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Study and Application of a Cyclone for Removing Amine Droplets from Recycled Hydrogen in a Hydrogenation Unit

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Volume: 14 | Issue: 6 | Pages: 1675-1684
DOI: 10.4209/aaqr.2013.09.0303
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Liang Ma1, Jingping Wu1, Yanhong Zhang1, Qisong Shen2, Jianping Li2, Hualin Wang 1

  • 1 State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
  • 2 Shanghai Huachang Environmental Protection Co. Ltd., 188 Maoting Road, Shanghai, 201611, China

Abstract

Recycled hydrogen is fed into a hydrogenation unit using a compressor with oil gas, amine droplets, and other hazardous gases at a super-high operating pressure after having been passed through a desulfurization system. This study developed a gas-liquid cyclone for removing amine droplets in recycled hydrogen based on computational fluid dynamics (CFD), an experimental study and industrial application. The results showed that the highest separation efficiency of the gas-liquid cyclone was 94.8% (experiment) and 97% (CFD) under 20°C and atmospheric pressure. Sampling and analysis showed that the highest separation efficiency for industrial application was 99.9% under 50°C and 10.7 MPa. The device purified the recycled hydrogen, and reduced both raw material losses and desulfurizer consumption. The energy consumption of the cycled hydrogen compressor and the pollution discharge of the hydrogenation unit were also reduced.

Keywords

Amine droplet Desulfurization Gas-liquid cyclone separation Hydrogenation unit


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