CN204113364U - The waste heat recovering device of lack of water cold area Direct Air-cooled Unit - Google Patents
The waste heat recovering device of lack of water cold area Direct Air-cooled Unit Download PDFInfo
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- CN204113364U CN204113364U CN201420296358.9U CN201420296358U CN204113364U CN 204113364 U CN204113364 U CN 204113364U CN 201420296358 U CN201420296358 U CN 201420296358U CN 204113364 U CN204113364 U CN 204113364U
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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
The utility model relates to the device that a kind of cooling medium airstrip reclaimed in power station air cooling tower walks heat, is specifically related to the waste heat recovering device of water shortage in north china cold area Direct Air-cooled Unit.Due to Northern Part of China lack of water, winter is very cold, and cold end corrosion easily occurs air preheater, so need to install heater additional thus the temperature of raising air preheater entrance air, but installs the Economy that heater can reduce again power station additional.For this reason, the hot air after radiators heat in air cooling tower is recycled and as primary heater, when hot air temperature reaches the temperature needed for air preheater, directly can be introduced air preheater by the utility model.When hot air temperature not yet reaches the temperature needed for air preheater, hot air in primary heater can be introduced secondary heater, but the load of secondary heater is lower, thus significantly reduce so that need not draw gas add hot air, improve the Economy of power station.
Description
Technical field
The utility model relates to energy technology field, is specifically related to the waste heat recovering device of a kind of lack of water cold area Direct Air-cooled Unit.
Background technique
People is many, and water is few, and distribution of water resources inequality is the fundamental realities of the country, the regimen of China.1/3 of China's current water resource of per capita not enough world per capita share, the whole nation year water deficit of normal time reaches billion cubic meter more than 500, the city lack of water to some extent of nearly 2/3rds.Along with socioeconomic fast development, China's water demand constantly increases, along with the arrival of population peak value, water resource of per capita also can decline further, in addition the adverse effect of Global climate change, within foreseeable period, the contradiction of supply and demand for the water resource will aggravate further.Thermal power plant is water consumption rich and influential family, by the water consumption ability of China's generator set, uses kilowatt-hour will water consumption 0.4-0.6 kg of water, and adopts Air-cooled Unit to can be good at addressing this problem, be down to minimum by the water consumption ability of power plant.
The effect of power station air cooling system uses air instead of water-cooled condensing system as the cold junction of thermal power plant steam turbine; adopt air cooling system compared with conventional humid-cool system; more than 3/4 can be economized on water; along with the attention further that country protects freshwater resources; power station air cooling system is applied gradually, and China will carry out more strict water-saving policy in " 12 " period.Meanwhile, China's thermoelectricity layout is by " three Norths " area concentration to scarcity of fresh water resources.This brings wide market development space by for power station air cooling system.
In the running of Direct Air-cooled Unit, air is as the cooling medium of Direct Air-cooled Unit, the latent heat of the steam discharge that steam turbine is discharged is absorbed by air cooling tower, steam discharge cooling is condensed into water, and absorb the air of steam discharge latent heat, but be directly discharged in air, the energy of this part hot air is not effectively utilised, and causes localized heat pollution.
Model utility content
In order to solve problems of the prior art, the purpose of this utility model is: for the feature of the northern area of China very cold, drought and water shortage, a kind of waste heat recovering device of Direct Air-cooled Unit is provided, thus reduces the coal consumption of unit generation, improve the full factory efficiency of power station.
In order to achieve the above object, the technological scheme that the utility model adopts is:
The waste heat recovering device of the Direct Air-cooled Unit that the utility model provides, comprise steam turbine 1, primary heater 2, induced draught fan 3, secondary heater 4, air preheater 5, condensate water tank 11, drain tank 12, temperature controller 14, safety check 15, air cooling tower 16 and extraction control valve 6, flow control valve a 7, steam discharge modulating valve 8, flow control valve b 9, flow control valve c 10, the exhaust vent of described steam turbine 1 is connected with the steam discharge entrance of described air cooling tower 16, steam discharge after Air flow sends into condensate water tank 11 with the form of water of condensation, the low pressure steam of described steam turbine 1 is connected by the steam inlet of extraction opening with described secondary heater 4, low pressure steam adds hot air by described secondary heater 4, this hot air sends into air preheater 5, cooled low pressure steam sends into drain tank 12 with hydrophobic form.It is characterized in that, described steam turbine 1 steam discharge enters dry Cooling heat radiator, and also comprise the induced draught fan 3 extracting hot air in air cooling tower 16, described induced draught fan 3 is arranged on the inside of air cooling tower 16, and described temperature controller 14 is arranged on the hot air outlet place of induced draught fan 3.In the winter of water shortage in north china cold, air preheater 5 or secondary heater 4 is sent into by the hot air after dry Cooling heat radiator heats by induced draught fan 3, the temperature of the hot air after dry Cooling heat radiator heating is detected: if the hot air temperature after primary heater 2 heats reaches the temperature needed for air preheater 5 by temperature controller 14, then directly hot air can be sent into air preheater 5, thus the primary heater 2 of air cooling tower instead of heater 13 completely; If the hot air temperature after air cooling tower 2 heats not yet reaches air preheater 5 and avoids the necessary temperature of cold end corrosion, then hot air is sent into the temperature that secondary heater 4 is heated to needed for air preheater 5 further, then send into air preheater 5, thus part instead of the effect that heater 13 adds hot air.
The low pressure steam import of described secondary heater 4 and the extraction opening connecting pipeline of steam turbine 1 are provided with extraction control valve 6.
The connecting pipeline of described induced draught fan 3 hot air outlet and secondary heater 4 air inlet is provided with flow control valve a 7.
The exhaust vent of described steam turbine 1 and the steam discharge entrance connecting pipeline of air cooling tower 16 are provided with steam discharge modulating valve 8.
The outlet of described induced draught fan 3 hot air and the connecting pipeline of air preheater 5 air intlet are provided with flow control valve b 9.
Described secondary heater 4 is provided with safety check 15 with the connecting pipeline of air preheater 5.
The outlet port of described induced draught fan 3 hot air is provided with temperature controller 14.
Described primary heater 2 hot air outlet place arranges bypass line, when the flow that air mass flow is comparatively large or air preheater 5 needs is less, can as required, be entered in external environment by unnecessary hot air by bypass duct.
Described bypass duct outlet port is provided with flow control valve c 10.
Compared to the prior art, the utility model has the following advantages:
1, the waste heat recovering device of Direct Air-cooled Unit that provides of the utility model, steam discharge is entered air cooling tower 16 by steam turbine 1, air absorbs the latent heat of steam discharge as cooling medium, collect air cooling tower 16 by induced draught fan 3 be disposed to the hot air of air and send into air preheater 5, efficiently utilize the heat energy taken away by air, thus reduce coal consumption, improve the full factory efficiency of power station.
2, the waste heat recovering device of Direct Air-cooled Unit that provides of the utility model, in the winter of water shortage in north china cold, when ambient temperature is lower, then need Cryogenic air to be heated to uniform temperature and send into air preheater 5, to prevent the cold end corrosion of air preheater 5, if the hot air temperature after dry Cooling heat radiator (also claiming " primary heater 2 ") heating reaches the temperature needed for air preheater 5, then directly hot air can be sent into air preheater 5, thus air cooling tower 16 instead of the effect that heater 13 adds hot air completely.If the hot air temperature after dry Cooling heat radiator heating not yet reaches the temperature needed for air preheater 5, then hot air is sent into the temperature that secondary heater 4 is heated to needed for air preheater 5 further, send into air preheater 5 again, but the heat load of secondary heater 4 more former heater 13 is low, thus part instead of the effect that heater 13 adds hot air, while ensure that identical generated energy and heating value, reduce the gross coal consumption rate of power station, improve the full factory efficiency of power station.
3, induced draught fan 3 described in the utility model effectively enhances the negotiability of air in air cooling tower, hot air is taken away by induced draught fan 3, cool air in surrounding environment is more prone to enter air cooling tower and carries out heat exchange, further increase the heat dissipation potential of air cooling tower, thus further increase the full factory efficiency of power station.
Accompanying drawing explanation
Fig. 1 is the system schematic of prior art Direct Air-cooled Unit.
Fig. 2 is the system schematic of the waste heat recovering device of the utility model north water deficit area Direct Air-cooled Unit.
In figure, 1-steam turbine; 2-primary heater; 3-induced draught fan; 4-secondary heater; 5-air preheater; 6-extraction control valve; 7-flow control valve a; 8-steam discharge modulating valve; 9-flow control valve b; 10-flow control valve c; 11-condensate water tank; 12-drain tank; 13-heater; 14-temperature controller; 15-safety check; 16-air cooling tower.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As Fig. 1; prior art installs the Direct Air-cooled Unit of heater additional; be suitable for water shortage in north china and ambient temperature lower ground district; because ambient temperature is lower; in order to protect air preheater 5 not by cold end corrosion; need the steam heating air being extracted steam turbine 1 by heater 13; but adopt high-grade steam heating air must reduce the Economy of power plant by heater 13; air after heating sends into air preheater 5, sends into drain tank 12 after steam cooling with hydrophobic form.And the steam discharge of steam turbine 1 enters the radiator of air cooling tower, condensate water tank 11 is sent into the form of water of condensation after the cooling of cooling medium air, and be vented directly in air with the air of a large amount of heat energy, this part heat energy is not only effectively utilised, and causes serious localized heat pollution.
As Fig. 2, the waste heat recovering device of the utility model Direct Air-cooled Unit, comprise steam turbine 1, primary heater 2, induced draught fan 3, secondary heater 4, air preheater 5, condensate water tank 11, drain tank 12, temperature controller 14, safety check 15, air cooling tower 16 and extraction control valve 6, flow control valve a 7, steam discharge modulating valve 8, flow control valve b 9, flow control valve c 10, the exhaust vent of described steam turbine 1 is connected with the steam discharge entrance of described air cooling tower 16, steam discharge after Air flow sends into condensate water tank 11 with the form of water of condensation, the low-pressure pumping steam of described steam turbine 1 is connected with the steam inlet of described secondary heater 4 by low-pressure pumping steam mouth, low-pressure pumping steam adds hot air by described secondary heater 4 and by pipeline, hot air is sent into air preheater 5, cooled draw gas with hydrophobic form send into drain tank 12.Described steam turbine 1 steam discharge is entered air cooling tower 16, and it is inner that described induced draught fan 3 is arranged on air cooling tower 16, by induced draught fan 3, the hot air in air cooling tower 16 sent into air preheater 5 or secondary heater 4.The temperature of the hot air after dry Cooling heat radiator heating is detected by temperature controller 14, if the hot air temperature after air cooling tower 16 heats reaches the temperature needed for air preheater 5, then directly hot air can be sent into air preheater 5, thus air cooling tower instead of heater 13 completely.If the hot air temperature after air cooling tower 16 heats not yet reaches the temperature needed for air preheater 5, then hot air being sent into secondary heater 4, to be heated to air preheater 5 further temperature required, send into air preheater 5 again, thus part instead of heater 13.So, the new system that the utility model adopts is more energy-conservation compared with original system, and its Economy comprises two-part: 1, effectively reclaim exhaust steam heat; If 2 primary heater 2 substitute heater 13, then do not need the steam extracting high-quality, significantly energy-conservation; If 3 primary heater 2 Some substitute warm up separating device 13, because the heat load of secondary heater reduces, then decrease high pressure extraction or substitute high pressure extraction with low-pressure pumping steam, also save a large amount of heat energy equally.
As Fig. 2, the low pressure steam import of described secondary heater 4 and the extraction opening connecting pipeline of steam turbine 1 are provided with extraction control valve 6, the connecting pipeline of described induced draught fan 3 hot air outlet and secondary heater 4 air inlet is provided with flow control valve a 7, the exhaust vent of described steam turbine 1 and the steam discharge entrance connecting pipeline of air cooling tower 16 are provided with steam discharge modulating valve 8, the outlet of described induced draught fan 3 hot air and the connecting pipeline of air preheater 5 air intlet are provided with flow control valve b 9, described bypass duct outlet port is provided with flow control valve c 10, described secondary heater 4 is provided with safety check 15 with air preheater 5 connecting pipeline.
Extraction control valve in above-mentioned connecting tube, flow control valve, steam discharge modulating valve, can regulate accordingly according to uninterrupted and actual conditions.
As Fig. 2, described primary heater 2 hot air outlet place arranges bypass line, when the air mass flow that air mass flow is comparatively large or air preheater 5 needs is less, can as required, the flow control valve c 10 be provided with by bypass duct by unnecessary hot air discharged in external environment.
The power-economizing method of the waste heat recovering device of the utility model north water deficit area Direct Air-cooled Unit is as follows:
1, when when the winter of cold, ambient temperature was lower, then need Cryogenic air to be heated to uniform temperature and send into air preheater 5, detected the temperature of the hot air after dry Cooling heat radiator heating by temperature controller 14.If the hot air temperature after air cooling tower 16 heats reaches the temperature needed for air preheater 5, then close extraction control valve 6 and air flow rate adjustment valve a 7, hot air after can directly being heated by dry Cooling heat radiator sends into air preheater 5, the uninterrupted of air preheater 5 air inlet is controlled by air flow rate adjustment valve b 9, if air flow rate adjustment valve c10 can be opened when air mass flow is comparatively large or needed for air preheater 5, flow is less, discharge section hot air, now, air cooling tower 16 instead of the effect that former heater 13 adds hot air completely.If the hot air temperature after air cooling tower 16 heats not yet reaches the temperature needed for air preheater 5, then need to open extraction control valve 6 and air flow rate adjustment valve a 7, close air flow rate adjustment valve b 9 simultaneously, the temperature needed for air preheater 5 is heated to further by the hot air after air cooling tower 16 heats by secondary heater 4, the uninterrupted of air preheater 5 air inlet can be controlled, if flow control valve c 10 can be opened when air mass flow is comparatively large or needed for air preheater 5, flow is less, discharge section hot air, thus air cooling tower 16 part instead of heater 13, significantly can reduce the gross coal consumption rate of power station, improve the full factory efficiency of power station.
2, when when other seasons, ambient temperature was higher, ambient air does not need heating, when just can meet the temperature that air preheater 5 avoids needed for cold end corrosion, in order to make full use of cooling medium air in air cooling tower 16 with a large amount of heat energy, the utility model is collected by induced draught fan and hot air is directly sent into air preheater 5, close extraction control valve 6 and air flow rate adjustment valve a 7 simultaneously, open air flow rate adjustment valve b 9, the uninterrupted of air preheater 5 air inlet is controlled by air flow rate adjustment valve b 9, if flow control valve c 10 can be opened when air mass flow is comparatively large or needed for air preheater 5, flow is less, discharge section hot air, so, improve the temperature of air preheater 5 entrance, reduce coal consumption, improve the full factory efficiency of power station.
Claims (9)
1. the waste heat recovering device of Direct Air-cooled Unit, comprise steam turbine (1), primary heater (2), induced draught fan (3), secondary heater (4), air preheater (5), and extraction control valve (6), flow control valve a (7), steam discharge modulating valve (8), flow control valve b (9), flow control valve c (10), condensate water tank (11), drain tank (12), temperature controller (14), safety check (15), air cooling tower (16), the exhaust vent of described steam turbine (1) is connected with described air cooling tower (16), steam discharge after Air flow sends into condensate water tank (11) with the form of water of condensation, the low pressure steam of described steam turbine (1) is connected with the steam inlet of described secondary heater (4) by low pressure steam-expelling port, low pressure steam is added hot air further by described secondary heater (4) and is sent into air preheater (5), cooled low pressure steam sends into drain tank (12) with hydrophobic form, it is characterized in that, described steam turbine (1) steam discharge introduces the radiator of air cooling tower, ambient air through described radiators heat be hot air, this radiator also can be referred to as primary heater (2), also comprise the induced draught fan (3) extracting air cooling tower (16) interior hot air, described induced draught fan (3) is arranged on air cooling tower inside, in the winter of water shortage in north china cold, by induced draught fan (3), the hot air heated through primary heater (2) in air cooling tower (16) is sent into air preheater (5) or secondary heater (4), thus partly or entirely replace heater, reduce unit generation coal consumption, improve power station energy conversion efficiency.
2. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, is characterized in that: the connecting pipeline of the low pressure steam import of secondary heater (4) and the extraction opening of steam turbine (1) is provided with extraction control valve (6).
3. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, is characterized in that: the connecting pipeline of induced draught fan (3) hot air outlet and secondary heater (4) entrance is provided with flow control valve a (7).
4. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, is characterized in that: the connecting pipeline of the exhaust vent of steam turbine (1) and the steam discharge entrance of air cooling tower (16) is provided with steam discharge modulating valve (8).
5. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, is characterized in that: the outlet of induced draught fan (3) hot air and the connecting pipeline of air preheater (5) air intlet are provided with flow control valve b (9).
6. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, it is characterized in that: primary heater (2) hot air outlet place arranges bypass line, when air mass flow is larger, by bypass duct, unnecessary hot air can be entered in external environment.
7. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, it is characterized in that: described temperature controller (14) is arranged on induced draught fan (3) hot air outlet place, detected the temperature of the hot air after dry Cooling heat radiator heating by temperature controller (14).
8. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, it is characterized in that: described secondary heater (4) is provided with safety check (15) with the connecting tube of air preheater (5), when secondary heater (4) quits work, the hot air reflow after preventing primary heater (2) from heating is to secondary heater (4).
9. the waste heat recovering device of Direct Air-cooled Unit according to claim 1, it is characterized in that: the temperature being detected the hot air after dry Cooling heat radiator heating by temperature controller (14), if the hot air temperature after primary heater (2) reaches the temperature needed for air preheater (5), then directly hot air can be sent into air preheater (5), if the hot air temperature after primary heater (2) not yet reaches the temperature that air preheater (5) is avoided needed for cold end corrosion, then hot air is sent into the temperature that secondary heater (4) is heated to needed for air preheater (5) further.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420296358.9U CN204113364U (en) | 2014-05-29 | 2014-05-29 | The waste heat recovering device of lack of water cold area Direct Air-cooled Unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420296358.9U CN204113364U (en) | 2014-05-29 | 2014-05-29 | The waste heat recovering device of lack of water cold area Direct Air-cooled Unit |
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| CN204113364U true CN204113364U (en) | 2015-01-21 |
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| CN201420296358.9U Expired - Fee Related CN204113364U (en) | 2014-05-29 | 2014-05-29 | The waste heat recovering device of lack of water cold area Direct Air-cooled Unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016416A (en) * | 2016-05-23 | 2016-10-12 | 华北电力大学 | Boiler smoke and steam turbine exhaust coupled high-back-pressure combined heat and power generation system |
| CN106197065A (en) * | 2016-08-31 | 2016-12-07 | 吉林省电力科学研究院有限公司 | A kind of Direct Air-Cooled tower residual heat using device |
| CN106225005A (en) * | 2016-08-31 | 2016-12-14 | 吉林省电力科学研究院有限公司 | A kind of Direct Air-Cooled tower waste heat circulation system |
| CN107152316A (en) * | 2017-07-13 | 2017-09-12 | 中国能源建设集团湖南省电力设计院有限公司 | A kind of gradient utilization system of steam energy |
| CN111043875A (en) * | 2019-08-26 | 2020-04-21 | 华北电力大学 | System for recycling hot air in cooling tower between power station |
| CN114911291A (en) * | 2022-05-07 | 2022-08-16 | 深圳云存科技有限公司 | Intelligent embedded control system of hard disk air preheater |
-
2014
- 2014-05-29 CN CN201420296358.9U patent/CN204113364U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016416A (en) * | 2016-05-23 | 2016-10-12 | 华北电力大学 | Boiler smoke and steam turbine exhaust coupled high-back-pressure combined heat and power generation system |
| CN106016416B (en) * | 2016-05-23 | 2018-11-09 | 华北电力大学 | The high back pressure co-generation unit that boiler smoke is coupled with exhaust steam in steam turbine |
| CN106197065A (en) * | 2016-08-31 | 2016-12-07 | 吉林省电力科学研究院有限公司 | A kind of Direct Air-Cooled tower residual heat using device |
| CN106225005A (en) * | 2016-08-31 | 2016-12-14 | 吉林省电力科学研究院有限公司 | A kind of Direct Air-Cooled tower waste heat circulation system |
| CN107152316A (en) * | 2017-07-13 | 2017-09-12 | 中国能源建设集团湖南省电力设计院有限公司 | A kind of gradient utilization system of steam energy |
| CN107152316B (en) * | 2017-07-13 | 2023-08-22 | 中国能源建设集团湖南省电力设计院有限公司 | Cascade utilization system of steam energy |
| CN111043875A (en) * | 2019-08-26 | 2020-04-21 | 华北电力大学 | System for recycling hot air in cooling tower between power station |
| CN114911291A (en) * | 2022-05-07 | 2022-08-16 | 深圳云存科技有限公司 | Intelligent embedded control system of hard disk air preheater |
| CN114911291B (en) * | 2022-05-07 | 2023-12-19 | 深圳市联众长信科技有限公司 | Intelligent embedded control system of hard disk air preheater |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20150529 |
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| EXPY | Termination of patent right or utility model |