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A Research on Crude Oil Electrical Desalting Equipment with Intelligent Response

Author: WangChengBin
Tutor: NiuJunBang
School: China University of Petroleum
Course: Materials Science and Engineering
Keywords: Electric desalting Scattered power Static mixing Voltage control Smart Response System
CLC: TE624.1
Type: Master's thesis
Year: 2011
Downloads: 68
Quote: 1
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Abstract


Due to the the mining conditions deteriorate and the constraints of the production process, the crude inevitable comprising water and salts. Crude salt refinery production is a huge risk: increased energy consumption; cause corrosion of the equipment, serious impact on production safety; increase the cost of production. Crude oil into the refinery by various unfavorable factors, and become more and more heavy, poor; refinery to improve the effectiveness of deep processing of crude oil needs, desalination equipment, the process is more demanding requirements; conventional apparatus can not meet these practical needs. Therefore this project is to begin developing a new type of electric desalting equipment. The authors first studied the high-voltage electric field on the role of the principle of the crude oil emulsion and electric desalting process, combined with the actual and experimental data analysis and study, found that a multi-stage desalination, desalinated water and the degree of mixing of the crude oil injected directly determine the desalination efficiency. Traditional mechanical mixing measures less efficient, can not meet the actual demand; based on electrical dispersion theory and electrical load response system in static mixing principle put forward their own desalination field adjustment programs. The design of this project desalination system is divided into three parts of the the intelligent response desalination power, transformers, desalination tank. Of intelligent response desalination power design: First, the research group in rectangular wave dehydration power accumulated technical advantages, the main circuit of the power supply design. Desalination power with both manual and automatic mode, automatic mode is designed specifically for the special needs of the desalination process, voltage control circuit design intelligent response control system. The system functions are: the MCU intelligent response to the request of the user to set parameters and control the D / A converter chip output analog control voltage; the control signal input to the feedback input of the PWM modulation chip TL494 IGBT module, which controls the voltage regulator circuit the duty cycle, in order to achieve the desalination farm was adjusted. In addition, the system microcontroller with external memory, parameter information is not lost when power is; SCM and PC data transfer via RS232 data interface; VC 6.0 programming language design, the preparation of the PC interface, convenient for the user Operation and control. The intelligent response module hardware and software debugging success, desalting and dewatering of laboratory tests. Experimental results show that: under specified conditions, off the indicators meet the design requirements; obvious mass transfer in the multi-stage desalination, desalination efficiency, the salt off rate of less than 5mg / L, good oil in the 3 mg / L In the following, fully meet the actual demand. Based on the same design principles, the design of electric desalting equipment on-site commissioning, field application shows that safe, reliable equipment operation; desalting and dewatering effect is good, all kinds of oil can guarantee off the moisture content of between 0.1 to 0.2%, with salt rate of less than 5mg / L; energy-saving effect is very significant, basically meet the requirements of on-site process, there is a good application prospects.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Crude oil pretreatment
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