Internal circulation biomass carbonization device

Abstract

The invention discloses an internal circulation biomass carbonization device, and relates to the field of biomass thermochemical energy conversion. Comprising a rotary kiln, a rotary kiln gas inlet pipeline, a hood, a blanking port, a thermal insulation material, a feeder, a feeding hopper, a low-temperature wood gas pipeline, a gas heat exchanger, a high-temperature wood gas pipeline, a gas valve, a high-temperature fan, a burner, a high-temperature flue, a low-temperature flue and a tail gas fan. Internal self-circulating wood gas is used as an energy carrier, and the high-temperature wood gas releases heat in the rotary kiln to supply heat to cracking reaction of biomass raw materials; the high-temperature wood gas after heat release is converted into low-temperature wood gas, and the low-temperature wood gas enters a gas heat exchanger through a low-temperature wood gas pipeline; in the gas heat exchanger, the low-temperature wood gas and the high-temperature flue gas are subjected to non-contact heat exchange to be heated into high-temperature wood gas; and finally, the high-temperature wood gas is circulated back into the rotary kiln through power provided by the high-temperature fan.

Description

technical field [0001] The invention relates to the field of biomass thermochemical energy conversion, in particular to an internal circulation biomass carbonization device. Background technique [0002] The working principle of the existing biomass carbonization device is based on the theory of thermodynamics and pyrolysis kinetics. According to the different sources of heat energy during biomass pyrolysis, biomass carbonization devices can be divided into spontaneous combustion type and external heating type. [0003] The self-ignition biomass carbonization device provides a heat source for further carbonization through the combustion of combustible gas generated by its own decomposition. Its advantage is that it can achieve self-sufficiency in the heat required for carbonization without the need for external heat. But the disadvantage is that high carbonization temperature and precise control process are required to achieve self-sufficiency. [0004] The heat energy sou...

AI Technical Summary

Problems solved by technology

This design will make the volume of the heating equipment very large

And the heat transfer efficiency in the whole heat transfer process is relatively low

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