合成氨脱碳工艺和脱碳设备的技术改造

MDEA法脱碳是一种多胺法吸收工艺，虽然脱碳效果不错，但由于是化学反应吸收过程，脱碳后溶剂再生需要的能耗较高。为了达到节能的效果，本文指出河北新化股份有限公司将合成氨生产中的脱碳工艺由多胺法脱碳改造为碳酸丙烯酯脱碳，同时按照碳酸丙烯酯脱碳工艺的特点，对脱碳设备也进行了技术改造。采用高通量DJ-2型塔板代换了填料，实现了吸收设备与吸收工艺的最佳匹配，并提出了塔板在漏液区域操作脱碳效果更好的新工艺。改造后，可以实现了每吨氨节约蒸汽1363kg，年节能经济价值可达2040万元。

Technological transformation of synthetic ammonia decarburization process and its device

MDEA de-carburization is a multi-amine absorption process. Although de-carburization effect is good，but because of the nature of chemical reaction，energy consumption for decarburization solvent regeneration is higher. In order to achieve saving energy，the propylene carbonate method replaced the MDEA method for decarburization in Hebei Xinhua Company. According to the characteristics of decarburization process，decarburization equipment was transformed. The DJ-2 type plate replaced the packing originally used. It achieved the best matching for CO2 removal equipment and decarburization process，and decarburization operation in the weeping area was better. After transformation，the saving of steam per ton of ammonia was 1363 kg，and annual energy saving economic value was up to 20400000 yuan.