Used 70,000 TPY Expandable Polystyrene (EPS) Plant. In the process styrene is polymerized in a water suspension at increased temperature. A blowing agent, pentane, is added in the process. Chemicals are added for controlling the suspension as well as reaction process. Flame-retardant chemicals are added for certain grades Depending on grades produced the ratio between pentane and styrene could differ, but as â€œ a rule of thumbâ€ 930 kg styrene and 70 kg pentane is used to produce 1000 kg EPS. The EPS beads, formed in the polymerization and produced in a batch, range in size and have to be separated into fractions at a later stage.
The process is a batch process with 4 stainless steel reactors equipped with agitators and heating and cooling coils. Following the reactor the so formed beads are passed over to a buffer tank into the continuous post-treatment part starting with the drying section and the screening part.
We can arrange to provide a full set of process flow sheets and can jointly with engineering partners to provide detailed engineering flow sheets and full support for erecting a plant.