The utility model belongs to the technical field of boilers, and particularly relates to an energy-saving dedusting
sodium sulfide waste heat furnace with a horizontal
economizer, which comprises a furnace body, a boiler
barrel and an ash bucket. A
settling chamber and a
flue group are arranged in the furnace body; the
settling chamber is positioned on the inner side of the
smoke inlet of the furnace body, and the
flue group is communicated with the
settling chamber; the boiler
barrel is arranged at the outer top of the boiler body; the
flue group comprises a communicating flue and an
economizer; the communicating flue is communicated with the
settling chamber; the
coal economizer is horizontally arranged, and a coiled
pipe of the
coal economizer is mounted in a suspended manner, so that the coiled
pipe is in a vertical state; and an ash hopper is arranged at the bottom of the economizer. According to the scheme, the
coal economizer is horizontally arranged, so that the coiled
pipe in the coal economizer is arranged in a vertical state, the separated
soot can vertically fall into the ash hopper by virtue of the gravity of the
soot, the problem of ash deposition of the coal economizer with a vertical structure is effectively solved, and the vertical cooling water tank arranged behind the coal economizer further reduces the temperature of
flue gas; and the dust remover is protected from overheating damage.