Bridge opening type combustion reheating ultra-low nitrogen steam generator

Abstract

The utility model discloses a bridge opening type combustion reheating ultra-low nitrogen steam generator which comprises a first outer frame, a second outer frame, a third outer frame and a fourth outer frame which are sequentially arranged from left to right, a combustor for generating high-temperature smoke is fixedly installed on the upper end face of the first outer frame, and the exhaust portion of the combustor is communicated with the interior of the first outer frame. A coil pipe type direct-flow hearth and a plurality of communicated convection banks are fixedly installed in the first outer frame, the convection banks are of a vertical tubular structure, a first reheat steam pipe and a steam pocket tank are fixedly installed in the second outer frame, and a plurality of second reheat steam pipes are connected to the lower portion of the steam pocket tank. A plurality of vertical tubular reheat steam pipes III are fixedly mounted in the outer frame III; and a plurality of condenser pipes which are communicated with one another are fixedly arranged in the outer frame IV. In the process of producing saturated steam, purified water is subjected to multiple times of heating treatment, high-temperature flue gas generated by the combustor can be efficiently utilized, heat loss is reduced, and the heat energy conversion efficiency is improved.

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