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Using cavitation jet technology to degrade organic pollutants in the ocean

Date:2024-05-13   Visits:46

There are many types of jets produced by high-pressure cleaning machines, and they are widely used. Cavitation jet is one of the many types of high-pressure water jets. We all know that cavitation jet underwater cleaning technology can clean marine organisms attached to ship hulls, attachments to submarine oil pipelines, etc. However, we do not know that cavitation jet can also degrade organic pollutants in the ocean. So how does cavitation jet degrade organic pollutants in water? What about pollutants?


Cavitation jet is a special form of high-pressure water jet. Cavitation refers to the explosive growth of cavitation bubbles (i.e., gas nuclei, with a radius generally below 20 μm) formed due to the evaporation of liquid due to the local low pressure of the liquid flow system (lower than the saturated vapor pressure of the liquid at the corresponding temperature). When the cavitation bubble collapses, it will cause a powerful micro-jet impact and produce a very short strong pressure pulse. The small space around the bubble will form a local hot spot, resulting in extreme high temperature and high pressure, accompanied by complex physical reactions, chemical reactions, mechanical effects, and electrochemistry. effect and thermal effect. According to calculations, when the free cavitation bubble collapses, the flow velocity of the microjet near the wall can reach 70 to 180m/s, and the impact force generated on the surface of the object is as high as 140 to 170Mpa. The diameter of the microjet is about 2 to 3μm, and the surface is affected by micro The number of jet impacts is about 100 to 1000 times/(s·cm²). Cavitation jet underwater cleaning technology is a new underwater facility cleaning technology that introduces cavitation into water jet cleaning technology. It artificially generates high-density cavitation bubbles in the water jet beam and utilizes a large number of cavitation bubbles. The strong impact force of the micro-jet generated by collapsing in local micro-areas on the surface of the object achieves the purpose of cleaning the hard dirt and attached marine organisms in the facility.


Current theoretical and experimental research shows that it is very effective to use the energy of cavitation collapse to degrade organic pollutants in water. The degradation mechanisms are mainly direct thermal decomposition, supercritical water oxidation and free radical reactions.


In summary, the use of cavitation water jets generated by high-pressure cleaning machines to degrade organic pollutants in the ocean is very effective. As long as you make full use of the physical and chemical effects produced by high-pressure cleaners, you will be able to open up a new field of water treatment technology.

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