Microwave output energy controllable pyrolysis method and device of unit mass reactors

Abstract

The invention relates to a microwave output energy controllable pyrolysis method and a device of unit mass reactors. According to the method, microwave power is reduced via automatic control with the reduction of reaction matter amount and prolonging of reaction time, and the constant unit mass microwave output energy of the reactors in a whole pyrolysis process is ensured. The device comprises a microwave cavity, a microwave generator, a mass measurement system, a temperature measurement system, a PLC (Programmable Logic Controller) real-time data acquisition control system, a system for displaying an image of a material in the cavity in real time, a background computer configuration software acquisition and control system, a condensing system and a negative pressure system. The device is high in automation degree and easy and simple to operate, with the adoption of the device and the method, high quality hydrocarbon fuel, green chemicals and the like pyrolyzed by the various reactors under the optimal microwave condition can be obtained, and the reactors have industrial application prospects.

Description

technical field [0001] The invention belongs to the fields of biomass energy and oleochemical energy. Background technique [0002] In the reaction system of traditional pyrolysis oil crops, the temperature difference between various parts of the material is extremely large, and there is no material basis for preferential heat supply to polar functional groups in the heat transfer process. Therefore, the break order of chemical bonds in the traditional pyrolysis process is random and unpredictable. Microwave Assisted Pyrolysis (MAP) can significantly improve the catalytic orientation of biomass cracking, so that the cracked products show good selectivity. [0003] Microwave pyrolysis reactor is the key to the technology of biomass pyrolysis to prepare green chemicals. Although microwave pyrolysis technology has made great progress, the research on microwave pyrolysis furnace is not enough. After several generations of development, the microwave cracking furnace has integrat...

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Problems solved by technology

[0003] The microwave pyrolysis reactor is the key to the technology of producing green chemicals from biomass pyrolysis. Although the microwave pyrolysis technology has made great progress, the research on microwave pyrolysis furnace is not enough.

After several generations of development, the microwave cracking furnace has integrated the advantages of rapid heating, good uniformity, and easy operation and control, but it has not yet realized the controllable cracking process of unit mass reactants absorbing microwaves. Generally, the reactants in the microwave cracking process As the pyrolysis reaction progresses, the mass decreases continuously, but the microwave output power does not change. Therefore, the reactant per unit mass absorbs too much microwave in the later stage of the reaction, and the temperature rises sharply, and then coking reaction occurs, which affects the quality of green chemicals; In addition, excess microwaves not absorbed by the reactants may affect the magnetron, resulting in reduced service life

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