Biomass high temperature combustion boiler

Abstract

The invention is high-efficiency and low-pollution biomass high-temperature combustion boiler and belongs to the boiler technical field. The invention comprises a biomass granule feeding device, a fuel even distribution plate, a cross flue tube, a radiate diversion block, an air nozzle in sections, a cyclone dust collector, a liquid drainage pool, a furnace, and a heat convection chamber. The invention is characterized in that a hopper of the biomass granule feeding device is arranged above the boiler for pre-drying; radiate diversion blocks are arranged in good order in the boiler; the pre-heated high-temperature is injected upwards into a hearth from the nozzle sections in a tangential direction to realize the staged and swirl combustion; the bottom is equipped with a gas, liquid and solid phase high-temperature cyclone segregator; the central high-temperature flue gas flows through a central flue tube to the upper cross flue tube and then enters the annular clearance between the furnace and the boiler wall and the hot convection chamber from below the boiler wall. The invention combines characteristics of biomass fuel and comprehensively absorbs the advantages of high-temperature air combustion, staged combustion, cyclone combustion, cyclone dust collection, liquid drainage, flue gas recirculation and other technologies, so the invention can realize the clean and high-efficiency use of the renewable energy of 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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