CN105298565A - Variable working condition active-control light-coal complementation indirect air-cooling generation system and method - Google Patents
Variable working condition active-control light-coal complementation indirect air-cooling generation system and method Download PDFInfo
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Abstract
The invention discloses a variable working condition active-control light-coal complementation indirect air-cooling generation system and method. The system comprises a boiler, a turbine, a generator, a high-pressure fed water heater, a low-pressure fed water heater, a deaerator, a steam extraction branch control valve, an absorption type refrigerator, an air-cooling condenser, a fed water branch control valve, a mirror field heat exchanger and a composite paraboloid light condenser. In the daytime in summer, the environmental temperature rises, the back pressure of the turbine rises, the turbine carries out low-pressure steam extraction to drive the absorption type refrigerator to cool air at the inlet of the air-cooling condenser, the back pressure of the turbine is made to reach the design valve, and the light condenser is used for replacing original low-pressure steam extraction to heat fed water. In the daytime in winter, the environmental temperature decreases, the back pressure of the turbine can keep the design value, the turbine carries out low-pressure steam extraction to continue expansion working, and the light condenser is used for replacing original low-pressure steam extraction to heat fed water. By means of the variable working condition active-control light-coal complementation indirect air-cooling generation system and method, the problem of the variable working condition operation efficiency of a traditional air-cooling unit is reduced in summer is solved, the annual average generation efficiency of the unit is improved, and efficient utilization of low-temperature solar energy is achieved.
Description
Technical field
The present invention relates to solar energy and fossil energy complemental power-generation and indirect air cooling technical field, particularly relate to a kind of complementary indirect air cooling power generation system of light coal and method of variable working condition active control.
Background technique
Ended for the end of the year 2009, China adds up to the operation of 35.4GW direct air cooling fired power generating unit and runs, and electric motor power reaches 5.4% of thermoelectricity total installation of generating capacity, and Direct Air-cooled Unit has the advantages such as water saving, resistance to frost is good, floor space is little, investment cost is low.But simultaneously, Direct Air-cooled Unit is significantly affected by environment, ambient temperature can have a negative impact to its economical operation, during summer high temperature sweltering heat, unit operation back pressure is higher, 30 ~ 40kPa is risen to from design back-pressure 10 ~ 19kPa, unit is forced to load down and runs, and had a strong impact on the economical operation of unit, the average annual generating efficiency of unit will decline to a great extent.For this reason, some power station carries out frequent high standard cleaning in summer to air cooling unit, or installs water spray additional and realize cooling, but the water saving target of this and direct air cooling runs in the opposite direction, and produces little effect.
It should be noted that summer hot weather usually and solar irradiance intensity is high is accompanied, this is just for the variable parameter operation performance in summer improving Direct Air-cooled Unit provides a new thinking.Application number be 201420508838.7 utility model patent propose a kind of Air-cooled Unit of solar energy absorption type refrigeration, absorption refrigeration is driven by solar thermal collector, in air cooling unit, heat exchange reduces air cooling device inlet air temperature to reach, the object of strengthening air cooling device cooling effect.But above scheme is mainly for the summer of sweltering heat, when winter environment temperature declines, when Air-cooled Unit can realize declared working condition operation, solar energy mirror field will be in idle state for a long time, causes fixed investment to waste, and whole system Economy is difficult to improve.
Therefore, how to carry out all system active control, under guarantee variable working condition, the generated output of fired power generating unit is stablized, realize the annual generating efficiency of unit close to declared working condition, fully effectively utilize solar energy resources simultaneously, become the key technical problem utilizing solar energy to solve a direct air cooling variable parameter operation difficult problem.
Summary of the invention
(1) technical problem that will solve
In view of this, main purpose of the present invention is to provide the complementary indirect air cooling power generation system of a kind of light coal of variable working condition active control and method, by the Power island of system, backheat subtense angle, the critical process such as absorption refrigeration unit intercouple, according to varying environment condition, draw gas at heated feed water by steam turbine low-pressure, drive absorption refrigeration, active between the functions such as expansion working switches, realize the active control of light coal complementary system indirect refrigeration, make thermal power station summer generating efficiency still close to design conditions, and winter also effectively can utilize solar energy resources, improve the Technical Economy of whole system.
(2) technological scheme
For achieving the above object, the invention provides a kind of complementary indirect air cooling power generation system of light coal of variable working condition active control, this system comprises boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, high-pressure feed-water heater 6, high pressure water pump 7, oxygen-eliminating device 8, low-pressure feed heater 9, low pressure feed water pump 10, the flow circuit control valve 11 that draws gas, Absorption Refrigerator 12, air-cooled condenser 13, feedwater flow circuit control valve 14, mirror field heat exchanger 15 and compound parabolic concentrator 16, wherein:
Boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, high-pressure feed-water heater 6, high pressure water pump 7, oxygen-eliminating device 8, low-pressure feed heater 9, low pressure feed water pump 10 and air-cooled condenser 13 form thermodynamic cycle loop; Absorption Refrigerator 12 and air-cooled condenser 13 form Absorption Refrigerator branch road, and mirror field heat exchanger 15 and compound parabolic concentrator 16 form mirror field heat exchanger branch road, and turbine low pressure cylinder 4 and low-pressure feed heater 9 form the heated feed water branch road that draws gas;
Boiler 1 produces main steam, and successively by steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 expansion working, drive electrical generators 5 is electromotive power output externally; Exhaust steam enters air-cooled condenser 13 and is cooled to condensed water, pressurizeed by low pressure feed water pump 10, enter low-pressure feed heater 9 to heat, then enter oxygen-eliminating device 8, pressurizeed further by high pressure water pump 7 again, enter high-pressure feed-water heater 6, after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle;
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve 11 that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, cools, make turbine back pressure close to design load to air-cooled condenser 13 intake air; Meanwhile, feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road, enables compound parabolic concentrator 16, substitutes former low-pressure pumping steam heating low pressure feed water;
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder 4; Meanwhile, feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road, enables compound parabolic concentrator 16, substitutes former low-pressure pumping steam heating low pressure feed water;
At summer and night in winter, ambient temperature declines, and steam turbine can maintain back pressure when being design load, the flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, and steam turbine low-pressure draws gas and enters the low-pressure feed heater 9 of minimal pressure, recovery heating feeding water function; Meanwhile, feedwater flow circuit control valve 14 closes a heat exchanger branch road of covering the lens, and compound parabolic concentrator 16 is closed.
In such scheme, driving heat source temperature needed for described Absorption Refrigerator 12 and steam turbine low-pressure extraction temperature close, compound parabolic concentrator 16 heat-collecting temperature and low pressure feed water heating-up temperature close, system ensure that in newly-increased flow process, irreversible loss is minimum while realizing indirect air cooling, raising steam turbine cycle efficiency; And there is positive association relation due to solar irradiance intensity and ambient temperature, under varying environment condition by low-pressure pumping steam at heating low pressure feed water, drive absorption refrigeration, active between turbine low pressure cylinder expansion working three functions switches, and realizes the active control of light coal complementary system indirect refrigeration.
In such scheme, the described flow circuit control valve 11 that draws gas opens Absorption Refrigerator branch road at summer day, its flow control depends on that ambient temperature raises, and causes condenser inlet air temperature elevated-levels, and meeting refrigerating capacity of drawing gas can be cooled to design load by air temperature as far as possible.
In such scheme, described in the flow circuit control valve 11 that draws gas close Absorption Refrigerator branch road daytime in the winter time, draw gas at turbine low pressure cylinder expansion working; When compound parabolic concentrator 16 heat-collecting capacity can not meet low pressure feed water demand for heat completely, part is drawn gas and is still entered low-pressure feed heater, and solar irradiance situation is depended in its flow control, meets its thermal discharge and enough residue feedwater is heated to design temperature.
In such scheme, described feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road in summer and daytime in winter, solar irradiance situation is depended in its flow control, meets compound parabolic concentrator 16 heat-collecting capacity and the feedwater entering mirror field heat exchanger branch road is heated to design temperature.
In such scheme, described mirror field heat exchanger 15 is in parallel with low-pressure feed heater 9, with all the other the feed water preheater series operations in the heat regenerative system of power station.
In such scheme, the low-pressure pumping steam of described driving Absorption Refrigerator 12, in refrigerator after exothermic condensation, exports at air-cooled condenser 13 and collects with other condensed waters, again participate in the thermodynamic cycle of unit.
For achieving the above object, present invention also offers a kind of complementary indirect air cooling electricity-generating method of light coal of variable working condition active control, the method comprises:
Boiler 1 produces main steam, and successively by steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 expansion working, drive electrical generators 5 is electromotive power output externally; Exhaust steam enters air-cooled condenser 13 and is cooled to condensed water, pressurizeed by low pressure feed water pump 10, enter low-pressure feed heater 9 to heat, then enter oxygen-eliminating device 8, pressurizeed further by high pressure water pump 7 again, enter high-pressure feed-water heater 6, after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle;
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, cools air-cooled condenser intake air, makes turbine back pressure close to design load; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
At summer and night in winter, ambient temperature declines, and steam turbine can maintain back pressure when being design load, the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, and steam turbine low-pressure draws gas and enters the low-pressure feed heater of minimal pressure, recovery heating feeding water function; Meanwhile, feedwater flow circuit control valve closes a heat exchanger branch road of covering the lens, and compound parabolic concentrator Jing Chang closes.
In such scheme, the described flow circuit control valve 11 that draws gas opens Absorption Refrigerator branch road at summer day, its flow control depends on that ambient temperature raises, and causes condenser inlet air temperature elevated-levels, and namely meeting refrigerating capacity of drawing gas can be cooled to design load by air temperature as far as possible.
In such scheme, the flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road daytime in the winter time, and drawing gas can at turbine low pressure cylinder expansion working; When compound parabolic concentrator 16 heat-collecting capacity can not meet low pressure feed water demand for heat completely, part is drawn gas and is still entered low-pressure feed heater, and solar irradiance situation is depended in its flow control, meets its thermal discharge and enough residue feedwater is heated to design temperature.
In such scheme, described feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road in summer and daytime in winter, solar irradiance situation is depended in its flow control, meets compound parabolic concentrator 16 heat-collecting capacity and the feedwater entering mirror field heat exchanger branch road is heated to design temperature.
In such scheme, the complementary indirect air cooling power generation system of light coal of described variable working condition active control according to claim 1, it is characterized in that, described mirror field heat exchanger 15 is in parallel with low-pressure feed heater 9, with all the other the feed water preheater series operations in the heat regenerative system of power station.
In such scheme, the low-pressure pumping steam of described driving Absorption Refrigerator 12, in refrigerator after exothermic condensation, exports at air-cooled condenser 13 and collects with other condensed waters, again participate in the thermodynamic cycle of unit.
(3) beneficial effect
As can be seen from technique scheme, the present invention has following beneficial effect:
1, utilize the present invention, summer day, drive Absorption Refrigerator by low-pressure pumping steam, lower the temperature to air cooling unit, can realize the stable and high effective operation of Direct Air-cooled Unit in summer, generating efficiency is close to design level;
2, utilize the present invention, daytime in winter, solar energy heating Jing Chang substitutes low-pressure pumping steam, heating low pressure feed water, low-pressure pumping steam can continue at turbine low pressure cylinder expansion working, thus increase system goes out merit, improve system effectiveness, realize the efficiency utilization of low-temperature solar energy simultaneously;
3, utilize the present invention, when daytime in winter, solar irradiance was not enough, part low-pressure pumping steam still can be used for heating low pressure feed water, makes low-pressure feed heater export water temperature and reaches design load, ensure the stable operation of steam turbine;
4, utilize the present invention, the Jing Chang avoiding very long winter leaves unused, and is conducive to the making full use of of solar energy resources, the investment of compound parabolic concentrator reclaims.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the complementary indirect air cooling power generation system of light coal according to a kind of variable working condition active control of the embodiment of the present invention;
Wherein reference character is: 1-boiler; 2-steam turbine high-pressure cylinder; 3-Steam Turbine Through IP Admission; 4-turbine low pressure cylinder; 5-generator; 6-high-pressure feed-water heater; 7-high pressure water pump; 8-oxygen-eliminating device; 9-low-pressure feed heater; 10-low-pressure feed heater; 11-draws gas branch road control valve; 12-Absorption Refrigerator; 13-air-cooled condenser; 14-feedwater branch road control valve; 15-mirror field heat exchanger; 16-compound parabolic concentrator (CPC) Jing Chang.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, Fig. 1 is the schematic diagram of the complementary indirect air cooling power generation system of light coal according to the variable working condition active control of the embodiment of the present invention, this system comprises boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, high-pressure feed-water heater 6, high pressure water pump 7, oxygen-eliminating device 8, low-pressure feed heater 9, low pressure feed water pump 10, draw gas flow circuit control valve 11, Absorption Refrigerator 12, air-cooled condenser 13, feedwater flow circuit control valve 14, mirror field heat exchanger 15 and compound parabolic concentrator 16, wherein, boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, high-pressure feed-water heater 6, high pressure water pump 7, oxygen-eliminating device 8, low-pressure feed heater 9, low pressure feed water pump 10 and air-cooled condenser 13 form thermodynamic cycle loop, Absorption Refrigerator 12 and air-cooled condenser 13 form Absorption Refrigerator branch road, and mirror field heat exchanger 15 and compound parabolic concentrator 16 form mirror field heat exchanger branch road, and turbine low pressure cylinder 4 and low-pressure feed heater 9 form the heated feed water branch road that draws gas.
Boiler 1 produces main steam, and successively by steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 expansion working, drive electrical generators 5 is electromotive power output externally; Exhaust steam enters air-cooled condenser 13 and is cooled to condensed water, pressurizeed by low pressure feed water pump 10, enter low-pressure feed heater 9 to heat, then enter oxygen-eliminating device 8, pressurizeed further by high pressure water pump 7 again, enter high-pressure feed-water heater 6, after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle.
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve 11 that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, cools, make turbine back pressure close to design load to air-cooled condenser 13 intake air; Meanwhile, feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road, enables compound parabolic concentrator 16, substitutes former low-pressure pumping steam heating low pressure feed water.
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder 4; Meanwhile, feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road, enables compound parabolic concentrator 16, substitutes former low-pressure pumping steam heating low pressure feed water.
At summer and night in winter, ambient temperature declines, and steam turbine can maintain back pressure when being design load, the flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, and steam turbine low-pressure draws gas and enters the low-pressure feed heater 9 of minimal pressure, recovery heating feeding water function; Meanwhile, feedwater flow circuit control valve 14 closes a heat exchanger branch road of covering the lens, and compound parabolic concentrator 16 is closed.
Driving heat source temperature needed for Absorption Refrigerator 12 and steam turbine low-pressure extraction temperature close, compound parabolic concentrator 16 heat-collecting temperature and low pressure feed water heating-up temperature close, system ensure that in newly-increased flow process, irreversible loss is minimum while realizing indirect air cooling, raising steam turbine cycle efficiency; And there is positive association relation due to solar irradiance intensity and ambient temperature, under varying environment condition by low-pressure pumping steam at heating low pressure feed water, drive absorption refrigeration, active between turbine low pressure cylinder expansion working three functions switches, and realizes the active control of light coal complementary system indirect refrigeration.
In Fig. 1, the flow circuit control valve 11 that draws gas opens Absorption Refrigerator branch road at summer day, and its flow control depends on that ambient temperature raises, and causes condenser inlet air temperature elevated-levels, and meeting refrigerating capacity of drawing gas can be cooled to design load by air temperature as far as possible.The flow circuit control valve 11 that draws gas closes Absorption Refrigerator branch road daytime in the winter time, draws gas at turbine low pressure cylinder expansion working; When compound parabolic concentrator 16 heat-collecting capacity can not meet low pressure feed water demand for heat completely, part is drawn gas and is still entered low-pressure feed heater, and solar irradiance situation is depended in its flow control, meets its thermal discharge and enough residue feedwater is heated to design temperature.Feedwater flow circuit control valve 14 opens mirror field heat exchanger branch road in summer and daytime in winter, and solar irradiance situation is depended in its flow control, meets compound parabolic concentrator 16 heat-collecting capacity and the feedwater entering mirror field heat exchanger branch road is heated to design temperature.Mirror field heat exchanger 15 is in parallel with low-pressure feed heater 9, with all the other the feed water preheater series operations in the heat regenerative system of power station.Drive the low-pressure pumping steam of Absorption Refrigerator 12, in refrigerator after exothermic condensation, export at air-cooled condenser 13 and collect with other condensed waters, again participate in the thermodynamic cycle of unit.
The complementary indirect air cooling power generation system of light coal based on the variable working condition active control shown in Fig. 1, present invention also offers a kind of complementary indirect air cooling electricity-generating method of light coal of variable working condition active control, the method comprises:
Boiler 1 produces main steam, and successively by steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 expansion working, drive electrical generators 5 is electromotive power output externally; Exhaust steam enters air-cooled condenser 13 and is cooled to condensed water, pressurizeed by low pressure feed water pump 10, enter low-pressure feed heater 9 to heat, then enter oxygen-eliminating device 8, pressurizeed further by high pressure water pump 7 again, enter high-pressure feed-water heater 6, after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle;
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, cools air-cooled condenser intake air, makes turbine back pressure close to design load; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
At summer and night in winter, ambient temperature declines, and steam turbine can maintain back pressure when being design load, the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, and steam turbine low-pressure draws gas and enters the low-pressure feed heater of minimal pressure, recovery heating feeding water function; Meanwhile, feedwater flow circuit control valve closes a heat exchanger branch road of covering the lens, and compound parabolic concentrator Jing Chang closes.
In a specific embodiment provided by the invention, China's vast southern area (Zhejiang Province, Jiangsu Province etc.) daily mean temperature in summer is higher, solar irradiance aboundresources simultaneously, local 330MW direct air cooling formula Coal-fired Thermal Power station is selected to carry out solar energy complementation transformation, unit design back pressure is 15kPa, design air temperature is 17 DEG C, under declared working condition, unit low-pressure feed heater import/export water temperature design load is 55.4/93.1 DEG C, and former three grades of low-pressure pumping steam thermal parameters are respectively 290.8 DEG C/0.5969MPa; 208.5 DEG C/0.2692MPa; 106.4 DEG C/0.0918MPa.Unit year, hours of operation was about 5000, and wherein the summer operation time is 3000 hours, and working time in winter is 2000 hours.
Summer day, nearly 27 DEG C of daily mean temperature, do not take the unit of complementary transformation, back pressure rises to 30kPa, and power drop is 310MW, and generating efficiency is down to 38.3% from 40.8%, decrease in efficiency 2.5 percentage points.Former low-pressure pumping steam is driven single-effect lithium bromide absorption refrigerating machine group, for reducing air cooling unit entering air temperature by the present invention.Former wind cooling unit design wind speed is 2.15m/s, and design wind-exposuring area is 5368m
2the occurrence temperature of cooling machine set is selected to be more than 85 DEG C, COP is 0.7, then for realizing the cooling of air cooling unit, drive absorption refrigeration unit institute calorific requirement to be 212.7MW, and the total thermal discharge of low-pressure pumping steam is 96MW, air temperature can be reduced by 4.5 degree, back pressure reduces to 25kPa, and power increases to 317MW, whole summer will be expected to increment life insurance 21GWh, and now unit generation efficiency is 39.2%; Meanwhile, adopt CPC compound parabolic concentrator to obtain the hot water that import/export temperature is 75/174 DEG C, substitute former unit low-pressure pumping steam and feedwater is heated to design temperature.
Daytime in winter, daily mean temperature under design temperature, air cooling unit normal operation, former low-pressure pumping steam can continue at turbine low pressure cylinder expansion working, and being expected to whole winter increases generated energy 20GWh, and generating efficiency increases to 42.0%; Meanwhile, adopt CPC compound parabolic concentrator to obtain the hot water that import/export temperature is 75/174 DEG C, substitute former unit low-pressure pumping steam heated feed water to design temperature, can realize low-temperature solar energy efficiency utilization, the clean generating efficiency of solar energy reaches 12%.Summer and night in winter, fired power generating unit reverts to former operating mode, and low-pressure pumping steam still lowly adds feedwater for heating, and compound parabolic concentrator is closed, and ensures the safe and stable operation of unit.
To sum up, solar energy is adopted to carry out complementation transformation to fired power generating unit, realize indirect air cooling, be expected to realize annual generated energy significantly increase, estimate that increasing electricity can meet 10,000 people's Urban Annual Electrical Power Consumption amounts (per capita household electricity consumption 3936kWh in 2013), make the annual generating efficiency of fired power generating unit reach 40.3%, even exceed unit design level, and make full use of solar energy heating Jing Chang in the winter time, realize the efficiency power generation of low-temperature solar energy.
Above-described specific embodiment; object of the present invention, technological scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the complementary indirect air cooling power generation system of the light coal of a variable working condition active control, it is characterized in that, this system comprises boiler (1), steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4), generator (5), high-pressure feed-water heater (6), high pressure water pump (7), oxygen-eliminating device (8), low-pressure feed heater (9), low pressure feed water pump (10), draw gas flow circuit control valve (11), Absorption Refrigerator (12), air-cooled condenser (13), feedwater flow circuit control valve (14), mirror field heat exchanger (15) and compound parabolic concentrator (16), wherein:
Boiler (1), steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4), generator (5), high-pressure feed-water heater (6), high pressure water pump (7), oxygen-eliminating device (8), low-pressure feed heater (9), low pressure feed water pump (10) and air-cooled condenser (13) form thermodynamic cycle loop; Absorption Refrigerator (12) and air-cooled condenser (13) form Absorption Refrigerator branch road, mirror field heat exchanger (15) and compound parabolic concentrator (16) form mirror field heat exchanger branch road, and turbine low pressure cylinder (4) and low-pressure feed heater (9) form the heated feed water branch road that draws gas;
Boiler (1) produces main steam, and successively by steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4) expansion working, drive electrical generators (5) is electromotive power output externally; Exhaust steam enters air-cooled condenser (13) and is cooled to condensed water, pressurizeed by low pressure feed water pump (10), enter low-pressure feed heater (9) heating, then enter oxygen-eliminating device (8), pressurizeed further by high pressure water pump (7) again, enter high-pressure feed-water heater (6), after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle;
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve (11) that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, air-cooled condenser (13) intake air is cooled, makes turbine back pressure close to design load; Meanwhile, mirror field heat exchanger branch road is opened in feedwater flow circuit control valve (14), enables compound parabolic concentrator (16), substitutes former low-pressure pumping steam heating low pressure feed water;
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve that draws gas (11) closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder (4); Meanwhile, mirror field heat exchanger branch road is opened in feedwater flow circuit control valve (14), enables compound parabolic concentrator (16), substitutes former low-pressure pumping steam heating low pressure feed water;
At summer and night in winter, ambient temperature declines, steam turbine can maintain back pressure when being design load, the flow circuit control valve (11) that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, steam turbine low-pressure draws gas the low-pressure feed heater (9) entering minimal pressure, recovery heating feeding water function; Meanwhile, a heat exchanger branch road of covering the lens is closed in feedwater flow circuit control valve (14), and compound parabolic concentrator (16) is closed.
2. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, the required driving heat source temperature of described Absorption Refrigerator (12) and steam turbine low-pressure extraction temperature close, compound parabolic concentrator (16) heat-collecting temperature and low pressure feed water heating-up temperature close, system ensure that in newly-increased flow process, irreversible loss is minimum while realizing indirect air cooling, raising steam turbine cycle efficiency; And there is positive association relation due to solar irradiance intensity and ambient temperature, under varying environment condition by low-pressure pumping steam at heating low pressure feed water, drive absorption refrigeration, active between turbine low pressure cylinder expansion working three functions switches, and realizes the active control of light coal complementary system indirect refrigeration.
3. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, the described flow circuit control valve that draws gas (11) opens Absorption Refrigerator branch road at summer day, its flow control depends on that ambient temperature raises, cause condenser inlet air temperature elevated-levels, meeting refrigerating capacity of drawing gas can be cooled to design load by air temperature as far as possible.
4. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, the described flow circuit control valve that draws gas (11) closes Absorption Refrigerator branch road daytime in the winter time, draws gas at turbine low pressure cylinder expansion working; When compound parabolic concentrator (16) heat-collecting capacity can not meet low pressure feed water demand for heat completely, part is drawn gas and is still entered low-pressure feed heater, solar irradiance situation is depended in its flow control, meets its thermal discharge and enough residue feedwater is heated to design temperature.
5. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, described feedwater flow circuit control valve (14) opens mirror field heat exchanger branch road in summer and daytime in winter, solar irradiance situation is depended in its flow control, meets compound parabolic concentrator (16) heat-collecting capacity and the feedwater entering mirror field heat exchanger branch road is heated to design temperature.
6. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, described mirror field heat exchanger (15) is in parallel with low-pressure feed heater (9), with all the other the feed water preheater series operations in the heat regenerative system of power station.
7. the complementary indirect air cooling power generation system of the light coal of variable working condition active control according to claim 1, it is characterized in that, the low-pressure pumping steam of described driving Absorption Refrigerator (12), in refrigerator after exothermic condensation, collect with other condensed waters in air-cooled condenser (13) outlet, again participate in the thermodynamic cycle of unit.
8. the complementary indirect air cooling electricity-generating method of the light coal of variable working condition active control, be applied to the system according to any one of claim 1 to 7, the method comprises:
Boiler (1) produces main steam, and successively by steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4) expansion working, drive electrical generators (5) is electromotive power output externally; Exhaust steam enters air-cooled condenser (13) and is cooled to condensed water, pressurizeed by low pressure feed water pump (10), enter low-pressure feed heater (9) heating, then enter oxygen-eliminating device (8), pressurizeed further by high pressure water pump (7) again, enter high-pressure feed-water heater (6), after being heated to the requirement of boiler inlet water temperature, enter boiler, complete thermodynamic cycle;
At summer day, ambient temperature raises, when causing turbine back pressure to rise, the flow circuit control valve that draws gas opens Absorption Refrigerator branch road, steam turbine low-pressure draws gas for driving Absorption Refrigerator, cools air-cooled condenser intake air, makes turbine back pressure close to design load; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
On daytime in the winter time, ambient temperature declines, and steam turbine can maintain back pressure when being design load, and the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, and steam turbine low-pressure draws gas and can continue expansion working in turbine low pressure cylinder; Meanwhile, feedwater flow circuit control valve opens mirror field heat exchanger branch road, enables compound parabolic concentrator, substitutes former low-pressure pumping steam heating low pressure feed water;
At summer and night in winter, ambient temperature declines, and steam turbine can maintain back pressure when being design load, the flow circuit control valve that draws gas closes Absorption Refrigerator branch road, unlatching is drawn gas heated feed water branch road, and steam turbine low-pressure draws gas and enters the low-pressure feed heater of minimal pressure, recovery heating feeding water function; Meanwhile, feedwater flow circuit control valve closes a heat exchanger branch road of covering the lens, and compound parabolic concentrator Jing Chang closes.
9. the complementary indirect air cooling electricity-generating method of the light coal of variable working condition active control according to claim 8, it is characterized in that, the described flow circuit control valve that draws gas (11) opens Absorption Refrigerator branch road at summer day, its flow control depends on that ambient temperature raises, cause condenser inlet air temperature elevated-levels, namely meeting refrigerating capacity of drawing gas can be cooled to design load by air temperature as far as possible.
10. the complementary indirect air cooling electricity-generating method of the light coal of variable working condition active control according to claim 8, it is characterized in that, the flow circuit control valve (11) that draws gas closes Absorption Refrigerator branch road daytime in the winter time, and drawing gas can at turbine low pressure cylinder expansion working; When compound parabolic concentrator (16) heat-collecting capacity can not meet low pressure feed water demand for heat completely, part is drawn gas and is still entered low-pressure feed heater, solar irradiance situation is depended in its flow control, meets its thermal discharge and enough residue feedwater is heated to design temperature.
The complementary indirect air cooling electricity-generating method of light coal of 11. variable working condition active controls according to claim 8, it is characterized in that, described feedwater flow circuit control valve (14) opens mirror field heat exchanger branch road in summer and daytime in winter, solar irradiance situation is depended in its flow control, meets compound parabolic concentrator (16) heat-collecting capacity and the feedwater entering mirror field heat exchanger branch road is heated to design temperature.
The complementary indirect air cooling electricity-generating method of light coal of 12. variable working condition active controls according to claim 8, it is characterized in that, the complementary indirect air cooling power generation system of light coal of described variable working condition active control according to claim 1, it is characterized in that, described mirror field heat exchanger (15) is in parallel with low-pressure feed heater (9), with all the other the feed water preheater series operations in the heat regenerative system of power station.
The complementary indirect air cooling electricity-generating method of light coal of 13. variable working condition active controls according to claim 8, it is characterized in that, the low-pressure pumping steam of described driving Absorption Refrigerator (12), in refrigerator after exothermic condensation, collect with other condensed waters in air-cooled condenser (13) outlet, again participate in the thermodynamic cycle of unit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN108800651A (en) * | 2018-07-16 | 2018-11-13 | 中国科学院工程热物理研究所 | A kind of thermoelectricity air cooling tubes condenser safe production in summer device based on power peak regulation round the clock |
| CN111241711A (en) * | 2020-02-19 | 2020-06-05 | 西安交通大学 | Photoelectric conversion efficiency optimization control method for light-coal complementary system variable working condition |
| CN111306820A (en) * | 2020-02-19 | 2020-06-19 | 西安交通大学 | Variable-working-condition generated power optimization control method for light-coal complementary system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906997A (en) * | 2010-07-05 | 2010-12-08 | 双良节能系统股份有限公司 | Condensation heat recovery central heating system of power plant indirect air cooling machine set |
| CN201866832U (en) * | 2010-11-18 | 2011-06-15 | 华北电力大学 | Steam turbine bearing cooling water heat pump heating system of power plant |
| CN102454440A (en) * | 2010-10-20 | 2012-05-16 | 中国科学院工程热物理研究所 | Solar energy and thermal power station complementary power generation system with plate and groove combined |
| CN202707153U (en) * | 2012-08-08 | 2013-01-30 | 圣火科技(河南)有限责任公司 | Thermoelectricity cooling co-production system utilizing steam heat accumulator |
| CN103161531B (en) * | 2011-12-14 | 2015-07-08 | 中国科学院理化技术研究所 | Water-saving thermal power generation system and method thereof |
-
2015
- 2015-11-06 CN CN201510751539.5A patent/CN105298565B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906997A (en) * | 2010-07-05 | 2010-12-08 | 双良节能系统股份有限公司 | Condensation heat recovery central heating system of power plant indirect air cooling machine set |
| CN102454440A (en) * | 2010-10-20 | 2012-05-16 | 中国科学院工程热物理研究所 | Solar energy and thermal power station complementary power generation system with plate and groove combined |
| CN201866832U (en) * | 2010-11-18 | 2011-06-15 | 华北电力大学 | Steam turbine bearing cooling water heat pump heating system of power plant |
| CN103161531B (en) * | 2011-12-14 | 2015-07-08 | 中国科学院理化技术研究所 | Water-saving thermal power generation system and method thereof |
| CN202707153U (en) * | 2012-08-08 | 2013-01-30 | 圣火科技(河南)有限责任公司 | Thermoelectricity cooling co-production system utilizing steam heat accumulator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN108800651A (en) * | 2018-07-16 | 2018-11-13 | 中国科学院工程热物理研究所 | A kind of thermoelectricity air cooling tubes condenser safe production in summer device based on power peak regulation round the clock |
| CN108800651B (en) * | 2018-07-16 | 2024-01-23 | 中国科学院工程热物理研究所 | Thermal power air cooling condenser safety degree summer device based on day and night electric power peak regulation |
| CN111241711A (en) * | 2020-02-19 | 2020-06-05 | 西安交通大学 | Photoelectric conversion efficiency optimization control method for light-coal complementary system variable working condition |
| CN111306820A (en) * | 2020-02-19 | 2020-06-19 | 西安交通大学 | Variable-working-condition generated power optimization control method for light-coal complementary system |
| WO2021164497A1 (en) * | 2020-02-19 | 2021-08-26 | 西安交通大学 | Generated power optimization control method for solar-coal complementary system under variable working conditions |
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