Research On The Diesel Oil Emulsification Action Under The Effect Of Power Ultrasound

The development of economy is close to energy source, but at present, the source is on short that would hinders the development of economy. So looking for compatible substitute energy source is quite necessary. As the main internal-combustion engine fuel, diesel oil take a great proportion of the consumption of energy source. Therefore, to get an alternative diesel oil is a primary method to solve the problem of source lack. It has been reported that combustion of emulsified diesel oil could save oil and reduce pollution markedly. So it is put on more and more important position. The diesel oil emulsion made by power ultrasound has good quality, and power ultrasound is widely used in emulsion field. But there is no theory research on effect of power ultrasound parameters on emulsion and the action mechanism. This research do great work on building ultrasound emulsified thermodynamics model which can give explanation of the experimental results, through seeing about the effect aspect of power density, process time and temperature, and so on.In term of fixed proportion to mix the surfactant span 80 (a lipophilic surfactant with HLB = 4.3) and tween 80 (a hydrophilic surfactant with HLB=15), then adding them into diesel oil and when the diesel oil is being dealt by ultrasound, adding water drop by drop.At constant power density, the mean size of emulsion drop reduces versus time until reach the critical size. Before the critical size arriving the distribution of droplet size is vary versus time and becomes uniformity. At constant duration, the larger density of power ultrasound, the time is shorter, and the critical size is smaller. Before critical size, the droplet distribution becomes uniformity as the power density increases. Temperature is one of the most important effect factors: comparing heat preservation and constant temperature conditions, the size of droplet under the former condition increases after critical size, but keep the same size for the latter condition.This research analyses the experimental result through thermodynamics methods and educes the energy distribution and the change in the system.