新型环保绝缘气体C5-PFK的红外光谱特性及混合比检测方法研究

doi:10.3964/j.issn.1000-0593(2023)12-3794-08

Abstract
References
Related Citation (15)

Download: PDF (9306 KB)
Export: BibTeX | EndNote (RIS)

Abstract 1,1,1,3,4,4,4-heptafluoro-3-(trifluoromethyl)-2-butanone (C5-PFK) gas has attracted widespread attention at home and abroad due to its excellent electrical insulation properties and good environmental protection properties. Preparing high-precision C5-PFK mixed gas and accurately detecting the mixing ratio is conducive to the scientific demonstration of C5-PFK mixed gas and minimizes potential power hazards. The FTIR experiment, combined with the B3LYP method for spectral theoretical calculation, was used to study the infrared spectral absorption characteristics of C5-PFK gas. For CO₂ and micro-water gas that may exist in the test environment, the cross-interference analysis of spectral lines was carried out under the same conditions as temperature, pressure and optical path; The C5-PFK gas mixture ratio sensor was simulated and tested based on NDIR technology, and the overall design of the sensor hardware system was carried out. According to the output characteristics of the sensor, a BP neural network temperature compensation model is established, and the repeatability and indication error of the sensor are tested. The results show that the strong absorption peak positions of C5-PFK gas are 1 200, 1 262 and 1 796 cm^-1, respectively, and the molecular theoretical calculation agrees with the gas's measured infrared spectrum. Under the background of synthetic air, the absorbance of CO₂ gas at 1 262 cm^-1 position is 6.04×10^-7, the influence factor of micro water peak area in 150 nm filter bandwidth is about 3.15×10^-3, and the cross-interference of spectral lines can be ignored. It is feasible to realize mixing ratio detection at a 1 262 cm^-1 position. The range tracks the optical path, and the sensor simulation test results show that the 6.5 mm optical path can realize the detection of the C5-PFK mixture ratio of 0~15%. The output characteristics of the sensor show that the value of the absorption variable SA/SB decreases with the increase in temperature, showing a nonlinear relationship. The maximum indication error of 10% C5-PFK/Air mixture before and after temperature compensation by the BP neural network algorithm is 29.23% and 1.29%, respectively, and the output absorption variable SA/SB value remains unchanged after compensation. The sensor repeatability test shows that the RSD is 0.27%, less than 3%. The linear fitting coefficient R² of the sensor indication corresponding to different concentrations is 0.999, and the maximum indication error is 2.47%. In summary, the advantages of the detection method and its sensor in the detection range of C5-PFK gas mixture ratio, anti-interference ability and reliability are verified, and a feasible solution for detecting the mixture ratio of C5-PFK gas mixture electrical equipment is provided.

Key words：1, 1, 1, 3, 4, 4, 4-heptafluoro-3-(trifluoromethyl)- 2-butanone; Infrared spectral characteristics; NDIR technology;Dual wavelength infrared difference;Simulation test; Sensor output characteristic; Temperature compensation

Received: 2022-10-16 Accepted: 2023-04-10

ZTFLH:

O657.3

Corresponding Authors: ZENG Xiao-zhe E-mail: zengxiaozhe9@126.com

Cite this article:

LI Xiao-dian,TANG Nian,ZHANG Man-jun, et al. Infrared Spectral Characteristics and Mixing Ratio Detection Method of a New Environmentally Friendly Insulating Gas C5-PFK[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3794-3801.

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2023)12-3794-08 OR https://www.gpxygpfx.com/EN/Y2023/V43/I12/3794

[1] TANG Feng, LIU Shun-gui, LÜ Qi-shen, et al(唐峰，刘顺桂，吕启深，等). Acta Photonica Sinica(光子学报), 2019, 48(10): 193.
[2] YAN Xiang-lian, HE Jie, HUANG Yin, et al(颜湘莲，何洁，黄印, 等). High Voltage Engineering(高电压技术), 2022, 48(7): 2688.
[3] LI Xing-wen, DENG Yun-kun, JIANG Xu, et al(李兴文，邓云坤，姜旭，等). High Voltage Engineering(高电压技术), 2017, 43(3): 708.
[4] Li Yi, Zhang Xiaoxing, Xiao Song, et al. Industrial & Engineering Chemistry Research, 2018, 57: 5173.
[5] TANG Nian, HE Shu-kai, ZENG Xiao-zhe, et al(唐念，赫树开，曾晓哲，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2021, 41(10): 3099.
[6] ZHANG Bo-ya, LI Xing-wen, ZHOU Yong-yan, et al(张博雅，李兴文，周永言，等). High Voltage Apparatus(高压电器), 2022, 58(4): 1.
[7] LIN Qi-ming, DENG Yun-kun, ZHAO Su, et al(林启明，邓云坤，赵谡，等). High Voltage Apparatus(高压电器), 2018, 54(5): 56.
[8] DENG Jun-bo, DONG Jun-hao, CHEN Jun-hong, et al(邓军波，董俊豪，陈俊鸿，等). High Voltage Engineering(高电压技术), 2022, 48(2): 661.
[9] ZHOU Zhen-rui, HAN Dong, ZHAO Ming-yue, et al(周朕蕊，韩冬，赵明月，等). Transactions of China Electrotechnical Society(电工技术学报), 2021, 36(2): 407.
[10] Li Yalong, Zhang Xiaoxing, Wang Yi, et al. Journal of Materials Science: Materials in Electronics, 2019, 30(21): 19353.
[11] HE Shu-kai, WANG Guo-jiang, FAN Jing, et al(赫树开，王国江，樊靖，等). Analytical Instrumentation(分析仪器), 2018, 6: 37.
[12] ZHU Hui, QI Ru-bin, ZENG Xiao-zhe, et al(朱会，齐汝宾，曾晓哲，等). Chemical Reagents(化学试剂), 2021, 43(1): 89.
[13] LI Ya-long, ZHANG Xiao-xing, WEI Zhou, et al(李亚龙，张晓星，卫卓，等). Transactions of China Electrotechnical Society(电工技术学报), 2022, 37(8): 2117.
[14] ZHANG Shi-ling, LI Jing-wei(张施令，李京伟). High Voltage Apparatus(高压电器), 2019, 55(7): 158.
[15] Liu Wei, Zhao Yue, Zhang Yin, et al. Journal of Molecular Spectroscopy, 2021, 381: 111521.
[16] Baasandorj Munkhbayar, Marshall Paul, Waterland Robert L. The Journal of Physical Chemistry A, 2018, 122(19): 4635.
[17] TAN Qiu-lin(谭秋林). Infrared Gas Sensor and Detection System(红外光学气体传感器及检测系统). Beijing: Machinery Industry Press(北京: 机械工业出版社), 2013.
[18] TANG Xi, YE Zhi-xiang, REN Yan-ming, et al(唐喜, 叶志祥, 任雁铭, 等). High Voltage Apparatus(高压电器), 2019, 55(2): 97.
[19] DU Jing-yi, YIN Cong, WANG Wei-feng, et al(杜京义，殷聪，王伟峰，等). Optical Technique(光学技术), 2018, 44(1): 19.