Process of recovering ammonia from ammonia-nitrogen wastewater and exhaust gas of tungsten metallurgy

The invention relates to a process of recovering ammonia from ammonia-nitrogen wastewater and exhaust gas of tungsten metallurgy. The process is characterized by comprising the following steps: introducing ammonium paratungstate crystal steam and ammonia tail gas into a rectifying tower by virtue of an induced draft fan, maintaining the temperature in a range of 90-95 DEG C and condensing and recovering ammonia by using a steam separator; pumping kettle raffinate and ammonia-nitrogen wastewater which are generated after rectifying the ammonia-nitrogen wastewater into a stirring tank, adding sodium hydroxide for ammonia activation, and adjusting the pH value to 10-11; after ammonia activation, pumping to an air stripping tower, and meanwhile, introducing ammonia wastewater generated by ammonia activation into the air stripping tower, adding sodium hydroxide to adjust the pH value to 10-11.5, and controlling the temperature at 45-90 DEG C and carrying out air stripping for 2 hours; feeding ammonia gas generated in the air-stripping process and ammonia gas which is not condensed by the steam separator into a hydrochloric acid spray tower for circular adsorption to generate ammonium chloride and returning to the main process to prepare an analytical solution. The process provided by the invention is simple in process flow, stable in treatment effect, less in equipment investment, free from secondary pollution and low in treatment cost.