During the production process of coke ovens in coking plants, a large amount of dust will be emitted unorderly from the machine side, tail coke, CDQ and other locations. It is difficult to collect them. The composition is complex, and some of them contain the materials such as raw gas and coal tar. All of these make it difficult to handle. We have developed efficient collection methods and special improved bag dust collectors for treatment. At present, our company's main achievements include Furnace head Flue Gas de-dusting project of J Qian'an Jiujiang Coal Logistics Co.,Ltd and other projects.