Working conditions of glass melting furnace regenerator lattice
The working environment faced by the glass melting furnace regenerator lattice is extremely harsh, and it must deal with multiple erosion and stress at the same time. Detailed analysis shows that its working conditions mainly include the following aspects:
First, the lattice is exposed to high-temperature alkali vapor and flue gas for a long time. These corrosive gases continue to chemically corrode the surface of the bricks, gradually weakening the structural strength of the material.
Secondly, the acidic and alkaline dust flying materials generated during the production process of the batch, as well as the harmful impurities entrained in the fuel, will cause physical and chemical double corrosion to the lattice in solid form, further accelerating the loss of materials.
In the condensation area, the formation of liquid sulfate will have a more direct erosion effect on the lattice. This liquid erosion method is more serious than gas and solid erosion, and the damage to the material is also faster.
In addition, due to the periodic reversal of the combustion air and flue gas, the lattice will experience drastic temperature changes. This alternation of hot and cold not only causes complex structural stress and thermal stress inside the material, but also may cause fatigue damage to the material, seriously affecting the service life of the lattice body.
At the same time, the oxidizing and reducing atmospheres in the regenerator will induce a series of chemical reactions, which may destroy the internal structure and crystal phase of the brick material, thereby reducing the overall performance of the material.
Finally, the bricks located at the bottom must also withstand the huge pressure from the upper bricks, and this continuous compressive stress will also pose a threat to the integrity of the material.
2. Reasons for damage to the lattice bricks in the regenerator
As a key component in the glass melting furnace, the core function of the lattice bricks in the regenerator is to efficiently recover the waste heat lost during the glass melting process, thereby improving the heat utilization rate and significantly reducing energy consumption. This design not only reflects the efficient use of energy, but is also an important measure for energy conservation and emission reduction in the modern glass manufacturing industry.
However, during the periodic fire-changing process of the melting furnace, the lattice bricks need to continuously absorb and release heat. This continuous temperature change causes periodic thermal stress inside the lattice bricks, which poses a serious threat to its structural integrity in the long run. At the same time, the high temperature environment, smoke and continuous erosion of alkaline volatile gases further accelerate the loss of checker bricks, causing them to gradually clog, age and eventually damage.
Especially after the glass melting furnace has been running at high temperature for a long time, various equipment including refractory brick kiln linings will age to varying degrees. The damage of the regenerator checker bricks is particularly serious. Its blockage problem not only affects the thermal environment in the melting furnace, but also directly leads to an increase in energy consumption. More importantly, this damage has a significant impact on the quality of glass products, and a large number of quality defects may occur.
In view of the above situation, it is particularly important to carry out regular thermal repair work on the regenerator checker bricks. This can not only effectively extend the service life of the checker bricks, but also ensure the stable operation of the glass melting furnace, thereby ensuring the quality of glass products. Therefore, from a professional point of view, the thermal repair of checker bricks is currently the most effective way to solve these problems.
3. Thermal repair of checker bricks in the regenerator of the glass kiln:
As an important part of the glass kiln, the performance and state of its checker bricks in the regenerator are directly related to the efficiency of heat recovery and the stable operation of the kiln. In order to ensure the efficient operation of the regenerator, we selected materials such as magnesia-chrome bricks, magnesia bricks and high-quality high-purity zirconium corundum bricks with strong alkali corrosion resistance. These high-performance materials can ensure that the checker bricks maintain excellent performance during a kiln period.
However, during the long-term operation of the kiln, the regenerator may still face some problems, the most common of which is that the nodules formed by the melting of powder materials block the grid body. In order to solve this problem, we need to perform professional thermal repair operations to ensure that the grid body is unobstructed.
During the thermal repair process, we mainly use two methods to remove powder nodules: mechanical removal and flame melting removal (also known as backburning). The mechanical removal method is to physically clean the grid body with professional tools, remove the blocked nodules, and restore the permeability of the grid body. The flame melting removal method uses a high-temperature flame to melt the nodules, so that they flow again and discharge from the grid body, thereby achieving the purpose of removing the blockage.
These two methods have their own advantages. The mechanical removal method is simple, fast and effective, and is suitable for mild blockages; while the flame melting removal method can more thoroughly remove stubborn nodules, but the operation difficulty is relatively high. In practical applications, we will choose the appropriate method to perform thermal repair operations based on the specific circumstances.
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