Selection of refractory insulation materials for the lining of the quench tower
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How should the lining material for flue gas quench towers be selected? There are options that use cotton lining combined with acid-resistant castables, as well as combinations of lightweight refractory mortar and insulating refractory mortar. What are the differences between these options? How should the design, selection, and thickness calculation be carried out?
The design approach is as follows: First, check whether 1) the flue gas contains acidic gases, and 2) the process temperature after rapid cooling is higher than the dew point temperature. In the first case, where the flue gas contains acidic gases and the process temperature is above the dew point temperature, normal high-temperature resistant castables can be used based on the flue gas temperature. In the second case, when the flue gas contains acidic gases but the process temperature is below the dew point temperature, acid-resistant castables are generally required. In the third case, if the flue gas does not contain acidic gases, ordinary refractory materials can be selected depending on the temperature