Lift loss reducing apparatus and lift loss reducing method

摘要

PROBLEM TO BE SOLVED: To provide a new lift loss reduction device advantageous to reduction of a lift loss to achieve a wide sewage collection range.SOLUTION: A lift loss reduction device 100 for feeding liquid flowing in from an upstream side vacuum pipe line 6 to a downstream side vacuum pipe line 10 installed at a position higher than the upstream side vacuum pipe line 6 includes: a water collection tank 7 for storing sewage flowing in from the upstream side vacuum pipe line 6; a suction pipe 3 having one end arranged within the water collection tank 7 and the other end connected to the downstream side vacuum pipe line 10; an atmosphere open valve 9 for communicating the water collection tank 7 with the atmosphere; an upper pressure take-out port 16 for taking out pressure of an upper portion of the water collection tank 7; a lower pressure take-out port 15 for taking out pressure of a lower portion of the water collection tank 7; and a controller 1 for opening the atmosphere open valve 9 by differential pressure between the pressure taken out by the upper pressure take-out port 16 and the pressure taken out by the lower pressure take-out port 15.