Longitudinal combustion type low-nitrogen combustor and combustion method thereof

The longitudinal combustion type low-nitrogen combustor comprises a mounting plate, intelligent control equipment is fixedly mounted on the side face of the mounting plate, a fan is fixedly mounted on the side face of the mounting plate and located on one side of the intelligent control equipment, and the intelligent control equipment is electrically connected with the fan. An air conveying assembly is arranged on the side face of the mounting plate, a gas conveying mechanism is arranged in the air conveying assembly, and the gas conveying mechanism comprises a fuel gas conveying assembly and a center gas conveying assembly. Air is conveyed into an air conveying pipe through a draught fan, air can be continuously provided, natural gas is conveyed to a center hollow block through a gas conveying pipe, and the natural gas is sprayed out through a second gas conveying hole; the auxiliary combustion area is formed by spraying of second fuel gas conveying holes; and the main combustion area is formed by spraying o