静电聚结脱水装置电源系统启动特性

Startup characteristics of power system of the electrostatic coalescer dewatering device

静电聚结器的脱水效果与能耗均优于传统电脱水器,然而其电源系统的强烈波动会对生产运行造成一定影响。为确定引起电源系统信号波动的主要因素,研究不同因素对电信号的影响规律,结合静电聚结理论和RLC电路基本规律,以内置式静电聚结器与电信号测试装置为基础,开展电源系统启动特性实验研究。采用双层绝缘电极板,改变电压、流量及含水率,研究电信号的波动特性。结果表明:流量和乳状液含水率对电信号波动幅度的影响较大,且含水率越高、流量越大,启动时电流波动幅度越大。通过改变启动方式,可以减小启动电流波动幅度,从而提高聚结器稳定运行性能。

The electrostatic coalescer is superior to traditional electric dehydrator in terms of both dewatering effect and energy consumption, but the strong fluctuation of its power system may have certain impacts on its operation. To determine the main factors for the power system signal fluctuation and their influences on the electrical signals, this paper presents an experimental study on startup characteristics of the power system of built-in electrostatic coalesce and electrical test equipment, based on the electrostatic coalescer theory and the basic law of RLC circuit. Moreover, the double-insulated electrode plates are used to change the voltage, flowrate and water content, so as to identify the fluctuation characteristics of electric signals. The results show that the flowrate and water content of the emulsion have higher impacts on electric signal fluctuation- the higher the water content and the greater the flowrate, more severely the current fluctuates at startup. By changing the startup method, the current fluctuation can be mitigated to improve the stability of the coalescer.