What are the principles for selecting air filters?

Reasonably select the appropriate air filter based on the specific situation, and the selection principles are as follows:

1. Determine the efficiency of the final level air filter according to the indoor cleaning and purification standards required, and reasonably select the combination number of air filters and the efficiency of each level. If general purification is required indoors, initial efficiency filters can be used; If moderate purification is required indoors, two-stage filters with initial and intermediate efficiency should be used; If ultra clean purification is required indoors, primary, medium, and high efficiency three-stage purification filtration should be used, and the efficiency of each level of filter should be reasonably and properly matched. If the efficiency difference between adjacent two levels of filters is too large, the previous level of filter cannot protect the subsequent level of filter.

2. Correctly measure the dust content and particle characteristics of outdoor air. Because filters filter and purify outdoor air before sending it indoors, the dust content of outdoor air is a very important data. Especially in multi-stage purification and filtration treatment, when selecting a pre filter, it is necessary to comprehensively consider factors such as the operating environment, spare parts costs, operating energy consumption, maintenance, and supply before deciding.

3. Properly determine filter characteristics. The main characteristics of filters are filtration efficiency, resistance, penetration rate, dust capacity, filtration wind speed, and processing air volume. If conditions permit, high-efficiency, low resistance, large dust capacity, moderate filtering wind speed, large processing air volume, convenient manufacturing and installation, and low price filters should be selected as much as possible. This is an economic analysis that comprehensively considers one-time investment, secondary investment, and energy efficiency ratio when selecting air filters.

4. Analyze the properties of dusty gases. The properties of dusty gases related to the selection of air filters mainly include temperature, humidity, acid and alkali content, and the amount of organic solvents. Because some filters allow use at high temperatures, while others can only operate at room temperature and constant humidity, and the amount of acid, alkali, and organic solvents in dusty gases has an impact on the performance and efficiency of air filters.