Biomass high temperature combustion boiler

Abstract

The invention relates to a high-efficiency and low-pollution biomass high-temperature combustion boiler, which belongs to the technical field of boilers. The invention includes a biomass particle feeder, a fuel uniform distribution plate, a cross smoke pipe, a radiation guide block, a sectional air nozzle, a cyclone dust collector, a liquid slag discharge pool, a furnace, and a steam generating chamber. The feature is that the hopper of the biomass particle feeder is set above the boiler, which can realize pre-drying; the furnace is built with well-arranged radiation guide blocks; the preheated high-temperature air enters the furnace chamber tangentially and vertically from the nozzle to realize grading , swirling combustion; the bottom is equipped with a gas-liquid-solid three-phase high-temperature cyclone separator, and the high-temperature flue gas in the center flows through the central flue pipe to the upper cross flue pipe and enters the annular gap between the furnace and the furnace wall, and enters the steam generation chamber from the bottom of the furnace wall . The invention combines the characteristics of biomass fuel and comprehensively absorbs the advantages of high-temperature air combustion, graded combustion, cyclone combustion, cyclone dust removal, liquid slag removal and flue gas recirculation, and can realize clean and efficient utilization of renewable energy biomass.

Description

Technical field: [0001] The invention belongs to the technical field of boilers, and in particular relates to a biomass briquette fuel boiler. Background technique: [0002] Biomass energy has always been an important energy source for human survival, and occupies an important position in the entire energy system. It ranks fourth in the world's total energy consumption after coal, oil and natural gas. Biomass fuel mainly includes the following aspects: ① crop straw and agricultural processing residues; ② forest and forestry processing residues; ③ human and animal manure, industrial organic waste and aquatic plants; ④ urban domestic sewage and garbage. At present, there are three technologies for the utilization of biomass energy: biomass gasification, liquefaction, and direct combustion, all of which have certain problems. Gasification and liquefaction technology burn biomass after multiple conversions and purifications. The intermediate links not only increase the investme...

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Problems solved by technology

"China Energy" (2004, 26(9): page 39-42) pointed out that due to the low combustion temperature of the current direct combustion method, the ash accumulation and slagging caused by low melting point fly ash, as well as the combustion process will produce A series of problems such as particle emissions that have an impact on human health limit this extensive application

In addition, due to the high water content of biomass, much of the heat generated by combustion is wasted on the evaporation of water, which makes the utilization rate of biomass combustion heat in current fixed-bed and fluidized-bed boilers low.

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