Biogas and solar energy complementary two-stage preparation system and method for synthesis gas

Abstract

The invention discloses a biogas and solar energy complementary two-stage preparation system and method for a synthesis gas. The system comprises a first three-way valve, a second three-way valve, a primary heat regenerator, a primary reactor, a third three-way valve, a secondary heat regenerator, a secondary reactor and a solar heat collector. The method comprises the steps: shunting desulfurizedbiogas to form a first part of desulfurized biogas and a second part of desulfurized biogas; mixing the first part of desulfurized biogas with steam, then, carrying out preheating, next, absorbing heat energy converted from solar energy in the primary reactor, and carrying out a reforming reaction to generate a reforming reaction product; cooling the reforming reaction product, then, mixing the reforming reaction product with the second part of desulfurized biogas, carrying out preheating, then, absorbing heat energy converted from solar energy in the secondary reactor, carrying out a reforming reaction, carrying out cooling, and then, outputting a product. The heat energy grade of the solar energy is improved to the chemical energy grade of the synthesis gas by integrating solar heat collection and two-stage biogas reformation, so that the consumption of water is reduced, and the economical efficiency of biogas and solar energy utilization is increased.

Description

technical field [0001] The invention relates to the field of solar energy utilization and energy technology, and in particular to a two-stage syngas preparation system and method that integrates key unit technologies such as solar heat collection and biogas reforming, which are complementary to biogas and solar energy. Background technique [0002] my country is rich in biomass resources, and biogas has become an important way to utilize biomass. my country's biogas generation system has borrowed from foreign mature technologies and has developed in the direction of large and medium-sized biogas generation systems; however, biogas utilization technology is relatively backward, and biogas utilization efficiency is low Low problem. The complementary utilization of multiple renewable energy sources has the potential to improve energy utilization efficiency and energy supply quality, and reduce energy supply costs, and has become a hot technology in the field of renewable energy....

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Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a two-stage system and method for syngas production in which biogas and solar energy are complementary, so as to solve the problems of low methane conversion rate and easy deactivation of common commercial catalysts in the biogas reforming reaction , to improve the thermal performance of the system

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