关键词: 浮法玻璃熔窑, 玻璃液, 数值模拟, 流动特性, 澄清

Abstract: It is well known that the flow and clarification process of glass melt are critical to glass production control and product quality. To explore the flow characteristics and clarification process of glass melt in float glass furnace, the flow field and temperature distribution were studied. From a new perspective the numerical simulation of the flow and heat transfer process of glass melt were carried out for a glass tank under actual working conditions by using Ansys CFD software. In view of the simulation results on flow field and heat transfer of glass melt in float glass furnace, the temperature distribution and flow characteristics of glass melt in the furnace were analyzed and the clarification process of the bubbles in glass melt was further analyzed on this basis. It was found that along the furnace length, the temperature of the glass melt on the surface and at the bottom of the tank showed two mountain shaped distributions respectively, and the flow pattern of glass melt presented three large circulation flows in the tank. In the clarification section the forward and backward flow velocities of glass melt increased and then decreased. In the direction of tank depth from surface to bottom, the temperature of glass melt decreased in a gradient. At a depth of about 400 mm from the surface, the value of flow velocity was zero. After the hot spot, the flow above this surface flowed smoothly to the neck, and at the shortest time of 418 s. Within this time, bubbles larger than 1.2 mm in diameter can be eliminated before they reached the neck with the flow of glass melt, and whether the bubbles smaller than 1.2 mm in diameter can be eliminated or not needs further study on the pattern of bubble uplifting and changing.

Key words: float glass furnace, glass melt, numerical simulation, flow characteristics, clarification