Ammonia gas recovery structure and ammonia gas recovery method for fly ash maintenance workshop

The invention provides an ammonia gas recovery structure and an ammonia gas recovery method for a fly ash maintenance workshop. The body health of production personnel in the workshop is guaranteed, corrosion of equipment in the workshop is reduced, ammonia gas can be recycled, and secondary pollution is reduced. An ammonia gas detector is mounted in the fly ash curing workshop; a collecting air pipe mounted in the fly ash maintenance workshop is connected with a washing tower; a first-stage packing section, a first-stage spraying section, a second-stage packing section, a second-stage spraying section and a demisting plate are sequentially arranged in the washing tower from bottom to top; the liquid storage tank is connected with a spraying water pipe through a circulating pump, and the spraying water pipe is connected with the first-stage spraying section and the second-stage spraying section; the desalted water input pipeline is connected with the liquid storage tank; the washing tower is connected with th