Flue gas desulfurization and denitration for boilers
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Let’s exchange ideas on the processes for desulfurization and denitrification of boilers. Here, we are switching from coal-fired to gas-fired systems, and gas-fired systems also require flue gas desulfurization and denitrification due to strict environmental regulations; let’s learn from each other to make progress together
From Beijing? Why is it so strict? Desulfurization of gas isn’t necessary, but denitrification is essential. However, low-nitrogen burners should be able to meet the required standards these days
The situation in Hebei is really extremely strict nowadays; not a single environmental protection facility is allowed to be missing. Inspections are carried out every day, and there are also offices stationed on site
As far as I know, last year we worked on a project in Beijing; the renovation projects required 80 mg, while the new projects required 30 mg. These low-nitrogen burners combined with FGR are more than sufficient to meet these requirements, so there is no need for additional denitrification equipment. For desulfurization, gas boilers do not produce SO2, unless you are burning oil.
Our company uses Olin low-nitrogen burners; there is no need for desulfurization or denitrification of the flue gases, with sulfur levels around 5 mg；
It’s all to meet environmental regulations; as long as desulfurization and denitrification meet the required standards, that’s sufficient
Contact the boiler manufacturer to adjust for low-nitrogen combustion.
What gas is being burned? Generally, gas used for combustion should be fine; the gas produced by petrochemical industries is desulfurized, so there’s no issue with sulfur. As for nitrogen compounds, low-nitrogen burners can keep levels below 25–35 ；
Whether desulfurization is necessary depends on the composition of the flue gas; desulfurization is definitely required if the standards are exceeded, but it cannot be generalized.
Boilers are fueled by carbon black exhaust – does anyone have any practical experience with desulfurization and denitrification? I hope someone can respond