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Experiment Research On The Technology Of Ultrasonic Electromagnetic Composite Paraffin-Controlling For Crude Oil

Posted on:2011-11-11Degree:MasterType:Thesis
Country:ChinaCandidate:H ZhangFull Text:PDF
GTID:2131330338980239Subject:Machinery and electronics
Abstract/Summary:PDF Full Text Request
"Paraffin deposition"is a key problem on gathering and transportation of crude oil. Lots of methods used to paraffin-controlling are great in energy consumption, or high in cost, or need stoping well operations, or affect the physical properties of crude oil, and the effect is limited, can not eliminate the wax deposition fundamentally. Complex technology of ultrasound and magnetic was a new method of viscosity reduction. Ultrasound can change the shape of paraffin crystals, inhibit the growth of paraffin crystals, dispease paraffin crystal particles, and effectively reduce the viscosity of crude oil, lower energy consumption of transfering the crude oil withour pollution formation. Magnetic treatment was widely used in gathering and transporting crude oil because it is simple installation, easy to use, no pollution and low cost. This paper study of paraffin viscosity reducing effect of electromagnetic complex role of ultrasound by experiment.Based on analysis of the oil composition and paraffin deposition characteristics, analyse the paraffin-controlling mechanism of ultrasound and magnetic, discuss the paraffin-controlling mechanism of complex technology of ultrasound and magnetic.To improve the radiated power, using transducer array ultrasonic vibration system. Based on the design of piezoelectric transducers, test the performance of the transducer array using series inductance method to match the tuning. According to Huygens integral theorem, derived directivity function generated by circular piston transducer composed of a combination of plane linear arrayand and sound field and pressure distribution function, and numerical calculation was carried out, determine the the sound field effective range of transducer array, design experimental device to reduce viscosity of crude oil by ultrasonic, provid conditions for the next experiment.With viscosity-temperature curve, respectively analyse the paraffin-controlling effect of ultrasound, magnetic and complex technology of ultrasound and magnetic. Experimental study the affect to paraffin-controlling effect of ultrasonic processing time, the transducer current and the temperature, investigate the affect to paraffin-controlling effect of magnetic field strength and magnetic treatment time. After the orthogonal experiment, determine the effect level to the crude oil viscosity of each factor which include ultrasonic power, ultrasonic time, the magnetic field strength and the best parameters combination to reduce viscosity: transducer operating current is 0.2A, processing time is 3 min, magnetic field strength is 62mT, and find that the paraffin-controlling effect of complex technology is better than only one field, the subject also study the affect to paraffin-controlling effect of the paraffin content in crude oil.
Keywords/Search Tags:Crude oil, transound-based on paraffin-controlling, paraffin-controlling using the magnetic treatment, Transducers array, Complex technology on paraffin-controlling
PDF Full Text Request
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