NORMAL OPERATION OF STRIPPING PHASE Three strippers are found in the stripping phase, which are called primary, secondary and tertiary strippers.
Each of them is equipped with agitation,
...as well as with two level control automatic valves,
...one valve for recirculating and one valve for transferring.
They also feature a dual centrifugal pumping system.
The stripping operation is about turning rubber solution into rubber crumb...
...and eliminating the remaining solvent contained in rubber.
This is done by bringing the rubber solution...
...into contact with hot water in presence of special additives.
In order to keep a desired liquid level in each tank,
...a low contercurrent flow low steam is fed...
...to the liquid sine of secondary and tertiary strippers.
As a result of the heating process in the secondary and tertiary strippers,
...a water / solvent vapors stream is generated which is led to the primary stripper,
...from where is removed out of the system through the dome.
Faceplates of the main control loops are found on DCS Delta V screen,
...which are basically flow, temperature, pressure and level control loops.
Finally, once the rubber crumb is totally formed in the tertiary stripper,
...it is transferred to the corresponding crumb tank to be fed to the finishing phase.