Analysis of the causes of blockage in the ammonia-water channel inside the ammonia absorption refrigeration reboiler tubes?
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Analysis of the causes of blockage in the gas flow channels inside the ammonia absorption refrigeration reboiler tubes? A reboiler is a device that uses shifted gas to heat the ammonia water at the bottom of the ammonia absorption refrigeration distillation tower; ammonia water flows inside the tubes while shifted gas flows outside them. During this year’s major maintenance, it was found that the ammonia water channels were blocked, resulting in poor heat exchange performance of the reboiler. Attempts were made to clean them using a high-pressure cleaner (1500 Kgf/cm2), but cleaning was not possible. Eventually, drills were used to clear each tube one by one, and the process took 15 days. Please help analyze what substance the crystalline deposits might be
Where is ammonia water from? What you’re saying is strange; in the ammonia absorption refrigeration process, the ammonia solution should be very pure. Check what is bonded to the ammonia solution.*
How long has it been in use? It’s probably scale; ammonium bicarbonate is less likely to be the cause. Water quality issues are more probable – just like when boiling water, scale forms. If you use high-pressure cleaning, the problem will worsen!
It’s scale, I guess. Ammonia water is generally prepared using deionized water, so there should be no problem. This situation may be caused by substandard quality of the deionized water. Check the quality of the demineralized water.