Vertical pyrolysis apparatus for biochar production

Abstract

The invention discloses a vertical pyrolysis apparatus for biochar production, which comprises a furnace body and a sedimentation reactor, wherein a first star-shaped feeder is transversely arranged in a feed port at the top of the furnace body, and a second star-shaped feeder is arranged at the lower part; an inner division layer divides the furnace body into a raw material pyrolysis zone and a biochar cooling zone; the outer side of an annular guide plate is fixed on the inner side of the furnace body, the circle center position of a circular guide plate is fixed in the center of the furnace body and arranged in the inner cavity of the sedimentation reactor, and the sedimentation reactor is positioned between the two guide plates and kept out of contact with the two guide plates; the upper part of the sedimentation reactor is provided with a pyrolysis gas pipeline communicated with a pyrolysis gas outlet; the raw material pyrolysis zone is provided with a flue gas inlet and a flue gas outlet, the biochar cooling zone is provided with an air inlet and an air outlet, and a flue gas pipe and an air pipe respectively extend from the outside of the furnace body into the inner cavity of the sedimentation reactor; and a star-shaped discharger is transversely mounted in a discharge port at the bottom of the furnace body. The apparatus can ensure that the raw material is uniformly heated and the pyrolysis time is controllable in production, can realize continuous production, and is high in production efficiency and energy utilization rate.

Description

technical field [0001] The invention relates to a pyrolysis device for biomass and its derivatives, in particular to a vertical pyrolysis device for biochar production. Background technique [0002] Biochar is a solid pyrolysis product produced by pyrolysis (carbonization) of biomass and its derivatives in an anoxic environment. With the discovery of Amazon's "black soil", biochar has attracted widespread attention from scientists due to its huge role in improving soil and reducing greenhouse gas emissions. In principle, the preparation process of biochar is very simple. The biochar is heated in an oxygen-deficient environment, and the biochar is gradually decomposed by heat, releasing a part of volatile matter, which is converted into pyrolysis gas and pyrolysis oil, while the remaining solid The product is biochar. Therefore, the oldest earth kiln and brick kiln can produce biochar. In recent years, new drum crackers, screw crackers and rotary kiln crackers can also be u...

AI Technical Summary

Problems solved by technology

However, these production equipment either target pyrolysis gas or pyrolysis oil, or target solid products mainly used as fuel (more precisely, charcoal, coke), and these solid products are different from biochar in nature and use. There are huge differences in the above, so these devices are not suitable for the biochar production process for the application purpose of soil improvement and greenhouse gas reduction

[0003] The same as the production of pyrolysis oil, pyrolysis gas, and charcoal (coke), the raw materials are poor conductors of heat. In the actual production process, the surface raw materials have been fully heated and the pyrolysis is completed, while the internal raw materials are far from reaching the predetermined temperature, resulting in Its long pyrolysis time reduces production efficiency and seriously affects the stability of product properties

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