ã€ä¸çŽ»ç’ƒç½‘】 1. Glass furnace bubbling technology
Glass jar furnace bubbling technology, in the 80s to 90s, due to the limitations of bubbling and production technology has not been fully opened, with the advancement of science and technology, in recent years, the construction of glass furnace has been widely used in bubbling technology, pulse drum The foam technology is popular in the glass industry for its foam stability, uniform properties, improved melt capacity and reduced energy consumption.
2. The basic functions of bubbling are:
Effectively control, strengthen and improve the convection of the glass liquid in the furnace, enhance the heat exchange and physical and chemical reactions of various materials in the furnace, and improve the melting, clarification and homogenization efficiency during the melting process of the glass liquid.
3. The working principle of bubbling:
Adding a bubbler to the glass furnace can effectively improve the quality of the glass and reduce energy consumption.
The clarification principles are as follows:
Through the glass foam region, the decomposition gas of the raw material melting is rapidly discharged, and a large number of undischarged small bubble groups remain in the glass liquid, and the refluxed glass liquid is precipitated after the second temperature rise, and the glass liquid forms a microbubble high-density vitreous body at a high temperature hot spot. Increasing the melt clarity temperature increases the bubble float rate of more than 0.2 mm in diameter and promotes gas discharge, but it is difficult to eliminate floating bubbles of less than 0.2 mm in diameter. When the solution itself cannot absorb bubbles, the glass is finished with microbubbles. The form exists, leading to defects in glass quality.
During the cooling of the glass liquid, due to the combination of the glassy molecular chains, the vitreous body will attract the oxygen in the bubbles, and the partial pressure of oxygen in the bubbles will decrease. The partial pressure of other gases will upward, destroying the hydraulic equilibrium of the original gas, and melting other gases. Into the glass, in the cooling, the oxygen in the bubbles are competing with each other, the other gas partial pressure is raised, melted into the vitreous until the bubbles disappear.
In the clarification process, the two stages of large bubble discharge and small bubble fusion are indispensable. The former requires a certain temperature and duration, and the latter requires a certain temperature gradient. If the bubble is used, the reduction is reduced. The amount of small bubbles, the absorption of small bubbles eliminates the quality and quantity will be improved.
Bubbling is the process of blowing intermittent gas into the hot spot at the bottom of the kiln. By utilizing the composition and partial pressure difference between the blown gas and the gas in the vitreous, the gas in the vitreous body can be quickly absorbed, thereby reducing the residual gas content in the glass and reducing the generation rate of the microbubbles, thereby achieving clarification of the glass finished product. purpose.
Homogenization: Bubbling is the process of blowing air into the kiln floor and forming large bubbles in the glass. Large bubbles have a lot of buoyancy. During the rising of the bubble, the molten glass will be stirred vigorously to make the composition of the molten glass uniform.
energy saving effect:
(1) Due to the increase in the rising speed of the molten glass driven by the bubbling gas, the convection speed of the molten glass in the glass kiln is correspondingly increased, and the flow rate of the molten glass from the hot spot to the inlet is increased, which accelerates the speed of the underlying material.
(2) The strong absorption of gas in the glass by bubbling can reduce the energy consumption by appropriately reducing the clarification temperature.
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