Microwave Treatment of Multiphase Fluidized Bed Reactor and Process of Treating Phosphogypsum

Abstract

The invention discloses a microwave treatment multiphase fluidized bed reactor and a process for treating phosphogypsum, which can heat the reactor in sections, regulate the material flow field in the reactor, and separately set the reactor and the microwave generator separately; The multi-phase fluidized bed reactor for microwave treatment includes a microwave-permeable reactor and a microwave reflection shell set at the lower part of the reactor; Microwave generator for microwaves. The process for processing phosphogypsum comprises the steps of: putting solid calcium sulfate particles and liquid sulfur in a molar ratio of 1:1-1:10 into the reactor; heating the reactor by a microwave generator, and controlling the The pressure is less than 1Mpa; discharge after the reaction is completed. By adopting the microwave treatment process of multiphase fluidized bed reactor and phosphogypsum of the present invention, the efficiency of heat and mass transfer between gas, liquid and solid phases can be enhanced, subsequent separation costs can be reduced, procedures can be saved, and the chemical reaction rate can be increased.

Description

technical field [0001] The invention relates to a microwave-heated reactor and its application, in particular to a microwave-treated multiphase fluidized-bed reactor and a process for treating phosphogypsum with a microwave-treated multiphase fluidized-bed reactor. Background technique [0002] As we all know, chemical reactions often require heating or high temperature and high pressure. Traditional heating methods are based on heat conduction and heat convection. This method makes the reaction speed slower, and the selectivity and yield are not up to standard. Therefore, we are committed to speeding up the reaction rate, enhancing the yield, improving the selectivity, simplifying the post-treatment process, and improving the production efficiency of chemical reactions as a whole. [0003] Phosphogypsum, as an important renewable gypsum resource, is a solid waste discharged from the production of wet-process phosphoric acid. At present, the process of producing sulfuric ac...

AI Technical Summary

Problems solved by technology

Although the microwave fluidized bed high-pressure reactor solves the problem of fluidized bed high-pressure reaction, the control of local heating cannot be realized in the fluidized bed high-pressure reactor, and the gas cannot form a standardized flow field in the reactor.

At the same time, the waveguide is connected to the inner cavity of the reactor, so the waveguide will affect the reaction environment in the reactor. In order to avoid the influence of the waveguide on the reaction environment in the inner cavity of the reactor, an isolation mechanism is set up, which makes the structure more complicated.

Finally, the microwave is directly introduced into the reactor, so the heating of the reactor by the microwave is the overall heating, and it is impossible to realize local control and control the flow field of the gas by controlling the heating temperature

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