Efficient apparatus for condensing, collecting and separating biomass pyrolytic vapor

Abstract

The invention relates to the technical field of utilization of renewable energy, in particular to an efficient apparatus for condensing, collecting and separating biomass pyrolytic vapor, comprising a liquefying condensing collector; bio-oil is arranged in the liquefying condensing collector, the lower portion of the liquefying condensing collector is provided with a pyrolytic vapor incoming pipe that is connected with a plurality of diffusing cyclone pipes that are arranged at the bottom of the liquefying condensing collector, a wire mesh is arranged on the upper portions of the diffusing cyclone pipes, the upper portion of the liquefying condensing collector is provided with a cold bio-oil inlet, and the bottom of the liquefying condensing collector is provided with a bio-oil outlet. The liquefying condensing collector uses circulating bio-oil as a cooling medium, pyrolytic vapor liquefying is performed by means of gas-liquid direct contact, and this means is a novel condensing means.

Description

technical field [0001] The invention relates to the technical field of renewable energy utilization, in particular to a biomass pyrolysis steam efficient condensation collection and separation device. Background technique [0002] In biomass pyrolysis liquefaction technology, the cooling method of pyrolysis steam is very critical, which directly affects the collection rate of liquid product bio-oil. At present, the commonly used pyrolysis steam cooling methods mainly include direct heat exchange method based on spray cooling and indirect heat exchange method based on shell and tube heat exchange cooling. For the spray cooling method, a good heat transfer effect requires a sufficient heat transfer area. It is difficult for the atomized liquid droplets of the cooling medium bio-oil to fully and effectively contact the pyrolysis steam. Condensed gas is discharged, resulting in poor rapid cooling effect of pyrolysis steam, which reduces the collection rate of bio-oil; and for s...

AI Technical Summary

Problems solved by technology

For the spray cooling method, a good heat transfer effect requires a sufficient heat transfer area, and it is difficult for the atomized liquid droplets of the cooling medium bio-oil to fully and effectively contact the pyrolysis steam, and some small bio-oil mist droplets will not follow suit. Condensed gas is discharged, resulting in poor rapid cooling effect of pyrolysis steam, which reduces the collection rate of bio-oil; and for shell-and-tube heat exchange cooling, due to the indirect heat exchange method, it is difficult to guarantee a good cooling effect of pyrolysis steam. The generated bio-oil is easy to condense with the charcoal ash carried in the pyrolysis gas and adhere to the surface of the heat exchange wall, resulting in poor heat exchange effect, and even clogging the pipeline in severe cases, and the heavy condensate is difficult to remove

[0003] The defects of the above-mentioned pyrolysis steam cold shock method greatly affect the cost of biomass pyrolysis liquefaction and oil production, and restrict the industrial application of existing technologies

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