There is given a common method of calculation of power consumptions for emulsification at systems liquid-liquid in low volume mixing devices (rotary pulsating apparatuses and rotor-disc mixers) in this Article. Named mixing devices shown a high efficiency at processing of liquid-liquid systems and are widely used at chemical processes. It is shown that at determination of energy consumptions it is need to take in account energy dissipation processes, caused by viscous friction forces, which affect a significant influence at high gradients of speeds turbulent motion. It is obtained the ratio, which connects an angular velocity of rotor rotation of mixing device and a characteristic size of dispersed phase particles of a mixing device. There are given an experimental equations of consumed power of rotor-disc mixers on rotor rotations number and characteristic sizes of dispersed particles for th system water and diesel fuel. Also it is known that in decrease of dispersed particles size and in increase of volume consumption of the processed mixture, the consumed power is increase, and it due to the fact by increase energy consumption for creation of interphase surface.
The article considers the study of Polyvinylchloride film properties and their change on exposure to microwave radiation with relatively low doses of energy. The work relevance is caused by wide application of products on PVC basis and their good interaction with electromagnetic radiation. The experiments have shown the improvement of operational properties at energy doses from 10 to 30 kJ / kg. The proposed method is more environmentally friendly, energy efficient compared with traditional methods of improving the polyvinylchloride film properties.
There is given view of construction of one-step rotor-disc mixer and described work principle in this Thesis. Also given a view of additional elements construction, arranged on working bodies (discs). It is proved experimentally, that making of slots on additional work bodies (teeth) in comparison with solid additional working elements results to significant increase quality of the mixture and performance of the device. It is determined, that to create of the emulsion with certain of dispersed particles the apparatus with modified additional working elements consumes less specific power, this is due to the fact that the working medium passes through the slots, thereby creating additional highly turbulent flows, the directions of which intersect, creating zones of sharp increase and decrease in pressure, which has a positive effect on the emulsification process. In addition specific power consumption of the device with modified additional elements is less than the specific power of the device with solid additional elements, what indicates more highly energy efficiency of supposed construction of rotor-disc mixer. Also given results of experimental research, which certifies theoretical view fully.
There is given in this thesis a general method of calculation of power consumption for emulgation in systems liquid-liquid in small-size mixing devices (rotor-pulsation apparatuses and rotor-disc mixers). This mixing devices, have shown a high efficiency at processing of liquid-liquid systems and are wide using chemical processes. The base of calculation method is an energy ratio to describe of developed turbulent motion, pulsation intensity of which is enough for create of dispersed particles of given size and concentration, which provide a necessary surface of phases contact. It is shown, that in determination of energy consumption it is need to take in account energy dissipation processes, due to viscous friction forces, which have a significant influence at high gradients of turbulent motion. There is obtained a ratio, which connects an angular velocity of rotor rotation of mixing device and a characterized size of dispersed phase particles.There is given an experimental dependencies of consumed power of rotor-disc mixers on rotor rotations number of mixing device and characterized sizes of dispersed particles for systems water-diesel fuel. It was determined, that are decreasing of dispersed particles sizes and in increasing of volumetric flow of processing mixture a value of consumed power increases, and it is related with by increase of energy consumption for creating of interphase surface. It was determined, that a power, consumed by rotor-disc mixer, for emulsion making with averaged dispersion size of particles at range 5-25 mkm, increases by increase of rotation numbers ~n0.37. Comparison of theoretical equations and experimental data have shown adequacy of supposed calculation method of energy consumption.
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