How to address the deliquescence issue with solid feedstocks
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The process requires the addition of solid sodium hydroxide. Currently, after weighing, it is added manually. The Work Safety Supervision Bureau has requested that this be changed to automatic feeding. Sodium hydroxide has severe deliquescence; the use of a screw feeder was considered, but there is concern that deliquescence could cause blockages in the screw. Is there any better way?
A screw conveyor should be the best choice. As for deliquescence, it is necessary to appropriately address the issue of controlling its sources. Additionally, the auger isn’t prone to clogging either. For reference.
The choice of solid feeding method depends on whether the solid material is fed in one go or continuously How much is the input amount? And other factors like that. Generally, the emergency management agency will only require you to carry out feeding in a sealed manner ； Actually, there are quite a few options available; for one-time material charging, we can use discharge stations or vacuum feeders ； Continuous feeding, such as using a screw conveyor ； It still needs to be chosen based on your actual operating conditions. Avoid deliquescence; if feeding is done intermittently, there should be no major problems. If continuous feeding is employed and a controlled humidity environment cannot be maintained, then regular cleaning is the only option.