System and method for co-processing biomass energy by using waste heat of cement kiln

The invention discloses a system and a method for co-processing biomass energy by utilizing waste heat of a cement kiln. The energy system comprises a biomass gasification system, a biomass raw material conveying system used for conveying biomass raw materials to the biomass gasification system, a waste heat power generation system connected with the biomass gasification system and a cement kiln decomposing furnace connected with the biomass gasification system. The waste heat power generation system comprises a waste heat boiler and a steam turbine power generation module. According to the energy system, waste heat in the cement kiln and the biomass gasification process can be efficiently recycled, biomass energy such as forestry and agricultural residues is co-processed through the cement kiln, and generated high-calorific-value strong-reducibility fuel gas can be used for cement kiln alternative fuel and a denitration process. The system effectively reduces the energy consumption of the cement kiln system,