Research On Pollutants Emission Characteristics Of Erythromycin Expired Dregs And Bituminous Coal Co-combustion In Pulverized Coal Furnace

Using high-temperature co-firing pulverized coal power plants and disposal of hazardous waste technologies and practices is still in its infancy in China, lacking of co-disposal of environmental risks and control systems research. Therefore, carrying out environmental risk Control Technology for high-temperature power boiler disposed of hazardous waste is needed.Paper summarized the research progress of co-combustion hazardous waste at home and abroad in pulverized coal furance, analyzing the research present situation and deficiencies of hazardous waste co-combustion.Secondly, Selecting the large difference of the volatile matter of Erythromycin expired dregs and bituminous coal co-fired in drop tube furnace. First of all, using thermogravimetric-infrared analysis method to analyze the Erythromycin expired dregs with bituminous coal pyrolysis with few studies on domestic, combustion dynamics model and flue gas infrared characteristic.Results showed that Erythromycin expired dregs pyrolysis alone and co-pyrolysis process accord with Avrami-Erofeev equation ((Random nucleation and subsequent growth,n=4) model, but the bituminous coal’s three stages(Precipitation of volatile%Carbocoal state、Coke carbonized) of pyrolysis respectively in accordance with the Jander equation, the Avrami-Erofeev equation (n=4), Jander equation of three-dimensional diffusion (n=2) model; FTIR analysis indicated that main gas products of pyrolysis were some aldehydes, ketones, carboxylic acids, esters and other small molecules escape in addition to CO2、CO in residue pyrolysis alone and co-pyrolysis process.In the process of Erythromycin expired dregs and bituminous coal co-combustion, adding substance ratio is less than30%(included), the reaction stage kinetic model changes corresponding to this matter alone combustion kinetics model, while another material response model separate combustion reaction model is similar, but the reaction order changed, indicating the interaction of the combustion process in the presence of the two substances. Infrared analysis showed that, the Erythromycin expired dregs in mixture produce alcohols, aldehydes, ketones, carboxylic acids, esters and other organic compounds with melting and volatile above245℃; The temperature is above300℃, mainly produces CO2, CO gas in the combustion process. On the one dimension drop tube furnace for erythromycin expired liquid with bituminous coal combustion experiment, analyzing by Erythromycin expired dregs directly mixed with coal co-combustion in the process of NOx emission effect is the N content of the material itself, combustion temperature, and add the proportion of different and difference.Finally to summarize the full text, put forward the pulverized coal fired boiler of disposal of hazardous wastes’ kinds for furnace thermal properties (ignition and combustion, load state) and the influence factors of boiler operation (corrosion, heat, wear, etc.) and the corresponding control measures for accelerating rate、hazardous waste’s elements limit position、adding the hazardous wastes’ types, and experimental study on the next step should be done.