含硼溶液电伴热系统设计与控制

Design and Control of Electric Heating Tracing System for Boron-containing Solution

伴热系统设计与控制是解决某些溶液在低温条件下或环境温度降低时发生结晶,消除其储运系统中箱体设备和管道被结晶物堵塞风险的有效办法。针对某项目不同浓度含硼溶液的工艺要求、设备及管道的实际情况,进行了伴热需求分析,给出了管道和箱体设备热损失计算方法及计算结果,讨论了常用伴热系统的优缺点,认为项目更适合选用电伴热系统。介绍了电伴热线缆的类型及其选择要点、电伴热带的选型计算及控制流程,设计的电伴热系统实现了温度的自调控,保障了系统的稳定运行。

The design and control of the heating system is an effective way to solve the crystallization of certain solutions under low temperature conditions or when the ambient temperature is reduced,and to eliminate the risk of blockage of the tank equipment and pipelines in the storage and transportation system.According to the actual conditions of the process requirements,equipment and pipelines of a projects with different concentrations of boron-containing solutions,the heat tracing demand analysis was carried out,the heat loss calculation method and results of the pipelines and tank equipment were given,and the advantages and disadvantages of common heat tracing system were discussed.It is considered that electric heating system is more suitable for the project.The types of electric heating cables and their selection points were introduced,and the selection calculation and control process of electric heating cables were described.The designed electric heating system realizes the self-control of temperature and ensures the stable operation of the system.