1. Determine the laboratory type and level: different types of laboratories need different ventilation systems. For example, chemical laboratories and biological laboratories need different ventilation systems because of their different safety and hygiene standards. When determining the type and level of the laboratory, it is necessary to consider the experimental contents involved in the laboratory, the chemicals or biological products used and the possible dangerous substances.
2. Determine the ventilation type: Determine what type of ventilation system is needed, such as negative pressure ventilation, positive pressure ventilation and mixed ventilation. This will depend on the design and use of the laboratory. Negative pressure ventilation is suitable for laboratories that produce harmful gases or vapors, and can effectively discharge harmful substances outdoors; Positive pressure ventilation is suitable for laboratories that require to keep indoor air clean, which can prevent external pollutants from entering the room; Mixed ventilation combines the characteristics of negative pressure ventilation and positive pressure ventilation, and is suitable for some laboratories with special needs.
3. Determine the ventilation: calculate the ventilation required by the laboratory. The calculation of ventilation needs to consider factors such as laboratory area, number of staff, laboratory type, safety standard and building code. Ventilation directly affects the speed and quality of air flow in the laboratory, so accurate calculation and evaluation are needed.
4. Determine the exhaust mode: the exhaust system can be unidirectional or multidirectional. In the one-way exhaust system, air can only enter and leave the laboratory from one direction. In the multi-directional exhaust system, air can enter and leave the laboratory from many directions. According to the design and use of the laboratory, choose the most suitable ventilation mode. One-way exhaust is suitable for laboratories that need to discharge harmful substances quickly, and multi-way exhaust is suitable for laboratories that need to keep indoor air circulation.
5. Design exhaust duct: The exhaust system includes exhaust duct and fan. When designing the exhaust pipeline, the location of the exhaust port, the size, material and layout of the pipeline should be considered. The selection of fan should be based on the amount and pressure of air to be discharged. The design of exhaust duct should consider the layout and equipment layout in the laboratory to ensure the smooth air flow and avoid the occurrence of dead corners or the accumulation of harmful substances.
6. Selection of waste gas treatment equipment: The discharged air may contain harmful substances, so it is necessary to install waste gas treatment equipment in the exhaust system. According to the laboratory safety standards, choose the appropriate waste gas treatment equipment. Exhaust gas treatment equipment may include filters, adsorbents, catalysts, etc. Used to remove or reduce the content of harmful substances and ensure that the discharged air quality meets the standards.
7. Installation of exhaust system: In the process of laboratory construction, the exhaust system is installed according to the design scheme. Ensure the correct installation and operation of the system. During installation, attention should be paid to the connection and sealing of pipelines, as well as the installation position and fixing method of fans and waste gas treatment equipment. After the installation, the system needs to be debugged and tested to ensure its normal operation and achieve the expected results.
In order to meet the needs of laboratory ventilation, Big Oak Group actively invested in the planning and design of ventilation system. In the field of laboratory ventilation design, Big Oak Group, which has 15 years of experience in laboratory project construction industry and dozens of professional engineers in various fields, provides a guarantee for building a safe, scientific, reasonable and comfortable laboratory ventilation system.