中文摘要：

为了降低溶液再生能耗,对中石化某7 000 kmol/h制氢尾气脱碳工程,采用传递现象速率为基础的蒸馏模拟技术的Ratebased方法对吸收塔、解吸塔进行模拟计算,开发了双塔再生苯菲尔脱碳工艺。研究表明,针对苯费尔脱碳工艺流程中塔设备单元,在保证吸收、再生效果以及塔不发生液泛的前提下,选择合适的理论板数、填料高度以及塔直径,可提高塔设备的效率;选择合适的工艺操作参数,可降低脱碳能耗。在工艺模拟基础上,开发了节能优化方案,将冷凝回水和补充水直接加入冷贫液作为高温贫液的冷却介质,可降低整个脱碳工艺能耗。经过节能工艺优化后,气体净化度提高,再生能耗以及整个工艺的冷凝总量降低。其中,再生出来的二氧化碳量增加了2.48%,即净化气中二氧化碳量只相当于未节能工艺净化气中的56.96%;再生单位二氧化碳溶液所需加热量降低了2.63%左右,整个脱碳工艺流程脱除单位二氧化碳冷凝量降低2.20%。

英文摘要：

In order to reduce the energy consumption in the regeneration of solution for the exhaust gas decarbonization unit in a 7 000 kmol·h-1hydrogen production facility of Sinopec Corp.,the Ratebased method,a distillation simulation technology based on transfer phenomenon rate,is used to simulate the absorption tower and desorption tower.On this foundation,the twin towers regeneration Benfield decarburization process is put forward.Research shows that as for the tower unit in Benfield decarbonization process,in the premise of ensuring the effects of absorption and regeneration as well as no tower flooding,the efficiency of tower operation can be improved by selecting appropriate number of theoretical plates,packing height and tower diameter; the energy consumption of decarburization can be reduced through choosing suitable process operating parameters.On the basis of the process simulation,the energy saving optimization scheme is developed. The energy consumption of the whole decarburization process can be cut down by adding both condensed backwater and supplement water into the cold lean solution as the cooling medium for high temperature lean solution.After the optimization of energy saving technology,the purification degree of gas is increased,and both the energy consumption of regeneration and the total condensation capacity of the whole process are reduced.Among them,the amount of carbon dioxide regenerated increases by 2. 48%,translating into that the content of carbon dioxide in purified gas is equivalent to 56. 96% of that in the purified gas by the process without optimization of energy saving.The heat needed by regeneration drops 2. 63%,and condensation capacity for removal of carbon dioxide in the whole decarburization process decreases by 2. 20%.