A device and method for high-efficiency dedusting of biomass rapid pyrolysis steam

Abstract

The invention provides an apparatus for efficient dust removal with vapor by virtue of fast pyrolysis of biomass. In the flowing direction of pyrolysis vapor, a cyclone dust collector, a granular bed dust collector and a metal mesh dust collector are sequentially connected, wherein a first electric heating furnace is arranged on the outer side of the cyclone dust collector; a second electric heating furnace is arranged on the outer sides of the granular bed dust collector and the metal mesh dust collector; and by virtue of the first electric heating furnace and the second electric heating furnace, the pyrolysis vapor temperature inside the cyclone dust collector, the granular bed dust collector, the metal mesh dust collector as well as the entire front and rear vapor pipelines is kept at 400-600 DEG C. According to the apparatus disclosed by the invention, by cyclone dust removal, the load of two later stages of dust removal can be effectively reduced and the shortcoming that the two later stages cannot be operated continuously for a long time can be overcome; through granular bed dust removal, the dust removal load of a metal mesh is further reduced and the abrasion of the metal screen can be relieved; and by virtue of the metal mesh dust collector, small-size granules larger than the aperture of the metal mesh can be stably filtered so as to provide guarantee for the two previous stages of dust removal to guarantee the efficient dust removal effect of the pyrolysis vapor.

Description

technical field [0001] The invention relates to the field of utilization of biomass resources, and in particular discloses a device and method for high-efficiency dedusting of biomass rapid pyrolysis steam. Background technique [0002] At present, global fossil fuel resources are in short supply. At the same time, the use of fossil energy has led to increasingly serious greenhouse effects and environmental pollution. It is particularly important to vigorously develop renewable and clean energy. Biomass is the only renewable energy that can be converted into gas, solid and liquid fuels, and has great compatibility with existing fossil fuel technologies. The carbon dioxide absorbed during the growth of biomass is equivalent to the amount of carbon dioxide emitted during utilization, and the net emission of carbon dioxide is approximately zero, which will not aggravate the greenhouse effect. Vigorously develop high-end biomass-based products (oxygenated liquid fuels and high-...

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Problems solved by technology

[0006] Purpose of the invention: the present invention aims to solve the problem that small particle size (less than 10 μm) particles cannot be effectively removed when a single cyclone separation dust removal method is used for biomass pyrolysis steam and The problem that the dust removal effect is not stable due to factors such as gas volume fluctuations, provides a device and method for efficient dust removal of biomass rapid pyrolysis steam

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