The US UL867 safety standard for ozone is ≤0.05PPM, and the EU standard is formulated with reference to the US standard. my country's standard GB simply says that UL867 means that under laboratory conditions (temperature 25°C, humidity 50%), the cumulative concentration produced by any ozone source cannot exceed 0.05PPM.
Ozone destruction catalyst usually be manganese oxide , rare earth, and so on.Among them, manganese oxide is the most widely used catalyst. It can oxidize harmful ozone into oxygen at room temperature.
At present, many air purifier manufacturers and testing institutions have not conducted ozone safety testing of air purifiers in accordance with the above-mentioned national mandatory standards.The percentage of ozone concentration should not exceed 5×10-6. (Note, no more than 0.05ppm. About 0.1mg/m3)
The COVID-19 pandemic has brought heightened attention to air quality indoor . People are thinking about how these invisible virus particles can spread indoors. However, the hazards of the indoor environment are not just the virus that causes the epidemic. According to WHO, air pollution is the world's greatest environmental health threat. Many people have always believed that ozone in the air is a double-edged sword. It has the side of sterilizing and inactivating viruses, but also has the side of endangering human health. Modern research suggests that ozone in indoor air has risen to be one of the most important pollutants.
The places where we can smell the obvious smell of ozone are usually in printing shops and other places. The smell of ozone in the hotel kitchen may be produced by the ultraviolet lamp tube for anti-virus in the kitchen, the UV lamp tube inside the hood all-in-one machine, the UV lamp tube in the pipeline, and the high-voltage electrostatic fume purification connected to the pipeline. device. We can basically find the source of ozone smell by understanding the kitchen utensils inside our kitchen and the corresponding fume exhaust system.
At present, office automation is becoming more and more popular. Many offices have a large number of office equipment such as computers, laser printers (including copiers) and fax machines. Some of them will produce ozone and odor during work. With the enhancement of people's awareness of environmental protection, office workers are paying more and more attention to whether the odor produced by laser printers (including copiers) equipment, including ozone, will affect health.
It is well known that commercial ozone is mainly produced by UV lamps and corona. Today we will talk about the application and disadvantages of corona treatment.The role of corona treatment in printing：Corona treatment is destroying the molecular structure of the substrate （such as plastic film ）by corona discharge. The surface is oxidized and polarized in minutes, and the ion shock erodes the surface, so as to increase the adhesion of the substrate surface. Finally, the printing ink can be well attached to the surface of the substrate.
UL 1046 is the standard by which Grease Extractors are tested.Products covered by these requirements are single-stage and multi-stage grease filters. These grease filters are intended for installation and use in accordance with the Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, NFPA No. 96 and the International Mechanical Code (IMC).
Ozone (O3) is a strong oxidizing catalyst, a light blue gas with a fishy smell, which is heavier than air and will decompose into oxygen in certain temperature as time goes on. When the human inhales ozone, the mucous membrane of the respiratory tract will be stimulated and hurt. The extent of injury depends on the inspired concentration and the respiratory time .
What is the material of the ozone decomposition filter? What's black on the screen, activated carbon or some other catalyst?Regarding the material of the ozone filter，Classification by substrate:
● Aluminum honeycomb, the activated carbon containing the catalyst, evenly coated on the surface of aluminum honeycomb...