Abstract
With the continuous development and application of new technologies and new products, Chemical plant reconstruction and expansion projects continue to increase. In addition, chemical production itself has flammable, explosive, toxic, harmful, corrosive and other characteristics, the potential risk factors increased, factory fires occur frequently. Therefore, in order to ensure the safety of life and property, a set of convenient automatic fire alarm system is designed for the workshop of chemical plant. Firstly, the system detects abnormal signals from three aspects of temperature sensing detector, smoke detector and photosensitive detector. The measuring signal is then transmitted to the PLC centralized control center via a transmitter, the controller makes a quick decision according to the preset program and sends out the corresponding control signal. If there is a fire, start the automatic fire extinguishing system and smoke exhaust system at the same time as the alarm, finally, the fire is nipped in the bud. The system uses one to many signal docking to facilitate the use of different places, and each detection area system has more than two different alarms to prevent false negatives and false positives. It is not only suitable for the use of a petrochemical factory, but also can be used in schools, warehouses, offices and other places.
