Raw material preparation: the main raw materials are phosphoric acid and ammonia gas.
Acidification: Phosphoric acid is injected into a reactor, appro-priate amount of water is added, and the reactor is heated up.
Evaporation: The ammonium hydrogen phosphate solution iscooled through a heat exchanger and then heated by an evapora-tor to evaporate the water in it.
Crystallization: When the water in the ammonium hydrogenphosphate solution reaches a certain concentration, the crystal.lizer is carried out to obtain diammonium hydrogen phosphateerystals.
Drying: Diammonium hydrogen phosphate crystals need to bedried after crystallization and classification.
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