Handbook of Solvents - George Wypych - ChemTech - Ventech!

1558 Denis Kargol
Figure 22.3.4. ASC-200 distillation plant in the explosion-proof
room.
Figure 22.3.5. Residue transferred to PE pail.
and thereby promotes evaporation of the
solvent. Finally, the solvent vapor reaches
a water-cooler tubular condenser provided
with a cooling water control unit. The condensed,
clean distillate is pumped from
here to the distillate tank. This tank has a
level control and now feeds the clean solvent
directly into the wash plant for a second
wash. The distillation process takes
place fully automatically and lasts about 2
days. Distillation of the bottom product takes place independently afterwards. After the residue
has been thickened to a predetermined viscosity, the equipment shuts down automatically.
The still is drained by means of a discharge valve at the bottom of the cone. The
200-300 kg of compact greyish residues are transferred to 20 completely empty 20 liter
plastic pails and then fed to an inexpensive solid waste incineration process. No further
cleaning operations are required at the plant so the stirred distillation unit is ready for use
again immediately.
The plant used at Kabe treats about 200 liters of solvent per hour. At about 200 tonnes
per year it is therefore being used to 60-70% of its capacity at present. Since its installation,
the distillation plant has been operating for 5 days per week with very little maintenance. A
few mechanics maintain the plant twice a year without external support.