A centrifugal or axis flow can be used (the requirements for continuous work for 30 minutes when you meet 280 ° C), and the fire -exhaust fire prevention valve that can be automatically closed should be set at the entrance of the smoke, and the smoke discharge is locked.The smoke drainage should be set at the top of the smoke exhaust system. The export of smoke should be facing up, and the air inlet of the pressure is higher. The vertical distance between the two should not be less than 3m or the horizontal distance should not be less than 10m.When a row of tobacco or smoke discharge valves in the system opens, the smoke drain should be started by itself.
1. The smoke exhaust fan should be set in a dedicated fan room or on the outdoor roof. The fan room should be separated from the wall with a refractory limit of not less than 2.0h and the 1.5h floor and Grade A fire door separated from other parts.When the conditions are limited, it can be set in a dedicated space. The surrounding structure around the space shall adopt a non -combustion body with a refractory limit of not less than 1.0h, and there should be space of more than 600mm on both sides of the fan.When the machine room must be used with other fan, the following conditions should be met:
1) There should be an automatic water spray fire extinguishing system in the computer room;
2) Fans and pipes used for stressing air supply in the machine room;
3) Soft -take -offs shall be set up on the smoke exhaust fan and smoke exhaust pipes.
2. The smoke exhaust pipeline must be made of non -combustible materials. When a metal pipe is used, the wind speed in the pipeline should not be greater than 20m/s; when a smooth concrete pipeline such as smooth concrete is used in the inner surface, it should not be greater than 15m/s.When there is a combustible material in the ceiling, the smoke exhaust pipes in the ceiling should be insulated by non -combustible materials, and it should be kept at a distance of no less than 150mm from the combustible material.
3. When the fire is confirmed, the smoke exhaust port or automatic smoke exhaust valve in the same row of smoke system should be opened, and the smoke discharge valve or smoke exhaust port in other tobacco prevention partitions should be closed.
4. The smoke exhaust system should be separated from the ventilation and air regulation system.When combined, the following conditions should be met:
1) The air outlet, air duct, fan, etc. of the system should meet the requirements of the smoke exhaust system;
2) When the fire is confirmed, it should be able to open the smoke exhaust port and smoke exhaust fan in the smoke discharge area, and automatically close the ventilation and air -conditioning system that is not related to smoke discharge within 15s.
5. Tobacco discharge well roads should be separated from adjacent areas with a refractory limit of not less than 1h; when the door must be set on the wall, the Class C fire door should be used; when the horizontal smoke exhaust pipes cross the firewall, there should be a smoke discharge fire prevention fire prevention fire and fire prevention.Valve; when crossing two or more fireproof partitions or smoke exhaust pipes in the ceiling of the aisle, the refractory limit of its pipeline should not be less than 1h;When crossing, its refractory limit should not be less than 2h.
6. The setting of the exhaust port shall meet the following requirements:
1) The exhaust port shall be located in the storage cigarette warehouse;
2) Licensed the fire outlet or automatic smoke discharge valve in the smoke discharge area by the fire automatic alarm device during the fire, and a manual opening device was set at the scene;
3) The setting of the exhaust port should make the direction of the smoke flow opposite the direction of the evacuation of the personnel. The distance between the tobacco outlet and the safe export should not be less than 1.5m (try to stay away from the safe exit);
4) The wind speed of the exhaust port should not be greater than 10m/s.
7. When using the ceiling space for indirect smoke, the closed ceiling is flattened on the cervical flue gas at the entrance set on the top of the flue gas flow.When the mouth is located in the grille ceiling, the opening rate of the ceiling should not be less than 25%of the net area of ??the ceiling.
The above is the standard for the installation and installation of the anti -smoke fan. For more relevant information, please follow us.