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本文从强化炉内气流扰动,延长未燃烬颗粒在炉内的燃烧时间出发,采用上射流栅和底射流栅相结合的方法,研究了油炉改烧水煤浆或煤粉后强化燃烧提高效率的问题。结果表明上述方法不但在理论上是成立的,而且具有很大的实用性。采用了这一方法后,在相同出力下可以提高燃烧效率,在维持相同的燃烧效率时可以提高燃烧强度从而增大锅炉出力,提高的程度取决于能够实现的回收率大小,也与燃料燃烧特性和颗粒尺寸分布有关。计算和实验均表明,从提高燃烧效率看,射流栅方法对较难燃烧或颗粒尺寸较大、分布较散的燃料有更大的效果,但同时也要求有较大的补偿回收率才能达到相同的强化倍数,如本文燃烧试验两种水媒浆相比较中的八一煤浆。
In this paper, the gas flow perturbation in the furnace was strengthened to prolong the combustion time of unburned ember particles in the furnace. By combining the upper jet grid and the bottom jet grid, Efficiency issues. The results show that the above method is not only theoretically established, but also has great practicality. With this method, the same output can improve the combustion efficiency, while maintaining the same combustion efficiency can increase the combustion intensity and thus increase the boiler output, the degree of improvement depends on the size of the recovery rate can be achieved, but also with the fuel combustion characteristics And the particle size distribution. Calculations and experiments show that to improve the combustion efficiency, jet grid method is more difficult to burn or larger particle size, more dispersed fuel has a greater effect, but also requires a larger recovery rate to achieve the same Of the strengthening factor, such as the combustion test two kinds of water-based slurry in comparison Bayi coal slurry.