氨法回收烟道气CO_2与尿素生产的联合
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摘要
传统工艺中,采用MEA法回收烟道气CO_2,CO_2以气体形式作为尿素生产的原料。提出了氨法回收烟道气CO_2,以碳铵液返回尿素装置与尿素生产联合的新工艺,并探讨了其可行性。与传统的MEA法相比,氨法流程简化,免去了再生环节。CO_2回收工段蒸汽消耗降低明显,尿素工段蒸汽和电力消耗略有上升,总体能耗耗降低,总体成本下降明显,技术和经济都是可行的。
In the traditional process, the CO_2 of flue gas is recovered by the MEA absorption, and the CO_2 is used as feedstock for urea production in the gaseous form. A new process for recovering CO_2 from flue gas by ammonia absorption and then returning the obtained ammonium bicarbonate solution to the urea plant for urea production was proposed, and its feasibility was discussed.Compared with the traditional MEA process, the ammonia process is simplified, eliminating the CO_2 regeneration process. For the new process, the steam consumption in the CO_2 recovery section is significantly reduced, even though both of steam and power consumption in the urea section are slightly increased, the overall energy consumption is reduced, and the total cost is significantly reduced. This new process is technically and economically feasible.
In the traditional process, the CO_2 of flue gas is recovered by the MEA absorption, and the CO_2 is used as feedstock for urea production in the gaseous form. A new process for recovering CO_2 from flue gas by ammonia absorption and then returning the obtained ammonium bicarbonate solution to the urea plant for urea production was proposed, and its feasibility was discussed.Compared with the traditional MEA process, the ammonia process is simplified, eliminating the CO_2 regeneration process. For the new process, the steam consumption in the CO_2 recovery section is significantly reduced, even though both of steam and power consumption in the urea section are slightly increased, the overall energy consumption is reduced, and the total cost is significantly reduced. This new process is technically and economically feasible.
引文
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