CN111256192B - Comprehensive frequency modulation peak regulation system for coal-fired power plant - Google Patents
Comprehensive frequency modulation peak regulation system for coal-fired power plant Download PDFInfo
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- CN111256192B CN111256192B CN202010190255.4A CN202010190255A CN111256192B CN 111256192 B CN111256192 B CN 111256192B CN 202010190255 A CN202010190255 A CN 202010190255A CN 111256192 B CN111256192 B CN 111256192B
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 3
- 239000003245 coal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model provides a coal fired power plant's comprehensive frequency modulation peak shaving system, including the heat accumulator, the heat accumulator cold water pipeline, the heat accumulator hot water pipeline, condensate return water pipeline, the condenser, the steam turbine, the generator that is connected with the steam turbine, the electric heat conversion equipment that is connected with the generator through transmission line, one side is connected with the electric heat conversion equipment, the heat accumulation heater that the opposite side is connected with heat accumulator cold water pipeline, heat accumulator hot water pipeline through the heat accumulation pipeline, the heat supply network heater that heat accumulation pipeline is connected with heat accumulator cold water pipeline, the heat accumulator hot water pipeline, the condensate pump, the shaft seal heater that one end is connected with the condensate pump, the other end is connected with condensate water supply pipeline, low pressure heater, the deaerator, the feed pump, high pressure heater. The invention can meet the peak regulation requirement of the coal-fired power plant and the frequency modulation requirement of a large power grid, and can improve the utilization rate of the existing heat accumulator equipment and obviously improve the flexibility of the coal-fired power plant. The method can be widely applied to the flexible transformation of the coal-fired power plant.
Description
Technical Field
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, which can be widely applied to the flexible transformation of the coal-fired power plant.
Background
Energy is the basis of human survival and development, along with the development of society and economy, the demand for energy is continuously increased, and energy development and reasonable utilization are more and more concerned, so that clean green energy is needed for heating. With the adjustment of the economic policy in China, the electricity utilization structure is greatly changed, the electricity consumption of the light industry and municipal life is continuously increased, the proportion of the night electricity consumption of the heavy industry is gradually reduced relatively, the peak-valley difference of the day-night load of a large power grid is increased from 20% to 30% -50%, and the electricity consumption is also increased. The existing energy structure is also obviously changed, the proportion of renewable energy sources such as wind energy, solar energy and the like is continuously improved, and the proportion of fossil energy sources is continuously reduced. The system is subject to the nature of renewable energy sources, and the system can maintain the stability and the heavy duty of a large power grid, so that the system has higher requirements on the frequency modulation and peak regulation capability of the coal-fired power plant.
Aiming at the problems, the peak shaving technology of the electrode boiler combined heat accumulator can only be applied to heating seasons at present, and a large number of heat accumulators are idle in non-heating seasons, so that resource waste is caused. Moreover, the existing heat accumulator energy storage technology can only be used for peak shaving of a power plant, and cannot meet the frequency modulation requirement of a large power grid.
Disclosure of Invention
The invention aims to provide a comprehensive frequency modulation and peak shaving system of a coal-fired power plant, which can meet the peak shaving requirement of the coal-fired power plant and the frequency modulation requirement of a large power grid, can improve the utilization rate of the existing heat accumulator equipment and remarkably improve the flexibility of the coal-fired power plant.
In order to achieve the aim, the comprehensive frequency modulation peak shaving system of the coal-fired power plant comprises a heat accumulator, a heat accumulator cold water pipeline arranged on the lower side of the heat accumulator, a heat accumulator hot water pipeline arranged on the upper side of the heat accumulator, a condensate return pipeline connected with the heat accumulator cold water pipeline, a condenser connected with the condensate return pipeline, a steam turbine connected with the condenser through a pipeline, a generator connected with the steam turbine, an electric heat conversion device connected with the generator through a power transmission line, a heat accumulating heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline on one side through a heat accumulating pipeline, a heat net heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat releasing pipeline, a condensate pump connected with the condenser through a pipeline, a low-pressure heater connected with the condensate water pump on one end, a low-pressure heater connected with the heat accumulator hot water pipeline on the other end, a deaerator connected with the low-pressure heater through a pipeline, and a high-pressure pump connected with the deaerator through a water supply pipeline; the heat supply network heater is a partition wall type heater and can heat the heat supply network water by using hot water of the heat accumulator; the heat accumulating heater is a partition wall type heater and can heat cold water in the heat accumulator by utilizing the electric heat conversion device.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, wherein the electric heating conversion device is an electrode boiler, a heat pump, an electromagnetic boiler or a resistance boiler.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, which has the following frequency modulation working principle:
when the power grid frequency needs to be increased, the water quantity of the condensate pump is kept unchanged, so that the liquid level stability of the condenser is maintained, condensate water at the outlet of the shaft seal heater is sequentially conveyed to the heat accumulator through a condensate water supply pipeline and a heat accumulator cold water pipeline, and meanwhile, hot water of the heat accumulator is conveyed to the outlet of the low-pressure heater through a heat accumulator hot water pipeline, so that the liquid level stability of the deaerator is maintained. At this time, the amount of condensed water flowing through the low-pressure heater is reduced, the temperature of the water side is increased, and the saturation temperature and pressure of the steam side are also increased, so that the pressure difference of the extracted steam is reduced, and the amount of extracted steam is reduced, and then the reduced amount of extracted steam flows through the steam turbine, so that the output electric power is increased.
When the frequency of the power grid needs to be reduced, the water quantity of the condensate pump is increased, and the condensate at the outlet of the low-pressure heater is conveyed to the heat accumulator through the hot water pipeline of the heat accumulator, so that the liquid level stability of the deaerator is maintained. Meanwhile, the cold water of the heat accumulator is sequentially conveyed to the condenser through a cold water pipeline of the heat accumulator and a condensed water return pipeline, so that the liquid level of the condenser is kept stable. At this time, the amount of condensed water flowing through the low-pressure heater increases, the temperature of the water side decreases, and the saturation temperature and pressure of the steam side also decrease, so that the pressure difference of the extracted steam increases, the amount of extracted steam increases, and the amount of steam flowing through the steam turbine decreases, so that the output electric power decreases.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, which has the following peak shaving working principle:
when the unit needs peak shaving, the electric heat conversion device consumes electric energy sent by the power transmission line, cold water is heated by the heat storage heater, after the cold water is heated, the cold water is conveyed back to the heat storage device through the hot water pipeline of the heat storage device, the heat storage device stores heat, at the moment, the electric heat conversion device consumes electricity generated by the generator, and the online electric quantity of the unit is reduced. When the unit does not need peak shaving, the hot water of the heat accumulator is conveyed to the heat accumulator through the cold water pipeline of the heat accumulator after being heated by the hot network heater through the hot water pipeline of the heat accumulator and the heat accumulator releases heat, and the temperature of the hot network water is increased for heating.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, wherein an electrothermal conversion device is an electrode boiler, a heat pump, an electromagnetic boiler or a resistance boiler, and is equipment for converting electric energy into heat energy.
The comprehensive frequency modulation peak shaving system of the coal-fired power plant can partially or completely utilize electricity generated by the generator according to peak shaving requirements.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, wherein the heat accumulator is a heat storage device which uses water as a heat storage medium based on a water layering principle. Hot water in the heat accumulator is arranged on the upper part, and a water distributor is arranged in the heat accumulator; the cold water is arranged at the bottom, and a lower water distributor is arranged in the cold water; the middle part is an oblique temperature layer.
According to the comprehensive frequency modulation peak regulation system of the coal-fired power plant, when the condensation water quantity is reduced, the water side temperature rises, and the steam side saturation temperature and pressure rise, so that the steam extraction pressure difference is reduced, the steam extraction quantity is reduced, and the reduced steam extraction quantity flows through a steam turbine to increase the output electric rate; when the flow rate of the condensate water increases, the situation is contrary, and the output electric power is reduced, so that the purpose of frequency modulation is achieved. And in peak regulation time, the electric heating conversion device is used for consuming the power of the generator to generate electricity, so that the power on line is reduced, meanwhile, the heat accumulator stores heat, the thermal decoupling can be realized, the peak regulation purpose is achieved, and in non-peak regulation time, the heat accumulator is used for supplying heat, so that the flexibility of the coal-fired power plant is obviously improved.
In conclusion, the comprehensive frequency modulation peak shaving system of the coal-fired power plant can meet the peak shaving requirement of the coal-fired power plant and the frequency modulation requirement of a large power grid, and can improve the utilization rate of the existing heat accumulator equipment and remarkably improve the flexibility of the coal-fired power plant.
Drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Description of the embodiments
In fig. 1, the comprehensive frequency modulation peak shaving system of the coal-fired power plant comprises a heat accumulator 1, a heat accumulator cold water pipeline 2 arranged at the lower side of the heat accumulator, a heat accumulator hot water pipeline 3 arranged at the upper side of the heat accumulator, a condensate return pipeline 4 connected with the heat accumulator cold water pipeline, a condenser 5 connected with the condensate return pipeline, a steam turbine 6 connected with the condenser 3 through a pipeline, a generator 7 connected with the steam turbine, an electric heating conversion device 8 connected with the generator through a power transmission line, a heat accumulating heater 9 connected with the electric heating conversion device at one side and the heat accumulator cold water pipeline and the heat accumulator hot water pipeline at the other side through a heat accumulating pipeline 17, a heat net heater 10 connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat releasing pipeline 18, a condensate pump 11 connected with the condenser through pipelines, a heater 12 connected with a condensate pump at one end and a condensate shaft seal pipeline 19 at the other end, a low-pressure heater 13 connected with the heat accumulator hot water pipeline at the other end and a deaerator connected with the low-pressure heater through a pipeline 14 and a high-pressure pump connected with a water pump through a high-pressure heater 16; the heat supply network heater is a partition wall type heater and can heat the heat supply network water by using hot water of the heat accumulator; the heat accumulating heater is a partition wall type heater and can heat cold water in the heat accumulator by utilizing the electric heat conversion device.
The invention relates to a comprehensive frequency modulation peak shaving system of a coal-fired power plant, wherein the electric heating conversion device is an electrode boiler, a heat pump, an electromagnetic boiler or a resistance boiler.
In addition, in fig. 1, a heat supply network water inlet a and a heat supply network water outlet b.
In view of the foregoing, it should be noted that the present invention is not limited to the above-described specific embodiments, but rather should be construed as embodied in a generic and specific manner within the art; any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention will fall within the scope of the technical solution of the present invention, without departing from the scope of the technical solution of the present invention.
Claims (2)
1. The comprehensive frequency modulation peak regulation system of the coal-fired power plant is characterized by comprising a heat accumulator, a heat accumulator cold water pipeline arranged on the lower side of the heat accumulator, a heat accumulator hot water pipeline arranged on the upper side of the heat accumulator, a condensate return pipeline connected with the heat accumulator cold water pipeline, a condenser connected with the condensate return pipeline, a steam turbine connected with the condenser through a pipeline, a generator connected with the steam turbine, an electric heating conversion device connected with the generator through a power transmission line, a heat accumulating heater connected with the electric heating conversion device on one side, a heat accumulating heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline on the other side through a heat accumulating pipeline, a heat supply network heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat releasing pipeline, a condensate pump connected with the condenser through pipelines, a low-pressure heater connected with the condensate water supply pipeline on one end, a low-pressure heater connected with the other end, a low-pressure heater connected with the low-pressure heater through a pipeline, a high-pressure pump connected with the heat accumulating pump through a deaerator water supply pipeline; the heat supply network heater is a partition wall type heater and can heat the heat supply network water by using hot water of the heat accumulator; the heat accumulating heater is a partition wall type heater and can heat cold water in the heat accumulator by utilizing the electric heat conversion device.
2. The comprehensive frequency modulation peak shaving system of the coal-fired power plant according to claim 1, wherein the electric heat conversion device is an electrode boiler, a heat pump, an electromagnetic boiler or a resistance boiler.
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| CN202010190255.4A CN111256192B (en) | 2020-03-18 | 2020-03-18 | Comprehensive frequency modulation peak regulation system for coal-fired power plant |
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| CN202010190255.4A CN111256192B (en) | 2020-03-18 | 2020-03-18 | Comprehensive frequency modulation peak regulation system for coal-fired power plant |
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| CN111256192B true CN111256192B (en) | 2024-02-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111678119A (en) * | 2020-07-16 | 2020-09-18 | 西安热工研究院有限公司 | Boiler wet-state water recovery system under low load of coal-fired unit and working method |
| CN112344317A (en) * | 2020-10-23 | 2021-02-09 | 广西投资集团北海发电有限公司 | Condensed water frequency modulation device with heat storage system |
| CN114607479B (en) * | 2022-03-17 | 2023-11-07 | 西安热工研究院有限公司 | Energy storage peak regulation system for recovering waste heat of thermal power plant thermodynamic system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293344A (en) * | 1999-10-19 | 2001-05-02 | 北京科技大学 | Technique for accumulating heat by electric energy in low vally at night and heating or refrigerating at daytime |
| CN107171350A (en) * | 2017-07-17 | 2017-09-15 | 赫普热力发展有限公司 | A kind of power peak regulation system and method |
| CN207621981U (en) * | 2017-12-13 | 2018-07-17 | 金大地新能源（天津）集团股份有限公司 | Steam power plant carries out peak regulation and its heating and refrigerating system using electrode water storage boiler |
| CN208186476U (en) * | 2018-04-11 | 2018-12-04 | 赫普科技发展（北京）有限公司 | Electrode boiler combines heat accumulation water pot power grid depth peak regulation system |
| WO2018233024A1 (en) * | 2017-06-22 | 2018-12-27 | 赫普热力发展有限公司 | Thermoelectric decoupling peak load regulating system |
| CN208594973U (en) * | 2018-08-07 | 2019-03-12 | 西安热工研究院有限公司 | It is a kind of to combine frequency modulation peak regulation system using electrochemical energy storage coupling condensed water heat accumulation |
| CN211781361U (en) * | 2020-03-18 | 2020-10-27 | 青岛达能环保设备股份有限公司 | Comprehensive frequency modulation and peak regulation device for coal-fired power plant |
-
2020
- 2020-03-18 CN CN202010190255.4A patent/CN111256192B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293344A (en) * | 1999-10-19 | 2001-05-02 | 北京科技大学 | Technique for accumulating heat by electric energy in low vally at night and heating or refrigerating at daytime |
| WO2018233024A1 (en) * | 2017-06-22 | 2018-12-27 | 赫普热力发展有限公司 | Thermoelectric decoupling peak load regulating system |
| CN107171350A (en) * | 2017-07-17 | 2017-09-15 | 赫普热力发展有限公司 | A kind of power peak regulation system and method |
| CN207621981U (en) * | 2017-12-13 | 2018-07-17 | 金大地新能源（天津）集团股份有限公司 | Steam power plant carries out peak regulation and its heating and refrigerating system using electrode water storage boiler |
| CN208186476U (en) * | 2018-04-11 | 2018-12-04 | 赫普科技发展（北京）有限公司 | Electrode boiler combines heat accumulation water pot power grid depth peak regulation system |
| CN208594973U (en) * | 2018-08-07 | 2019-03-12 | 西安热工研究院有限公司 | It is a kind of to combine frequency modulation peak regulation system using electrochemical energy storage coupling condensed water heat accumulation |
| CN211781361U (en) * | 2020-03-18 | 2020-10-27 | 青岛达能环保设备股份有限公司 | Comprehensive frequency modulation and peak regulation device for coal-fired power plant |
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