CN201650390U - A device capable of reducing condensation loss of steam turbine exhaust in a power plant - Google Patents
A device capable of reducing condensation loss of steam turbine exhaust in a power plant Download PDFInfo
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- CN201650390U CN201650390U CN2010201517987U CN201020151798U CN201650390U CN 201650390 U CN201650390 U CN 201650390U CN 2010201517987 U CN2010201517987 U CN 2010201517987U CN 201020151798 U CN201020151798 U CN 201020151798U CN 201650390 U CN201650390 U CN 201650390U
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- 238000009833 condensation Methods 0.000 title claims abstract description 32
- 230000005494 condensation Effects 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000003245 coal Substances 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 35
- 238000007789 sealing Methods 0.000 description 7
- 206010009866 Cold sweat Diseases 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010977 unit operation Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- 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
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Abstract
本实用新型涉及一种发电厂用的节能装置，尤其是涉及一种能降低发电厂汽轮机排汽冷凝损失的装置，包括通过管道依次相连的混合式凝汽器、凝结水再循环水泵、凝结水泵，其特征在于：在上述混合式凝汽器和凝结水再循环水泵之间连有一低温空气预热器，低温空气预热器下部通过管道与锅炉送风机、上部通过管道与锅炉空气预热器相连；本实用新型结构独特、可以降低锅炉的发电煤耗、提高了火力发电厂的整体经济效率、使发电厂总体热能利用率提高。
The utility model relates to an energy-saving device for a power plant, in particular to a device capable of reducing the condensation loss of steam turbine exhaust in a power plant, comprising a hybrid condenser, a condensed water recirculation pump, and a condensed water pump connected in sequence through pipelines , characterized in that: a low-temperature air preheater is connected between the above-mentioned hybrid condenser and the condensate recirculation pump, the lower part of the low-temperature air preheater is connected to the boiler blower through pipes, and the upper part is connected to the boiler air preheater through pipes ; The utility model has a unique structure, can reduce the coal consumption of the boiler for power generation, improves the overall economic efficiency of the thermal power plant, and improves the overall thermal energy utilization rate of the power plant.
Description
Technical field
The utility model relates to the energy saving device that a kind of power station is used, and especially relates to a kind of device that can reduce power station turbine discharge condensation loss.
Background technique
According to the type of cooling difference of thermal power plant steam turbine afterbody discharge exhaust steam, be clammy unit and Air-cooled Unit generally, and Air-cooled Unit is divided into Direct Air-cooled Unit and indirect air cooling unit with the thermoelectric generator component.Humid-cool system utilizes circulating water cooling exhaust steam, reaches the purpose of cooling circulating water again by circulating water and air direct heat transfer.Indirect air cooling system then is that circulating water is airtight, and air and circulating water indirect heat exchange reach the cooling purpose.Direct air cooling system is simplified circulation, utilizes the air cooling island that steam turbine afterbody steam discharge is directly carried out totally-enclosed cooling.Thermal power plant's water consumption is very big, and the restraining factors that the problem of water has often become construction, developed power industry are had under a lot of situations with water yield decision power plant capacity.Clammy unit generation water consumption is 3.84kg/kwh, and Air-cooled Unit electrical generation water consumption only is 0.8kg/kwh, and water-saving rate reaches 80%.Therefore, develop power industry in the area of " rich coal lack of water ", adopt Air cooling technique, building water-saving power plant is the approach of very effectively economizing on water.
The shortcoming of humid-cool system is at present: (1) cooling water has been taken away the turbine discharge heat of condensation, causes the very big waste of primary energy, makes the overall heat energy utilization ratio in power station have only 35%-40%, and the turbine discharge heat of condensation is not used appropriately; (2) a large amount of station service of waste is kept the circulating water pump work of cooling tower, the circulating water water system adopts usually and enlarges unit system, 2 unit circulating water outlets are provided with liaison tube, every unit is established 2 double speed circulating water pump, the circulating water pump operation condition in summer is a machine two pumps, the spring and autumn operating conditions is two machines, three pumps, and the winter operation operating mode is a machine one pump; (3) a large amount of water of waste, clammy unit generation water consumption is 3.84kg/kwh, cooling tower is the contact that utilizes water and air.
The shortcoming of air cooling system is at present: (1) thermal efficiency is low, major diameter axial-flow blower forced ventilation is all adopted in the direct air cooling system heat radiation at present, so not only consuming a large amount of station services (calculates with the 350MW supercritical unit, will be with 30 axial-flow blowers, each 132 kilowatts), and the low temperature radiation loss causes the very big waste of primary energy, makes the overall heat energy utilization ratio in power station have only 35%-40%, and the turbine discharge heat of condensation is not used appropriately; When (2) hot blast refluxed power plant's operation again, the hot gas that cool air is discharged by radiator rose, and presents the plume situation.When strong wind from the stove after-blow to the platform radiator, the wind speed degree exceeds 8m/s, the plume situation is wanted destroyed and hot blast occurred and reflux.Blast was below the steel platform afterwards by stove for the hot gas upward flow, and such hot blast is sucked by blower fan again, the recirculation of form hot blast;
(3) noise in recent years, domestic direct air cooling power station is serious day by day to the noise that blower fan produced, according to the fan noise sound pressure level of three class standards requirement in environmental protection standard industrial region at distance air cooling condenser platform 150m place, must not surpass 65dB (A) daytime, and must not surpass 55dB (A) night.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of structure uniqueness is provided, can reduce boiler gross coal consumption rate, improved the macroeconomic efficient in thermal power plant, the device that can reduce power station turbine discharge condensation loss that the overall heat energy utilization ratio in power station is improved.
The utility model is realized in the following way:
A kind of device that can reduce power station turbine discharge condensation loss, comprise the direct-contact type condenser, water of condensation recirculation water pump, the condensate pump that link to each other successively by pipeline, it is characterized in that: be connected with a low-temperature air preheater between above-mentioned direct-contact type condenser and water of condensation recirculation water pump, the low-temperature air preheater bottom links to each other with boiler air preheater by pipeline with boiler fan, top by pipeline;
Be provided with low-temperature air preheater water side outlet between described low-temperature air preheater and the direct-contact type condenser, and be provided with low-temperature air preheater water side entrance between the described water of condensation recirculation water pump.
The utility model has following effect:
1) structure uniqueness: the device that the utility model provides is exported to the boiler air preheater ingress at existing boiler fan a low-temperature air preheater is installed, and utilizes part water of condensation in the turbine condenser to come the mechanical wind of heating boiler gas fan.This process is to utilize part water of condensation in the turbine condenser to come the mechanical wind of heating boiler gas fan, is equivalent to give boiler with the recycling of turbine discharge heat of condensation.The raising of boiler wind pushing temperature can reduce the gross coal consumption rate of boiler, has improved the macroeconomic efficient in thermal power plant, has also solved the heated surface at the end of boiler cold end corrosion simultaneously, makes the overall heat energy utilization ratio in power station reach 60%-65%; Platform water of condensation recirculating pump is set in the vapour condenser bottom, part water of condensation in the vapour condenser extracted out after low-temperature air preheater utilizes the mechanical air cooling of boiler fan, sends vapour condenser back to, with the spray mode with make the steam turbine exhaust condense into water after the steam turbine exhaust fully mixes; The gas preheater inlet boiler of feeding burning that the mechanical wind of boiler fan is sent into boiler after by the low-temperature air preheater heat temperature raising again utilizes.
2) promptly be fit to the cooling system that clammy unit also is fit to the indirect air cooling unit: the device that the utility model provides is for the cooling system of clammy unit, because circulating water temperature cools off at the surface heat exchanger of sealing, thereby can reduce the flow velocity of circulating water, save the station service power consumption rate of pump, because the temperature of circulating water is cooled off at the surface heat exchanger of sealing, thereby can reduce the contact of water and air, reduce the waste of water in the evaporation process; Cooling system for the indirect air cooling unit: because circulating water temperature cools off at the surface heat exchanger of sealing, thereby can reduce the force ventilated flow velocity of air cooling island axial-flow blower, saved station service power consumption rate, because the temperature of circulating water is cooled off at the surface heat exchanger of sealing, thereby can reduce the force ventilated flow velocity of air cooling island axial-flow blower, reduced the noise of air cooling island axial-flow blower, since the surface heat exchanger of a large amount of hot blasts by sealing enter boiler internal combustion-supporting after, arrange to atmosphere from the smokestack of boiler, thereby avoided hot blast to reflux again.
3) also suitable cooling system for Direct Air-cooled Unit: the device that the utility model provides is because the steam turbine afterbody is discharged the surface heat exchanger cooling that the exhaust steam temperature has been sealed, thereby can reduce the force ventilated flow velocity of air cooling island axial-flow blower, saved station service power consumption rate, because discharging the exhaust steam temperature, cools off the steam turbine afterbody at the surface heat exchanger of sealing, thereby can reduce the force ventilated flow velocity of air cooling island axial-flow blower, reduced the noise of air cooling island axial-flow blower, since the surface heat exchanger of a large amount of hot blasts by sealing enter boiler internal combustion-supporting after, arrange to atmosphere from the smokestack of boiler, thereby avoided hot blast to reflux again.
4) can save the cooling medium of vapour condenser, improved the macroeconomic efficient in thermal power plant, make the overall heat energy utilization ratio in power station reach 60%-65%: the temperature after low-temperature air preheater is by the mechanical air cooling of boiler fan of the part water of condensation in the device turbine condenser that the utility model provides reduces and to return in the vapour condenser, with the spray mode with make the steam turbine exhaust condense into water after the steam turbine exhaust fully mixes.This process is to utilize boiler air-supply cooling condensing water temperature, return in the turbine condenser with the spray mode with make the steam turbine exhaust condense into water after the steam turbine exhaust fully mixes to cool off the steam turbine exhaust, can save the cooling medium of vapour condenser, improved the macroeconomic efficient in thermal power plant, made the overall heat energy utilization ratio in power station reach 60%-65%.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
A kind of device that can reduce power station turbine discharge condensation loss, comprise the direct-contact type condenser 1 that links to each other successively by pipeline, water of condensation recirculation water pump 2, condensate pump 8, as shown in Figure 1: between above-mentioned direct-contact type condenser 1 and water of condensation recirculation water pump 2, be connected with a low-temperature air preheater 3, low-temperature air preheater 3 bottoms are by pipeline and boiler fan 4, top links to each other with boiler air preheater 5 by pipeline, between described low-temperature air preheater 3 and direct-contact type condenser 1, be provided with low-temperature air preheater water side outlet 7, and be provided with low-temperature air preheater water side entrance 6 between the described water of condensation recirculation water pump 2.
As shown in Figure 1: the part water of condensation in the direct-contact type condenser 1 is boosted through water of condensation recirculation water pump 2 and is got to low-temperature air preheater water side entrance 6, through low-temperature air preheater 3 with from the cold wind surface heat exchanging of boiler fan 4 after temperature descend, again through low-temperature air preheater water side outlet 7 get back in the direct-contact type condenser 1 with the spray mode with make the steam turbine exhaust condense into water after the steam turbine exhaust fully mixes, another part water of condensation normally arrives condensate pump 8 and recycles; Cold wind from boiler fan 4 enters boiler air preheater 5 after heating up after low-temperature air preheater 3 and the heat exchange of water of condensation surface-type.
This system is fit to the energy-conserving and emission-cutting technology transformation of existing clammy unit; Engineered cost is low, only needs to increase a surface-type heat exchanger of installation and a water of condensation recirculation water pump; Effect is obvious, can save circulating water in a large number, reduces the drain evaporation of circulating water in a large number, the boiler air-supply heats up through low-temperature air preheater heating back in addition, reduce gross coal consumption rate, also solved the heated surface at the end of boiler cold end corrosion simultaneously, make the overall heat energy utilization ratio in power station reach 60%-65%; The operational safety performance height can add bypath system during installation, the convenient boiler low-temperature air preheater that overhauls in unit operation.
This system is fit to the energy-conserving and emission-cutting technology transformation of existing indirect air cooling unit, also can be used as the design proposal of newly built construction.Engineered cost is low, and effect is obvious, can reduce the flow velocity of circulating water in a large number, saves station service in a large number, reduces gross coal consumption rate, has also solved the heated surface at the end of boiler cold end corrosion simultaneously, makes the overall heat energy utilization ratio in power station reach 60%-65%; The operational safety performance height can add bypath system during installation, conveniently overhauls in unit operation.
This system is fit to the energy-conserving and emission-cutting technology transformation of existing Direct Air-cooled Unit, also can be used as the design proposal of newly built construction.Engineered cost is low, effect is obvious, after the turbine low pressure cylinder exhaust mixes cooling through low-temperature condensate, most of steam can condense, small part not condensing vapour enters the air cooling island and saves station service in a large number through connecting tube 3, reduce gross coal consumption rate, also solved the heated surface at the end of boiler cold end corrosion simultaneously, make the overall heat energy utilization ratio in power station reach 60%-65%; The operational safety performance height can add bypath system during installation, conveniently overhauls in unit operation.
Claims (2)
1. one kind can be reduced the device that power station turbine discharge condensation is lost, comprise the direct-contact type condenser (1), water of condensation recirculation water pump (2), the condensate pump (8) that link to each other successively by pipeline, it is characterized in that: be connected with a low-temperature air preheater (3) between above-mentioned direct-contact type condenser (1) and water of condensation recirculation water pump (2), low-temperature air preheater (3) bottom links to each other with boiler air preheater (5) by pipeline with boiler fan (4), top by pipeline.
2. the device that can reduce power station turbine discharge condensation loss as claimed in claim 1, it is characterized in that: be provided with low-temperature air preheater water side outlet (7) between described low-temperature air preheater (3) and the direct-contact type condenser (1), and be provided with low-temperature air preheater water side entrance (6) between the described water of condensation recirculation water pump (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201517987U CN201650390U (en) | 2010-04-07 | 2010-04-07 | A device capable of reducing condensation loss of steam turbine exhaust in a power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201517987U CN201650390U (en) | 2010-04-07 | 2010-04-07 | A device capable of reducing condensation loss of steam turbine exhaust in a power plant |
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| CN201650390U true CN201650390U (en) | 2010-11-24 |
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| CN2010201517987U Expired - Fee Related CN201650390U (en) | 2010-04-07 | 2010-04-07 | A device capable of reducing condensation loss of steam turbine exhaust in a power plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392702A (en) * | 2011-07-20 | 2012-03-28 | 李德军 | Fully enclosed circulating water system using air cooler to recover latent heat of condensing unit |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN105221224A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | A kind of turbine discharge residual neat recovering system |
| CN115614727A (en) * | 2020-11-12 | 2023-01-17 | 深圳市博众节能工程技术有限公司 | Method for improving economical efficiency of thermal generator set |
-
2010
- 2010-04-07 CN CN2010201517987U patent/CN201650390U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392702A (en) * | 2011-07-20 | 2012-03-28 | 李德军 | Fully enclosed circulating water system using air cooler to recover latent heat of condensing unit |
| CN102392702B (en) * | 2011-07-20 | 2014-09-03 | 李德军 | Totally-enclosed circulating water system for recovering latent heat of condensing unit by using air cooler |
| CN105221224A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | A kind of turbine discharge residual neat recovering system |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN115614727A (en) * | 2020-11-12 | 2023-01-17 | 深圳市博众节能工程技术有限公司 | Method for improving economical efficiency of thermal generator set |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120407 |