Industrial production process for preparing high-purity cyclopentadiene

The invention provides an industrial production process for preparing high-purity cyclopentadiene by depolymerizing dicyclopentadiene. Dicyclopentadiene is used as a raw material; adding the diluent 1and the polymerization inhibitor 1 into dicyclopentadiene and uniformly mixing; then carrying out depolymerization, rectification and separation in a reactive distillation tower 1; collecting crude cyclopentadiene at the top of a tower, then adding the crude cyclopentadiene, a diluent 2 and a polymerization inhibitor 2 into an evaporation kettle, carrying out heating vaporization, feeding steam through a cracking tube, carrying out tubular cracking, carrying out secondary depolymerization distillation separation in a reaction distillation tower 2 after cracking, and collecting high-purity cyclopentadiene at the top of the tower. The process solves the problems of coking, blasting boiling and low purity in the existing process, obtains high-purity cyclopentadiene, has higher yield and hashigher industrial applicat