A constant density biomass gasifier

Abstract

The invention provides a constant density biomass gasification furnace, which includes a furnace body, a movable furnace cover and a self-rotating nozzle, and a pressing mechanism is arranged on the movable furnace cover, wherein the pressing mechanism includes a driving device and a pressing plate, The pressing plate is used to provide downward constant pressure to the biomass fuel in the furnace body under the drive of the driving device; it can be seen that the present invention provides a constant pressure to the furnace through the pressing mechanism arranged on the movable furnace cover. A continuous top-down pressure or intermittent impact on the biomass fuel in the storage area makes the fuel layer drop steadily and improves the compactness of the material layer, eliminating the bridging phenomenon of the material layer; at the same time, the present invention The self-rotating nozzle allows the gasification agent to enter the reaction zone evenly from the central direction, so that the oxidation layer and the reduction layer are stable and balanced, and the burn-through phenomenon is eliminated; It is easy to realize automatic control, which greatly reduces the operating cost and has better economic applicability.

Description

technical field [0001] The invention belongs to the technical field of biomass gasification furnaces, in particular to a constant density biomass gasification furnace. Background technique [0002] As we all know, biomass is a sustainable green resource, and it is a reliable resource acquisition channel for my country's energy structure transformation, air pollution control, and CO2 emission reduction. However, due to scattered biomass resources, low bulk density, and difficulties in collection and transportation, most of the biomass has not been properly used. At present, in our country, agriculture randomly burns or discards straw, excessive and inefficient use of chemical fertilizers, all of which have caused serious environmental pollution and consumed a lot of energy of local governments. To completely solve the above problems, there is an urgent need for a large-scale high-value biomass treatment technology-biomass gasification technology. [0003] Biomass gasificati...

AI Technical Summary

Problems solved by technology

However, in the actual operation of the existing downdraft gasifier type, the biomass material layer does not have an appropriate downward driving force, and the air distribution port of the gasification agent is directional, which may easily cause irregular shapes of the oxide layer and the reduction layer of the furnace body section. , the material layer moves down inconsistently

In addition, the fuel accumulation is bound by the accumulation angle, which makes the fuel in the furnace prone to bridging and burning through, which affects the efficiency of the thermochemical reaction in the furnace, and it is easy to cause local overheating (flying temperature) of the bed layer, so the existing gasifier type is suitable The fuel is limited to those with high bulk density, small particle size, and small stacking angle, which severely limits the selection of raw materials and increases the operating cost of biomass gasification

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