CN114165799A

CN114165799A - Slip type boiler pulse soot blower

Info

Publication number: CN114165799A
Application number: CN202111514953.6A
Authority: CN
Inventors: 胡建廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-03-11

Abstract

The invention relates to a boiler soot blower, in particular to a slip type boiler pulse soot blower widely used on a power station boiler, which mainly comprises a pulse tank, a telescopic mechanism, a rotary mechanism, a blowout and explosion pipe and the like, wherein the pulse tank comprises a pulse tank body, a release valve and the like, the telescopic mechanism is used for pulling the blowout and explosion pipe to be close to or pulled out, the rotary mechanism is used for realizing the axial rotary motion of the blowout and explosion pipe, and the blowout and explosion pipe is used for guiding pressure gas in a pressure tank into an ash accumulation area to impact the ash accumulation so as to realize the soot blowing purpose.

Description

Slip type boiler pulse soot blower

Technical Field

The invention relates to a boiler soot blower, in particular to a slip-type boiler pulse soot blower which is largely used in the power production process of various power station boilers at all levels.

Background

The method is characterized in that the method is generally applied to Nanjing aviation academy in 7 months in 1992, is subject to academic subjects, is specially and automatically controlled, serves a certain scientific research unit in China, is engaged in power station boiler combustion optimization and energy-saving and environment-friendly technology transformation projects until now, has practical experiences of nearly thirty years, accumulates abundant practical experiences, deeply understands the working characteristics and the advantages and the disadvantages of relevant equipment in fuel combustion links such as coal and fuel oil in the power production process, and is intensively researched and developed by the inventor to develop a plurality of technical optimization products which are applied to the power production process in a large amount, so that the mass production cost is saved, and considerable economic benefits and environmental protection benefits are brought to users.

Regarding the soot blowing equipment, the soot blowing devices adopted by the existing boilers of thermal power plants (mainly relating to the positions of a hearth, a reheater, a superheater, an economizer, an air preheater and the like) mainly blow soot by steam, and the soot blowing medium is medium-pressure steam. The fact proves that: the steam blows the soot mode and often blows the boiler furnace pipe, causes the pipe explosion accident, seriously threatens production, and its leading cause is: the steam moisture content is high, and the soot blowing angle is inaccurate, still has an inherent defect that the soot blowing intensity and frequency can't dynamic adjustment, especially frequency, and this is the root cause that blows the soot and explodes the pipe. Another disadvantage is that: the steam production cost is very high, and the amount of one-time soot blowing is also very large, namely, an energy-saving space exists. Under the conditions that the primary energy price is high and the power production cost is increased sharply at present, technical substitution is necessary.

Disclosure of Invention

The invention aims to solve the technical problem of providing a more advanced slip type boiler pulse soot blower aiming at the technical current situation.

The technical scheme adopted by the invention for solving the technical problems is a slip-type boiler pulse soot blower, which comprises a pulse tank, a telescopic mechanism, a rotating mechanism, a blasting pipe and the like; the pulse tank comprises a pulse tank body, a release valve and the like; the telescopic mechanism is used for pushing the blast pipe to advance and withdraw; the rotating mechanism realizes axial rotating motion of the blasting pipe; the blasting pipe guides the pre-stored pressure gas in the pulse tank to the soot deposition area once to impact the soot at a high speed, so as to achieve the soot blowing purpose; wherein the pressure tank is connected with the blasting pipe through a discharge pipeline; wherein the telescopic mechanism is provided with a cylinder; wherein the rotating mechanism is provided with a driving motor; wherein the head of the blast pipe is provided with a directional nozzle.

Drawings

FIG. 1 is a front view of the pulse sootblower of the slip type boiler, and FIG. 2 is a left side view of the pulse sootblower of the slip type boiler.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings:

the structure of the present invention is described as follows:

referring to the attached

drawings

1 and 2, the slip-type boiler pulse soot blower mainly comprises a pulse tank, a telescopic mechanism, a rotary mechanism, a blasting pipe 7 and the like, wherein the middle part of the blasting pipe 7 is provided with a grid hole; the pulse tank comprises a pulse tank body 1, a release valve 13 and the like; the telescopic mechanism comprises a cylinder 9, a second bracket 12, a third bracket 10 and the like; the rotating mechanism comprises a driving motor 8 and a blasting pipe 7; the blasting pipe 7 is arranged in the sleeve 2 through a butt flange 6; wherein the sleeve 2 is a three-way pipe, the vertical inlet end of the three-way pipe is connected with the outlet of the release valve 13, and the outer ring of the three-way pipe is sleeved with a second bracket 12, and the second bracket 12 is used for fixing the tail end of the cylinder 9; the outlet end of the sleeve 2 is connected with a furnace wall connecting pipe 5; the furnace wall connecting pipe 5 is provided with a cooling air inlet 4; the outlet end of the spray explosion tube 7 is welded with a directional nozzle 3; one end of the third support 10 is connected with the air cylinder 9, and the other end is fixed with the driving motor 8; therefore, a rigid body is formed among the driving motor 8, the third support 10 and the blasting pipe 7, and when the air cylinder 9 stretches, the driving motor 8 and the blasting pipe 7 move forward and backward together.

The whole device is positioned to the outer surface of the furnace wall or the ash deposition surface through a bracket I11.

The working principle is as follows:

when the boiler is ready for a soot blowing operation, the aforementioned extension and retraction mechanism is first actuated to push the drive motor 8 and the squib 7 and the pointing nozzle 3 to a designated position.

The pressure tank 1 starts to intake air, when the rated pressure is reached, the release valve 13 is opened by a control program, the prestored pressure gas quickly enters the sleeve 2, then enters the blasting pipe 7 through the grid holes on the blasting pipe 7, then quickly moves forward to reach the directional nozzle 3, and is jetted to a certain area through the directional nozzle 3.

The method is characterized in that:

so-called pulse sootblowing: the release of the soot blowing gas is pulse type rather than continuous, which is different from steam type soot blowing, and the pressure of the soot blowing gas can be adjusted according to the field condition to adapt to various soot blowing radiuses;

so-called slip: the device is characterized in that the driving motor 8 drives the directional nozzle 3 to rotate in the circumferential direction by 360 degrees, the rotating speed of the directional nozzle 3 is controlled by a frequency converter, the key point is that a reasonable difference value exists between the rotating frequency of the directional nozzle 3 and the release frequency of the pulse tank, when the release frequency of the pulse tank is unchanged and the speed of the driving motor 8 is changed, the difference value is changed along with the change, the difference value is a slip difference, and therefore, regardless of the outlet taper of the directional nozzle 3, the coverage area can be guaranteed to be a sector shape when being swept each time and is larger than the natural diffusion angle of the directional nozzle 3, the size of the sector area is adjusted through the size of the slip difference value, over-blowing at a certain position can be prevented, and the service life of the furnace tube is prolonged.

After the primary purging operation is completed, the pressure tank release valve 13 is closed, the telescoping mechanism is started again, and the blowout/explosion pipe 7 and the like are returned to the original positions.

The benefits of this are:

the slip type boiler pulse soot blower comprises linear motion and rotary motion, and when a plurality of continuous areas need to be swept, the telescopic mechanism executing the linear motion can continue to feed longitudinally, so that the sweeping area is very wide, and the ash can be thoroughly cleaned without blind areas by the circumferential rotation of the directional nozzles 3 driven by the rotary motion.

Meanwhile, the blowing medium adopts low-gravity compressed air, so that violent washing caused by steam with water is thoroughly avoided, and the boiler cannot generate tube explosion accidents, so that the continuous and safe running of the unit is protected.

The telescopic mechanism described in the present embodiment is pneumatic, and is shown by the cylinder 9, and may be electric or chain type in practice.

The invention realizes the delicate integration of the light weight of the purging medium and the purging delivery mode.

Claims

1. A slip type boiler pulse soot blower comprises a pulse tank, a telescopic mechanism, a rotary mechanism, a blasting pipe and the like, and is characterized in that the pulse tank comprises a pulse tank body (1), a release valve (13) and the like; the telescopic mechanism comprises a cylinder (9), a second bracket (12), a third bracket (10) and the like; the rotating mechanism comprises a driving motor (8) and a blasting pipe (7).

2. The slip boiler pulse sootblower of claim 1, further characterized in that said blasting tube (7) is installed in the casing (2) by means of a docking flange (6); the sleeve (2) is a three-way pipe, the vertical inlet end of the three-way pipe is connected with the outlet of the release valve (13), and a second bracket (12) is sleeved on the three-way pipe.

3. The pulse sootblower of claim 1, wherein the outlet of said casing (2) is connected to the furnace wall connecting pipe (5); the furnace wall connecting pipe (5) is provided with a cooling air inlet (4).

4. The slip boiler pulse soot blower of claim 1, wherein the blasting tube (7) is provided with grid holes, and the output end of the blasting tube is connected with the directional nozzle (3).

5. The pulse sootblower of claim 1, wherein said entire device is positioned on the outer surface of the furnace wall or soot surface by a bracket (11).

6. The pulse sootblower of claim 1, wherein said extension mechanism includes but is not limited to a pneumatic mechanism.

7. A slip boiler pulse sootblower as claimed in claim 1 further characterised in that there is a difference between the output frequency of the pulse canister body (1) and the rotational frequency of the drive motor (8) and the difference is variable.