发电技术 ›› 2024, Vol. 45 ›› Issue (4): 590-599.DOI: 10.12096/j.2096-4528.pgt.23015
夏忠林1, 陈文通2, 许书峤1, 吴忠胜2, 谢强1, 马双忱1, 马京香1
收稿日期:
2023-12-20
修回日期:
2024-03-16
出版日期:
2024-08-31
发布日期:
2024-08-27
通讯作者:
马京香
作者简介:
基金资助:
Zhonglin XIA1, Wentong CHEN2, Shuqiao XU1, Zhongsheng WU2, Qiang XIE1, Shuangchen MA1, Jingxiang MA1
Received:
2023-12-20
Revised:
2024-03-16
Published:
2024-08-31
Online:
2024-08-27
Contact:
Jingxiang MA
Supported by:
摘要:
目的 烟塔合一技术是火电厂提高能效的重要改造手段,但是实际运行对现有系统造成的不利影响也不容忽视。为此,对烟塔合一技术应用现状及其在运行中存在的问题进行分析,并提出处理对策。 方法 通过综合分析现有研究,探讨了烟塔合一技术改造后造成环境影响、冷却塔塔体腐蚀以及循环冷却水水质恶化的成因和形成机理。 结果 根据计算流体动力学(computational fluid dynamics,CFD)对烟气排放轨迹以及污染物落地浓度的模拟结果,可合理设置防护距离,并通过塔顶加装挡板预防极端天气下的烟气下洗现象;针对不同部位,可采用不同防腐涂料对冷却塔进行防腐改造,以延长其使用寿命;为控制和优化循环水质,需采用深度水处理方法优化药剂投加,并适当控制循环水排污量与补水量,以维持其运行可持续性。 结论 通过采取适当的应对措施,可以有效缓解烟塔合一技术改造所带来的负面影响,提高火电厂环境效益和经济效益。
中图分类号:
夏忠林, 陈文通, 许书峤, 吴忠胜, 谢强, 马双忱, 马京香. 火电厂烟塔合一技术应用现状与现存问题分析[J]. 发电技术, 2024, 45(4): 590-599.
Zhonglin XIA, Wentong CHEN, Shuqiao XU, Zhongsheng WU, Qiang XIE, Shuangchen MA, Jingxiang MA. Application Status and Existing Problem Analysis of the Natural Draft Cooling Towers With Flue Gas Injection Technology in Thermal Power Plants[J]. Power Generation Technology, 2024, 45(4): 590-599.
大气状态 | 不同风速下烟气抬升高度/m | |||
---|---|---|---|---|
0.5 m/s | 1.5 m/s | 3.0 m/s | 4.5 m/s | |
不稳定 | 1 100 | 1 000 | 800 | 300 |
中性 | 750 | 300 | 200 | 150 |
稳定 | 250 | 150 | 120 | 80 |
表1 烟气抬升高度与大气状态关系
Tab. 1 Relationship between smoke lift height and atmospheric state
大气状态 | 不同风速下烟气抬升高度/m | |||
---|---|---|---|---|
0.5 m/s | 1.5 m/s | 3.0 m/s | 4.5 m/s | |
不稳定 | 1 100 | 1 000 | 800 | 300 |
中性 | 750 | 300 | 200 | 150 |
稳定 | 250 | 150 | 120 | 80 |
参数 | 数值 | 参数 | 数值 |
---|---|---|---|
电导率/(μS⋅cm-1) | 957 | Cl-质量浓度/(mg⋅L-1) | 30.00 |
pH值 | 2.55 | NO3-质量浓度/(mg⋅L-1) | 2.50 |
Cu2+质量浓度/(mg⋅L-1) | 0.002 7 | NO2-质量浓度/(mg⋅L-1) | 0.00 |
Fe3+质量浓度/(mg⋅L-1) | 25.48 | SO42-质量浓度/(mg⋅L-1) | 160.00 |
Fe2+质量浓度/(mg⋅L-1) | 2.30 | SO32-质量浓度/(mg⋅L-1) | 6.05 |
Al3+质量浓度/(mg⋅L-1) | 0.096 5 | 总硫质量浓度/(mg⋅L-1) | 59.38 |
Na+质量浓度/(mg⋅L-1) | 0.620 1 | S2-质量浓度/(mg⋅L-1) | 0.006 0 |
K+质量浓度/(mg⋅L-1) | 0.284 7 | 总磷质量浓度/(mg⋅L-1) | 0.007 5 |
Ba2+质量浓度/(mg⋅L-1) | 0.006 5 | Ca2+质量浓度/(mg⋅L-1) | 1.185 0 |
Sr2+质量浓度/(mg⋅L-1) | 0.007 2 | Mg2+质量浓度/(mg⋅L-1) | 0.281 5 |
表2 烟气结露成分分析
Tab. 2 Composition analysis of flue gas condensation
参数 | 数值 | 参数 | 数值 |
---|---|---|---|
电导率/(μS⋅cm-1) | 957 | Cl-质量浓度/(mg⋅L-1) | 30.00 |
pH值 | 2.55 | NO3-质量浓度/(mg⋅L-1) | 2.50 |
Cu2+质量浓度/(mg⋅L-1) | 0.002 7 | NO2-质量浓度/(mg⋅L-1) | 0.00 |
Fe3+质量浓度/(mg⋅L-1) | 25.48 | SO42-质量浓度/(mg⋅L-1) | 160.00 |
Fe2+质量浓度/(mg⋅L-1) | 2.30 | SO32-质量浓度/(mg⋅L-1) | 6.05 |
Al3+质量浓度/(mg⋅L-1) | 0.096 5 | 总硫质量浓度/(mg⋅L-1) | 59.38 |
Na+质量浓度/(mg⋅L-1) | 0.620 1 | S2-质量浓度/(mg⋅L-1) | 0.006 0 |
K+质量浓度/(mg⋅L-1) | 0.284 7 | 总磷质量浓度/(mg⋅L-1) | 0.007 5 |
Ba2+质量浓度/(mg⋅L-1) | 0.006 5 | Ca2+质量浓度/(mg⋅L-1) | 1.185 0 |
Sr2+质量浓度/(mg⋅L-1) | 0.007 2 | Mg2+质量浓度/(mg⋅L-1) | 0.281 5 |
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