The Numerical Simulation Research Of Thermal Processes In Combustion And Carbonization Chamber Of Coke Oven

Coke is the indispensable raw material in the high furnace smelt. It plays an importantrole in the high furnace, such as fever, revivification, carburizer and framework function. Thecoke quantity plays importance role to technique economic index sign and the businessenterprise performances in progress of smelt iron. The coke oven is both a high-temperaturechemical reactor and very large and complicated coking thermal equipment. With theincreasing demand for high quality coke, further study of internal thermal process in the cokeoven becomes more necessary. In the past studies, people usually achieved with a physicalmodel experiment. With the rapid development of computer science and technology,numerical simulation technology has matured, the use of numerical simulation to study theinternal thermal process of coke oven will save a lot of time and manpower and resources. Itcan largely meet the research needs and have a certain practical value and significance.In this paper, the research object is JN60coke oven, according to its structural features, acoupled thermal process numerical model of the carbonization chamber and combustionchamber of coke oven is established. It is solved by CFD. Through careful analysis of thecarbonization chamber heat transfer process, the time of which the temperature ofcarbonization chamber center meets the technical requirements was predicted, and thetemperature difference at the height direction is less than40℃. With a small relative error incomparison with the experimental data, the model agrees with the actual production and itsaccuracy is proved. Meanwhile, the flow field,temperature field and the concentration fieldare also analyzed. It is proved that waste gas recirculation can strengthen the mixing of gasand improve the temperature uniformity of the combustion at the height direction effectively.It helps to improve the quality of coke. Then based on the effects of the different moistureevaporation model, coal initial temperature, coal initial density and coal initial moisture tocoking process, the model is respectively calculated. The results show that the nonlinearevaporation model is more suitable for the coking process. The increase in initial temperatureand density and the decrease in the initial moisture can be conductive to the expansion ofcoking coal resources and improve coke production efficiency and the quality of coke.The research projects in this paper have certain reference value and practical significancefor the study of coke oven heating process and its optimization.