Low-CO2-emisison solar energy and methanol complementary thermodynamic cycle system and method

Abstract

The invention discloses a low-CO2-emisison solar energy and methanol complementary thermodynamic cycle system and a low-CO2-emisison solar energy and methanol complementary thermodynamic cycle method. A solar energy grade is improved in combination with an efficient combined cycle system. The method comprises the following steps of: providing methanol / steam reforming reaction heat by using intermediate-and-low temperature solar energy, and converting a fuel into synthesis gas in which H2 and CO2 with the approximate molar ratio of 3:1 are used as main ingredients, so that low-grade solar energy is converted into synthesis gas chemical energy; separating the CO2 by using an absorption unit; and performing heat-into-power conversion on the decarburized clean fuel in an efficient combined cycle process. The introduction of the solar energy is combined with the separation of the CO2, so that the consumption of fossil energy is reduced, and the fuel can be utilized cleanly. By the method, the clean conversion efficiency of the solar energy is 16.8 percent, the equivalent efficiency of the system is 55.1 percent which is 1 percent higher than that of the conventional combined cycle process, and the conservation rate of a fossil fuel can reach 11.8 percent; and the discharge capacity of the CO2 can be reduced at low energy consumption, so that the fossil fuel is saved, and the intermediate-and-low temperature solar energy can be subjected to efficient heat-into-power conversion and can be complemented with the fossil fuel.

Description

Technical field [0001] The invention relates to the field of energy technology, in particular to a low CO 2 A thermal cycle system and method in which discharged solar energy and methanol are complementary. Background technique [0002] At present, the technologies related to the present invention mainly include medium and low temperature solar energy utilization technology and CO in energy systems 2 The development status and characteristics of their respective technologies are as follows: [0003] 1. Medium and low temperature solar energy utilization technology [0004] In view of the limitation of fossil energy and the seriousness of pollution during its utilization, the effective use of new clean energy (such as solar energy, wind energy, geothermal energy, etc.) has become an important aspect of sustainable development. In recent years, solar energy has received widespread attention due to its unique infinite reserves, universality, cleanness of development and utilization, an...

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Problems solved by technology

[0014] Separation of CO after combustion 2 It is the most common and the easiest separation measure to think of, because the CO of the flue gas after combustion 2 The concentration is generally low, and the chemical absorption method is generally used for separation, because CO is removed from the tail gas 2 In addition to the acid gas, there are nitrogen and sulfur oxides and metal pollutants, which bring a lot of trouble to the subsequent absorption

And separate CO 2 Low concentration, large amount of exhaust gas, separation of CO 2 Energy consumption has a great impact on system performance, generally reducing system efficiency by 10-15%;

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