| 摘要 |
<p>Air is compressed in a positive manner using the high pressure water to be treated as the energy source. A measuring vessel (1) is first allowed to drain down under atmospheric or reduced pressure to waste (3) via a valve (2). High pressure water from a pump (7) is then admitted through a valve (6) and the air compressed and subsequently forced forward through a valve (8) to the point of use, which may be, for example, the absorber (10) of a dissolved air flotation plant. The cyclic draining and repressurisation may instead be controlled by a three-way valve. Whichever valve arrangement is adopted it can be operated automatically by a timer, or by level probes in the measuring vessel. <IMAGE></p> |
