Clean room air purification project

Clean room air purification project

The purification process of clean clean room modular air can be divided into four stages: primary-efficiency filtration, medium-efficiency filtration, sub-high-efficiency filtration and high-efficiency filtration. The equipment required for each stage is primary-efficiency filter, medium-efficiency Filters and high-efficiency filters; primary filters are air purification...

Text label: clean room engineering, air purification engineering, design, construction and installation

Clean room air purification project

The purification process of clean room air can be divided into four stages: primary-efficiency filtration, medium-efficiency filtration, sub-high-efficiency filtration and high-efficiency filtration. The equipment required for each stage is primary-efficiency filter, medium-efficiency Filter and high-efficiency filter; the primary filter is the first-stage filter for air purification treatment, mainly filtering large particles of dust and various foreign objects, and the interception diameter is 10μm. The primary filter has plate type, folding type and bag type Because of the large gap and small resistance of the primary filter, a higher wind speed of 0.4-1.2m/s can be used for filtration. In order to facilitate cleaning, the filter material of the primary filter is generally made of coarse and medium-pore foam plastic or non-woven fabric. , According to the dust concentration of the fresh air at the inlet of the filter, it can be replaced and cleaned regularly to keep the filter resistance low and the air intake volume high.

The medium-efficiency air filter is divided into two types: bag type and non-bag type, among which the bag type includes F5, F6, F7, F8, F9, and the non-bag type includes FB, FS, FV; the medium-efficiency filter is mainly used for filtering Except for the particles with a diameter of 1-10μm, the filter media generally used are foamed plastics, glass fibers, synthetic fibers or non-woven fabrics with medium and fine pore sizes that can be washed. The air filtration speed is 0.2-0.4m/s, and the medium efficiency There are two main types of filter structures: wedge-shaped plate type and bag type. The medium-efficiency filter is often designed in the positive pressure section before the high-efficiency filter to prolong the service life of the high-efficiency filter. The sub-high-efficiency filter uses ultra-fine glass fiber filter paper or polypropylene filter paper as the filter material, and its structure is divided into separate, tubular and bag types; The room level is equal to or less than 100,000, and places with high requirements for environmental dust removal and sterilization are terminal filters for 300,000 clean workshops, which can be widely used in general filtration in electronics, pharmaceuticals, food and other industries. Can be used in high temperature places. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and purification workshops.

High-efficiency filters are mainly used to capture particulate dust below 0.5μm and various suspended solids, and can filter out 99.97% of 0.3μm dust particles. It is the terminal filter for purification workshops and local purification equipment. The end filtration of the system is made of ultra-fine glass fiber paper as filter paper, aluminum foil board and other materials to be folded as a dividing plate, sealed with a new type of polyurethane sealant, and made of galvanized plate, stainless steel plate, aluminum alloy profile as the outer frame, high-efficiency filter It is a non-renewable filter material, so a medium-efficiency or sub-high-efficiency filter must be installed before the high-efficiency filter for protection; high-efficiency filters generally use pleated filter components, in order to ensure filtration efficiency and provide sufficient air Adopt lower wind speed, keep wind speed at 0.01-0.03m/s, and larger filter area. The composition of the air purification system in the purification workshop includes air dust removal system, air disinfection system, airflow organization system and other units. The main equipment of the air purification project consists of induced draft fan, pre-filter, main filter, ozone, activated carbon filter, negative ion generator, etc. composition. In order to make full use of the exhaust air in the workshop from which particles and a large number of microorganisms have been removed, in the actual design, the return air is often transported to the fresh air pipeline according to a certain proportion to be mixed with the fresh air, and then passed through the medium-efficiency and high-efficiency filters. use, which saves energy and reduces production costs. After passing through the primary filter, the fresh air is sent by the fan through the dryer and the intermediate filter, and finally enters the workshop through the high-efficiency filter. The return air from the purification workshop returns to the air-conditioning box and is purified together with the fresh air to enter the workshop again for use. The dust collector is used to remove the particles in the vented exhaust gas, and the exhaust fan is used to adjust the return air ratio.

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