Biomass molding fuel gasification combustion boiler with mechanical travelling grate

Abstract

The invention relates to a mechanism movable grate biomass molded fuel gasification burning boiler. The boiler comprises a grate base, a grate and a primary air chamber. Two sides of the upper part of the grate base are provided with convective heat exchange tube bundles. A boiler barrel is arranged in the middle of the upper part of the boiler and the convective heat exchange tube bundles are arranged at the two sides of the boiler barrel. A fuel hopper arranged in the front part of the grate is provided with a fuel distributor which divides the lower part of the fuel hopper into a front fuel feeding channel and a rear fuel feeding channel, and a precombustion chamber is arranged between the front fuel feeding channel and the rear fuel feeding channel. The upper part of the grate is provided with a downward convex front arch and a curved rear arch, and the outlet of the downward convex front arch is positioned on the rear part of a lower boiler furnace. The curved rear arch is higher than the downward convex front arch. Walls on the two sides of the lower boiler furnace are provided with a row of secondary air blast pipes which are communicated with a secondary air duct. The boiler is suitable for burning biomass molded fuel, low in operation cost, high in thermal efficiency, low in exhaust dust concentration, and favorable for conservation and environmental protection.

Description

technical field [0001] The invention relates to the field of boilers, in particular to a mechanically movable fire grate biomass molding fuel gasification combustion boiler. Background technique [0002] Biomass briquettes usually refer to agricultural and forestry wastes, such as sawdust, bark, rice husk, straw, peanut shells and bagasse, etc. The original loose and amorphous raw materials are mechanically compressed into a certain shape and high density. Solid briquettes. Due to the low sulfur, low nitrogen, low ash and renewable characteristics of biomass briquette fuel, the use of biomass briquette fuel will greatly reduce the emission of sulfur dioxide, nitrogen oxides and dust. [0003] Biomass briquette fuel has the following combustion characteristics: (1) Since biomass briquette fuel is a granular fuel with a relatively dense structure and organization after mechanical high-pressure molding, its moisture content is relatively high, so at the initial stage of combus...

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Problems solved by technology

[0005] In view of the problems that existing coal-fired boilers and their combustion equipment cannot adapt to the combustion characteristics of biomass briquettes, resulting in insufficient boiler output, low thermal efficiency, and easy generation of black smoke or yellow smoke, etc., the present invention provides a biomass briquette fuel suitable for burning Mechanical moving grate biomass briquette fuel gasification combustion boiler

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