Black Liquor Slurry Fouling And Slagging Sintering Characteristics Of Industrial Furnaces Burning Pilot Study

The damage of paper-making black liquid and the limitations of the general treatments are reviewed. The CWS(coal-water slurry) is introduced into treating the black liquid. Yet, the sodium included in BLCWS(black liquor coal-water slurry) is amiable to bring about fouling and slagging in heat transfer surface. Slagging and fouling on boiler in thermal power plant not only decrease the boiler efficiency and the plant economy, but also are potensitial hazards of many safety accidents. In allusion to the problem of a strong tendency of slagging, the mechanisms of sintering, ash deposition and heat flux of BLCWS are analyzed and studied thoroughly and systematically.The sintering test results show BLCWS is in possession of very predominant sintering performance and accord with its slagging property. A probe based on the law Fourier is designed in this paper to investigate the dynamic changes of resultant heat flux when ash deposits on the heat transfer surface. The findings can provide important references and instructions for sootblowing operation optimization. The probes of SiC are used to simulate the ash deposition process so as to analyze and study the behavior and property of ash depositon. The results indicate that ash deposition has relation with the distribution of temperature and aerodynamic field and there is Fe enrichment phenomenon. The study on the particle sampling shows Na contributes to the formation of the inial layer in the process of ash deposition.The results of thermobalance experiment and industrial boiler application test show that the BLCWS has better property of kindling and burnout, and the contaminant emissions are far lower than the slurry-making coal.