Production process and device for preparing ethylene through dehydration of ethanol
An ethanol dehydration and production process technology, applied in ethylene production, products, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problem of unreasonable energy utilization in low-temperature refining process, lack of global understanding of ethanol-to-ethylene process, and process waste emissions. It can improve the level of green production, inhibit catalyst carbon deposition, and reduce steam consumption.
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Embodiment 1
[0050] Raw material ethanol feed rate is 4200kg / hr, enters ethanol evaporation tank 102 after being preheated by ethanol preheater 101, evaporates after being heated by ethanol evaporator 108 and ethanol evaporator 109, ethanol vapor from ethanol evaporation tank 102 passes through The ethanol superheater 103 is heated by the reaction gas to raise the temperature to 300°C. The overheated ethanol is divided into three streams and enters the heating furnace 104 to be heated and sent to the reactor; part of the overheated ethanol vapor is mixed with the water vapor recovered from the quenching compression system and then enter The first stage of the heating furnace 104 is heated and sent to the first reactor 105. The inlet temperature of the first reactor 105 is 420°C, the outlet temperature is 300°C, and the operating pressure is 0.75Mpa.
[0051] The reaction gas from the first reactor 105 is mixed with part of the ethanol vapor from the ethanol superheater 103, enters the secon...
Embodiment 2
[0061] Raw material ethanol feed rate is 4500kg / hr, enters ethanol evaporation tank 102 after being preheated by ethanol preheater 101, evaporates after being heated by ethanol evaporator 108 and ethanol evaporator 109, ethanol vapor from ethanol evaporation tank 102 passes through The ethanol superheater 103 is heated by the reaction gas to raise the temperature to 300°C. The overheated ethanol is divided into three streams and enters the heating furnace 104 to be heated and sent to the reactor; part of the overheated ethanol vapor is mixed with the water vapor recovered from the quenching compression system and then enter The first section of the heating furnace 104 is heated and sent to the first reactor 105. The inlet temperature of the first reactor 105 is 480°C, the outlet temperature is 370°C, and the operating pressure is 1.0Mpa.
[0062] The reaction gas from the first reactor 105 is mixed with part of the ethanol vapor from the ethanol superheater 103, enters the seco...
Embodiment 3
[0072] Raw material ethanol feed rate is 5120kg / hr, enters ethanol evaporation tank 102 after being preheated by ethanol preheater 101, evaporates after being heated by ethanol evaporator 108 and ethanol evaporator 109, ethanol vapor from ethanol evaporation tank 102 passes through The ethanol superheater 103 is heated by the reaction gas to raise the temperature to 300°C. The overheated ethanol is divided into three streams and enters the heating furnace 104 to be heated and sent to the reactor; part of the overheated ethanol vapor is mixed with the water vapor recovered from the quenching compression system and then enter The first section of the heating furnace 104 is heated and sent to the first reactor 105. The inlet temperature of the first reactor 105 is 520°C, the outlet temperature is 430°C, and the operating pressure is 1.25Mpa.
[0073] The reaction gas from the first reactor 105 is mixed with part of the ethanol vapor from the ethanol superheater 103, enters the sec...
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