Analysis and Countermeasures of Ammonium Salt Crystallization in Raw Material/Reaction Product Heat Exchanger of Aviation Coal Hydrogenation Unit
Two years after the operation of a 190×104 t/a aviation kerosene hydrogenation unit in a petrochemical company,the crystallization of ammonium salts in the raw material/reaction product heat exchanger tube bundle caused a decrease in heat transfer efficiency,a decrease in outlet temperature of the heat exchanger tube,and a gradual increase in inlet and outlet pressure difference.In response to the problem of ammonium salt crystallization in the raw material/reaction product heat exchanger tube bundle,the reasons and processes for the formation of ammonium salt crystallization were analyzed in depth by comparing the properties of raw materials,process flow,and operating conditions.It was proposed to increase the intermittent water injection line of the raw material/reaction product heat exchanger,which achieved good results in controlling ammonium salt crystallization.
aviation fuelhydrorefiningraw material/product heat exchangerammonium salt crystallizationmeasures
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