Horizontal dense-dilute concentration type direct flow pulverized coal burner |
Title： |
| Horizontal dense-dilute concentration type direct flow pulverized coal burner |
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Application Number： |
200610088860 |
Application Date： |
2006/07/21 |
Announcement Date： |
2008/01/23 |
Pub. Date： |
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Publication Number： |
101109506 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
F23D 1/00 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Zhang Hai, Lu Junfu, Xu Xiuqing, Liu Qing, Yue Guangxi |
Key Words： |
Horizontal, dense-dilute concentration type, direct flow, pulverized coal burner |
Abstract： |
A horizontal gradation rich direct-flow coal-powder burner is provided, which relates to a coal-powder gradation burner with four corners arranged tangentially. The invention is characterized in that, the air flow of the primary air coal powder is separated by gradation, at the outlet of the channel for the thicker air flow, a stage-I separating block and a stage-II separating block for thicker whiff are provided so as to separate the air flow with thick powder into upper, middle and lower whiffs; the nozzle structure uses a nozzle structure for rich thick whiff. The ignition process is completed in three stages. The invention not only reduces the firing heat necessary for firing, is good for firing and burning, but also solves the low-load de-oiling steady burning when a 300-600MWe boiler burns difficult-to-burn coal; is especially suitable for 100, 200, 300 and 600MWe boilers to burn low-quality bituminous coal, poor coal, semi anthraciferous coal and anthraciferous coal as well as suitable for rebuilding the said boilers, also is good for reducing the emission of NOx and eliminating slagging scorification and corrosion under high temperature of the water-cooled wall in the burner area. |
Claim： |
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