铝制板式换热器表面喷淋结垢行为研究

于得水, 刘永豪, 赵国栋, 侯岩, 解德甲, 王寒冰, 赵亓新, 齐建涛

doi:10.16577/j.issn.1001-1560.2023.0283

材料保护 >

2023 , Vol. 56 >Issue 12: 12 - 18

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0283

轻合金腐蚀与防护专栏

铝制板式换热器表面喷淋结垢行为研究

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¹中国石油大学(华东)石大山能新能源学院； ²上海蓝滨石化设备有限责任公司

齐建涛(1987-),副教授,博士,主要研究方向为金属腐蚀及表面改性,电话:15318778781,E-mail:jiantao.qi@upc.edu.cn

收稿日期: 2023-07-01

修回日期: 2023-08-02

录用日期: 2023-09-04

网络出版日期: 2024-01-08

基金资助

换热器用铝合金炼化厂外部喷淋性能评价研究(LB_20LKJC001);中国石油大学(华东)大学生自主创新项目(202107001) 资助

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Study on the Scaling Behavior of Spray on the Surface of Aluminum Plate Heat Exchanger

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(1. Shida Shanneng New Energy College, China University of Petroleum (East China), Qingdao 266580, China;2. Shanghai Lanbin Petrochemical Equipment Co., Ltd., Shanghai 201518, China)

Received date: 2023-07-01

Revised date: 2023-08-02

Accepted date: 2023-09-04

Online published: 2024-01-08

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摘要

近年来换热器中闭式循环水系统不断发展,在夏季高温换热过程中,其外部喷淋系统易引起换热器结垢及腐蚀。为了研究喷淋工作溶液在不同pH值及喷淋状态下对换热器的结垢及腐蚀影响情况,设计了浸泡实验、间隔滴定法等实验方法,模拟实际工作环境,通过样板微观表面形貌观察、质量变化、电化学性能测试等表征方法进一步明确了换热器结垢机理。实验结果表明:在短周期加热滴定实验下,pH=5的模拟溶液在动态环境下容易发生反应,在扁管位置易结垢;在浸泡实验、长周期加热滴定实验下,模拟溶液处于相对静态条件,实验样品不易出现结垢,丰富了板式换热器结垢情况的相关研究,为以后板式换热器结垢及腐蚀防护提供了有力依据。

关键词： 换热器; 结垢; 喷淋; 性能表征

本文引用格式

于得水, 刘永豪, 赵国栋, 侯岩, 解德甲, 王寒冰, 赵亓新, 齐建涛 . 铝制板式换热器表面喷淋结垢行为研究[J]. 材料保护, 2023 , 56(12) : 12 -18 . DOI: 10.16577/j.issn.1001-1560.2023.0283

Abstract

In recent years, closed circulating water systems in heat exchangers have been developing continuously. During the high-temperature heat exchange process in summer, the external spray system can easily cause scaling and corrosion of the heat exchanger. In order to study the factors affecting the scaling and corrosion of the heat exchanger under different pH and spray conditions of the spray working solution, the experimental methods such as immersion experiments and interval titration methods were designed to simulate the actual working environment. Moreover, the scaling mechanism of the heat exchanger was further clarified through characterization methods such as sample microsurface morphology, mass changes, and electrochemical performance tests. Results showed that under the short-cycle heating titration experiment, the simulated solution with pH=5 was prone to react in a dynamic environment and was prone to scaling in the flat tube. Under the immersion experiment and the long-cycle heating titration experiment, the simulated solution was in the relatively static condition, and the experimental samples were not easy to be scaled. In general, this work enriched the related research on plate heat exchanger fouling and provided a strong basis for future plate heat exchanger fouling and corrosion protection.

Key words： heat exchanger; fouling; spraying; performance characterization

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