Method for generating hydroxide radicals by employing ultrasonic atomization-assisted ionization discharge

Abstract

The invention discloses a method for generating hydroxide radicals by employing ultrasonic atomization-assisted ionization discharge. The method comprises the following steps: submerging a high-frequency piezoelectric ceramic plate with an aqueous hydrogen peroxide solution, so as to prepare an ultrasonic transducer; converting electric energy into mechanical resonance by virtue of the transducer; exerting a resonant electrical signal, so that the transducer generates ultrasonic vibration in the range of 1-2MHz; atomizing a hydrogen peroxide solution into aerosol of which the diameter is 0.1-1mum by virtue of an ultrasonic wave; feeding the aerosol into an ionization discharge plasma reactor; generating hydroxyl radicals under action of high frequency and high voltage, wherein the concentration of hydrogen peroxide is 1%-20%; discharge in the plasma reactor is narrow-gap strong ionization gas discharge; the discharge reduced electric field intensity is 400Td-600Td; a fan is arranged at the outlet of the plasma reactor; and a gas flow with the hydroxide radicals, which is obtained after the fan is started, is conveyed to the surface of a to-be-sterilized object.

Description

technical field [0001] The invention relates to a method for generating hydroxyl free radicals by ultrasonic atomization assisted ionization discharge. Background technique [0002] There are several types of surface disinfection and sterilization methods: [0003] 1. Traditional thermal sterilization technology [0004] Traditional heat sterilization is an effective sterilization method, which can kill various microorganisms, and the degree of sterilization can be accurately controlled. Although the thermal sterilization method is widely used, the high temperature required by this method can easily lead to the decomposition of heat-sensitive components and the loss of volatile components, and the energy consumption is high, which can easily damage precision medical instruments. [0005] 2. Non-thermal sterilization technology [0006] (1) Ultraviolet rays: can kill various microorganisms, including bacterial propagules, spores, mycobacteria, viruses, fungi, rickettsia an...

AI Technical Summary

Problems solved by technology

However, the conventional method for generating hydroxyl radicals has the following problems: when processing hydroxyl radicals, a large amount of catalysts, oxidants, etc. need to be added, and there are problems such as secondary pollution, safety, and increased costs; restricted by various factors, most processes have not yet achieved high efficiency, Large-scale generation of high-concentration hydroxyl radicals is difficult to apply to actual pollutant treatment projects

[0014] Chinese application 200810156932X discloses a method of using oxygen and atomized water to carry out hydroxyl radicals; in this method, oxygen or oxygen in the air is used as one of the reactants, but in practical applications, gaseous oxygen must participate in the atomization The water needs to be mixed evenly, and a large amount of water mist will adhere to the wall of the container during the mixing process, which will reduce the water content entering the plasma reactor and reduce the efficiency; and this application uses hydrogen peroxide, which is soluble in water , directly atomized with water, directly into the plasma reactor, with few procedures in the middle, the atomized water has no chance to settle down here