Online analysis system and method for detection of CO gas at ammonia synthesis inlet

Abstract

unit which are sequentially connected, wherein the sampling unit feeds pressure-constant gas into the pretreatment unit through a double-flange high-pressure cut-off valve and a water seal, and then the unit which are sequentially connected, wherein the sampling unit feeds pressure-constant gas into the pretreatment unit through a double-flange high-pressure cut-off valve and a water seal, and then the pressure-constant gas is fed into the gas analysis unit. Sampled gas is automatically subjected to washing, drying and desulfurization, fine filtration, and flow measurement and quantitative analysis. A gas analyzer is subjected to zero calibration and measuring range calibration through standard gas connected at the analysis unit, thereby realizing the online calibration of the analysis system. The invention also discloses an online analysis method for the detection of CO gas at an ammonia synthesis inlet. Through the online analysis system disclosed by the invention, the accurate, reliable and online detection and analysis on the content of CO gas at an ammonia synthesis inlet can be realized.

Description

technical field

[0001] The invention relates to an online real-time monitoring system, in particular to an online analysis system for real-time monitoring of CO gas content at an ammonia synthesis inlet. Background technique

[0002] In the production process of ammonia synthesis, the catalyst is its main synthesis medium. The activity of the catalyst directly affects the production of ammonia. However, during the period of stable activity, the activity of the catalyst is often significantly reduced or even destroyed due to contact with a small amount of impurities. This phenomenon is called Catalyst poisoning is generally believed to be caused by the active centers on the catalyst surface being occupied by impurities. For example, for the iron catalyst in the ammonia synthesis reaction, CO, CO2, O2, and water vapor can all cause catalyst poisoning. Even if pure hydrogen and nitrogen mixed gas can restore its activity, the performance of the catalyst will be severely reduced...

Images