An experimental study on the effects of temperature and pressure on negative corona discharge in high-temperature ESPs
作者： Pei Yan , Chenghang Zheng , Weizhuo Zhu , Xi Xu , Xiang Gao
DOI: 10.1016/J.APENERGY.2015.11.040
关键词:
摘要: High-temperature ESPs are proposed to improve energy efficiency and avoid damage downstream equipment in integrated gasification combined cycle pressurized fluidized-bed combustion. In this study, the effects of temperature pressure on negative corona discharge characteristics were compared. Gas varied from 373K 1073K, 30kPa 100kPa achieve same gas density. The additional current ΔIt induced by high was calculated, ion ΔIi electron ΔIe studied. A wire-type electrode, a spiral ribbon four compositions (N2/CO2/SO2/air) investigated plate-type configuration. Results show that increases more rapidly with increasing than decreasing at density is 0.87mA/m 973K atmosphere pressure, which higher 0.45mA/m 30.9kPa room temperature. An effect apart decrease as increases. because enhanced molecule kinetic ionization rate. electron-carried important temperatures above 873K. ΔIe/ΔIt 0 0.941 when 773K 973K. Compared wire electrodes, electrode significantly larger avalanche secondary emission. Negative does not occur N2, onset voltages following sequence: CO2>SO2 (6000ppm)>air, determined energy. ΔIt/IP smaller strong electronegativity.
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