CN208186314U - For eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking - Google Patents
For eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking Download PDFInfo
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- CN208186314U CN208186314U CN201820583470.9U CN201820583470U CN208186314U CN 208186314 U CN208186314 U CN 208186314U CN 201820583470 U CN201820583470 U CN 201820583470U CN 208186314 U CN208186314 U CN 208186314U
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- oxide skin
- bridge breaker
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Abstract
The utility model relates to a kind of for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking.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 utility model 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 structure, and oxide skin bridge breaker is connected to heat exchanger tube.The utility model 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, reduce the burden of operations staff, and be effectively reduced block booster because of oxide skin caused by non-stop number.
Description
Technical field
The utility model relates to the device and methods that a kind of oxide skin is removed, more particularly to one kind for eliminating boiler height
The device of warm heating surface U-tube elbow oxide skin blocking.
Background technique
The stripping of station boiler high-temperature surface inner wall oxide skin falls behind in overtemperature caused by elbow bottom deposit or even overheat
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 runing 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 will cause boiler tubes, such as application No. is
201611019960.8 Chinese patent.Therefore, pipe cutting mechanical chipping can only be used, this method heavy workload, maintenance are time-consuming
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 traditional technology at present: first is that 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, strict control lifting load rate avoids desuperheating water from putting into too early, reduces the generating rate of oxide skin and falls off
Speed, but situations such as load rapid fluctuations caused by the frequent start-stop of unit and responsive electricity grid peak regulation, can aggravate the life of oxide skin
At rate and the speed to fall off, and bigger challenge is brought to the accurate operation of operations staff.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable use of design
In the device for eliminating the blocking of boiler high temperature heating surface U-tube elbow oxide skin, it is therefore an objective to solve the stripping of high-temperature heating surface oxidized skin
It falls behind in U-tube elbow bottom deposit and causes to overheat booster problem, using U-tube elbow enlarged capacity principle, increase U-tube elbow
Locate circulation area, substantially reduces elbow oxide skin and block brought problem.
The technical scheme in the invention for solving the above technical problem is: one kind is for eliminating boiler high temperature heating surface U
The device that oxide skin blocks at type pipe bend, which is characterized in that anti-including import header, heat exchanger tube, outlet header and oxide skin
Stifled device；The 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 with
The connection of import header, the heat transfer tube outlet end is connect with outlet header；The oxide skin bridge breaker setting is in heat exchange pipe bend
At section, which is hollow structure, which is connected to heat exchanger tube.It is reasonable in design, it is exchanging heat
The elbow setting oxide skin bridge breaker of pipe increases circulation area herein, and oxide skin will not be to flowing through this in elbow deposition
The steam flowing at place affects, and will not reduce the velocity of liquid assets of steam, 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, the number of heat exchanger tube can also be connected simultaneously with outermost layer heat exchanger tube and worst outer layer heat exchanger tube
Amount depends on the actual conditions of oxide skin blocking.
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 right side of oxide skin bridge breaker is arranged in the top of stifled device, the bridge breaker outlet, 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 right side of oxide skin bridge breaker is arranged in the top of device, the bridge breaker outlet, 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, average actual internal area inside the oxide skin bridge breaker by 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 for eliminating the blocking of 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 in heat exchanger tube by import header, 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.
The utility model compared with prior art, has the following advantages that and effect:
1) oxide skin bridge breaker uses enlarged capacity principle, by increasing U-tube elbow circulation area, greatly reduces oxidation
A possibility that skin blocks, 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) cost is relatively low for oxide skin bridge breaker, and structure is simple, easy for installation, not only can upgrade material to avoid high-temperature surface
Matter bring valuableness cost, the case where being also adapted to load rapid fluctuations caused by peak load regulation network, reduce the negative of operations staff
Load, and be effectively reduced block booster because of oxide skin caused by non-stop number.
Detailed description of the invention
Fig. 1 is the arragement construction schematic diagram of the oxide skin bridge breaker of cube structure in the utility model embodiment.
Fig. 2 is the structural schematic diagram of the oxide skin bridge breaker of cube structure in the utility model embodiment.
Fig. 3 is the arragement construction schematic diagram of the oxide skin bridge breaker of sphere structure in the utility model embodiment.
Fig. 4 is the structural schematic diagram of the oxide skin bridge breaker of sphere structure in the utility model embodiment.
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 embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
It is a kind of for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking, packet referring to Fig. 1 to Fig. 4
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 structure, which is connected to heat exchanger tube 2.
Heat exchanger tube 2 is U-shaped structure, which is provided with multiple, the multiple composition of heat exchanger tubes 2 heat-exchanging tube bundles.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 of oxide skin blocking.
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, be also possible to sphere structure.When oxide skin bridge breaker 7 is cube
When body structure, the top of oxide skin bridge breaker 7 is arranged in bridge breaker import 71, and bridge breaker outlet 72 is arranged in oxide skin bridge breaker
7 right side, bridge breaker oxide skin remove the bottom left that oxide skin bridge breaker 7 is arranged in mouth 73.When oxide skin bridge breaker 7 is ball
When body structure, the top of oxide skin bridge breaker 7 is arranged in bridge breaker import 71, and bridge breaker outlet 72 is arranged in oxide skin bridge breaker
7 right side, bridge breaker oxide skin remove the bottom center that oxide skin bridge breaker 7 is arranged in mouth 73.In addition to this, oxide skin is anti-blocking
Device 7 is also possible to other Rational structures.
The outer surface of oxide skin bridge breaker 7 has thermal insulation layer, and thermal insulation layer is made of heat-barrier material, can be increased with high temperature resistant
Its service life.Average actual internal area inside oxide skin bridge breaker 7 by 5~8 times of 2 sectional area of connection heat exchanger tube, steam
When vapour passes through, the oxide skin of deposition will not be to the raw drag effects of steam stream movable property.
A method of for eliminating the blocking of boiler high temperature heating surface U-tube elbow oxide skin, it is used for using above-mentioned
Eliminate the device of boiler high temperature heating surface U-tube elbow oxide skin blocking；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 utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (8)
1. it is a kind of for eliminate boiler high temperature heating surface U-tube elbow oxide skin blocking device, which is characterized in that including into
Mouth header (1), heat exchanger tube (2), outlet header (6) and oxide skin bridge breaker (7)；The heat exchanger tube (2) includes heat exchange pipe bend
Section (3), heat exchanger tube input end (4) and heat transfer tube outlet end (5), the heat exchanger tube input end (4) connect with import header (1),
The heat transfer tube outlet end (5) connect with outlet header (6)；Oxide skin bridge breaker (7) setting is in heat exchange pipe bend section (3)
Place, the oxide skin bridge breaker (7) are hollow structure, which is connected to heat exchanger tube (2).
2. it is according to claim 1 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the heat exchanger tube (2) is U-shaped structure, which is provided with multiple, and the multiple heat exchanger tubes (2) compositions change
Heat pipe bundle.
3. it is according to claim 2 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the oxide skin bridge breaker (7) is connected to outer layer heat exchanger tube (2).
4. it is according to claim 1 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the oxide skin bridge breaker (7) includes that bridge breaker import (71), bridge breaker outlet (72) and bridge breaker oxide skin are clear
Except mouth (73)；The bridge breaker import (71) is connected to heat exchanger tube input end (4), and the bridge breaker outlet (72) goes out with heat exchanger tube
Mouth end (5) is connected to.
5. it is according to claim 4 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the oxide skin bridge breaker (7) is cube structure, and the bridge breaker import (71) is arranged in oxide skin bridge breaker
(7) top, on the right side of oxide skin bridge breaker (7), the bridge breaker oxide skin is removed for bridge breaker outlet (72) setting
Bottom left of mouth (73) setting in oxide skin bridge breaker (7).
6. it is according to claim 4 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the oxide skin bridge breaker (7) is sphere structure, and the bridge breaker import (71) is arranged in oxide skin bridge breaker
(7) top, on the right side of oxide skin bridge breaker (7), the bridge breaker oxide skin is removed for bridge breaker outlet (72) setting
Bottom center of mouth (73) setting in oxide skin bridge breaker (7).
7. it is according to claim 1 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
It is characterized in that, the outer surface of the oxide skin bridge breaker (7) has thermal insulation layer, and the thermal insulation layer is made of heat-barrier material.
8. it is according to claim 1 for eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking,
Be characterized in that, the internal average actual internal area of the oxide skin bridge breaker (7) by connection heat exchanger tube (2) sectional area 5~8
Times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820583470.9U CN208186314U (en) | 2018-04-24 | 2018-04-24 | For eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820583470.9U CN208186314U (en) | 2018-04-24 | 2018-04-24 | For eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking |
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| Publication Number | Publication Date |
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| CN208186314U true CN208186314U (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820583470.9U Active CN208186314U (en) | 2018-04-24 | 2018-04-24 | For eliminating the device of boiler high temperature heating surface U-tube elbow oxide skin blocking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548171A (en) * | 2018-04-24 | 2018-09-18 | 华电电力科学研究院有限公司 | The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin |
-
2018
- 2018-04-24 CN CN201820583470.9U patent/CN208186314U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548171A (en) * | 2018-04-24 | 2018-09-18 | 华电电力科学研究院有限公司 | The device and method blocked for eliminating boiler high temperature heating surface U-tube elbow oxide skin |
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