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我省新3000吨/年小氮肥厂,绝大部分使用Z4.7—8/150型氮氢气压缩机（以下简称Z型机）,变换、碳化系统亦是按Z型机Ⅱ级出口压力为6.5kgf/cm～2设计的。但由于本机设计不合理和工艺操作等问题,Ⅱ级出口超压越来越严重（最高出口压力达11kgf/cm～2）,致使碳化、变换设备处于严重超压运转的状态,这不仅严重危及安全,而且也大大影响了生产。按省化工厅指示,我院着手解决Z型机Ⅱ级出口超压问题。
In our province, the new nitrogenous fertilizer plant with a capacity of 3,000 tons / year mainly uses the Z4.7-8 / 150 type nitrogen-hydrogen compressor (hereinafter referred to as the Z type machine). The transformation and carbonation system is also based on the outlet pressure of the Z-type Ⅱ 6.5kgf / cm ~ 2 design. However, due to unreasonable local design and process operation, Grade II export overpressure is more and more serious (the maximum outlet pressure reaches 11kgf / cm ~ 2), resulting in serious overpressure operation of carbonization and conversion equipment, which is not only serious Endangering safety, but also greatly affected the production. According to Provincial Department of Chemical Industry Hall instructions, our hospital started to solve the Z-class Ⅱ level export over-pressure problem.