Powdered coal gasifying device capable of measuring feeding quantity and calibrating solid mass flowmeter on line

The utility model provides a powdered coal gasifying device capable of measuring feeding quantity and calibrating solid mass flowmeter on line. The powdered coal gasifying device comprises a dry-method feeding and measuring device, a solid mass flowmeter calibrating device and a powdered coal gasifying furnace, wherein the dry-method feeding and measuring device comprises a normal-pressure storage bin, a weighing and measuring tank, an intermittent feeding device and a material distributing tank that are connected sequentially. An inlet of a three-way valve is connected with an outlet of the dry-method feeding and measuring device; a first outlet of the three-way valve is connected with the pipeline inlet of the solid mass flowmeter calibrating device; a second outlet of the three-way valve is connected with the powdered coal gasifying furnace; and a solid mass flowmeter is arranged on a conveying pipeline. The three-way valve is connected with the powdered coal gasifying furnace to form a material supply pas