The invention provides a gas and
powder fuel dual-purpose boiler which is provided with a front O type horizontal
hearth and a rear vertical
hearth and capable of reducing
fouling of heating surface,solving the coking problem in the
hearth and increasing burn-
off rate of fuel. The gas and
powder fuel dual-purpose boiler comprises a boiler body, wherein the boiler body comprises a boiler drum, a steam-water
system, a burner, a hearth and a
flue, a feed port, a dust falling port, a
burnout tuyere and an
exhaust gas outlet are formed in the boiler body, the front horizontal hearth with a burningzone and the rear vertical hearth with a
burnout zone are arranged in the hearth, the right end of the front horizontal hearth communicates with the lower end of the rear vertical hearth, the burnouttuyere is formed in the furnace wall of the rear vertical hearth and communicates with the hearth, the boiler drum is arranged above the rear vertical hearth, the feed port is located on the left side of the front horizontal hearth, the burner is obliquely arranged in the feed port, the dust falling port is formed at the lower end part of the boiler body, the boiler body is provided with a gas locking device, the
flue is vertically arranged on the right side of the boiler body, the gas inlet end of the
flue communicates with the rear vertical hearth, and the
exhaust gas outlet is formed at the gas outlet end of the flue.