A novel spray drying device and drying process for lithium iron phosphate slurry

By introducing a circulation pipeline and a gradient temperature controlled coil assembly into the lithium iron phosphate slurry spray drying device, a closed-loop circulation of the drying medium is achieved, solving the problems of high energy consumption and large equipment size in the existing technology, improving thermal efficiency and reducing operating costs.

CN122141264APending Publication Date: 2026-06-05ZHEJIANG YOUSHAN NEW ENERGY TECHNOLOGY CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG YOUSHAN NEW ENERGY TECHNOLOGY CO LTD
Filing Date
2026-04-30
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing lithium iron phosphate slurry spray drying process is energy-intensive, requires large equipment, and has low heat recovery efficiency, resulting in high operating costs and large equipment investment.

Method used

A closed-loop circulation system is adopted between the vertical spray drying tank and the slurry tank, including slurry delivery pipeline and air circulation pipeline. Combined with the coil evaporation unit and the sonic soot blower, the system realizes the closed-loop circulation of the drying medium. The gradient temperature control and heat recovery of the coil unit reduce the dependence on external fresh air.

Benefits of technology

It reduces energy consumption, decreases equipment size, improves thermal efficiency and heat recovery rate, lowers operating costs, and avoids material accumulation and clumping at the bottom of the tank.

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Abstract

The present application belongs to the technical field of material drying equipment, and particularly relates to a novel spray drying device for lithium iron phosphate slurry and a drying process. In view of the problems of high energy consumption, large equipment and high operation cost caused by the use of a large amount of hot air convection drying mode in the existing spray drying process, the present application proposes the following scheme, which comprises a spray drying tank, a slurry tank, a circulating pipeline assembly, a bag dust collector, an atomizing nozzle assembly, a sonic soot blower and a coil evaporating assembly. Vacuum negative pressure operation is adopted, no external fresh air is introduced, the hot exhaust gas after drying is respectively preheated for slurry and compressed air through shunting, condensed water is recycled, and non-condensable gas is recycled after purification and pressurization. The present application completely breaks the traditional hot air spray drying technical paradigm through vacuum low-temperature contact drying, reduces the equipment volume by more than 60%, reduces the energy consumption by more than 50%, and the heat recovery rate is more than 40%, and at the same time, the water resource is recycled, which has significant economic and environmental benefits.
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