CN103628939B - A kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN - Google Patents
A kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN Download PDFInfo
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- CN103628939B CN103628939B CN201310621111.XA CN201310621111A CN103628939B CN 103628939 B CN103628939 B CN 103628939B CN 201310621111 A CN201310621111 A CN 201310621111A CN 103628939 B CN103628939 B CN 103628939B
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Abstract
The invention discloses a kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN, described method is based on the Direct Air-cooled Unit coexisted in power station and wet type cooling unit, heat exchanger is had additional in the steam exhaust device of Direct Air-cooled Unit, the feedwater of wet type cooling unit is caused on the heat exchanger arranged in Direct Air-cooled Unit steam exhaust device and circulate, utilize the feedwater of the high-temperature steam heating wet type cooling unit in Direct Air-cooled Unit steam exhaust device.The present invention rationally, effectively, reliably make use of the waste heat of Direct Air-cooled Unit, reduce the energy consumption of Direct Air-cooled Unit and wet type cooling unit, add exerting oneself of wet type cooling unit, significantly reduce the cost of electricity-generating of power station, energy-conserving and environment-protective, income significantly and reliably improve.
Description
Technical field
The present invention relates to the operation method of steam turbine set, specifically a kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN.
Background technique
At present, the measure that utilizes about the weary heat of steam turbine set cold junction steam discharge is mainly the heating of Heating Period heat supply network, reduces the loss of the weary heat of steam turbine set cold junction steam discharge, improve power plant thermal efficiency with this.But, the weary heat utilization of this steam turbine set realizes based on the existence of heat demand, if without the pure electric turbine group of heat demand, then for want of demand object and the weary heat of the cold junction of steam turbine set can not be utilized, the cold junction exhaust steam of steam turbine set is caused to be wasted, the thermal efficiency of power plant is low, adds cost of electricity-generating.
Direct Air-cooled Unit and wet type cooling unit belong to the above-mentioned pure electric turbine group without heat demand.So-called Direct Air-cooled Unit refers to that the steam discharge of steam turbine set directly carrys out condensation with air, heat exchange is carried out between air and steam, its technological process is: steam turbine set cold junction steam discharge drains in outdoor air cooling condenser by steam exhaust device (being generally Large Diameter Pipeline blow-off line), axial flow cooling blower makes air flow through the outer surface of air cooling condenser, steam discharge is condensed into water, and water of condensation sends boiler by pumping back to after the heating such as final stage low-pressure heater.So-called wet type cooling unit refers to that the steam discharge of steam turbine set carries out condensation by the cooling water of circulation, its technological process is: steam turbine set cold junction steam discharge causes clammy tower, recirculated cooling water spray on clammy tower and under, with the steam generation heat exchange of upwards flowing until condense into water, containing a large amount of recirculated cooling waters in water of condensation, temperature is very low, and water of condensation sends boiler by pumping back to after the heating such as final stage low-pressure heater.
Can clearly be found out by the technological process of Direct Air-cooled Unit: the vapor (steam) temperature draining into air cooling condenser through steam exhaust device is very high, the heat load of air cooling condenser is high, steam condensation efficiency is low, need the mechanical efficiency strengthening axial flow cooling blower, air flow amount is increased to cool air cooling condenser with this, this not only makes a large amount of waste heats without utilizing of steam turbine set cold junction steam discharge, directly enter in air, cause waste and serious thermo-pollution is caused to air, be unfavorable for energy-conserving and environment-protective, and the high efficiency acting of axial flow cooling blower certainly will cause the power consumption of power plant significantly to increase, add operating cost.Can clearly be found out by the technological process of wet type cooling unit: the feed temperature formed after clammy tower condensation is very low, need increase to draw gas to heat feedwater at final stage low-pressure heater place, feedwater after heating is sent into high-pressure heater again and is heated, this not only makes the high-quality steam of wet type cooling unit cause waste, reduce exerting oneself of wet type cooling unit, and increase the energy consumption of wet type cooling unit, operating cost is generally increased by a large.
In sum, in view of Direct Air-cooled Unit and wet type cooling unit belong to the pure electric turbine group without heat demand, the technology to the weary heat utilization of its cold junction steam discharge was also there is not in prior art, their the weary heat of cold junction steam discharge can not be utilized, continue waste, the thermal efficiency of power plant is low, and cost of electricity-generating is high.
Summary of the invention
The object of the invention is to: the respective roadability of the Direct Air-cooled Unit coexisted for above-mentioned power station and wet type cooling unit, a kind of method that effectively can improve steam turbine set UTILIZATION OF VESIDUAL HEAT IN is provided, the method utilizes the feedwater of the high-temperature steam heating wet type cooling unit in Direct Air-cooled Unit steam exhaust device, the waste heat of the pure electric turbine group without heat demand is made to obtain rationally, effectively, reliably utilizing, reduce energy consumption, increase is exerted oneself, and significantly reduces cost of electricity-generating.
The technical solution used in the present invention is: a kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN, described method is based on the Direct Air-cooled Unit coexisted in power station and wet type cooling unit, heat exchanger is had additional in the steam exhaust device of Direct Air-cooled Unit, the feedwater of wet type cooling unit is caused on the heat exchanger arranged in Direct Air-cooled Unit steam exhaust device and circulate, utilize the feedwater of the high-temperature steam heating wet type cooling unit in Direct Air-cooled Unit steam exhaust device.
Further, described heat exchanger is the surface-type heat exchanger that heat exchanging tube is made.
Further, described feedwater is drawn from the supply pipe after wet type cooling unit gland heater, this supply pipe draws and has feedwater heat exchange intake pipe and feedwater heat exchange return pipe, the heat exchanger that feedwater heat exchange intake pipe and feedwater heat exchange return pipe are arranged in Direct Air-cooled Unit steam exhaust device forms feed water circuit on supply pipe.
Further, the supply pipe between described feedwater heat exchange intake pipe and feedwater heat exchange return pipe is provided with valve.
Further, described feedwater heat exchange intake pipe and feedwater heat exchange return pipe are respectively equipped with valve.
The invention has the beneficial effects as follows, in the power station that Direct Air-cooled Unit and wet type cooling unit coexist, this characteristic (saturation temperature is poor is about 15 ~ 25 DEG C) utilizing Direct Air-cooled Unit higher than wet type cooling unit exhaust pressure, heat exchanger is set up in the steam exhaust device of Direct Air-cooled Unit, the feedwater of wet type cooling unit is caused on aforesaid heat exchangers and circulates, utilize the feedwater of the high-temperature steam heating wet type cooling unit in Direct Air-cooled Unit steam exhaust device, the advantage of this measure is:
For Direct Air-cooled Unit, the wet type cooling unit of the high-temperature steam in steam exhaust device and heater internal circulation flow feeds water and carries out heat exchange, in steam exhaust device, the weary heat of steam turbine set cold junction steam discharge rationally, effectively, is reliably utilized, avoid thermal waste, the vapor (steam) temperature entering air cooling condenser is relatively very low, the heat load of air cooling condenser decreases, the condensation efficiency of steam significantly improves, also corresponding reduction is thereupon required to the mechanical efficiency of axial flow cooling blower, significantly reduce the power consumption of power plant, effectively reduce the cost of electricity-generating of power station; Further, after the steam that temperature is relatively very low and air heat-exchange condense, the heat entered in air is very little, alleviates thermo-pollution, energy-conserving and environment-protective;
For wet type cooling unit, high-temperature steam in Direct Air-cooled Unit steam exhaust device has carried out heating (feedwater heat absorption heats up about 10 ~ 15 DEG C) to the low temperature feedwater of wet type cooling unit, thus reduce drawing gas at final stage low-pressure heater place to feedwater heating, effectively reduce the high-quality steam waste of wet type cooling unit, add exerting oneself of wet type cooling unit, improve generated energy, significantly reduce the energy consumption of wet type cooling unit, the operating cost of wet type cooling unit is greatly reduced;
Described in before combining, the present invention rationally, effectively, reliably make use of the waste heat of Direct Air-cooled Unit, reduces the energy consumption of Direct Air-cooled Unit and wet type cooling unit, add exerting oneself of wet type cooling unit, significantly reduce the cost of electricity-generating of power station, energy-conserving and environment-protective, income significantly and improve reliably.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is a kind of theory diagram of the present invention.
Code name implication in figure: 1-Direct Air-cooled Unit; 2-wet type cooling unit; 3-high back pressure steam exhaust device; 4-low back pressure vapour condenser; 5-air cooling condenser; 6-heat exchanger; 7-supply pipe; 8-feedwater heat exchange intake pipe; 9-feedwater heat exchange return pipe; V1, v2, v3-valve.
Embodiment
See Fig. 1: the present invention realizes based on the Direct Air-cooled Unit 1 coexisted in power station and wet type cooling unit 2.Large Diameter Pipeline blow-off line is generally at the high back pressure steam exhaust device 3(not affecting Direct Air-cooled Unit 1) under the prerequisite of sealability, heat exchanger 6 is had additional in the high back pressure steam exhaust device 3 of Direct Air-cooled Unit 1, the feedwater of wet type cooling unit 2 is caused on the heat exchanger 6 that arranges in the high back pressure steam exhaust device 3 of Direct Air-cooled Unit 1 and circulate, utilize the feedwater of the high-temperature steam heating wet type cooling unit 2 in the high back pressure steam exhaust device 3 of Direct Air-cooled Unit 1, concrete measure is as follows.
Steam turbine set cold junction steam discharge drains in air cooling condenser 5 and condenses by the high back pressure steam exhaust device 3 of Direct Air-cooled Unit 1, and the steam turbine set cold junction steam discharge so in high back pressure steam exhaust device 3 is high-temperature steam comparatively speaking, has very high value.In order to utilize it, under the prerequisite not affecting high back pressure steam exhaust device 3 sealability, set up the surface-type heat exchanger that a heat exchanging tube is made in high back pressure steam exhaust device 3, its shape there is no particular requirement, as long as it can meet wall shunting, heat exchange.
The feedwater of wet type cooling unit 2 is mainly by low back pressure vapour condenser 4(and clammy tower) condensation and the water of condensation (being mixed with cooling water) that obtains.The feedwater that wet type cooling unit 2 enters the heat exchanger 9 arranged in Direct Air-cooled Unit 1 high back pressure steam exhaust device 3 is that supply pipe 7 is drawn after the gland heater of wet type cooling unit 2, this supply pipe 7 draws successively and has feedwater heat exchange intake pipe 8 and feedwater heat exchange return pipe 9, feedwater heat exchange intake pipe 8 and feedwater heat exchange return pipe 9 are connected on the heat exchanger 6 of setting in high back pressure steam exhaust device 3, the heat exchanger 6 arranged in high back pressure steam exhaust device 3 forms feed water circuit on supply pipe 7, namely the low temperature feedwater in wet type cooling unit 2 supply pipe 7 enters in the heat exchanger 6 of setting in high back pressure steam exhaust device 3 through feedwater heat exchange intake pipe 8, heat exchange is carried out with Direct Air-cooled Unit 1 cold junction steam discharge, supply pipe 7 is entered by feedwater heat exchange return pipe 9 after being heated, and flow through final stage low-pressure heater by supply pipe 7 and heat.In order to ensure can all enter in the heat exchanger 6 that arranges in high back pressure steam exhaust device 3 from supply pipe 7 upstream low temperature feedwater out, supply pipe 7 between feedwater heat exchange intake pipe 8 and feedwater heat exchange return pipe 9 is provided with valve v1, also in order to control to enter flow in high back pressure steam exhaust device 3 and get back to the flow of supply pipe 7 in high back pressure steam exhaust device 3, feedwater heat exchange intake pipe 8 and feedwater heat exchange return pipe 9 are respectively equipped with valve, i.e. valve v2, v3.
Running of the present invention is: the runnability of collecting Direct Air-cooled Unit 1 and wet type cooling unit 2, analyze the data (realizing based on existing routine techniques) such as back pressure, load, exhaust steam flow, determine that the heat exchange between Direct Air-cooled Unit 1 and wet type cooling unit 2 regulates operating mode according to these runnabilitys.
The feedwater heat exchange intake pipe 8 opening wet type cooling unit 2 and the valve fed water on heat exchange return pipe 9, i.e. valve v2 and valve v3, and the valve of closing between feedwater heat exchange intake pipe 8 and feedwater heat exchange return pipe 9 on supply pipe 7, i.e. valve v1, unit commitment is run, the feedwater of wet type cooling unit 2 is heated by the high-temperature steam in Direct Air-cooled Unit 1 high back pressure steam exhaust device 3 by feed water circuit, after the feedwater heat temperature raising of wet type cooling unit 2, the final stage low-pressure heater flowing back to wet type cooling unit 2 heats, the vapor (steam) temperature that high back pressure steam exhaust device 3 drains into air cooling condenser 5 is simultaneously reduced by heat exchange.
After Direct Air-cooled Unit 1 is shut down, the valve v1 on standard-sized sheet wet type cooling unit 2 supply pipe 7, close the valve v2 on feedwater heat exchange the intake pipe 8 and valve v3 on feedwater heat exchange return pipe 9, wet type cooling unit 2 runs and restores.
After wet type cooling unit 2 is shut down, without the need to any operation, Direct Air-cooled Unit 1 is run and is restored.
Claims (4)
1. one kind is improved the method for steam turbine set UTILIZATION OF VESIDUAL HEAT IN, it is characterized in that: described method is based on the Direct Air-cooled Unit coexisted in power station and wet type cooling unit, heat exchanger is had additional in the steam exhaust device of Direct Air-cooled Unit, the feedwater of wet type cooling unit is caused on the heat exchanger arranged in Direct Air-cooled Unit steam exhaust device and circulate, utilize the feedwater of the high-temperature steam heating wet type cooling unit in Direct Air-cooled Unit steam exhaust device; Described feedwater is drawn from the supply pipe after wet type cooling unit gland heater, this supply pipe draws and has feedwater heat exchange intake pipe and feedwater heat exchange return pipe, the heat exchanger that feedwater heat exchange intake pipe and feedwater heat exchange return pipe are arranged in Direct Air-cooled Unit steam exhaust device forms feed water circuit on supply pipe.
2. improve the method for steam turbine set UTILIZATION OF VESIDUAL HEAT IN according to claim 1, it is characterized in that: described heat exchanger is the surface-type heat exchanger that heat exchanging tube is made.
3. improve the method for steam turbine set UTILIZATION OF VESIDUAL HEAT IN according to claim 1, it is characterized in that: the supply pipe between described feedwater heat exchange intake pipe and feedwater heat exchange return pipe is provided with valve.
4. according to claim 1 or 3, improve the method for steam turbine set UTILIZATION OF VESIDUAL HEAT IN, it is characterized in that: described feedwater heat exchange intake pipe and feedwater heat exchange return pipe are respectively equipped with valve.
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| CN201310621111.XA CN103628939B (en) | 2013-11-29 | 2013-11-29 | A kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN |
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| CN201310621111.XA CN103628939B (en) | 2013-11-29 | 2013-11-29 | A kind of method improving steam turbine set UTILIZATION OF VESIDUAL HEAT IN |
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| CN103628939B true CN103628939B (en) | 2016-01-13 |
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| CN106500518B (en) * | 2016-10-26 | 2019-05-17 | 东方电气集团东方汽轮机有限公司 | A kind of Direct Air-cooled Unit steam exhaust device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963160A (en) * | 2006-12-11 | 2007-05-16 | 哈尔滨汽轮机厂辅机工程有限公司 | Energy-saving vapour-exhausting device with built-in heat exchanger |
| CN101696643A (en) * | 2009-10-30 | 2010-04-21 | 北京联合优发能源技术有限公司 | Low-temperature heat energy recovering apparatus of heat and electricity co-generation and recovering method thereof |
| CN102392702A (en) * | 2011-07-20 | 2012-03-28 | 李德军 | Fully-closed circulating water system for recovering latent heat of condensing generation units by utilizing air cooler |
| CN202348352U (en) * | 2011-08-17 | 2012-07-25 | 王玉山 | Cooling system in thermal power plant |
| CN203146044U (en) * | 2013-03-12 | 2013-08-21 | 太原市宇腾达科技有限公司 | Dead steam heat recycle equipment of air cooling turbine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5246340Y2 (en) * | 1973-07-03 | 1977-10-21 | ||
| DE19535228C2 (en) * | 1995-09-22 | 2003-05-08 | Alstom | Process for operating a power plant |
-
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- 2013-11-29 CN CN201310621111.XA patent/CN103628939B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963160A (en) * | 2006-12-11 | 2007-05-16 | 哈尔滨汽轮机厂辅机工程有限公司 | Energy-saving vapour-exhausting device with built-in heat exchanger |
| CN101696643A (en) * | 2009-10-30 | 2010-04-21 | 北京联合优发能源技术有限公司 | Low-temperature heat energy recovering apparatus of heat and electricity co-generation and recovering method thereof |
| CN102392702A (en) * | 2011-07-20 | 2012-03-28 | 李德军 | Fully-closed circulating water system for recovering latent heat of condensing generation units by utilizing air cooler |
| CN202348352U (en) * | 2011-08-17 | 2012-07-25 | 王玉山 | Cooling system in thermal power plant |
| CN203146044U (en) * | 2013-03-12 | 2013-08-21 | 太原市宇腾达科技有限公司 | Dead steam heat recycle equipment of air cooling turbine |
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