Understanding and eliminating pressure fluctuations in an extended chlor-alkali plant due to the size detail of seal pots: A design correlation |
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| Authors: | Sazal Kumar Kundu |
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| Institution: | 1. University of California Davis, Department of Chemical Engineering & Materials Science, One Shields Avenue, Davis, CA 95616, United States;2. RWTH Aachen University, Faculty of Mechanical Engineering, Templergraben 55, Aachen 52056, Germany;1. MST Division, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India;2. Department of Metallurgical Engg., National Institute of Technology, Raipur 492010, India;1. University of Castilla-La Mancha, Faculty of Chemical Sciences & Technologies, Chemical Engineering Department, Av. Camilo José Cela, 12, 13071 Ciudad Real, Spain;2. Università degli Studi di Palermo, Dipartimento di Ingegneria, Viale delle Scienze, Palermo, Italy;1. Eindhoven University of Technology, Eindhoven, The Netherlands;2. Akzo Nobel Industrial Chemicals B.V., Amsterdam, The Netherlands |
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| Abstract: | When chlorine lines from a new caustic soda plant were added to chlorine lines from an older plant that used the same chlorine compression and liquefaction systems, we encountered abnormal pressure fluctuations on the chlorine side of the new plant. These fluctuations were being transmitted to the chlorine cycle in the older plant, posing a safety hazard in both facilities. After checking the pressure control systems, a design correlation for positive-pressure seal pot was observed and it was found from the inconsistency in the sizes of those equipments in the two plants. The problem was solved by reducing the diameter of the chlorine pipeline in the positive-pressure seal pot of the new plant. After implementing this solution, pressure fluctuations were fully removed, and satisfactory pressure control was attained in both plants. |
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