A Rotary Microwave Vacuum Dryer

Abstract

The invention discloses a rotary microwave vacuum dryer, which comprises a bracket (11) with an operation panel (17), a microwave oven body (2) with a microwave generator (1), and a furnace with a handle (20) on the furnace door The door (23), the microwave oven body (2) is provided with a material holding chamber (3), and the vacuum suction filter tube (4) with a filter head (22) is established in the holding material chamber (3), and the material holding chamber ( One end of 3) is connected to the vacuum suction filter tube (4), and the vacuum suction filter tube (4) is connected to the condensation recovery device (24), and the condensation recovery device (24) is connected to the vacuum pump (25), and a vacuum is set on the vacuum suction filtration tube (4). Table (7), a temperature sensor (8) is arranged in the vacuum suction filter pipe (4), the other end of the material holding cavity (3) is connected to the shaft (14), and the shaft (14) is connected to the frequency conversion motor (13), and the material holding The lower end of the cavity (3) is provided with a material inlet and outlet (12). The invention has the advantages of simple structure, high drying efficiency, uniform material components without segregation, and is especially suitable for the vacuum drying and granulation process of slurry in the field of positive electrode materials for lithium-ion batteries.

Description

Technical field: [0001] The invention relates to a rotary microwave vacuum dryer, which is suitable for drying treatment of materials in the fields of heat-sensitive chemical industry, food, pharmaceuticals, etc., and particularly relates to the vacuum drying and granulation process of slurry after liquid-phase mechanical ball milling of raw materials in the field of positive electrode materials of lithium-ion batteries . Background technique: [0002] Vacuum drying is widely used in the field of lithium ion battery cathode material preparation. The preparation process of lithium-ion battery cathode materials generally requires uniform mixing of raw materials, adding a large amount of organic solvents such as ethanol or acetone for liquid-phase mechanical grinding to form a slurry, and then vacuum drying the slurry, while recovering the solvent to form a precursor. The precursor is calcined at high temperature to generate LiCoO 2 , LiMn 2 o 4 or LiFePO 4 and other batte...

AI Technical Summary

Problems solved by technology

Invention patent ZL02104214.4 discloses a "rotary continuous microwave drying device". Although it is a dynamic microwave drying, the surface of the material is constantly moving and updated, avoiding the accumulation of heat and water vapor, but because the device cannot pump the material container Vacuum, which cannot be realized for solvents that need to be recovered or systems that contain strong irritating and toxic gases

The utility model patent "ZL 02211756.3" discloses "a rotary continuous microwave dryer". Especially when encountering viscous materials, there is a problem that the materials cannot be discharged because they are embedded in the grooves, and the grooves make it impossible for the materials to be manufactured. grain purpose

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