CN108488779A - One kind being used for station boiler high-temperature heating surface oxidized skin remove device and sweep-out method - Google Patents
One kind being used for station boiler high-temperature heating surface oxidized skin remove device and sweep-out method Download PDFInfo
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- CN108488779A CN108488779A CN201810260227.8A CN201810260227A CN108488779A CN 108488779 A CN108488779 A CN 108488779A CN 201810260227 A CN201810260227 A CN 201810260227A CN 108488779 A CN108488779 A CN 108488779A
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- CN
- China
- Prior art keywords
- oxide skin
- ontology
- remover
- scale descaler
- descaler
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/52—Washing-out devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Abstract
The present invention relates to one kind being used for station boiler high-temperature heating surface oxidized skin remove device and sweep-out method.The present invention includes the import header being sequentially communicated along Working fluid flow direction, inlet pipeline, scale descaler, preceding elbow, elbow afterwards, outlet conduit and outlet header, scale descaler tilts installation, scale descaler includes oxide skin discharge section, channel separation plate, oxide skin discharge control door and scale descaler ontology, the inside of scale descaler ontology is cavity structure, oxide skin discharge section is connected to scale descaler ontology, oxide skin discharge control door is mounted in oxide skin discharge section, channel separation plate is mounted in scale descaler ontology, scale descaler ontology is divided into remover intake channel and remover exit passageway by channel separation plate, remover intake channel is connected to remover exit passageway, remover intake channel is connected to inlet pipeline, remover exit passageway is connected to preceding elbow.It is discharged conducive to oxide skin, avoids blocking.
Description
Technical field
The present invention relates to one kind being used for station boiler high-temperature heating surface oxidized skin remove device and sweep-out method, especially one
Kind is super for power station（It is super）The remove device and sweep-out method of criticality benchmark high-temperature heating surface oxidized skin.
Background technology
Power station is super（It is super）The stripping of criticality benchmark boiler high temperature boiler tube inner wall oxide skin is fallen behind in caused by elbow bottom deposit
Overtemperature or even overheat booster problem are to perplex one of the main problem of its safe and economical operation in recent years.In high-temperature surface
The oxide scale layer of wall falls off, and accumulates in U-shaped curved bottom, reduces the passage section of pipeline, increases the circulating resistance of steam, pipe
Steam flow is opposite in son reduces, and seriously reduces the cooling effect to pipe, causes high temperature superheater and reheater tube is short
Phase overheats booster.The whole nation fortune super critical boiler repeatedly occur due to oxide scale layer fall off cause boiler heating surface block and it is short
Phase overheats booster.
It is a natural process that high-temperature steam inside pipe wall, which generates oxidation film, and oxidation film is formed quickly when beginning, once film shape
Just slow down at rear oxidation rate.When overtemperature or temperature, pressure big ups and downs, not due to pipe base material and oxidation film
Same thermal expansion ability, the oxidation film of metal surface will produce crackle, and the presence of crackle makes parent metal be directly exposed to oxygen
Among changing environment, the process of oxidation is accelerated, oxide layer is also begun to double-deck, multilayer development.With prolonging for unit operation time
Long, the thickness of oxidation film increases, and during the frequent starting of boiler, blowing out or lifting load, tube temperature amplitude of variation is very
Greatly, different with the thermal expansion ability of oxidation film due to base material, matrix can generate the effect drawn or pressed to the oxidation film on surface, these
Effect can all cause oxidation film to crack.
The U-shaped curved bottom oxide skin of high-temperature surface is built up more at present, and individual pipe internal oxidition leather blocks are nucleated shape, can not
It is handled with the method for pressure-air or steam-line blowing, and chemically handles the damage that can cause boiler tubes.Therefore, can only
Use the method for pipe cutting mechanical chipping.Cut off it is U-shaped it is curved after, with copper rod tap vertical tube, so that the oxide skin loosened is poured out.
After U-shaped curved internal cleaning, lead to ball inspection with whole ball method 100%, butt welding again after complete liquidation.This method heavy workload,
Maintenance is time-consuming more, there is the problems such as welding quality again.
It has been subjected in overtemperature caused by elbow bottom deposit or even overheat booster after how solving the problems, such as scale spallation
The attention and thinking of many people are arrived.
In order to solve this problem, there are mainly two types of modes for technology traditional at present：First, upgrading high temperature superheater and again
The material of hot device selects the material of high temperature oxidation resisting, but upgrades material and bring expensive cost；Second is that optimization unit is normally transported
Row adjustment, it is stringent to control lifting load rate, it avoids desuperheating water from putting into too early, reduces the generating rate of oxide skin and fall off
Speed, but the life of oxide skin can be aggravated caused by the frequent start-stop of unit and responsive electricity grid peak regulation situations such as load rapid fluctuations
At rate and the speed to fall off, and the challenge of bigger is brought to the accurate operation of operations staff.
In view of this, a kind of descaling device is disclosed in the patent document application No. is 2014200499212,
Oxide skin clearance technique field；There is provided it is a kind of it is at low cost, take up little area, a kind of descaling device of small investment；A kind of removing
Oxide skin device, including rack, roller, motor, roller, supporting rack, cylinder, roller are coupled by belt with motor, and motor is solid
Be scheduled on supporting rack, the both ends of cylinder couple with supporting rack and rack respectively, and there are two the rollers, one be wire brush, one
A to be oriented to brush, guiding brush surface is fluted, and the wire brush is hairbrush.It is halfway to there is removing in above-mentioned comparison patent
Defect.
Invention content
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and provide a kind of reasonable in design
For station boiler high-temperature heating surface oxidized skin remove device and sweep-out method.
Technical solution is used by the present invention solves the above problems：It is clear that this is used for station boiler high-temperature heating surface oxidized skin
Include the import header being sequentially communicated along Working fluid flow direction, inlet pipeline, scale descaler, preceding elbow, rear curved except device
Head, outlet conduit and outlet header, the scale descaler tilt installation, and design feature is：The oxide skin is removed
Device includes that oxide skin discharge section, channel separation plate, oxide skin discharge control door and scale descaler ontology, the oxide skin are clear
Except the inside of device ontology is cavity structure, the oxide skin discharge section is connected to scale descaler ontology, the oxide skin row
Go out to control door in oxide skin discharge section, the channel separation plate is mounted in scale descaler ontology, the channel
Scale descaler ontology is divided into remover intake channel and remover exit passageway by isolation board, and the remover import is logical
Road is connected to remover exit passageway, and the remover intake channel is connected to inlet pipeline, the remover exit passageway with
The shape of preceding elbow connection, the oxide skin discharge section is cone, and the shape of the scale descaler ontology is cylinder,
The shape of the cross section of the channel separation plate is stairstepping.Step-like channel separation plate is steamed along the import of scale descaler
Steam flow is conducive to the discharge of oxide skin, oxide skin is avoided to block to continuously decreasing；The oxide skin discharge section of cone is conducive to oxide skin
Control door discharge smoothly is discharged from oxide skin.
Further, successively along the flow area of Working fluid flow direction remover intake channel and remover exit passageway
Increase.Oxide skin zone of illuviation is avoided to carry out clogging；It restrains outmost turns plumber's mass flow dynamic pressure and is more than inner ring, outer ring can be overcome
The drawback that pipe flow resistance brings greatly flow velocity small.
Further, the material of the channel separation plate is the metal of heat resistant and wear resistant damage.
Further, the quantity of the inlet pipeline, preceding elbow, rear elbow and outlet conduit is equal, and is multiple, institute
State the cross-sectional area of multiple inlet pipelines summation be less than scale descaler ontology cross-sectional area half.
Further, the angle between the scale descaler and horizontal plane is 30 °~60 °, the oxide skin row
Go out section to be diagonally downward arranged.
Further, the outer surface of the scale descaler ontology is provided with heat-barrier material or spraying insulating moulding coating.
Further, the side of elbow before the scale descaler is arranged close to.Remove the production of inlet pipeline inner surface
Raw oxide skin, elbow before avoiding oxide skin from blocking.
Further, the sweep-out method for station boiler high-temperature heating surface oxidized skin remove device, feature
It is：The sweep-out method includes the following steps：
The first step：Oxide skin and working medium in inlet pipeline enter in scale descaler ontology simultaneously.
Second step：The intrinsic oxide skin of scale descaler enters oxide skin by remover intake channel and section is discharged
It is interior, while the working medium in inlet pipeline enters remover exit passageway.
Third walks：Control door discharge is discharged by oxide skin in oxide skin, and working medium is flowed out by preceding elbow.
Compared with prior art, the present invention has the following advantages：
1）The scale descaler innovatively uses stepped passageway isolation board, Working fluid flow channel is divided into two, two
Oxide skin is collected using angle of inclination in a channel centre position, avoids oxide skin caused by preceding elbow bottom deposit
Overtemperature or even overheat booster problem.
2）The scale descaler intake channel gradually increases along Working fluid flow direction flow area, and oxide skin is avoided to accumulate
It brings clogging, exit passageway gradually to increase along Working fluid flow direction flow area, restrains outmost turns plumber's mass flow dynamic pressure
More than inner ring, the drawback that outer race tube flow resistance can be overcome to bring flow velocity small greatly.
3）The oxide skin remove device and method cost are relatively low, simple in structure, easy for installation, not only can to avoid high temperature by
The case where hot face upgrading material brings expensive cost, can also adapt to load rapid fluctuations caused by peak load regulation network, reduces fortune
The burden of administrative staff, and effectively reduce and non-stop number caused by oxide skin blocks booster.
Description of the drawings
Fig. 1 is the connection relation structural schematic diagram of the remove device of the embodiment of the present invention.
Fig. 2 is A-A cross-sectional views in Fig. 1.
In figure：Import header 1, scale descaler 3, preceding elbow 41, rear elbow 42, outlet conduit 5, goes out inlet pipeline 2
Mouth header 6, oxide skin discharge section 31, channel separation plate 32, remover intake channel 33, remover exit passageway 34, oxide skin
Discharge control door 35, scale descaler ontology 36.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
Embodiment.
Shown in Fig. 1 to Fig. 2, it should however be clear that structure, ratio, size etc. depicted in this specification institute accompanying drawings are only used
To coordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can
The qualifications of implementation, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skill
In the range of art content can cover.Meanwhile if in this specification with reference as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
In the present embodiment be used for station boiler high-temperature heating surface oxidized skin remove device, including along Working fluid flow direction according to
Import header 1, inlet pipeline 2, scale descaler 3, preceding elbow 41, rear elbow 42, outlet conduit 5 and the outlet collection of secondary connection
Case 6, scale descaler 3 tilt installation, and scale descaler 3 includes oxide skin discharge section 31, channel separation plate 32, oxide skin
The inside of discharge control door 35 and scale descaler ontology 36, scale descaler ontology 36 is cavity structure, oxide skin row
Go out section 31 to be connected to scale descaler ontology 36, oxide skin discharge control door 35 is mounted in oxide skin discharge section 31, channel
Isolation board 32 is mounted in scale descaler ontology 36, and scale descaler ontology 36 is divided into removing by channel separation plate 32
Device intake channel 33 and remover exit passageway 34, remover intake channel 33 are connected to remover exit passageway 34, remover
Intake channel 33 is connected to inlet pipeline 2, and remover exit passageway 34 is connected to preceding elbow 41, and the shape of section 31 is discharged in oxide skin
Shape for cone, scale descaler ontology 36 is cylinder, and the shape of the cross section of channel separation plate 32 is stairstepping.
In the present embodiment, along the flow area of Working fluid flow direction remover intake channel 33 and remover exit passageway 34
It is sequentially increased.
The material of channel separation plate 32 in the present embodiment is the metal of heat resistant and wear resistant damage.
Inlet pipeline 2, preceding elbow 41, rear elbow 42 in the present embodiment is equal with the quantity of outlet conduit 5, and is more
A, the summation of the cross-sectional area of multiple inlet pipelines 2 is less than the half of the cross-sectional area of scale descaler ontology 36.
Scale descaler 3 in the present embodiment and the angle between horizontal plane are 30 °~60 °, and section is discharged in oxide skin
31 are arranged diagonally downward.
The outer surface of scale descaler ontology 36 in the present embodiment is provided with heat-barrier material or spraying insulating moulding coating.
The side of elbow 41 before scale descaler 3 in the present embodiment is arranged close to.
The sweep-out method for station boiler high-temperature heating surface oxidized skin remove device in the present embodiment, including walk as follows
Suddenly：
The first step：Oxide skin and working medium in inlet pipeline 2 enter in scale descaler ontology 36 simultaneously.
Second step：Oxide skin in scale descaler ontology 36 enters oxide skin row by remover intake channel 33
Go out in section 31, while the working medium in inlet pipeline 2 enters remover exit passageway 34.
Third walks：Oxide skin is discharged control door 35 by oxide skin and is discharged, and working medium is flowed out by preceding elbow 41.
In the present embodiment, by step-like channel separation plate 32 by scale descaler ontology 36 be divided into remover into
Mouth channel 33 and remover exit passageway 34, in remover intake channel 33 and remover exit passageway 34, in two channels
Between position oxide skin is collected using angle of inclination, can greatly reduce super（It is super）Boilers are because of high-temperature surface booster
Cause unit non-the case where stopping.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Claiming etc. can be different, described in this specification above content is only to structure of the invention example explanation.It is all according to
The equivalence changes or simple change done according to the structure, feature and principle described in inventional idea of the present invention, are included in this hair
In the protection domain of bright patent.Those skilled in the art can do described specific embodiment various
The modify or supplement or adopt similar mode of various kinds substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (8)
1. one kind be used for station boiler high-temperature heating surface oxidized skin remove device, include along Working fluid flow direction be sequentially communicated into
Mouth header, inlet pipeline, scale descaler, preceding elbow, rear elbow, outlet conduit and outlet header, the oxide skin are removed
Device tilts installation, it is characterised in that：The scale descaler includes oxide skin discharge section, channel separation plate, oxide skin discharge
Door and scale descaler ontology are controlled, the inside of the scale descaler ontology is cavity structure, the oxide skin discharge
Section be connected to scale descaler ontology, and oxide skin discharge control door is discharged mounted on oxide skin in section, the channel every
It is mounted in scale descaler ontology from plate, scale descaler ontology is divided into remover import by the channel separation plate
Channel and remover exit passageway, the remover intake channel are connected to remover exit passageway, and the remover import is logical
Road is connected to inlet pipeline, and the remover exit passageway is connected to preceding elbow, and the shape of the oxide skin discharge section is circular cone
The shape of shape, the scale descaler ontology is cylinder, and the shape of the cross section of the channel separation plate is stairstepping.
2. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：Along work
The flow area of matter flow direction remover intake channel and remover exit passageway is sequentially increased.
3. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：It is described
The material of channel separation plate is the metal of heat resistant and wear resistant damage.
4. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：It is described
Inlet pipeline, preceding elbow, the quantity of rear elbow and outlet conduit are equal, and be it is multiple, the multiple inlet pipeline it is transversal
The summation of area is less than the half of the cross-sectional area of scale descaler ontology.
5. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：It is described
Angle between scale descaler and horizontal plane is 30 °~60 °, and the oxide skin discharge section is arranged diagonally downward.
6. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：It is described
The outer surface of scale descaler ontology is provided with heat-barrier material or spraying insulating moulding coating.
7. according to claim 1 be used for station boiler high-temperature heating surface oxidized skin remove device, it is characterised in that：It is described
The side of elbow before scale descaler is arranged close to.
8. removing dress for station boiler high-temperature heating surface oxidized skin as described in any claim in a kind of 1-7 such as claim
The sweep-out method set, it is characterised in that：The sweep-out method includes the following steps：
The first step：Oxide skin and working medium in inlet pipeline enter in scale descaler ontology simultaneously；
Second step：The intrinsic oxide skin of scale descaler enters oxide skin by remover intake channel and is discharged in section,
The working medium in inlet pipeline enters remover exit passageway simultaneously；
Third walks：Control door discharge is discharged by oxide skin in oxide skin, and working medium is flowed out by preceding elbow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260227.8A CN108488779B (en) | 2018-03-27 | 2018-03-27 | Device and method for removing oxide skin on high-temperature heating surface of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260227.8A CN108488779B (en) | 2018-03-27 | 2018-03-27 | Device and method for removing oxide skin on high-temperature heating surface of power station boiler |
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| Publication Number | Publication Date |
|---|---|
| CN108488779A true CN108488779A (en) | 2018-09-04 |
| CN108488779B CN108488779B (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810260227.8A Active CN108488779B (en) | 2018-03-27 | 2018-03-27 | Device and method for removing oxide skin on high-temperature heating surface of power station boiler |
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| GB302968A (en) * | 1927-09-23 | 1928-12-24 | Wyatt Meacher | A machine for removing the surface scale from metal plates |
| JPH07146075A (en) * | 1993-11-25 | 1995-06-06 | Sumitomo Metal Ind Ltd | Hearth scale removing apparatus for rotary hearth type heating furnace |
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| CN201760431U (en) * | 2010-09-03 | 2011-03-16 | 任保林 | Rust removal cleaning apparatus of ultrasonic pulse water injection flow pipe wall |
| CN202109468U (en) * | 2011-06-24 | 2012-01-11 | 上海望特能源科技有限公司 | Elbow with equal curvature radius for high-temperature tube panels of power station boilers |
| CN203323100U (en) * | 2013-06-21 | 2013-12-04 | 党祺云 | Tube panel device for heating surface in horizontal flue of boiler |
| CN203599104U (en) * | 2013-11-20 | 2014-05-21 | 北京京燃凌云燃气设备有限公司 | Device for removing PE ball valve welding surface oxide layer |
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| CN107420876A (en) * | 2017-08-08 | 2017-12-01 | 北京必可测科技股份有限公司 | A kind of system and method for improving boiler thermal output scale removal and descaling |
| CN208186312U (en) * | 2018-03-27 | 2018-12-04 | 华电电力科学研究院有限公司 | One kind being used for station boiler high-temperature heating surface oxidized skin remove device |
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| CN108488779B (en) | 2023-06-09 |
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