CN108167857A - A kind of high efficiency sleeve type steam air heater device - Google Patents
A kind of high efficiency sleeve type steam air heater device Download PDFInfo
- Publication number
- CN108167857A CN108167857A CN201711406056.7A CN201711406056A CN108167857A CN 108167857 A CN108167857 A CN 108167857A CN 201711406056 A CN201711406056 A CN 201711406056A CN 108167857 A CN108167857 A CN 108167857A
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- China
- Prior art keywords
- steam
- tube
- header
- air heater
- pipe
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
- F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to a kind of high efficiency sleeve type steam air heater devices, one end top of the device in outer framework (9) is equipped with steam header (7), one end of the steam header (7) taps into steam pipe (5), another termination inner tube (1), outer tube (2) is cased with outside said inner tube (1), outer tube (2) one end is closed by outer tube pipe close (3), and outer tube (2) outer wall is wound with fin (4) and forms finned tube；One end lower part in outer framework (9) is equipped with hydrophobic header (8), a termination drain pipe (6) of hydrophobic header (8), another termination outer tube (2).The device uses coaxial structure, and hot fluid enters from inner tube, through room back of turning back, and passes through the return of the sandwich passage between outer tube and inner tube.Entire sleeve outer wall tends to be uniform along pipe range direction Temperature Distribution, and thermal expansion leakage, elbow can be avoided to wash away leakage, export phenomena such as hydrophobic icing well.Have many advantages, such as that compact-sized, easy to process, of low cost, service life is long.
Description
Technical field
The present invention relates to a kind of thermal power plant boiler ancillary equipments, more particularly to a kind of to be used to control boiler low-temperature burn into section
The high efficiency sleeve type steam air heater device that can be lowered consumption.
Background technology
Boiler Air Heater's are the ancillary equipments for controlling boiler low-temperature corrosion.In the 1970s, China's boiler of power plant low temperature
Corrosion is quite serious, the vertical topic tackling key problem of electromechanics two at that time, and one of achievement is exactly using steam air heater equipment.Temperature is relatively low in winter
When, during boiler startup and underrun, exhaust gas temperature it is relatively low when, will be extraneous using steam warming machine
After air themperature raising certain amplitude, it is re-fed into boiler air preheater.The air preheater arrival end of station boiler is using warm
After wind device, metallic walls can be made to avoid the sulfuric acid corrosion caused by oxygen corrosion caused by preheater metal surface and sulfur trioxide
Dust stratification considerably reduce, reason does not block up ash and causes the increase of air inducing resistance, so as to greatly prolong the service life of air preheater,
Ensure the safe operation of unit.
The steam air heater that power station uses at present has the following problems：Working medium side-entrance is superheated steam, and centre is saturated vapor
With the mixture of condensation water, export as subcooled water, it is larger along the pipe range direction tube wall temperature difference, it causes to restrain the entirety along pipe range direction
Thermal expansion causes, in weak commissure drawing crack, to cause leakage accident；When ambient temperature is relatively low, steam air heater outlet is also easily caused
Icing phenomenon；In addition, the elbow of coiled steam air heater in During Process of Long-term Operation, is subjected to washing away for steam and condensation water, easily
Leakage accident occurs.The special tectonic of traditional steam air heater leads to after its dust stratification not easy cleaning, easily blocks, wind collateral resistance increases
Add, so that subsidiary engine power consumption increases, unit on-load ability reduces.
Invention content
Technical problem：Problem to be solved by this invention is to be blocked for traditional steam air heater of utility boiler and leakage is asked
Topic, proposes that a kind of manufacturing process is simple, cheap, easy to install and use, the high efficiency sleeve type of energy long-term safety stable operation
Steam air heater device.
Technical solution：To achieve the above object, the technical scheme is that：Using steam steam extraction as work heat source, it is passed through
Steam air heater, cold air transversal flow steam air heater finned-tube bundle, air preheat is improved by the heat exchange between steam and cold air
The air themperature of device entrance, so as to which boiler low-temperature be avoided to corrode.
A kind of high efficiency sleeve type steam air heater device of the present invention includes inner tube, outer tube, outer tube pipe close, fin, steam inlet pipe, dredges
Water pipe, steam header, hydrophobic header and outer framework；One end top in outer framework is equipped with steam header, the steam header
One end taps into steam pipe, another termination inner tube, and said inner tube is cased with outer tube outside, and outer tube one end is closed by outer tube pipe close, outer tube outer wall
It is wound with fin and forms finned tube；One end lower part in outer framework is equipped with hydrophobic header, and the one of hydrophobic header terminates drain pipe, separately
One termination outer tube.
Wherein, inner and outer tubes are coaxially nested, and inner tube forms continuous passage via turn back room and inner and outer pipes interlayer, steam into
Mouth and hydrophobic outlet are positioned at steam header one end of steam air heater.
Outer tube is around with fin and forms finned tube, and cold fluid transversal flow finned tube carries out heat exchange with hot fluid in pipe.
Steam is heated after steam inlet pipe enters steam header dilatation, is evenly distributed by fin tube inlet to each group of fin
Pipe；Condensed water converges to hydrophobic header through hydrophobic outlet, is discharged by drain pipe.
Finned tube end of turning back is not welded and fixed with outer framework, vary with temperature can move freely it is flexible.
The present invention changes the type of flow of the heating steam in steam air heater using coaxial sleeve, by heating auxiliary steam
The steam header of steam air heater is passed through, is evenly distributed after dilatation to each inner tube, flows successively through inner tube, turn back room and inner and outer pipes interlayer sky
Between, steam transfers heat to fin, and fin transfers heat to cold wind again, and steam condenses heat release in heat transfer process,
Become condensation water to tumble along tube wall, using the dead weight of condensation water back to hydrophobic side header, and be discharged by drain pipe.
There is interlayer between the steam header and hydrophobic header, steam and condensation water are separated, to prevent steam header
Bilayer can be used in heat transfer between hydrophobic header, interlayer, and centre adds the mode of air layer to realize.
The steam air heater is along air-flow direction, and 2 to 3 row's finned tube of arranged crosswise, often arranging has several finned tubes.
Advantageous effect：The beneficial effects of the present invention are：Using coaxial structure, hot fluid enters from inner tube, through turning back
Room back, and pass through the return of the sandwich passage between outer tube and inner tube, the inlet and outlet for heating steam overlaps, outside entire casing
Wall temperature tends to be uniform along pipe range direction, exports drain temperature degree of supercooling very little, is not in icing phenomenon；Due to steam into
Outlet is in the same end of steam air heater, so finned tube only has input end to weld, in the port of export, finned tube not with outer framework
It is welded, can be moved freely along pipe range direction flexible, phenomenon of expanding with heat and contract with cold is absorbed well, so as to solve thermal expansion
The leakage problem brought；In addition, the present apparatus is not directed to bend pipe, be not in that common the washing away of coiled steam air heater is revealed now
As；Since steam is full of entire casing interlayer, condensation water is not easy to form moisture film under the souring of steam, and heat-transfer effect has
It is improved；And drawer type design is employed, and when winter temperature is relatively low, steam air heater is inserted into braced frame, it usually when not used, will
It is extracted out, can not only reduce wind collateral resistance, is also allowed for cleaning steam air heater and is blocked up ash.
Description of the drawings
Fig. 1 is the structure diagram of bushing type steam air heater of the present invention；
Fig. 2 is the close-up schematic view of bushing type steam air heater finned tube of the present invention.
Wherein have：Inner tube 1, outer tube 2, outer tube pipe close 3, fin 4, steam inlet pipe 5, drain pipe 6, steam header 7, hydrophobic header
8th, outer framework 9, steam inlet 1.1, hydrophobic outlet 1.2.
Specific embodiment
Below in conjunction with the accompanying drawings 1,2, it elaborates to the present invention：
A kind of high efficiency sleeve type steam air heater device of the present invention include inner tube 1, outer tube 2, outer tube pipe close 3, fin 4, into vapour
Pipe 5, drain pipe 6, steam header 7, hydrophobic header 8 and outer framework 9；One end top in outer framework 9 is equipped with steam header 7,
One end of the steam header 7 taps into steam pipe 5, another termination inner tube 1, and said inner tube 1 is cased with outer tube 2 outside, and 2 one end of outer tube is by outer tube
Pipe close 3 is closed, and 2 outer wall of outer tube is wound with fin 4 and forms finned tube；One end lower part in outer framework 9 is equipped with hydrophobic header 8, dredges
One termination drain pipe 6 of water manifold 8, another termination outer tube 2.
The inner tube of every group of finned tube is connected with steam header 7, as the steam inlet 1.1 of finned tube, drain pipe 6 with it is hydrophobic
Header 8 is connected, and the outer tube of every group of finned tube is connected with hydrophobic header 8, as the hydrophobic outlet 1.2 of finned tube, all finned tubes
It is placed in outer framework 9；The steam air heater right end finned tube outer tube 2 is not welded with outer framework 9, can be free along pipe range direction
Moving telescopic.
The inner and outer pipe uses boiler hot rolling 20G seamless steel pipes, and fin is formed by flake aluminum coiling.
The steam air heater is along air-flow direction, and 2 to 3 row's finned tube of arranged crosswise, often arranging has several finned tubes, specific wing
The radical and number of rows of piece pipe, are determined by actually required heat exchange area, i.e., are carried out according to air temperature increase requirement and heating steam parameter
Thermodynamic computing determines after checking.
It can be needed in a manner that multiple steam air heaters are in parallel according to heat exchange in practical applications.
Embodiment：
Fluid is heated using steam turbine steam extraction or steam main pipe steam extraction, steam enters steam header 7, steam via steam inlet pipe 5
Header 7 is used for steam expansion, and passes through steam inlet 1.1 and evenly distribute steam to each group of finned tube.Steam flows through inner tube simultaneously
Change in the room of turning back and flow to, full of entire casing interlayer, carry out heat exchange with cool ambient air and condense, it is cold in every group of finned tube
Condensate is collected to hydrophobic header 8, then discharge by water-supply-pipe 6 by hydrophobic outlet 1.2.Since heat transfer process not only occurs on wing
It between piece pipe and cold air, equally exchanges heat between the thermal medium in inner tube 1 and casing interlayer, is condensed at hydrophobic outlet 1.2
Water is by the superheated steam heating in inner tube 1, degree of supercooling very little, so entire finned tube outer tube wall temperature is along pipe range directional spreding
Uniformly.Since steam air heater right end finned tube outer tube 2 does not carry out welding fastening with outer framework 9, when finned tube expanded by heating or to the cold
It during contraction, can freely stretch along pipe range direction, be not in weld seam fracture phenomena caused by when stretching or squeeze.
The bushing type steam air heater reasonable design of the present invention, simple in structure, its processing and fabricating is very convenient, with traditional warm wind
Device is compared, overcome easily leakage, easily freeze, difficult cleaning, the shortcomings of wind collateral resistance is big, service life is short, have and promote well
Use value.
Claims (7)
1. a kind of high efficiency sleeve type steam air heater device, it is characterised in that：The device includes inner tube (1), outer tube (2), outer tube pipe close
(3), fin (4), steam inlet pipe (5), drain pipe (6), steam header (7), hydrophobic header (8) and outer framework (9)；In outer framework
(9) one end top in is equipped with steam header (7), and one end of the steam header (7) taps into steam pipe (5), another termination inner tube
(1), outer tube (2) is cased with outside said inner tube (1), outer tube (2) one end is closed by outer tube pipe close (3), and outer tube (2) outer wall is wound with fin
(4) finned tube is formed；One end lower part in outer framework (9) is equipped with hydrophobic header (8), and a termination of hydrophobic header (8) is hydrophobic
It manages (6), another termination outer tube (2).
2. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：Inner tube (1) and outer tube (2)
Coaxial nested, inner tube (1) is via room and inner and outer pipes interlayer composition continuous passage, steam inlet (1.1) and the hydrophobic outlet of turning back
(1.2) positioned at the steam header of steam air heater (7) one end.
3. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：Outer tube (2) is around with wing
Piece (4) forms finned tube, and cold fluid transversal flow finned tube carries out heat exchange with hot fluid in pipe.
4. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：Steam is heated through steam inlet pipe
(5) it into after steam header (7) dilatation, is evenly distributed by fin tube inlet to each group of finned tube；Condensed water is through hydrophobic outlet
Hydrophobic header (8) is converged to, is discharged by drain pipe (6).
5. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：Finned tube turn back end with it is outer
Frame (9) is not welded and fixed, vary with temperature can move freely it is flexible.
6. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：The inner and outer pipe uses
Boiler hot rolling 20G seamless steel pipes, fin are formed by flake aluminum coiling.
7. a kind of high efficiency sleeve type steam air heater device according to claim 1, it is characterised in that：The steam air heater is along air
Flow direction, 2 to 3 row's finned tube of arranged crosswise, often arranging has several finned tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406056.7A CN108167857A (en) | 2017-12-22 | 2017-12-22 | A kind of high efficiency sleeve type steam air heater device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406056.7A CN108167857A (en) | 2017-12-22 | 2017-12-22 | A kind of high efficiency sleeve type steam air heater device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108167857A true CN108167857A (en) | 2018-06-15 |
Family
ID=62523431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711406056.7A Pending CN108167857A (en) | 2017-12-22 | 2017-12-22 | A kind of high efficiency sleeve type steam air heater device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748400A (en) * | 2019-09-25 | 2020-02-04 | 杨皓 | Improvement method of automobile exhaust purifier with temperature control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003258A (en) * | 2003-06-11 | 2005-01-06 | Osaka Gas Co Ltd | Heat exchanger and combustion device using the same |
| CN201600054U (en) * | 2010-02-03 | 2010-10-06 | 李玉静 | Heat exchange device with insert tubes inside |
| CN202018215U (en) * | 2011-02-28 | 2011-10-26 | 西安华江冶金化工设备有限公司 | Double-pipe air heat exchanger |
| US20130344447A1 (en) * | 2012-06-26 | 2013-12-26 | Robert Bosch Gmbh | Oil premix burner |
| CN203642217U (en) * | 2013-11-14 | 2014-06-11 | 江苏东方成套设备制造有限公司 | Radiant-tube-type heat exchanger |
-
2017
- 2017-12-22 CN CN201711406056.7A patent/CN108167857A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003258A (en) * | 2003-06-11 | 2005-01-06 | Osaka Gas Co Ltd | Heat exchanger and combustion device using the same |
| CN201600054U (en) * | 2010-02-03 | 2010-10-06 | 李玉静 | Heat exchange device with insert tubes inside |
| CN202018215U (en) * | 2011-02-28 | 2011-10-26 | 西安华江冶金化工设备有限公司 | Double-pipe air heat exchanger |
| US20130344447A1 (en) * | 2012-06-26 | 2013-12-26 | Robert Bosch Gmbh | Oil premix burner |
| CN203642217U (en) * | 2013-11-14 | 2014-06-11 | 江苏东方成套设备制造有限公司 | Radiant-tube-type heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748400A (en) * | 2019-09-25 | 2020-02-04 | 杨皓 | Improvement method of automobile exhaust purifier with temperature control system |
| CN110748400B (en) * | 2019-09-25 | 2021-10-29 | 杨皓 | Improvement method of automobile exhaust purifier with temperature control system |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180615 |
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| RJ01 | Rejection of invention patent application after publication |