CN108548171A - The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin - Google Patents
The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin Download PDFInfo
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- CN108548171A CN108548171A CN201810369466.7A CN201810369466A CN108548171A CN 108548171 A CN108548171 A CN 108548171A CN 201810369466 A CN201810369466 A CN 201810369466A CN 108548171 A CN108548171 A CN 108548171A
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- oxide skin
- bridge breaker
- heat exchanger
- exchanger tube
- tube
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008676 import Effects 0.000 claims abstract description 24
- 238000012546 transfer Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 4
- 238000010977 unit operation Methods 0.000 claims description 3
- 241000973497 Siphonognathus argyrophanes Species 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The device and method that the present invention relates to a kind of to block for eliminating boiler high temperature heating surface U-tube elbow oxide skin.It is one of the main problem for perplexing its safe and economical operation that the stripping of station boiler high-temperature surface inner wall oxide skin, which falls behind in overtemperature caused by elbow bottom deposit or even overheats booster,.The present invention includes import header, heat exchanger tube, outlet header and oxide skin bridge breaker；Heat exchanger tube includes that heat exchange pipe bend section, heat exchanger tube input end and heat transfer tube outlet end, heat exchanger tube input end are connect with import header, and heat transfer tube outlet end is connect with outlet header；For the setting of oxide skin bridge breaker at heat exchange pipe bend section, oxide skin bridge breaker is hollow-core construction, and oxide skin bridge breaker is connected to heat exchanger tube.The present invention not only can bring expensive cost to avoid high temperature superheater and reheater upgrading material, the case where may also adapt to load rapid fluctuations caused by peak load regulation network, the burden of operations staff is reduced, and effectively reduces and non-stops number caused by oxide skin blocks booster.
Description
Technical field
The present invention relates to a kind of oxide skin remove device and method, more particularly to one kind for eliminate boiler high temperature by
The device and method that hot face U-tube elbow oxide skin blocks.
Background technology
The stripping of station boiler high-temperature surface inner wall oxide skin falls behind in overtemperature or even overheat caused by elbow bottom deposit
Booster problem is to perplex one of the main problem of its safe and economical operation in recent years.High temperature superheater and reheater tube inner wall
Oxide scale layer fall off, accumulate in U-tube elbow bottom, reduce the passage section of pipeline, increase steam circulation resistance
Power, steam flow is opposite in pipe reduces, and seriously reduces the cooling effect to pipe, causes high temperature superheater and reheater
Pipe short term superheating booster.
With the extension of unit operation time, the thickness of oxidation film increases, negative in the frequent starting of boiler, blowing out or lifting
During lotus, tube temperature amplitude of variation is very big, and since base material is different with the thermal expansion ability of oxidation film, matrix can be to surface
Oxidation film generates the effect drawn or pressed, these effects can all cause oxidation film to crack.In the initial start stage of boiler, due to heating surface
Warm variable Rate is big, and the oxide skin amount of falling off is big, while the flow velocity of steam is low, and oxide skin will be deposited in the elbow of heating surface.Mesh
Preceding high temperature superheater and the U-shaped curved bottom oxide skin accumulation of reheater are more, and individual pipe internal oxidition leather blocks are nucleated shape, Wu Fayong
The processing of the method for pressure-air or steam-line blowing, and chemically handles the damage that can cause boiler tubes, such as application No. is
201611019960.8 Chinese patent.Therefore, pipe cutting mechanical chipping, this method heavy workload, maintenance can only be used to take
It is more, there is the problems such as welding quality again.
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.
Invention content
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and a kind of reasonable design is provided for disappearing
The device and method blocked except boiler high temperature heating surface U-tube elbow oxide skin, it is therefore an objective to solve high-temperature heating surface oxidized skin
Stripping falls behind in U-tube elbow bottom deposit and causes to overheat booster problem, and using U-tube elbow enlarged capacity principle, it is curved to increase U-tube
Circulation area at head substantially reduces elbow oxide skin and blocks caused problem.
Technical solution is used by the present invention solves the above problems：One kind is for eliminating boiler high temperature heating surface U-tube elbow
Locate the device that oxide skin blocks, which is characterized in that including import header, heat exchanger tube, outlet header and oxide skin bridge breaker；It is described
Heat exchanger tube includes heat exchange pipe bend section, heat exchanger tube input end and heat transfer tube outlet end, the heat exchanger tube input end and import header
Connection, the heat transfer tube outlet end is connect with outlet header；The oxide skin bridge breaker setting is at heat exchange pipe bend section, the oxygen
Change skin bridge breaker is hollow-core construction, which is connected to heat exchanger tube.It is reasonable in design, in the elbow of heat exchanger tube
Oxide skin bridge breaker is set and increases circulation area herein, oxide skin will not be to flowing through steam stream herein in elbow deposition
It is dynamic to affect, the velocity of liquid assets of steam will not be reduced, heat exchanger tube can be made effectively to be cooled.
Furthermore, the heat exchanger tube be U-shaped structure, the heat exchanger tube be provided with it is multiple, multiple set of heat exchange tubes at
Heat-exchanging tube bundle.
Furthermore, the oxide skin bridge breaker is connected to outer layer heat exchanger tube.Oxide skin bridge breaker according to actual needs
It can be only connected to outermost layer heat exchanger tube, also can connect the number of heat exchanger tube simultaneously with outermost layer heat exchanger tube and worst outer layer heat exchanger tube
Amount depends on the actual conditions that oxide skin blocks.
Furthermore, the oxide skin bridge breaker includes that bridge breaker import, bridge breaker outlet and bridge breaker oxide skin are clear
Except mouth；The bridge breaker import is connected to heat exchanger tube input end, and the bridge breaker outlet is connected to heat transfer tube outlet end.
Furthermore, the oxide skin bridge breaker is cube structure, and the bridge breaker import setting is anti-in oxide skin
The top of stifled device, the bridge breaker outlet are arranged on the right side of oxide skin bridge breaker, and the bridge breaker oxide skin removes mouth setting
In the bottom left of oxide skin bridge breaker.Its surface of the oxide skin bridge breaker of cube structure is convenient for being fixed with heat exchanger tube,
The Position Design that bridge breaker oxide skin removes mouth is conducive to clear up oxide skin therein.
Furthermore, the oxide skin bridge breaker is sphere structure, and the bridge breaker import setting is anti-blocking in oxide skin
The top of device, the bridge breaker outlet are arranged on the right side of oxide skin bridge breaker, and the bridge breaker oxide skin removes mouth setting and exists
The bottom center of oxide skin bridge breaker.
Furthermore, the outer surface of the oxide skin bridge breaker has thermal insulation layer, and the thermal insulation layer is by heat-barrier material system
At.Increase its service life.
Furthermore, the average actual internal area inside the oxide skin bridge breaker is institute's connection heat exchanger tube sectional area
5~8 times.By the way that oxide skin bridge breaker is arranged in heat exchange pipe bend section, instead of the elbow part of part outer ring heat exchanger tube, increase
The circulation area of elbow part, avoids the blocking of oxide skin.
A method of it is blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin, which is characterized in that use
The device as described above blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin；The method is as follows：In machine
During group operation, after heat transfer tube wall scale spallation, fall into oxide skin bridge breaker, and deposited in oxide skin bridge breaker；
Steam is entered by import header in heat exchanger tube, and is passed sequentially through heat exchanger tube input end, oxide skin bridge breaker and heat exchanger tube and gone out
Mouth end, most leaves through outlet header afterwards, and exchange heat pipe, which carries out cooling, makes its cooling, and in the process, bridge breaker oxide skin is removed
Mouth is in off state；In unit outage, open bridge breaker oxide skin remove mouth, to the oxide skin inside oxide skin bridge breaker into
Row cleaning.Using U-tube elbow enlarged capacity principle, increases U-tube elbow circulation area, effectively prevent elbow oxide skin
The problem of deposition leads to its blocking.
Compared with prior art, the present invention haing the following advantages and effect：
1）Oxide skin bridge breaker uses enlarged capacity principle, and by increasing U-tube elbow circulation area, it is stifled to greatly reduce oxide skin
The possibility of plug has ensured the safe and stable operation of unit.
2）There is oxide skin bridge breaker special oxide skin to remove mouth, efficiently avoid pipe cutting machinery scale blowing work
The problems such as work amount is greatly and welding quality is difficult to ensure again.
3）Oxide skin bridge breaker cost is relatively low, simple in structure, easy for installation, not only can upgrade material to avoid high-temperature surface
The expensive cost that matter is brought, the case where can also adapting to load rapid fluctuations caused by peak load regulation network, reduce the negative of operations staff
Load, and effectively reduce and non-stop number caused by oxide skin blocks booster.
Description of the drawings
Fig. 1 is the arrangement schematic diagram of the oxide skin bridge breaker of cube structure in the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the oxide skin bridge breaker of cube structure in the embodiment of the present invention.
Fig. 3 is the arrangement schematic diagram of the oxide skin bridge breaker of sphere structure in the embodiment of the present invention..
Fig. 4 is the structural schematic diagram of the oxide skin bridge breaker of sphere structure in the embodiment of the present invention.
In figure：Import header 1, heat exchanger tube 2, heat exchange pipe bend section 3, heat exchanger tube input end 4, heat transfer tube outlet end 5, outlet
Header 6, oxide skin bridge breaker 7, bridge breaker import 71, bridge breaker outlet 72, bridge breaker oxide skin remove mouth 73.
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.
Referring to Fig. 1 to Fig. 4, a kind of device blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin, packet
Include import header 1, heat exchanger tube 2, outlet header 6 and oxide skin bridge breaker 7.
Heat exchanger tube 2 includes heat exchange pipe bend section 3, heat exchanger tube input end 4 and heat transfer tube outlet end 5, heat exchanger tube input end 4 with
Import header 1 connects, and heat transfer tube outlet end 5 is connect with outlet header 6；The setting of oxide skin bridge breaker 7 is in heat exchange pipe bend section 3
Place, instead of the elbow part of part outer ring heat exchanger tube 2, increases the circulation area of elbow part, avoids the stifled of oxide skin
Plug, the oxide skin bridge breaker 7 are hollow-core construction, which is connected to heat exchanger tube 2.
Heat exchanger tube 2 is U-shaped structure, which is provided with multiple, the composition heat-exchanging tube bundle of multiple heat exchanger tubes 2.Oxide skin is anti-
Stifled device 7 is connected to outer layer heat exchanger tube 2, and the quantity of connection heat exchanger tube 2 depends on the actual conditions that oxide skin blocks.
Oxide skin bridge breaker 7 includes that bridge breaker import 71, bridge breaker outlet 72 and bridge breaker oxide skin remove mouth 73；It is anti-blocking
Device import 71 is connected to heat exchanger tube input end 4, and bridge breaker outlet 72 is connected to heat transfer tube outlet end 5.
Oxide skin bridge breaker 7 can be cube structure, can also be sphere structure.When oxide skin bridge breaker 7 is cube
When body structure, bridge breaker import 71 is arranged at the top of oxide skin bridge breaker 7, and bridge breaker outlet 72 is arranged in oxide skin bridge breaker
7 right side, bridge breaker oxide skin remove mouth 73 and the bottom left in oxide skin bridge breaker 7 are arranged.When oxide skin bridge breaker 7 is ball
When body structure, bridge breaker import 71 is arranged at the top of oxide skin bridge breaker 7, and bridge breaker outlet 72 is arranged in oxide skin bridge breaker
7 right side, bridge breaker oxide skin remove mouth 73 and the bottom center in oxide skin bridge breaker 7 are arranged.In addition to this, oxide skin is anti-blocking
Device 7 can also be other Rational structures.
There is thermal insulation layer, thermal insulation layer to be made of heat-barrier material for the outer surface of oxide skin bridge breaker 7, can be increased with high temperature resistant
Its service life.Average actual internal area inside oxide skin bridge breaker 7 is 5~8 times of 2 sectional area of institute's connection heat exchanger tube, is steamed
Vapour by when, the oxide skin of deposition will not give birth to drag effects to steam stream movable property.
A method of it blocks for eliminating boiler high temperature heating surface U-tube elbow oxide skin, is used for using above-mentioned
Eliminate the device that boiler high temperature heating surface U-tube elbow oxide skin blocks；Its method is as follows：During unit operation, heat exchange
After 2 inner wall oxide skin of pipe peels off, fall into oxide skin bridge breaker 7, and deposited in oxide skin bridge breaker 7；Steam passes through import
Header 1 enters in heat exchanger tube 2, and passes sequentially through heat exchanger tube input end 4, oxide skin bridge breaker 7 and heat transfer tube outlet end 5, most
It is left by outlet header 6, exchange heat pipe 2, which carries out cooling, makes its cooling, and in the process, bridge breaker oxide skin removes mouth 73 and is
Closed state；In unit outage, open bridge breaker oxide skin remove mouth 73, to the oxide skin inside oxide skin bridge breaker 7 into
Row cleaning.
Although the present invention is disclosed as above with embodiment, it is not limited to protection scope of the present invention, any to be familiar with
The technical staff of this technology changes and retouches made by without departing from the spirit and scope of the invention, should all belong to this hair
Bright protection domain.
Claims (9)
1. a kind of device blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin, which is characterized in that including into
Mouth header（1）, heat exchanger tube（2）, outlet header（6）With oxide skin bridge breaker（7）；The heat exchanger tube（2）Including the pipe bend that exchanges heat
Section（3）, heat exchanger tube input end（4）With heat transfer tube outlet end（5）, the heat exchanger tube input end（4）With import header（1）Connection,
The heat transfer tube outlet end（5）With outlet header（6）Connection；The oxide skin bridge breaker（7）Setting is in heat exchange pipe bend section（3）
Place, the oxide skin bridge breaker（7）For hollow-core construction, the oxide skin bridge breaker（7）With heat exchanger tube（2）Connection.
2. the device according to claim 1 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the heat exchanger tube（2）For U-shaped structure, the heat exchanger tube（2）It is provided with multiple, multiple heat exchanger tubes（2）Composition changes
Heat pipe bundle.
3. the device according to claim 2 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）With outer layer heat exchanger tube（2）Connection.
4. the device according to claim 1 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）Including bridge breaker import（71）, bridge breaker outlet（72）It is clear with bridge breaker oxide skin
Except mouth（73）；The bridge breaker import（71）With heat exchanger tube input end（4）Connection, the bridge breaker outlet（72）Go out with heat exchanger tube
Mouth end（5）Connection.
5. the device according to claim 4 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）For cube structure, the bridge breaker import（71）It is arranged in oxide skin bridge breaker
（7）Top, bridge breaker outlet（72）It is arranged in oxide skin bridge breaker（7）Right side, the bridge breaker oxide skin removes
Mouthful（73）It is arranged in oxide skin bridge breaker（7）Bottom left.
6. the device according to claim 4 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）For sphere structure, the bridge breaker import（71）It is arranged in oxide skin bridge breaker
（7）Top, bridge breaker outlet（72）It is arranged in oxide skin bridge breaker（7）Right side, the bridge breaker oxide skin removes
Mouthful（73）It is arranged in oxide skin bridge breaker（7）Bottom center.
7. the device according to claim 1 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）Outer surface there is thermal insulation layer, the thermal insulation layer is made of heat-barrier material.
8. the device according to claim 1 blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin,
It is characterized in that, the oxide skin bridge breaker（7）Internal average actual internal area is institute's connection heat exchanger tube（2）The 5~8 of sectional area
Times.
9. a kind of method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin, which is characterized in that using such as
Being blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin described in any one of claim 1-8 claims
Device；The method is as follows：During unit operation, heat exchanger tube（2）After inner wall oxide skin peels off, oxide skin bridge breaker is fallen into
（7）In, and in oxide skin bridge breaker（7）Middle deposition；Steam passes through import header（1）Into heat exchanger tube（2）In, and pass sequentially through
Heat exchanger tube input end（4）, oxide skin bridge breaker（7）And heat transfer tube outlet end（5）, most afterwards through outlet header（6）It leaves, exchanges
Heat pipe（2）Carrying out cooling makes its cooling, and in the process, bridge breaker oxide skin removes mouth（73）It is in off state；Stop in unit
When fortune, opens bridge breaker oxide skin and remove mouth（73）, to oxide skin bridge breaker（7）Internal oxide skin is cleared up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369466.7A CN108548171A (en) | 2018-04-24 | 2018-04-24 | The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369466.7A CN108548171A (en) | 2018-04-24 | 2018-04-24 | The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108548171A true CN108548171A (en) | 2018-09-18 |
Family
ID=63512071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810369466.7A Pending CN108548171A (en) | 2018-04-24 | 2018-04-24 | The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108548171A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543580A (en) * | 2022-03-11 | 2022-05-27 | 西安交通大学 | Device for preventing oxide skin of boiler superheater and reheater from being blocked and regulating and controlling method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543580A (en) * | 2022-03-11 | 2022-05-27 | 西安交通大学 | Device for preventing oxide skin of boiler superheater and reheater from being blocked and regulating and controlling method thereof |
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Application publication date: 20180918 |
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