PROCESS AND DEVICE FOR DEGASSING A LIQUID IN A SUBSTANTIALLY CLOSED SYSTEM

摘要

Liquid to be degassed in a substantially closed system (50) is drawn by a circulation pump (1) into a degassing container (2) and returned therefrom to the closed system (50). The liquid is degassed by reducing the pressure in the degassing container (2) by interrupting the liquid feed while the circulation pump (1) is still running. The gas collecting in the upper part of the degassing container (2) is then discharged therefrom by raising the pressure in said container (2) by restoring the liquid feed. The gas released in the circulation pump (1) during its operation is taken to a degassing vessel (4) and the pump (1) is briefly stopped at given time intervals so that gas in the degassing vessel (4) is discharged therefrom via a vessel degassing valve unit (5). The liquid degassing process of the invention prevents the circulation pump (1) from filling with gas, thus greatly increasing its reliablity.