After a long-term high temperature operation of the glass melting furnace, the refractory brick kiln lining and various equipment used have experienced different degrees of aging. In particular, the checker bricks of the regenerator were seriously damaged and blocked, which seriously affected the atmosphere in the glass melting furnace. This situation not only increases energy consumption, but also causes a large number of quality problems in the glass products produced. Therefore, hot repairing checker bricks is by far the most effective way.
1. Reasons for the damage of checker bricks in the regenerator
The role of checker bricks in the regenerator is mainly to recover a large amount of waste heat taken away during the glass melting process, thereby improving heat utilization and reducing energy consumption.
The furnace realizes the effective use of energy by changing the fire periodically. In this process, checker bricks repeatedly absorb and release heat, and their temperature rises and decreases accordingly, resulting in periodic fluctuations in the temperature of checker bricks. In addition, the long-term erosion of high temperature, smoke, dust, and alkaline volatile gases aggravates the checker brick’s Clogging, aging and then damage.
Second, the thermal repair process of checker bricks in the regenerator
1. Hot repair preparation
Before the hot repair, a specific hot repair plan must be formulated. Equipment, tools and checker bricks should be ready for use. At the same time of hot repair, the proportion of raw clinker should be adjusted, the drawing amount and the pressure in the kiln should be controlled, and the temperature should be controlled to ensure the normal production demand of the melting kiln.
2. Checker brick replacement
After opening the regenerator, the old checker bricks that have been worn out must be cleaned first. Pay special attention when dismantling old checker bricks. Due to the gradual reduction of heat storage and changes in the working conditions in the kiln, the fire should be controlled manually according to the situation and adjusted in time to ensure the hot spot temperature and ensure melting.
Stack new checker bricks. The lattice bricks of the regenerator are made of the same structure as the original lattice structure of the regenerator, mainly using clay bricks, magnesia-chrome bricks and high-purity magnesia bricks. Stack clay bricks, magnesia chrome bricks, and high-purity magnesia bricks from bottom to top. Seal the regenerator door and withdraw the water tank. Seal the water tank door.
After the checker brick replacement and door closing in the heat storage chamber are completed, reasonable heating operations and monitoring of the temperature in the heat storage chamber are very important. During the entire heating process, the principle of "slow temperature rise, no cooling down" should be followed.
3. The effect of thermal repair of checker bricks in the regenerator
After the checker bricks in the regenerator are thermally repaired, the heat in the regenerator is stable and the energy consumption is reduced. Glass defects and frying time due to material problems have been greatly reduced, and fuel consumption has been reduced.
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