中煤图克化肥项目液氮洗优化操作技改探讨

Discussion on Optimization and Technical Renovation of Liquid Nitrogen Wash of China Coal Tuk Chemical Fertilizer Project

针对中煤图克化肥项目中,液氮洗装置存在的分子筛再生效果不佳、复热解冻时间长、氮气/甲烷塔操作不稳定等问题,进行了技术改造和优化操作。通过选择合适温度基点、增加氮气加热管线及优化氮气/甲烷塔控制指标,实现了装置满负荷运行情况下,各项指标均达到或优于设计值。

For liquid nitrogen wash plant of the China Coal Tuk chemical fertilizer project, technical renovation and optimization have been implemented to solve such problems as bad molecule sieve regeneration effect, long reheat defreezing time, unstable operation of nitrogen-methane tower, etc. By selecting appropriate temperature base point, adding nitrogen heating line and optimizing control figures of nitrogen/methane tower, various parameters have reached or are even better than the design values when the unit operats at full load.