Storage-type super-low nitric oxide system in coal fired boiler coal mill
A technology for nitrogen oxide and coal-fired boilers, which is applied in the direction of combustion methods, combustion equipment, fuel supply, etc., can solve the problems of large investment in SCR out-of-stock devices, reduction of nitrogen oxide emissions, living environment pollution, etc., so that it is not easy to explode, The effect of reducing nitrogen oxide emissions and reducing coal fineness
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[0027] The central storage type super low-nitrogen combustion system of the coal-fired boiler coal mill includes high-temperature flue gas recirculation technology, ultra-fine coal preparation technology and low-nitrogen combustion technology. The high-temperature flue gas recirculation technology adopts the technology of heating and feeding powder from cold furnace flue gas through air preheater and the technology of hot air and high-temperature flue gas drying in the pulverizing system: the so-called technology of heating powder from cold furnace flue gas through air preheater, that is, from the induced draft fan 30 The outlet flue extracts cold furnace smoke and guides it to the inlet of the primary fan 26 through the cold furnace smoke pipe 28. After mixing with part of the cold air at the inlet of the primary fan 26, it is heated by the air preheater 23 to increase the temperature of the cold furnace smoke and heat the furnace smoke. It enters the primary air big wind box 5...
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