Device for dispersing water-soluble polymers

A device for dispersing a water-soluble polymer in powder form having a standard particle size of less than 1 mm, comprising:

• a wetting chamber, into which the polymer is dosed, comprising a cylindrical upper part with a vertical axis of revolution extended by a conical lower part, said wetting chamber being further provided with:
• at least one opening formed in a thickness of a wall of the upper and/or lower parts, said opening emerging laterally into a connection to a primary water supply circuit,
• a cover provided with an opening formed in a thickness of a wall of said cover, said opening emerging into a connection to a source of powdered polymer,
• a chamber for grinding and discharging the dispersed polymer with a horizontal axis of revolution, said grinding chamber comprising:
• a rotor driven by a motor and provided with blades, said blades optionally being inclined with respect to the horizontal plane of the stator,
• a fixed stator in the form of a cylinder, in the wall of which a single row of vertical slot is cut over part of a height of said wall,
• over all or part of a periphery of the chamber, a ring fed by a secondary water circuit, the ring communicating with the grinding chamber so as to spray pressurized water onto the stator,
• an L-shaped tube connecting the wetting chamber to the grinding chamber, one end of which connects to the lower end of the wetting chamber and another end of which connects to an inlet of the grinding chamber,
• characterized in that the upper and lower parts of the wetting chamber and the L-shaped tube have an internal surface with an identical surface tension TS1, and in that the cover of the wetting chamber has an internal surface with a surface tension TS2 higher than the surface tension TS1 of the internal surface of the upper and lower parts of the wetting chamber and the L-shaped tube.