邵振龙,王进卿,池作和,张光学.复合陶瓷涂层防高碱煤沾污性能研究[J].表面技术,2017,46(11):254-259.
SHAO Zhen-long,WANG Jin-qing,CHI Zuo-he,ZHANG Guang-xue.Fouling Resistance of Composite Ceramic Coating to High-alkali Coal[J].Surface Technology,2017,46(11):254-259 |
| 复合陶瓷涂层防高碱煤沾污性能研究 |
| Fouling Resistance of Composite Ceramic Coating to High-alkali Coal |
| 投稿时间：2017-07-30 修订日期：2017-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.11.035 |
| 中文关键词: 燃煤锅炉 高碱煤 复合陶瓷涂层 料浆法 沾污 表面能 |
| 英文关键词:coal-fired boiler high-alkali coal composite ceramic coating slurry method fouling surface energy |
| 基金项目:国家自然科学基金（51408574）；浙江省教育厅科研项目（Y201534242）；浙江省公益技术应用研究项目（2017C31043）；浙江省“仪器科学与技术”重中之重学科人才培育计划项目 |
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| Author | Institution |
| SHAO Zhen-long | School of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China |
| WANG Jin-qing | School of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China |
| CHI Zuo-he | School of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China |
| ZHANG Guang-xue | School of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China |
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| 中文摘要: |
| 目的 针对锅炉燃烧高碱煤时存在的沾污问题，研究复合陶瓷涂层防高碱煤沾污性能。方法 以水冷壁材料20G和过热器材料TP347为研究对象，采用料浆法在其表面制备复合陶瓷涂层，利用扫描电镜及能谱图观察分析实验后试样的微观形貌，对涂层的防Na2SO4、K2SO4、准东煤灰沾污性能进行研究。结果 烧结固化后的复合陶瓷涂层表面致密，与基材结合状态良好。经过120 h的Na2SO4、K2SO4、准东煤灰沾污实验后，未喷涂涂层的20G及TP347钢片试样表面沾污率分别为20.31%、13.33%、32.31%和 16%、10%、29%，而喷涂涂层的两种钢片试样表面沾污率分别为0.38%、0.26%、0.75%和0.26%、0.13%、0.39%，基本为零。未喷涂涂层钢片试样表面的片状氧化膜结构容易粘附一些细微的Na2SO4、K2SO4、准东煤灰颗粒，涂层表面的一些微裂纹也会使细微颗粒滞留在裂纹区域，这些细微颗粒难以被压缩空气吹扫清除。结论 复合陶瓷涂层隔绝了沉积物与钢材基体直接接触，自身具有较低的表面能和化学不亲和性，使沉积物不易粘附，具有一定的防高碱煤沾污能力。 |
| 英文摘要: |
| The work aims to solve fouling problem existing in boiler burning high-alkali coal by studying fouling resistance of composite ceramic coating to high-alkali coal. With water wall material 20G and superheater material TP347 as study objects, composite ceramic coating was prepared on the surfaces in slurry method. SEM and EDS were used to observe and analyze microstructure of the samples after experiment, and study fouling resistance of the coating to Na2SO4, K2SO4 and Zhundong ash. The surface of composite ceramic coating was dense after sintering and curing, and was well bonded to the substrate. After 120 h fouling test of Na2SO4, K2SO4 and Zhundong ash, fouling rate of uncoated 20G and TP347 steel sheet samples was 20.31%, 13.33%, 32.31% and 16%, 10%, 29%, respectively, and that of coated 20G and TP347 steel sheet samples was 0.38%, 0.26%, 0.75% and 0.26%, 0.13%, 0.39%, respectively, essentially 0%. Some subtle Na2SO4, K2SO4 and Zhundong coal ash particles might easily adhere to slice oxide film structure on the surface of uncoated sheet samples, some microcracks on the coating might also hold up fine particles in crack area. And the fine particles could hardly be removed by air blowing with compressed air. Composite ceramic coating prevented sediment from directly contacting with the steel substrate, exhibited lower surface energy and chemical incompatibility, thus the sediment was of low adhesivity and certain fouling resistance to high-alkali coal. |
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