Wuhu Hengxin Cable Co., Ltd
Contact：Mr Dai
Phone: 13955309088
Address: 13955309088@163.com
Address: Jiuhua North Road Electrical Components Industrial Park, Wuhu City, Anhui Province
The role of series constant power electric heating belt
苯原料管道、储罐工艺温度: 苯结晶点为5度左右，苯储运温度保持在15-20度，20度以上开始气化，80度沸点，有毒。在北方，由于气候恶劣，苯很容易结冰。苯输送管道通常更长，可达1600米。因此，在选择供暖方式时，需要考虑以下几个方面:
1、伴热温度不宜过高，温度控制准确。
2、伴热长度
3、安全
总结目前的伴热方法，如果采用蒸汽伴热，温度不宜控制过高，会导致苯气化。长输管道沿线要求有多个加汽点和疏水点，并且存在泄漏现象。此外，蒸汽还会对管道产生腐蚀，管道的局部腐蚀将严重影响生产。由于这些缺陷，许多炼油厂和其他石化企业开始采用电示踪法，通过面板进行示踪。立即查明问题，尽快处理管道没有保温的冻结问题。
对于长距离苯输送管道，可采用一条(或多条)串联的恒功率电热带，用于大型储罐的密集控制。电伴热的设定温度可以通过多点传感器和温度控制器实现: 10ー15 ° c 的伴热。优点如下:
1、布置长度灵活；
2、如控制失效不会造成部分物料超温；
3、控制灵活，节约动力；
4、控制已失效可强制运行，仍满足安全需求。
此外，少许例如50立方的小罐，较短的管道。可以应用并联恒功率大概自限温电热带予以办理，单根可达100-350米之间。
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