Apparatus for activating silicic acid in water

An apparatus for activating silicic acid contained in water, comprising:

• a cylindrical tank having a central axis, a first end and a second end;
• a helical antenna disposed within the cylindrical tank coaxially along the central axis of the cylindrical tank;
• a high frequency power source that generates an oscillating electromagnetic field in the range of 150-450 MHz and is connected to the helical antenna;
• a water inlet pipe provided with a water injection pipe member positioned at a part of a side wall of and projecting into the cylindrical tank proximate the first end, the water injection pipe member having an axis parallel to a diameter of said cylindrical tank but positioned to a side of and parallel with the diameter so as to induce a swirling motion when water is introduced into the cylindrical tank;
• and
• a water drain pipe disposed at or proximate the second end of the cylindrical tank.

An apparatus for activating silicic acid contained in water, comprising:

• a cylindrical tank having a central axis, a first end and a second end;
• a high frequency power source having an output in the range of 150 to 450 MHz;
• a helical antenna disposed within the cylindrical tank coaxially along the central axis of the cylindrical tank, said helical antenna electrically connected to the high frequency power source and having a length that is a one of 1, 1/2 and 1/4 as long as the wavelength of the high frequency wave generated by the high-frequency power source;
• a water injection pipe member mounted at the first end of and projecting into said cylindrical tank, the water injection pipe member having an axis perpendicular to the central axis and being aligned such that an angle .theta. defined by a straight line between a point where the axis of the water injection pipe member intersects a wall of the cylinder tank and the central axis and a line along the axis of the water injection pipe member satisfies the limits:
• 0.degree.<.theta..ltoreq.90.degree.;
• a second portion mounted to the second end of the cylindrical tank;
• and
• a water drain pipe having an inlet substantially at the second end of the cylindrical tank.