粉煤锅炉卫燃带对烟气温度场影响的数值模拟

以100-110MW四角配风的粉煤动力锅炉为对象，在炉膛内燃烧器区段及折烟角下部附近分别设置了不同的卫燃带即人工绝热带，借助于CFX软件开展数值模拟，研究了6种型式的卫燃带对炉内燃气温度的影响。研究表明：卫燃带能提高烟气温度，有助燃烧并将有利于炉膛上部前，后屏及过热器与烟气之间的换热作用；同时在燃烧器区段内设置的卫燃带对炉内烟气温度有更显著的影响。图5表3参8

Numerical Simulation of Influence of Refractory Faced Zones on Temperature Field in Pulverized Coal Boiler

An object of study is furnace of pulverized coal boiler of 100~110MW and distribution wind on the four corner of in this paper. And have studied effects of the refractory faced zones(i.e.locations or zones of plastering the heat insulating material on the inner wall or cooling wall with water of the furnace) to the temperature of the smoking air and the combustion(combustibility) of the furnace systematically. Six teyps of the refractory faced zones are studied in this paper. While laving the refractory faced zones on the inner wall or the cooling wall with the water of the furnace, the pulverized coal make a fire even more easily, and the temperature field of the smoking air is going up in the furnace. But according to the operation experience of the pulverized coal boiler, the refractory faced zones of locations jects produce coke of coal on the inner wall or cooling wall with water easily. So this paper suggests that the refractory faced zones must be laid under zones of the location of jets or close to furnace arch zones(i.e. under location of end of screen) as far as possible.