VHP plasma aerosol generation method and device

Abstract

The invention provides a VHP plasma aerosol generation method. The method comprises the steps that liquid hydrogen peroxide is processed by a VHP vaporizer to form VHP particles; the VHP particles is processed through an electric field to form VHP+ and VHP- ions; the VHP+ and VHP- ions and the VHP particles are mixed to form a VHP+ and VHP- plasma; an aerosol stabilizer is added into the VHP+ and VHP- plasma to form VHP plasma aerosol. The invention further provides a VHP plasma aerosol generation device. The obtained VHP plasma aerosol is stable in status, high in sterilization efficiency and not prone to sedimentation, does not corrode an instrument, and overcomes the defects that in the prior art, the hydrogen peroxide sterilization efficiency is low, the hydrogen peroxide residual quantity is large, and hydrogen peroxide is likely to be sedimented on the surface, and an instrument is corroded.

Description

technical field [0001] The invention belongs to the field of microorganism sterilization, and in particular relates to a VHP plasma aerosol generation method and device. Background technique [0002] Hydrogen peroxide, chemical formula H 2 o 2 , its aqueous solution is commonly known as hydrogen peroxide, and its appearance is a colorless transparent liquid. It is a strong oxidant and is suitable for wound disinfection and environment and food disinfection. [0003] The bactericidal performance of liquid hydrogen peroxide has been recognized for more than 100 years, and it has the characteristics of environmental protection and high efficiency. However, liquid hydrogen peroxide requires very high concentrations and long contact times to be sporicidal. Later, it was found that gaseous hydrogen peroxide has a higher sporicidal ability in a low concentration state than in a liquid state. The main principle is to generate free hydroxyl groups for attacking cell components, in...

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Problems solved by technology

This method of vaporizing hydrogen peroxide is relatively simple, low in cost, and widely used, but has the following disadvantages: ①The particle size distribution of the vaporized hydrogen peroxide vapor is wide, and the particle size of the vapor cannot be controlled, so it is easy to condense into a liquid Drops, the sterilization effect is poor; ②The heating power consumption is too large, and the sterilization energy consumption is large; ③The temperature of vaporized hydrogen peroxide is high, and it is easy to condense when it is cold, and it condenses into a liquid state

④Vaporized hydrogen peroxide has a wide particle size distribution, so it is easy to adhere to the surface of the object and is difficult to remove, with a large amount of residue

⑤ Due to the high vaporization temperature, hydrogen peroxide has been decomposed into water and oxygen, which reduces the utilization efficiency of hydrogen peroxide

But there are the following disadvantages: ①The vaporized hydrogen peroxide mist has a wide particle size distribution and is easy to condense into liquid droplets, resulting in poor sterilization effect. At the same time, large particles are easy to settle and attach to the surface of objects, and the residual amount is large, which is difficult to remove; ②The volume of the spray system is large, which is not conducive to the miniaturization of the equipment; ③The gas consumption is large, and the high-pressure gas needs to be treated separately before it can be used

Its disadvantages are: ①Because the hydroxyl radical (OH-) is alkaline, it is easy to corrode the metal surface; ②Because the hydroxyl radical (OH-) is in an ion state, it is unstable and cannot be kept in a free state for a long time, and it is easy to combine with organic matter Become alcohol (ROH), phenol (ArOH), benzene and other substances

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