CN203273855U - Externally-arranged steam cooler system in regenerative system of power plant and regenerative system - Google Patents
Externally-arranged steam cooler system in regenerative system of power plant and regenerative system Download PDFInfo
- Publication number
- CN203273855U CN203273855U CN 201320109802 CN201320109802U CN203273855U CN 203273855 U CN203273855 U CN 203273855U CN 201320109802 CN201320109802 CN 201320109802 CN 201320109802 U CN201320109802 U CN 201320109802U CN 203273855 U CN203273855 U CN 203273855U
- Authority
- CN
- China
- Prior art keywords
- feed
- water heater
- steam cooler
- steam
- hydrophobic
- 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.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model provides an externally-arranged steam cooler system in a regenerative system of a power plant and the regenerative system. The regenerative system comprises a multi-level water supply heater, a deoxygenization heater, a water supply piping and a drain piping. The external steam cooler system comprises an externally-arranged steam cooler and a steam piping, wherein the externally-arranged steam cooler is arranged on a drain pipeline of the water supply heater, and a steam inlet of the externally-arranged steam cooler is communicated with high-superheat-degree extracted steam of a turbine through a pipeline; and the externally-arranged steam cooler is used for heating drained water of the water supply heater. Compared with a system which directly heats high-pressure supplied water through the conventional externally-arranged steam cooler system by using the superheat degree of the high-superheat-degree extracted steam, the externally-arranged steam cooler system provided by the utility model can obviously reduce the cost of equipment and the piping while improving the efficiency of a thermodynamic system; the rate of return on investment is improved, and the application range of an energy conservation and consumption reduction technology is widened.
Description
Technical field
The utility model relates to steam power plant, is specifically related to the outer steam cooler system in the steam power plant heat regenerative system.
Background technology
In the heat regenerative system in thermal power plant, to higher the drawing gas of the degree of superheat, usually join outer steam cooler to improve thermodynamic system efficiency.
For the large Turbo-generator Set of superheated steam amount, usually adopt full outer steam cooler system to water capacity as shown in Figure 1.Namely arrange external cooler 4 after final stage feed-water heater 3, and the feedwater of final stage feed-water heater 3 all enters outer steam cooler 4, and drawing gas through the cooled high degree of superheat of outer steam cooler 4 enters final stage feed-water heater 3 certain one-level feed-water heater or oxygen-eliminating device 2 or condensation water heater 1 before.
And for the little Turbo-generator Set of superheated steam amount, employing part as shown in Figure 2 is to the outer steam cooler system of water capacity usually.Namely arrange external cooler 4 after final stage feed-water heater 3, and the feedwater part of final stage feed-water heater 3 enters outer steam cooler 4, and the direct by-passing of another part draws gas through the cooled high degree of superheat of outer steam cooler 4 and enters final stage feed-water heater 3 certain one-level feed-water heater or oxygen-eliminating device 2 or condensation water heater 1 before to the rear water main of outer steam cooler 4.
Two kinds of existing systems all utilize the degree of superheat of steam, and the heating high-pressure feedwater improves the backheat amount, reach the purpose of energy-saving and emission-reduction, raising efficiency of thermal cycle.
In the system of prior art, the heated medium of external steaming cooler is high-pressure feed water, and pressure is very high.For example to present common ultra supercritical unit, the specified operating pressure of high-pressure feed water is more than 30MPa.g, and equipment and feed piping design pressure are more than 38MPa.g.Very high operation and design pressure cause that the device fabrication difficulty is large, cost is high, security of operation requires height, and the cost of piping (comprising pipeline, pipe fitting, valve etc.) is very high simultaneously, affects investment yield.
For much having put into operation but do not join the Turbo-generator Set of outer steam cooler, although know that joining outer steam cooler can improve thermodynamic system efficiency, energy-saving and cost-reducing, due to above reason, the prior art is promoted on a large scale.
The utility model content
The purpose of this utility model be for prior art systems pressure high cause investing high, relative yield is low, promote difficult shortcoming, by the relatively low new system of employing pressure, when improving thermodynamic system efficiency, the cost of reduction equipment and piping, increase return on investment, enlarge the range of application of energy conservation.
for achieving the above object, according to one side of the present utility model, outer steam cooler system in a kind of power plant heat regenerative system is provided, described heat regenerative system comprises multistage feed-water heater, deaerating heater, feed piping, and hydrophobic piping, described outer steam cooler system comprises outer steam cooler and steam piping, it is characterized in that: described outer steam cooler is arranged on the hydrophobic pipeline of feed-water heater and draw gas with the high degree of superheat of steam turbine by pipeline in its steam inlet is communicated with, described outer steam cooler is used for heating the hydrophobic of described feed-water heater.
Preferably, the hydrophobic outlet of described outer steam cooler is communicated with the steam inlet of described feed-water heater, hydrophobic be heated vaporization after, the steam of generation is drawn back described feed-water heater, heated feed water.
Preferably, the steam (vapor) outlet of described outer steam cooler is communicated with the steam inlet of the feed-water heater of prime, oxygen-eliminating device or condensation water heater, becomes feed-water heater, oxygen-eliminating device or the condensation water heater of supplying with described prime after the steam of low overheat after the high degree of superheat is drawn gas and is cooled.
Preferably, described outer steam cooler is arranged on hydrophobic pipeline between final stage feed-water heater and final stage feed-water heater previous stage feed-water heater, is used for the hydrophobic of heating final stage feed-water heater.
Preferably, described outer steam cooler is arranged on hydrophobic pipeline between arbitrary intergrade feed-water heater and this grade feed-water heater previous stage feed-water heater, is used for the hydrophobic of heated feed water heater.
Preferably, described outer steam cooler quantity is two-stage, after wherein one-level is arranged in the final stage feed-water heater, be used for heated feed water, and another grade is arranged on hydrophobic pipeline between arbitrary grade of feed-water heater and this grade feed-water heater previous stage feed-water heater, is used for heating the hydrophobic of described arbitrary grade of feed-water heater.
According on the other hand of the present utility model, a kind of power plant heat regenerative system also is provided, described heat regenerative system comprises multistage feed-water heater, deaerating heater, feed piping, hydrophobic piping, and outer steam cooler system, described outer steam cooler system comprises outer steam cooler and steam piping, wherein, described outer steam cooler is arranged on the hydrophobic pipeline of feed-water heater and draw gas with the high degree of superheat of steam turbine by pipeline in its steam inlet is communicated with, and described outer steam cooler is used for heating the hydrophobic of described feed-water heater.
In outer steam cooler of the present utility model system, the degree of superheat of utilizing the high degree of superheat to draw gas, lower hydrophobic of the pressure of heated feed water heater, hydrophobic be heated vaporization after, the steam that produces draws back final stage or a certain intergrade feed-water heater, reaches the purpose of indirect feedwater.System by existing outer steam cooler system, directly heating high-pressure feedwater compares with the degree of superheat of utilizing the high degree of superheat to draw gas, the utility model is when improving thermodynamic system efficiency, the cost of remarkable reduction equipment and piping, increase return on investment, enlarge the range of application of energy conservation.
In system configuration of the present utility model, the heated medium of external steaming cooler is the hydrophobic of feed-water heater, and pressure is relatively low.For example to present common ultra supercritical unit, the hydrophobic specified operating pressure of final stage feed-water heater is 9MPa.g approximately, lower pressure can reduce external steaming cooler device fabrication difficulty, reduces cost, improve safety in operation, the cost of carbonated drink piping (comprising pipeline, pipe fitting, valve etc.) significantly reduces simultaneously, finally increases return on investment.For example to 1 1000MW ultra supercritical thermal power generation unit, the equipment of outer steam cooler of the present utility model system and piping investment can be reduced to approximately 1,000 ten thousand yuan, to 1 1000MW ultra supercritical thermal power generation unit, than the equipment of existing outer steam cooler system and piping up to the approximately investment of 2,000 ten thousand yuan, can reduce the approximately investment of 1,000 ten thousand yuan.
Description of drawings
Fig. 1 is the system layout of an embodiment of outer steam cooler of the prior art system;
Fig. 2 is the system layout of another embodiment of outer steam cooler of the prior art system;
Fig. 3 illustrates the system layout according to the first embodiment of outer steam cooler of the present utility model system;
Fig. 4 illustrates the system layout according to the second embodiment of outer steam cooler of the present utility model system; And
Fig. 5 illustrates the system layout according to the 3rd embodiment of outer steam cooler of the present utility model system.
The specific embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is elaborated, in order to clearlyer understand the purpose of this utility model, characteristics and advantage.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and just for the connotation of technical solutions of the utility model is described.Herein, same or analogous parts indicate with identical Reference numeral.
In the utility model, the heat-transfer surface that term " outer steam cooler " refers to the heater that adopts degree of superheat higher steam can be divided into superheated steam cooling section, the saturated vapor section of condensing and hydrophobic cooling section, conventional superheated steam cooling section can be integrated in same heater with other heat exchanging segment, also the superheated steam cooling section partly can be branched away, make independently heat exchanger, this independently heat exchanger be called outer steam cooler.
Fig. 3 illustrates the system layout according to the first embodiment of outer steam cooler of the present utility model system.Outer steam cooler of the present utility model system is the part of steamer generating circulation system (heat regenerative system).As shown in Figure 3, heat regenerative system comprises feed-water heater 3, oxygen-eliminating device 2, condensation water heater 1 etc. mainly by heaters at different levels; Steam piping, hydrophobic piping, feed piping, condensate water piping; And outer steam cooler 4 forms.Outer steam cooler 4 is arranged on hydrophobic pipeline 6 between final stage feed-water heater and final stage feed-water heater previous stage feed-water heater, is used for the hydrophobic of heating final stage feed-water heater 3.Specifically, draw gas with the high degree of superheat and be communicated with in the steam inlet of outer steam cooler 4, steam (vapor) outlet is connected with the steam inlet of another grade feed-water heater 3, and the hydrophobic entrance of outer steam cooler 4 is connected with the hydrophobic outlet of final stage feed-water heater, hydrophobic be heated vaporization after, the steam that produces is drawn back top heater, heated feed water.
During work, the high degree of superheat is drawn gas by steam piping, is introduced into outer steam cooler 4, heats the hydrophobic of final stage feed-water heater 3.Become the steam of low overheat after the high degree of superheat is drawn gas and is cooled, supply with corresponding user (feed-water heater 3, oxygen-eliminating device 2, condensation water heater 1 or other steam user that comprise prime).The hydrophobic outer steam cooler that enters of final stage feed-water heater 3, after being heated vaporization, the steam of generation draws back final stage feed-water heater, heated feed water.If the hydrophobic amount of final stage feed-water heater is larger, also can guide to the prime feed-water heater and without outer steam cooler 4 with a part is hydrophobic.
Fig. 4 illustrates the system layout according to the second embodiment of outer steam cooler of the present utility model system.The difference part of the present embodiment and the first embodiment is that the high degree of superheat draws gas by outer steam cooler, heating intergrade feed-water heater 3 hydrophobic.Be to draw gas with the high degree of superheat and be communicated with in the steam inlet of outer steam cooler 4, steam (vapor) outlet is connected with the steam inlet of another grade feed-water heater 3, and the hydrophobic entrance of outer steam cooler 4 is connected with the hydrophobic outlet of a certain intergrade feed-water heater, hydrophobic be heated vaporization after, the steam that produces is drawn back this intergrade heater, heated feed water.
During work, the high degree of superheat is drawn gas by steam piping, is introduced into outer steam cooler 4, heats the hydrophobic of this intergrade feed-water heater 3.Become the steam of low overheat after the high degree of superheat is drawn gas and is cooled, supply with corresponding user (feed-water heater 3, oxygen-eliminating device 2, condensation water heater 1 or other steam user that comprise prime).The hydrophobic outer steam cooler that enters of this intergrade feed-water heater 3, after being heated vaporization, the steam of generation draws back this intergrade feed-water heater (or other grade feed-water heater), heated feed water.If the hydrophobic amount of this intergrade feed-water heater is larger, also can guide to the prime feed-water heater and without outer steam cooler 4 with a part is hydrophobic.
In addition, in the utility model, if the steam of high degree of superheat source is more, can only establishes the outer steam cooler of one-level or multistage outer steam cooler is set.Perhaps, if the steam of high degree of superheat source is more, also can add outer steam cooler of the present utility model in the existing system that conventional outer steam cooler has been set, as shown in Figure 5, to take full advantage of the degree of superheat of steam, improve efficiency of thermal cycle.
It is pointed out that the heater in heat regenerative system of the present utility model can be multistage, progression is not subjected to the restriction of the heat regenerative system shown in Fig. 3～5.The heater of heat regenerative system can be single-row, can be also biserial, and columns is not subjected to the restriction of the heat regenerative system shown in Fig. 3～5.The steam of the high degree of superheat can be one-level, can be also twin-stage or multistage, and progression is not subjected to the restriction of the heat regenerative system shown in Fig. 3～5.User through the low overheat steam after outer steam cooler can be feed-water heater, oxygen-eliminating device, condensation water heater or other steam user, and purposes is not subjected to the restriction of the heat regenerative system shown in Fig. 3～5.
In outer steam cooler of the present utility model system, the degree of superheat of utilizing the high degree of superheat to draw gas, lower hydrophobic of the pressure of heated feed water heater, hydrophobic be heated vaporization after, the steam that produces draws back final stage or a certain intergrade feed-water heater, reaches the purpose of indirect feedwater.System by existing outer steam cooler system, directly heating high-pressure feedwater compares with the degree of superheat of utilizing the high degree of superheat to draw gas, the utility model is when improving thermodynamic system efficiency, the cost of remarkable reduction equipment and piping, increase return on investment, enlarge the range of application of energy conservation.
In system configuration of the present utility model, the heated medium of external steaming cooler is the hydrophobic of feed-water heater, and pressure is relatively low.For example to present common ultra supercritical unit, the hydrophobic specified operating pressure of final stage feed-water heater is 9MPa.g approximately, lower pressure can reduce external steaming cooler device fabrication difficulty, reduces cost, improve safety in operation, the cost of carbonated drink piping (comprising pipeline, pipe fitting, valve etc.) significantly reduces simultaneously, finally increases return on investment.For example to 1 1000MW ultra supercritical thermal power generation unit, the equipment of outer steam cooler of the present utility model system and piping investment can be reduced to approximately 1,000 ten thousand yuan, to 1 1000MW ultra supercritical thermal power generation unit, than the equipment of existing outer steam cooler system and piping up to the approximately investment of 2,000 ten thousand yuan, can reduce the approximately investment of 1,000 ten thousand yuan.
In addition, the 10m H that has an appointment in water supply system of prior art outer steam cooler system
2The flow resistance of O, outer steam cooler of the present utility model system do not have corresponding flow resistance, flow smooth and easy, efficient is high.Simultaneously, than prior art outer steam cooler equipment is large, piping is larger, accounts for area large, outer steam cooler system equipment of the present utility model is less, piping is less, account for area little, the limited technological transformation project in place is had better applicability.
In addition, the outer steam cooler that the heat regenerative system of generating equipment is increased prior art need to improve feed temperature and improve cycle efficieny, can affect to a certain extent boiler operatiopn, increase outer steam cooler of the present utility model when having improved cycle efficieny feed temperature substantially do not change, the existing engineering that has put into operation is had better applicability.
Below described preferred embodiment of the present utility model in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present utility model, those skilled in the art can make various changes or modifications the utility model.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (7)
1. the outer steam cooler system in a power plant heat regenerative system, described heat regenerative system comprises multistage feed-water heater, deaerating heater, feed piping, and hydrophobic piping, described outer steam cooler system comprises outer steam cooler and steam piping, it is characterized in that: described outer steam cooler is arranged on the hydrophobic pipeline of feed-water heater and draw gas with the high degree of superheat of steam turbine by pipeline in its steam inlet is communicated with, and described outer steam cooler is used for heating the hydrophobic of described feed-water heater.
2. outer steam cooler according to claim 1 system, it is characterized in that: the hydrophobic outlet of described outer steam cooler is communicated with the steam inlet of described feed-water heater, hydrophobic be heated vaporization after, the steam of generation is drawn back described feed-water heater, heated feed water.
3. outer steam cooler according to claim 1 system, it is characterized in that: the steam (vapor) outlet of described outer steam cooler is communicated with the steam inlet of the feed-water heater of prime, oxygen-eliminating device or condensation water heater, becomes feed-water heater, oxygen-eliminating device or the condensation water heater of supplying with described prime after the steam of low overheat after the high degree of superheat is drawn gas and is cooled.
4. outer steam cooler according to claim 1 system, it is characterized in that: described outer steam cooler is arranged on hydrophobic pipeline between final stage feed-water heater and final stage feed-water heater previous stage feed-water heater, is used for the hydrophobic of heating final stage feed-water heater.
5. outer steam cooler according to claim 1 system, it is characterized in that: described outer steam cooler is arranged on hydrophobic pipeline between arbitrary intergrade feed-water heater and this grade feed-water heater previous stage feed-water heater, is used for the hydrophobic of heated feed water heater.
6. outer steam cooler according to claim 1 system, it is characterized in that: described outer steam cooler quantity is two-stage, after wherein one-level is arranged in the final stage feed-water heater, be used for heated feed water, and another grade is arranged on hydrophobic pipeline between arbitrary grade of feed-water heater and this grade feed-water heater previous stage feed-water heater, is used for heating the hydrophobic of described arbitrary grade of feed-water heater.
7. power plant heat regenerative system, described heat regenerative system comprises multistage feed-water heater, deaerating heater, feed piping, hydrophobic piping, and outer steam cooler system, described outer steam cooler system comprises outer steam cooler and steam piping, it is characterized in that: described outer steam cooler is arranged on the hydrophobic pipeline of feed-water heater and draw gas with the high degree of superheat of steam turbine by pipeline in its steam inlet is communicated with, and described outer steam cooler is used for heating the hydrophobic of described feed-water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320109802 CN203273855U (en) | 2013-03-11 | 2013-03-11 | Externally-arranged steam cooler system in regenerative system of power plant and regenerative system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320109802 CN203273855U (en) | 2013-03-11 | 2013-03-11 | Externally-arranged steam cooler system in regenerative system of power plant and regenerative system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203273855U true CN203273855U (en) | 2013-11-06 |
Family
ID=49504254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320109802 Withdrawn - After Issue CN203273855U (en) | 2013-03-11 | 2013-03-11 | Externally-arranged steam cooler system in regenerative system of power plant and regenerative system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203273855U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115349A (en) * | 2013-03-11 | 2013-05-22 | 中国电力工程顾问集团华东电力设计院 | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system |
| CN104990060A (en) * | 2015-07-24 | 2015-10-21 | 东方电气集团东方锅炉股份有限公司 | Passive protection device for steam cooler system |
| CN106369804A (en) * | 2016-08-31 | 2017-02-01 | 中节能科技投资有限公司 | High-effect heat regenerative system |
-
2013
- 2013-03-11 CN CN 201320109802 patent/CN203273855U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115349A (en) * | 2013-03-11 | 2013-05-22 | 中国电力工程顾问集团华东电力设计院 | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system |
| CN103115349B (en) * | 2013-03-11 | 2014-07-09 | 中国电力工程顾问集团华东电力设计院 | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system |
| CN104990060A (en) * | 2015-07-24 | 2015-10-21 | 东方电气集团东方锅炉股份有限公司 | Passive protection device for steam cooler system |
| CN106369804A (en) * | 2016-08-31 | 2017-02-01 | 中节能科技投资有限公司 | High-effect heat regenerative system |
| CN106369804B (en) * | 2016-08-31 | 2019-05-24 | 中节能科技投资有限公司 | High-effect heat regenerative system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102116469B (en) | Water supply and drainage system for medium-pressure heater of power plant | |
| CN204987536U (en) | High temperature heating device based on lithium bromide absorption heat pump unit | |
| CN202403258U (en) | Water-supply steam-extraction regenerative heating system of coal-fired power plant | |
| CN104763485A (en) | Thermodynamic system of concurrent heating ultra-high pressure/subcritical backpressure heat supply unit | |
| CN103836608B (en) | Low pressure drain cooler heat regenerative system | |
| CN204987534U (en) | Solar energy vortex refrigerating system | |
| CN203273855U (en) | Externally-arranged steam cooler system in regenerative system of power plant and regenerative system | |
| CN104061027B (en) | The high temperature steam-extracting cooling system of Double reheat steam turbine thermodynamic system | |
| CN103115349B (en) | Externally arranged steam cooler system in heat regenerative system of power plant and heat regenerative system | |
| CN102809142B (en) | Heat recovery system for secondary reheating unit in power plant and power plant | |
| CN104457297A (en) | Sintering waste heat recovery method and system | |
| CN204787425U (en) | Prepare hydrothermal circulation system of high temperature | |
| CN203499741U (en) | Backpressure steam extraction small steam turbine thermal system coaxially arranged with primary reheating main steam turbine set | |
| CN202546728U (en) | External tandem type steam cooler in heat regenerative system of large thermal power plant | |
| CN203797629U (en) | Low-pressure drain cooler regenerative system and generator set | |
| CN204786336U (en) | External steam cooling ware connected system in steam turbine heat regenerative system | |
| CN102818252B (en) | Regenerative system of power station single reheating set and power station | |
| CN102374514B (en) | Flue gas waste heat based dual-pressure power generation system | |
| CN203978523U (en) | The high temperature steam-extracting cooling system of Double reheat steam turbine thermodynamic system | |
| CN202915337U (en) | Regenerative system and generator of power plant secondary reheating unit | |
| CN210069822U (en) | High-pressure high-temperature condensed water flash evaporation recovery system | |
| CN202141025U (en) | Double-pressure smoke waste heat generating system | |
| CN202349998U (en) | Condensed water and water supply deoxidizing system for thermal power plant | |
| CN202915338U (en) | Regenerative system and generator of power plant primary reheating unit | |
| CN207162510U (en) | A kind of waste heat boiler afterbody heat exchanger system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20140709 |
|
| RGAV | Abandon patent right to avoid regrant |