COAL-FIRED AND NATURAL-GAS DUAL-PURPOSE BOILER SYSTEM AND USE METHOD THEREFOR

Abstract

The present invention belongs to the technical field of boilers, and in particular relates to a coal-fired and natural-gas dual-purpose boiler system and a use method therefor. The technical solution is: a coal-fired and natural-gas dual-purpose boiler system, comprising a boiler main body, the bottom of the boiler main body being connected to a slag remover, an upper portion of the boiler main body being connected to a tail flue, a plurality of natural-gas burners and pulverised-coal burners being arranged on the boiler main body; further comprising a natural-gas pipeline communicating with the plurality of natural-gas burners and a pulverised-coal pipeline communicating with the plurality of pulverised-coal burners, and a coal mill being connected to the pulverised coal pipeline; and further comprising a primary air duct connected to the coal mill, a secondary air duct communicating with the plurality of natural-gas burners and the plurality of pulverised coal burners, and a bypass air duct connected between the primary air duct and the secondary air duct. The present invention provides a coal-fired and natural-gas dual-purpose boiler system capable of independently taking coal or natural gas as fuel and a use method for the coal-fired and natural-gas dual-purpose boiler system.

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