Abstract: Provided are a double-layer sound insulation and noise reduction device and an atomizer. The double-layer sound insulation and noise reduction device includes a noise reduction main body, a water baffle and a connecting member, the noise reduction main body includes an annular outer wall and an annular inner wall, the annular inner wall is spaced apart from the annular outer wall to form a sound insulation cavity, and the connecting member is connected between the annular inner wall and the annular outer wall; a side of the annular outer wall is provided with an outer wall ventilation opening, a side of the annular inner wall is provided with an inner wall ventilation opening communicating with the outer wall ventilation opening, and a bottom of the annular inner wall is formed with a water passing hole.

Abstract: The present invention relates to a process for the regeneration of the resins in a fixed double-bed type ion exchange apparatus and the apparatus thereof. Said process of regeneration comprises of following steps: supplying a dilute regeneration solution to flow upwardly to backwash and pre-regenerate the resins; immersing statically the resins with said dilute regeneration solution; supplying a regeneration solution with higher concentration to flow upwardly to further regenerate the resins; supplying water to pass upwardly to replace said concentrated regeneration solution; and finally supplying water to pass downwardly to wash the upper part of upper resin layer, upper resin layer and both resin layers in turn. Said apparatus is characterized in that a lower discharging means for regeneration is disposed around the boundary surface of the two layers of resins.