Numerical Simulation Of Thermal Processes In A Coke Oven Chamber

Coke oven is the main equipment in coking industry，it is also acomplex thermal equipment. The coking process is a thermal processinvolving heat and mass transfer. The coking progress is researched by thesimulation of industrial production or the measurement of physical model forthe actual or test coke oven, this approach is complicated, sometimes isdifficult to achieve generalization and optimization purposes. Through theestablishment of mathematical simulation models, coking process modelingusing numerical simulation method can meet requirements. Therefore,in-depth study and simulation of the coke production process has realitysignificance and practical value.In this paper, the research object is JNDK55-05coke oven carbonizationchamber and consider the carbonization chamber interior is a unsteady stateheat transfer and mass transfer process. Using the numerical simulationsoftware (CFD), a coking thermal process model of the carbonizationchamber of coke oven is established. The model is calculated based on theheat transfer processes of coking, and also considers the process of coalpyrolysis, the formation and flow of raw gas, the change of coal porosity andother complex factors. A good prediction of the temperature field of coalmaterial, volatile precipitation, coke oven gas flow area changes are showed.At the same time, based on the different coal density, coal initial moisture,coal initial temperature, the model is respectively calculated. The resultsshow that coal preheating technologies, coal moisture control technologies,coal compacting process could improve the production efficiency.Based on the principle of conservation of mass and coal pyrolysisprocess, coking product yield prediction model is established. Withoutconsidering the secondary pyrolysis of coal, coal pyrolysis process isconsidered as a first order parallel reaction. With the small error incomparison with the experimental data, the model can well predict actualproduction of coking process.This research work can be applied to coke oven design, production operations, and computer control of coke oven.