Waste gas denitration device and power station boiler system

The invention relates to a waste gas denitration device and a power station boiler system.The waste gas denitration device comprises a gas inlet pipe, a connecting pipe, a gas outlet pipe, a denitration piece and a gas homogenizing structure, the gas inlet pipe extends in the first direction and is used for being communicated with waste gas, and the gas outlet pipe extends in the second direction and is communicated with the gas inlet pipe through the connecting pipe; the denitration piece is arranged in the gas outlet pipe and used for removing nitrate in waste gas, the gas homogenizing structure is arranged in the gas outlet pipe and located on the gas inlet side of the denitration piece, and the gas homogenizing structure can be used for enabling the waste gas to uniformly flow to the denitration piece in the radial direction of the gas outlet pipe; wherein the first direction is perpendicular to the second direction. The problem that the flow field of waste gas is not uniform when the waste gas passes thr