Combined heat and power generation system based on solar energy integrated oxygen-enriched combustion and chemical looping combustion and working method thereof

Abstract

The invention discloses a combined heat and power generation system based on solar energy integrated oxygen-enriched combustion and chemical looping combustion and a working method thereof. A solar thermal chemistry process and a fuel power cycle are organically coupled by the system, so that the step utilization of the solar energy is realized; on one hand, a reduced oxygen-carrying body is usedfor converting the solar energy into chemical energy to be stored in an oxygen-carrying body heat accumulator, necessary heat energy is provided for the chemical looping combustion; and on the one hand, the characteristic that the CO2 is released by absorbing CO2 through the photosynthesis of microalgae under light illumination is utilized, pure O2 is provided for the oxygen-enriched combustion, and secondary air is provided for an air reactor; in addition, by complementary integration of the oxygen-enriched combustion system and the chemical looping combustion system, and the reasonable and efficient utilization of the fuel is realized; and meanwhile, the pure CO2 generated through oxygen-enriched combustion and chemical looping combustion is used for pushing a turbine to generate electricity for heat supply, so that the problem of high energy consumption and high cost due to the fact that CO2 is trapped and separated is solved, the CO2 flue gas waste heat can be effectively utilized.

Description

technical field [0001] The present invention relates to a control CO 2 The emission-based cogeneration system of solar energy and integrating oxygen-enriched combustion and chemical loop combustion and its working method belong to the field of solar thermal power generation and energy technology. Background technique [0002] CO in Earth's atmosphere since industrial civilization 2 The concentration has risen sharply due to human production activities. CO 2 As a typical greenhouse gas, it directly leads to the greenhouse effect. Currently, CO 2 The emission reduction can be achieved by adjusting the energy structure and improving energy conversion and utilization efficiency. [0003] From the perspective of adjusting the energy structure, renewable energy, especially solar energy, is currently of particular concern. At present, the main direction of solar energy utilization technology is solar photoelectric conversion and photothermal conversion. However, due to the d...

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Problems solved by technology

[0008] One of the purposes of the present invention is to provide a method based on the traditional oxygen-enriched combustion that requires large-scale air separation to produce oxygen, which requires large investment and high energy consumption, which reduces the economy and energy utilization efficiency of the oxygen-enriched combustion system. Solar energy integrated oxyfuel combustion and chemical looping combustion combined heat and power system, the combined heat and power system can not only improve the economy and energy utilization efficiency of the oxyfuel combustion system, but also alleviate the sintering of oxygen carrier particles in chemical looping combustion, etc. technical issues and can capture CO at low cost and low energy consumption 2 , to be recycled

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