First of all, one of the core judgment criteria is the peak temperature of cold blowing. The outlet temperature of the cold blowing stage should reach above 120℃, which is the sign of the overall regeneration effect of the bed. If the peak value reaches the standard, it indicates that the heat has fully penetrated the bed, realizing comprehensive regeneration.
Secondly, the regeneration process parameters control is also very critical. Need to ensure that the regeneration gas flow, temperature, time and so on in line with the process design, such as regeneration temperature is usually controlled at 200-350 ℃, time needs to be sufficient to ensure that the desorption is complete.
In addition, the performance during the adsorption cycle can be observed. For example, monitor whether the carbon dioxide and moisture content is stable, if the regeneration is not complete, these indicators will rise in the later stages of the work. Also, abnormal temperatures of air out of the molecular sieve may indicate regeneration problems.
Regeneration temperature profile analysis is also an effective method. The temperature curve can determine the temperature trend of the heating and cold blowing stage. If the cold blowing peak meets the requirements, it indicates that the regeneration is complete.
Finally, adsorption efficiency testing can also provide a basis for judgment. Although the direct test is complicated, it can be indirectly evaluated by comparing the adsorption amount or effective working time of the molecular sieve before and after regeneration.
In summary, to determine whether the molecular sieve heating regeneration is thorough or not, it is necessary to synthesize the information from various aspects, such as the peak cold blowing temperature, the process parameter control, the performance during the adsorption cycle, the regeneration temperature curve analysis, and the adsorption efficiency test.
