LIQUID REAGENT DOSING APPARATUS Russian patent published in 1994 - IPC

FIELD: measurement technology. SUBSTANCE: metered-out reagent passes through transducer 1 of flow rate of liquid reagent, membrane valve 6, metering orifice 21 and space 17 of differential pressure regulator 16, inlet duct 9, undervalve space 8, orifice 26, undervalve space 10 and outlet duct 11 of regulator 7 of flow rate of reagent, is mixed with pressure water in ejector 12 and is fed into main line 14 of purified water. In addition to slow additional control of concentration of liquid reagent in main line 14 of purified water through setting inlet 15 of regulator 7 of flow rate of reagent fast reaction to change of flow rate of reagent is carried out with the help of differential pressure regulator 16 by keeping constant difference of pressures of liquid in spaces 8 and 10 of regulator 7 of flow rate of reagent. EFFECT: saving of liquid reagent, improved accuracy and speed of response of dosing apparatus by stabilization of dosing parameters, enhanced reliability of apparatus, reduced dimensions and mass of it. 1 dwg