Natural gas hydrogen-doped mixing device

The invention relates to a natural gas hydrogen-doped mixing device which comprises an inlet section, a gradually-shrunk transition section, an outlet section, a first gas inlet flow channel and a second gas inlet flow channel. The natural gas hydrogen-doped mixing device has the beneficial effects that no flow channel exists in the natural gas hydrogen-doped mixing device, the structure is greatly simplified, and the flow channel manufacturing difficulty is reduced; the overall structure is similar to a frustum, and slow transition of the flow channel size is achieved; the direction of a mixed gas outlet of the device is the same as that of a rotating shaft of the whole structure, and a flow baffle perpendicular to the rotating shaft direction is not arranged, so that pressure drop loss can be reduced; the device is not provided with an internal flow guide body, and has a more sufficient mixing space compared with the scheme of arranging the flow guide body; according to the device, the whole mixing device i