Coke reactivity general prediction method and system suitable for solid fuel pyrolysis

Abstract

The invention discloses a coke reactivity general prediction method and system suitable for solid fuel pyrolysis and relates to the field of solid fuel thermochemical conversion. The method mainly comprises the following steps: acquiring solid fuel sample characteristic parameters and reaction conditions; according to the contribution of different components of a solid fuel sample to coke pores, dividing components into different microstructures, obtaining coke pore characteristic parameters and structural factors according to solid fuel sample characteristic parameters, obtaining initial reactivity of coke in a non-catalytic state according to the coke pore characteristic parameters and reaction conditions, and obtaining catalytic factors according to the content of internal catalytic elements; and obtaining the initial reactivity of the pyrolysis coke of the solid fuel sample according to the initial reactivity of the coke in the non-catalytic state and the catalytic factor, and predicting the full conversion process of the coke reactivity in combination with the random pore model. The gas-solid collision theory of reaction kinetics and the fractal characteristics of the coke pore structure are utilized to predict the whole process of the coke reaction rate.

Description

technical field [0001] The invention relates to the field of solid fuel thermochemical conversion, in particular to a general calculation method suitable for predicting the reactivity of solid fuel pyrolysis coke. Background technique [0002] Solid fuels include coal, biomass, petroleum coke, oil shale, and garbage. Among the many high-value utilization methods of solid fuels, thermochemical conversion technology can convert solid fuels into high-grade combustible gases and high value-added by-products such as tar and coke. [0003] Thermochemical conversion technology mainly includes two processes: the pyrolysis of solid fuel and the gasification of coke. After the solid fuel is volatilized and analyzed, the remaining solid composed of carbon and ash is coke. Although the content of coke only accounts for 10% of the pyrolysis product -30%, but its gasification time accounts for 80-90% of the total process, which determines the overall residence time. Therefore, using cok...

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Problems solved by technology

[0004] As the core equipment of the thermochemical conversion process, the design method of the gasifier depends on the characteristics of the solid fuel in the furnace and the operating conditions. However, there is still a lack of a set of predictive methods for the wide adaptability of fuels and operating conditions.

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