Dry vacuum system

industrial

Vacuum technology plays a special role in Gneuss‘ melt degassing processes. Not only is the reliable, process-constant and energy-saving generation of the required vacuum important, but also the separation of foreign substances or water from the degassed vapours. Depending on the specific requirements, different partial pressure drops are needed. As it is inevitable that monomers, oligomers or other solid components or sublimates are sucked in during polymer degassing, the use of efficient separation systems is essential to protect the pumps. Due to their large surface area, OMNI MRS extruders can in most cases operate at an absolute pressure of 25 mbar. This allows the use of robust water ring pumps, which generate the vacuum by means of a rotating impeller running in a liquid ring. Water ring technology eliminates the need for additional separation systems; gases and volatiles are condensed and released into the process water stream. The circulating liquid is cleaned by a belt filter, minimising maintenance of the entire system. The combination of the water ring pump and the belt filter means that even sticky monomers and oligomers, or even hard impurities and foreign matter, cannot damage the system. The circulation of process water generates heat which must be removed by a heat exchanger. Thanks to the intelligent design of the robust Gneuss vacuum system, the heat exchanger can be easily cleaned during operation if necessary.