Supercritical carbon dioxide Brayton and steam Rankine combined cycle thermal power generation system
A Brayton cycle and carbon dioxide technology, which is used in steam generation, steam superheating, and steam boilers, etc., can solve the problem of not ensuring the safe operation of the air preheater in the flue at the tail of the boiler, and achieve the goal of improving power generation efficiency and reducing exhaust gas temperature. Effect
Active Publication Date: 2018-06-22
XIAN THERMAL POWER RES INST CO LTD +1
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Problems solved by technology
[0006] However, according to research, there are very few domestic and foreign published achievements and patents on the combined cycle thermal power generation system based on the supercritical carbon dioxide Brayton cycle. The problem of cascade utilization of gas heat, and the existing supercritical carbon dioxide Brayton cycle power generation system cannot guarantee the safe operation of the air preheater in the boiler tail flue
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[0018] The present invention is described in further detail below in conjunction with accompanying drawing:
[0019] refer to figure 1 The supercritical carbon dioxide Brayton and steam Rankine combined cycle thermal power generation system described in the present invention comprises a supercritical carbon dioxide Brayton cycle power generation system and a steam Rankine cycle system, and the heater 34 in the steam Rankine cycle system is located at the supercritical carbon dioxide In the tail flue of the boiler 3 in the Brayton cycle power generation system, and the heater 34 in the steam Rankine cycle power generation system is located between the economizer 31 and the air preheater 35 in the supercritical carbon dioxide Brayton cycle power generation system.
[0020] The steam Rankine cycle system includes a heater 34, a steam turbine 8, a water pump 7, a steam condenser 10 and a steam cycle generator 9, the output shaft of the steam turbine 8 is connected with the drive s...
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The invention discloses a supercritical carbon dioxide Brayton and steam Rankine combined cycle thermal power generation system, which includes a supercritical carbon dioxide Brayton cycle power generation system and a steam Rankine cycle system. The heater in the steam Rankine cycle system is located in the supercritical carbon dioxide Brayton cycle power generation system. In the tail flue of the boiler in the Brayton cycle power generation system, and the steam The heater in the Rankine cycle system is located between the economizer and the air preheater in the supercritical carbon dioxide Brayton cycle power generation system. This system can realize the cascade utilization of the heat of the supercritical carbon dioxide boiler flue gas and ensure that the heat in the tail flue of the boiler is The air preheater operates safely, reduces the exhaust gas temperature of the boiler, and improves the thermal efficiency of the boiler.
Description
technical field [0001] The invention belongs to the field of supercritical carbon dioxide high-efficiency thermal power generation, and relates to a supercritical carbon dioxide Brayton and steam Rankine combined cycle thermal power generation system. Background technique [0002] The efficiency of generating units has an important impact on the development of the national economy and environmental protection. The composition characteristics of my country's energy reserves determine that thermal power generating units will still be the main force in my country's power industry in the next few decades. Therefore, improving the efficiency of thermal generating units It is particularly important in our country. [0003] Improving the steam parameters of supercritical and ultra-supercritical units can effectively improve the efficiency of thermal power generation systems. Increasing the main steam parameter to 700°C can increase the power generation efficiency of the steam Ranki...
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IPC IPC(8): F22B31/08F22D1/00F22G7/12F23J15/06
CPCF22B31/08F22D1/003F22G7/12F23J15/06
Inventor 张一帆王月明李红智姚明宇高炜吴帅帅
Owner XIAN THERMAL POWER RES INST CO LTD