工业用蒸汽节能降耗装置

日期： 2022-09-26 作者：晟德亿编辑

很多用户的蒸汽管网都是在逐年不断扩建的过程中形成的，管道也是不断增加和连接的，所以往往会出现很多复杂的问题，有时无法考虑周全，只能“两害相权取其轻”。

蒸汽输送的关键是减少“泄漏”和保证蒸汽品质。在实际生产中，很多企业忽视了蒸汽品质的保证，因为很难准确预测和控制管道中蒸汽的状态，很难达到蒸汽消耗点的实际压力和饱和度。

蒸汽输送管网的有效节能措施如下：
1、确保蒸汽管道的流量：
由于管道内蒸汽流量过高，蒸汽压降会增大，用汽点的蒸汽品质也会相应降低，终会消耗更多的蒸汽。相反，如果管内流速过低，凝结速度会加快，热损失也会增加。
解决方法：根据实际工况的工艺要求严格计算蒸汽流量，然后根据压力、流量、流速等参数计算出相应的管径，并选择匹配的阀门，或者直接根据下表选择管道。
2、尽量减少蒸汽管道的散热；
所有蒸汽管表面、法兰、阀门等。应该绝缘以减少辐射损失。
另外，如果不是很有必要，主管道尽量用大主管道向车间输送蒸汽，不要过早的分成几个小管道，因为大管道散热面积更小，散热更少，所以尽量用大管道输送蒸汽。
比如，在相同压力下，1根DN150蒸汽管的输送能力和4根DN80管差不多，但4根DN80管的散热损失是DN150管的2.5倍。
3、排水干管的正确设计：
A.蒸汽总管沿管长平均每隔30-50m设置疏水点；管道的低点、转弯处和末端也应设置疏水点；
B.如果排水点或管道设计错误，冷凝水不能及时排出，会造成严重的水锤冲击，损坏阀门、管道、弯头、设备等。，并降低后续换热器的换热效率。

c、主排水管，需要在管道上做一个集水井，然后连接小口径的排水管道，让冷凝水顺利落入集水井，再通过疏水阀排出。否则如果没有集水井，很多时候冷凝水降不下来，会继续被蒸汽直接推开，造成后端蒸汽湿度大，水锤等问题。

更多蒸汽系统节能知识可关注“晟德亿蒸汽节能”！

上一篇：蒸汽系统冷凝水余热回收改造方案下一篇：蒸汽排空气阀在工业蒸汽系统中有哪些作用？

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