尿素解吸装置的改造

采用尿素深度水解技术对水溶液全循环法尿素解吸装置进行了改造，分析和论述了改造方案、工艺流程和主要工艺指标，介绍了装置投运后的改进措施；从环保达标和经济效益方面总结了改造效果。结果表明，改造后解吸废液中氨含量从0．1％降低到30mg／L，尿素含量从1．2％降低到60mg／L，经济效益每年增加120万元。投资回收期为6年。

Reformation of Urea Adsorption Unit

The urea adsorption unit operated with water solution total cycle method was reformed by urea deep hydrolysis technology, reformation scheme, process flow and main process indexes were analyzed & discussed, improvement measures after putting into operation of unit were introduced; reformation effect was summarized from aspects of fulfilling standard requirement for environment protection and economic benefit. The result indicates that the ammonia content in adsorbed waste solution after reformation is reduced from 0.1% to 30 mg/L, and urea content is reduced from 1.2% to 60 mg/L, the economic benefit increased annually is 1.2 million RMB Yuan, the invest recovery period is 6 years.