CN202485513U - Heat exchange base tube of direct air-cooled steam condenser - Google Patents
Heat exchange base tube of direct air-cooled steam condenser Download PDFInfo
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- CN202485513U CN202485513U CN2012200846967U CN201220084696U CN202485513U CN 202485513 U CN202485513 U CN 202485513U CN 2012200846967 U CN2012200846967 U CN 2012200846967U CN 201220084696 U CN201220084696 U CN 201220084696U CN 202485513 U CN202485513 U CN 202485513U
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- heat exchange
- air
- base tube
- exchange base
- direct air
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Abstract
The utility model relates to a heat exchange base tube of a direct air-cooled steam condenser. The heat exchange base tube of the direct air-cooled steam condenser is applied to the field of dead steam condensation such as steam turbines of thermal power plants, steam turbines in chemical industry and space division industry. The cross-sectional shape of the heat exchange base tube (1) is a wedge-shape, and a size of the heat exchange base tube changes from being big to being small along the air flowing direction. The wedge-shape structure is adopted to the heat exchange base tube of the direct air-cooled steam condenser, and volume of hot air produced after air expansion can be contained, and the heat exchange base tube of the direct air-cooled steam condenser enables an air flow rate to remain unchanged when the air flows between heat exchange base tubes, and plays a role of reducing air side resistance of the heat exchange base tube of a steam condenser, and therefore the purpose of reducing energy consumption of a fan is achieved. When the heat exchange base tube of the direct air-cooled steam condenser is used for a direct air-cooled steam condenser of a large thermal power plant, an advantage of small resistance can be more notable.
Description
Technical field
The utility model relates to a kind of heat exchange parent tube of direct air cooled condenser.Be applied to exhaust steam condensation fields such as thermal power plant steam turbine, chemical industry and empty branch trade steam turbines.
Background technology
The exhaust steam that steam turbine and steam turbines are discharged need be condensed into water, delivers to boiler and recycles.For the conserve water resource, what be used for that the direct air cooled condenser of exhaust steam condensation uses at home and abroad is very general.The employed heat exchange element of direct air cooled condenser is the finned tube of the outer enhanced heat exchange of pipe, although have multiple form, and the finned tube of using at most at present that still is called single row of tubes.Single row of tubes is made up of parent tube and fin, and the shape of cross section of parent tube is the rectangle flat tube, and its two ends are circular-arc; The cross section of fin also is a rectangle, along the shape that is shaped as serpentine bend longitudinally of parent tube.The material of single row of tubes parent tube is single face covering aluminum plate or single face alclad sheet, and the fin material is an aluminum or aluminum alloy, and parent tube is connected through soldering with fin.
Single row of tubes also exists deficiency.Since the rectangular shape of parent tube and fin, the postpone of single row of tubes in condenser " " word cloth, and the size (or area) of the air flow passage between the outer fin of formed parent tube is constant; Cold air constantly is heated between the fin of parent tube both sides after getting into this passage along the length direction of parent tube cross section, and temperature raises and will cause that density reduces, volume increases, and the flow velocity of air increases simultaneously, and is the highest at the exit flow velocity that arrives finned tube; In this process,, the air velocity increase also increases along with will causing resistance.Result of the test shows, when the air temperature rise reached 30 ℃ of left and right sides, under the condition of same air mass flow, the air drag during single row of tubes hot increased about 30% during than cold conditions (not heating).
Along with thermal power plant, chemical industry and empty industry-specific unit specification constantly enlarge; The size of air cooling tubes condenser also constantly increases; The length of finned tube and quantity increase, the cooling unit of condenser and blower fan more, and the resistance of air side is just more obvious to the influence of blower fan power consumption.Now, use the direct air cooled condenser of single-row back-fin pipe, the power consumption of blower fan is very big, can not satisfy user's requirements of saving energy.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, provides a kind of air side resistance littler direct air cooled condenser heat exchange parent tube, to satisfy user's higher energy-conservation requirement.
The purpose of the utility model is achieved in that a kind of direct air cooled condenser heat exchange parent tube; Heat exchange parent tube cross section is elongated; That the both ends of cross section are is circular-arc, the side is the plane; Said heat exchange parent tube shape of cross section is a wedge shape, its width dimensions along air-flow direction from large to small, towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions.
The utility model direct air cooled condenser heat exchange parent tube, the heat exchange parent tube covers the steel aluminium composite material of aluminium or steel plate forming that single face is aluminized by single face and forms through high-frequency welding, and its weld seam C position is in the end or in the side.
As everyone knows, can expand when air is heated, when the air of expansion flowed between parent tube, flow velocity can increase if the channel size that flows remains unchanged, thereby caused that resistance becomes big.A kind of direct air cooled condenser heat exchange of the utility model parent tube; Parent tube adopts wedge shape, air flow passage is raise along with temperature and enlarges, and has held the volume that hot-air increased after air expands; The flow velocity of air is remained unchanged when flowing through between the adjacent parent tube; Have the condenser of reduction finned tube air side drag effect, reach the purpose that reduces fan energy consumption, meet the requirement of conservation-minded society.
When a kind of direct air cooled condenser heat exchange of the utility model parent tube was used for the large-size thermal power plant direct air cooled condenser, the advantage that its resistance is little can be more remarkable.
Description of drawings
Fig. 1 is the cross-sectional view of prior art air cooling tubes condenser heat exchange parent tube
Fig. 2 is for implementing embodiment 1 cross sectional representation of the utility model, and weld seam is in the end.
Fig. 3 is for implementing embodiment 2 cross sectional representation of the utility model, and weld seam is in the side.
Reference numeral among the figure:
Heat exchange parent tube 1
Cold air A
Hot-air B
Weld seam C.
The specific embodiment
As shown in Figure 2, Fig. 2 is for implementing embodiment 1 cross sectional representation of the utility model.Can find out by Fig. 2; The utility model direct air cooled condenser heat exchange parent tube, heat exchange parent tube 1 cross section is elongated, and the both ends of cross section are circular-arc or rounded; The side is the plane; Said heat exchange parent tube 1 shape of cross section is a wedge shape, its width dimensions along air-flow direction from large to small, towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions.Heat exchange parent tube 1 covers the steel aluminium composite material of aluminium or steel plate forming that single face is aluminized by single face and forms through high-frequency welding, and its weld seam C position is in the end.
In embodiment 1, the length dimension of the cross section of heat exchange parent tube is 200-300mm, leading section width dimensions 18-24mm, rearward end width dimensions 12-20mm.
Heat exchange parent tube 1 inside is mobile exhaust steam (steam), and the outside is the air of convection current, and the air outside managing interior exhaust steam and managing carries out condensing into water after the heat exchange.Cold air A gets between the heat exchange parent tube from the bottom of heat exchange parent tube, becomes hot-air B after being heated and discharges, and as can be seen from the figure, manages volume of air progressively expansion from bottom to top between outer parent tube.
Embodiment 2:
Fig. 3 is for implementing embodiment 2 cross sectional representation of the utility model.Can find out by Fig. 3, a kind of direct air cooled condenser heat exchange of the utility model parent tube, its parent tube cross sectional shape is a wedge shape, weld seam C position is in the side; Heat exchange parent tube 1 size is close with embodiment 1.Present embodiment 2 mainly is that position while welding is different with the difference of embodiment 1.
Claims (3)
1. direct air cooled condenser heat exchange parent tube; Heat exchange parent tube (1) cross section is elongated; That the both ends of cross section are is circular-arc, the side is the plane; It is characterized in that: said heat exchange parent tube (1) shape of cross section is a wedge shape, its width dimensions along air-flow direction from large to small, towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions.
2. a kind of direct air cooled condenser heat exchange parent tube according to claim 1; It is characterized in that: heat exchange parent tube (1) covers the steel aluminium composite material of aluminium or steel plate forming that single face is aluminized by single face and forms through high-frequency welding, and its weld seam C position is in the end or in the side.
3. according to claim 1 or the described a kind of direct air cooled condenser heat exchange parent tube of claim 2; The length dimension that it is characterized in that the cross section of said heat exchange parent tube (1) is 200-300mm; Leading section width dimensions 18-24mm, rearward end width dimensions 12-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200846967U CN202485513U (en) | 2012-03-08 | 2012-03-08 | Heat exchange base tube of direct air-cooled steam condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200846967U CN202485513U (en) | 2012-03-08 | 2012-03-08 | Heat exchange base tube of direct air-cooled steam condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485513U true CN202485513U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200846967U Expired - Fee Related CN202485513U (en) | 2012-03-08 | 2012-03-08 | Heat exchange base tube of direct air-cooled steam condenser |
Country Status (1)
| Country | Link |
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| CN (1) | CN202485513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607311A (en) * | 2012-03-08 | 2012-07-25 | 双良节能系统股份有限公司 | Heat exchange base tube for direct air-cooling condenser |
-
2012
- 2012-03-08 CN CN2012200846967U patent/CN202485513U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607311A (en) * | 2012-03-08 | 2012-07-25 | 双良节能系统股份有限公司 | Heat exchange base tube for direct air-cooling condenser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20200308 |