How to design a ventilation construction plan during the purification and decoration of the dust-free workshop?1
During the purification and decoration process of the clean room, in order to improve the use quality and effect of the clean room, reasonable design and construction measures to improve the ventilation project are usually used to deal with it. However, the design of ventilation needs to consider many issues. What are the specific ones? Let sz-pharma talk to you below: The design of the exhaust system of the clean room should take the following measures: anti-backflow measures; contain flammable, explosive Fire prevention and explosion-proof measures for material local exhaust system. Renovation of the enclosure structure: According to the requirements of the design specification for the construction plan of the clean workshop, in order to ensure the cleanliness of the space in the clean room, the enclosure structure of the clean room has been redesigned. Environmental requirements in clean room Cleanliness requirements: clean room: air cleanliness class 10,000; laminar flow hood: air cleanliness class 100. The pressure difference sequence of the rooms is: Room 1 > Room 2 > Room 3 > Corridor. Fresh air volume for personnel: In order to ensure the positive pressure in the clean area and according to the fresh air volume of indoor personnel, the fresh air is designed according to about 10% of the total circulating air volume (adjustable) and equipped with a primary filter. The fresh air volume meets the following requirements: The fresh air volume per person per hour in the clean room is not less than 40m3. Compensate indoor exhaust air volume + fresh air volume required to maintain positive indoor pressure. Usually the height of the old workshop is about 3m, and the area and shape are quite different from the actual needs. Generally, it is not possible to install air ducts, technical interlayers and special air-conditioning systems in accordance with the routine. According to the basic principles of air purification and the practice of previous construction, there is a practical method for technological transformation of purification workshops, which is especially suitable for the technological transformation of small and medium-sized purification workshops. The schematic diagram of using ordinary air conditioners to directly send cold air to the air mainstream area to transform the clean room. The clean room is built in the old factory building, and the room height is 3m. The top of the dust pharmaceutical cleanroom is a fan room with a height of about 0.6m, which is equipped with a fan box. Under normal circumstances, the blower of the ordinary air conditioner can send the cold air to 15m away, which can basically meet the use of the general small and medium-sized clean room. When the air supply distance is long, a fan can be installed on the cold air duct to increase the air supply pressure. It must be noted that the shroud and the cold air duct must be insulated. The thickness of the indoor unit of the ordinary cabinet split air conditioner is generally 0.25m~0.35m. Considering the width of the shroud, the minimum width of the return air channel can be made 0.5m~0.7m. When a wall-mounted air conditioner is selected, the width of the return air passage can be reduced, and the width of the remaining return air passages can be made at least 0.1m. In this way, the design of the clean room can maximize the use of the building space.
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