The Research On The New Control Methods Of The Black Smoke From The Industrial Coal-burning Ceramic Kiln

The fuel of most industrial ceramic kilns depends on coal in China. During the burning of the industrial coal-burning ceramic kilns, much black smoke whose main component is carbon black made grave air-pollution. And old flue dust treatment technologies have some defects, which have efficiency so low for fine carbon black that they can't reach the objective to remove black smoke completely. Aiming at carbon black characteristics, a new method of controling the black smoke from the industrial coal-burning ceramic kilns by wetting is brought forward in this paper.From the producing mechanism of black smoke, this paper puts forward that smoke removal is primary in the treatment. The carbon black properties of physics and chemistry are deeply studied. Carbon black, which has fine, low density and large specific surface area, is spherical hydrophobe particle with a layer of oil-like matter on the surface. Based on the study of the physics and chemistry properties, experimental scheme of carbon black removal is established.Due to the hydrophobe surface, carbon black is difficult to be wetted. However, a little of surfactant added into water will improve the hydrophile greatly between water and carbon black. After consulting date, some better surfactants are selected out. According to the properties of physics and chemistry of carbon black, we carried out the mixture of the inorganic compound and anionic surfactant, cationic and anionic surfactants, nonionic and anionic surfactant. On the basis of experimental results and refering to the HLB of the surfactants, we selected SDBS, AEO-9, TX-10, CTAB, Na2SO4 to do orthogonal experiments. According to the results, Walker experiments are carried out for the better directions. Two better directions are selected from experiments: l.OSDBS + 50Na2SO4+ 0.05TX-10 (mmol/1) & l.OSDBS + 50 Na2SO4 + 0.03 AEO-9 (mmol/1). Aiming at the two directions, we have done the simulation experiments of the carbon black absorption. Experimental results indicate 1 .OSDBS + 50Na2SO4 + 0.05TX-10 (mmol/1) is the best. On the conditions of experiment, efficiency of dust removal is beyond 90%.Finally, according to experimental results and practical status, a set of industial application draft is put forward. And the outlook and benefit are also simply analysised.