Gasification furnace
Thread Content
What are the reasons for fluctuations in hydrogen at the gasifier outlet?
Changes in coal quality, excessively high furnace temperature, improper control of the water-to-gas ratio, incorrect operation of the shift converter, or issues with the hydrogen-to-carbon ratio setting
A comprehensive consideration is needed; for example, how do the other components of the crude gas change in response to fluctuations in hydrogen levels, and what changes do you make in your operations during this process? Also, whether there have been changes in the quality of the raw coal – only by considering various factors comprehensively can an unbiased assessment be made
To analyze instrument failures, it is necessary to calibrate the instruments； The coal quality has changed; there are variations in ash and volatile matter, so coal quality analysis is required ； The issue of furnace temperature control requires stable operation.
It mainly depends on the fluctuation period; if it is a sawtooth-like vibration measured in minutes, this is caused by the sampling interval of the sampling pump in the online instrument； If measured in hours, it is basically short-term fluctuations in furnace temperature; these may be caused by uneven coal mixing, or by inappropriate ratios of oxygen to coal and water to oxygen ； If the cycle is longer, it is almost certainly due to changes in coal quality