Comprehensive treatment process for alkali residue waste liquid produced by ammonia-alkali process

The comprehensive treatment process comprises the following steps: (1) enabling the alkaline residue waste liquid discharged from an ammonia still to enter a tank body of a cooling conversion reaction tank through an alkaline residue waste liquid feeding pipe, and conveying CO2 and NH3 generated in a sodium bicarbonate calcination and mother liquor ammonia distillation preheating section through a mixed gas pipe, the mixed gas enters a tank body of a cooling conversion reaction tank through mixed gas nozzles which are arranged at intervals, and CaCl2 in the alkaline residue waste liquid is completely converted into CaCO3 to be settled out; and (2) the converted alkaline residue waste liquid is discharged through an alkaline residue waste liquid discharging pipe and sequentially enters a first horizontal spiral centrifugal machine, a second horizontal spiral centrifugal machine, a third horizontal spiral centrifugal machine and a fourth horizontal spiral centrifugal machine to be washed, and the washed clear l