On-line gas analysis for gasification units
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The VG Prima dB online mass spectrometer has been successfully used for the online analysis and monitoring of gases in gasification units. Currently, it is employed in Texaco-process gasification units such as Guotai, Guohong, and Yulin; while in Shell-process gasification units it is used in companies like CNOOC Haitao (Haikou) and Datang Dolun Coal-to-Olefins. The projects under discussion include: the Ningxia Coal 820,000-ton project, and CNOOC’s 800,000-ton project (Haikou), among others. Among them, Zhongtai has been in operation for over three years. Its many advantages, such as fast analysis speed, multiple flow paths, and low maintenance requirements, have gradually led to the replacement of traditional chromatography analyzers. This post was last edited by reny_0901 on 2009-2-25 17:11.]
It has many advantages such as fast analysis speed, multiple flow paths, and low maintenance requirements. Could you elaborate on these? Why are there so many advantages? It almost seems like advertising
CNOOC Jiantao (Hainan Dongfang) Methanol Company did use a mass spectrometer, as it was mentioned during the interview. Of course I didn’t go.
Fast analysis speed: The analysis cycle for each channel is 20 seconds, regardless of whether there are four, six, ten, or even more components to be measured in that channel； This time includes the analysis period and the sample channel switching period). Number of measurement channels: The RMS multi-channel sampling system can analyze up to 250 channels, with typical values being 32 and 64 channels. (Of course, this is limited by the length of the sampling pipeline; too long a length will affect the sampling lag.) It’s also possible to add a sampling pump, but the cost and maintenance requirements increase accordingly. ) Less operation and maintenance required: What ten chromatographs can do can be accomplished by just one mass spectrometer (it goes without saying whether it’s easier to maintain one instrument or ten). ） ； Chromatography also requires a carrier gas, and the costs are high as well (although the initial investment is somewhat higher, it’s hard to say anything if there are many chromatographs). ) etc... This post was last edited by reny_0901 on 2009-2-26 09:19 ]
Thank you. “What ten chromatographs can do, a mass spectrometer can accomplish in just one,” that’s great – at least it makes the workload much lighter for the staff
What is it used to measure? Water gas?
The mass spectrometer records measurement results every minute, almost in sync with production, which helps to guide the manufacturing process. Traditional chromatographs have relatively slow analysis speeds, but they offer good stability and are simple to maintain. Regardless of the type of online analyzer, regular calibration is necessary to ensure accuracy and precision in analysis, so as to truly enable feedback on production and use that information to guide production processes
Are there more detailed instrument readings?
Could the original poster please explain the locations where the online analysis points are located in these devices, as well as the significance of such analysis? I mainly want to learn * a bit.
If one mass spectrometer malfunctions, doesn’t that mean all ten units have to stop working as well?
Why stop? You can switch to manual analysis
What is the cycle hydrogen speed of your mass spectrometry analysis? Can the velocity analysis be the same as that for fresh hydrogen?
Online analysis is an important basis for operation, and the selection of instruments is crucial. Please discuss in detail the advantages and disadvantages of chromatography and mass spectrometry, so that everyone can understand it better! Thank you!
I’m not sure whether it is feasible to use an online analyzer for the gas composition at the outlet of the Luchi furnace
Can a mass spectrometer be used in gasification units? If possible, should the gas be purified before it enters the instrument? Are evolutionary systems complex? Please give me some guidance.
The original poster still needs to clarify three key points: 1. How much is the price per unit? 2 Is the measurement accurate? 3 What is the failure rate? Other factors can be postponed.
This post was last edited by reny_0901 on 2011-4-8 09:22: sgsfdgsdfgfdssssssssssssssssg
This post was last edited by reny_0901 on 2009-7-3 11:04. There’s no problem – Luchi has many furnaces, and the analysis involves multiple components, so online mass spectrometers have a clear advantage. It saves a lot of maintenance work compared to using separate tables and chromatography. In the first phase of projects like that in Datang Keqi, there are 16 Luchi furnaces.
Rapid multi-component analysis is performed at the outlet of the gasifier scrubber tower, and mass spectrometry imposes no restrictions on the components that can be analyzed in the gases. If there are multiple gasification furnaces and sampling and analysis are carried out simultaneously, one chromatograph can replace multiple ones. Disadvantage: It is relatively expensive. There are many cases of mass spectrometry analysis applied to Texaco water-coal slurry gasifiers.
Oh, new wind related to trees! The gas emitted from each Ruqi furnace – in fact, just measuring the oxygen content in the gas coming from each of these furnaces – is already a challenge that cannot be handled domestically; let alone analyzing the gas from 16 furnaces at once. At best, it can be purified and then analyzed using mass spectrometry.