Desulfurization catalytic device convenient to replace

The utility model relates to the technical field of desulfurization catalysis processes, in particular to a desulfurization catalysis device convenient to replace. Comprising a gas inlet pipe and an exhaust pipe, a conveniently-replaced desulfurization catalytic device is arranged between the gas inlet pipe and the exhaust pipe and comprises a shell fixedly connected with the gas inlet pipe and the exhaust pipe, a through hole is formed in the shell and communicated with the gas inlet pipe and the exhaust pipe, a first spring is arranged on the inner bottom face of the through hole, and a second spring is arranged on the inner bottom face of the first spring. A first spring is arranged in the shell, a buffer plate is arranged on the first spring, a first groove is symmetrically formed in the position, located above the buffer plate, in the shell, a second spring is arranged in the first groove, a plug pin is arranged on the second spring, a connecting rod is arranged on the side, close to the second spring, o