According to the indoor requirements of clean purification standards, determine the efficiency of the last level of air filter, reasonable selection of the combination of air filter and the efficiency of all levels.
Such as indoor requirements of general purification, can use the primary filter; If the indoor requirements of medium purification, should use the initial and medium effect of two filters; If the indoor requirements of ultra-clean purification, should use the initial effect, medium effect and high efficiency three purification filtration, and should be reasonably and properly matched at all levels of filter efficiency, if the efficiency of the adjacent two levels of filter is too large, the former level of filter will not play a protective role on the next level of filter.
Correct determination of outdoor air dust content and dust characteristics. Because the filter is to filter and purify the outdoor air into the room, so the dust content of the outdoor air is a very important data. Especially in the multi-stage purification filtration treatment, the selection of pre-filter to the use of the environment, spare parts cost, operating energy consumption, maintenance and supply factors after comprehensive consideration of the decision. Determine filter characteristics correctly. The characteristics of the filter are mainly filtration efficiency, resistance, penetration rate, dust capacity, filtration wind speed and processing air volume. Under the condition of tolerance, the filter with high efficiency, low resistance, large dust capacity, moderate filtration wind speed, large processing air volume, convenient manufacturing and installation, and low price should be selected as far as possible.
This is the choice of air filters in the comprehensive consideration of one-time investment and secondary investment and energy efficiency of the economic analysis needs. The properties of dust-containing gas were analyzed.
The nature of the dust-containing gas related to the selection of air filters is mainly the temperature, humidity, the amount of acid, alkali and organic solvent. Because some filters are allowed to be used at high temperatures, while some filters can only work at room temperature and humidity, and the amount of acid, alkali and organic solvents in the dust-containing gas has an impact on the performance efficiency of the air filter.