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

A gas detection and analysis system technology, which is applied in the direction of analyzing materials, material analysis by optical means, measuring devices, etc., can solve the problems of high error and inability to monitor in real time, and achieve the effect of online detection and analysis

Inactive Publication Date: 2013-09-18
ANHUI HAOYUAN CHEM IND GRP
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, the detection methods of most synthetic ammonia manufacturers for the inlet gas of ammonia synthesis are mainly offline sampling to the laboratory for detection and pre-section control method, which not only cannot be monitored in real time, but also has a high error

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

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Embodiment Construction

[0023] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the online analysis system for detecting CO gas at the ammonia synthesis inlet of the present invention includes a sampling unit 1 , a pretreatment unit 2 , an analysis unit 3 and a calibration unit 4 connected in sequence.

[0025] The sampling unit 1 includes a double-flange high-pressure stop valve 12, a ball valve 13, a ball valve 14, a ball valve 16 and a water seal 15; the two ball valves 13 are installed in the air inlet and the air outlet of the water seal respectively, and the ball valve 14 and the ball valve 16 are the water injection ports of the water seal. valve and drain valve. In this embodiment, the double-flange high-pressure cut-off valve 12 adopts a model of J44H-320P.

[0026] The pretreatment unit 2 includes a water washing bottle 22 , a dryer 23 , a desulfurizer 24 and a filter 25 con...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 郑高潮陈大伟赵廷亚陈少杰
Owner ANHUI HAOYUAN CHEM IND GRP
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