Gas and powder fuel dual-purpose boiler provided with front O type horizontal hearth and rear vertical hearth

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of boiler structures, in particular to a gas and powder fuel dual-purpose boiler with an O-shaped horizontal furnace at the front and a vertical furnace at the rear. Background technique [0002] Small and medium-sized industrial pulverized coal boilers are one of the most important coal-consuming equipment in my country except power plant boilers. Compared with chain furnaces, industrial pulverized coal boilers adopt a chamber combustion method. The ground coal particles are carried by the air into the furnace for combustion. It has high boiler thermal efficiency; however, the existing industrial pulverized coal boiler combustion devices and technologies are still not perfect, and there are problems such as easy coking in the furnace and high content of fly ash combustibles. Contents of the invention [0003] Therefore, in view of the above-mentioned problems, the present invention proposes a gas and powde...

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Problems solved by technology

[0002] Small and medium-sized industrial pulverized coal boilers are one of the most important coal-consuming equipment in my country except power plant boilers. Compared with chain furnaces, industrial pulverized coal boilers adopt a chamber combustion method. The ground coal particles are carried by the air into the furnace for combustion. It has high boiler thermal efficiency; however, the existing industrial pulverized coal boiler combustion devices and technologies are still not perfect, and there are problems such as easy coking in the furnace and high content of fly ash combustibles

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