Grey hydrogen and green hydrogen coupled ammonia production system

The invention relates to a grey hydrogen and green hydrogen coupled ammonia production system, and belongs to the technical field of green energy utilization, the grey hydrogen and green hydrogen coupled ammonia production system comprises an electrolytic hydrogen production unit adopting green electricity, a green hydrogen outlet of the electrolytic hydrogen production unit is connected with a green hydrogen inlet of a synthetic ammonia raw material mixing unit through a pipeline, and the synthetic ammonia raw material mixing unit is further connected with a grey hydrogen pipeline and a nitrogen pipeline. A nitrogen-hydrogen outlet of the synthesis ammonia raw material mixing unit is sequentially connected with the gas compression unit and the ammonia synthesis unit through pipelines, a hydrogen-nitrogen online analyzer is arranged on a connecting pipeline of the synthesis ammonia raw material mixing unit and the gas compression unit, and an ammonia outlet of the ammonia synthesis unit is connected with the