大功率UV-LED散热与纳米TiO2光催化酸性红26耦合系统性能

doi:10.16085/j.issn.1000-6613.2022-1920

化工进展 ›› 2023, Vol. 42 ›› Issue (9): 4905-4916.DOI: 10.16085/j.issn.1000-6613.2022-1920

大功率UV-LED散热与纳米TiO₂光催化酸性红26耦合系统性能

王晨¹^,³(), 白浩良¹^,³, 康雪²^,³()

^1.中北大学环境与安全工程学院，山西太原 030051
^2.中北大学化学与化工学院，山西太原 030051
^3.中北大学德州产业技术研究院，山东德州 253000

收稿日期:2022-10-17 修回日期:2022-12-26 出版日期:2023-09-15 发布日期:2023-09-28
通讯作者: 康雪
作者简介:王晨（1987—），男，副教授，研究方向为高效散热技术。E-mail：chenwang87@nuc.edu.cn。
基金资助:
国家自然科学基金(21908208);博士后第67批面上项目(2020M670659);山西省自然科学青年基金(201901D211224);山西省高校创新基金(2019L0575)

Performance study of high power UV-LED heat dissipation and nano-TiO₂ photocatalytic acid red 26 coupling system

WANG Chen¹^,³(), BAI Haoliang¹^,³, KANG Xue²^,³()

^1.School of Environment and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, China
^2.School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, Shanxi, China
^3.Dezhou Industrial Technology Research Institute of North University of China, Dezhou 253000, Shandong, China

Received:2022-10-17 Revised:2022-12-26 Online:2023-09-15 Published:2023-09-28
Contact: KANG Xue

摘要/Abstract

摘要：

设计了大功率UV-LED散热和纳米TiO₂光催化酸性红26耦合系统，采用污水循环冷却UV-LED提高灯珠工作效率的同时实现污水光催化降解脱色，将污水循环系统与紫外光源冷却耦合是创新点。采用模拟优化UV-LED灯珠排布，以污水脱色为探针反应，发现污水冷却能使UV-LED结温降低41.2%，平均辐照度和污水脱色效率分别提高11.03%和1.68倍。环境因素对污水降解性能影响结果表明，光催化活性与污染物浓度成反比，与催化剂初始浓度成正比，达0.75g/L后趋于稳定；考虑吸附和氧化基团对降解速率影响，最优pH为2。本设计与传统环隙式反应器对比，表观量子产率和脱色效率分别是后者的2.3倍和4.3倍，能耗仅为后者的9.1%。该耦合系统在UV-LED的温度控制和废水处理领域具有潜在应用价值。

关键词: 大功率UV-LED, 优化设计, 散热性能, 光催化, 废水

Abstract:

In this paper, a coupling system of high-power UV-LED heat dissipation and nano TiO₂ photocatalysis acid red 26 was designed. The sewage was circulated to cool UV-LED, which could improve the working efficiency of lamp beads and realize the photocatalytic degradation and decolorization of sewage. The combination of ultraviolet light source cooling and sewage circulation system was the innovation of this paper. The layout of UV LED lamp beads was simulated and optimized. With wastewater decolorization as the probe reaction, it was found that wastewater cooling could reduce the junction temperature of UV-LED by 41.2%, the average irradiance and wastewater decolorization efficiency were increased by 11.03% and 1.68 times, respectively. The results showed that the photocatalytic activity was inversely proportional to the pollutant concentration. It was proportional to the initial concentration of catalyst and tended to be stable after reaching 0.75g/L. Considering the influence of adsorption and oxidation groups on the degradation rate, the optimal pH value was 2. Compared with the traditional annular reactor, the apparent quantum yield (AQY) and decolorization efficiency of the coupling system were 2.3 times and 4.3 times, respectively, and the energy consumption was only 9.1%. The coupling system had potential application value in the field of UV-LED temperature control and wastewater treatment.

Key words: high-power UV-LED, optimal design, heat dissipation performance, photocatalysis, waste water

中图分类号:

O657

王晨, 白浩良, 康雪. 大功率UV-LED散热与纳米TiO₂光催化酸性红26耦合系统性能[J]. 化工进展, 2023, 42(9): 4905-4916.

WANG Chen, BAI Haoliang, KANG Xue. Performance study of high power UV-LED heat dissipation and nano-TiO₂ photocatalytic acid red 26 coupling system[J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4905-4916.

图/表 19

图1 TracePro模拟得到的UV-LED配光曲线和商家提供的UV-LED配光曲线

图2 三种UV-LED排布方式示意图

图3 辐照度测量探头位置示意图（1、2、3、4、5、6表示探头位置）

图4 UV-LED阵列辐照度实测示意图

图5 耦合系统装置流程图

图6 均匀排布密排UV-LED阵列在铜基板上排布图

图7 传统光催化反应器实验装置示意图

图8 不同排布方式的辐照度仿真结果

表1 不同排布方式仿真结果分析

排布方式	辐照度最大值/W∙m^-2	辐照度平均值/W∙m^-2	均匀度/%
均匀排布	416.68	178.68	65.06
五边形排布	442.99	179.79	64.08
二三形排布	603.65	180.24	37.54

图9 三种排布方式的实际辐照度对比

图10 有无冷却条件下温度分布及UV-LED阵列平均结温

图11 UV-LED阵列实测辐照度

图12 不同冷却条件下的污水降解曲线

图13 不同冷却条件下降解动力学曲线

图14 AR 26初始浓度对光催化降解性能的影响

图15 TiO2初始浓度对光催化降解性能的影响

图16 pH对光催化降解性能的影响

图17 两种光催化系统的污水降解性能对比

图18 两种光催化系统降解动力学对比

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大功率UV-LED散热与纳米TiO₂光催化酸性红26耦合系统性能

Performance study of high power UV-LED heat dissipation and nano-TiO₂ photocatalytic acid red 26 coupling system

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