System and method for producing hydrogen by collecting solar energy in multi-plate mode and coupling biomass supercritical water gasification

Abstract

The invention relates to a system and a method for producing hydrogen by collecting solar energy in a multi-plate mode and coupling biomass supercritical water gasification. The system comprises a cavity-type solar energy absorption reactor used for absorbing the heat of the solar energy to drive biomass supercritical water gasification hydrogen producing reaction, a preheater used for providing heat for preheating water when the irradiance of the solar energy is not enough, or the fluctuation is larger, and a heat exchanger used for recovering heat and improving the transformation efficiencyof the system energy. The method comprises the following steps: adopting multi-plate light condenser tracking and focusing solar energy for providing the heat source; preheating the high-pressure biomass materials to the temperature of 180-240 DEG C; recovering and reacting by a heat exchanger; introducing the high-temperature liquid heat into the preheater; mixing the high-temperature and high-pressure preheating water at the inlet of a solar energy absorption reactor in a certain proportion, and rapidly heating the materials to supercritical water gasification hydrogen manufacturing. The system and method provided by the invention are beneficial for realizing hydrogen production in high efficiency by focusing solar energy and thermally coupling biomass supercritical water gasification with low cost in large scale.

Description

technical field [0001] The invention belongs to the field of renewable energy scale preparation of solar heat utilization and biomass thermochemical conversion gasification hydrogen production, and relates to a multi-disc solar heat concentrating coupled biomass supercritical water gasification hydrogen production system, in particular to a multi-disk system Hydrogen production method of solar heat concentrating coupling biomass supercritical water gasification. Background technique [0002] At present, mankind is facing two related challenges: the increasing energy demand exacerbates the depletion of hydrocarbon fuels, and the CO 2 Massive emissions contribute to global climate change. In order to maintain the current standard of living and establish an environmentally friendly and sustainable energy supply system, these challenges must be solved in conjunction with CO 2 Combining the development and implementation of "zero" emission systems, the development and utilizati...

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Problems solved by technology

[0008] (2) When the optimal reaction conditions (heating rate, temperature, pressure, reaction residence time, etc.) are not reached, the reaction gasification is not complete and it is easy to generate tar, coke, etc., resulting in reactor blockage, slagging, and low gasification rate, thereby failure of the continuous gasification reaction

[0009] (3) It is difficult to achieve the rapid temperature rise conditions and a large amount of heat required for gasification reaction with external heating

[0010] (4) Effective cascade recycling of energy is not considered comprehensively, resulting in low energy conversion efficiency of the system

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