Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, People's Republic of China.
Sichuan Engineering Lab of Non-metallic Mineral Powder Modification and High-value Utilization, Southwest University of Science and Technology, Mianyang, People's Republic of China.
J Air Waste Manag Assoc. 2021 Sep;71(9):1055-1066. doi: 10.1080/10962247.2020.1860157. Epub 2021 Jul 27.
Sintered plastic filters are recently favored in industrial filtration systems because of their advantage of high filtration precision and long service life. In order to embody experimental characterization of pulse-jet cleaning of sintered plastic filters, tests were concluded on a self-made pulse-jet cleaning experimental platform. The cleaning characteristics of sintered plastic filters were investigated with varied pulse-jet parameters of tank pressure, nozzle diameter, and jet distance (the distance between nozzle and filter opening). The relationship between pressure distribution and pulse-jet cleaning parameters was established. The results showed that peak positive pressure on the corresponding sintered plastic filter inner wall increased with the increasing tank pressure. With the increasing jet distance, peak pressure first increased, then decreased, and with the increasing nozzle diameter, the optimum jet distance decreased gradually. At the optimum jet distance, the peak pressure with a nozzle diameter of 6 mm was the best, which was confirmed through the jet flow photographed by schlieren. The mathematical model obtained by curve fitting was s = (d - a)/2. These results indicated that there was a direct relationship between the peak pressure and the parameters of pulse-jet cleaning in a sintered plastic filter. It provided theoretical support and application foundation for industrial dust-cleaning design. Sintered plastic filter is a new generation of high efficiency dust collector. Generally, its characteristics can be divided into three major categories as follows. 1) In terms of materials, the sintered plastic filter is made of PE substrate and coated with PTFE membrane, which makes it have stable chemical properties and can be used in high humidity, high oil, and other special situations. 2) In terms of dust cleaning, sintered plastic filter has high dust-cleaning efficiency of ultra-fine dust because of the unique membrane, which is not only limited to the surface of the filter plate, but also penetrates into the interior of the interstice. 3) In terms of structure, the sintered plastic filter is a rigid wavy porous structure filter of nine cavities formed by special sintering process of polymer material. This filter elements of integrated rigid design make its physical structure strong, not easy to deform and damage, and with a longer service life than traditional filters (bag filters and pleated fabric filter cartridges). In order to embody experimental characterization of pulse-jet cleaning of sintered plastic filters, tests were concluded on a self-made pulse-jet cleaning experimental platform described in this article. The cleaning characteristics of sintered plastic filters were investigated with varied pulse-jet parameters of tank pressure, nozzle diameter, and jet distance (the distance between nozzle and filter opening). The relationship between pressure distribution and pulse-jet cleaning parameters was established. These results indicated that there was a direct relationship between the peak pressure and the parameters of pulse-jet cleaning in a sintered plastic filter. It provided theoretical support and application foundation for industrial dust-cleaning design.
烧结塑料过滤器最近在工业过滤系统中受到青睐，因为它们具有过滤精度高和使用寿命长的优点。为了体现脉冲喷气清洁烧结塑料过滤器的实验特性，在自制的脉冲喷气清洁实验平台上进行了测试。通过改变罐压、喷嘴直径和喷气距离（喷嘴与过滤器开口之间的距离）等脉冲喷气参数，研究了烧结塑料过滤器的清洁特性。建立了压力分布与脉冲喷气清洁参数之间的关系。结果表明，相应的烧结塑料过滤器内壁上的正向峰值压力随罐压的增加而增加。随着喷气距离的增加，峰值压力先增加后减小，随着喷嘴直径的增加，最佳喷气距离逐渐减小。在最佳喷气距离下，喷嘴直径为 6mm 的峰值压力最佳，这通过纹影拍摄的射流得到了证实。通过曲线拟合得到的数学模型为 s = (d - a)/2。这些结果表明，烧结塑料过滤器中的峰值压力与脉冲喷气清洁的参数之间存在直接关系。它为工业除尘设计提供了理论支持和应用基础。烧结塑料过滤器是新一代高效除尘器。一般来说，它的特点可以分为以下三大类。1）在材料方面，烧结塑料过滤器采用 PE 基体和 PTFE 膜涂层制成，使其具有稳定的化学性能，可用于高湿度、高油等特殊情况。2）在除尘方面，由于独特的膜，烧结塑料过滤器对超细粉尘具有很高的除尘效率，不仅限于滤板表面，而且渗透到间隙内部。3）在结构方面，烧结塑料过滤器是一种由聚合物材料特殊烧结工艺形成的九腔刚性波浪多孔结构过滤器。这种集成刚性设计的滤芯使其物理结构坚固，不易变形和损坏，使用寿命比传统过滤器（袋式过滤器和褶式织物滤芯）长。为了体现脉冲喷气清洁烧结塑料过滤器的实验特性，在本文所述的自制脉冲喷气清洁实验平台上进行了测试。通过改变罐压、喷嘴直径和喷气距离（喷嘴与过滤器开口之间的距离）等脉冲喷气参数，研究了烧结塑料过滤器的清洁特性。建立了压力分布与脉冲喷气清洁参数之间的关系。这些结果表明，烧结塑料过滤器中的峰值压力与脉冲喷气清洁的参数之间存在直接关系。它为工业除尘设计提供了理论支持和应用基础。
