Hot air stripping

T0029 Alternative Technologies for Waste, Inc., Detoxifier In Situ Steam/Hot-Air Stripping Unit... 

Prolonged soldering in confined spaces with restricted air circulation requires ventilation. A small duct fan is recommended for hot-wire stripping. Tefzel articles should not be exposed to welding conditions. 

Kinetics of suspension PVC are identical to the kinetics of mass PVC, both increasing in rate with conversion (90). After polymerization to about 80—90% conversion, excess monomer is recovered, the slurry is steam-stripped in a column to a residual monomer level of about 0.0001% (10 ppm), excess water is centrifuged off, and the resin is dried with hot air. 

Stripping.. ..Removal of the light gases from a liquid stream using a fractionator, evaporation, or passing steam or hot air through it. 

In the Toray process, the foamable sheet is expanded as it floats on the surface of molten salts and is heated from the top by infrared lamps. The mol-fen salt mixture consists of potassium nitrate, sodium nitrate, and sodium nitrite. The salt residues from the surface of the foam are blown off by hot air and stripped in water. The Toray process is suitable to produce cross-linked PP foam sheet as well as polyethylene foam sheet. In fact, Toray was the first one to produce commercial PP foam. ... 

Organic solvents, residual monomer and dimers (Sect. 2.2.5) are usually removed by vapor stripping during which an aqueous slurry of Nd-BR is obtained. BR is isolated from the slurry by appropriate dewatering screws prior to drying by hot air [82]. The final process steps of Nd-BR-solutions are not unique to Nd-BR. Therefore, these aspects are not addressed in this review. 

In the United States the Stengel process is used to produce anhydrous ammonium nitrate directly. In this process ammonia and 58% nitric acid are preheated with fresh steam and fed into a packed vertical tube reactor at 3.5 bar and 240°C. The mixture of NH4NO3 and steam is expanded into a vacuum in a centrifugal separator. After stripping with hot air, a 99.8% NH4NO3 melt is discharged onto a cooled steal belt, solidified and then broken up or granulated295. 

The oil-solvent mixture and the meal is stripped of the solvent to recover solvent-free oil and meal. The solvent-enriched meal is conveyed to vertical desolventizer where heat and vacuum facilitate removal of solvent vapors. Desolventizer contains trays with sweeping arms to agitate the meal for improved efficiency. Some plants purge the cake with steam to remove the solvent, whereas others use hot air, although application of vacuum is most common. The solvent oil miscella are stripped of solvent in a three-stage evaporator. The hexane is reused for the extraction of oil. 

Demonstration Results In Situ Steam/Hot Air Soil Stripping,... 

Either use a hot air blower (for paint stripping), or put the cup on a layer of aluminium foil in an oven at 120 °C and note the gradual shape reversion to a nearly-flat sheet (Fig. 1.16b). The thermoforming process involved the elastic stretching of a sheet of polymer melt, and this orientation was frozen into the cup when it cooled. On reheating, the plastic attempts to return to its original shape. 

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