CN201748407U - Low-pressure heater with composite structure - Google Patents
Low-pressure heater with composite structure Download PDFInfo
- Publication number
- CN201748407U CN201748407U CN2010205109417U CN201020510941U CN201748407U CN 201748407 U CN201748407 U CN 201748407U CN 2010205109417 U CN2010205109417 U CN 2010205109417U CN 201020510941 U CN201020510941 U CN 201020510941U CN 201748407 U CN201748407 U CN 201748407U
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- section
- shell
- pressure heater
- heat exchange
- tube
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- Expired - Fee Related
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a low-pressure heater with a composite structure. The low-pressure heater comprises a shell (1), a tube bundle (3), close covers (12), a tube pass inlet (11), a tube pass outlet (8), a shell pass inlet (7) and a shell pass outlet (9), wherein the tube bundle (3) is arranged in the shell; the close covers (12) are arranged at the two ends of the shell; the tube pass inlet (11) and the tube pass outlet (8) are arranged on the close covers (12); the shell pass inlet (7) and the shell pass outlet (9) are arranged on the shell (1); the shell (1) forms a superheat section (6), a condensation section (4) and a cooling section (10) in sequence along the flow direction of the medium in a shell pass; the superheat section (6) is positioned at the shell pass inlet (7); the cooling section (10) is positioned under the superheat section (6); and the condensation section (4) is positioned at one side of the superheat section (6) and one side of the cooling section (10). The low-pressure heater takes full use of the heat exchange area, improves the heat exchange efficiency and prolongs the service life of equipment.
Description
Technical field
The utility model relates to a kind of heat exchanger, and particularly a kind of deflection plate mixes the composite construction low-pressure heater that uses with rod baffle.
Background technology
Low-pressure heater is the key equipment in the thermal power plant.Low-pressure heater is to utilize the low-pressure pumping steam of steam turbine that boiler feedwater is heated, make boiler feedwater reach desired temperature, thereby reduce energy resource consumption, increase unit capacity, thereby the heat transmission equipment of raising power plant efficiency of thermal cycle is the part of power plant's heat regenerative system.Traditional low-pressure heater is a baffle shell-and-tube heat exchanger, and shell side is provided with some deflection plates, and wherein tube side is walked in boiler feedwater, and high-temperature steam is walked shell side.Heat exchange is carried out in the feedwater of flowing in the high-temperature steam of shell side and the tube side like this.Make boiler feedwater reach desired temperature.But this baffle plate type heat exchanger is because there are following problem when carrying out heat exchange in steam of walking about at shell side and heat exchanger tube:
(1), have certain dead band of walking about, at shell-side thus the effective heat transfer area of heat exchanger is reduced;
(2), deflection plate can produce resistance that steam power is reduced, and makes steam cooling back condensed water be deposited on the heat exchanger tube surface, makes the heat-transfer effect variation of heat exchanger tube;
(3), the steam of elevated pressures makes heat exchanger tube produce vibration, this vibration makes heat exchanger tube and deflection plate cause friction, accumulated time can make heat exchanger tube produce to break, the tube sheet leakage, thus the life-span of whole heat exchanger is shortened greatly.
Summary of the invention:
The purpose of this utility model provides that a kind of effective heat transfer area is big, heat exchange efficiency is high, flow resistance is little, the composite construction low-pressure heater of long service life.
The composite construction low-pressure heater that the utility model provides, comprise housing, housing the inside tube bank, housing two ends capping and be arranged on the shell side that the tube side in the capping imports and exports and be arranged on the housing and import and export, the MEDIA FLOW of housing in the shell side is to being formed with superheat section, condensation segment and cooling section successively, wherein superheat section is positioned at the shell side entrance location, cooling section is positioned at below the superheat section, and condensation segment is positioned at a side of superheat section and cooling section.
Rod baffle mechanism is installed respectively in described superheat section, the cooling section at interval; The condensation segment inner room is every deflection plate is installed.
The superheat section heat exchange area accounts for the 2-4% of the tube bank heat exchange gross area, and the cooling section heat exchange area accounts for the 6-8% of the tube bank heat exchange gross area.
Rod baffle mechanism comprises rod baffle spaced apart in retainer ring and the retainer ring, the rod baffle vertical distribution in the adjacent rod baffle mechanism.
The utility model is provided with rod baffle replacement deflection plate at the superheat section and the cooling section of shell side, the steam that enters shell side is walked about along tube bank at superheat section earlier, when running into rod baffle, produce flow-disturbing, produce flow-disturbing in next rod baffle again then, so repeatedly the disturbance attenuate laminar boundary layer, and made full use of heat exchange area, utterly destroyed flow dead, substantially eliminated induced vibration, and flow resistance reduces greatly; Thereafter steam enters condensation segment again, enters cooling section at last; So both make full use of heat exchange area, improved heat exchange efficiency, prolonged service life of equipment again.
Description of drawings
Fig. 1 is a structure chart of the present utility model;
Fig. 2, Fig. 3 are the distribution schematic diagrams of rod baffle in the adjacent baffling of the present utility model mechanism.
The specific embodiment
With reference to Fig. 1, the composite construction low-pressure heater that the utility model provides, comprise housing 1, housing 1 the inside tube bank 3, housing 1 two ends capping 12 and be arranged on tube side in the capping 12 and import and export (11,8) and be arranged on shell side import and export (7,9) on the housing 1, the MEDIA FLOW of housing 1 in the shell side is to being formed with superheat section 6, condensation segment 4 and cooling section 19 successively, wherein superheat section 7 is positioned at shell side import 7 positions, cooling section 10 is positioned at below the superheat section 6, and condensation segment 4 is positioned at a side of superheat section 7 and cooling section 10.
Described superheat section 6, cooling section are equipped with rod baffle mechanism 5 respectively for 10 li at interval; Condensation segment 4 inner rooms are every deflection plate 2 is installed.Rod baffle mechanism 5 comprises rod baffle 13 spaced apart in retainer ring 14 and the retainer ring 14, rod baffle 13 vertical distribution in the adjacent rod baffle mechanism 5.Superheat section 6 heat exchange areas account for 3% of the tube bank heat exchange gross area, and cooling section 10 heat exchange areas account for 7% of the tube bank heat exchange gross area.Like this, the fluid of condensation segment 4 is a cross-current to tube bank, and the fluid of superheat section 6, cooling section 10 is a longitudinal stream to tube bank.
Tube bank 3 is passed by the gap between the rod baffle in the rod baffle mechanism 5 13, because tube bank 3 is passed in rod baffle 13 layerings, can fix the heat exchanger tube in the tube bank 3 like this.Bar be can install and fix in the retainer ring 14 in the rod baffle mechanism 5, fixedly retainer ring 14 and the effect of strengthening rod baffle 13 are used for supporting.
Claims (4)
1. composite construction low-pressure heater, comprise housing [1], housing the inside tube bank [3], housing two ends capping [12] and be arranged on tube side in the capping [12] and import and export [11,8] and be arranged on shell side import and export [7,9] on the housing [1], it is characterized in that the MEDIA FLOW of housing [1] in the shell side is to being formed with superheat section [6], condensation segment [4] and cooling section [10] successively, wherein superheat section [6] is positioned at shell side import [7] position, cooling section [10] is positioned at below the superheat section [6], and condensation segment [4] is positioned at a side of superheat section [6] and cooling section [10].
2. composite construction low-pressure heater according to claim 1 is characterized in that described superheat section [6], cooling section [10] lining are equipped with rod baffle mechanism [5] respectively at interval; Condensation segment [4] inner room is every deflection plate [2] is installed.
3. composite construction low-pressure heater according to claim 2 is characterized in that superheat section [6] heat exchange area accounts for the 2-4% of the tube bank heat exchange gross area, and cooling section [10] heat exchange area accounts for the 6-8% of the tube bank heat exchange gross area.
4. composite construction low-pressure heater according to claim 1 is characterized in that rod baffle mechanism [5] comprises rod baffle [13] spaced apart in retainer ring [14] and the retainer ring, rod baffle [13] vertical distribution in the adjacent rod baffle mechanism [5].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205109417U CN201748407U (en) | 2010-08-31 | 2010-08-31 | Low-pressure heater with composite structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205109417U CN201748407U (en) | 2010-08-31 | 2010-08-31 | Low-pressure heater with composite structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201748407U true CN201748407U (en) | 2011-02-16 |
Family
ID=43583082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205109417U Expired - Fee Related CN201748407U (en) | 2010-08-31 | 2010-08-31 | Low-pressure heater with composite structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201748407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302520A (en) * | 2017-12-22 | 2018-07-20 | 东方电气集团东方汽轮机有限公司 | A kind of low-pressure heater |
-
2010
- 2010-08-31 CN CN2010205109417U patent/CN201748407U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302520A (en) * | 2017-12-22 | 2018-07-20 | 东方电气集团东方汽轮机有限公司 | A kind of low-pressure heater |
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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: 20110216 Termination date: 20170831 |