ORC-based long-distance heat supply network system

The invention discloses a long-distance heat supply network system based on ORC. The long-distance heat supply network system comprises a heat supply circulation loop, an ORC power generation circulation loop and a power supply system. A relay pump station is arranged on a return water conveying pipeline of the heat supply circulation loop; the ORC power generation circulation loop is provided with an evaporator, a steam working medium steam inlet pipeline, an ORC generator set, a steam working medium steam exhaust pipeline, a working medium cooler and a liquid working medium conveying pipeline which are sequentially connected, and the evaporator is used for circulating flowing of an organic working medium; the working medium cooler exchanges heat on a return water conveying pipeline of the heat supply circulation loop, and the ORC generator set is used for outputting electric energy to a power supply system so as to supply power to electrical equipment including the relay pump station. Electric energy is gen