Multi-opening chemical injection device

A fluid mixing device comprising a plurality of nozzles connected to an inlet port for receiving a fluid and directing the fluid to the plurality of nozzles, and connected to an outlet port, wherein each of the plurality of nozzles has a longitudinal axis substantially parallel to a main direction of fluid flow and each of the plurality of nozzles comprises:

• a converging chamber comprising an inflow portion for receiving fluid from the inlet port and an outflow portion, a diameter of the inflow portion being greater than a diameter of the outflow portion, the converging chamber comprising a substantially frusto-conical shape;
• at least one chemical injection port connected to the outflow portion of the converging chamber, and each adapted for delivering a chemical agent to the converging chamber,
• a diverging chamber comprising an inflow portion and an outflow portion, a diameter of the inflow portion of the diverging chamber being smaller than a diameter of an outflow portion of the diverging chamber, the diverging chamber comprising a substantially frusto-conical shape;
• a nozzle throat in fluid connection with the outflow portion of the converging chamber and the inflow portion of diverging chamber, the nozzle throat having a diameter that is smaller than any other portion of the nozzle;
• and
• an adjustable self-opening valve disposed in the diverging chamber and adapted such that when a pressure across a surface of the adjustable self-opening valve substantially perpendicular to each axis is higher than a predetermined value, the adjustable self-opening valve opens,
• wherein each of the plurality of nozzles is adapted such that flowing the fluid through the mixing device produces a homogenous mixture of the fluid and the chemical agent in the diverging chamber.