A Power Generation System Utilizing Latent Heat of Vaporization of Exhaust Smoke from Natural Gas Power Plant

Abstract

The invention discloses a power generation system utilizing the latent heat of vaporization of exhaust smoke from a natural gas power plant. The system proposes a compound combined cycle power generation unit for an oxygen-enriched combustion natural gas power plant. The flue gas after oxygen-enriched combustion passes through a gas turbine GT, The gas power cycle power generation unit A and the organic Rankine cycle power generation unit B can fully recover the latent heat of vaporization in the flue gas, reduce the exhaust gas temperature below normal temperature, and then separate the CO in the flue gas 2 and water to achieve carbon capture C. In the present invention, the gas power cycle is used to avoid the phase change of the heat exchange medium and improve the heat exchange effect; the organic Rankine cycle is used to fully recover the latent heat of vaporization in the flue gas, which greatly improves the power generation efficiency of the system; the present invention can effectively solve the problem of low temperature flue gas The latent heat of vaporization of middle water vapor is generally wasted, the energy consumption of carbon capture is high, and the cold energy of LNG is seriously wasted. At the same time, the power generation efficiency of the system is improved, and an energy-saving, environmentally friendly, and efficient integrated power generation system is truly realized.

Description

technical field

[0001] The invention belongs to energy technology and power industry to realize CO 2 The field of zero-emission high-efficiency power generation system, more specifically, relates to a power generation system that utilizes the latent heat of vaporization of exhaust smoke from a natural gas power plant. Background technique

[0002] LNG is liquefied natural gas with a temperature of about -162°C under normal pressure. The gasification process will release about 830kJ / kg of cooling capacity, which has great utilization value. However, from a global perspective, the utilization rate of LNG cold energy is only about 20%, and the utilization rate of cold energy resources is low. Serious waste. In addition, the greenhouse effect has intensified, and my country is facing severe pressure to reduce emissions. Studies have shown that CO in the atmosphere 2 It is one of the gases that have the greatest impact on the greenhouse effect. Carbon capture and storage (C...

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