CN208312412U - Soot blower for boiler hearth - Google Patents
Soot blower for boiler hearth Download PDFInfo
- Publication number
- CN208312412U CN208312412U CN201820517245.5U CN201820517245U CN208312412U CN 208312412 U CN208312412 U CN 208312412U CN 201820517245 U CN201820517245 U CN 201820517245U CN 208312412 U CN208312412 U CN 208312412U
- Authority
- CN
- China
- Prior art keywords
- valve
- soot blower
- helix tube
- limit switch
- half tooth
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of soot blower for boiler hearth, including rack, spray head, half tooth helix tube, stuffing box, front limit switch, rear limit switch, motor, gear reduction box, terminal board, wall case, valve-opening mechanism and soot blower valve, soot blower valve, motor, gear reduction box are respectively fixed on the machine frame, motor is connect by gear reduction box with sprocket wheel, sprocket wheel is connect with the spigot nut of half tooth helix tube by chain, it is set with inner tube in half tooth helix tube, is cased with stuffing box outside the smooth bar part of half tooth helix tube；Front limit switch, rear limit switch and motor are respectively connected to terminal board, for controlling reciprocating motion and the purging rotary motion of half tooth helix tube；Soot blower valve includes valve rod, and the movement of valve-opening mechanism driving stem opens or closes soot blower valve.The utility model can drive 360 ° of spray head rotations by moving radially for helix tube, can increase the compressed air area coverage that nozzle ejects, protect furnace wall cooling to a greater degree.
Description
Technical field
The utility model relates to boiler of power plant technical fields, more specifically, are related to a kind of soot blower for boiler hearth.
Background technique
China has carried out more stringent thermal power plant's pollutant emission standard, the newly-built coal-burning power plant of key area at this stage
The discharge standard of NOx is reduced to 50mg/Nm3, and coal unit has generally carried out low NO transformation, 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 rate of fast high temperature corrosion, there are corrosion rates when dust stratification to be up to 2.0-2.5mm/a.When water-cooling wall pipeline is because of corrosion thinning to one
It when determining degree, will result in " booster " accident, seriously affect the economic benefit and safe operation of power plant.
In recent years it has been proposed that the measure of many pre- high temperature corrosion resistances, but it is ineffective, there is following aspects to ask
Topic: adherent wind is added in aperture at water-cooling wall, and inleakage is big, seriously affects the normal combustion inside burner hearth, leads to excess air system
Number rises, and NOx discharge increases；Inhibit to corrode by the way of the wind of side, air quantity dynamic pressure is relatively low, can not effectively change adherent place
Atmosphere constituent；Furthermore control can not realize intelligent automaticization, need operations staff oneself to judge and adjust high temperature corrosion to prevent
Locking system increases power plant's employee work amount and is easy to appear human error.
Utility model content
In view of the above problems, the purpose of the utility model is to provide a kind of soot blower for boiler hearth, to solve above-mentioned background technique
Pointed problem.
Soot blower for boiler hearth provided by the utility model, comprising: rack, spray head, half tooth helix tube, stuffing box, front limit are opened
Pass, rear limit switch, motor, gear reduction box, terminal board, wall case, valve-opening mechanism and soot blower valve, wherein the tail of rack
End has fixed plate, and soot blower valve is fixed in fixed plate, and motor, gear reduction box are respectively fixed on the machine frame；Envelope wall
Case passes through furnace wall, and spray head stretches out envelope wall case and enters furnace wall or be contracted in envelope wall case, and spray head is mounted on half tooth helix tube
Thread head is opened up on spray head there are two opposite Venturi nozzle, is set with inner tube in half tooth helix tube, and the one of inner tube
End is connected to spray head, and the other end is fixed in fixed plate, is cased with stuffing box outside the smooth bar part of half tooth helix tube；Motor passes through
Gear reduction box is connect with sprocket wheel, and sprocket wheel is connect with the spigot nut of half tooth helix tube by chain；Front limit switch and rear limit
Bit switch is separately mounted in rack, and is located at the both ends of half tooth helix tube, and front limit switch and rear limit switch pass through electricity
Source line accesses terminal board, and motor accesses terminal board also by power supply line；Soot blower valve includes valve rod, valve-opening mechanism driving stem
Movement, opens or closes soot blower valve.
Furthermore it is preferred that structure be that soot blower valve further includes valve body, flap and filler seat, filler seat is mounted on valve body
Interior, the bottom end of filler seat has a through-hole, and through-hole is stretched out in the bottom end of valve rod, and is fixedly connected with flap, on the top of valve rod
It is arranged with spring capping；Follower is installed on the top of filler seat, stuffing nut is installed on follower, in stuffing nut
Spring is installed between spring capping.
Additionally, it is preferred that structure be that valve-opening mechanism includes cam disc and lever, cam disc is sleeved on stuffing box, lever
One end be located on the motion profile of cam disc, the other end of lever and the top of valve rod are hinged.
Furthermore it is preferred that structure be that air valve is installed on valve body.
Additionally, it is preferred that structure be to be lined with gasket between filler seat and valve body.
Furthermore preferred structure is, baffle is pasted in the one side that spring capping is contacted with spring.
Using the soot blower for boiler hearth of above-mentioned the utility model, following technical effect can be obtained:
(1) the utility model does not increase water-cooling wall aperture, does not add extras, since furnace heating surface soot blowing is interval
Operation carries out blast injection in soot blowing gap, forms stable, high-intensitive oxidizing atmosphere in water cooling wall surface, subtract
Slow high temperature corrosion rate, protects furnace wall cooling, equipment is simple, low in cost；
(2) moving radially for helix tube can drive 360 ° of spray head rotations, can increase the compressed air that nozzle ejects
Area coverage protects furnace wall cooling to a greater degree；
(3) when high temperature corrosion is not serious, spray head is movable in wall case, to protect nozzle from high-temperature flue gas
Wash away abrasion；
(4) soot blower for boiler hearth is controlled by automatic control system, is not necessarily to any participation of power plant operations staff, is reduced work
Amount, realizes Intelligent Prevention water wall high temperature corrosion；
(5) air valve installed on soot blower valve can prevent blowing medium in flue gas intrusion soot blower for boiler hearth from flowing through
Part.
Detailed description of the invention
By reference to the explanation below in conjunction with attached drawing, and with the utility model is more fully understood, this is practical new
The other purposes and result of type will be more clearly understood and understood.In the accompanying drawings:
Fig. 1 is the overall structure diagram according to the soot blower for boiler hearth of the utility model embodiment；
Fig. 2 is the structural schematic diagram according to the soot blower valve of the utility model embodiment；
Fig. 3 is the process schematic according to the valve-opening mechanism of the utility model embodiment.
Appended drawing reference therein includes: rack 1, fixed plate 1-1, spray head 2, Venturi nozzle 2-1, half tooth helix tube 3, fills out
Magazine 4, front limit switch 5, rear limit switch 6, motor 7, gear reduction box 8, terminal board 9, envelope wall case 10, cam disc 11-
1, lever 11-2, soot blower valve 12, valve rod 12-1, valve body 12-2, flap 12-3, filler seat 12-4, spring capping 12-5, gear
Piece 12-5-1, follower 12-6, stuffing nut 12-7, spring 12-8, gasket 12-9, inner tube 13, air valve 14.
Specific embodiment
In the following description, for purposes of illustration, it in order to provide the comprehensive understanding to one or more embodiments, explains
Many details are stated.It may be evident, however, that these embodiments can also be realized without these specific details.
In other examples, one or more embodiments for ease of description, well known structure and equipment are shown in block form an.
Fig. 1-Fig. 3 shows the overall structure of the soot blower for boiler hearth according to the utility model embodiment, soot blower valve
The structure of structure and valve-opening mechanism.
Fig. 3 simplifies the structure of soot blower valve to highlight the relationship between valve-opening mechanism and soot blower valve.
As Fig. 1-Fig. 3 jointly shown in, soot blower for boiler hearth provided by the embodiment of the utility model include: rack 1, spray head 2, text
Nozzle 2-1, half tooth helix tube 3, stuffing box 4, front limit switch 5, rear limit switch 6, motor 7, gear reduction box 8, end in mound
Sub- box 9, envelope wall case 10, valve-opening mechanism and soot blower valve 12, wherein the tail end of rack 1 has fixed plate 1-1, soot blower
Valve 12 is fixed on fixed plate 1-1, and motor 7, gear reduction box 8 are separately fixed in rack 1；Envelope wall case 10 passes through burner hearth
Furnace wall,
Spray head 2 is telescopic to be mounted in envelope wall case 10, i.e., spray head 2 stretches out envelope wall case 10 and enters burner hearth or be contracted in
In envelope wall case 10, the position that envelope wall case 10 is used to enter for spray head 2 burner hearth provides sealing, and spray head 2 is mounted on half tooth spiral
The thread head of pipe 3, opens up on spray head 2 there are two opposite Venturi nozzle 2-1, and Venturi nozzle 2-1 can tiltedly blow wall
Formula heating surface, when soot blower deactivates, spray head 2 is protected in envelope wall case 10.
Inner tube 13 is set in half tooth helix tube 3, one end of inner tube 13 is connected to spray head 2, and the other end of inner tube 13 is solid
It is scheduled on fixed plate 1-1, stuffing box 4 is cased with outside the smooth bar part of half tooth helix tube 3, stuffing box 4 is for closing half tooth spiral
Annular space between pipe 3 and inner tube 13, avoids blowing medium from leaking.
Motor 7 is connect by gear reduction box 8 with sprocket wheel, and the spigot nut of sprocket wheel and half tooth helix tube 3 is connected by chain
It connects, is driven by motor 7 with movable sprocket, rotates spigot nut, so that half tooth helix tube 3 be forced to generate axial movement.
Front limit switch 5 and rear limit switch 6 are separately mounted in rack 1, and front limit switch 5 is located at half tooth helix tube
3 front end, rear limit switch 6 are located at the rear end of half tooth helix tube 3, and front limit switch 5 and rear limit switch 6 pass through power supply line
Terminal board 9 is accessed, motor 7 accesses terminal board 9 also by power supply line；Front limit switch 5 and rear limit switch 6 are for controlling half tooth
The reciprocating motion of helix tube 3 and purging rotary motion.
Soot blower valve 12 includes valve rod 12-1, valve body 12-2, flap 12-3, filler seat 12-4, spring capping 12-5, fills out
Material lid 12-6, stuffing nut 12-7 and spring 12-8, filler seat 12-4 is mounted in valve body 12-2, in filler seat 12-4 and valve body
It is lined with gasket 12-9 between 12-1, the bottom end of filler seat 12-4 has a through-hole, and through-hole is stretched out in the bottom end of valve rod 12-1, and with
Flap 12-3 is fixedly connected, and follower 12-6 is mounted on the top of filler seat 12-4, and stuffing nut 12-7 is mounted on follower 12-
On 6, spring capping 12-5 is set in the top of valve rod, spring 12-8 be mounted on stuffing nut 12-7 and spring capping 12-5 it
Between, when valve rod 12-1 stress moves down, flap 12-3 is driven to move down, opens the through-hole of the bottom end filler seat 12-4, i.e.,
Soot blower valve 12 is opened, at this point, spring 12-8 compression accumulation of energy, when spring capping 12-5 and stuffing nut 12-7 are contacted, valve
Valve 12-3 can not continue to move down, when valve rod 12-1 no longer by downward pressure when, spring 12-8, which is released, to rebound, band ovable valve stem
12-1 is moved up, and when flap 12-3 covers the through-hole of the bottom end filler seat 12-4, closes soot blower valve 12.
Baffle 12-5-1, baffle 12-5-1 and spring are pasted in the one side that spring capping 12-5 is contacted with spring 12-8
12-8 contact is played the role of preventing abrasion spring capping 12-5.
Corrosive fume invades spray head 2 in order to prevent, air valve 14 is equipped on valve body 12-1, air valve 14 is in burner hearth
Soot blower is opened when deactivating, thus cleaned air enters in soot blower for boiler hearth, once soot blower for boiler hearth valve is opened, into valve body
Air valve 14 is closed in the pressure effect of the blowing medium of 12-1.
If the flue gas pressures of soot blower for boiler hearth installation site are not achieved defined negative pressure, air valve 14 can connect sealing with
Ventilating air pipeline, in this way, the part that flows through of blowing medium in flue gas intrusion soot blower for boiler hearth can be prevented, such as spray head 2, interior
Pipe 13 and soot blower valve 12.
Valve-opening mechanism includes cam disc 11-1 and lever 11-2, and cam disc 11-1 is sleeved on stuffing box 4, lever 11-2's
One end is located on the motion profile of cam disc 11-1, and the top of the other end and valve rod 12-1 of lever 11-2 is hinged, works as cam disc
When 11-1 drives lever 11-2 to swing, lever 11-2 band ovable valve stem 12-1 is moved up and down.
Soot blower valve 12 is opened by the rotary motion of half tooth helix tube 3, and cam disc 11-1 is mounted on stuffing box 4,
After half tooth helix tube, 3 forward stroke, cam disc 11-1 starts to control valve rod 12-1, when purging beginning, under lever 11-2
Pressure valve valve 12-3 opens soot blower valve 12, and finishing in purging is, cam disc 11-1 trip lever 11-2 again closes soot blowing
Device valve 12.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described with power
Subject to the protection scope that benefit requires.
Claims (6)
1. a kind of soot blower for boiler hearth characterized by comprising rack, spray head, half tooth helix tube, stuffing box, front limit switch,
Rear limit switch, motor, gear reduction box, terminal board, wall case, valve-opening mechanism and soot blower valve, wherein
The tail end of the rack has fixed plate, and the soot blower valve is fixed in the fixed plate, the motor, the tooth
Wheel reduction gearbox is separately fixed in the rack；
Envelope wall case passes through furnace wall, and the spray head stretches out the envelope wall case and enters the furnace wall or be contracted in the envelope wall case
Interior, the spray head is mounted on the thread head of the half tooth helix tube, is opened up on the spray head there are two opposite venturi
Nozzle is set with inner tube in the half tooth helix tube, and one end of said inner tube is connected to the spray head, and the other end is fixed on institute
It states in fixed plate, is cased with stuffing box outside the smooth bar part of the half tooth helix tube；
The motor is connect by the gear reduction box with sprocket wheel, and the spigot nut of the sprocket wheel and the half tooth helix tube is logical
Cross chain connection；
The front limit switch and the rear limit switch are separately mounted in the rack, and are located at the half tooth helix tube
Both ends, the front limit switch and the rear limit switch pass through power supply line and access the terminal board, the motor also by
Power supply line accesses the terminal board；
The soot blower valve includes valve rod, and the valve-opening mechanism drives the stem movement, opens or closes the soot blower
Valve.
2. soot blower for boiler hearth as described in claim 1, which is characterized in that the soot blower valve further include valve body, flap and
Filler seat, the filler seat are mounted in the valve body, and the bottom end of the filler seat has a through-hole, the bottom end of the valve rod
The through-hole is stretched out, and is fixedly connected with the flap, is arranged with spring capping on the top of the valve rod；In the filler seat
Top follower is installed, stuffing nut is installed on the follower, in the stuffing nut and the spring capping
Between spring is installed.
3. soot blower for boiler hearth as claimed in claim 2, which is characterized in that the valve-opening mechanism includes cam disc and lever, institute
It states cam disc to be sleeved on the stuffing box, one end of the lever is located on the motion profile of the cam disc, the lever
The other end and the valve rod top it is hinged.
4. soot blower for boiler hearth as claimed in claim 2, which is characterized in that be equipped with air valve on the valve body.
5. soot blower for boiler hearth as claimed in claim 2, which is characterized in that be lined between the filler seat and the valve body
Piece.
6. soot blower for boiler hearth as claimed in claim 2, which is characterized in that one contacted in the spring capping with the spring
Baffle is pasted on face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820517245.5U CN208312412U (en) | 2018-04-12 | 2018-04-12 | Soot blower for boiler hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820517245.5U CN208312412U (en) | 2018-04-12 | 2018-04-12 | Soot blower for boiler hearth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208312412U true CN208312412U (en) | 2019-01-01 |
Family
ID=64719634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820517245.5U Expired - Fee Related CN208312412U (en) | 2018-04-12 | 2018-04-12 | Soot blower for boiler hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208312412U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2018
- 2018-04-12 CN CN201820517245.5U patent/CN208312412U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 Termination date: 20200412 |