Interference value self-adaptive suppression system of thermal conductivity type hydrogen online analyzer

Abstract

The invention discloses a self-adaptive interference value suppression system of a thermal conductivity type hydrogen online analyzer, which is characterized in that an electronic system with a simple structure is designed by utilizing low-cost electronic components, 4-20mA signals output by an analysis table are processed, and in the occasion of coexistence of hydrogen, carbon dioxide and methane, a processor senses the content of methane and carbon dioxide in real time, and the interference value of the thermal conductivity type hydrogen online analyzer is suppressed. The interference value of the content of the carbon dioxide and the methane under the current content on the hydrogen measurement value is obtained through calculation, and the interference value is inhibited. The method is a self-adaptive interference value suppression scheme, and compared with a method for setting a fixed interference value in an instrument, the method can also accurately measure the hydrogen content when the content of methane and the content of carbon dioxide change. Compared with a scheme of eliminating an existing infrared analyzer and purchasing an industrial chromatogram, the scheme provided by the invention has the advantages that the cost is low, only one thousandth of the total cost of replacing the industrial chromatogram is realized, the performance is reliable, and the measurement result can completely meet the requirements of a production process.

Description

technical field [0001] The invention relates to an interference value self-adaptive suppression system of a heat conduction type hydrogen online analyzer. Background technique [0002] In the methanol synthesis system based on the coal gasification process, the main components of the raw material gas for synthesizing methanol are carbon monoxide, carbon dioxide, hydrogen and methane, and the percentages of these four substances are crucial process indicators. At present, on-line analytical instruments are generally used to measure the content of these substances. Carbon monoxide, carbon dioxide and methane are mostly monitored by infrared gas analyzers, and hydrogen is mostly monitored by thermal conductivity online analyzers (hereinafter referred to as carbon monoxide meters, carbon dioxide meters, methane meters and hydrogen meters). [0003] The technology of the thermal conductivity hydrogen online analyzer is very mature, the measurement accuracy is relatively high, an...

AI Technical Summary

Problems solved by technology

Although industrial chromatographs have high measurement accuracy and no interference between components, they are more expensive than infrared or thermal conductivity online analysis meters

The price of a reliable industrial chromatograph is generally no less than the sum of four infrared or thermal conductivity analyzers, especially when the infrared or thermal conductivity analyzers can still work normally, these instruments should be replaced with Chromatography, which obviously increases the production cost and causes a waste of resources, which is not economically cost-effective

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