Iron phosphate filtering and impurity removing system

The utility model relates to an iron phosphate filtration and impurity removal system, which comprises a primary washing filtration unit and a secondary washing filtration unit, the primary washing filtration unit comprises a primary washing filter press, the primary washing filter press is connected with a primary washing raw material inlet pipeline and a primary washing mother liquor discharge pipeline, and is also connected with at least one group of primary washing water inlet pipelines and corresponding primary washing liquid outlet pipelines; when multiple groups of primary washing water inlet pipelines are arranged, the primary washing water inlet pipelines are sequentially arranged according to the advancing direction of primary washing raw materials; the secondary washing filter unit comprises a secondary washing filter press, the secondary washing filter press is connected with a secondary washing slurry inlet pipeline and a secondary washing mother liquor outlet pipeline, and is also connected with