The deep low nitrogen combustion technology (DLNC) of Lianyungang Shengyuan Technology Co., Ltd. emphasizes deep denitrification and high-efficiency ultra-low nitrate combustion inside the furnace; The depth of deep denitrification in the furnace is manifested in the classification of secondary air depth, lower primary air rate, deep layer low oxygen combustion technology, and deep layer fly ash catalytic combustion technology; The high efficiency of ultra-low NOx combustion in the furnace is reflected in the pursuit of maximizing the denitration efficiency inside the furnace (60-70% related to bed temperature), but not deliberately pursuing the maximization of denitration efficiency inside the furnace. This is to take into account the flue gas temperature required for normal denitration in the SNCR system. DLNC+SNCR efficiency improvement is necessary to ensure ultra-low emissions of flue gas denitrification in CFB boilers.
Our company's deep and efficient ultra-low nitrogen combustion technology (DLNC) in the furnace is mainly characterized by:
1. Secondary air depth graded combustion
2. Catalytic combustion of material layer fly ash
3. Deep layer low oxygen combustion
4. Lower primary wind rate
5. Optimize the fluidization status of materials in the furnace (provide technical support for improving the air cap and air distribution plate)
6. Improve ignition and burnout characteristics (particle size adjustment, uniform coal scattering, and uniform material return implantation technology)
7. Five major cycles (internal, external, bottom slag, fly ash, flue gas)
8. Five port renovation (hood outlet, secondary outlet, coal inlet, coal sowing outlet, return outlet)
9. Five Uniformities (Primary Air, Secondary Air, Coal Combustion, Return Material, Smoke Temperature)
10. Ash addition (adjusting the circulation ratio to affect the bed temperature)
11. Three elimination and two reduction (eliminating local oxygen enrichment, reducing general oxygen enrichment, eliminating local hypoxia, eliminating local high temperature, and reducing general high temperature)
12. Effective nitrogen reduction height in the reduction zone and efficient desulfurization and denitrification (SNCR) in the oxidation zone
13. Heat recirculation maintains bed temperature
14. Smoke duct air supply and water spraying (taking into account desulfurization)
