The invention discloses a regeneration process and regeneration equipment for heavy
metal containing
nitric acid waste liquor. The regeneration process comprises the following steps of: evaporating
nitric acid by virtue of an evaporative
crystallization device under the action of negative pressure, condensing and recycling the
nitric acid steam to obtain regenerated nitric acid; mixing heavy
metal nitrate, which is recycled by a discharging
system of the evaporative
crystallization device, with concentrated
sulfuric acid, stirring the mixture, cooling the mixture to
room temperature, and filtering the mixture to obtain a heavy
metal sulphate product in suction. The regeneration equipment comprises an evaporating device, a condensing and cooling device, a cooling and crystallizing device, a suction-filtering device and a horizontal ejection vacuum device, wherein the evaporating device, the condensing and cooling device and the cooling and crystallizing device are communicated in sequence. The regeneration process is high in nitric acid
recovery rate, almost free of secondary
pollution, capable of recycling the heavy metal to the greatest extend and high in market value of the recycled product. And the complete equipment is easy to manufacture, install, maintain and repair, low in
energy consumption, and high in economical benefits and environment-friendly benefits.