多元化尿素装置“花尿素”产生的原因及改进措施

为适应市场需求的变化,河南能源化工集团安化公司自2016年以来经过不断地技改与创新,基于200 kt/a氨汽提法尿素装置开发出了多肽尿素、锌腐酸尿素、腐殖酸尿素等多元化尿素产品(实行订单式生产)。受转产(不同尿素产品切换生产)及生产过程中系统异常波动等的影响,会产生较多的“花尿素”(次品),不利于系统的经济、优质运行。结合多元化尿素装置的工艺流程及实际生产情况,针对多元化尿素生产期间副产“花尿素”量多的问题进行摸索与攻关,对系统设备、工艺条件及操作方式等进行优化改进后,“花尿素”产量大幅降低,实现了降本增效。

Fate of Urea Applied to Peanut (Arachis hypogaea L.) on a Sloping Udic Ferrosol in Subtropical China

A field experiment was conducted to study the outcome of N using isotope-labeled urea with a peanut cropping system in a Udic Ferrosol on a 7% slope at the Ecological Experimental Station of Red Soil, Chinese Academy of Sciences. The micro-plots were designed in two sets with three replicates and four N treatments. An iron frame with its edge 10 cm above the ground was used to control soil erosion and runoff in set A, but in set B the upper edge of the frame was level with the ground. Randomly positioned 15…

多肽尿素生产工艺运行小结

根据市场用肥需求，在尿素系统原生产装置的基础上进行改造，开发生产新型智能控释肥——多肽尿素，针对试生产过程中暴露出的个别白色颗粒、杂色尿素、产品水份偏高和添加剂的添加量等问题进行摸索、攻关，上述问题得以控制。