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介绍甘肃瓮福公司“加压反应-自热浓缩”粉状磷酸一铵节能新工艺。针对该工艺存在的操作弹性小、换热器结垢严重、生产周期短、清理时间长等问题,进行了技术改造。采取将三效蒸发浓缩改为二效蒸发浓缩,将第1效由浓缩磷酸改为浓缩磷铵料浆,将第2效降膜真空蒸发改为强制循环真空蒸发。改造后生产周期由5~6 d延长到15 d,实现了装置的达产达标。
Introduction Gansu Wengfu company “pressure reaction - self-heat concentration ” powdered ammonium phosphate a new energy-saving technology. In view of the existence of the process of operating flexibility is small, serious heat exchanger scaling, short production cycle, clean up a long time and other issues, the technical transformation. Take the three-effect evaporation concentrated to two effect evaporation concentration, the first effect from concentrated phosphoric acid to concentrated ammonium phosphate slurry, the second effect falling film vacuum evaporation was forced circulation vacuum evaporation. After the transformation, the production cycle was prolonged from 5 to 6 days to 15 days, achieving the unit’s production up to standard.