A combined solar system auxiliary power plant water supply and co 2 integrated system of capture

Abstract

The invention discloses a combined-type-solar-system power-plant water-feeding and CO2-collecting assisted integrated system. The combined-type-solar-system power-plant water-feeding and CO2-collecting assisted integrated system is mainly composed of a coal burning thermal power generation subsystem, a chemical-absorption-method CO2 collecting subsystem, a combined-type solar heat collecting subsystem and a plurality of heat exchangers. Connecting and switching are carried out on the subsystems mainly through the heat exchangers, relative pipes and relative valves. As different combination modes are achieved according to the optimal heat collecting temperature of medium and low temperature solar heat collectors, and different connecting modes are adopted for the heat output end of the combined-type solar heat collecting subsystem, the energy requirement grades of related parts among the combined-type solar heat collecting subsystem, the coal burning thermal power generation subsystem and the chemical-absorption-method CO2 collecting subsystem are reasonably distributed and integrated, the gradient use of energy is achieved, the energy consumed when steam is pumped from a power plant steam turbine can be greatly reduced, the multiple effects of achieving use of the renewable energy sources, improving the power plant energy efficiency, reducing emission of CO2 and the like are achieved while the power plant stability is maintained, and large-scale application of the solar and smoke collecting integrating technology is promoted.

Description

technical field [0001] The invention relates to a kind of solar energy auxiliary power plant feed water heating and CO 2 Capture integrated technology, specifically related to a combined medium and low temperature solar heat collection system to assist power plant recuperation and CO in flue gas 2 Integrated system and method for capturing, utilizing solar energy to simultaneously provide feedwater preheating and CO 2 The energy compensation of the capture system, while realizing the combined heat collection of medium and low temperature solar collectors, fully realizes the cascade utilization of energy, effectively reduces the irreversible loss during the steam extraction process, and makes up for the use of steam extraction for CO 2 Impact of capture on power plants. Background technique [0002] At present, coal-fired thermal power generation still occupies a dominant position in China's power structure. Although the technology is relatively mature, it needs to consume ...

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Problems solved by technology

[0007] In view of the high energy consumption of the current capture system and the irreversible loss of high-grade steam caused by steam extraction and capture, the present invention proposes a cascade utilization combined solar heat collection auxiliary power plant feedwater heating and CO 2 The integrated system of capture realizes solar energy and CO 2 The different integrated connections between capture and power plant feedwater heating make full use of medium and low temperature solar heat collection to compensate the energy consumption demand of traditional capture systems and power plant feedwater heating systems, while realizing cascaded utilization of solar energy, effectively reducing the power plant's steam extraction The resulting drop in efficiency

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