Fluidized bed industrial boiler combusting wood industry waste and combustion heat exchange method of fluidized bed industrial boiler

Abstract

The invention relates to the technical field of boilers, in particular to a fluidized bed industrial boiler for combusting wood industry waste and a combustion heat exchange method of the fluidized bed industrial boiler. The fluidized bed industrial boiler comprises a hearth, an arch part and an uptake flue which communicate with one another in sequence; the hearth communicates with a first material conveying mechanism, and the first material conveying mechanism is used for conveying first-kind biomass particles to a lower area of the hearth; the arch part is provided with a large-size end anda small-size end, the large-size end is connected to the hearth, and the small-size end is connected to the uptake flue; and the arch part communicates with a second material conveying mechanism, andthe second material conveying mechanism is used for conveying second-kind biomass particles to an upper area of the hearth, wherein the particle size of the first-kind biomass particles is millimeterlevel or above, and the particle size of the second-kind biomass particles is micron level. Partitioned stable and sufficient combustion and effective combustion heat utilization of the biomass particles with different particle sizes are achieved.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a fluidized bed industrial boiler burning wood waste and a combustion heat exchange method thereof. Background technique [0002] In the process of wood production and processing, a large amount of wood chips, bark, wood powder and other biomass solid wastes will be produced. This kind of biomass solid waste can be used as fuel for industrial boilers to produce hot water or steam. [0003] However, general fluidized bed industrial boilers have encountered difficulties when dealing with this kind of wood processing waste biomass fuel. The main reason is that this type of biomass often has a wide particle size distribution, including both millimeter-sized and larger-sized biomass, such as wood chips, bark, etc., and micron-sized small-sized biomass, such as wood powder Wait. It is difficult for biomass with different particle sizes to be fluidized stably at the same fluidizati...

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Problems solved by technology

[0007] The embodiment of the present application provides a fluidized bed industrial boiler that burns wood waste and its combustion heat exchange method, which solves the problem of using a fluidized bed industrial boiler in the prior art for wood processing with a wide particle size distribution. When it comes to waste, it is difficult to ensure that biomass with different particle sizes can be burned stably and fully

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