A METHOD OF PUMPING, A CONSTRUCTION FOR A PUMP AND APPLICATIONS THEREOF

摘要

The invention concerns a method for pumping a mixture of relatively large particles and liquid, such as water, through an inlet (4) and through a pipe (11) in a careful manner with regard to the particles. The method uses a pumping device including an ejector pump, where a drive fluid is pumped into the pipe in the pump direction. The procedure is characterized by the fact that the drive fluid is led to an inlet nozzle (6) by relatively high pressure that is transformed to speed / negative pressure or suction in a deceleration chamber (8) arranged adjacent to the inlet (4), whereby there will be a negative pressure in relation to the pressure in the liquid / particle mix that flows into the inlet (4). When liquid from the liquid / particle mixture flows into the deceleration chamber (8) through drainage holes / slots (5) in the inlet (4), the drainage holes / slots (5) having smaller dimensions than the particles in the liquid, the liquid from the deceleration chamber is then brought together with the liquid / particle mix and transported in the pipe for further treatment. The invention also concerns a pump construction, and the applications of it.