CN2460867Y - Large parameter spiral groove pipe air preheater - Google Patents
Large parameter spiral groove pipe air preheater Download PDFInfo
- Publication number
- CN2460867Y CN2460867Y CN00221916U CN00221916U CN2460867Y CN 2460867 Y CN2460867 Y CN 2460867Y CN 00221916 U CN00221916 U CN 00221916U CN 00221916 U CN00221916 U CN 00221916U CN 2460867 Y CN2460867 Y CN 2460867Y
- Authority
- CN
- China
- Prior art keywords
- groove
- tube
- spiral
- flue gas
- spiral grooved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 20
- 239000003546 flue gas Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000001997 corrosion-resisting alloy Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本实用新型涉及一种大参数螺旋槽管空气预热器,用于电站锅炉的烟气对空气的预热。器内设有螺旋槽管,螺旋槽管的管壁设有径向内凹并螺旋形延伸的螺旋槽,该螺旋槽在管内壁呈凸弧面,槽深为3.0～4.0mm,槽距为40～80mm,槽半径为4.0～5.0mm。以上大参数的螺旋槽使烟气在管内流动的过程中充分旋转,能最大限度地破坏层流边界层,强化换热并减善积灰。
The utility model relates to a large-parameter spiral groove tube air preheater, which is used for preheating the air by flue gas of a boiler in a power station. There is a spiral grooved tube inside the device, and the wall of the spiral grooved tube is provided with a radially concave and spirally extended spiral groove. The spiral groove is a convex arc surface on the inner wall of the tube, the groove depth is 3.0-4.0mm, and the groove distance is 40~80mm, the groove radius is 4.0~5.0mm. The spiral groove with the above-mentioned large parameters makes the flue gas fully rotate in the process of flowing in the pipe, which can destroy the laminar boundary layer to the greatest extent, enhance heat transfer and reduce ash accumulation.
Description
The utility model relates to a kind of big parameter spiral grooved tube air preheater, is used for generating plant flue gas to going into the stove preheating of air.
The tail flue gas temperature of station boiler generally still has the high temperature about 500 ℃, so fume emission needs to reclaim heat by air preheater as last, utilize the waste heat of flue gas to improve the charging temperature of air, to improve the thermal efficiency of boiler.Be provided with a plurality of tubulations in the air preheater, flue gas makes the temperature of self reduce the back discharging by the tubulation air that the heat transferred pipe is outer simultaneously.According to hydrodynamics, in the flow process, there is laminar boundary layer in flue gas, thereby has reduced the heat exchange effect of flue gas in pipe near tube wall.Reported in literature is arranged, and existing light pipe changes spiral grooved tube into, and promptly tube wall is provided with the helicla flute that the footpath concaves, this groove is convex globoidal inside pipe wall shape, is cancave cambered surface at the pipe outer wall, and flue gas produces rotation when flowing in helix tube, thereby the destruction wake boundary reaches the effect of enhanced heat exchange.But the helicla flute of stipulating in the document is a small parameter, and spin intensity is less, and for the flue gas in power station boiler that average speed is the 6-14 meter per second, the dynamics of breakable layer laminar boundary layer is not enough, and the enhanced heat exchange effect of flue gas is not good enough.
The purpose of this utility model provides a kind of big parameter spiral grooved tube air preheater, it can make the flue gas in power station boiler of big flow produce rotation fully in axial flow, effectively destroy the laminar boundary layer of flue gas, reach best enhanced heat exchange effect, improve the thermal efficiency of flue gas heat exchange.
The empty preheater of the utility model comprises with several fixing spiral grooved tubes of at least two tube sheets, the tube wall of spiral grooved tube is provided with the also helicla flute of spiral extension that directly concaves, and this groove is convex globoidal at inside pipe wall, and groove depth is 3.0～4.0mm, slot pitch is 40～80mm, and groove radius is 4.0～5.0mm.For reducing the resonance between the spiral grooved tube, between several spiral grooved tubes, be weldingly connected with blade.
The utility model air preheater adopts the spiral grooved tube of big parameter, compare with small parameter spiral coil, under the suitable situation of flue gas resistance, the rotation of flue gas is more abundant, breakable layer laminar boundary layer to greatest extent, reach the effect of enhanced heat exchange, anti-dust stratification ability is strengthened, hardly dust stratification.Compare with light pipe, the coefficient of heat transfer α of fume side improves 80～150% than light pipe, and Coefficient K improves 40～60%, all improves nearly one times than existing small parameter helix tube.Under the identical situation of heat output, heat exchange area and bobbin carriage weight reduce, and have saved investment.
Below in conjunction with description of drawings structure of the present utility model.
Fig. 1 is the structural representation of helix tube air preheater.
Fig. 2 is the structural representation of spiral grooved tube.
As shown in Figure 1, this air preheater is provided with anti-2, the lower perforated plate 3 of upper perforated plate 1, middle pipe, and each spiral grooved tube 6 is set up in parallel and fixes by each tube sheet of upper, middle and lower, is weldingly connected by blade 4 between several spiral grooved tubes, to lower the resonance of body.Flue gas in power station boiler passes through in spiral grooved tube 6, in the gap cartonning of air by blade 4, passes through between the pipe of spiral grooved tube, sends into boiler after heating up with flue gas heat exchange in the pipe, the flue gas discharge of then lowering the temperature.Fig. 2 as seen, spiral grooved tube 6 is provided with the helicla flute 61 that concaves of footpath, this groove extends in the length range spiral of pipe 6, groove 61 is convex globoidal at the inwall of pipe 6, is cancave cambered surface at the outer wall of pipe 6.Slot pitch S is 40～80mm, and groove radius R is 4.0～5.0mm, and groove depth t is 3.0～4.0mm.
Spiral grooved tube adopts Q215-Q235 or suitable corrosion-resisting alloy steel ratio-frequency welding to take over, and forms through the special equipment extrusion process.In addition, the transition between groove and the straight length should be slick and sly, fairshaped, to reduce the resistance of flue gas.
Claims (2)
1. big parameter spiral grooved tube air preheater, comprise by several fixing spiral grooved tubes of tube sheet, the tube wall of spiral grooved tube is provided with the also helicla flute of spiral extension that directly concaves, this helicla flute is convex globoidal at the inwall of pipe, it is characterized in that groove depth is 3.0～4.0mm, slot pitch is 40～80mm, and groove radius is 4.0～5.0mm.
2. big parameter spiral grooved tube air preheater according to claim 1 is characterized in that being weldingly connected with blade between several spiral grooved tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00221916U CN2460867Y (en) | 2000-09-27 | 2000-09-27 | Large parameter spiral groove pipe air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00221916U CN2460867Y (en) | 2000-09-27 | 2000-09-27 | Large parameter spiral groove pipe air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2460867Y true CN2460867Y (en) | 2001-11-21 |
Family
ID=33586740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00221916U Expired - Fee Related CN2460867Y (en) | 2000-09-27 | 2000-09-27 | Large parameter spiral groove pipe air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2460867Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115378A (en) * | 2013-03-18 | 2013-05-22 | 孙连启 | Demountable type spiral pipe air preheater |
| CN112322816A (en) * | 2020-11-05 | 2021-02-05 | 山东天铭重工科技股份有限公司 | Efficient heat exchange cooling wall for blast furnace and cooling method thereof |
-
2000
- 2000-09-27 CN CN00221916U patent/CN2460867Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115378A (en) * | 2013-03-18 | 2013-05-22 | 孙连启 | Demountable type spiral pipe air preheater |
| CN112322816A (en) * | 2020-11-05 | 2021-02-05 | 山东天铭重工科技股份有限公司 | Efficient heat exchange cooling wall for blast furnace and cooling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |