合成氨冷冻系统增加蒸发式水冷器的技术改造

结合我公司合成氨冷冻系统改造的实际情况,介绍了ZFL-2500蒸发式水冷器的结构特点及其在合成氨冷冻系统中的创新应用,及其带来的经济效益。

氨水制备工艺与冰机系统优化的结合应用

随着国家环保要求的日益严苛,锅炉烟气脱硫等环保设施不断增加,由此带动了氨水需求量的逐步增加。针对安阳化学工业集团有限责任公司合成氨装置冰机系统负荷高、压力高的实际情况,将氨水制备工艺与冰机系统优化结合应用——在冰机出口增设1台蒸发式水冷器(利旧)、冰机入口增设1套氨水制备装置。实际应用结果表明,氨水制备工艺与冰机系统优化的结合应用,不仅解决了冰机系统压力偏高、冰机运行故障增加乃至合成氨系统减量、波动的问题,而且减少了气氨放空量、增加了氨水产量,具有良好的经济效益和环保效益。

甲醇精馏系统螺旋缠绕管式换热器应用总结

针对河南心连心化肥有限公司一分厂甲醇精馏系统中常压塔塔顶甲醇蒸气采用蒸发式水冷器进行冷凝时,其热量直接被冷却水带走而导致的低位热能浪费现象,通过设备选型计算,决定采取在常压塔蒸发式水冷器前增设螺旋缠绕管式换热器以回收低位热能的技改方案。实施后,常压塔工况变化不大,其蒸发式水冷器可停运部分附属风机和水泵,具有一定的节电效益,同时回收的低位热能用于生活区供暖也带来一定的节能效益。

Thermal transfer experimental research of a horizontal tube evaporative condenser

The thermal resistances distribution in different wet-bulb temperatures, air velocities and spraying water densities were achieved by the experimental test. The fluctuation of the water film convection and the water-air interfacial thermal resistance were reviewed especially. In the distribution of thermal resistance, the rank of the thermal resistance proportion （from max to min） is air flow heat transfer resistance, heat transfer resistance between refrigerant and wall, water film convection resistance and wall heat transfer resistance. When the heat flux is constant, the total resistance lowers nearly along with the increasing of air flow and water spray density. But there are a best air flow value of 2.98 m/s and a best spray water density of 0.064 kg/（m ·s） respectively, if continue to increase them, condensation performance is not significantly improved any more. The test results are available to improve the evaporative condenser performance and the designing lever.