Nano powder capture method

Abstract

The invention relates to a method for catching the powder whose diameter is than nanometer grade, which comprises: the first step that increasing the diameter of gas with nanometer powder exhausted by nanometer powder production and burning process; and the second step that guiding it into rotary packed bed. Wherein, the first step can mix the gas with mist drip or vapor, via the impact between nanometer powder and mist drip or vapor and the condensation nucleus as nanometer powder to process the nucleus condensation growth to increase the diameter of nanometer powder; and the second step uses the micro-drip generated by rotary packed bed and the amputation function of bed to collect the particle with increased diameter via centrifugal force. And the first step can be processed in said rotary packed bed, while the gas with nanometer powder is directly guided into said rotary packed bed for a long time.

Description

technical field [0001] The present invention relates to a method for collecting powders with a particle size above the nanometer level, in particular to a method of using a rotating packed bed to discharge the gas containing nano-powder from the manufacturing process of nano-powder, or other gases containing nano-powder discharged from the combustion process. A method of trapping gas from nanopowders. Background technique [0002] Nanopowders are often found in the delivery gas of nanomaterials or nanocomponents, or in the gas emitted by the combustion process of substances. The particle size of these nanopowders is very small (several nanometers to tens of nanometers) and cannot be collected by common powders. Method - such as cyclone dust collector, electrostatic precipitator, bag filter and other equipment to effectively supplement collection. [0003] In recent years, the research and application of rotating packed beds have solved many problems that are difficult to so...

AI Technical Summary

Problems solved by technology

The present invention can capture the nano-powders in the gas containing powders with different particle sizes by adjusting the control conditions such as the rotational speed of the rotating packed bed and the amount of washing liquid sprinkled,

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