Titanium dioxide hydrolysis waste acid recycling treatment process

The invention provides a titanium dioxide hydrolysis waste acid recycling treatment process. The process comprises the following steps: (1) collecting generated wastewater, freezing for crystallizing,carrying out heat exchange, and then carrying out pretreatment; (2) enabling pretreated produced water to enter a first-section nanofiltration unit; (3) enabling the concentrated solution of the first-section nanofiltration unit to enter a second-section nanofiltration unit, returning the water produced by the second-section nanofiltration unit to the first-section nanofiltration unit for water feeding; (4) enabling water produced by the first-section nanofiltration unit to enter an evaporation unit, performing evaporative concentration, and enabling condensed water of the evaporation unit toenter a reverse osmosis unit; and (5) enabling concentrated water of the second-section nanofiltration unit to enter a resin adsorption unit, enabling effluent of the resin adsorption unit to enter aheat exchange unit, enabli