Liquid Seal Technology And Simulation Research On Structure Optimization Of The Sinter Circular Cooler

As an important equipment of sintering mine production, the circular cooler is widely used in iron and steel enterprises. However, the sealing technology of circular cooler has little progress and the air leakage rate still keeps high, resulting in enormous waste of the power consumption of the blowers. Therefore, to explore a new sealing technology of circular cooler, and to study its mechanism by using the simulation software, has an important significance for saving energy, reducing consumption and improving the environment.This paper has summarized the research development of circular cooler and sealing technology, and the liquid seal technology has been applied in the dynamic seal of circular cooler. Then the new circular cooler equipment by using liquid seal technology has been introduced. Meanwhile, the air leakage rate of liquid seal circular cooler has been tested. Based on the theory of two-phase flow and the VOF method, the mathematical model of liquid seal has been established, and the simulation has been carried out by using FLUENT6.3. To reduce the fluctuation of liquid seal, four parameters affect the liquid seal operation has been optimized by using orthogonal experimental method. Finally, to suppress the liquid into the air duct, the liquid seal structure has been optimized.The main results of the paper are as follows:1) The air leakage rate of liquid seal circular cooler has been tested, the results show that the air leakage rate is only4.8%, significantly lower than the traditional circular cooler which the air leakage rate is30%.2) The model computing results have been compared with on-site test results, the maximum error is less than5%, which verifies the correctness of the model.3) By using orthogonal experimental method, the velocity in inlet, pressure in outlet, liquid level, initial wave height have been analyzed. These parameters can be listed as follows in the order of their effects on experimental results:initial wave height, velocity in inlet, liquid level, pressure in outlet. The optimum running conditions of the liquid seal are as follows:initial wave height0.02m, velocity in inlet15m/s, liquid level0.5m, pressure in outlet3300Pa.4) Different structure optimization schemes have been compared, the results show that the double baffle with hook, which width is0.06m, can effectively prevent the sealing liquid into the air duct.