Light energy access coal-fired unit and light-coal energy complementary load adjusting method
A technology for coal-fired units and load regulation, which is applied in the fields of solar thermal energy, mechanical power generation with solar energy, and mechanical equipment, etc. Improve the effect of large delay and large inertia, and increase power generation
Pending Publication Date: 2021-12-31
JILIN ELECTRIC POWER RES INST LTD +2
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Problems solved by technology
However, when external heat is used for coal-fired units to generate electricity, the effect will be very different depending on where the heat is introduced. In some places, although the renovation and construction are not difficult, the heat conversion efficiency is very low; in some places, although the heat conversion efficiency is high , but the transformation is difficult, costly, and even difficult to realize
In addition, the solar heat collector can quickly increase or decrease the temperature of the return water by rapidly changing the output flow, and the adjustment range is large. However, there is no complete, effective, common method
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[0028] As shown in the figure, the method of connecting solar energy to coal-fired units includes two parts: the coal-fired power plant system and the solar energy collection and storage system. Coal-fired power plant systems such as figure 1 Shown include: steam turbine high pressure cylinder 1, steam turbine medium pressure cylinder 2, steam turbine low pressure cylinder 3, generator 4, first high pressure feed water heater 5, second high pressure feed water heater 6, third high pressure feed water heater 7, feed water pump 8. Deaerator 9, first low-pressure feedwater heater 10, second low-pressure feedwater heater 11, third low-pressure feedwater heater 12, fourth low-pressure feedwater heater 13, condensate pump 14, condenser 15, oil-water exchange Heater 16, valve 17, heat storage oil tank 18 and solar heat collection field 19, wherein, solar heat collection field 19 is connected with one side of heat storage oil tank 18, can store the solar energy collected in heat stora...
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The invention discloses a light energy access coal-fired unit and a light-coal energy complementary load adjusting method, and belongs to the technical field of coal-fired unit rapid variable load control. In combination with multidisciplinary knowledge of engineering thermodynamics, a boiler principle, a steam turbine technology and the like, according to the fact that a heat storage oil tank with solar energy as a heat source has a high heat storage depth, and by considering boiler operation characteristics of a coal-fired power generation unit, a set of perfect light energy access coal-fired unit and light-coal energy complementary load adjusting method is provided. A water supply heat regenerative system of the coal-fired power generation unit is fully coupled with a solar heat storage system, and the time is provided for the coal supply amount of a boiler to reach the required load response while the load is quickly adjusted by utilizing the thermal inertia of the boiler operation of the coal-fired power generation unit. Coal resources are saved, and the efficiency of the power generation unit is improved. Solar energy serves as second energy to be added into the power generation unit, the generating capacity of a coal-fired unit system is improved, the utilization rate of energy is improved through complementation of the solar energy and fire coal, and efficient utilization of the fire coal is achieved.
Description
technical field [0001] The invention belongs to the technical field of fast variable load control of coal-fired units, and in particular relates to a light energy access coal-fired unit and a light-coal energy complementary load adjustment method. Background technique [0002] With the large-scale grid connection of new energy, the impact of the instability and volatility of new energy on the power system has gradually emerged. In order to ensure the safety of power supply in the grid, it is necessary to improve the flexibility of the grid system. In my country, coal-fired units are the main body to ensure stable power output in the power grid power generation system. In order to improve the flexibility of the grid system, the flexibility of coal-fired units must be improved. Therefore, the load regulation ability of coal-fired units determines whether new energy can be used scale grid connection. However, due to the limitations of the structural characteristics of the coal-...
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IPC IPC(8): F24S20/40F24S50/40F24S60/30F01K11/02F01K13/02F01K25/10F03G6/00
CPCF24S20/40F24S60/30F24S50/40F03G6/005F01K11/02F01K13/02F01K25/10Y02E10/46
Inventor 周驰王迪王松寒王忠言司瑞才王春玲耿娜黄振群刘希闻李佳姚卓宏杨小芬
Owner JILIN ELECTRIC POWER RES INST LTD