The solution is as follows:
1. Air purification treatment for each level of air cleanliness in a dust-free purification project should utilize three stages of filtration: primary, intermediate, and HEPA filters. The layout and installation of air filters should comply with the following: Primary air filters should not use oil-impregnated filters; intermediate air filters should be centrally located in the positive pressure section of the clean air conditioning system; HEPA filters should be located at the end of the clean air conditioning system. HEPA installation should be simple and reliable, facilitating leak detection and replacement; intermediate and HEPA filters should be selected based on the rated air volume; and HEPA filters with similar resistance and efficiency should be installed in the same cleanroom.
2. When deciding whether to use a centralized or decentralized clean air conditioning system, comprehensive consideration should be given to factors such as the production process characteristics, the cleanroom air cleanliness level, area, and location. If the production process is continuous and the cleanroom or cleanroom area is large, a centralized clean air conditioning system should be used, with strict requirements for centralized location, noise control, and vibration control.
3. If the clean air conditioning system requires electric heating, a tubular electric heater should be selected, located upwind of the HEPA filter, and fire prevention measures should be implemented.
4. In addition to the DC system and duty fan system, the clean air conditioning system in the purification project should also implement anti-infiltration measures to prevent outdoor polluted air from entering the cleanroom through the fresh air vents.
5. The clean air conditioning system should be designed to rationally utilize return air. Return air should not be used if the process generates a large amount of harmful substances, local treatment cannot meet hygienic requirements, or is harmful to other processes.
