Apparatus for obtaining biammonium phosphate

Apparatus for obtaining biammonium phosphate, comprising:

• a first tower operating as an effective tank of phosphoric acid, said first tower being connected to a phosphoric acid source and receiving therefrom the acid for biammonium phosphate production, said first tower having a bottom for collecting said acid;
• a saturator open to the atmosphere for free entry of air thereto, said saturator being provided with mechanically operated agitating means;
• a second tower operating as a washing tower provided with spraying means adapted to produce a rain of liquid therein;
• a first pipe connecting said first tower to said saturator, said first pipe receiving from said first tower an overflow of phosphoric acid from said first tower bottom;
• a second pipe provided with a pump, said second pipe connecting the bottom of said first tower to said spraying means of said second tower, in order to produce a rain of phosphoric acid therein;
• a third pipe connecting an upper portion of said saturator to an upper portion of said second tower;
• a fourth pipe with larger cross section than said first, second and third pipes connecting a lower portion of said first tower to a lower portion of said second tower;
• a fifth pipe connecting said saturator to a tank feeding ammoniacal solution to said saturator;
• an overflow pipe for exit from the saturator of biammonium phosphate solution produced within the saturator;
• and mechanical means adapted to produce a strong air draft from the atmosphere into said saturator and thence into said second tower via said third pipe and thence to said first tower via said fourth pipe and from said first tower into the atmosphere.