Power generating system and method by combining medium-and-low temperature solar energy with fossil fuel thermochemistry

A generating system by combining medium-and-low temperature solar energy and fossil fuel with thermochemical process, comprising:

• a material supply device configured to store fossil fuel and output the stored fossil fuel to a material mixing device;
• a material mixing device configured to receive and mix the fossil fuel from the material supply device with non-reacted reactant separated from a gas-liquid separating device and output the resultant mixture to a material metering device;
• a material metering device configured to control an amount of material fed to a material preheating device in unit time, so as to output the mixed material received from the material mixing device in a certain rate to a material preheating device;
• a material preheating device configured to heat the material received from the material metering device by using the exhaust heat from the power generating apparatus, to generate fossil fuel vapor and output it to a solar energy absorption and reaction device;
• a solar energy absorption and reaction device configured to drive the fossil fuel vapor received from the material preheating device by using solar thermal energy absorbed to make a decomposition reaction or reforming reaction by catalysts, through which the solar energy is converted to chemical energy of hydrogen-rich fuel, obtaining solar-energy fuel;
• a solar energy heat collecting device configured to collect the solar energy with low energy flux density to medium-and-low temperature solar thermal energy with high energy flux density in manner of line focus, so as to provide heat to the reaction of conversion of a fossil fuel to a solar energy in the solar energy absorption and reaction device;
• a condenser configured to cool reaction products from the solar energy absorption and reaction device and output the cooled reaction products to the gas-liquid separating device;
• a gas-liquid separating device configured to perform gas-liquid separation for the cooled mixture received from the condenser and output the separated gas phase reaction products and liquid phase reaction products to the fuel bypassing device and the material mixing device, respectively;
• a fuel bypassing device configured to control the flow of the solar-energy fuel to the power generating apparatus and the gas storing tank according to the solar energy source and energy demands from user, so as to achieve adjustment and control of the power generating system by combining solar energy and fossil fuel with thermochemical process;
• a gas storing tank configured to store the excess solar-energy fuel when solar energy source is abundant, achieving chemical energy storage, and, when solar energy source is not sufficient, complement the solar-energy fuel in the gas storing tank to the power generating apparatus, thereby achieving output control of the system;
• and
• a power generating apparatus configured to drive a generating set to generate by using solar-energy fuel as fuel and output electrical power.