Regional energy supply system based on biogas-photo-thermal coupling

The invention relates to the field of anaerobic digestion technology and regional energy supply, in particular to a regional energy supply system based on biogas-photo-thermal coupling, which is used for supplying energy and heat to urban and rural regions. The device mainly comprises a heat preservation water tank, a groove type solar heat collector, a biogas boiler and an anaerobic digestion reactor. The iron-carbon auxiliary agent is utilized to realize anaerobic digestion methane production and improve quality and efficiency, and fuel gas is provided for cooking and heating equipment in residential communities; the solar heat collection device is utilized to realize full use of renewable clean energy; heat energy supplement of regional energy supply is achieved through coupling of biogas and solar energy, the current energy shortage problem is solved, energy is fully utilized, and meanwhile the energy supply and heat supply cost of residential communities is reduced. 本发明涉及厌氧消化技术和区域供能领域，具体为一种基于沼气-光热耦合的区域供能