Snam氨汽提法尿素装置节能环保技术改造

系统总结了Snam氨汽提法尿素装置节能环保技术改造的方案、措施和效果：①改造中压惰气洗涤器,中压放空气的氨含量由15%降至5%;②改造解吸塔,解吸废水中尿素和氨的含量最低可降至1×10-6;③新增2台氨水槽,完善了密闭排放系统;④改造CO2压缩机组工艺冷凝液回收系统,避免了工艺冷凝就地排放,实现了水资源回收再利用;⑤改造尿素装置界区排放口,保证了外排废水稳定达标排放。

Technical Reformation for Energy Conservation and Environment Protection in Urea Plant by Snam Ammonia Stripping Method

Author has systematically summarized the scheme.Measures and effect for the technical reformation of energy conservation and environment protection as follows：①Reform the middle pressure inert gas scrubber,the ammonia content contained in middle pressure venting was reduced from 15% to 5%;②Reform the disrober,the contents of urea and ammonia desorbed from waste water can be reduced to a minimum of 1×10-6;③Newly add two ammonia water tanks,to improve the closed drainage system;④Reform the process condensate recovery system,to avoid the local drainage of the process condensate,and to realize the recovery and reutilization of water resource;⑤Reform the drainage port at the battery limit of urea plant,to guarantee to reach stably to standard requirement for discharging out the waste water.