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| Numerical study on periodic work of a top combustion hot blast stove |
| ZHAO Chen-chen, CHEN Liang-yu |
| College of Mechanical Engineering and Automation,Northeast University, Shenyang 110819, Liaoning, China |
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Abstract Improving the hot blast temperature of the hot blast stove is of great significance for reducing energy and realizing economic green development. Taking a 2 500 m3 blast furnace hot blast stove as a prototype, a three-dimensional mathematical model of top combustion hot blast stove was established. Fluent software was used to carry out several continuous simulations of hot blast stove combustion and air supply under the operation of “two stoves blasting, one stove supplying air”. The realizable k-ε turbulence model, P-1 radiation model and eddy dissipation model were applied to simulate fluid flow, radiation heat transfer and chemical combustion, respectively. And on this basis, the influence of coke oven gas in different proportions on the temperature field and the hot blast temperature in the hot blast stove was further analyzed. The simulation results show that the temperature difference in the regenerator of the hot blast stove is 200 ℃ during these two working cycles, which is the heat absorbed by cold air in regenerator. Also, under this working condition, coke oven gas can increase the hot blast temperature by 20 ℃ when the mixing proportion is 1% and 2%, respectively.
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Received: 13 September 2020
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2021, Vol. 31 
