氢化松脂连续蒸馏工艺研究与设计

Design of Continuous Distillation Process for Hydrogenated Turpentine System

以优油和中油为溶剂调配氢化松脂浓度,测定在常压和温度为169.2~236.6℃下氢化松脂体系气液平衡数据,考察优油和中油为溶剂对氢化松脂蒸馏解吸氢化松节油的影响,并依据氢化松脂体系气液平衡数据,对年产1万吨氢化松香连续蒸馏过程和操作温度进行了设计计算。研究结果表明:当以单萜烯质量分数为87.69%优油作溶剂时,氢化松脂体系相平衡温度随着氢化松香与倍半萜烯浓度增大而升高,但该体系相平衡温度都在189.8℃以下;当以单萜烯质量分数为65.35%中油作溶剂时,氢化松脂体系相平衡温度也是随着氢化松香与倍半萜烯浓度增大而升高,最高温度可达到236.6℃。年产1万吨氢化松香连续蒸馏过程,当采用先入预蒸器再进入连续蒸馏塔工艺时;蒸馏塔塔板数为10块,其中优油段为6块,重油段为4块,塔径为500 mm。

The gas-liquid equilibrium data points of hydrogenated rosin system at atmospheric pressure and temperatures of 169.2-236.6℃were measured using excellent oil and medium oil as solvents to adjust the concentration of hydrogenated rosin.The effects of excellent oil and medium oil as solvents on the distillation and desorption of hydrogenated turpentine were investigated.According to the gas-liquid equilibrium data of hydrogenated rosin system,the continuous distillation process and operating temperature of 10000 tons of hydrogenated rosin were designed and calculated.The results showed that the phase equilibrium temperature of the hydrogenated rosin system increased with the increase of the concentration of hydrogenated rosin and sesquiterpene when the mass fraction of monoterpene was 87.69%,while the phase equilibrium temperature of the system was below 189.8℃.When the monoterpene mass fraction was 65.35%,the phase equilibrium temperature of the hydrogenated rosin system also increased with the increase of the concentration of hydrogenated rosin and sesquiterpene,and the maximum temperature could reach 236.6℃.The number of distillation column plates is 10,including 6 excellent oil sections and 4 heavy oil sections,and the tower diameter is 500 mm for an annual output of 10000 tons of hydrogenated rosin continuous distillation process useing a pre-evaporator section.