Regarding boiler operation
Thread Content
Our company has a boiler that uses phosphine off-gases for combustion. There are currently two issues: 1. When the boiler operates at the same load, the nitrogen oxide levels vary at different times, and in some cases these levels exceed the allowed limits ； 2. How to reduce nitrogen oxide levels without reducing the load.
Search for low-nitrogen retrofit technologies (burners):)
Are there any technical manufacturers in this field? Please provide some!
1. Check for air leaks and reduce the oxygen content in exhaust gases (suitable for cases where the conversion index is slightly high)； 2. Replace with a low-nitrogen burner (look for manufacturers with similar application experience) ； 3. Install SCR and SNCR denitration devices (in combination with 2 to achieve ultra-low emissions).
FGR exhaust gas recirculation is used to reduce the oxygen supply to the furnace in order to lower the levels of nitrogen oxides
What is the effect of exhaust gas recirculation on nitrogen oxide control?
A slightly higher level works well; going much higher doesn’t help much
This post was last edited by ＋_Wc59m on 2024-10-28 09:17. At our subsidiary in Yunnan, we also use boilers for treating yellow phosphorus exhaust gases. After consulting with the burner manufacturer (Wuxi Oubo), it is possible to keep nitrogen oxide levels below 100, provided that the pressure of the yellow phosphorus exhaust gas flow remains stable at around 5 KPa, in conjunction with an FGR system. To reduce nitrogen oxides to below 50, PNCR can be applied within an appropriate temperature range inside the furnace (850°–950°). This approach results in lower operating costs; although SCR is a mature technology, its annual operating costs are 200–300 W higher than those of the aforementioned approach. Boiler 60T/H