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Indoor Environmental Quality - Chapter 12

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Làm sạch không khí thường được sử dụng trong hoạt động công nghiệp để giảm lượng khí thải của các hạt bụi cũng như các chất gây ô nhiễm ở dạng khí và hơi pha với môi trường xung quanh. Nó cũng được sử dụng như một biện pháp kiểm soát chất gây ô nhiễm trong môi trường trong nhà. Làm sạch không khí được sử dụng cả hai tổng quát và kiểm soát các vấn đề chất gây ô nhiễm cụ thể. Nó thường được sử dụng bởi các cá nhân trong một nỗ lực để giảm tiếp xúc. | chapter twelve Air cleaning Air cleaning is commonly used in industrial operations to reduce emissions of particulate dusts as well as gaseous and vapor-phase contaminants to the ambient atmosphere. It is also used as a contaminant control measure in indoor environments. Air cleaning is used both generically and to control specific contaminant problems. It is often used by individuals in an attempt to reduce exposure to allergens and other suspected indoor air contaminants. It is rarely used as a mitigation measure to resolve problem building complaints. In most applications air cleaning is a process in which airborne contaminants are removed from a moving airstream by some type of physical chemical or physical-chemical process. Less commonly air cleaning is attempted by introducing charged ions into indoor spaces or using oxidizing substances such as ozone O3 or passive systems such as plants. Though air cleaning systems may be used generically to improve overall cleanliness in indoor spaces and protect mechanical equipment in 1 heating cooling and ventilation HVAC systems in mechanically ventilated buildings and 2 residential heating and cooling systems air cleaners cannot as many lay individuals believe be universally applied for the control of all airborne contaminants. Most air cleaners have been designed to collect airborne particles and thus cannot control gas vapor-phase contaminants. However air cleaners can be designed to control specific gas vapor-phase substances or classes of substances or a combination of particle and gas vapor-phase contaminants. I. Airborne particles and dusts Most indoor spaces are sufficiently contaminated by airborne particles to warrant at least a minimum level of air cleaning. Particles may be generated indoors from a variety of activities and sources or enter indoor spaces from 2001 by CRC Press LLC the ambient atmosphere through HVAC systems or natural ventilation processes. Particles may include fabric lint and paper dust .