电热管法煤粉多级点火稳燃技术的研究

作者提出了一种全新的煤粉点火稳燃技术，即电热管法煤粉多级点火稳燃技术。该技术是利用中心电热管点燃一股煤粉气流，着火后的煤粉火焰又点燃同轴流动的二级煤粉气流，从而以少量的电能方便而迅速地点燃大容量的煤粉燃烧器。据作者在２５ｍｍ内径电热管多级点火器上的试验，能以３ｋＷ左右的功率，几分种之内点燃６～４０ｋｇ／ｈ的一级煤粉，该煤粉火焰又能点燃２６０ｋｇ／ｈ左右的二级煤粉。另据６０ｍｍ内径电热管的试验，该装置能以１０ｋＷ左右的功率，十几分钟内点燃３６０ｋｇ／ｈ的二级煤粉。可见这是一种极有前途的点火稳燃技术。图７表２参３

Studies of Stable Ignition Techniques of Pulverized Coal with a Multi Stage Electric Heater Pipe Ignitor

The author proposes the use of a new stable ignition technique for pulverized coal——the multistage electric heater pipe stable ignition technique.With this method,a pulverized coal stream is first ignited with a central electric heater pipe,which in its turn ignites a second stage concentric pulverized coal stream.According to tests,a 3 kW electric heater pipe of 25mm inner diameter is capable of igniting a second stage flow of 260kg/h within a few minutes.