Clean room air filter selection and precautions
Clean room air filter selection and precautions
Air filter is the key equipment in purifying air-conditioning system. Generally, three-stage filtration of primary, medium and high efficiency is adopted. The key device is high-efficiency air filter; Dust particles, to protect the high efficiency filter, choose to filter...
Text label: clean room engineering, clean room design, air filter selection
Clean room air filter selection and precautions
Air filter is the key equipment in purifying air-conditioning system. Generally, three-stage filtration of primary, medium and high efficiency is adopted. The key device is high-efficiency air filter; Dust particles to protect the high-efficiency filter, the processing air volume of the filter should be less than or equal to the rated air volume; the medium-efficiency air filter should be centrally installed in the positive pressure section of the air-conditioning system, and the sub-high-efficiency and high-efficiency filters should be installed as end filters. At the end of the purification air-conditioning system, the resistance and efficiency of the high-efficiency air filter set in the same clean area should be similar; The air will not be polluted again due to leakage, prolong the service life of the high-efficiency filter, and arrange the high-efficiency filter at the end of the system, and require good installation quality to ensure that the clean air is no longer affected by the high-efficiency filter. The pipes on the leeward side are re-polluted, so that the air sent into the clean room can meet the clean requirements.
For the one-way flow clean room full of high-efficiency filters on the air supply surface, due to the large workload of high-efficiency filter installation and leak detection, in order to prolong the service life of the high-efficiency filter on the air supply surface and improve the indoor cleanliness , a high-efficiency or sub-high-efficiency filter can be added at the inlet of the air supply static pressure box or near the pipeline to make the air supply surface a semi-permanent device; many clean rooms are continuously operated for 24 hours, in order to facilitate management, easy sealing, and improve high efficiency The utilization rate of the filter, the high-efficiency filters are often set together, and the air distributor is arranged at each air outlet. For the filter with the same structure and the same filter material, when the final resistance is determined, the filter material area is increased by 50%, the service life of the filter is prolonged by 70%-80%, the filter material area is doubled, and the service life of the filter is It is about 3 times the original; it is economical for users to choose a filter with a large effective area. Of course, the possibility of increasing the effective filtering area should be considered according to the specific structure of the filter and site conditions. Increase the number of filter bags and the length of the filter bags. For the project in the design, you can choose the kind of filter that can accommodate more filter materials; in the design of the purification air conditioner, the efficiency of the last stage filter should be determined first according to the cleanliness requirements. Then choose a filter that plays a protective role. If this filter needs to be protected, add a filter on its upstream end. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and clean workshops.
For the terminal high-efficiency filter, the risk and indirect cost of replacing the filter will be very high, and the production of the filter must be stopped; After a period of trial operation, the service life of the terminal high-efficiency filter should be extended as much as possible.
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