Inlet gas treatment device and denitration equipment

The utility model discloses an air inlet treatment device and denitration equipment, and solves the technical problem that a catalyst is easily poisoned and inactivated in the prior art. The gas inlet treatment device comprises a shell, a gas inlet and a gas outlet, wherein the shell is provided with a gas inlet and a gas outlet; the particle intercepting assembly is used for intercepting particles in the flue gas to be denitrified; the particle intercepting assembly comprises a first intercepting mechanism, a second intercepting mechanism and a third intercepting mechanism which are sequentially arranged in the shell in the gas flowing direction. The dust hopper is arranged below the shell, and the particles intercepted by the particle intercepting assembly fall into the dust hopper; wherein the first intercepting mechanism comprises a first baffle plate, and the first baffle plate is vertically placed in a natural state and forms an intercepting surface matched with the section of the shell; under the pushi