Outlet flue gas sampling device for denitration reactor

The utility model relates to the technical field of denitration reactors, in particular to an outlet flue gas sampling device for a denitration reactor, which comprises at least three measuring cylinder groups arranged at intervals along the flowing direction of flue gas, and each measuring cylinder group comprises at least four measuring cylinders arranged at intervals; each measuring cylinder is connected with a sampling branch pipe, and each sampling branch pipe is provided with a first electromagnetic valve; all the sampling branch pipes are gathered to a sampling main pipe, and the sampling main pipe conveys flue gas to be detected to an analyzer; according to the utility model, the measuring cylinders are arranged on different sections of the outlet flue gas pipeline and different positions of the same section, so that the problem of inaccurate measurement data caused by non-uniform flue gas distribution in the outlet flue gas pipeline is avoided; besides, the on-off of the sampling branch pipe is reali