Comprehensive treatment method for boiler flue gas and pressure washing wastewater in viscose fiber industry

The invention belongs to the technical field of environmental protection and energy conservation, and relates to a comprehensive treatment method for boiler flue gas and pressure washing wastewater in the viscose fiber industry, which comprises the following steps: 1) adjusting the pH value of the pressure washing wastewater to 6-9, and carrying out precipitation and filtration treatment to obtain pretreated pressure washing wastewater; (2) carrying out denitration treatment on the boiler flue gas by adopting ammonia water, and collecting the denitrated flue gas; adjusting the pH value of the pretreated pressure washing wastewater to 10-11, washing the denitrated flue gas, emptying the washed flue gas, and collecting washing waste liquid; and 3) adjusting the pH value of the washing waste liquid obtained in the step S2 to 11-12, carrying out precipitation and filtration treatment, removing suspended solids in the waste liquid, carrying out negative pressure steam stripping deamination treatment on the washing