Air pre-heater soot blower capable of overhauling gun barrel on line

Abstract

The utility model relates to the technical field of soot blowers, and discloses an air pre-heater soot blower capable of overhauling a gun barrel on line, which is used for blowing away accumulated soot on a heat storage element of an air pre-heater and comprises a soot blowing steam supply mechanism, a conveying trolley mechanism and a soot blowing mechanism which are connected in sequence, and the air pre-heater is divided into an inner part and an outer part through an air pre-heater shell flue. The soot blowing mechanism is located on the inner side of an air pre-heater shell flue, the conveying trolley mechanism and the soot blowing steam providing mechanism are located on the outer side of the air pre-heater shell flue, an access hole is formed in the air pre-heater shell flue, and an access cover is detachably arranged at the access hole. The soot blowing mechanism comprises a soot blowing pipe, the soot blowing pipe comprises an upper gun barrel, a Z-shaped communicating gun barrel and a lower gun barrel which are sequentially connected, one end of the upper gun barrel is detachably connected with the lower gun barrel, and the connecting position is located at the manhole. The technical problem that in the prior art, a soot blowing gun barrel is inconvenient to overhaul and maintain can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of soot blowers, in particular to an air preheater soot blower with a gun barrel capable of online maintenance. Background Art

[0002] The rotary air preheater of a thermal power plant is a device that uses flue gas waste heat to heat the air. Its main function is to use a large number of heat storage elements installed in the rotary body of the air preheater to absorb the flue gas waste heat on the flue gas side and transfer it to the wind side to heat the primary and secondary air of the boiler. It can reduce the exhaust gas temperature, improve boiler efficiency, save fuel, and at the same time increase the air temperature and improve the combustion conditions. Due to the high ash content in the flue gas, steam soot blowers are installed at the cold and hot ends of the air preheater to prevent ash clogging the air preheater heat storage elements.

[0003] The current air preheater sootblower includes a sootblowing mechanism, a sootblowing steam supply mechanism, a conveying and running car mechanism and other components. The principle is to fix the sootblowing steam supply mechanism with the sootblowing mechanism, and the conveying and running car mechanism carries the sootblowing steam supply mechanism. The sootblowing mechanism passes through the air preheater shell flue and is located inside the air preheater. After the conveying and running car mechanism is powered on, it moves forward along the preset guide rail to drive the sootblowing mechanism to move. The sootblowing mechanism sprays steam flow to the heat storage element of the air preheater to blow away the accumulated soot. However, there are still some technical problems with this device: because the air preheater load-bearing H-beam is located above the conveying and running car mechanism (close to the direction of the air preheater heat storage element), the conveying and running car mechanism cannot drive the sootblowing mechanism from a position closer to the heat storage element, resulting in the steam injection point being far away from the heat storage element and the soot cleaning effect being poor.

[0004] To solve this problem, the prior art proposes an improved method (such as Figure 1 As shown in the figure, a connecting gun barrel and an upper gun barrel are added to the sootblowing mechanism, and the nozzle is moved to the upper gun barrel, so that the steam injection point of the sootblowing mechanism is closer to the heat storage element of the air preheater, so as to solve the problem that the steam injection point is far away from the heat storage element of the air preheater and the soot cleaning effect is not good. However, there are still areas that need improvement in practice: in this scheme, since a connecting gun barrel and an upper gun barrel are added to the sootblowing mechanism, the volume of the sootblowing mechanism is increased, and it is difficult to enter and exit from the original entrance and exit of the flue of the air preheater shell. It can only be fixed and preset inside the air preheater. This installation method makes the inspection and maintenance of the sootblowing mechanism very inconvenient. When the sootblowing mechanism fails, it is difficult to disassemble and troubleshoot in time, and even leads to serious problems such as aggravated blockage of the air preheater or damage to the heat storage element. Utility Model Content

[0005] The utility model aims to provide an air preheater soot blower with a gun barrel capable of online repair, so as to solve the technical problem of inconvenient repair and maintenance in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An air preheater sootblower with an online repairable gun barrel is used to blow away the accumulated soot on the air preheater heat storage element, comprising a sootblowing steam providing mechanism, a conveying running machine mechanism, and a sootblowing mechanism connected in sequence. The air preheater is divided into an inner and outer part by a flue of an air preheater shell. The sootblowing mechanism is located on the inner side of the flue of the air preheater shell, and the conveying running machine mechanism and the sootblowing steam providing mechanism are located on the outer side of the flue of the air preheater shell. An inspection hole is provided on the flue of the air preheater shell, and a removable inspection cover is provided at the inspection hole. The sootblowing mechanism comprises a sootblowing pipe, and the sootblowing pipe comprises an upper gun barrel, a Z-shaped connecting gun barrel, and a lower gun barrel connected in sequence. One end of the upper gun barrel is detachably connected to the lower gun barrel, and the connection position is located at the inspection hole.

[0008] The principle of this scheme is:

[0009] In actual application, the power is turned on, the motor drives the gear of the reduction box, and the reduction box drives the guide wheel to move right along the guide rail, driving the soot blowing mechanism to move to the right, and then the gas source switch is turned on. The steam moves along the path of the inner barrel, the lower barrel of the outer barrel, the Z-shaped connecting barrel, and the upper barrel, and is ejected from the nozzle to blow the air preheater heat storage element according to the set time and step. The conveying carriage mechanism continues to push the soot blowing mechanism to the right side of the air preheater shell flue. After reaching the limit position, the travel switch is activated, the carriage runs in reverse, and guides the barrel to retreat along a soot blowing trajectory different from that when it is forward. When the nozzle approaches the air preheater shell flue, the travel switch is activated, the steam inlet lift valve is closed, the soot blowing stops, and the conveying carriage mechanism continues to retreat to the starting position.

[0010] The advantages of this solution are:

[0011] 1. Convenient for disassembly and maintenance. The staff does not need to dismantle the entire device, but only needs to remove the upper barrel for inspection and maintenance.

[0012] 2. The device has a simple structure and is easy to modify. There is no need to replace the entire set of equipment. It can be achieved by only making certain modifications to the sootblowing mechanism on the original sootblower equipment.

[0013] Preferably, as an improvement, the inspection cover is in the shape of [. The inspection device is used to remove the upper barrel from the air preheater.

[0014] Preferably, as an improvement, the sootblowing steam providing mechanism comprises a steam inlet lift valve, an inner barrel, and an outer barrel, wherein the steam inlet lift valve is fixedly mounted at one end of the inner barrel, the other end of the inner barrel is slidably connected to the outer barrel, and the non-placed inner barrel end of the outer barrel is fixedly connected to the lower barrel. The sootblowing steam enters the lower barrel through the lift valve, the inner barrel, and the outer barrel, the inner barrel is slidably connected to the outer barrel, and the inner barrel can also provide a certain guiding effect for the outer barrel.

[0015] Preferably, as an improvement, the conveying running car mechanism includes a driving motor, a reduction box, a guide wheel, a guide rail, and a sootblower running car frame, the driving motor is connected to the reduction box, the reduction box is connected to the guide wheel, the guide wheel is rollingly connected to the guide rail, the reduction box, the guide wheel, the guide rail, and the driving motor are installed inside the sootblower running car frame, the guide rail is fixedly installed on the sootblower running car frame, the outer gun barrel is placed and the inner gun barrel end is fixedly connected to the reduction box, and the inner gun barrel is fixedly connected to the sootblower running car frame. The driving motor power supply is started, the driving motor drives the gear set in the reduction box, which then drives the guide wheel to rotate, the guide wheel rolls on the guide rail, drives the reduction box and the outer gun barrel connected to the reduction box to move, and the lower gun barrel connected to the outer gun barrel moves accordingly, and the entire sootblowing mechanism moves toward the inside of the air preheater under this driving mode.

[0016] Preferably, as an improvement, the soot blowing mechanism further comprises an upper bracket and a barrel bracket, wherein the upper bracket is a C-shaped structure with an opening facing upward, and the upper bracket is supported below the upper barrel, and there are two barrel brackets, and the two ends of the upper bracket are respectively fixedly connected to the two barrel brackets, and one end of the two barrel brackets not connected to the upper bracket is connected to the lower barrel. The upper bracket and the barrel bracket are supporting devices for the upper barrel, and their function is to fix the upper barrel, so that the upper barrel is not suspended, and the risk of the upper barrel falling is reduced.

[0017] Preferably, as an improvement, the soot blowing mechanism further comprises a connecting flange, and the upper gun barrel is connected to the lower gun barrel via the connecting flange. The upper gun barrel can be removed by disassembling the connecting flange, which is convenient and fast and easy to operate.

[0018] Preferably, as an improvement, it also includes a sealing cover, which is installed at the place where the outer barrel extends into the flue of the air preheater shell. The sealing cover is used to seal the opening where the outer barrel extends into the flue of the air preheater shell to prevent the ash in the flue from leaking out.

[0019] Preferably, as an improvement, the sootblowing device further comprises a plurality of supporting wheels, which are mounted on the lower side of the upper bracket. The supporting wheels are fixed inside the air preheater and are used to support the upper barrel and the upper bracket to reduce the risk of the upper barrel and the upper bracket falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art in the background technology;

[0021] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 3 for Figure 2 Schematic diagram of the removal of the central inspection cover;

[0023] Figure 4 for Figure 3Schematic diagram of the upper middle barrel being extracted. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: steam inlet lift valve 1, drive motor 2, reduction box 3, guide wheel 4, guide rail 5, inner barrel 6, soot blower sports car box frame 7, sealing cover 8, lower barrel 9, nozzle 10, supporting wheel 11, barrel bracket 12, upper barrel 13, Z-shaped connecting barrel 13-1, air preheater shell flue 14, air preheater load-bearing H-beam 15, air preheater heat storage element 16, upper bracket 17, connecting flange 18, inspection cover 19, inspection hole 19-1, connecting barrel 20.

[0026] The embodiment is basically as shown in the attached Figure 2 As shown:

[0027] An air preheater sootblower with an online repairable gun barrel is used to blow away the soot accumulated on the air preheater heat storage element 16, comprising a sootblowing steam providing mechanism, a conveying running car mechanism, and a sootblowing mechanism connected in sequence from left to right. The air preheater is divided into an inner and outer part by an air preheater shell flue 14. The sootblowing mechanism is located on the inner side of the air preheater shell flue 14, and the conveying running car mechanism and the sootblowing steam providing mechanism are located on the outer side of the air preheater shell flue 14. The sootblowing steam providing mechanism comprises a steam inlet lift valve 1, an inner gun barrel 6, and an outer gun barrel. The steam inlet lift valve 1 is fixedly mounted on the left end of the inner gun barrel 6, the right end of the inner gun barrel 6 is placed in the outer gun barrel and is slidably connected to the outer gun barrel, and the right end of the outer gun barrel is fixedly connected to a lower gun barrel 9. When the conveying running car mechanism drives the outer gun barrel to move, the inner gun barrel 6 provides a certain guiding effect for the outer gun barrel, and at the same time, the telescopic action between the outer gun barrel and the inner gun barrel 6 provides a moving distance for the sootblowing mechanism to move forward and backward.

[0028] The conveying sports car mechanism includes a driving motor 2, a reduction box 3, a guide wheel 4, a guide rail 5, and a sootblower sports car frame 7. The driving motor 2 is connected to the reduction box 3, the reduction box 3 is connected to the guide wheel 4, the guide wheel 4 is rollingly connected to the guide rail 5, the guide wheel 4 is a gear set structure, and the guide rail 5 is a rack structure. The sports car mechanism is continuously moved forward by the continuous engagement between the gear set and the rack. The reduction box 3, the guide wheel 4, the guide rail 5, and the driving motor 2 are installed inside the sootblower sports car frame 7, the guide rail 5 is fixedly installed on the sootblower sports car frame 7, the steam inlet lift valve 1 is fixedly connected in the sootblower sports car frame 7, the sootblower sports car frame 7 is fixedly installed below the air preheater load-bearing H beam 15, the left end of the outer barrel is fixedly connected to the reduction box 3, and the conveying sports car mechanism drives the outer barrel to move together when it moves.

[0029] The sootblowing mechanism includes a sootblowing pipe, five nozzles 10, an upper bracket 17, two barrel supports 12, a connecting flange 18, and two supporting wheels 11. The sootblowing pipe includes an upper barrel 13, a lower barrel 9, and a Z-shaped connecting barrel 13-1. The upper barrel 13 is located above the lower barrel 9. Several nozzles 10 are arranged on the outer side of the upper barrel 13, opposite to the air preheater heat storage element 16. The left end of the upper barrel 13 is fixedly connected to the Z-shaped connecting barrel 13-1 through a connecting flange 18. The Z-shaped connecting barrel 13-1 is welded to the lower barrel 9, and the connecting flange 18 is arranged on the vertical pipe of the Z-shaped connecting barrel. The upper bracket 17 is a C-shaped structure with an opening facing upward, supported below the upper gun barrel 13, and used to reduce the hanging weight of the upper gun barrel 13 itself. The two ends of the upper bracket 17 are respectively fixedly connected to the two gun barrel brackets 12, and the lower ends of the two gun barrels are connected to the lower gun barrel 9. The connection between the two gun barrel brackets 12 and the lower gun barrel 9 is also connected to a diagonal brace rod, which is used to enhance the stability of the connection between the gun barrel brackets 12 and the lower gun barrel 9. In addition, two supporting wheels 11 are installed on the lower side of the upper bracket 17, and the supporting wheels 11 are fixedly connected to the outer shell of the air preheater, and are used to support the upper bracket 17, and further reduce the hanging weight of the upper gun barrel 13 itself.

[0030] It also includes a maintenance device, which includes an inspection hole 19-1 and an inspection cover 19. The inspection hole 19-1 is opened on the flue 14 of the air preheater shell, and the opening position corresponds to the Z-shaped connecting barrel. The inspection cover 19 has a [-shaped shape and can be detachably installed on the inspection hole 19-1. The opening of the inspection cover 19 is opposite to the protruding side of the Z-shaped connecting barrel.

[0031] It also includes a sealing cover 8, which is installed at the place where the outer gun barrel extends into the air preheater shell flue 14 and is located on the left side of the air preheater shell flue 14.

[0032] When in use, the power is turned on, the motor drives the gear of the reduction box 3, and the reduction box 3 drives the guide wheel 4 to move right along the guide rail 5, driving the soot blowing mechanism to move right, and then the steam inlet lift valve 1 is opened, the gas source is connected, and the steam moves along the path of the inner barrel 6, the lower barrel 9 of the outer barrel, the Z-shaped connecting barrel, and the upper barrel 13, and is ejected from the nozzle 10 to purge the air preheater heat storage element 16 according to the set time and step. The conveying carriage mechanism continuously pushes the soot blowing mechanism to the right side of the air preheater shell flue 14. After reaching the limit position, the travel switch is activated, the carriage reverses, and guides the barrel to retreat with a soot blowing trajectory different from that when advancing. When the nozzle 10 approaches the air preheater shell flue 14, the travel switch is activated, the steam inlet lift valve 1 is closed, the soot blowing stops, and the conveying carriage mechanism continues to retreat to the starting position.

[0033] When maintenance is required, such as Figure 3 As shown, the inspection cover 19 is removed to expose the Z-shaped connecting gun barrel to the outside, as shown in FIG. Figure 4As shown, the connecting flange 18 is removed and the upper barrel 13 is pulled out of the flue, and the upper barrel 13 can be inspected and maintained. After troubleshooting, the workpiece is reinstalled in the reverse order mentioned above. After the test run of the equipment is normal, the inspection cover 19 can be reinstalled.

[0034] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An air preheater sootblower with an online repairable gun barrel, used for blowing away the accumulated soot on the heat storage element of the air preheater, comprising a sootblowing steam supply mechanism, a conveying and running mechanism, and a sootblowing mechanism connected in sequence, the air preheater is divided into an inner and outer part by the air preheater shell flue, the sootblowing mechanism is located on the inner side of the air preheater shell flue, the conveying and running mechanism and the sootblowing steam supply mechanism are located on the outer side of the air preheater shell flue, characterized in that: An inspection hole is provided on the flue of the air preheater shell, and a detachable inspection cover is provided at the inspection hole. The soot blowing mechanism includes a soot blowing pipe, which includes an upper gun barrel, a Z-shaped connecting gun barrel, and a lower gun barrel connected in sequence. One end of the upper gun barrel is detachably connected to the lower gun barrel, and the connection position is located at the inspection hole.

2. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 1, characterized in that: The inspection cover has a [-shaped appearance.

3. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 2, characterized in that: The sootblowing steam providing mechanism includes a steam inlet lift valve, an inner gun barrel, and an outer gun barrel. The steam inlet lift valve is fixedly installed at one end of the inner gun barrel, the other end of the inner gun barrel is slidably connected to the outer gun barrel, and the non-connected inner gun barrel end of the outer gun barrel is fixedly connected to the lower gun barrel.

4. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 3, characterized in that: The conveying carriage mechanism includes a driving motor, a reduction box, a guide wheel, a guide rail, and a sootblower carriage frame. The driving motor is connected to the reduction box, the reduction box is connected to the guide wheel, the guide wheel is rollingly connected to the guide rail, the reduction box, the guide wheel, the guide rail, and the driving motor are installed inside the sootblower carriage frame, the guide rail is fixedly installed on the sootblower carriage frame, the outer gun barrel is placed and the inner gun barrel end is fixedly connected to the reduction box, and the inner gun barrel is fixedly connected to the sootblower carriage frame.

5. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 4, characterized in that: The sootblowing mechanism also includes an upper bracket and a barrel bracket. The upper bracket is a C-shaped structure with an opening upward. The upper bracket is supported under the upper barrel. There are two barrel brackets. Both ends of the upper bracket are fixedly connected to the two barrel brackets respectively, and one end of the two barrel brackets not connected to the upper bracket is connected to the lower barrel.

6. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 5, characterized in that: The sootblowing mechanism also includes a connecting flange, and the upper gun barrel is connected to the lower gun barrel via the connecting flange.

7. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 6, characterized in that: It also includes a sealing cover, which is installed at the place where the outer gun barrel extends into the flue of the air preheater shell.

8. The air preheater sootblower capable of online maintenance of the gun barrel according to claim 7, characterized in that: The sootblowing mechanism further comprises a plurality of supporting wheels, and the plurality of supporting wheels are installed on the lower side of the upper bracket.

Images