Concentrated solar energy-driven nanofluid gasification biomass system to produce syngas

Abstract

The invention belongs to the related technical field of solar heat utilization and biomass conversion and utilization, and discloses a system for concentrating solar energy to drive nanofluid to gasify biomass to prepare syngas. The system uses nanofluid as heat transfer and heat storage medium, which includes Solar concentration system, solar direct heat absorption tank, nanofluid heat storage tank, steam supply system, gasification reaction system and working condition control system; the gasification system is used to mix biomass with water vapor from the gas supply system The gasification reaction is carried out under the action of the heated nanofluid to obtain syngas; the nanofluid heat storage tank is used to store the heated nanofluid for heat storage and replenish the nanofluid to the gasification system according to the instructions of the working condition control system ; The operating condition control system is also used to control the working mode of the steam supply system and the gasification reaction system according to the actual operating state of the system. The invention is easy to adjust flexibly to adapt to various environments, improves stability and economy, and ensures production efficiency.

Description

technical field [0001] The invention belongs to the related technical field of solar energy utilization and biomass conversion and utilization, and more specifically relates to a system for preparing synthesis gas by gasifying biomass with concentrated solar nanofluid. Background technique [0002] The global consumption of fossil energy is increasing day by day, but the relative reserve of chemical energy is gradually decreasing. This contradiction will lead to an energy crisis; at the same time, the pollution and emission problems caused by the massive consumption of fossil fuels are also becoming more and more serious, which is not in line with the acceptable requirements for sustainable development. So people urgently need to find a kind of renewable energy as an alternative. Biomass has a wide range of sources and is the only carbon-containing renewable energy. It can be converted into usable fuel by various means, especially biomass gasification technology, which can ...

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Problems solved by technology

[0003] However, further studies have found that when directly using solar energy to drive biomass gasification technology (1) the ash formed when heated by external focused radiation will isolate the reaction zone and reduce radiative heat transfer, thereby seriously hindering the progress of the reaction; (2) in the In direct solar reactors, tar will adhere to the light-gathering incident window, resulting in local high-temperature rupture; (3) The position of the sun and the intensity of radiation vary with time, resulting in transient changes in the incident energy flux density on the surface of the solar reactor, and the gas The temperature of the gasification reaction also fluctuates, and sometimes it is not enough to maintain the reaction. Therefore, poor heat transfer, by-product contamination and unstable irradiation are the key issues restricting the development of concentrating solar-powered gasification technology.

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