卧式多级离心式高压氨泵在大尿素装置中的应用

Use of Horizontal Multi-Stage High-Pressure Centrifugal Ammonia Pumps in Large Urea Units

介绍卧式多级离心式高压氨泵及泵用干气密封首次应用于大化肥氨气提法尿素装置的情况。对试车中遇到的干气密封频繁损坏、轴振动、泵输出量逐渐下降等原因进行了系统分析。通过多次改造 ,达到了长周期运转的目的 ,填补了该泵种在国内外应用的空白。

A presentation is given on the use for the first time of the horizontal multi-stage high-pressure centrifugal ammonia pump and dry-gas seals for pumps in the large urea unit based on the ammonia stripping process. A systematic analysis is made of the causes for the frequent damage of dry-gas seals, axle vibration and gradual decrease in pump delivery encountered during the test run. After several renovations, the objective of long-term operation is achieved, and the gaps of the use at home and abroad of this type of pump are filled.