Large-scale thermal power generating unit front and back wall opposed flow boiler secondary air flow field optimization device

Abstract

This utility model relates to the field of boiler technology, and in particular to a device for optimizing the secondary air flow field of a large thermal power generating unit's front and rear wall-mounted boiler. It includes: a secondary air duct guide plate optimization module, in which several guide plates are installed in the secondary air duct, and the guide plates are connected to the secondary air duct via support rods; a side-wall single burner inner and outer secondary air annular inlet optimization module, in which a first air-gathering ring and a second air-gathering ring are installed inside and outside the burner on each wall side; and a side-wall single burnout air inner and outer secondary air annular inlet optimization module, in which a first air-gathering ring is installed inside and outside the burnout air on the wall side. This utility model, through optimization of the secondary air system flow field, achieves uniform air distribution throughout the boiler, improves the problem of uneven boiler combustion, greatly alleviates the problem of high-temperature corrosion of heating surfaces and frequent boiler tube rupture, and improves the unit's operational safety and economy.

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