Study On The Atomizing And Humidifying Character Of The Centrifugal Nozzle With Firing Pin Type, High Pressure And Little Aperture

This' paper mainly researches on the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture. Its atomized parcel is so small that no drip is separated out. This kind of centrifugal nozzle has high humidifying efficiency and low energy cost, which could be used in many situations in textile factories such as directly humidifying in workshop and humidifying in air pipeline. However, the related research is rarely reported on the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture.Based on the theory analysis and experiment work, the paper studies the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture. Compared with the traditional air washer, the high efficiency and energy saving character of this kind of nozzle is stood out.As to the work about theory analysis, at first, the paper describes the atomizing and humidifying process of the centrifugal nozzle with firing pin type, high pressure and little aperture and liquid physical properties. Later, combining with the structure characters of this kind of nozzle, the paper studies on the theory of the atomizing and humidifying process by three phases, which is water film forming phase, water film falling into pieces phase, and heat and mass transfer between water and air phase in turn. Through the special studies on impacts to atomizing and humidifying effect from such factors as the firing pin type, centrifugal structure, higher spraying pressure, less aperture, initial water temperature and original stateof the air, some conclusions are obtained, such as:The centrifugal nozzle with firing pin type, high pressure and little aperture has bigger air eddy and atomizing angle. The spaying liquid has high velocity. The droplet is small, and the heat and mass transfer velocity is high. The pin type structure enhances the atomizing and humidifying efficiency. The high pressure and little aperture provide bigger flux and energy for atomizing and humidifying. Furthermore, the higher initial water temperature will decrease viscidity and surface tension. So, the humidifying effect is improved.As to the work about experiment study, at first, the paper makes certain the prominent affecting factors to the automating and humidifying property of this kind of nozzle by orthogonal experiment. By Jicha analysis method and Fangcha analysis method, the paper got that the nozzle aperture, the initial water temperature and the spraying pressure have prominent effect to the humidifying property while the effect of the original air state is small.Later, the paper ascertains how the prominent factors influence the humidifying effect by single factor experiment and got such solutions: When other situations don't change, the nozzle flux will enhance with the increase of the nozzle aperture and spraying pressure. Air's changing quantity of enthalpy and absolute humid, valid humidified quantity, humidifying efficiency and saturation efficiency will enhance with the increase of the initial water temperature. With the enhance of the praying pressure, the valid humidified quantity and air's changing quantity of enthalpy will increase first and decrease later, while the humidifying efficiency will drop. When the water-air ratio increases, air's changing quantity of enthalpy and absolute humid will be enhanced. At last, the paper analyses the data from single factor experiment by mathematics method and gets relationship formulas about the nozzle flux, valid humidifying quantity and air's enthalpy changing quantity.Integrated the work on theory and experiment, the paper provides technical performance material at large about the automating and humidifying character of the centrifugal nozzle with firing pin type, high pressure and little aperture to the manufacture and user. With the valuable reference during the selecting the equipment and ascertaining the parameters, the users could select and control the humid parameter...