Direct combustion heating type supercritical carbon dioxide power cycle system and method

Abstract

The invention discloses a direct combustion heating supercritical carbon dioxide power cycle system and method. The system includes a pump, the outlet of the pump is connected to the regenerator, the low pressure side of the regenerator is connected to the first cooler, the water separator, the compressor, the second cooler, and the gas separator, and the bottom of the gas separator is connected to the pump. Inlet; the high pressure side of the regenerator forms a loop through the burner and the turbine in turn, and the turbine is connected to the generator. The method is as follows: the carbon dioxide is pressurized by the pump and then sent into the regenerator, the carbon dioxide is heated in the regenerator and sent to the burner, the high temperature mixed medium enters the turbine to drive the generator, the mixed medium at the turbine outlet enters the regenerator, and the The heated mixed medium enters the cooler to liquefy the water, and after passing through the water separator, the gaseous medium enters the compressor. The nitrogen oxide emissions of the present invention can be controlled either in the combustion process or in the after-treatment of the exhaust gas, or directly emitted under permissive conditions.

Description

technical field [0001] The invention relates to a direct combustion heating supercritical carbon dioxide power cycle system and method. Background technique [0002] Clean, efficient, and economical are the core goals pursued by the progress of power generation technology. Finding new energy forms to replace traditional fossil energy and developing new and more advanced energy conversion methods are the two directions to achieve this goal. In today's world, fossil fuel power generation will still occupy the dominant position in the power structure for a long time, so improving power generation efficiency, reducing emissions, and reducing power generation costs are the main directions of technological innovation. [0003] In recent years, the supercritical carbon dioxide power cycle has become a research hotspot and is considered to have many potential advantages. The critical point of carbon dioxide is 31°C / 7.4MPa, and the state is supercritical when the temperature and pre...

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Problems solved by technology

At present, more research in the industry is to use pure oxygen combustion instead of air combustion to avoid the production of nitrogen oxides, but the problem caused by this is that the system needs to be equipped with an air separation device to supply oxygen, and the air separation device is integrated in the entire system. A large proportion of the cost

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