INFLUENCE OF AIRFLOW GUIDE COLUMN ON PULSE DUST-CLEANING IN CARTRIDGE FILTERS
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摘要: 常规滤筒集尘器在反吹清灰时,存在滤筒下部清灰能量过盛而上部清灰能量不足的现象,导致滤筒上部清灰不彻底而下部易破损。提出了在滤筒内部设置气流导柱,引导反吹气流,改善滤筒内部流场的方案。采用数值模拟与试验测试相结合的方法,对滤筒反吹清灰性能进行了分析。结果表明:内置气流导柱的新型滤筒反吹压力分布更加均匀,滤筒中下部冲击压强下降至原型滤筒的65%,解决了过喷吹问题,滤筒上部形成冲击压强尖峰解决了欠喷吹问题。同等工况下,内置气流导柱的新型滤筒相比原型滤筒拥有更长的使用寿命,预估使用寿命可达到普通滤筒的8倍。Abstract: Pulse back blow dedusting with conventional cartridge filters was found to be imbalanced in terms of energy allocation, with the lower and upper cartridge sections respectively getting excessive and insufficient energy apportionment, consequently causing not only the lower section to be more susceptible to damage, but also the upper section to be ineffective in dedusting. In light of this problem, the present study proposed fitting airflow-guiding columns within the filter cartridge to guide the reversely-blow airflow and improve the internal flow field. A series of numerical simulations and experimental tests were employed to determine how the cartridge fared in pulse jet cleaning. The results showed that the proposed column-fitted filter cartridge received more evenly-distributed reversely-blown pressure, as the impact pressure intensities at the middle and lower cartridge sections were reduced to 65% of that of the original cartridge, thereby rectifying the excessive blowing strength issue. At the same time, the proposed modification also generated a sharp impact pressure intensity peak at the upper cartridge section, which subsequently addressed the weak blowing strength issue. Furthermore, under unchanged working conditions, the proposed column-fitted filter cartridge also gained a service life that is 8 times longer than its conventional counterparts.
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[1] XAVIER S, DENIS B, SANDRINE C, et al. Consequences of high transitory airflows generated by segmented pulse-jet cleaning of dust collector filter bags[J]. Powder Technology, 2010, 201(1): 26-33. [2] 孙一坚, 欧阳莉, 杨昌智. 滤筒式除尘器及其应用[J]. 通风除尘, 1995(2): 26-28. [3] 胡家雷. 滤筒除尘器脉冲清灰系统的数值模拟研究[D]. 西安:西安建筑科技大学, 2017. [4] GEYSEN D, VANDECASTEELE C, JASPERS M, et al. Effect of improving flue gas cleaning on characteristics and immobilisation of APC residues from MSW incineration[J]. Journal of Hazardous Materials, 2006, 128(1): 27-28. [5] 杜柳柳, 沈恒根, 娄可宾. 袋式除尘器清灰过程的研究进展及分析探讨[J]. 建筑热能通风空调, 2007(5): 25-29,48. [6] 邱俊, 陈强, 李建龙, 等. 数值模拟滤筒中负载尘饼对脉冲喷吹清灰效果的影响[J]. 环境工程学报, 2021, 15(3): 1067-1074. [7] 易玉枚, 李显杰, 廖可兵, 等. 滤料脉冲喷吹清灰效果评价指标的试验研究[J]. 中国安全科学学报, 2014, 24(7): 135-139. [8] 巨敏, 张明星, 陈俊东, 等. 滤筒除尘器脉冲清灰动态分析[J]. 环境工程学报, 2013, 7(3): 1091-1094. [9] 陈路敏, 钱付平, 叶蒙蒙, 等. 脉冲喷吹清灰高湿粉尘剥落的数学模型研究[J]. 煤炭学报, 2019, 44(增刊2): 683-690. [10] 周福宝, 李建龙, 李世航, 等. 综掘工作面干式过滤除尘技术试验研究及实践[J]. 煤炭学报, 2017, 42(3): 639-645. [11] ANDERSEN B O,NIELSEN N F,WALTHER J H. Numerical and experimental study of pulse-jet cleaning in fabric filters[J]. Powder Technology, 2016, 291: 284-298. [12] 刘耀松. 工业滤筒除尘器清灰方法研究[D]. 西安:长安大学, 2017. [13] 周苗苗. 脉冲喷吹袋式除尘器清灰特性研究[D]. 绵阳:西南科技大学, 2018. [14] 杨燕霞, 张明星, 秦文茜, 等. 脉冲喷吹内置锥形滤筒的清灰性能[J]. 中国粉体技术, 2019, 25(1): 76-80. [15] 李慧芳. 新型滤筒除尘器的性能实验研究及工业应用[D]. 马鞍山:安徽工业大学, 2016. [16] 王丹丹, 钱付平, 吴显庆, 等. 袋式除尘器气流分布均匀性测试与数值模拟[J]. 安徽工业大学学报(自然科学版), 2013, 30(3): 343-349. [17] 胥海伦,周苗苗,张情,等.开口散射器对滤筒除尘脉冲清灰效果的影响[J].环境工程学报,2017,11(8):4647-4652.
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