Online monitoring system and method for oxygen impurities and application

Abstract

The invention discloses an online monitoring system for oxygen impurities. The online monitoring system comprises a main box body, an explosion-proof treatment unit, an online detection unit and a sample interface unit. According to the online monitoring system and method for oxygen impurities provided by the invention, explosion-proof treatment is carried out, and the system can be directly connected with a side line of a production device. According to a gas chromatography-hydrogen flame detector analysis method for oxide in a liquefied hydrocarbon raw material, 0.05 ml / m<3> oxide monitoringanalysis can be met by optimizing and developing instruments and methods, the detection limit of the oxide is lower than that of an existing analysis method and an existing analysis technology, the requirement of a new generation of polyolefin catalyst for the impurity content of the liquefied hydrocarbon raw material can be met, and the sensitivity of the analysis technology is improved.

Description

technical field [0001] The invention belongs to the field of detection and analysis of petrochemical raw materials, and in particular relates to an oxygen impurity online monitoring system, method and application. Background technique [0002] Liquefied hydrocarbon raw materials are C1-C4 liquefiable low-carbon light hydrocarbons, including C1 methane, C2 ethane, ethylene acetylene, C3 propane, propylene, propyne, C4 butane, butene, butyne, etc. It is the most important raw material for the production of petrochemical polyolefin industry, rubber industry, polyester industry, etc. Its purity and impurity content directly affect the key production indicators such as the activity of the catalyst, the safety of the production device, and the performance of the polymer material. Therefore, monitoring and analyzing the impurity content in liquefied hydrocarbon raw materials by designing and manufacturing online engineering chromatography is the premise to prevent catalyst deactiva...

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Problems solved by technology

[0006] After research, it is found that the oxide detection technology in the prior art still has the following defects: 1) The types of oxide detection are very limited, usually no more than 3, and many of them are only for specific oxides; 2) It can only be sampled and analyzed offline, and cannot Online real-time monitoring cannot guarantee personnel safety and sample representativeness; 3) Data processing requires manual calculation or correction, and data results cannot be processed automatically, and the result data cannot be automatically transmitted remotely; Olefin catalysts require that the content of oxides in the liquefied hydrocarbon feedstock be controlled at 0.10ml / m 3 Below, but the current analysis technology is difficult to achieve 0.10ml / m 3 Oxide Detection Analysis

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