Micro oil pulverized coal burner
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The invention provides a micro oil pulverized coal burner, which comprises an elbow joint provided with a pulverized coal inlet and a primary air pipe connected with the elbow joint, wherein the center of the primary air pipe is provided with a micro oil doper and a central cylinder in turn; the outer wall of the micro oil doper is provided with at least one condensation body which can telescopically move; the inner wall of the primary air pipe is provided with at least one guide ring which can telescopically move; the central cylinder is also provided with an air film wind opening; and the structures of the condensation body and the guide ring which can telescopically move are that: the condensation body is connected with an inner pull rod, the guide ring is connected with an outer pull rod, and the inner and the outer rods can be pushed in or pulled out manually or automatically pushed in or pulled out by an actuator. Because the outer wall of the micro oil doper is provided with at least one condensation body which can telescopically move, and the inner wall of the primary air pipe is provided with at least one guide ring which can telescopically move, the internal structure of the burner can be changed according to operating conditions; under the states of micro oil ignition and normal combustion, different concentration distribution requirements of the pulverized coal are met; and the micro oil pulverized coal burner is used for the oil saving ignition start and the low-load stable combustion in pulverized coal fired boilers in large-sized power stations.