Rapid evaluation system and rapid evaluation method for electrostatic coalescence

Abstract

Disclosed are a rapid evaluation system and a rapid evaluation method for electrostatic coalescence. By the rapid evaluation system and the rapid evaluation method, coalescence effect of coaxially cylindrical electrostatic coalescers can be evaluated, and electric field parameters can be optimized. The rapid evaluation system comprises a power supply device, a small electrostatic coalescer and a measuring device. The power supply device refers to a waveform generator and a high-voltage current amplifier and is capable of applying high voltage to the small electrostatic coalescer to enable water drops in a water-in-oil emulsion to coalesce. An oscilloscope connected to the high-voltage current amplifier is capable of displaying voltages and currents between two electrodes in real time and collecting and storing the voltages and the currents for energy consumption ratio analysis. Changes before and after water drop grain diameter electrification are analyzed by combing microscopic photographing with an image processing technique, and water settling rate and separation effect can be analyzed by a gravity settling method, so that the optimal electric field parameters are determined. The rapid evaluation system and the rapid evaluation method have the advantages of convenience in use and rapidness in testing, the basis can be provided for design of the electrostatic coalescers and equipment selection, equipment design is more reasonable, and high efficiency in use is achieved.

Description

technical field [0001] The invention belongs to a fast evaluation system and method for electrostatic coalescence, which is used for evaluating the coalescence effect of a coaxial cylindrical electrostatic coalescer, optimizing electric field parameters such as electric field intensity, electric field frequency, and electric field waveform, and belongs to oil and gas The technical field of dehydration of oilfield produced fluid in gathering and transportation system. Background technique [0002] Oilfield produced fluids are seldom pure crude oil, and generally contain associated water and dissolved gas. The free water in crude oil can be separated quickly by sedimentation, but the water in the form of emulsion is difficult to separate. Therefore, after the three-phase separator, an electric dehydrator is usually required to treat the water-in-oil emulsion. The basic principle is to apply a high-strength electric field to the emulsion to increase the collision and aggregati...

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Problems solved by technology

However, this equipment also has certain defects, such as the presence of air between the outer electrode and the glass measuring cylinder, resulting in changes in the electric field; the tapered structure at the bottom of the measuring cylinder distorts the electric field and reduces the accuracy of the electric field; the high-voltage pulse generator can only output Pulse signal, waveform signal cannot be optimized

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