Combustion burner and boiler including the same

A combustion burner comprising:

• a fuel nozzle that injects fuel gas prepared by mixing fuel and primary air;
• a coal secondary air nozzle arranged on an outer side of the fuel nozzle that injects coal secondary air from an outer periphery of the fuel nozzle;
• a plurality of flame holders that are arranged in an opening of the fuel nozzle,
• wherein each flame holder has a splitting shape that widens in the flow direction of the fuel gas when seen in a cross section along the axial direction of the fuel nozzle,
• wherein the fuel nozzle and the coal secondary air nozzle are respectively configured to inject the fuel gas and the coal secondary air without swirling, and
• wherein the flame holders are arranged to extend through each other at at least one intersection which is placed in a central area of the opening of the fuel nozzle.