CN220061797U - Steam soot blower for bottom package wall of horizontal flue of boiler - Google Patents

Abstract

The utility model discloses a steam soot blower for a bottom wall of a horizontal flue of a boiler, which comprises a negative pressure wall box, a connecting pipe, a lifting valve and a soot blower shell, wherein the connecting pipe is connected to the middle part of the soot blower shell in a penetrating way; the soot blower shell is connected with a furnace wall fixing box through a bracket, the furnace wall fixing box is connected with a boiler, two rows of cyclone nozzles are arranged at the other end of the soot blower tube, and the two rows of cyclone nozzles are arranged in a staggered manner. According to the utility model, the ash blowing pipe is connected with the elbow, so that the area, close to the folded flame angle, of the horizontal flue of the boiler can be purged through the cyclone nozzle at the end part of the ash blowing pipe. And the cyclone nozzles are staggered in an upper layer and a lower layer, so that the effect that the cyclone nozzles can purge the furnace wall in all directions without dead angles is ensured.

Description

Steam soot blower for bottom package wall of horizontal flue of boiler

Technical Field

The utility model relates to the field of machinery, in particular to a boiler dust removal technology, and specifically relates to a steam soot blower for a bottom package wall of a horizontal flue of a boiler.

Background

The industrial heating furnace convection chamber, convection tube and industrial boiler tube ash deposit are cleaned, a superheated steam soot blower is adopted, the conduction of steam is controlled by taking a mechanical structure lifting valve of a variable speed rotary gear as a driving mechanism, and high-temperature and high-pressure superheated steam is sprayed into the convection chamber to realize soot blowing.

However, the horizontal flue of the boiler is close to the area of the folded flame horn, the ash accumulation condition is serious, the ash accumulation condition cannot be solved by adopting a conventional soot blower, the ash accumulation is difficult to clean, and the boiler efficiency is seriously affected after long-time operation.

Disclosure of Invention

The utility model provides a steam soot blower for a bottom wall of a horizontal flue of a boiler, which overcomes the defects of the prior art, and a bend is arranged at the end part of a connecting pipe to connect a soot blowing pipe with the bend, so that a swirl nozzle at the end part of the soot blowing pipe can purge the area, close to a folded flame angle, of the horizontal flue of the boiler. And the cyclone nozzles are arranged at the end part of the ash blowing pipe in a staggered manner according to the upper layer and the lower layer, so that the effect that the cyclone nozzles can purge the furnace wall in all directions without dead angles is ensured.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a be used for boiler horizontal flue end to wrap wall steam soot blower, includes negative pressure wall case, connecting pipe, poppet valve and soot blower casing, negative pressure wall case fixed mounting is in the side of soot blower casing, the connecting pipe cross-under is in the middle part of the soot blower casing, the one end of connecting pipe links to each other with the export of poppet valve through gland, the entry of poppet valve is linked together with the soot blowing air supply through gas pipeline, the other end of connecting pipe passes negative pressure wall case and is provided with the elbow, the elbow is connected with the one end of blowpipe through flange, be provided with the motor control assembly that is used for controlling the poppet valve to open or close on the soot blower casing;

the soot blower shell is connected with the furnace wall fixing box through the bracket, the furnace wall fixing box is connected with the boiler, the other end of the soot blowing pipe penetrates through the furnace wall fixing box and is provided with two rows of swirl nozzles along the axial direction, the swirl nozzles are located in the inner cavity of the boiler, the two rows of swirl nozzles are arranged in a staggered mode in the circumferential direction, and the nozzle ends of the swirl nozzles are obliquely arranged towards the furnace wall direction of the boiler.

Preferably, the motor control assembly comprises a driving motor, a rotating disc and a connecting rod, wherein the driving motor is fixedly arranged on a soot blower shell, the rotating disc is sleeved on the outer surface of the connecting pipe, gear teeth are arranged on the outer circumference of the rotating disc, a gear is fixedly arranged at the driving end of the driving motor and is in transmission connection with the gear teeth through a chain, a cam disc is fixedly arranged on one side, close to the poppet valve, of the rotating disc, one end of the connecting rod is movably matched with the cam disc through a cam, the other end of the connecting rod is hinged with a switch shaft of the poppet valve, and the middle of the connecting rod is rotationally connected with the soot blower shell through a rotating shaft.

Preferably, the gap between the furnace wall fixing box and the ash blowing pipe is filled with refractory clay.

Preferably, the number of the nozzles of each row of the cyclone nozzles is 10, and the 10 cyclone nozzles are uniformly and equally arranged on the outer side surface of the ash blowing pipe.

Preferably, the axial angle between the row of swirl nozzles close to the furnace wall and the lance tube is greater than the axial angle between the row of swirl nozzles remote from the furnace wall and the lance tube.

The utility model provides a steam soot blower for a bottom package wall of a horizontal flue of a boiler. The beneficial effects are as follows: the end of the connecting pipe is provided with the elbow, so that the ash blowing pipe is connected with the elbow, and the cyclone nozzle at the end of the ash blowing pipe can sweep the area, close to the folded flame angle, of the horizontal flue of the boiler. The cyclone nozzles are arranged at the end parts of the ash blowing pipe in a staggered manner according to the upper layer and the lower layer, so that the cyclone nozzles can fully cover the furnace wall by 360 degrees, the dead angle-free blowing effect is realized, and the furnace ash can be prevented from leaking in a static sealing manner between the ash blowing pipe and the furnace wall.

Drawings

In order to more clearly illustrate the utility model or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view showing the installation structure of a lance tube and a cyclone nozzle in the present utility model;

FIG. 4 is a schematic cross-sectional view at B-B in FIG. 3;

FIG. 5 is a schematic view of the purge range of the swirl nozzle of the present utility model;

the reference numerals in the figures illustrate:

1. a negative pressure wall box; 2. a connecting pipe; 3. a poppet valve; 4. a soot blower housing; 5. a lance tube; 6. a bracket; 7. a furnace wall fixing box; 8. a swirl nozzle; 9. a sealing gland; 10. an elbow; 11. a driving motor; 12. a rotating disc; 13. a connecting rod; 15. a gear; 16. refractory mortar; 17. a cam plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

1-5, a steam soot blower for a horizontal flue bottom package wall of a boiler comprises a negative pressure wall box 1, a connecting pipe 2, a lifting valve 3 and a soot blower shell 4, wherein the negative pressure wall box 1 is fixedly arranged on the side surface of the soot blower shell 4, the connecting pipe 2 is connected to the middle part of the soot blower shell 4 in a penetrating way, one end of the connecting pipe 2 is connected with an outlet of the lifting valve 3 through a sealing gland 9, an inlet of the lifting valve 3 is communicated with a soot blowing air source through an air pipeline, the other end of the connecting pipe 2 passes through the negative pressure wall box 1 and is provided with an elbow 10, the elbow 10 is connected with one end of the soot blower tube 5 through a connecting flange, and a motor control component for controlling the opening or closing of the lifting valve 3 is arranged on the soot blower shell 4;

the soot blower shell 4 is connected with a furnace wall fixing box 7 through a bracket 6, the furnace wall fixing box 7 is connected with a boiler, the other end of the soot blowing pipe 5 penetrates through the furnace wall fixing box 6 and is provided with two rows of swirl nozzles 8 along the axial direction, the swirl nozzles 8 are all positioned in the inner cavity of the boiler, the two rows of swirl nozzles 8 are mutually staggered in the circumferential direction, and the nozzle ends of the swirl nozzles 8 are obliquely arranged towards the furnace wall direction of the boiler.

Working principle:

when the device is used, the motor control assembly drives the switch shaft of the lifting valve 3 to be opened, so that soot blowing air flow can flow to the connecting pipe 2 through the lifting valve 3, then flow to the soot blowing pipe 5 through the elbow 10 at the end part of the connecting pipe 2, and then the cyclone nozzle 8 at the end part of the soot blowing pipe 5 sweeps the area, close to the folded flame angle, of the horizontal flue of the boiler. And the cyclone nozzles 8 are arranged at the end part of the ash blowing pipe 5 according to an upper layer and a lower layer, and the two rows of cyclone nozzles 8 are arranged in a staggered manner, so that the cyclone nozzles 8 can fully cover the furnace wall by 360 degrees, and the dead-angle-free purging effect is realized.

In this embodiment, considering the problem of the installation gap between the lance tube 5 and the furnace wall of the boiler, if the lance tube 5 rotates, the sealing effect is poor, so the design that the lance tube 5 is fixed is adopted, the furnace wall fixing box 7 is connected with the boiler by connecting the soot blower housing 4 with the furnace wall fixing box 7 through the bracket 6, and the lance tube 5 passes through the furnace wall fixing box 7 and is fixedly connected with the furnace wall fixing box 7, so that the sealing between the lance tube 5 and the furnace wall adopts static sealing, thereby ensuring no leakage of furnace ash. In addition, the soot blower shell 4 is connected with the furnace wall fixing box 7 through the bracket 6, and the furnace wall fixing box 7 is connected with the boiler into a whole, so that the expansion of the soot blower is ensured to be consistent with the expansion of the soot blower tube 5, and the operation faults of the soot blower caused by the expansion are reduced.

In the second embodiment, as a further preferable scheme of the first embodiment, the motor control assembly includes a driving motor 11, a rotating disc 12 and a connecting rod 13, the driving motor 11 is fixedly installed on the soot blower housing 4, the rotating disc 12 is sleeved on the outer surface of the connecting pipe 2, gear teeth are arranged on the outer circumference of the rotating disc 12, a gear 15 is fixedly installed at the driving end of the driving motor 11, the gear 15 is in transmission connection with the gear teeth through a chain, a cam disc 17 is fixedly installed at one side of the rotating disc 12, which is close to the poppet valve 3, one end of the connecting rod 13 is in movable fit with the cam disc 17 through a cam, the other end of the connecting rod 13 is hinged with a switch shaft of the poppet valve 3, a reset spring is sleeved at one end of the switch shaft, which extends out of the poppet valve 3, and the middle of the connecting rod 13 is in rotary connection with the soot blower housing 4 through a rotary shaft. When soot blowing is carried out, the rotating disc 12 is driven to rotate by the driving motor 11, so that the cam disc 17 on the side face of the rotating disc 12 is matched with the cam at one end of the connecting rod 13, the cam can be driven to move up and down in the vertical direction by the rotation of the cam disc 17, the other end of the connecting rod 13 is driven to move up and down, the switching shaft of the poppet valve 3 is driven to move axially, and the control effect of opening or closing the poppet valve 3 is achieved.

In the third embodiment, as a further preferable mode of the first embodiment, the gap between the furnace wall fixing box 7 and the lance tube 5 is filled with refractory mortar 16. The sealing effect between the furnace wall fixing box 7 and the lance tube 5 can be further ensured by the refractory mortar 16.

In the fourth embodiment, as a further preferable mode of the first embodiment, the number of the nozzles of each row of the swirl nozzles 8 is 10, and the 10 swirl nozzles 8 are uniformly and equally arranged on the outer side surface of the lance tube 5. The axial included angle alpha between the row of swirl nozzles 8 near the furnace wall and the lance tube 5 is larger than the axial included angle beta between the row of swirl nozzles 8 far away from the furnace wall and the lance tube 5. Through the nozzle quantity with every row swirl nozzle 8 all is provided with 10 to can further guarantee 360 full coverage effect to the oven, and through the setting that carries out adaptability to swirl nozzle 8's inclination, make the contained angle that sweeps be close the angle of repose of in-furnace deposition, thereby can guarantee basically that no dead angle sweeps.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (5)

1. The utility model provides a be used for boiler horizontal flue foundation to wrap wall steam soot blower which characterized in that: the device comprises a negative pressure wall box (1), a connecting pipe (2), a lifting valve (3) and a soot blower shell (4), wherein the negative pressure wall box (1) is fixedly arranged on the side face of the soot blower shell (4), the connecting pipe (2) is connected to the middle of the soot blower shell (4) in a penetrating way, one end of the connecting pipe (2) is connected with an outlet of the lifting valve (3) through a sealing gland (9), an inlet of the lifting valve (3) is communicated with a soot blowing air source through an air pipeline, the other end of the connecting pipe (2) penetrates through the negative pressure wall box (1) and is provided with an elbow (10), the elbow (10) is connected with one end of the soot blower shell (5) through a connecting flange, and a motor control assembly for controlling a switch shaft of the lifting valve (3) to be opened or closed is arranged on the soot blower shell (4);

the soot blower shell (4) is connected with a furnace wall fixing box (7) through a bracket (6), the furnace wall fixing box (7) is connected with a boiler, the other end of the soot blowing pipe (5) penetrates through the furnace wall fixing box (7) and is provided with two rows of cyclone nozzles (8) along the axial direction, the cyclone nozzles (8) are all located in an inner cavity of the boiler, the two rows of cyclone nozzles (8) are arranged in a mutually staggered mode in the circumferential direction, and a nozzle end of the cyclone nozzles (8) is obliquely arranged towards the furnace wall direction of the boiler.

2. A steam soot blower for a horizontal flue foundation wall of a boiler as defined in claim 1, wherein: the motor control assembly comprises a driving motor (11), a rotating disc (12) and a connecting rod (13), wherein the driving motor (11) is fixedly installed on a soot blower shell (4), the rotating disc (12) is sleeved on the outer surface of a connecting pipe (2), gear teeth are arranged on the outer circumference of the rotating disc (12), a gear (15) is fixedly installed at the driving end of the driving motor (11), the gear (15) is connected with a gear tooth through a chain in a transmission mode, a cam disc (17) is fixedly installed on one side, close to a lifting valve (3), of the rotating disc (12), one end of the connecting rod (13) is movably matched with the cam disc (17) through a cam, the other end of the connecting rod (13) is hinged to a switch shaft of the lifting valve (3), and the middle of the connecting rod (13) is rotatably connected with the soot blower shell (4) through a rotating shaft.

3. A steam soot blower for a horizontal flue foundation wall of a boiler as defined in claim 1, wherein: and a gap between the furnace wall fixing box (7) and the ash blowing pipe (5) is filled with refractory clay (16).

4. A steam soot blower for a horizontal flue foundation wall of a boiler as defined in claim 1, wherein: the number of the nozzles of each row of the cyclone nozzles (8) is 10, and the 10 cyclone nozzles (8) are uniformly and equidistantly arranged on the outer side surface of the ash blowing pipe (5).

5. A steam soot blower for a horizontal flue foundation wall of a boiler as set forth in claim 4 wherein: the axial included angle between a row of swirl nozzles (8) close to the furnace wall and the ash blowing pipe (5) is larger than the axial included angle between a row of swirl nozzles (8) far away from the furnace wall and the ash blowing pipe (5).