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nature : also known as the prill tower. By sprayed with solution injected into tower. Solution charged droplets to the bottom of the course, because of the counter-current air flow vaporize the solvent was part of cooling, it is crystal formation. Crystal and liquor automatic outflow, or pumping out for further refining. Or high concentration solution sprayed from spray-income tower, the tower of cold air into the lower part (see figure). Solution droplets down to the bottom of the course, the cold air cooling and solidification into crystal particles. Urea Fertilizer Factory, ammonium nitrate crystals is made of this.
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