Simple solutions - with the right seal
Heavy hydrocarbons such as bitumen from the vacuum distillation process and thermal cracking methods are converted into gases, fuels, middle distillates and pet coke in the coker unit. High process temperatures required by the process, due to the high solidifying points, combined with the extremely contaminated media, are the main challenges for the mechanical seal technology.
High process temperatures required by the process, due to the high solidifying points, combined with the extremely contaminated media, are the main challenges for the mechanical seal technology.
Technically mature MFLWT and Y9 high-temperature metal bellows seals and suitably designed EagleBurgmann supply systems have been most successful in this challenging environment.
Pumps in upgraders at Suncore Energy in Fort McMurray, Alberta, Canada are equipped with EagleBurgmann HRZS1/80 mechanical seals.
Operating conditions: p = 11.38 bar (165 PSI); t = 92.2 °C ... 182.2 °C (198 °F ... 360 °F).
Fujian Refining & Petrochemical Co., Ltd. in China applies a BB2 pump for propane de-asphalting. The shaft seal is an EagleBurgmann SHV1/102-PTA1/2. Configuration 2CW-CW, piping plans 21+52.
Operating conditions: p = 73 barg (1,059 PSIG); t = 165 °C (329 °F); n = 2,970 min⁻¹.
For a KSB pump installed in the delayed coker unit, the Indian Panipat refinery applied EagleBurgmann pusher seals LL9DTUU in tandem arrangement.
Operating conditions: p = 23.5 bar (340 PSI); t = 40 °C (104 °F); n = 2,900 min⁻¹; d₁ = 58 mm (2.28"). Media: hydrocarbons.
Bhel compressor in the delayed coker unit of the Panipat refinery run by the Indian Oil Corporation Ltd. The machine is equipped with EagleBurgmann DGS20.1/200 tandem gas seals and a diaphragm coupling.
Operating conditions: p = 6 barg (87 PSIG); t = 150 °C (302 °F); n = 8,909 min⁻¹; d₁ = 180 mm (7.09"). Medium: flue gas.
An EagleBurgmann MFLWTS1/83 seals the shaft of a Leistritz screw pump in the de-asphalting unit of the ENI refinery in Sannazzaro de' Burgondi, Italy. Pump and metal bellows seals were started up in 2006.
Operating conditions: p = 1.87 bar (27 PSI); t = 274 °C (525 °F); n = 1,700 min⁻¹; d₁ = 75 mm (2.95"). Medium: asphaltene.
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