Refining system and method of ethanol-containing aqueous solution
A refining system, a technology for aqueous solutions, applied in the separation/purification of hydroxyl compounds, organic chemistry, etc., can solve the problems of high steam consumption, increase the production cost of anhydrous ethanol, etc., and achieve the effect of reducing energy consumption
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Embodiment 1
[0056] use figure 1 The process flow shown is implemented. After exchanging heat between the fermented mash (with an ethanol content of 12% by weight) and steam at a temperature of 150° C., the fermented mash with a temperature of 75° C. was obtained. The 35% by weight of the above-mentioned fermented mash is sent to the first stripper 3 for distillation, and the 65% by weight of the fermented mash is sent to the second steamer after exchanging heat with the heavy components at the bottom of the tower discharged from the second stripper 4. Distill in the lifting column 4, and the heavy components at the bottom of the column after heat exchange are discharged.
[0057] After the light components at the top of the first stripper 3 exchange heat with the first raw material heat exchanger 1 (2, the heat exchange medium is fermented mash with an ethanol content of 12% by weight without preheating), the condensed The liquid component enters the light wine tank 7, and the uncondens...
Embodiment 2
[0061] Carry out according to the method in embodiment 1. the difference is:
[0062] 1) the weight of the fermented mash sent into the first stripper 3 is 40% by weight, and the weight of the fermented mash sent into the second stripper 4 is 60% by weight;
[0063] 2) After the stable cycle, the heavy components at the bottom of the first rectification tower 6 are circulated and exchanged with steam at 150°C. The pressure of the first rectification tower 6 is 5.4atm, the temperature at the top of the tower is 128°C, and the temperature at the bottom of the tower is 128°C. It is 148 ℃, the number of trays is 61, and the reflux ratio is 1: 2.3; the pressure of the first stripper 3 is 0.3 atm, and the tower top temperature is 67 ℃, and the bottom temperature is 83 ℃, and the reflux ratio at the bottom of the tower is 18: 1; the pressure of the second stripping tower 4 is 1.9 atm, and the tower top temperature is 102 ℃, and the tower bottom temperature is 112 ℃, and the reflux r...
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