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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.5 pt.A; 20050606-09; Reno-Tahoe,NV(US) >Identification and Clean-Up of Contaminants from Vaporized NGL CGT Fuel
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Identification and Clean-Up of Contaminants from Vaporized NGL CGT Fuel

机译：鉴定和清除汽化NGL CGT燃料中的污染物

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摘要

This paper describes an analytical approach used to identify heavy natural gas liquid (NGL) fuel components and fuel conditioning solutions employed to prevent fouling of the vaporized fuel delivery systems. The discussion includes high pressure vaporized fuel sampling, isolation of C7+ and C14+ hydrocarbon fractions from NGL, and performance validation of fuel processing apparatus. Saudi Aramco operates more than 80 aeroderivative gas turbines (CGT's), from four manufacturers, to drive crude oil pumps and generate electrical power on the East-West Pipeline that traverses the Arabian Peninsula. Since the pipeline was first commissioned in 1980, the CGT's have been operated primarily on vaporized C2+ NGL. Although the properties of this C2+ NGL (such as density and heating value) are nearly identical to propane, its use as CGT fuel has presented challenges. Fuel system fouling resulted from the presence of heavy hydrocarbons including residual surface-active compounds derived primarily from corrosion inhibitors and intermittent crude oil carryover. This fouling consisted of hard, epoxy-like deposits coating all manifolds and fuel nozzle passages downstream of the vaporizers. The entire fleet suffered from increased operating and maintenance costs and reduced reliability from plugging of last-chance filters to blocked fuel nozzles. This led to temperature spreads in combustors and hot component damage. High temperature rated coalescing filters were applied successfully in three vaporized NGL fuel system configurations. One fuel system configuration that required even more stringent fuel conditioning was modified to reject approximately 15 percent (heavy ends fraction) of the NGL. Performance tests were conducted to measure the extent to which heavy ends were reduced in the modified fuel vaporizers. Analytical methods were developed to identify and measure heavy hydrocarbons at ppm concentrations. The actual fuel compositions determined analytically agreed with compositions predicted from process simulations.
机译：本文介绍了一种用于识别重天然气液体（NGL）燃料成分的分析方法，以及用于防止汽化燃料输送系统结垢的燃料调节溶液。讨论内容包括高压汽化燃料采样，从NGL中分离C7 +和C14 +烃馏分，以及燃料处理设备的性能验证。沙特阿美公司运营着来自四家制造商的80多个航改燃气涡轮机（CGT），以驱动原油泵并在穿越阿拉伯半岛的东西管道上产生电力。自1980年管道首次启用以来，CGT主要在汽化的C2 + NGL上运行。尽管这种C2 + NGL的特性（例如密度和热值）与丙烷几乎相同，但将其用作CGT燃料却带来了挑战。燃油系统结垢是由于重烃的存在而造成的，其中包括主要来自腐蚀抑制剂和间歇性原油残留的残余表面活性化合物。结垢包括汽化​​器下游所有歧管和燃料喷嘴通道的坚硬，类似环氧的沉积物。整个机队都遭受了运行和维护成本增加以及由于最后机会滤清器堵塞燃油喷嘴而导致可靠性降低的困扰。这导致燃烧器中的温度扩散和热组件损坏。高温额定聚结过滤器已成功应用于三种汽化NGL燃料系统配置。修改了一种要求更严格的燃油调节的燃油系统配置，以拒绝使用大约15％的NGL（重馏分）。进行了性能测试，以测量改性燃料蒸发器中重油减少的程度。开发了分析方法以鉴定和测量ppm浓度的重烃。在分析上确定的实际燃料成分与过程模拟预测的成分一致。

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