Qin Wenjun, Dekermenjian Manuel, Martin Richard J
Exponent, Inc., Los Angeles, CA, USA.
J Air Waste Manag Assoc. 2006 Aug;56(8):1177-83. doi: 10.1080/10473289.2006.10464541.
Loss of filtration efficiency in a fabric filter baghouse is typically caused by bag failure, in one form or another. The degree of such failure can be as minor as a pinhole leak or as major as a fully involved baghouse fire. In some cases, local air pollution regulations or federal hazardous waste laws may require estimation of the total quantity of particulate matter released to the environment as a result of such failures. In this paper, a technique is presented for computing the dust loading in the baghouse exhaust when one or more bags have failed. The algorithm developed is shown to be an improvement over a previously published result, which requires empirical knowledge of the variation in baghouse pressure differential with bag failures. An example calculation is presented for a baghouse equipped with 200 bags. The prediction shows that a small percentage of failed bags can cause a relatively large proportion of the gas flow to bypass the active bags, which, in turn, leads to high outlet dust loading and low overall collection efficiency from the baghouse.
织物过滤袋式除尘器过滤效率的降低通常是由某种形式的滤袋故障引起的。这种故障的程度可能小到针孔泄漏，大到整个袋式除尘器起火。在某些情况下，当地的空气污染法规或联邦危险废物法可能要求估算此类故障导致排放到环境中的颗粒物总量。本文提出了一种计算一个或多个滤袋出现故障时袋式除尘器排气中粉尘负荷的技术。所开发的算法被证明是对先前发表结果的改进，先前的结果需要关于袋式除尘器压差随滤袋故障变化的经验知识。给出了一个装有200个滤袋的袋式除尘器的示例计算。预测结果表明，一小部分故障滤袋会导致相对较大比例的气流绕过正常工作的滤袋，进而导致出口粉尘负荷高，袋式除尘器的整体收集效率低。
