Abstract

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$\text{tan}\frac{0.37275d^2-1.33545d+35.95005}{2}$. 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.

摘要

烧结塑料过滤器由于其高过滤精度和长使用寿命的优势，最近在工业过滤系统中受到青睐。为了体现烧结塑料过滤器脉冲喷射清洗的实验特性，在自制的脉冲喷射清洗实验平台上进行了测试。通过改变储罐压力，喷嘴直径和喷嘴距离（喷嘴与过滤器开口之间的距离）的脉冲参数，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射清洗参数之间的关系。结果表明，相应的烧结塑料过滤器内壁上的峰值正压随罐压力的增加而增加。随着射流距离的增加，峰值压力首先增加，然后减小，并且随着喷嘴直径的增加，最佳射流距离逐渐减小。在最佳喷射距离下，喷嘴直径为6 mm的峰值压力最佳，这是通过schlieren拍摄的喷射流确定的。通过曲线拟合获得的数学模型为：s =（d-a）/ 2$\text{棕褐色}\frac{0.37275d^2-1.33545d+35.95005}{2}$。这些结果表明，在烧结塑料过滤器中，峰值压力与脉冲喷射清洗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。