Biomass boiler

Abstract

The invention relates to a biomass boiler. The biomass boiler comprises a hearth, boiler barrels, a water cooling system, a combustion system, a coal economizer and air preheaters. The boiler barrels are arranged above the hearth and comprise the upper boiler barrel and the lower boiler barrel, the upper boiler barrel is connected with a water conveying pipe, and the lower end of a connecting pipe of the lower boiler barrel is connected with a lower header. The water cooling system comprises water cooling walls which are arranged on the two sides of the inside of the hearth and a water cooling screen which is connected to the upper portion of the inside of the hearth. The combustion system is provided with a scale-type chain grate, a feeding machine is arranged at a hearth opening in the front end of the scale-type chain grate, and air chambers, an ash discharging opening and a slag removal opening are formed below the scale-type chain grate. An ash bucket is arranged over the slag removal opening, a furnace top smoke tube arranged on the top of the hearth is connected with the coal economizer, the coal economizer is supported in a ventilating duct, and the air preheaters are connected beneath the coal economizer. A boiler smoke outlet is formed in the side portion of the tail end of the ventilating duct. The biomass boiler is low in smoke flow speed, capable of not abrading the heating surface, not prone to coking and tempering, stable and reliable to operate, and capable of guaranteeing continuous operation of production.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a biomass boiler. Background technique [0002] At present, the biomass fuel of biomass boilers has high volatile content, is easy to catch fire, and has afterburning phenomenon. The ash melting point is low, the boiler bed temperature is easy to exceed the ash melting point, coking is easy to occur, and the heating surface is easy to wear, causing accidents. Boiler furnace The internal flue gas flow rate is high, and the fine particles and volatile matter are easily brought to the tail to cause flashback, which will burn out the equipment, make the boiler operation unstable, and have a certain impact on continuous production. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned technical problems and provide a boiler with low flue gas flow rate, no wear, no coking, no tempering on the heating surface, stable and reliable opera...

AI Technical Summary

Problems solved by technology

[0002] At present, the biomass fuel of biomass boilers has high volatile content, is easy to catch fire, and has afterburning phenomenon. The ash melting point is low, the boiler bed temperature is easy to exceed the ash melting point, coking is easy to occur, and the heating surface is easy to wear, causing accidents. Boiler furnace The internal flue gas flow rate is high, and the fine particles and volatile matter are easily carried to the tail to cause flashback, which will burn out the equipment, make the boiler operation unstable, and have a certain impact on continuous production.

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