富氧条件下低挥发分煤微油点火试验研究

Experimental investigation on ignition of low-volatile pulverized coal in a tiny-oil burner under oxygen-enriched conditions

传统燃煤锅炉点火方式需要消耗大量的燃油,尤其是对于难燃的低挥发分煤种。为了在锅炉点火过程中节约燃油,本文对低挥发分煤种在富氧微油点火燃烧器中点火及燃烧过程进行了试验研究,并应用于某300 MW机组锅炉的富氧微油点火工程。结果表明,富氧条件下微油点火燃烧器能够点燃低挥发分煤种,燃烧器中加入适量的纯氧能够促进煤粉的燃尽,减少点火过程中的黑烟并节约燃油。

During conventional boiler ignition,the fuel oil will be primarily used to preheat the furnace to reach the operating temperature,then the pulverized coal is delivered to the furnace to be ignited.This consumes a large amount of oil,especially for igniting low-volatile coals.To save the consumption of fuel oil,this paper theoretically focused on the experiment of igniting low-volatile coal in a tiny-oil-burner under oxygen-enriched conditions,and the oxygen-enriched tiny-oil ignition technology was applied in a 300 MW unit boiler successfully.The experimental results indicated that,the ignition of low-volatile coal was achieved in a tiny-oil-burner under oxygen-enriched conditions,and appropriate amounts of pure oxygen feeding into the burner could promote the burn out of fuel oil and pulverized coal,which was beneficial to reducing black smoke from oil and saving fuel oil during ignition process.