Chemical production tail gas absorption tank easy to replace

The utility model discloses a chemical production tail gas absorption tank easy to replace, which comprises an auxiliary tank, a sealing assembly and a gas inlet assembly, four support legs for supporting the auxiliary tank are arranged at the tail part of the auxiliary tank in an array manner, two sides of the head part of the auxiliary tank are respectively connected with an exhaust pipe and a liquid inlet pipe, and the bottom of the auxiliary tank is connected with a discharge pipe; the sealing assembly is arranged at the top of the auxiliary tank, is used for reducing gas leakage and facilitating cleaning and maintenance of the auxiliary tank by a user, and comprises a sealing cover and an annular plate, and the annular plate is fixedly connected with the top of the auxiliary tank; through the arrangement of the sealing assembly and the gas inlet assembly, gas which is not completely absorbed can be automatically absorbed, gas can be shunted through the arrangement of the second gas inlet pipe and the fir