Nitrogen pulse jet cleaning of the pleated filter cartridge clogged with adhesive hygroscopic dusts
Nitrogen pulse jet cleaning of the pleated filter cartridge clogged with adhesive hygroscopic dusts
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DOI：
10.1016/j.psep.2020.08.045
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发表时间：
2021-03-01
影响因子：
7.8
通讯作者：
Zhang, Mingxing
中科院分区：
文献类型：
--
作者：
He, Chunhong;Yan, Cuiping;Zhang, Mingxing
折叠式滤芯广泛用于工业生产中，以控制颗粒排放并回收有价值的颗粒物质，其中脉冲喷射清洁是过滤器再生的主要方法。然而，对于聚丙烯酰胺（PAM）等强吸湿性和粘性粉尘，在脉冲喷射清洁过程中，压缩空气在喷嘴处形成低温区，并将水释放到环境中，导致颗粒在吸收水分后粘附在过滤器上，导致过滤器再生无效。因此，需要更高的清洗压力或其他方法来清洗过滤器表面。本文提出了一种利用干气喷射收集粘附性粉尘的方法，并通过中试验证了其可行性。用氮气代替压缩空气喷射源，系统压降曲线表明氮气对褶皱式滤筒表面粘附性粉尘的剥离具有良好的性能。这突出了清洁压缩空气中的水分含量对被粘性吸湿颗粒堵塞的过滤器再生的影响。从而验证了氮气喷吹的可行性，为今后工业上系统研究吸附性粉尘的捕集提供了依据。(C)2020年由Elsevier B.V.代表化学工程师学会出版。
The pleated filter cartridges are widely used in industrial production to control particulate emissions and recover valuable particulate matter, where pulse jet cleaning is a major method for filter regeneration. However, for strong hygroscopic and adhesive dust such as Polyacrylamides (PAM), during pulse-jet cleaning the compressed air forms a low temperature zone at the nozzle and will release water to the environment, causing the particles to adhere on the filter after absorbing moisture, resulting in ineffective filter regeneration. Therefore, a higher cleaning pressure or other methods are required to clean the filter surface. In this article, we have proposed a method to collect adhesive dust using dry gas injection and verified its feasibility through pilot experiments. The compressed air injection source was replaced with nitrogen, the curve of system pressure drop shows that nitrogen has good performance in the peeling of adhesive dust from the surface of the pleated filter cartridge. This highlights the effect of the moisture content in the cleaning compressed air on the regeneration of filters clogged with adhesive hygroscopic particles. Therefore, the feasibility of the nitrogen injection was validated, which provides a basis for the future systematic research of industry to collect adhesive dust. (C) 2020 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers.