The wet method is to allow the gas stream to be filtered through the liquid container with powder, to purify, a powder with a liquid after drying treatment and then reused.

粉末的回收可分为湿式法和干式法。 湿式法就是让带有粉末的气流通过液体的容器进行过滤，达到净化，带有液体的粉末经过干燥处理再重复利用。 。

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Silica gel is put through a carefully controlled drying process that turns the liquid in the gel into gas.

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