Float Glass Improve Thermal Efficiency And Energy Efficiency
Float glass melting furnace and other flat glass melting furnace compared to the structure is not much difference, is a shallow pool of horizontal flame pool kiln, but the scale said that the size of float glass melting furnace is much larger, the current world Float glass melting furnace melting up to a maximum of 1100t or more (usually 1000t / d said). Float glass furnaces and other flat glass furnaces are different, but their structures are in common. Float glass furnace structure includes: feeding system, melting system, heat supply system, waste heat utilization system, exhaust gas supply system.
The pond is located at the beginning of the furnace and is a rectangular pond that protrudes out of the kiln and the kiln pool. Feeding mouth, including the feeding pool and the upper retaining wall (front face wall) in two parts, with the material from the feed into the kiln.
Feeding is one of the important processes in the melting process. It is related to the melting speed of the batch, the hot spot position of the melting zone and the stability of the bubble boundary, which will affect the quality and yield of the product. As the float glass melting furnace is larger, the use of horizontal flame pool kiln, the pool is located in the melting pool at the front. The size of the feed pool varies with the size of the melting tank, the state of the batch, the way of feeding, and the number of feeders. The material is determined by the choice of feeding machine, there are spiral, ridge type, roller type, reciprocating type, wrapped into the type, electromagnetic vibration Type and oblique blanket and so on.
1 - small furnace; 2 - regenerator; 3 - lattice; 4 - bottom flue; 5 - Unicom flue; 6 - flue; 7 - fuel nozzle
(Currently more use of ridge feeding machine and oblique blanket feeding machine)
(1) the use of ridge feeding machine feeding pool size The use of ridge feeding machine feeding pool width depends on the number of selection of feeding machine, the length of the pool can be based on the layout of the process and the front wall structure requirements to determine.
(2) the use of oblique blanket feeder feeding pool size tapered blanket feeder is currently in the market has reached a common use, and its feeding method and ridge-type feeder is similar, but the feed surface than the ridge feeding machine to be wide And therefore the size of the pond is not much different in size than the size of the pond with the ridge feeding machine, and still depends on the width of the melting tank and the requirements of the feeding surface. With the glass melting technology is mature and the melting process is updated, the width of the float glass furnace is increasing. Because the heat absorbed by the batch is proportional to its coverage area, the wider the feed pool, the greater the coverage area of the batch, the more conducive to improving the thermal efficiency and energy saving, which is conducive to improving the melting rate. Therefore, the current large-scale float glass furnace design, are used to feed pool and melting pool isometric and quasi-equal width mode. With the increasing width of the feeding pool, large-scale inclined blanket feeding machine also came into being, melting pool and feeding pool width are 11m in the furnace, the use of two oblique blanket feeder to meet the production and technical requirements.
The melting part of the float glass melting furnace is the part where the melt of the batch is melted and the liquid is clarified and homogenized. The melting section is composed of the melting zone and the refining zone before and after the upper and lower part. The upper part of the space is also known as the flame space, from the front face wall, glass surface, kiln top of the arch and the kiln wall surrounded by the wall filled with flame; lower pool kiln by the bottom of the pool and the composition of the wall. In other words, the function of the melting zone is that the batch material is chemically and chemically reacted to form a glass liquid at a high temperature, and the function of the refining zone is to completely and completely discharge the bubbles in the molten glass to the desired amount of the glass liquid required for production.