Pyrolysis system and pyrolysis method for solid carbonaceous materials

Abstract

The invention relates to a pyrolysis system for a solid carbonic material. The pyrolysis system comprises a circulating fluid bed hearth, a first separator, a solid heat carrier channel and a pyrolysis channel, wherein the first separator is connected with a smoke outlet of a circulating fluid bed; a solid heat carrier flows inside the solid heat carrier channel in a fluidized state; the granular solid carbonic material containing a volatile component is added from the upper part, passes through the pyrolysis channel from top to bottom by using the gravity in a fluidized state, and generates pyrolysis reaction; the pyrolysis channel and the solid heat carrier channel are partitioned by a heat-conducting dividing wall; the solid heat carrier and the solid carbonic material inside the pyrolysis channel are subjected to heat exchange through the heat-conducting dividing wall; the solid carbonic material is heated and subjected to pyrolysis reaction; the solid heat carrier inlet of the solid heat carrier channel is communicated with a solid outlet of the first separator; and an overflow port is formed at the lateral wall of the solid heat carrier channel, and communicated with a material return opening of the hearth. The invention also relates to a pyrolysis method for the solid carbonic material.

Description

technical field [0001] The invention relates to the pyrolysis of solid carbonaceous materials, in particular to a pyrolysis system and method for granular solid carbonaceous materials containing volatile matter. Background technique [0002] The generation of coal gas, tar and semi-coke through pyrolysis is a high-value utilization method for cascade utilization of low-rank coal resources to obtain high value-added products, with remarkable economic and social benefits. In recent years, oil shale has become the most potential non-traditional hydrocarbon resource recognized in the world. Because its oil content is generally 4% to 20%, and the highest can reach 30%, in addition to combustion for power generation, the main utilization method is carbonization and refining. After the oil shale is heated and carbonized, the kerogen contained in it decomposes to produce shale oil, carbonized gas and shale semi-coke; the shale oil can be used as fuel oil, and can also be further pro...

AI Technical Summary

Problems solved by technology

However, due to the poor thermal conductivity of coal, the material heating rate is slow and the temperature is uneven in the indirect heat exchange coal pyrolysis process, which easily leads to problems such as long pyrolysis time, low tar yield, and high heavy oil content.

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