| 摘要 |
<p>The device has a gas filter (4) arranged in a suction direction of a dosing pump (7), for switching off of the dosing pump via a switch-off control (4a), when the gas filter is filled with gas. A safety impulse damper (8) is arranged towards the dosing pump, for monitoring of pressure of extracted aqueous solution at an injection position (11). A by-pass line (12) surrounds the dosing pump, where the solution flows back from the safety impulse damper into the gas filter through the by-pass line, for refilling of the gas filter.</p> |
