Automated batch blending system for liquid fertilizer

A mixing system for the production of liquid products, comprising

• a mixing hopper for receiving constituents of a product;
• means continuously measuring the weight of product in said hopper;
• a first manifold for receiving product constituents and discharging said constituents into said hopper;
• a plurality of constituent input lines leading to said first manifold;
• an input control valve in each said input line for regulating the flow of constituent material to said manifold;
• a mixing hopper outlet connected to said mixing hopper;
• a recycling loop connected between said mixing hopper outlet and the interior of said mixing hopper, said recycling loop including a second manifold;
• pump means connected between said mixing hopper and said second manifold, a recycling flow line connected between said second manifold and the interior of said mixing hopper, and a recycling valve in said recycling flow line;
• a venturi loop having an inlet end connected to said pump means and a discharge end connected to said first manifold, said venturi loop including a venturi jet, an inlet product flow line connecting said pump means to said venturi jet, a venturi discharge line connecting said venturi jet to said first manifold, and a venturi control valve connected in said venturi loop;
• a product constituent inlet line having a corresponding control valve connected to said second manifold;
• and
• dry ingredient supply means connected to said venturi jet and responsive to the flow of product through said venturi jet to induct dry ingredients into said venturi for delivery to said mixing hopper, and a dry ingredient control valve connected between said dry ingredient supply means and said venturi jet.