Microwave chemical reaction frequency allocation control method, central processing device and system

Abstract

The application discloses a microwave chemical reaction frequency allocation control method, a central processing device and a microwave chemical reaction system. The method includes: obtaining a calculation model according to the chemical reaction equation, dielectric function and reaction parameters; Step size is used for multi-physics calculations, and the optimal frequency set for each reaction time period is obtained according to the calculation results; the target frequency with the best performance is selected from the optimal frequency set for the first reaction time period and applied; for the remaining reaction time periods , to obtain the reflected power and temperature at the end of the previous reaction time period, and obtain the matching frequency matching the reflected power and temperature from the preferred frequency set of the current reaction time period and act on the current reaction time period. The above-mentioned technical solution disclosed in the present application improves the promotion effect of microwaves by selecting corresponding frequencies from each preferred frequency set to act on, so as to improve the efficiency of chemical reactions and reduce the probability of occurrence of hot spots and thermal runaway.

Description

technical field [0001] The present application relates to the technical field of microwave chemistry, and more specifically, to a microwave chemical reaction frequency allocation control method, a central processing device and a microwave chemical reaction system. Background technique [0002] With the rapid development of science and technology, microwave has been widely used in chemical catalysis, synthesis, extraction, digestion and other fields, and thus microwave chemistry has been formed. [0003] At present, most of the existing microwave chemical reaction devices use fixed-frequency microwaves to act on chemical reactions, and the distribution of standing waves formed by them is relatively fixed. However, since chemical reactions change dynamically with time, the ratio of reactants and products The components will change dynamically, so its absorption and reflection of microwaves also have time-varying characteristics. Therefore, the fixed-frequency microwaves may ha...

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Problems solved by technology

[0003] At present, most of the existing microwave chemical reaction devices use fixed-frequency microwaves to act on chemical reactions, and the distribution of standing waves formed by them is relatively fixed. However, since chemical reactions change dynamically with time, the ratio of reactants and products The components will change dynamically, so its absorption and reflection of microwaves also have time-varying characteristics. Therefore, the fixed-frequency microwaves may have a good promotion effect at the beginning, but as the reaction progresses, its promotion effect will decrease. reduce, or even lose the promoting effect, which will lead to a decrease in the efficiency of the chemical reaction. In addition, the use of fixed-frequency microwaves is also prone to problems of excessive temperature in local areas and thermal runaway problems, which will not only affect the generation of affect the quality of the material, and even cause safety hazards such as burning or explosion

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