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Process principle of hydrogen peroxide dry mist sterilizer
Date: 2025-04-21Read: 30
The hydrogen peroxide dry mist sterilizer is mainly suitable for overall sterilization of enclosed or semi enclosed spaces such as pharmaceutical clean areas, laboratory isolators, and freeze-drying machines, especially for sterilization needs that require fast, environmentally friendly, and residue free sterilization.
Today, the editor will introduce the process principle of hydrogen peroxide dry mist sterilizer from the following aspects:
1ใ Dry mist generation process
1. Physical atomization technology
By driving the nozzle with a high-pressure gas source (built-in compressor or external gas source), the liquid hydrogen peroxide solution is dispersed into dry mist particles of about 5 microns, ensuring that the atomized particles are uniform and suspended for a long time.
Some devices use a combination of high-speed liquid pumps and ultra high speed fans to crush the liquid into submicron particles through centrifugal rotation and gas tearing, enhancing diffusion ability.
2. Dry fog characteristics
Dry mist particles have low humidity and high diffusivity, which can prevent surface condensation and reduce the risk of corrosion to materials such as metals and electronic devices.
2ใ Sterilization mechanism
1. Release of active substances
The decomposition of hydrogen peroxide in a dry mist state produces hydroxyl radicals (ยท OH) and reactive oxygen species, which destroy the cell membrane, proteins, and genetic material of microorganisms through strong oxidation, achieving efficient killing of bacteria, spores, and other microorganisms.
The sterilization ability of gaseous hydrogen peroxide is significantly better than that of liquid hydrogen peroxide, with a larger contact area and stronger penetration with microorganisms.
2. Space coverage and penetration
Dry mist particles can be evenly distributed in enclosed spaces, penetrating through efficient filters, pipelines, and complex internal structures of equipment (such as freeze-drying machine chambers and biosafety cabinets) to achieve sterilization.
3ใ Core advantages
1. Sterilization efficiency
It can achieve a log4-6 power killing rate for biological indicators such as thermophilic Bacillus subtilis, meeting the sterilization needs of high cleanliness environments such as pharmaceuticals and healthcare.
2. Compatibility and Security
Compared to traditional methods such as formaldehyde and ozone, dry mist has low residual hydrogen peroxide and controllable corrosiveness, making it suitable for scenarios with strict requirements for material compatibility.
