Research On The Automatic Fire-extinguishing Of The Water Mist System In Ship's Engine Room

Many countries in the world are dedicated to research into new fire protection technologies. Water mist fire extinguishing system has features of high efficiency and it constitutes no hazard to the environment, which represents a development trend of fire protection technology. It is a potential substitute for halon agents, and has become a hot topic of international research on fire protection. According to the SOLAS Convention, the fixed water-base local fire fighting system is added, so to the ship, it becomes a necessary for the modern ship to be equipped with the water mist fire extinguishing system. Because the application of the marine water mist fire extinguishing system in our country CO₂ started late, the domestic equipment in ships take up a small proportion, but the research in this field abroad has tended imperfects the research and developing our own ship's water mist fire extinguishing system has become the most urgent task. This paper focuses on engine room the fixed local water mist fire extinguishing system in the engine room of DMU's new training vessel Yukun. This paper studies the design of the fire fighting system for the main engine and other protection fields, and it will be very valuable and meaningful in promoting the application of technology in China.Firstly, the outline of the water mist fire extinguishing system's development and its current research background are introduced in this thesis. Emphases are put on the overview about the extinguishing mechanisms, technical characteristics and engineering applications of the system. Secondly, based on atomization law, extinguishing mechanism of water mist and the component of water mist fire extinguishing system, marine pump local water mist fire extinguishing system is developed. The principle of work, main technical parameter and movement process of water mist is expatiated in the thesis. Choose the hardware of the control system according to the composing principal, control flow of the pump mid pressure local water mist fire extinguishing system. Then design and realize the system program using PLC. Finally, to realize the monitor warning and visualization super ordination machine monitors display system better. Mainly introduces the interface design and program code realize of the alarm synthetically display system and the communication between the bet off place machineand the PLC.