High-concentration pulverized coal mixed injection device

The utility model relates to a high-concentration pulverized coal mixed injection device, and belongs to the technical field of pulverized coal combustion of an industrial boiler. According to the high-concentration pulverized coal mixed injection device, a Roots blower is used for conveying pulverized coal, and the pulverized coal and primary air are made to be thoroughly mixed. According to the technical scheme, a pulverized coal conveying pipe connected with a coal bunker is arranged in a primary air pipe, and the Roots blower is arranged on the pulverized coal conveying pipe. The high-concentration pulverized coal mixed injection device is simple in structure, convenient to use and capable of being widely applied to the industrial boiler.