As a lightweight refractory, the application of ceramic fiber module has laid the foundation for energy-saving lining of industrial furnaces. China began to develop and use ceramic fiber module as lining in high-temperature kiln. It is a relatively mature masonry technology, and is widely used in fire resistance, thermal insulation and energy-saving projects
Compared with traditional refractory materials, such as firebrick and refractory castable, ceramic fiber modules have certain advantages. Firebrick and refractory castables are of great weight and heat storage, and require drying and simultaneous interpreting after construction. Ceramic fibers are of small density, light weight, low thermal conductivity, low thermal capacity, strong thermal shock resistance, easy construction and no need of baking. It is widely used in metallurgy, petroleum, chemical industry, machinery, electronics, construction, light industry and other industries. It is most used as furnace lining in petrochemical industry
1： Main structure of ceramic fiber module furnace lining
At present, ceramic fiber module is the main lining structure of ceramic fiber used in heating furnace of oil refining and chemical plant
The formation process of the composite furnace lining structure is as follows: firstly, the furnace wall steel plate is cleaned and derusted; Then, the furnace wall steel plate shall be subject to anti-corrosion treatment; Thirdly, setting out shall be carried out according to the design requirements to determine the position of anchor nails; Fourth, weld anchor nails according to the setting out position; Fifth, lay ceramic fiber blanket as backing; Sixth, install the ceramic fiber module, align the central hole of the ceramic fiber module with the welded anchor nail, use a special socket wrench to go deep into the module along the central hole sleeve of the ceramic fiber module, and tighten the nut on the anchor nail; Seventh, after all ceramic fiber modules are installed, cut off the module packaging binding belt and take out the protective plate on the side of the module; Finally, flatten the module surface for forming. The module installation process is shown in Figure 1, which is the installation diagram of ceramic fiber module,
There are two types of composite furnace lining structure composed of ceramic fiber modules and ceramic fiber backing, namely, mosaic type and platoon type. Mosaic type is that the adjacent ceramic fiber modules are installed in 90 ° staggered arrangement along the folding and compression direction. After all installation, after cutting the binding belt, the gap between ceramic fiber modules is filled by expansion and rebound in different directions, Final forming. As shown in Fig. 2 (a). Due to the production dimensional error of ceramic fiber module and uneven expansion of edges and corners, the corners between modules are easy to form gaps and become a dead center that is not easy to deal with, as shown in Fig. 2 (b)
Therefore, the application of mosaic structure is relatively few. The soldier row type is that the ceramic fiber modules are arranged and installed in sequence according to the folding compression direction, and the gap between the two rows of modules in the non folding compression direction is filled with folded and compressed ceramic fiber blanket to compensate for shrinkage. Its structure is shown in Figure 3. At present, this structure is most used
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