System and method for graded co-production of energy chemical and silicon carbon material through rice husks

Abstract

The invention discloses a system for graded co-production of an energy chemical and silicon carbon material through rice husks. The system comprises a hydrothermal baking subsystem (1), a medium temperature pyrolysis subsystem (2) and a high temperature carbonization subsystem (3) which are connected in sequence, wherein the hydrothermal baking subsystem (1) is used for preparing a liquid productrich in furfural and hydrothermal charcoal; the medium temperature pyrolysis subsystem (2) is used for obtaining bio-oil rich in sugar and medium-temperature pyrolysis carbon; the high temperature carbonization subsystem (3) comprises a rotary feeding valve (3-1), a multi-stage high temperature electric furnace (3-2), a gas channel distribution pipeline (3-3), a product cooling device (3-8), a coke cooling tank (3-12) and a volatile condensing device (3-20), and is used for multi-stage high temperature carbonization and activation of the pyrolysis carbon to obtain the silicon carbon material with a energy storage characteristic. The invention also provides a method for the graded co-production of the energy chemical and silicon carbon material through the rice husks. The system and methodhave the advantages that the high-quality energy chemical and silicon carbon material can be simultaneously obtained, the treatment efficiency is high, the heat utilization rate is high, and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of biomass polygeneration, and more specifically relates to a system and method for rice husk classification and cogeneration of energy chemicals and silicon carbon materials. Background technique [0002] The utilization of biomass is one of the important contents of the ecological conservation development zone. Making full use of waste biomass resources and turning waste into treasure is an important development direction of biomass. Rice is one of the most widely used food crops for humans, and the cultivation of rice produces a large amount of rice husk. As a conventional agricultural waste, rice husk has a huge annual output, but its harmless and resourceful utilization is difficult. [0003] Rice husk is mainly composed of hemicellulose, cellulose and lignin. Through pyrolysis technology, rice husk can be converted into valuable charcoal, gas and oil products, and the utilization value of rice husk ca...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a system for the grading and co-production of energy chemicals and silicon carbon materials from rice husks, which adopts sequentially connected hydrothermal roasting subsystems, medium-temperature pyrolysis subsystems, and high-temperature carbonization subsystems, and optimized the specific structure and mutual assembly relationship of each subsystem, which overcomes the current problems of complex liquid product components, low concentration of active ingredients, and low coke quality in biomass pyrolysis, and can realize the production of rice husks. By graded utilization, furfural, sugar and coke can be enriched at different temperature ranges, and high-quality energy chemicals and silicon carbon materials can be obtained at the same time. It has the characteristics of high processing efficiency, high heat utilization rate, and convenient operation.

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