Method and device for improving grade of medium-and-low-temperature solar thermal power and integrally separating CO2

Abstract

The invention discloses a method and a device for improving the grade of medium-and-low-temperature solar thermal power and integrally separating CO2. According to the method, a palladium base alloy membrane structure with very strong hydrogen permeation property is introduced into a methane / water vapor reforming reaction, thereby greatly improving reaction conditions, increasing percent conversion rate of methane and realizing CO2 separation. 200 DEG C cyclone separator trench type solar is used for providing latent heat of vaporization for reforming vapor, the latent heat of vaporization is converted into vapor internal energy, and the vapor internal energy is converted into synthesis gas chemical energy. 550 DEG C light-concentrating tower-type solar is used for providing reaction heat needed by the reforming reaction and the reaction heat is directly converted into synthesis gas chemical energy. Thus, grade is improved. Finally, conversion of heat into power is realized in a high-efficiency fuel gas-vapor combined circulating system. By the method and the device provided by the invention, the high-efficiency conversion of medium-and-low-temperature solar thermal power and comprehensive gradient utilization of medium-and-low-temperature solar thermal power and fossil fuel which are complementary to each other are realized; moreover, the integral separation of CO2 is also realized.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a medium and low temperature solar heat grade improvement and CO 2 Integrated separation method and device. Background technique [0002] At present, the technologies related to the present invention mainly include medium and low temperature solar energy utilization technology, membrane reactor technology and CO in the energy system. 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 limited nature of fossil energy and the seriousness of pollution generated in the process of utilization, the effective utilization 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 attracted widespread attention due to its unique advan...

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Problems solved by technology

[0021] 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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