A method for humidifying fine particles of coking coal: Agglomeration characteristics and dust dynamics analysis

The chemical agglomeration technology can effectively remove fine particles during coking coal loading and unloading. Aiming at the traditional agglomerator has the high price and secondary pollution problems, the new method of viscosifying fine particles was established. The fine particles were contacted with the soap solution through the cyclone circumfluence to increase viscosifying and agglomerate. The regulation and control of uniform humidification of whole particles were studied, and the relations among humidification, agglomeration, dust suppression and agglomeration conditions of fine particles were discussed. By establishing the agglomeration model and mechanical model, the influence of agglomeration on the force and velocity distribution of particles was analyzed based on CFD. The results showed that the soap solution has a strong effect on agglomeration of particle size less than 0.5 mm. The adsorption and flocculation of the polymer chain in the soap can promote the agglomeration of the fine particles. In the area of vortex formed by swirling air, with the mass addition ratio of soap powder increases from 5% to 15%, the coating efficiency of fine particles increases from 82% to 96%. The agglomeration results show that the average concentration of the fine particles decreases by nearly 20% finally. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The chemical agglomeration technology effectively removes fine particles during coking coal loading and unloading, reducing the average concentration in the end. The soap solution has a strong agglomeration effect on particles smaller than 0.5 mm, increasing the coating efficiency of fine particles.