A new type of supercritical CO suitable for the field of coal-fired power generation 2 Compound circulatory system
A technology of circulation system and top circulation system, which is applied in the directions of machines/engines, steam engine installations, lighting and heating equipment, etc., can solve the problems of low circulation efficiency, reduced circulation thermal efficiency of power generation system, and reduced system power generation efficiency.
Active Publication Date: 2020-11-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0007] This problem can be solved by building a compound cycle, but the effect of different compound cycles is different. If the compound cycle is not constructed properly, the power generation efficiency of the system will be reduced. The reduction of system power generation efficiency can be understood from two aspects. 1. If the flue gas If the waste heat is not fully absorbed, the boiler efficiency of the power generation system will decrease. 2. The waste heat of the flue gas is absorbed, but the cycle efficiency is low, so the cycle heat efficiency of the power generation system will be reduced
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[0028] A new type of supercritical CO suitable for the field of coal-fired power generation of the present invention is further described below with reference to the accompanying drawings. 2 Embodiments of compound circulation systems;
[0029] like figure 1 As shown, this embodiment includes: a top circulation system 100, a bottom circulation system 200 and an air preheater heat absorption system 300, wherein each heater in the top circulation system 100 is arranged in the furnace, the front section of the horizontal flue and the tail flue Inside, the heater of the bottom circulation system 200 is arranged in the middle section of the boiler tail flue, the flue gas first flows through the top circulation system 100 and then flows through the bottom circulation system 200, and the flue gas flowing through the bottom circulation system 200 enters the rear section of the tail flue. The internal air preheater heat absorption system 300, the three systems work together to absorb ...
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The invention discloses a novel supercritical CO2 compound circulation system applicable for the field of coal-fired power generation, and belongs to the field of high-efficiency power generation equipment. The compound circulation system is composed of a top circulation system, a bottom circulation system and an air preheater heat absorption system, and heat generated by coal combustion in a boiler is absorbed by the three systems jointly, wherein the top circulation is secondary reheating and recompression circulation; the bottom circulation is graded heating circulation, and the bottom circulation system is composed of a bottom circulation cooler, a bottom circulation first compressor, a bottom circulation low-temperature regenerator, a bottom circulation second compressor diverter valve, a bottom circulation second compressor, a bottom circulation high-temperature regenerator, a first tail flue heater diverter valve, a first tail flue heater, a bottom circulation first turbine, a second tail flue heater and a bottom circulation second turbine. Through the bottom circulation, within the inlet temperature range of 580-640 DEG C of a top circulation turbine, the compound circulation system is higher in efficiency, and the safe operation of an air preheater is ensured.
Description
technical field [0001] The invention belongs to the field of high-efficiency power generation equipment, and in particular relates to a novel supercritical CO2 suitable for the field of coal-fired power generation 2 Compound circulatory system. [0002] technical background [0003] supercritical carbon dioxide Brayton cycle (S-CO 2 In recent years, extensive research has been carried out in the fields of sodium-cooled fast reactor power generation, tower solar thermal power generation, and utilization of waste heat from gas turbine flue gas. This study was carried out under the condition that the related technologies of the water vapor Rankine cycle are relatively mature, because compared with the water vapor Rankine cycle S-CO 2 Loops can offer some very attractive advantages. [0004] For example, at the same turbine inlet temperature, S-CO 2 Compared with the steam Rankine cycle, the cycle can have higher efficiency in the mesophilic region (550°C-700°C). In addition...
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IPC IPC(8): F01K25/10F01K21/00F01K13/00F01D15/10F23J15/06
CPCF01D15/10F01K13/00F01K21/00F01K25/103F23J15/06
Inventor 孙恩慧徐进良雷蕾郑雅文刘广林胡涵
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)