External circulation ammonification reactor

Abstract

The invention discloses an external circulation ammoniation reactor. The external circulation ammoniation reactor comprises a settling separator, a stirring device, a lifting pipe, a return pipe, a circulating pump, a gas distributor and a plurality of mesh grids, wherein the gas distributor comprises a gas inlet pipe and a gas ammonia nozzle, the gas ammonia nozzle is detachably installed at the gas outlet end of the gas inlet pipe, the gas ammonia nozzle horizontally sprays gas, and the multiple mesh grids are arranged in the lifting pipe at intervals and located above the gas distributor. The gas ammonia nozzle is detachably installed on the gas inlet pipe, the gas ammonia nozzles with different hole diameters can be replaced conveniently, the requirements for different gas phase treatment capacities can be met, the nozzles conduct horizontal spraying, the problem that slurry blocks gas spraying holes can be avoided, flocculent solid particles can be detached through the mesh, and the viscosity is reduced. And on the other hand, the mesh breaks large-size bubbles in the central area of the lifting pipe, so that the bubble breaking probability and the bubble surface updating rate are increased, the specific surface area of the bubbles is increased, and the gas-liquid two-phase mass transfer reaction rate can be effectively increased through the mesh structure.

Description

technical field [0001] The invention relates to the technical field of phosphorous ammonia production, in particular to an outer circulation ammonification reactor. Background technique [0002] Monoammonium phosphate is widely used in flame retardant, fire extinguishing agent, pharmaceutical industry, feed additive, high-grade fertilizer, and its main raw material is phosphoric acid. Phosphoric acid production mainly adopts thermal method and wet method, and thermal method phosphoric acid has problems such as high energy consumption and serious pollution. Therefore, the technology of wet method phosphoric acid to produce ammonium phosphate is a hot research issue at present. The continuous ammonification and neutralization of phosphoric acid is the most important process in the production of ammonium phosphate, and the external circulation ammonification reactor is mainly used. Although my country's phosphate rock resources are abundant, the trend of depletion is accelerat...

AI Technical Summary

Problems solved by technology

The uneven distribution of flocculent solid particles in the slurry makes the gas-liquid distribution extremely uneven, hindering the gas-liquid two-phase mass transfer reaction, and the ammonia escape rate is high

The flocculated solid particles in the slurry can also easily cause the blockage of the distributor orifice

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