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Clean ventilation and purification solutions to improve laboratory air quality
Clean ventilation and purification solutions to improve laboratory air qualityThe ventilation and purification system of clean laboratories is an important point that cannot be ignored in laboratory projects. To ensure the accuracy of laboratory test data, some factors unrelated to the experiment should be excluded as much as possible. However, to achieve high-quality ventilation and purification effects in clean laboratories, appropriate solutions need to be adopted. This article will introduce several common clean laboratory ventilation and purification system solutions to help you understand how to improve the air quality and work efficiency of the laboratory.First, when experimenters go from non-clean areas or areas with a lower clean level to higher-level clean regions, they need a buffer device, and the air shower room should be the best choice. It uses high-speed airflow to blow off and remove particles attached to human clothing or the surface of materials. Prevent workers from bringing hair, dust, and bacteria into the laboratory, meet the strict dust-free purification standards at the work site, and produce high-quality products. Secondly, the laboratory ventilation and purification system solution generally includes the composition structure of the purification equipment and its detailed use. The ventilation and purification system of the clean laboratory has certain standards and requirements. Apart from equipment factors, from the perspective of system design, the design of laboratory ventilation and air conditioning systems should consider the following main factors: (1) Ensure laboratory safety and a certain number of ventilation times; (2) Solve the negative pressure design and system control of laboratory ventilation systems; (3) Control energy consumption when the ventilation frequency and fresh air are sufficient; (4) The system is stable and reliable. In addition, the following aspects should generally be considered when selecting ventilation equipment: (1) The ventilation design of the laboratory should meet the air exchange frequency of 20 to 30 times per hour, and the ventilation volume should be calculated based on the maximum open area of the fume hood. In actual use, the fume hood is usually not fully opened, so it is necessary to check the ventilation volume and replacement frequency at the minimum opening area. If it is insufficient, the capacity of the exhaust system should be increased. (2) The laboratory adopts a fresh air system, and the exhaust is not circulated. The fresh air volume is 70% to 80% of the exhaust volume, and the rest is sent to the auxiliary area. The fume hood can be equipped with a fixed air volume or an adjustable air volume control system to maintain a constant wind speed and negative pressure balance. (3) The adjustable air volume system is energy-saving and suitable for laboratories with large changes in ventilation frequency. If the maximum and minimum ventilation frequencies are close, a fixed air volume system can be considered to simplify the design and reduce investment costs. Finally, regular maintenance and cleaning are inevitable. It is difficult for us to accurately control environmental factors, and an error range must be allowed. Regular inspection and maintenance, timely replacement of filters, and cleaning of air ducts and exhaust equipment to ensure the stability and reliability of the system are all measures to reduce the error range. |
