BUBBLE LIFT SYSTEM AND BUBBLE LIFT METHOD

摘要

In a bubble lift system 10, a pressurized chamber 21 is provided at an upper end portion of a riser pipe 11, and applies a pressure to an upper portion inside the riser pipe 11 to suppress an increase in the volume ratio of bubbles to a fluid mixture rising inside the riser pipe 11 in a shallow water region. In this configuration, the upper end of the riser pipe 11 is not opened to the atmosphere but is inserted into the pressurized chamber 21 under a high pressure to thereby prevent expansion of the bubbles and gas. In addition, a deaerator 14 for discharging bubbles separated by a centrifugal force is also provided in a middle portion of the riser pipe 11 in a shallow water region to thereby make the bubbles distributed more evenly inside the whole riser pipe 11. Thus, provided are the bubble lift system 10 and a bubble lift method that are efficient and employable even in a deep water region.

主权项

1. A bubble lift system for lifting a solid substance or liquid substance on a water bottom or under the water bottom through a riser pipe to a vicinity of a water surface, the bubble lift system configured to inject a gas into a lower side portion of the riser pipe to cause the gas in a bubble form to rise, and, by making use of an effect that the bubbles produce by reducing the pressure of a fluid column inside the rise pipe, suck a to-be-lifted substance into the riser pipe at a lower end portion of the riser pipe and lift the to-be-lifted substance to a place above the water surface, characterized in that
a pressurized chamber is provided at an upper end portion of the riser pipe, and the pressurized chamber applies a pressure to an upper portion inside the riser pipe to thereby suppress an increase in a volume ratio of the bubbles to a fluid mixture rising inside the riser pipe in a shallow water region.