低能耗CO_(2)混合胺吸收剂复配筛选与工业验证

Screening and engineering verification of a low energyconsumption CO_(2)mixed amine absorbent

在如今温室效应日益严重背景下,化学吸收法作为当前最具应用前景的燃煤烟气脱碳技术,受国内外广泛关注,开发低再生能耗、高稳定、易工程化应用的吸收剂是目前研究热点。提出了以高容量、低能耗三级胺为吸收剂主剂,高动力学一级胺和高稳定环状胺为辅剂吸收剂方案;并形成了从实验室配方遴选、百标方时中试工艺匹配到每年万吨级规模工业装置运行优化的工程化开发体系。通过鼓泡吸收试验与吸收-再生循环试验对吸收剂进行快速筛选,初筛获得一种性能好的吸收剂配方,通过200 m^(3)/h中试与万吨级工业装置测试优化运行参数并完成工业验证。测试结果表明,开发的CEU型吸收剂CO_(2)脱除率达90%,最优再生热耗达2.42 GJ/t CO_(2),在工业装置上完成了>700 h稳定运行。

With the increasingly serious greenhouse effect,chemical absorption method,as the most promising technology for decarbonization of coal-fired flue gas,has received wide attentionof China and abroad.The development of absorbents with low energy consumption,high stability and easy engineering application is a research hotspot at present.An absorbent scheme was proposed with high capacity and low energy consumption tertiary amine as the main absorbent,high kinetic primary amine and high stable cyclic amine as the auxiliary agent.An engineering development system has been formed,ranging from the selection of laboratory formula,the matching of 100 standard square meters per hour pilot energy-saving process to the optimization of the operation of 10000 standard square meters per hour scale industrial devices.Through the quick screening of absorbents was carried out through bubbling absorption experiment and absorption-regeneration cycle experiment,and an absorbent formula with excellent performance was obtained through primary screening.Further,the energy-saving process was optimized and its operation stability was verified through the test of 200 m^(3)/h pilot plant and 10000 tons of industrial plant.The test results show that the CO_(2)removal rate of the CEU type absorbent developed in this study reaches 90%,and the optimal energy consumption reaches 2.42 GJ/t CO_(2),and it has completed 700 hours of stable operation on the industrial device.