浅议磷酸料浆泵的选型及轴封改造

以磷肥厂磷酸、磷铵装置中磷酸料浆泵为例，在结合其工况特点及现场使用情况的基础上，从泵的结构形式、过流部件材质、叶轮型式、泵转速等几方面作了简要阐述；另外，对于磷酸料浆泵长期以来比较难解决的轴封问题，介绍了目前在磷酸轴流泵上成功改造的一种集装式双端面机械密封，并提供了该机械密封的设计参数及材质要求；对轴封改进前后，使用填料密封和机械密封的优缺点进行了对比；该机械密封的成功改造，满足了设备长周期运行的要求，大大降低了设备维修资金，具有良好的参考价值，对磷酸料浆泵的选型工作也有很大帮助。

On the selection of Phosphoric acid slurry pump and the seal transformation

In the chemical industry, pump is the most commonly using, the most complicated and irreplaceable operation equipment. Reasonable selection of the pump is important for saving energy. In this article, the author takes the Phosphate fertilizer plant phosphoric acid and ammonium phosphate feed pump device as an example, briefing the structure of the form from the pump, over - current components of material, impeller type, pump speed, etc. aspects based on their working conditions and on - site use. In addition, to solve the problem of seal on Phosphoric acid slurry pump, introduced an assembled double - face mechanical seal in the phosphate fertilizer plant Wengfu phosphate axial flow pump （pump Model： HZ760）. And the author provided the mechanical seal design parameters and material requirements, pointed out the advantages and disadvantages of the packing seal and mechanical seal for a comparison. The success of the improvement of this mechanical seals to meet the equipment requirements of long - period operation, greatly reduces capital equipment, also has a good reference value of the Phosphoric acid slurry pump＇s selection.