Flue gas purification and high-nitrate low-calcium type brine purification system

The invention relates to the technical field of brine purification systems, in particular to a flue gas purification and high-nitrate low-calcium type brine purification system. Comprising a boiler, a desulfurization and dust removal system, a water circulation compressor, a fine desulfurization device, a brine purification system, an ultrafiltration membrane device, a salty mud descending assisting device, a dechlorination device, a salty mud emulsifying device, a salty mud defoaming device and a desulfurization gypsum purification system. An effective brine purification process, a solid waste, gas waste and liquid waste treatment and utilization process and a wet desulfurization and fine desulfurization flue gas purification process are carried out according to the characteristic change of the original brine, the corrosion of salt smoke and acid mist to equipment can be reduced, the service life of the equipment is prolonged, the maintenance and protection cost is reduced, and the energy consumption is redu