CAJ | 학술논문

湿式静电除尘技术收尘极表面的易腐蚀和水膜均布问题是影响该技术连续可靠运行的重要因素。针对这两个问题，对碳素钢冷轧成型板进行了抗腐蚀保护层和在保护层基础上黏附不同附加亲水层的改性。使用称重法和平面成像法进行了单股流布水不同Reynolds数下不同改性表面持液量、表面流量、成膜率、水膜平均厚度等润湿特性的研究。结果表明：抗腐蚀保护层降低基材的润湿特性，附加亲水层中台丽碳纤维布的持液量较基材碳钢表面增加1.0～2.2倍，细沙粒成膜率比基材碳钢增加50%～60%，水膜厚度均在0.3～0.7 mm之间（最大达1.4 mm）；玻璃纤维布黏附在环氧树脂表面的疏松程度直接影响表面的润湿特性，涂刷第3层环氧树脂后自然晾晒12 h，120℃加热1 h后敷设玻纤布，自然冷却至固化得到的表面润湿特性最佳，其持液量可达0.014～0.021 g·cm?2，临界饱和时间＜3 min，实现完全润湿，成膜率较基材增加34～40倍；改性材料表面布水参数：喷水孔间距≥10 cm、Reynolds数超过2000，此时表面液膜为波动层流，可获得理想冲刷效果。
습식정전제진기술수진겁표면적역부식화수막균포문제시영향해기술련속가고운행적중요인소。침대저량개문제，대탄소강랭알성형판진행료항부식보호층화재보호층기출상점부불동부가친수층적개성。사용칭중법화평면성상법진행료단고류포수불동Reynolds수하불동개성표면지액량、표면류량、성막솔、수막평균후도등윤습특성적연구。결과표명：항부식보호층강저기재적윤습특성，부가친수층중태려탄섬유포적지액량교기재탄강표면증가1.0～2.2배，세사립성막솔비기재탄강증가50%～60%，수막후도균재0.3～0.7 mm지간（최대체1.4 mm）；파리섬유포점부재배양수지표면적소송정도직접영향표면적윤습특성，도쇄제3층배양수지후자연량쇄12 h，120℃가열1 h후부설파섬포，자연냉각지고화득도적표면윤습특성최가，기지액량가체0.014～0.021 g·cm?2，림계포화시간＜3 min，실현완전윤습，성막솔교기재증가34～40배；개성재료표면포수삼수：분수공간거≥10 cm、Reynolds수초과2000，차시표면액막위파동층류，가획득이상충쇄효과。
The erosion of dust collection electrode and distribution of water film are the main factors affecting stability and reliability in successive operation of wet electrostatic precipitators (WESP). To address these problems, modification of carbon steel made by cold rolling was made to provide corrosion protective coating and additional water affinity. The surface wetting characteristics of various modified anode plates were investigated under single strand feed water condition. The influence of Reynolds number on surface wetting characteristics of optimum modified plate was studied, aiming at providing theoretical foundation of rinse water distribution of WESP. Corrosion protective coating had negative impact on the surface wetting characteristics of substrate. With similar surface wetting characteristics, epoxy resin and glass fiber cloth Ⅰ had no effect on hydrophilic modification. The surface wetting characteristics of epoxy resin modified by sand, glass beads and glass fiber filament were similar and had little effect on hydrophilic modification. TL carbon fiber cloth had the largest liquid holdup of 0.0028—0.0054 g·cm?2, increased by 1.0—2.2 times compared with carbon steel sheet (CSS). Sand needed the least surface flow rate to wet the whole test sample, which was decreased by 36%compared with CSS; while sand had the largest film rate, increased by 50%—60% compared with CSS. The average thickness of water film was about 0.3—0.7 mm, and TL carbon fiber cloth could reach 1.4 mm. The degree of tightness of glass fiber cloth attached on the surface of epoxy resin depended on adhesion technology, which had direct effect on surface wetting characteristics. GFC series modification methods (GFCⅡ, GFCⅢ, GFCⅣ) had favorable effect on hydrophilic modification, and average thickness of water film was less than 0.35 mm. GFCⅢ, GFCⅣ surface could get wetted quickly, and critical time was shorter than 3 min. Surface flow rate of GFCⅡ, GFCⅢ, GFCⅣ could decrease by 94%—97% compared with CSS to wet the same size surface. Among them, adhesion technology Ⅲ had the best performance. The pitch of blowhole could be set as 10 cm or wider. Effective washing could be obtained, when the waves on the liquid film were fluctuating laminar at Reynolds number about 2000.