Abstract:

The circulating cooling water system of a thermal power plant is an important part of the normal operation of the plant, and the scaling of its pipes and heat exchangers has always been an important issue that affects the operational safety and effectiveness of the subsystems. In this paper, for the spike cooling circulating water system of Shanxi Guoneng Yuji Cogeneration Co., Ltd, the comparative analysis of the water and particle flow in the pipeline with and without excitation coils on the outer wall was firstly carried out by using COMSOL Multiphysics. It was found that particle aggregation with coils was more obvious than without coils, and fewer particles remained with coils under the same fluid velocity through the pipeline with the same length than without coils. Meanwhile, fluid velocity of 5 m/s also left fewer particles than fluid velocity of 2 m/s. Then the electromagnetic anti-scaling and descaling equipment was installed on the vertical branch pipe of the return water of the peak cooling circulating water system. The analysis and testing of the water body showed that the electromagnetic anti-scaling and descaling could significantly increase the conductivity of the water body.

Key words: thermal power plant, electromagnetic scale prevention and inhibition, circulating cooling water system

摘要：

热电厂循环冷却水系统是电厂正常运行的重要组成部分，其管道和换热器结垢一直是影响各子系统运行安全和效能的重要问题。针对山西国能榆次热电有限公司的尖峰冷却循环水系统，先运用COMSOL Multiphysics对外壁有无激励线圈时的管道内水体和粒子流动进行了比较分析发现，有线圈时比无线圈时的粒子聚集得更明显，相同流体速度下，有线圈时比无线圈时通过相同长度管道所残留的粒子更少，同时流体速度为5 m/s的比流体速度为2 m/s所残留的粒子也更少。然后将电磁防垢除垢设备安装在尖峰冷却循环水系统的回水垂直支管管道上进行试验。对水体的分析检测表明电磁防垢除垢可以显著增加水体的电导率。

关键词: 热电厂, 电磁防垢阻垢, 循环冷却水系统

CLC Number: 

• TQ085