文献类型：期刊文献

英文题名：Research on the erosion analysis of continuous slag discharge pressure reducing devices in high-pressure gasifiers

作者：Yang, Guangrun[1];Zhao, Hui[1];Xu, Jianliang[1];Dai, Zhenghua[1,2];Liu, Haifeng[1,3]

机构：[1]East China Univ Sci & Technol, Minist Educ, Engn Res Ctr Resource Utilizat Carbon Containing W, Shanghai 200237, Peoples R China;[2]Xinjiang Univ, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830046, Peoples R China;[3]Liaoning Petrochem Univ, Fushun 113001, Liaoning, Peoples R China

年份：2025

卷号：37

期号：3

外文期刊名：PHYSICS OF FLUIDS

收录：;EI(收录号：20251218097108);WOS:【SCI-EXPANDED(收录号:WOS:001450480500024)】；

基金：This research was supported by the Key Research and Development Program of the Autonomous Region (No. 2023B01013).

语种：英文

外文关键词：Chemical industry - High pressure effects in solids - High pressure engineering - Orifices - Ultrasonic testing

摘要：High-pressure differential liquid-solid two-phase flow is widely used in the chemical industry, energy, and power fields. In this study, a multistage segmental throttling orifice pressure-reducing pipe was developed to address the bridging risk and erosion challenges associated with batch slag discharge in coal gasification. Ultrasonic technology was used to evaluate the erosion distribution inside the pipe and to establish the erosion mechanism. The research results demonstrate a rapid increase in the pressure drop of the pressure-reducing pipe with a rising flow rate, indicating its high-pressure drop characteristics. However, after the experiment was conducted for 30 h, the pipe failed at 5.56 m(3)/h operating conditions and the pressure drop performance of the pressure-reducing pipe was significantly decreased as erosion time increased. The pipe structure experiences severe deformation, expansion, and formation of pits due to impact, which exacerbated erosion and led to more complex erosion behavior.