| 摘要 |
PURPOSE:To suitably concentrate aerobic bacteria at low temp., by raising the temp. of a conc. recirculating solution by a low temp. large scale heat and using said recirculating solution in the humidifying action of air while again heating the cooled recirculating solution. CONSTITUTION:A solution to be conc. is supplied to a concn. tower 10 from a pipeline 12 and falls on a packed bed 11 from a distributor 13. The solution reaching the liquid sump 14 provided to the lower part of the tower is drawn out by a pump 20 and heated by a heater 30 to fall on the bed 11 from the distributor 15 provided above the packed bed 11. New air for concn. is sucked from a suction pipe 41 is heat-exchanged with high temp. and high-humidity used air in an indirect heat exchanger 50 to be raised in temp. and raised in pressure by a blower 43 to enter the concn. tower 10 through a louver blow-in port 17 and countercurrrently contacted with the solution falling from above during the rising through the packed bed 11 and lowered in its temp. through the heat exchange with new air to be exhausted to the open air. |
