Ammonium polyvanadate continuous reaction crystallization process

The invention relates to an ammonium polyvanadate continuous reaction crystallization process. The method comprises the following steps: pre-adjusting the acid of the vanadium liquid obtained in the previous process to form slightly acid vanadium liquid, adding a proper amount of ammonium sulfate solid into the vanadium liquid, and heating to uniformly mix and completely dissolve the ammonium sulfate solid. And when the mixed solution reaches a specified temperature, adding a seed crystal, adjusting the pH value of the solution to enable the solution to be in an acidic environment, carrying out a reaction crystallization vanadium precipitation process, and filtering, washing and drying after vanadium precipitation is completed, so that the obtained ammonium polyvanadate crystal has high quality and uniform granularity. The existing intermittent reaction crystallization process product has uncertainty and small and non-uniform crystal granularity, the process realizes continuous vanadium precipitation producti