APPARATUS FOR PREVENTING COAL FROM FLOWING INTO A PRIMARY AIR DUCT IN BOWL PULVERIZER

摘要

PURPOSE: A device for preventing the inflow of pulverized coal for an air duct in a bowl pulverizer is provided to prevent damage and spontaneous combustion by pulverized coal by preventing the inflow of pulverized coal to an air duct. CONSTITUTION: A device for preventing the inflow of pulverized coal for an air duct in a bowl pulverizer comprises a plate type frame, a plurality of vertical vanes(102), and horizontal vanes. The frame is located on the outer circumference of an under bowl(200). The vertical vane is surrounded with the frame. The vertical vane inclines toward the air swirling direction of the under bowl by using the rotation of a scraper and bowl. The vertical vane guides the transported air to the under bowl. The horizontal vanes cross with the vertical vane. The horizontal vanes incline toward the floor side of the under bowl. The transported air flows into the under bowl through vertical and horizontal vanes.