CN219828889U

CN219828889U - Soot blower for rotary air preheater

Info

Publication number: CN219828889U
Application number: CN202320570734.8U
Authority: CN
Inventors: 王桂林; 肖成伟; 刘代明; 焦伟伟; 陈万宾; 阙斯明; 张子文; 许紫豪; 高中立
Original assignee: Guizhou Xidian Power Co ltd Qianbei Power Plant
Current assignee: Guizhou Xidian Power Co ltd Qianbei Power Plant
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-10-13
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses a soot blower for a rotary air preheater, which comprises a plurality of module grids which are arranged in a circular array mode, wherein a plurality of heat accumulating elements are arranged in the module grids, the soot blower comprises a first jet gun barrel and a second jet gun barrel which are parallel to each other and are arranged above the air preheater, one side of the first jet gun barrel, facing the air preheater, is provided with a plurality of first nozzles, one side of the second jet gun barrel, facing the air preheater, is provided with a plurality of second nozzles, and the first nozzles and the second nozzles are arranged in a one-to-one correspondence; the first jet gun barrel and the second jet gun barrel are connected to the first end of the air inlet main pipe respectively, the second end of the air inlet main pipe is connected to an air source, the air inlet main pipe is further connected with a driving motor, and the first jet gun barrel and the second jet gun barrel are arranged on the upper surfaces of two adjacent modulus bins so that when the air preheater rotates, the first jet gun barrel and the second jet gun barrel sequentially perform soot blowing actions on heat accumulating elements in any two adjacent modulus bins.

Description

Soot blower for rotary air preheater

Technical Field

The utility model belongs to the technical field of coal-fired boilers, and particularly relates to a soot blower for a rotary air preheater.

Background

In order to reduce the exhaust temperature of the boilers of the thermal power plants, most of the boilers of the thermal power plants are provided with air pre-heaters, fig. 1 is a schematic structural diagram of the existing air pre-heaters, and as shown in fig. 1, a heat storage element 11 of the rotary air pre-heater 1 is composed of carbon steel plates pressed into special waveforms, and components with various specifications are manufactured according to the shape and the size of each small bin in a module bin 12 and are placed in the module bin 12. When the coal of the power plant boiler deviates from the design value, the ash content of the coal is increased, and meanwhile, as the ammonia injection of the denitration system escapes, the sticking probability of the ammonia bisulfate of the air preheater is increased, and the blocking possibility of the rotary air preheater is greatly increased.

In order to prevent the heat accumulation original of the air preheater from being blocked, the air preheater needs to blow ash, at present, the ash blower of the boiler design is a Shan Qiangguan ash blower, and the Shan Qiangguan ash blower cannot blow all accumulated ash in the aperture of the heat accumulation original in one air preheater rotation period when the air preheater is blocked to a certain extent. If all accumulated ash in the heat storage original is blown clean in a cycle period of the air preheater, the single-barrel soot blower is required to raise the soot blowing steam pressure of the air preheater, but the soot blowing steam pressure is raised to cause the blowing loss of the heat storage original. Therefore, when the air preheater is blocked to a certain extent, the Shan Qiangguan soot blower cannot completely blow off accumulated soot in the heat accumulating element of the air preheater, and the soot blowing effect is poor.

Disclosure of Invention

In view of the defects in the prior art, the utility model provides a soot blower for a rotary air preheater, which aims to solve the problem that a heat storage element of the conventional air preheater is easy to be blocked.

In order to solve the problems, the utility model provides a soot blower for a rotary air preheater, the air preheater comprises a plurality of module bins which are arranged in a circular array, a plurality of heat accumulation elements are arranged in the module bins, the soot blower comprises a first jet gun barrel and a second jet gun barrel which are mutually parallel and are arranged above the air preheater, a plurality of first nozzles are arranged on one side of the first jet gun barrel, which faces the air preheater, and a plurality of second nozzles are arranged on one side of the second jet gun barrel, which faces the air preheater, and the plurality of first nozzles and the plurality of second nozzles are arranged in a one-to-one correspondence manner; the first jet gun barrel and the second jet gun barrel are connected to the first end of the air inlet main pipe respectively, the second end of the air inlet main pipe is connected to an air source, the air inlet main pipe is further connected with a driving motor, and the driving motor is used for driving the air inlet main pipe to move in the horizontal direction.

The first jet gun barrel and the second jet gun barrel are arranged on the upper surfaces of two adjacent modulus bins, so that when the air preheater rotates, the first jet gun barrel and the second jet gun barrel sequentially perform soot blowing actions on heat accumulating elements in any two adjacent modulus bins.

Preferably, the soot blower further comprises a bracket, the air inlet main pipe and the driving motor are respectively installed on the bracket, and the height of the bracket is configured to enable the first air jet gun pipe and the second air jet gun pipe to be located above the air preheater.

Preferably, the soot blower further comprises an outer pipe sleeve, a sleeve is arranged outside the first end of the outer pipe sleeve, a connecting column is connected to the sleeve, a fixing rod is connected to the connecting column, the fixing rod is connected to the bracket, and the second end of the outer pipe sleeve is connected to the bracket; the air inlet main pipe penetrates through the outer pipe sleeve and is connected to the driving motor.

Preferably, the driving motor is provided with a driving shaft, the air inlet main pipe is connected to the driving shaft, a pipe sleeve is connected to the air inlet main pipe, a moving rod is connected to the pipe sleeve, one end of the moving rod is connected with a connecting piece, the connecting piece is connected to the driving shaft, and the driving shaft drives the moving rod to horizontally move when doing circumferential rotation movement, so that the air inlet main pipe is driven to horizontally move in the outer pipe sleeve.

The utility model provides a soot blower for a rotary air preheater, which comprises two jet barrels which are arranged in parallel, wherein nozzles on the two jet barrels are arranged in a one-to-one correspondence manner, the two jet barrels are arranged on the upper surfaces of two adjacent heat storage elements, and are configured to horizontally move on the upper surfaces of the heat storage elements; simultaneously, two jet gun barrels can make a round trip movement on the heat accumulation original paper, make the jet gun barrel can just be in the heat accumulation original paper that is closest to the axle center on the air preheater, sweep the deposition on the heat accumulation original paper of here clean, adopt foretell mode of sweeping, can sweep the deposition in the heat accumulation original paper clean in the cycle of an air preheater, reach ideal soot blowing effect.

Drawings

FIG. 1 is a schematic diagram of a structure of a conventional air preheater;

FIG. 2 is a schematic diagram of a sootblower provided by an embodiment of the present utility model;

fig. 3 is a schematic diagram of a connection structure between a driving motor and an air inlet main pipe according to an embodiment of the present utility model;

fig. 4 and 5 are schematic diagrams of arrangements of sootblowers provided by embodiments of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the utility model shown in the drawings and described in accordance with the drawings are merely exemplary and the utility model is not limited to these embodiments.

It should be noted here that, in order to avoid obscuring the present utility model due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details not greatly related to the present utility model are omitted.

Fig. 2 is a schematic structural view of a soot blower provided by an embodiment of the present utility model, and fig. 4 and 5 are schematic layout views of a soot blower provided by an embodiment of the present utility model, as shown in fig. 2, 4 and 5, the soot blower 2 includes a first jet barrel 21 and a second jet barrel 22 that are parallel to each other and are disposed above the air preheater 1, a plurality of first nozzles 210 are disposed on a side of the first jet barrel 21 facing the air preheater 1, a plurality of second nozzles 220 are disposed on a side of the second jet barrel 22 facing the air preheater 1, and the plurality of first nozzles 210 and the plurality of second nozzles 220 are disposed in a one-to-one correspondence; the first jet gun barrel 21 and the second jet gun barrel 22 are respectively connected to a first end of an air inlet main pipe 23, a second end of the air inlet main pipe 23 is connected to an air source, the air inlet main pipe 23 is further connected with a driving motor 24, and the driving motor 24 is used for driving the air inlet main pipe 23 to move in the horizontal direction.

Referring to fig. 2 and 4, the first air jet lance 21 and the second air jet lance 22 are disposed on the upper surfaces of two adjacent module compartments 12, so that when the air preheater 1 rotates, the first air jet lance 21 and the second air jet lance 22 sequentially perform soot blowing actions on the heat storage elements 11 in any two adjacent module compartments 12.

Referring to fig. 2 and 4, the first air jet barrel 21 and the second air jet barrel 22 are disposed above two adjacent module compartments 12 in parallel with each other, so that the first air jet barrel 21 and the second air jet barrel 22 can be disposed on the upper surfaces of two adjacent heat accumulating elements 11, and thus the openings of the plurality of first nozzles 210 and the plurality of second nozzles 220 are disposed toward the heat accumulating elements 11, and the air ejected from the nozzles sweeps the heat accumulating elements 11 from top to bottom.

As shown in fig. 4, in the rotating process that the heat storage original 11 rotates one circle in the direction indicated by the arrow a in fig. 4, when the heat storage original 11 with accumulated dust rotates to the position of the first air injection gun barrel 21, part of accumulated dust on the heat storage original 11 is blown off by the first air injection gun barrel 21, when the heat storage original 11 with blown off part of accumulated dust continues to rotate to the second air injection gun barrel 22, the second air injection gun barrel 22 blows off the remaining accumulated dust on the heat storage original 11, the heat storage original 11 is purged twice in a cycle period of one air preheater, and in the purging process, due to the one-to-one correspondence of the nozzles on the two air injection gun barrels, the same accumulated dust position on the heat storage original can be purged twice, so that the soot blowing effect is better than that of the existing single-gun soot blower.

Referring to fig. 2 and 5, the first air jet barrel 21 and the second air jet barrel 22 can move back and forth on the upper surface of the heat storage element 11, so that the first nozzle 210 on the first air jet barrel 21 and the second nozzle 220 on the second air jet barrel 22 are opposite to the heat storage element 11 closest to the axle center on the air preheater, so as to purge the heat storage element 11.

Specifically, in other embodiments, a plurality of first air injection barrels 21 and second air injection barrels 22 may be added according to the number of the heat storage elements 11 and the actual blocking situation, so as to achieve the purpose of completely purging the accumulated ash of the heat storage elements 11.

Specifically, as shown in fig. 2 and 4, the sootblower 2 further includes a bracket 25, the air inlet main pipe 23 and the driving motor 24 are respectively installed on the bracket 25, and the height of the bracket 25 is configured such that the first air injection lance pipe 21 and the second air injection lance pipe 22 are located above the air preheater 1.

Specifically, as shown in fig. 2, the soot blower 2 further includes an outer sleeve 26, a sleeve 261 is disposed on the first end of the outer sleeve 26, a connection post 262 is connected to the sleeve 261, a fixing rod 263 is connected to the connection post 262, the fixing rod 263 is connected to the bracket 25, and a second end of the outer sleeve 26 is connected to the bracket 25; the inlet main 23 is connected to the drive motor 24 through the inside of the outer jacket 26.

Specifically, one end of the fixing rod 263 is connected to the outer jacket 26, and the other end of the fixing rod 263 is connected to the bracket 25, so that the long outer jacket 26 can be fixed to the bracket 25.

The driving motor 24 is provided with a driving shaft 240, the air inlet main pipe 23 is connected to the driving shaft 240, and the air inlet main pipe 23 is driven to horizontally move by the rotation of the driving shaft 240.

More specifically, fig. 3 is a schematic diagram of a connection structure between a driving motor and an air inlet main pipe provided in an embodiment of the present utility model, and referring to fig. 2 and 3, a pipe sleeve 231 is connected to the air inlet main pipe 23, a moving rod 232 is connected to the pipe sleeve 231, one end of the moving rod 232 is connected to a connecting piece 233, the connecting piece 233 is connected to the driving shaft 240, and the driving shaft 240 drives the moving rod 232 to move horizontally when performing a circumferential rotation motion, so as to promote the air inlet main pipe 23 to move horizontally in the outer pipe sleeve 26.

In summary, the embodiment of the utility model provides a soot blower for a rotary air preheater, which is provided with two jet barrels and is arranged on the upper surfaces of two adjacent heat storage elements, along with the rotation of the air preheater, the heat storage elements can be purged twice in a cycle period of one air preheater, and the accumulated soot in the heat storage elements can be completely purged.

The foregoing is merely illustrative of the embodiments of this utility model and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the utility model, and it is intended to cover all modifications and variations as fall within the scope of the utility model.

Claims

1. The soot blower for the rotary air preheater is characterized in that the soot blower (2) comprises a first jet gun barrel (21) and a second jet gun barrel (22) which are mutually parallel and arranged above the air preheater (1), a plurality of first nozzles (210) are arranged on one side of the first jet gun barrel (21) facing the air preheater (1), a plurality of second nozzles (220) are arranged on one side of the second jet gun barrel (22) facing the air preheater (1), and the plurality of first nozzles (210) and the plurality of second nozzles (220) are arranged in a one-to-one correspondence manner; the first jet gun tube (21) and the second jet gun tube (22) are respectively connected to the first end of an air inlet main tube (23), the second end of the air inlet main tube (23) is connected to an air source, the air inlet main tube (23) is also connected with a driving motor (24), and the driving motor (24) is used for driving the air inlet main tube (23) to move in the horizontal direction;

the first air jet gun barrel (21) and the second air jet gun barrel (22) are arranged on the upper surfaces of two adjacent module grids (12), so that when the air preheater (1) rotates, the first air jet gun barrel (21) and the second air jet gun barrel (22) sequentially perform soot blowing actions on heat accumulating elements (11) in any two adjacent module grids (12).

2. Soot blower according to claim 1, wherein the soot blower (2) further comprises a bracket (25), the inlet header (23) and the drive motor (24) being mounted on the bracket (25), respectively, the bracket (25) being of a height configured to enable the first and second jet barrels (21, 22) to be located above the air preheater (1).

3. The sootblower of claim 2, wherein said sootblower (2) further comprises an outer sleeve (26), a sleeve (261) being provided externally of a first end of said outer sleeve (26), a connection post (262) being connected to said sleeve (261), a securing post (263) being connected to said connection post (262), said securing post (263) being connected to said bracket (25), a second end of said outer sleeve (26) being connected to said bracket (25); the air inlet main pipe (23) penetrates through the outer pipe sleeve (26) and is connected to the driving motor (24) internally.

4. A sootblower according to claim 3, wherein the driving motor (24) is provided with a driving shaft (240), the air inlet main pipe (23) is connected to the driving shaft (240), wherein the air inlet main pipe (23) is connected with a pipe sleeve (231), the pipe sleeve (231) is connected with a moving rod (232), one end of the moving rod (232) is connected with a connecting piece (233), the connecting piece (233) is connected to the driving shaft (240), and the driving shaft (240) drives the moving rod (232) to horizontally move when performing circumferential rotation movement, so that the air inlet main pipe (23) is driven to horizontally move in the outer pipe sleeve (26).