Low-nitrogen combustion gas boiler

The low-nitrogen combustion gas boiler comprises a boiler body, an operation box is arranged on the right side of the boiler body, the top of the boiler body is communicated with a connecting pipe, the other end of the connecting pipe extends to the left side of the operation box and is communicated with the operation box, and a motor is arranged at the lower end of an inner cavity of the operation box. The operation box is arranged and used for treating and collecting ash of discharged smoke, resource waste is avoided, the connecting pipe is arranged and used for conveying the smoke discharged by the boiler body into the operation box, the motor is arranged and used for driving the blades to rotate, and the problem that a large amount of smoke is generated during combustion of the boiler, so that waste of resources is caused is solved. In the prior art, flue gas contains a large amount of ash residues, the ash residues can be used for manufacturing building materials such as cement, bricks and concrete aggre