Air cleaning technology solution reference (1)

With the development of science and technology, especially the development of military industry, aerospace, electronics, biomedicine and other industries, the development of clean technology at home and abroad continues to develop Modern industrial products and modern scientific experiments require miniaturization, precision, high purity, high quality and high reliability To produce these products, it is necessary to achieve the corresponding air cleanliness level of the controlled production environment It is self-evident that the high quality and high reliability of products are of great significance in the electronic information age Based on this trend, the development of clean technology has become one of the indispensable symbols of modern industrial production and scientific experiment activities Clean room design (including clean air conditioning design) is an important part of clean technology The control of pressure, temperature, humidity, air velocity and air cleanliness in clean workshop directly affects the production quality I technical scheme for pollution control of clean room the main task of air purification is to take air filtration technical measures to reduce the suspended granular or chemical molecular pollutants in the air of clean room to the allowable concentration according to the requirements of various product production processes, different processes and air cleanliness levels of various rooms The pollution sources in the clean room mainly come from four aspects: 1 Dust and bacteria in the air, dust particles and microorganisms brought by the fresh air in the purification air conditioning system; 2 Dust produced by the operators; 3 Dust produced by the building envelope and facilities, including the dust produced by walls, ceilings, floors and some bare pipelines; 4 Dust produced by the equipment and product production process In order to ensure the air cleanliness required by the product environment or clean rooms for other purposes, a variety of comprehensive technical measures should be taken to meet the requirements These comprehensive measures include: adopt the production process and equipment with less pollutants, or take necessary isolation and negative pressure measures to prevent the pollutants generated by the production process from spreading to the surrounding area, adopt the indoor decoration materials and appliances with less dust and not easy to breed microorganisms, reduce the pollutants brought into the room by personnel and materials, and maintain the production environment clean relative to the outdoor or air The environment with high degree requirements has a certain positive pressure to prevent the outdoor or adjacent room air carrying pollutants from entering through other gaps and holes through the doors and windows; strengthen the management of the clean room, clean and sterilize according to the regulations In addition to the above-mentioned technical measures, in order to control the indoor environment of the production environment or clean room for other purposes at the required air cleanliness level, the important technical measures are to send enough treated clean air to replace or dilute the polluted air generated in the normal operation of the room According to the requirements of different cleanliness levels of the room, the air purification treatment of the clean room is to send the treated clean air in different ways, and to discharge the corresponding amount of air contaminated with pollutants at the same time By such a dynamic balance, the indoor environment can be maintained at the required air cleanliness level At present, air filtration is the most important and widely used method in clean room The clean air sent to the clean room mainly depends on the air filter with different performance set at each part of the air supply system to remove the suspended particles and microorganisms in the air The following will introduce the relatively novel technical scheme in the field of clean room pollution control: (1) the traditional wet air treatment method of water spray room is used to deal with the chemical substances in the fresh air In recent years, many countries have carried out many studies to prove its effectiveness (2) HEPA filter with bactericidal effect (bactericidal enzyme filter) was used In the past, the toxicity of metal ions was used to kill bacteria For example, the silver type positive was higher than the air filter made of exchange fiber Now, the natural enzyme extracted from organism can be used to dissolve the cell wall of bacteria to achieve the purpose of sterilization It is a safe sterilization measure, which prevents the secondary pollution caused by the proliferation of microorganisms on the filter (3) UV photoelectron air purification method was used This method is different from ordinary electrostatic filter The method uses the photoelectric effect produced by ultraviolet irradiation on the metal film to generate electrons and negative ions in the air to charge the pollutants flowing through and collect them by the dust collector (Fig 1) At present, it has been used in limited small space (4) the desalting particle filter is used There is more salt in the air along the coast, and it will be higher under the strong wind such as typhoon This situation is extremely unfavorable for microelectronics factories Now there are two measures: 1) the filter material used is not easy to separate even after a large amount of salt is attached; 2) a water spray section and a water baffle are set at the entrance section of the air conditioning box, which can catch 90% of the sea salt particles first, and then remove the unclosed particles through the ordinary air filter Spray water should be directly discharged without recycling It should be considered in the air conditioning purification device for the microelectronics factory set up near the sea (5) adopt intelligent air ion purification system In recent years, an intelligent purification system has been developed in Europe, which uses the high-pressure ionization principle of the ion generating unit to release a stable positive and negative oxygen ion family The charged oxygen ion reacts with VOC substances, so as to achieve the purpose of removing odor and purifying air In order to ensure the indoor air quality in an ideal state, the system is also equipped with an intelligent control system, which transmits the detection data to the ionization controller through the wind speed, humidity and sensors on the air supply pipe, and the air quality sensors in the return air pipe and the fresh air pipe, so as to control the working intensity of the ion generating unit and automatically control the indoor air quality At the same time, these data are transmitted through the transmitter and the Network, which can be monitored remotely (6) adopt new air shower room After the traditional shower stops, the dust-containing air in the small room may be brought into the workshop The newly improved shower has the function of fast self purification When the shower stops, it can be partially converted into the top vertical air flow, which can quickly reduce the dust content in the small room and achieve the self purification effect Shanghai Sujing Industry Co., Ltd if you have any need, you can pass with us at any time Thank you very much for your support and look forward to cooperating with you Thank you & bestragard! 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