Process and apparatus for heat recovery in vinyl chloride monomer plants or in integrated vinyl chloride monomer or polyvinyl chloride plants
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United States of America Patent
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Nov 1, 2016
Grant Date -
Nov 13, 2014
app pub date -
Nov 15, 2012
filing date -
Dec 8, 2011
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Abstract
Disclosed is a process and apparatus for heat recovery in vinyl chloride monomer manufacturing plants or in integrated vinyl chloride monomer/polyvinyl chloride manufacturing plants. A process for capture and use of excess heat recovered in the production of vinyl chloride includes distillatively purifying DCE in a high-boilers column, using a heat exchanger to capture thermal energy from a purified DCE vapor stream from the high-boilers column, generating low pressure steam from the captured thermal energy, returning condensed DCE vapors to the high-boilers column, and heating parts of the plant with the generated low pressure steam.
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