Research & Manufacture On Automatic Single-fluid High-press Ure Water Mist Fire Suppression System And Monitoring On Temperature Of Fire Scene

Fire brings tremendous damage to human. Water is the material most in use to put out a fire, but ordinary mode of water spray fire suppression has lowly efficiency, many quantities of water requirements and secondary damage of water. Technology of water mist fire suppression has advantages of high fire extinguishing capability, minimum quantity of water requirements, better effect, no pollution and extensive application scope. Since the signature of "Montreal Protocol", Water mist fire suppression system has been in fact widely expected the most potential substitute of the Chlorine- or bromine-based gaseous fire suppressants known as HALON, which has great affection to the ozone layer. Water hydraulics has advantages of environmental-friendly, non-flammable, cleanness, safety, readily available, inexpensive, and easily disposable. It is widely recognized that water hydraulics is a frontier research area and the hotspot of hydraulics research and design. It has wide application and development potential. This thesis brings forward stationary single-fluid high-pressure water mist fire suppression system which applied with water hydraulics technology, and research on it. The main contents of this thesis are as follows.In chapter 1, survey of current technical status, development trend and application status of water mist fire suppression and water hydraulics technologies. Discuss the significance of research and manufacture on stationary single-fluid high-pressure water mist fire suppression system which applied with water hydraulics technology. Base on this, the contents of the thesis are put forward.In chapter 2, the mechanism of high-pressure direct atomization is researched. Analyze on main factors of influencing nozzle atomization character and their influences to atomization. And point out some requisition of selecting spray nozzle. Reach conclusions that atomization is better when nozzle adds rotor and the single-fluid high-pressure water mist fire suppression system should use nozzles with rotor.In chapter 3, stationary single-fluid high-pressure water mist fire suppression system is designed and experimented with A type and B type fire protection standards. Experiments prove that this stationary fire suppression system has corking effect to put out small and medium fire as 1A,1B and 2B types, and it's quantity ofABSTRACTwater requirements is less than ordinary water spray fire suppression system.In chapter 4, automatic control subsystem of stationary single-fluid high-pressure water mist fire suppression system and temperature monitor system of fire scene are designed. And through analyzing temperature curves of fire scene of suppressing 1B, conclude the general rule of temperature variety in fire scene when fire is suppressed by water mist.In chapter 5, a brief summary on research work of this thesis is provided, and some conclusions are drawn. Also some researches that need to do by next step are analyzed.