Experiments were conducted in a fluidized bed with I.D.of 81?mm and height of 1600?mm to investigate NO x emissions from incineration of waste water,which contains hexamethylenediamine of 4.5% and dilute HNO 3 of 1.25%.The result shows that decomposition products of dilute HNO 3 water solution are NO and NO 2.NO is the main product,which represents more than 90% of total NO x.The conversion ratio of HNO 3 converted to NO x is about 95%～96%.The results of incinerating organic waste water in a temperature range from 800?℃ to 950?℃ shows that,under non-staged combustion condition,the de-NO x ratio is only about 46%～61% at oxygen concentration of 11%.Staged combustion was adopted to further decrease NO x emission.The experimental data indicate that the NO x emission can be reduced very efficiently,the de-NO x ratio is increased up to 86%-93%.It was found that the presence of hexamethylenediamine is positive for reduction of NO x emission.950?℃ is the optimal operation temperature for incineration of the examined waste water,concerning the NO x reduction.
Aim To separate high purity linolenic acid from the oil of Lithospermumerythrorhizon growing in the Northeast of China. Methods Urea inclusion and column chromatographywere used. Results Unsaturated fatty acid was separated, with a purity of 99.30 wt% of linolenicacid. Conclusion The experiment shows excellent reproducibility and high feasibility for industrialproduction.
