少油点火与水平浓淡燃烧器相结合在一台600MW机组锅炉上的应用

Low Oil Consumption-based Ignition in Combination with a Rich/lean Combustion Burner as Applied on a 600 MW Boiler

介绍了为减少煤粉锅炉启动用油 ,将少油点火与百叶窗水平浓淡煤粉燃烧器结合 ,并且应用在一台 6 0 0MW的锅炉上的设计、试验和应用情况。点火小油枪的布置位置没有按照传统作法布置在下一次风口内 ,而是将其放置在紧邻下一次风口的二次风口中 ,以避免其因磨损而失效。利用水平浓淡燃烧的特点 ,将小油枪火焰尽量冲向浓侧煤粉气流 ,以便尽可能充分混合。试验表明 ,这种技术能够可靠地点燃煤粉并稳定燃烧 ,取得了显著的节油效果。此外 ,由于每支小油枪都配有专门的火焰检测器 ,而且并入了FSSS系统 。

In an effort to reduce oil consumption during the startup of a pulverized coal-fired boiler a louver structured horizontal rich/lean combustion-based pulverized-coal burner in combination with a low oil consumption for ignition has been used on a 600 MW boiler. The design and tests in connection with the above scheme are described. As opposed to their traditional location in a lower primary-air port, the small oil guns for ignition are mounted in a secondary-air port in close proximity to the lower primary-air port. By taking advantage of the special features of horizontal rich/lean combustion, the small oil gun flame is made by all means possible to plunge toward the rich-combustion side of pulverized coal-air stream to achieve a complete mixing. Tests indicate the above technique is conducive to a reliable ignition of pulverized coal and stable combustion, attaining a significant oil-savings effect. Moreover, as each small oil gun has been provided with a special flame detector and incorporated into a furnace safeguard supervisory system (FSSS), a safe and reliable operation of the boiler is fully guaranteed.