The sulfur production furnace has a low acid gas load, and it is planned to introduce gas; I would like to know what the effects of this will be
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This post was last edited by liaifeng on 2018-8-4 20:28. The amount of acidic gas in the sulfur production furnace is insufficient; it is difficult to ensure a high yield of sulfur while maintaining the furnace temperature. Now, to meet environmental standards, it is planned to use gas flames burned simultaneously at the center of the acid gas burner in order to maintain the furnace temperature during production. I’m asking for help – what will be the consequences of this? Is it better to supply gas using the central gas burner of the acid gas burner, or is it more effective to use a pilot light for supplying gas?
Our facility has previously used natural gas for co-firing; the properties of natural gas are relatively stable, and the co-firing period lasted only about a week. The main purpose of this co-firing was to ensure that the temperature in the furnace where acidic gases are burned reached over 1000 degrees, as required by the process specifications. Since the co-firing medium was natural gas and the duration was short, it had no adverse effects on the facility, and both the quality of the sulfur product and the emissions from the chimney remained satisfactory.
We have also used co-firing before, with fuel gas, for a maximum of one month, and no problems occurred during that period. However, the operators must pay close attention to the online ratio analyzer and ensure that the air supply to the sulfur production furnace is slightly higher, in order to prevent the formation of black sulfur during operational fluctuations ； At the same time, it is necessary to adjust the air distribution ratio in front of the sulfur production furnace properly.
Typically, the operating flexibility of sulfur recovery units ranges from 30% to 110%. If the load is below 30%, it is difficult to achieve the required temperature in the sulfur production furnace; in such cases, the method of burning fuel gas alongside, as suggested by the poster, can be employed. Generally, a main burner using fuel gas is employed instead of a pilot light, as pilot lights usually lack adjustment capabilities. However, it should be noted that when burning fuel gas alongside, it is essential to ensure that the online analyzer is operating properly, so as to achieve proper air distribution and avoid the formation of black sulfur.