Single-burner-port-corresponding multi-pipe-combined intermediate storage bunker type hot air powder-supplying system

The invention discloses an intermediate storage bunker type hot air powder-supplying system and belongs to the technical field of burning equipment. The problem that the coal powder air flow speed andthe powder supplying air flow concentration in coal powder pipelines under the low load cannot be coordinately controlled is solved, meanwhile the coal powder air flow air supplying quantity of a main burning area under the low load is decreased, and generation of NOX is advantageously reduced. A single powder supplying pipeline corresponding to a single burner port is transformed into the multiple parallel powder supplying pipelines. When the load is decreased (or increased), the powder supplying pipeline circulating area is adjusted by closing (or opening) valves for controlling all the independent powder supplying pipelines one by one, so that while the optimum coal powder concentration of a coal powder air flow is maintained, it is ensured that the flow speed of the coal powder air flow is in a reasonable ran