Uranyl nitrate hexahydrate feeding device for fluidized bed denitration technology

Abstract

The invention relates to a production process for producing uranium trioxide by utilizing a fluidized bed denitration technology, in particular relates to a device for feeding a uranyl nitrate hexahydrate (UNH) solution in the process, and relates to an atomization nozzle joint. When an atomization nozzle of a denitration fluidized bed is designed, a pyrolysis denitration condition of the UNH solution is sufficiently considered, fault points are reasonably avoided and the design is reasonable. The front end of the nozzle is leveled with a reactor wall; under the condition of properly controlling a gas-liquid ratio, a condition that the UNH solution flows off along a furnace wall to cause material sintering basically does not occur. A gas phase and a liquid phase of the atomization nozzle are separately designed and are only crossed at the nozzle; pressure of atomized gas is greater than pressure of fluidized gas; hot gas cannot enter a nozzle space to be subjected to pyrolysis denitration and the nozzle is not blocked. Actual application shows that the atomization nozzle is stable and safe in operation and has good continuous operation performance.

Description

technical field [0001] The invention relates to a production process for producing uranium trioxide by fluidized bed denitrification technology, in particular to a device for feeding uranyl nitrate solution (UNH) in the process. Background technique [0002] At present, the preparation of UO by pyrolysis and denitrification at UNH 3 In actual production, the denitrification reactors used mainly include tank type denitrification reactors, horizontal stirred bed denitrification reactors, fluidized bed denitrification reactors, etc. Among them, the fluidized bed denitrification reactor has become the most widely used reactor in the UNH denitrification process because of its advantages such as simple structure, convenient operation, easy control, and high production intensity. [0003] The fluidized bed denitration reactor is mainly composed of several parts such as the reaction section, the feeding device, the expansion section and the built-in filter, which can realize the co...

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Problems solved by technology

[0011] At present, there is no successful case of engineering application of fluidized bed denitrification reactor nozzles in China, and there is an urgent need for an atomizing nozzle suitable for fluidized bed denitrification reactors.

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