Abstract
ABSTRACT Coal spontaneous combustion is one of the important factors affecting coal mine safety production. However, the numerical simulation of coal spontaneous combustion influence factors is mostly carried out by gas concentration, using chemical equation to simulate has higher accuracy. In this paper, a temperature-programmed experiment investigating low-temperature oxidation based on small-scale coal samples was performed, and an one-step chemical reaction equation for coal low-temperature oxidation was established. Then, SIMTEC was used to conduct a numerical simulation of the equation, the simulation results are compared with the experimental results to verify the accuracy of the simulation. Finally, the effects of different porosity, wind speed and heating rate on low temperature oxidation of coal were simulated. The results show that when the temperature is lower than 398.15 K, the O2 consumption rate as well as CO and CH4 production rates change slowly and then change rapidly when the temperature exceeds 398.15 K. The porosity and inlet flow rate of the coal samples were positively correlated with the O2 consumption rate and gas production rate, O2 consumption rate and production rates of CO and CH4 increase with increasing inlet flow rate and decrease with increasing heating rate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
