一种布置在ESP进口封头的微颗粒捕集增效装置研究和开发

Research and Development of Enhanced PM_(2.5) Collection Device Installed in the ESP Inlet Hood

微颗粒捕集增效技术是目前燃煤电厂PM2.5控制较为经济有效的技术之一,但适用场合有限。利用CFD软件,分析了电除尘器进口封头内三层多孔板对不同极性颗粒的掺混效果,分别计算了导流板、接电导流板、接电直板对不同极性荷电颗粒掺混的促进作用,并对其气流分布进行验证,开发出一种布置在电除尘器进口封头内的微颗粒捕集增效装置,并配置声波清灰。该技术已在国电谏壁电厂14号炉1 000 MW机组电除尘器上成功投运,提效程度显著。

Though limited by its application occasions, the PM2.5 collection enhancement technology is still one of the most economic and effective PM2.5 capture methods for the coal-fired power plants. With the CFD software, the effect of three-layer perforated plate in ESP inlet hood on different polarity particle mixtures is analyzed. Particularly, the effectiveness of turning vane, power-on turning vane and straight panel on different polarity particle mixtures are calculated respectively and the air flow distribution patterns are verified. In this way, the enhanced PM2.5 collection device installed in the ESP inlet hood is developed with sonic soot cleaning functionality equipped together. This device has been used successfully in the ESP of Guodian Jianbi Power Plant Boiler No.14, with 1 000 MW capacity. Significant improvement is observed in the application practice.