Excessive SO2 levels in flue gas
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What causes the excessive SO2 levels in flue gas?
The main reason for excessive SO2 levels in flue gas is excessive sulfur content in the gas or oil used. If only one type of fuel is used, desulfurization measures need to be implemented earlier in the process; if multiple fuels are used, each one must be analyzed separately
Can limestone powder be added to the furnace?
The fuel gas contains hydrogen sulfide, which produces sulfur dioxide upon combustion
Reasons for excessive sulfur dioxide levels: 1. High sulfur content in the gas. 2. The furnace is not burning properly; the combustion is incomplete, resulting in excessive production of carbon monoxide, which interferes with the measurement values of sulfur dioxide. 3. Faults in the instrument itself cause the monitoring data to be inaccurate. Treatment: 1. Improve the desulfurization efficiency of gas. 2. Increase the oxygen content in the furnace to ensure complete combustion. 3. Correct instrument faults.
The fuel gas contains a high amount of hydrogen sulfide, so a desulfurization unit is required; for example, a reactor in which liquid alkali reacts with hydrogen sulfide can be used to produce sodium hydrosulfide. This not only helps to reduce the excessive levels of sulfur dioxide in the flue gases but also generates sodium hydrosulfide as a by-product.
Can the original poster explain where the smoke is coming from?