gasket 102b plays a role of mechanical sealing.

Preferably, the telescopic member 201 comprises a fixed sleeve 201a, a sliding sleeve 201b and a driving oil cylinder 201c, the fixed sleeve 201a is fixed on the fixed plate 101a, the sliding sleeve 201b is slidably mounted in the fixed sleeve 201a, the driving oil cylinder 201c is fixed on the fixed sleeve 201a, two driving oil cylinders 201c are arranged, output ends of the two driving oil cylinders 201c are fixedly connected with the sliding sleeve 201b, at least one sliding groove 201a-1 is arranged on the inner wall of the fixed sleeve 201a, the central axis of the sliding groove 201a-1 is parallel to the central axis of the fixed sleeve 201a, four sliding grooves 201a-1 are arranged in the embodiment, the four sliding grooves 201a-1 are uniformly distributed along the circumferential direction of the fixed sleeve 201a, the outer wall of the sliding sleeve 201b is provided with sliding blocks 201b-1 which are arranged corresponding to the sliding grooves 201a-1, and the sliding blocks 201b-1 are slidably connected with the sliding grooves 201 a-1.

Preferably, the nozzle member 301 includes a nozzle 301a, a bearing 301b and a nozzle 301c, threads are disposed at the bottom of the nozzle 301c, the nozzle 301c is detachably disposed at one end of the nozzle 301a near the fixing member 101 through threads, the central axis of the nozzle 301a coincides with the central axis of the sliding sleeve 201b, at least one bearing 301b is disposed, two bearings 301b are disposed in this embodiment, inner rings of the two bearings 301b are in interference fit with outer walls of the nozzle 301a, outer rings of the two bearings 301b are in interference fit with inner walls of the sliding sleeve 201b, and in use, the nozzle 301a can move axially along with the sliding sleeve 201b under the action of the bearing 301b, and can also rotate circumferentially around the central axis of the nozzle member.

Preferably, the nozzle 301c includes a body 301c-1, an inner cavity 301c-2 is disposed in the body 301c-1, the inner cavity 301c-2 penetrates through the bottom of the body 301c-1 and forms an opening, the opening of the nozzle 301c is communicated with the interior of the nozzle 301a, two nozzles 301c-3 symmetrically disposed relative to the central axis of the body 301c-1 are disposed on the side wall of the body 301c-1, the nozzles 301c-3 are communicated with the inner cavity 301c-2, the central axes of the two nozzles 301c-3 coincide, and the central axes of the two nozzles 301c-3 are perpendicular to the central axis of the inner cavity 301c-2, in use, soot blowing medium or air in the nozzle 301a can be ejected from the two nozzles 301c-3 via the inner cavity 301 c-2.

Preferably, the top of the inner cavity 301c-2 is arc-shaped, a side wall of the nozzle 301c-3, which is far away from the bottom of the body 301c-1, is perpendicular to the central axis of the inner cavity 301c-2, a side wall of the nozzle 301c-3, which is close to the bottom of the body 301c-1, is arc-shaped protruding towards the bottom of the body 301c-1, i.e. the cross section of the nozzle 301c-3 in the vertical direction is semicircular, an arc-shaped transition portion 301c-4 is further arranged at the connection part of the side wall of the nozzle 301c-3, which is close to the bottom of the body 301c-1, and the outer wall of the body 301c-1, wherein compared with the circular shape, the injection range of the nozzle 301c-3 can be reduced, so that the injection range of the nozzle 301c-3, which is far away from the water wall A, is smaller, but the injection range of the nozzle 301c-3, which is close to the water wall A, is kept unchanged, is reduced in an ineffective purging range, and the utilization ratio of soot blowing medium is improved.

Preferably, the driving piece 302 includes a driving motor 302a, the driving motor 302a is fixed on the sliding sleeve 201b, a driving sprocket 302b is arranged at the output end of the driving motor 302a, a driven sprocket 302c is fixed on the outer ring of the spray pipe 301a, the driving sprocket 302b is connected with the driven sprocket 302c through a chain 302d, when in use, the driving motor 302a does work, the driving sprocket 302b is driven to rotate by the driving motor 302a, the driven sprocket 302c is driven to rotate by the driving sprocket 302b through the chain 302d, and the spray pipe 301a is driven to rotate by the driven sprocket 302 c.

Preferably, the sootblower medium switch member 401 includes a sootblower valve 401a, the air switch member 402 includes an air valve 402a, the sootblower valve 401a and the air valve 402a are respectively communicated with the lance 301a through a pipeline, when the sootblower valve 401a is opened, sootblower medium is ejected from the lance 301a and is ejected onto the water wall A, when the air valve 402a is opened, compressed air is ejected from the lance 301a and is ejected onto the water wall A, and when the sootblower valve 401a is not opened with the air valve 402 a.

When the device is used, when the driving oil cylinder 201c drives the sliding sleeve 201b to slide along the length direction of the sliding groove 201a-1, the spray pipe 301a is driven to slide left and right simultaneously until the nozzle 301c-3 of the spray pipe 301a extends out of the water-cooled wall A from the through hole of the water-cooled wall A, the driving motor 302a drives the spray pipe 301a to rotate, the soot blower valve 401a is opened, soot blowing medium enters the spray pipe 301a through a pipeline and is sprayed onto the water-cooled wall A from the nozzle 301c-3 of the spray pipe 301a, and the driving motor 302a drives the spray pipe 301 to synchronously rotate, so that the spray pipe 301a sprays the soot blowing medium and rotates simultaneously; the soot blower valve 401a is then closed, the air valve 402a is opened, compressed air is sprayed out of the spray pipe 301a and is sprayed on the water-cooled wall A, the spray pipe 301a is driven by the driving motor 302a to rotate synchronously, so that the spray pipe 301a sprays the compressed air and rotates simultaneously, an adherent wind protection film which uniformly flows around is formed on the wall surface of the water-cooled wall A, the telescopic component 200 replaces the existing threaded pipe, abrasion of the threaded pipe is avoided, and the influence on the normal operation of the short-blowing soot blower is avoided.

Example 3

Referring to fig. 1 to 7, a third embodiment of the present utility model is based on the first two embodiments, and provides an ash cleaning system, which includes the ash blowing device, a control module 500 and a time module 600, where the time module 600 is electrically connected to the control module 500, the control module 500 is used to control the expansion and contraction of the expansion and contraction member 201, the work of the driving member 302, and the switching of the sootblowing medium switching member 401 and the air switching member 402, and the time module 600 controls the operation time of the sootblowing medium switching member 401.

Specifically, the control module 500 includes a controller, where the controller is electrically connected to the expansion member 201, the driving member 302, and the switch assembly 400, and the controller controls expansion of the expansion member 201, work of the driving member 302, and switching of the sootblowing medium switch member 401 and the air switch member 402.

When the device is used, the controller firstly controls the operation of the driving oil cylinder 201c, drives the spray pipe 301a to slide left and right simultaneously when the sliding sleeve 201b is driven to slide along the length direction of the sliding groove 201a-1 until the end part of the spray pipe 301a, which is close to one end of the fixing piece 101, extends out of the water-cooled wall A from the through hole of the water-cooled wall A, the controller controls the driving motor 302a to operate, drives the spray pipe 301a to rotate, and then controls the soot blower valve 401a to open, and soot blowing medium enters the spray pipe 301a through a pipeline, so that the spray pipe rotates while spraying the soot blowing medium; after the air is rotated to the preset time set by the time module 600, the controller controls the soot blower valve 401a to be closed, then the controller controls the air valve 402a to be opened, compressed air is sprayed out of the spray pipe 301a and sprayed on the water-cooled wall A, and the controller controls the driving motor 302a to drive the spray pipe 301a to synchronously rotate, so that the spray pipe 301a sprays the compressed air and rotates, the working time of the spray pipe 301a is automatically judged and adjusted by an operator instead, and the workload of staff in a power plant is reduced.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. A soot blower, characterized in that: comprising the steps of (a) a step of,

a housing assembly (100) including a fixing member (101) and a sealing member (102) provided at one side of the fixing member (101);

-a telescopic assembly (200) comprising a telescopic member (201) arranged inside said sealing member (102);

the spray pipe assembly (300) comprises a spray pipe fitting (301) and a driving piece (302), wherein the spray pipe fitting (301) is rotationally fixed in the telescopic piece (201), and the driving piece (302) is in transmission connection with the spray pipe fitting (301);

the switch assembly (400) comprises a soot blowing medium switch piece (401) and an air switch piece (402), and the soot blowing medium switch piece (401) and the air switch piece (402) are respectively connected with the spray pipe piece (301) through pipelines.

2. The soot blower according to claim 1, wherein the fixing member (101) comprises a fixing plate (101 a), at least two threaded holes are provided in the fixing plate (101 a), and bolts are screwed into the threaded holes.

3. The sootblower of claim 2, wherein said seal (102) comprises a seal box (102 a), said seal box (102 a) being detachably connected to said stationary plate (101 a), a gasket (102 b) being provided between said seal box (102 a) and said stationary plate (101 a).

4. Soot blower according to claim 1 or 2, wherein the telescopic member (201) comprises a fixed sleeve (201 a), a sliding sleeve (201 b) and a driving oil cylinder (201 c), wherein the sliding sleeve (201 b) is slidably mounted in the fixed sleeve (201 a), an output end of the driving oil cylinder (201 c) is fixedly connected with the sliding sleeve (201 b), at least one sliding groove (201 a-1) is arranged on an inner wall of the fixed sleeve (201 a), a central axis of the sliding groove (201 a-1) is parallel to a central axis of the fixed sleeve (201 a), a sliding block (201 b-1) arranged on an outer wall of the sliding sleeve (201 b) corresponding to the sliding groove (201 a-1) is arranged, and the sliding block (201 b-1) is slidably connected with the sliding groove (201 a-1).

5. The soot blower according to claim 4, wherein the lance member (301) comprises a lance tube (301 a), a bearing (301 b) and a lance head (301 c), the lance head (301 c) is detachably disposed at an end of the lance tube (301 a) near the fixing member (101), a central axis of the lance tube (301 a) coincides with a central axis of the slipping sleeve (201 b), at least one bearing (301 b) is disposed, an inner ring of the bearing (301 b) is in interference fit with an outer wall of the lance tube (301 a), and an outer ring of the bearing (301 b) is in interference fit with an inner wall of the slipping sleeve (201 b).

6. The soot blower according to claim 5, wherein the nozzle (301 c) comprises a body (301 c-1), an inner cavity (301 c-2) is provided in the body (301 c-1), the inner cavity (301 c-2) penetrates through the bottom of the body (301 c-1) and forms an opening, the opening of the nozzle (301 c) is communicated with the interior of the nozzle (301 a), two nozzles (301 c-3) symmetrically provided with respect to the central axis of the body (301 c-1) are provided on the side wall of the body (301 c-1), the nozzles (301 c-3) are communicated with the inner cavity (301 c-2), the central axes of the two nozzles (301 c-3) coincide, and the central axes of the two nozzles (301 c-3) are perpendicular to the central axis of the inner cavity (301 c-2).

7. The sootblower of claim 6, wherein the top of said inner cavity (301 c-2) is circular arc shaped, a side top wall of said nozzle (301 c-3) away from the bottom of said body (301 c-1) is perpendicular to the central axis of said inner cavity (301 c-2), a side bottom wall of said nozzle (301 c-3) near the bottom of said body (301 c-1) is circular arc shaped protruding toward the bottom of said body (301 c-1), and a junction of a side bottom wall of said nozzle (301 c-3) near the bottom of said body (301 c-1) and the outer wall of said body (301 c-1) is provided with an arc-shaped transition portion (301 c-4).

8. The soot blower according to claim 7, wherein the driving member (302) comprises a driving motor (302 a), the driving motor (302 a) is fixed on the sliding sleeve (201 b), a driving sprocket (302 b) is arranged at the output end of the driving motor (302 a), a driven sprocket (302 c) is fixed on the outer ring of the nozzle (301 a), and the driving sprocket (302 b) is connected with the driven sprocket (302 c) through a chain (302 d).

9. The sootblower of claim 8 wherein said sootblower media switch (401) comprises a sootblower valve (401 a), said air switch (402) comprises an air valve (402 a), said sootblower valve (401 a) and air valve (402 a) each communicating with said lance tube (301 a) via a conduit.

10. A soot cleaning system comprising a soot blower according to any one of claims 1 to 9, and a control module (500) comprising a controller electrically connected to the telescopic member (201), the driving member (302) and the switch assembly (400);

-a time module (600), the time module (600) being electrically connected with the control module (500);

the controller controls the expansion and contraction of the expansion piece (201), the work of the driving piece (302) and the switch of the switch assembly (400).