Waste heat recovery in a chemical process and plant, particularly for the synthesis of ammonia
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United States of America Patent
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Nov 7, 2017
Grant Date -
Nov 13, 2014
app pub date -
Jul 28, 2014
filing date -
Sep 3, 2009
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Abstract
A method for recovering waste heat in a process for the synthesis of a chemical product, particularly ammonia, where the product is used as the working fluid of a thermodynamic cycle; the waste heat is used to increase the enthalpy content of a high-pressure liquid stream of said product (11), delivered by a synthesis section (10), thus obtaining a vapor or supercritical product stream (20), and energy is recovered by expanding said vapor or supercritical stream across at least one suitable ex-pander (13); the method is particularly suited to recover the heat content of the syngas effluent after low-temperature shift.
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