CN106940021A - A kind of sootblower arrangement - Google Patents
A kind of sootblower arrangement Download PDFInfo
- Publication number
- CN106940021A CN106940021A CN201710316707.7A CN201710316707A CN106940021A CN 106940021 A CN106940021 A CN 106940021A CN 201710316707 A CN201710316707 A CN 201710316707A CN 106940021 A CN106940021 A CN 106940021A
- Authority
- CN
- China
- Prior art keywords
- soot blower
- valve
- shower nozzle
- wall
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
- F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/001—Ash removal, handling and treatment means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
It can alleviate the sootblower arrangement of water wall high temperature corrosion the invention discloses a kind of, it is simple in construction, cost economy, stable, the effect of protection furnace wall cooling can be functioned well as.The present invention includes soot blower system and automatic control system, and wherein soot blower system includes bushing type shower nozzle, Venturi nozzle, helix tube, soot blower valve, air valve.Shower nozzle outer tube is connected with the compressed air attracted from secondary air box, and compressed air is used as adherent wind medium；Inner tube is connected with the high-temperature high-pressure steam attracted from reheater entrance header, and vapor is used as sootblowing dielectric.Soot blower valve and air valve are alternately opened so that be blown into compressed air to burner hearth by nozzle in soot blowing gap, so as to form adherent wind diaphragm at water-cooling wall, play a part of protecting water-cooling wall pipeline.
Description
Technical field
The present invention relates to a kind of sootblower arrangement, and in particular to a kind of soot blower dress that can alleviate water wall high temperature corrosion
Put, belong to power boiler burning technical field.
Background technology
China has carried out more strict thermal power plant's pollutant emission standard, the newly-built coal-burning power plant of key area at this stage
NOx discharge standard is reduced to 50mg/Nm3, coal unit generally carried out low NO transformation, and this has resulted in burner hearth water
Anoxycausis at cold wall, forms strong reducing property atmosphere.Pyrite in coal is easily converted into corrosivity pole in combustion
Strong hydrogen sulfide gas, and because water-cooling wall pipeline wall surface temperature is higher, greatly accelerate the process of high temperature corrosion.By to water
The situation of cooling wall high-temperature corrosion is studied it can be found that pipeline weakened region is often dust stratification critical regions again, and dust stratification will add
The speed of fast high temperature corrosion, corrosion rate up to 2.0-2.5mm/a when there is dust stratification.When water-cooling wall pipeline is because of corrosion thinning to one
" booster " accident when determining degree, is will result in, economic benefit and the safe operation of power plant is had a strong impact on.
In recent years it has been proposed that the measure of many pre- high temperature corrosion resistances, but effect is not good, there is asking following aspects
Topic：Adherent wind is set up in perforate at water-cooling wall, and inleakage is big, has a strong impact on the normal combustion inside burner hearth, causes excess air system
Number rises, NOx discharge increase；Suppress corrosion by the way of the wind of side, air quantity dynamic pressure is relatively low, it is impossible to effectively change adherent place
Atmosphere constituent；This outer control can not realize intelligent automaticization, it is necessary to operations staff oneself judge and adjust high temperature corrosion prevent
Locking system, increases power plant's employee work amount and human error easily occurs.
The content of the invention
Goal of the invention：For above-mentioned deficiency of the prior art, the present invention provides a kind of sootblower arrangement, can alleviate water
Cooling wall high-temperature corrosion, simple in construction, good airproof performance is easy to operate, and system can in real time be adjusted according to the combustion conditions of burner hearth
Section, realizes the dual purpose of intelligent soot blowing and preventing and treating high temperature corrosion.
Technical scheme：In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of sootblower arrangement, it is characterised in that：Including：Bushing type shower nozzle, helix tube, soot blower valve, air valve, wall case,
Soot blower drive device and automatic control system,
Shower nozzle includes inner and outer tubes, and inner tube is set in outer tube；The inner tube of bushing type shower nozzle is connected with vapor, and realization is periodically blown
The purpose of ash；Outer tube is connected with compressed air, realizes the purpose for blowing adherent wind for a long time；Inner tube passes through pipeline and soot blower valve phase
Connect, then connect with reheater import header, outer tube is connected by pipeline with air valve, then is connected with secondary air bellow；Soot blower
The flow of Valve controlling blowing medium vapor, air valve controls the flow of blowing medium compressed air；
Shower nozzle is by the telescopic wall case installed in burner hearth of helix tube, and shower nozzle moving freely vertically is driven by soot blower
Device realizes that soot blower drive device includes motor, gear reduction box, sprocket wheel and chain；Motor by gear reduction box with
Sprocket wheel is connected, and the spigot nut of sprocket wheel and helix tube is connected by chain, and sprocket wheel rotates spigot nut, so as to force spiral
Pipe produces axial movement, drives purge position during shower nozzle different operating modes of arrival, and 360 ° of purgings of shower nozzle are realized during work；
Automatic control system will be according to boiler operating state, by adjusting air valve, the folding degree of soot blower valve and electricity
Machine rotating speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
Preferably, described sootblower arrangement, it is characterised in that：Also include frame, sootblower arrangement passes through machine
Frame is fixed in boiler side walls, and frame is made up of slotted-angle shelving, and bracket is welded with front panel, and soot blower is fixed on pot by bracket
On stove.
Further, described sootblower arrangement, it is characterised in that：The motor and gear reduction box are placed in frame
Face, when soot blower system is stopped transport, shower nozzle and helix tube are recovered in wall case and frame, when soot blower system works, shower nozzle and helix tube
It extend into burner hearth.
Preferably, described sootblower arrangement, it is characterised in that：The air valve passes through flange and pipeline phase
Connect, the valve element of air valve is the valve of a Mechanical course, supply blowing medium-compression of different flow to shower nozzle on request
Air.
Preferably, described sootblower arrangement, it is characterised in that：The soot blower valve is used to control purging to be situated between
The flow velocity of matter, including the valve seat and control panel that can be revolved；The valve seat that can be revolved uses flat seal, behind valve seat, airflow direction
It is upper to also have a control panel for adjusting pressure, the water vapour pressure in pipeline is down to blowing required by soot blower using control panel
Sweep pressure.Vapor used by soot blowing comes from the pumping of reheater entrance header, and the operating pressure of vapor promotion is 0.8-
1.5MPa, operating temperature is less than 350 DEG C.
Preferably, described sootblower arrangement, it is characterised in that：Two are further opened with the top of the shower nozzle relatively
Venturi nozzle, for the water wall surface on oblique blown converter bore wall face.
Further, the adherent wind flow control of the venturi nozzle outlet is in 5-15m/s, to there is enough momentum
Flue gas layer at nearly wall is penetrated, a layer of air diaphragm is formed；The adherent air quantity entered from soot blower in burner hearth accounts for Secondary Air
The 0.5-2% of total amount.
Preferably, the wall case provides sealing for the position that shower nozzle enters burner hearth, and soot blower is bolted to
On the panel of wall case.
Preferably, described sootblower arrangement, it is characterised in that：Maintenance people is offered on described frame side wall
Hole.
Beneficial effect：The sootblower arrangement that the present invention is provided, with advantages below：
（1）The present invention does not increase water-cooling wall perforate, does not set up extras, because furnace heating surface soot blowing is intermittently operated,
Soot blowing gap is compressed air injection, forms stable, high intensity oxidizing atmosphere in water-cooled wall surface, slows down high temperature rotten
Speed is lost, furnace wall cooling is protected, equipment is simple, with low cost.
（2）The movement of helix tube axis can drive the rotation of 360 ° of shower nozzle, can increase the compressed air that nozzle ejects and cover
Capping is accumulated, and furnace wall cooling is protected to a greater degree.
（3）When high temperature corrosion is not serious, shower nozzle is movable in wall case, so as to protect nozzle from high-temperature flue gas
Wash away abrasion.
（4）The anticorrosive dual-purpose system of soot blowing of the present invention, air-tightness is good, and control accuracy is high, and totally adherent air quantity is small for burner hearth,
Influence will not be produced on flame combustion.
（5）The system, without any participation of power plant operations staff, reduces workload by automatic control system control, real
Intelligent Prevention water wall high temperature corrosion is showed.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
In figure：Shower nozzle 1, inner tube 2, outer tube 3, pipeline 4, pipeline 5, soot blower valve 6, air valve 7, motor 8, gear reduction box 9,
Sprocket wheel 10, chain 11, helix tube 12, frame 13, automatic control system 14, Venturi nozzle 15, water-cooling wall 16, wall case 17, inspection
Manhole 18 is repaiied, B is compressed air, and C is vapor.
Embodiment
The present invention is further described with reference to specific embodiment.
As shown in figure 1, can alleviate the sootblower arrangement of water wall high temperature corrosion for the present invention is a kind of, the system includes set
Tube type blow head 1, Venturi nozzle 15, helix tube 12, soot blower valve 6, air valve 7, motor 8, gear reduction box 9, sprocket wheel 10,
Chain 11, wall case 17, frame 13, inspection manhole 18, automatic control system 14.Shower nozzle 1 is installed by the way that helix tube 12 is telescopic
On wall case 17, Venturi nozzle 15 is housed on shower nozzle 1；
Wherein, shower nozzle 1 includes inner tube 2, outer tube 3, and inner tube 2 is set in outer tube 3；It is high that the inner tube 2 of bushing type shower nozzle is connected with high temperature
Vapor is pressed, the purpose of selective sootblowing is realized；Outer tube 3 is connected with compressed air, realizes the purpose for blowing adherent wind for a long time；Inner tube 2 is led to
Piping 4 connects with soot blower valve 6, then connects with reheater import header, and outer tube 3 is connected by pipeline 5 with air valve 7,
Connect again with secondary air bellow；Soot blower valve 6 controls the flow of blowing medium vapor, the control blowing medium pressure of air valve 7
The flow of contracting air.Shower nozzle 1 vertically move freely by soot blower drive device to realize, drive device is by motor 8, gear
Reduction box 9 and sprocket wheel 10 and chain 11 are constituted；Motor 8 is connected by gear reduction box 9 with sprocket wheel 10, sprocket wheel 10 and helix tube
12 spigot nut is connected by chain 11, and sprocket wheel 10 rotates spigot nut, so that force helix tube 12 to produce axial movement,
Purge position during shower nozzle different operating modes of arrival is driven, 360 ° of purgings of shower nozzle can be realized during work, helix tube pace reaches
To 400-500mm/min.Whole purging system is fixed by frame 13, frame 13 is made up of slotted-angle shelving, welded on front panel
There is bracket, soot blower is fixed on boiler by bracket；Motor 8 and gear reduction box 9 are placed in above frame 13, and soot blower system is stopped
During fortune, shower nozzle 1 and helix tube 12 are recovered to machine frame inside, and when soot blower system works, shower nozzle and helix tube are extend into burner hearth.
Automatic control system 14 will be according to boiler operating state, by the folding degree for adjusting air valve, soot blower valve
And motor speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
Inspection manhole 18 is offered on the side wall of frame 13, is easy to the turnover manually overhauled.
Described air valve 7 is connected by flange with pipeline, and the valve element of air valve is the valve of a Mechanical course, can be with
Blowing medium --- the compressed air of different flow is supplied to nozzle on request.
Described soot blower valve 6 can control the flow velocity of blowing medium, and the valve seat that can be revolved uses flat seal, in valve seat
Behind, there is the control panel of a regulation pressure on airflow direction, drop the water vapour pressure in pipeline using this control panel
To the purging pressure required by soot blower.Vapor used by soot blowing comes from the pumping of reheater entrance header, and vapor is pushed away
The operating pressure of Jie is 0.8-1.5MPa, and operating temperature is less than 350 DEG C.
Shower nozzle 1 is manufactured by oxida-tion-resistant steel, and two relative Venturi nozzles 15 are further opened with the top of shower nozzle, can
With the heating surface of water-cooling wall 16 on oblique blown converter bore wall face.The adherent wind flow control that Venturi nozzle 15 is exported in 5-15m/s, with
Just there are enough momentum to penetrate flue gas layer at nearly wall, form a layer of air diaphragm；Entered from soot blower adherent in burner hearth
Air quantity accounts for the 0.5-2% of Secondary Air total amount.When soot blower is disabled, shower nozzle 1 is retracted into frame 13 and protected.
Wall case 17 provides sealing for the position that shower nozzle 1 enters burner hearth, and soot blower is bolted on the panel of wall case 17；
Because inner flue gas of the stove is negative pressure all the time, therefore shower nozzle has enough air to enter in stove with the annular space at furnace wall, stove in short-term
Interior flue gas malleation, appended pipe joint can provide seal gas to wall case, if burner hearth flue gas is malleation all the time, should use
Special malleation wall case.
This soot blower for boiler hearth can not only clean furnace wall cooling surface, and can play protection water in soot blowing gap
Cold wall exempts from the effect of corrosive gas erosion, efficiently avoid high temperature corrosion, and its core parts is one and venturi is housed
The bushing type shower nozzle of nozzle.When needing soot blowing, motor drives drive device, and helix tube rotates forward so that shower nozzle, which is reached, to be referred to
Determine soot blowing position, now soot blower valve is opened, air valve is closed, soot blower is removed contamination operating mode into soot blowing, can be entered on request
Row one is enclosed or multi-turn purging.At the end of soot blowing, you can immediately enter and blow adherent wind operating mode, now soot blower valves are closed, empty
Air valve is opened, and shower nozzle is by the 360 ° of rotations of required purging angle, and compressed air is in a steady stream constantly by Venturi nozzle along stove
Thorax inwall is parallel to be sprayed, you can the adherent wind diaphragm spread to surrounding Uniform Flow is formed in water-cooling wall wall, so as to ensure
Oxidizing atmosphere is presented around water-cooling wall, it is to avoid high-temperature corrosion in boiler.When high temperature corrosion is not serious, air valve is closed,
The supply of adherent wind is cut off, while shower nozzle is retracted to the initial position in wall case, can effectively protect nozzle from coal dust
Airflow scouring.
In boiler running process, when in blow adherent wind operating mode when, open air valve, extract one out from boiler flue collector
Part Secondary Air is into soot blower, and these Secondary Airs are close to the parallel ejection of water-cooling wall side wall inwall by Venturi nozzle.Control
The jet of nozzle exit is between 5-15m/s, preferably between 9-10m/s.Meanwhile, control adherent wind total amount to account for and enter pot
The 0.5-2% of stove burner hearth total blast volume, preferably below 1%.Adherent wind diaphragm, effective guarantee water can be formed at water-cooling wall
Cold wall pipe safety.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of sootblower arrangement, it is characterised in that：Including：Bushing type shower nozzle, helix tube, soot blower valve, air valve, wall
Case, soot blower drive device and automatic control system,
Shower nozzle includes inner and outer tubes, and inner tube is set in outer tube；The inner tube of bushing type shower nozzle is connected with vapor, and realization is periodically blown
The purpose of ash；Outer tube is connected with compressed air, realizes the purpose for blowing adherent wind for a long time；Inner tube passes through pipeline and soot blower valve phase
Connect, then connect with reheater import header, outer tube is connected by pipeline with air valve, then is connected with secondary air bellow；Soot blower
The flow of Valve controlling blowing medium vapor, air valve controls the flow of blowing medium compressed air；
Shower nozzle is by the telescopic wall case installed in burner hearth of helix tube, and shower nozzle moving freely vertically is driven by soot blower
Device realizes that soot blower drive device includes motor, gear reduction box, sprocket wheel and chain；Motor by gear reduction box with
Sprocket wheel is connected, and the spigot nut of sprocket wheel and helix tube is connected by chain, and sprocket wheel rotates spigot nut, so as to force spiral
Pipe produces axial movement, drives purge position during shower nozzle different operating modes of arrival, and 360 ° of purgings of shower nozzle are realized during work；
Automatic control system will be according to boiler operating state, by adjusting air valve, the folding degree of soot blower valve and electricity
Machine rotating speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
2. sootblower arrangement according to claim 1, it is characterised in that：Also include frame, sootblower arrangement passes through frame
It is fixed in boiler side walls, frame is made up of slotted-angle shelving, bracket is welded with front panel, soot blower is fixed on boiler by bracket
On.
3. sootblower arrangement according to claim 2, it is characterised in that：The motor and gear reduction box are placed in frame
Face, when soot blower system is stopped transport, shower nozzle and helix tube are recovered in wall case and frame, when soot blower system works, shower nozzle and helix tube
It extend into burner hearth.
4. sootblower arrangement according to claim 1, it is characterised in that：The air valve is connected by flange with pipeline,
The valve element of air valve is the valve of a Mechanical course, supplies the blowing medium of different flow to shower nozzle on request.
5. sootblower arrangement according to claim 1, it is characterised in that：The soot blower valve is used to control blowing medium
Flow velocity, including the valve seat and control panel that can be revolved；The valve seat that can be revolved uses flat seal, behind valve seat, on airflow direction
The control panel of also one regulation pressure, makes the water vapour pressure in pipeline be down to the purging required by soot blower using control panel
Pressure.
6. sootblower arrangement according to claim 1, it is characterised in that：Be further opened with the top of the shower nozzle two it is relative
Venturi nozzle, for the water wall surface on oblique blown converter bore wall face.
7. sootblower arrangement according to claim 6, it is characterised in that：The adherent distinguished and admirable speed of the venturi nozzle outlet
Control, to there is enough momentum to penetrate flue gas layer at nearly wall, forms a layer of air diaphragm in 5-15m/s；Enter from soot blower
The adherent air quantity entered into burner hearth accounts for the 0.5-2% of Secondary Air total amount.
8. sootblower arrangement according to claim 1, it is characterised in that：The wall case is that the position of shower nozzle into burner hearth is carried
For sealing, soot blower is bolted on the panel of wall case.
9. sootblower arrangement according to claim 1, it is characterised in that：Maintenance people is offered on described frame side wall
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316707.7A CN106940021A (en) | 2017-05-08 | 2017-05-08 | A kind of sootblower arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316707.7A CN106940021A (en) | 2017-05-08 | 2017-05-08 | A kind of sootblower arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106940021A true CN106940021A (en) | 2017-07-11 |
Family
ID=59463340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710316707.7A Pending CN106940021A (en) | 2017-05-08 | 2017-05-08 | A kind of sootblower arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106940021A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931249A (en) * | 2017-12-22 | 2018-04-20 | 内蒙古欧晶科技股份有限公司 | Electrode automatic flushing device is melted in a kind of silica crucible |
| CN108426258A (en) * | 2018-04-12 | 2018-08-21 | 吉林省光大节能技术有限责任公司 | Soot blower for boiler hearth |
| CN108662599A (en) * | 2018-05-23 | 2018-10-16 | 浙江浙能技术研究院有限公司 | A kind of application method of the soot blower and soot blower of carrying vapour jet stream auxiliary |
| CN111076200A (en) * | 2019-11-25 | 2020-04-28 | 内蒙古大唐国际托克托发电有限责任公司 | Boiler hearth soot blowing device and soot blowing method thereof |
| CN111905566A (en) * | 2020-07-16 | 2020-11-10 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN112503553A (en) * | 2020-12-10 | 2021-03-16 | 国家能源集团泰州发电有限公司 | Soot blower for reducing high-temperature corrosion of water-cooled wall and working method thereof |
| CN113375177A (en) * | 2021-05-28 | 2021-09-10 | 国能神皖池州发电有限责任公司 | Boiler and sealing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931249A (en) * | 2017-12-22 | 2018-04-20 | 内蒙古欧晶科技股份有限公司 | Electrode automatic flushing device is melted in a kind of silica crucible |
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| CN108662599A (en) * | 2018-05-23 | 2018-10-16 | 浙江浙能技术研究院有限公司 | A kind of application method of the soot blower and soot blower of carrying vapour jet stream auxiliary |
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| CN111076200B (en) * | 2019-11-25 | 2024-03-19 | 内蒙古大唐国际托克托发电有限责任公司 | Soot blower of boiler hearth and soot blowing method thereof |
| CN111905566A (en) * | 2020-07-16 | 2020-11-10 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN111905566B (en) * | 2020-07-16 | 2022-03-22 | 无锡东方船研高性能船艇工程有限公司 | Soot blowing device and soot blowing method for marine SCR reactor |
| CN112503553A (en) * | 2020-12-10 | 2021-03-16 | 国家能源集团泰州发电有限公司 | Soot blower for reducing high-temperature corrosion of water-cooled wall and working method thereof |
| CN113375177A (en) * | 2021-05-28 | 2021-09-10 | 国能神皖池州发电有限责任公司 | Boiler and sealing method |
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