Production of high grade complex fertilizers containing diammonium phosphate as a pricipal component
阅读：568发布：2022-02-08
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1. A PROCESS FOR MANUFACTURING A SUBSTANTIALLY DRY HIGH GRADE DIAMMONIUM PHOSPHATE FERTILIZER, WHICH COMPRISES THE STEPS OF REACTING GASEOUS AMMONIA WITH A SPRAYED PHOSPHORIC ACID-CONTAINING SOLUTION IN A CLOSED REACTION CHAMBER TO FORM A SUBSTANTIALLY DRY REACTION PRODUCT, CONTROLLING THE PARTIAL PRESSURE OF AMMONIA IN THE EFFLUENT GAS IS IN THE RANGE FROM ABOUT 30% TO 50%, SPRAYING SAID, PHOSPHORIC ACID-CONTAINING SOLUTION INTO SAID CHAMBER THROUGH A SPRAYING NOZZLE HAVING A DIAMETER IN THE RANGE FROM 1 TO 3 MILLIMETERS, A SPRAYING ANGLE IN THE RANGE OF FROM ABOUT 15* TO 40* AND A ROTATING FREQUENCY OF ABOUT 1000 TO 3000 R.P.M.''S SO AS TO CONTROL THE PARTICLE DIAMETER OF THE SPRAYED SOLUTION AND THE CHARACTER OF ITS DISPERSION, VENTING THE EFFLUENT GAS FROM THE REACTION CHAMBER, CONDENSING WATER IN THE EFFLUENT GAS IN A CONDENSER, SEPARATING DRIED EFFLUENT GAS FROM THE CONDENSER INTO TWO STREAMS, RETURNING A FIRST STREAM CONTAINING ABOUT 80 TO 90 PERCENT OF THE DRIED EFFLUENT GAS INTO THE REACTION CHAMBER, PASSING A SECOND STREAM OF THE DRIED GAS CONTAINING BETWEEN ABOUT 10 TO 20 PERCENT OF THE DRIED EFFLUENT GAS INTO AN ABSORPTION ZONE AND ABSORBING THE SAME IN CONDENSATE FROM SAID CONDENSER TO FORM AN ENRICHED AQUEOUS AMMONIA, RECTIFYING SAID ENRICHED AQUEOUS AMMONIA TO RECOVER AMMONIA GAS, RETURNING THE RECOVERED AMMONIA GAS INTO THE REACTION CHAMBER, AND RECOVERING THE SUBSTANTIALLY DRY REACTION PRODUCT FROM SAID REACTION CHAMBER.
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