大温差长输供热管网的防腐防垢策略研究与应用

郑刚, 李金刚, 王鼎力, 宫清臣, 肖海刚, 黄万启

doi:10.16577/j.issn.1001-1560.2024.0214

材料保护 >

2024 , Vol. 57 >Issue 9: 168 - 174

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0214

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大温差长输供热管网的防腐防垢策略研究与应用

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¹国能宁夏供热有限公司； ²西安热工研究院有限公司

肖海刚(1990-)，博士，高级工程师，主要从事电力设备腐蚀与防护研究，电话:029-82002217，E-mail: xiaohaigang＠tpri.com.cn

收稿日期: 2023-10-25

修回日期: 2024-02-11

录用日期: 2024-02-15

网络出版日期: 2024-11-14

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Research and Application of Corrosion and Scaling Prevention Strategies for Long-Distance Heating Pipe Network with Large Temperature Difference

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(1.Guoneng Ningxia Heating Co.， Ltd.， Yinchuan 750000， China；2.Xi’an Thermal Power Research Institute Co.Ltd， Xi’an710054， China)

XIAO Haigang(1990-)，Ph.D.， Senior Engineer， Research Focus: Corrosion and Protection of Electric Power Equipment， Tel: 029-82002217， E-mail: xiaohaigang＠tpri.com.cn

Received date: 2023-10-25

Revised date: 2024-02-11

Accepted date: 2024-02-15

Online published: 2024-11-14

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摘要

宁夏A 供热公司采用大温差长输供热技术，2019 ～2021 年连续2 个采暖季发现其二级管网内存在明显的结垢、不锈钢点蚀和碳钢腐蚀现象，严重影响冬季居民供热效果。供热公司针对其水质特点及运行情况展开了阻垢缓蚀剂研发、点蚀临界条件研究等工作，最终确定了以添加TC 型阻垢缓蚀剂为主的防腐防垢方案。通过工业试验的检验，换热板抽查无明显的点蚀和结垢现象，碳钢腐蚀挂片结果表明管道内壁腐蚀速率得到了有效控制，保证了供热系统的安全经济运行，该种防腐防垢策略在同类型供热系统中具有较高的推广价值。

关键词： 供热管网; 防腐防垢策略; 不锈钢点蚀; 碳钢腐蚀; 大温差

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郑刚, 李金刚, 王鼎力, 宫清臣, 肖海刚, 黄万启 . 大温差长输供热管网的防腐防垢策略研究与应用[J]. 材料保护, 2024 , 57(9) : 168 -174 . DOI: 10.16577/j.issn.1001-1560.2024.0214

Abstract

Ningxia A Heat Supply Company adopted the large temperature difference long-distance heating technology.During two consecutive heating seasons from 2019 to 2021， significant scaling， pitting corrosion of stainless steel and corrosion of carbon steel were observed in the secondary pipeline network， which severely impacted the heating effect for residents during the winter.The heat supply company conducted research and development on scale and corrosion inhibitors，as well as studies on the critical conditions for pitting corrosion，based on the characteristics of its water quality and operating conditions.Ultimately， an anti-corrosion and anti-scaling strategy centered on the addition of TC-type scale and corrosion inhibitors was determined.Through industrial trials， random inspections of the heat exchanger plates revealed no significant pitting or scaling， and the results of carbon steel corrosion coupon tests indicated that the corrosion rate of the inner pipeline walls was effectively controlled.This ensured the safe and economical operation of the heating system.The corrosion and scale prevention strategy has shown great potential for broader application in the same type of heating systems.

Key words： ; font-family:"; font-size:16px; font-style:normal; font-weight:400; ">heat supply network； anti-corrosion and anti-scaling strategy； pitting corrosion of stainless steel； corrosion of carbon steel； large temperature difference

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