四流H型感应加热中间包控流装置设计

针对国内某特钢厂新上的四流H型双通道感应加热中间包,为改善中间包内流体流动状态,设计了倒八字型与V型两种控流装置。应用数值模拟的方法对两种不同控流装置下的中间包流场、RTD曲线、温度场进行了模拟。结果表明,倒八字型控流装置平均停留时间1 469.6 s,死区体积比5.83%,边部水口与中间水口的最大温差3 K;与V型控流装置相比,平均停留时间延长了41.9 s,死区体积相应降低了4.09%,边部水口与中间水口的最大温差减少了2 ℃。湍流抑制器+倒八字型控流装置设计能更好改善四流大方坯H型双通道感应加热中间包流体流动性。

Design of flow control device on 4-strand H-type double channels tundish with induction heating

Two flow control devices which are inverted eight type and V type weir were put forward in order to improve the characteristics of flow field in the new 4-strand H-type double channels tundish with induction heating in a special steel plant. The flow field, RTD curve and temperature field in tundish with different flow control devices were simulated by numerical method. The results show that the average residence time of the inverted eight type is 1 469.6 s, the dead zone volume fraction is 5.83%, and the maximum temperature difference between the edge nozzle and the middle nozzle is 3 K. Compared with the V-type flow control device, the average residence time is prolonged by 41.9 s, the dead zone volume fraction is correspondingly reduced by 4.09%, and the maximum temperature difference between the edge nozzle and the middle nozzle is reduced by 2 ℃. The design of turbulence suppressor + inverted eight flow control device has better flow control effect on the new 4-strand H-type double channels tundish with induction heating.