Drying tower demister resistance
Thread Content
After one year of operation of a new unit installed by our company, the pressure difference across the demister in the drying tower increased to 10 Kpa; the air delivery capacity of the main fan declined significantly, and the system could not achieve an adequate load. The demister uses Brink metal mesh; what are some good designs for air filters?
There is a problem with the purification process, which has caused the demister in the drying tower to become clogged. Rinse the mesh block when parking.
Metal wire mesh mist eliminators need to be cleaned regularly; after a year of operation, they will definitely get clogged.
What purification process is being used? Generally, this phenomenon should not occur with power waves; it is necessary to enhance the effectiveness of the purification in order to avoid such issues.
The sulfur-based acid production plant does not have a purification system; it only has an air filter.
The mist eliminator used in the drying tower – depending on the manufacturer – we have been carrying out modifications on it for a few days now, and the pressure drop has decreased significantly while efficiency has also increased greatly.
The resistance of the wire mesh demister in the drying tower of sulfuric acid production units generally does not rise to 10 kPa. It is estimated that during the start-up and shutdown of the unit, the sulfur injection valve was not closed in time; as a result, liquid sulfur in the higher pipes entered the furnace and turned into sulfur vapor, which then condensed in the wire mesh demister of the drying tower to form solid sulfur, thereby causing an increase in resistance.
Check whether the metal mesh of the air filter is damaged, whether the gaskets are sealed properly, or if there is a high level of dust in the surrounding environment; the dust content can be measured at the fan outlet.
A bag filter is installed at the inlet of the drying tower, and it performs well.