FIELD: proportioning chemical reagents in oil collecting systems and waste water utilization. SUBSTANCE: proportioning unit includes chemical reagent reservoir, delivery pump with suction and discharge pipe lines for medium being handled. Unit is additionally provided with device for introducing chemical reagents which is fitted in suction pipe line of delivery pump. Inlet of unit is connected with delivery pipe line of delivery pump and outlet of chemical reagent proportional pump. Device for introducing chemical reagent is made in form of mixer or acoustic oscillation generator. EFFECT: enhanced efficiency due to reduced consumption of chemical reagents and enhanced corrosion protection. 3 cl, 1 dwg
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