Shell-and-tube axial tubular reactor for maleic anhydride production

The utility model discloses a shell-and-tube axial tubular reactor for maleic anhydride production. The heat exchanger comprises a lower seal head, an upper seal head, a barrel, an upper tube plate, alower tube plate, a baffle plate and a plurality of tube nest assemblies, the upper tube plate and the lower tube plate have the same structure; each tube plate comprises a vertically-arranged supporting cylinder and a horizontally-arranged tube plate body, an inner reinforcing cylinder is arranged on the inner side of the supporting cylinder; the inner reinforcing cylinder is fixedly connected with the supporting cylinder through a plurality of locking mechanisms; the outer side of the supporting cylinder is sequentially sleeved with a sealing cylinder and a fixing sleeve. The tube nest assembly comprises a tube nest body, a guide rod, a knife-shaped gate valve and a plurality of spoilers, the guide rod is vertically arranged in the tube nest body, a conical cap supporting strip at the upper end of the guide rod