Abstract Baghouse filters are widely applied in industrial gas cleaning, for example in waste incineration plants and the cement industry, to meet particle emission standards and for product recovery. The global particle emission of pulse-jet cleaned surface filters is typically monitored end of pipe (e.g. in the stack). Since the particulate matter emission of baghouse filters originates often from leaks and incorrectly installed or damaged filter bags, operators would greatly profit from online measurement technology that monitors the emission contribution of individual filter bags or at least a subset of all installed filter elements to the total emission. Low-cost particulate matter sensors can be deployed inside filter houses in larger quantities due to their compact design and low asset cost compared to conventional aerosol measurement technology. The ability of several low-cost sensors to detect the characteristic PM emission behavior of surface filters has been shown in previous investigations in a filter test rig. This study shows first results regarding the emission contribution of individual filter bags of a pilot plant scale baghouse filter employing distributed low-cost sensors of the model OPC-N3 from the manufacturer Alphasense. A Promo® 2000 aerosol spectrometer with a welas® 2100 sensor serves as reference regarding the particulate matter concentration detected by the low-cost sensors and as end of pipe measurement equipment to monitor the global emission. The selected filter medium was a membrane filter medium with sealed seams to provide low emission levels and defined conditions on the clean gas side. The employed low-cost sensors detect an emission peak right after cleaning of the corresponding filter bag only. The global emission measured in the clean gas duct consists of the overlay of the individual emission peaks detected locally at the corresponding filter bags. By exchanging one filter bag with a filter bag made from a non-membrane filter medium without sealed seams, an increase of the total continuous emission can be detected, both end of pipe in the clean gas duct and locally via the low-cost particulate matter sensor. This demonstrates the applicability of the measurement technology for the detection and identification of leaks and damaged filter bags that serve as emission hotspots in baghouse filters.

中文翻译：

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在应用分布式低成本颗粒物传感器的中试规模袋滤器中同时测量具有高时间分辨率的空间分辨颗粒排放

摘要 袋式除尘器广泛应用于工业气体净化，例如垃圾焚烧厂和水泥行业，以满足颗粒物排放标准和产品回收。脉冲喷射清洁表面过滤器的整体颗粒排放通常在管道末端（例如在烟囱中）进行监测。由于袋滤室过滤器的颗粒物排放通常来自泄漏和不正确安装或损坏的滤袋，因此运营商将从在线测量技术中获益匪浅，该技术监测单个滤袋或至少所有已安装过滤元件的一部分对总排放量的贡献排放。与传统的气溶胶测量技术相比，低成本的颗粒物传感器设计紧凑，资产成本低，因此可以在过滤室中大量部署。之前在过滤器测试台上的调查显示了几种低成本传感器检测表面过滤器的 PM 排放特性的能力。该研究显示了关于采用制造商 Alphasense 的 OPC-N3 型分布式低成本传感器的中试规模袋式除尘器过滤器的单个滤袋排放贡献的初步结果。带有 welas® 2100 传感器的 Promo® 2000 气溶胶光谱仪可用作有关低成本传感器检测到的颗粒物浓度的参考，并用作管道末端测量设备以监测全球排放。所选的过滤介质是具有密封接缝的膜过滤介质，以在清洁气体侧提供低排放水平和限定条件。所采用的低成本传感器仅在清洁相应的滤袋后立即检测到发射峰。在清洁气体管道中测量的全球排放量包括在相应过滤袋局部检测到的各个排放峰的叠加。通过将一个滤袋更换为由无密封接缝的非膜过滤介质制成的滤袋，可以检测到总连续排放量的增加，清洁气体管道中的管道两端以及通过低成本颗粒物局部检测传感器。