Double-ring rotational-flow type natural gas combustor

The utility model relates to a natural gas burner of a double-ring rotational-flow type. Two air inlet pipes are respectively communicated with a center casing pipe and an annular gas chamber, and an outer ring at the tail end of the casing pipe and an inner ring of the gas chamber are provided with tens of small holes with different sizes. An air regulator is arranged between the annular gas chamber and an air chamber, and an air regulating barrel which can be axially moved is arranged between the air regulator and the center casing pipe. The air chamber is additionally provided with an axial circulating-flow cooling outlet which is led to a jet burner, and a flame monitoring element and an igniting burner are together arranged in the center casing pipe. The utility model has the advantages that the load regulating range is enlarged, the natural gas burner has good burning state and adjustability by that the inner ring and the outer ring simultaneously supply gas which can be uniformly distributed in the rotary air, and the success ratio and the reliability of ignition are enhanced.