| 摘要 |
<p>A device (10) for injecting additive product into a liquid (18) comprises a lenght of conduit (12) having two end flanges (14) by which it is inserted in a piping (16) through which flows the liquid (18) in the direction of the arrow (20). Above the section of conduit (12), the device comprises a bell (22), the interior of which defines a chamber (24) in fluid communication with the conduit. A nozzle (26) for injecting additive products into the liquid (18) projects inside the chamber (24). In order to remove the nozzle (26) from contact with the liquid (18) and thereby avoid formation on or about the nozzle of insoluble salt deposits, the changer (24) is filled with a gaseous atmosphere under pressure in order to maintain the level (32) of the liquid in the chamber at a predetermined distance below the tip of the nozzle (26).</p> |
