Boosting reliability in polymer production
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Shenghong Fiber Company has improved solvent recovery and isconserving energy thanks to a three-stage ethylene-glycol driven vacuum system from Croll Reynolds.
In conventional steam jet ejector systems used in polymer production, fouling in the initial stages of the ejector is unavoidable due to polymer carryover from the process. In addition, the ethylene-glycol used as a process solvent contaminates the steam condensate. The solution for Shenghong Fiber Company's facilities in Wujinag City is a vacuum system designed and manufactured by Croll Reynolds that uses ethylene-glycol as the motive fluid (MEG).
Using the process solvent as the motive fluid for the reactor ejectors puts an end to contamination problems in the steam condensate. The MEG-driven ejectors in the system run hotter than conventional steam driven ejectors and fouling due to polymer carryover is reduced significantly. Process contamination from steam backstreaming is also reduced.
The high boiling point of the organic solvent also enables the intercondensers to operate at lower pressures, which significantly reduces the overall energy requirements of operating the system.
30 September 2006
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