In recent years, the furnace life of kiln has increased rapidly, which requires that the cooling water jacket can be used for 15 years in continuous operation process.
The biggest problem of electrode water jacket lies in the process of electrode propulsion. According to the electrode propulsion design, it is generally required to be promoted once every 3 months at the earliest and once every 7 years at the least, such as in the float furnace designed by FIC. The difference of propulsion time is so great, which is mainly determined by the type of glass, melting rate, especially the propulsion design structure. The electrode water jacket is usually damaged in the process of propulsion, mainly because the cooling water needs to be turned off in order to propel the electrode, so that the overall temperature of the water jacket rises and the solidified glass near the water jacket softens to achieve the purpose of propulsion. Almost all electrode water jackets are made of heat-resistant stainless steel, which needs to withstand the high temperature of 1100℃. However, after pushing the water jacket, the biggest problem appears in the re-entry of water into the water jacket. Because the temperature of the front end of the water jacket is as high as 1100℃, cooling water needs to be added very slowly to prevent damage caused by huge temperature difference. However, because the kiln operators are already hot and tired in the process of electrode propulsion, they hope to finish the work as soon as possible, and the water is often not slow enough in the actual operation.
Obviously, the cooling water is injected too fast and causes thermal shock, but the time that has been delayed in the process of propulsion will also cause damage to the water jacket if it is not advanced in time. Once thermal shock occurs, the water jacket weld will crack or block the water jacket, which will cause permanent damage to the water jacket, thus causing splashing and waste of cooling water. Because most propulsion systems are about vertical electrodes now, the water loss flowing to the ground is very high, which leads to electrode drilling or changing electrode position. This is a work that needs in-depth study and is expensive.
Experts of Baisheng glass engineering design tell us that when the electrode is advanced, the imported cooling water will produce hot steam which is not easy to be observed after reaching the high temperature part of the water jacket, and it is easy to burn the operators nearby. In any case, cooling water still needs to be introduced slowly, and some companies use air cooling systems to ease this process. With the passage of time, the cooling water jacket is closed, and even if treated water is used, it will be blocked slowly, and finally the cooling water stops running, so sputtering cooling has to be adopted. Sometimes the counter-flow of cooling water may also remove the blocked water jacket, and another solution is to inject citric acid. If the cooling water flow in the water jacket decreases, citric acid injected into the system can reduce the chance of water jacket being blocked. When congestion occurs, some companies control the cooling circuit by opening another independent waterway. FIC developed a replaceable independent waterway, and later developed into multiple independent waterways.
To sum up, the water cooling coil is the core of these standard water jacket systems, which not only absorbs the heat at the front end of the water jacket, but also absorbs the heat around the water jacket. This also leads to heat absorption from refractories and star cracks. Some suppliers have recognized this problem and wrapped insulating materials around the water jacket to reduce its influence. FIC invented a new water jacket as early as 20 years ago, which overcame all the above shortcomings.
The above is the detailed introduction of how to use the glass furnace reasonably, which Nanjing Baisheng Glass Technology Co., Ltd. introduced for you in detail. Baisheng Group also has more glass furnace technical services. Welcome to call the hotline or visit the official website for further understanding.