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1)  wet-process phosphoric acid(WPA)concentration
湿法磷酸浓缩
2)  vacuum concentration of wet-process phosphoric acid
湿法磷酸真空浓缩
1.
For the design selection issue of vacuum source for vacuum concentration of wet-process phosphoric acid,some commonly used types and their process flows and operating conditions are outlined,and through comparisons of energy consumption and investment,it is considered that the vacuum source should be selected according to the actual situation.
针对湿法磷酸真空浓缩真空源的设计选用问题,阐述了常用的几种类型及其工艺流程和操作工况,通过能耗、投资等的比较,认为应结合具体情况选用真空源。
3)  Phosphoric acid by wet process
湿法(浓)磷酸
4)  phosphoric acid concentrated process
磷酸浓缩法
5)  phosphoric acid concentration
磷酸浓缩
1.
A novel energy saving and exhaust reduction process,characterized by phosphoric acid concentration with the heat recovered from the DAP tail gas exhausted from the pre-neutralization reactor,is proposed for AP production,which results in the energy consumption reduced by 31.
首次提出DAP预中和反应尾气分流进行余热回收浓缩稀磷酸的磷铵节能减排工艺,源头减少湿线尾气水蒸气排放量,降低湿法磷酸浓缩能耗31。
2.
For problems occurred during the production after upgrade of the tube and shell type graphite heat exchanger and axial flow pump equipment of the phosphoric acid concentration system for DAP production,a revamp scheme for parallel use of a new train and an old train of graphite heat exchanger and axial flow pump with different type and size is adopted.
针对DAP生产磷酸浓缩系统的管壳式石墨换热器和轴流循环泵设备更新后生产上出现的问题,采用型号、规格有差异的新老两套石墨换热器和轴流泵并联使用的技改方案,讨论了工艺指标的确定和操作控制要点,并介绍了运行效果。
6)  concentrated phosphoric acid
浓缩磷酸
1.
Study on technology for production of IMAP with concentrated phosphoric acid;
浓缩磷酸生产工业级磷酸一铵的研究
补充资料:湿法磷酸
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性质:广义上是指用硫酸、盐酸和硝酸三种强酸中的任何一种酸分解天然磷矿制得的磷酸溶液。作为商品直接出售的湿法磷酸产品。应具有尽可能高的P2O5含量,尽可能低的腐蚀性,适当的冰点和黏度。使其便于贮运。其代表性的组成为:P2O552%~55%、SO33.0%~4.5%、F0.8%~1.0%。25℃时的密度为1.65~1.70g/cm3。冰点在-20℃左右。用硫酸分解磷矿制取磷酸的生产方法,在技术上最成熟,在经济上最合理,在应用上最广泛在磷酸总产量占绝对优势。故在工业上湿法磷酸主要是指硫酸分解磷矿制的磷酸。工业上用半水物、二水物、半水-二水法、二水-半水法等生产,并采用再结晶或强制循环真空蒸发等法制得较纯的产品。无水物法未实现工业化。

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