Reason analysis of high consumption of triethylene glycol in drying unit and optimization measures
The drying unit of a coal-to-gas project in China is divided into A and B series.At the initial stage of operation,the consumption of triethylene glycol is lower than the design index,but after running for a period of time,the phenomenon of high consumption of triethylene glycol appears in the drying unit of both A and B series.Through the analysis of the operating indexes of drying unit of A and B series when the consumption of triethylene glycol is high,the reasons for the high consumption of triethylene glycol is found.Aiming at the reasons of high consumption of triethylene glycol,by lowering the temperature of wet natural gas and depleting triethylene glycol solution,reducing the amount of triethylene glycol brought out from natural gas,and retrofitting the process of waste liquid production of drying unit,adding the triethylene glycol collection line at the bottom of natural gas separator,so as to recycle and utilize the triethylene glycol in the waste liquid,thus reducing the triethylene glycol consumption in drying unit of A and B series.After the adjustment and transformation,the economy,stability and safety of the operation of the device are increased and the production cost is saved,thus realizing the cost reduction and efficiency increase.
drying planttriethylene glycolwaste liquid recyclingretrofitproperties of triethylene glycolmethane synthesis unit
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