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Density and Level Monitoring and Control in Polypropylene Plants

Houshmandian, Esmaeil | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45682 (55)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Hajsadeghi, Khosrow
  7. Abstract:
  8. Polypropylene plants receive propylene monomer and produce polypropylene polymer by inducing chemical reactions under high pressure and high temperature conditions. In these plants it is essential to monitor and carefully control the density and level of the material contents in slurry high pressure and high temperature reactors and vessels. Due to process conditions and the advantages of the non contact measuring method we use radioactive level and density measurement method specially gamma ray level and density detectors and transmitters in P.P plants. Sometimes, however known and unknown natural or manmade factors may affect the performance of these devices. The known factors such as NORM and TENORM and unknown factors can cause undesired performance of radioactive measurement devices including density and level measuring devices. Failure to control these parameters properly may result in reduced product quality or vessel overflow and catastrophic accidents in the plant. However, the common methods used for monitoring and controlling are not quite flawless. This project is focused on identifying the source of monitoring and controlling the problems in the plants and the proper solutions to the problems
  9. Keywords:
  10. Polypropylene ; Distributed Control ; Density Measurements ; Density Control

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