Biomass boiler system with self biomass upgrading function

Abstract

The invention discloses a biomass boiler system with a self biomass upgrading function. The biomass boiler system comprises a biomass charcoal preparation unit, a boiler, an air preheater, a dust remover, a system induced draft fan and a desulfurizing and smoke exhausting device, wherein the air preheater, the dust remover, the system induced draft fan and the desulfurizing and smoke exhausting device are sequentially connected to a boiler smoke exhausting opening; the biomass charcoal preparation unit comprises a raw material cabin, a breaking machine, a granulating machine and a carbonizingfurnace; the raw material cabin, the breaking machine and the granulating machine are sequentially connected, and the upper part of the carbonizing furnace is connected with an outlet of the granulating machine; the raw material cabin is used for storing a biomass raw material; combustible smoke exhausted out by the upper part of the carbonizing furnace can be inflated into the boiler to be combusted through an air opening at the upper part of a throat, and biomass charcoal prepared by the carbonizing furnace can be exhausted from the bottom to be supplied to the boiler to be combusted througha feeding opening; an upgrading induced draft fan is arranged behind the dust remover to lead low-temperature smoke out to be sent into a smoke mixer to be mixed with high-temperature smoke led out from the boiler to be sent into the smoke mixer; 200 to 450 DEG C mixed smoke obtained in the smoke mixer can be sent into the bottom of the carbonizing furnace to be used for providing heat and low-oxygen environment in a biomass carbonizing process.

Description

technical field [0001] The invention relates to the field of biomass charcoal preparation, in particular to a biomass boiler system with a built-in biomass upgrading function. Background technique [0002] The amount of agricultural waste biomass in my country is huge, and the biomass is widely distributed. If it is not utilized, it will not only waste resources but also bring a huge load to the environment. At present, the research on the efficient resource utilization of biomass mainly focuses on biomass gasification and liquefaction, and there are few studies on the preparation of biomass charcoal fuel by carbonization of biomass, and the existing carbonization technology mostly adopts batch process at medium temperature (450 ℃ ~ 700 ℃ ℃) and high temperature (greater than 700 ℃), the process is complicated, the production cost is high, and most of them are limited to laboratory research. The Chinese government has always listed the research and application of biomass en...

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Problems solved by technology

[0004] (1) Original ecological biomass has high water content and low calorific value, is not easy to store, and is not suitable for district heating in households and small villages and towns; original ecological biomass cannot be completely burned when directly burned, which not only wastes resources, but also produces a large amount of waste smoke

[0005] (2) Most of the current biomass carbonization technologies are to carbonize biomass at a temperature above 450°C, the carbonization temperature is high, and the production energy consumption is large

[0006] (3) The preparation equipment of biochar is relatively complicated and independent of the boiler system, and the cost of separate construction is high, and if the coal-fired boiler needs to be mixed with biomass, only the finished biomass fuel can be purchased, which is high in cost, which is not conducive to the mixed combustion of coal-fired boilers transformation of biomass

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