Circulating disinfection method of air conditioning system
Through the operation of the fan of the air conditioning system, the disinfectant is connected to the return air main pipe of the air conditioning system, and the whole air conditioning system performs disinfection and sterilization services in a closed cycle. After disinfection, the air conditioning system exhausts air and air conditioning disinfection gas. Through circulating disinfection, the whole air-conditioning system has been purified, that is, the air-conditioning unit, the air supply/return duct of the air-conditioning system, the corresponding tuyere and the corresponding air-conditioning system room.
At present, the commonly used disinfection services in pharmaceutical factories include ozone, formaldehyde, vaporized hydrogen peroxide and sporicide (for wiping).
Ozone is a light blue gas at room temperature and has a special smell. Ozone destroys the microbial membrane structure through the oxidation of oxygen atoms, thus achieving the purpose of sterilization. Ozone is widely used for disinfection of air-conditioning systems in pharmaceutical factories because of its easy availability, relatively low corrosiveness to contact substances, natural degradation to oxygen and little harm to people. But ozone is a strong oxidant and extremely unstable. It will decompose itself into oxygen at room temperature and will also decompose during air conditioning pipeline transportation. When it arrives indoors, it often fails to reach the disinfection concentration.
Formaldehyde (CH2O) is a colorless gas with a special pungent smell, which will irritate people's eyes and nose. Formaldehyde is adopted by some pharmaceutical companies because of its good bactericidal effect, non-corrosive to the substances in contact and low price. However, due to the carcinogenicity of formaldehyde, it is difficult to completely remove it. Formaldehyde is crystallized in the high-efficiency filter after condensation, and the inevitable air leakage in the air duct makes it difficult to completely remove the formaldehyde in the workshop interlayer, and there is a risk of secondary pollution. 2017101On October 27th, the International Agency for Research on Cancer of the World Health Organization published a preliminary list of carcinogens. Formaldehyde is classified as a 1 carcinogen and gradually abandoned by pharmaceutical companies.
Sporicide is a colorless and odorless liquid, and its active ingredients are hydrogen peroxide and silver stabilizer. It is mainly used for disinfection and sterilization of clean room surfaces and equipment, which can be achieved by wiping clean room surfaces and equipment surfaces, and is not suitable for circulating sterilization of air conditioning systems.
Disinfection of vaporized hydrogen peroxide air conditioning pipeline
Compared with formaldehyde, the disinfection residue of vaporized hydrogen peroxide can be naturally degraded into water and oxygen, which is harmless to people and has good compatibility with stainless steel metal materials. At present, it has been accepted by some domestic pharmaceutical companies and gradually promoted. Moreover, the low concentration of gaseous hydrogen peroxide has higher sporicidal ability than liquid hydrogen peroxide, and its main principle is to generate free hydroxyl groups by vaporization, which can be used to attack cell components, including lipids, protein and DNA.
Shanghai Fantong Biological Disinfection Service has been committed to environmental disinfection in clean areas of pharmaceutical factories and laboratories, and its vaporized hydrogen peroxide disinfection technology has accumulated very rich experience and service cases in disinfection and sterilization of air conditioning systems in pharmaceutical manufacturing enterprises. Kino, a vaporized hydrogen peroxide disinfection robot developed by the company, is used to disinfect air-conditioning pipelines. Gas molecules have strong diffusibility and can quickly spread to the whole air-conditioning pipeline, providing circulating disinfection services for the whole air-conditioning system, thus ensuring disinfection concentration and time. Kino vaporized hydrogen peroxide has broad-spectrum bactericidal effect, which can effectively kill bacteria, fungi and viruses in pipelines, especially molds and bacterial spores. The residue is completely degraded into water and oxygen without residue, which provides a healthy and clean air environment for the pharmaceutical production workshop.
Kino has built-in wifi and intelligent Internet of Things, which can be controlled by computer or remotely. The operation is flexible, the disinfection situation can be monitored in real time, the disinfection service effect can be ensured, and the 6-log microorganism killing can be realized by using biochemical indicators to verify the space and surface during the purification process. The whole purification can be completed within 24 hours, and then production activities can be quickly resumed. At present, kino is widely used in medical industry, pharmaceutical industry, animal laboratory, school kindergarten, food industry and other microbial disinfection services!