2.5MPa饱和蒸汽下钢铁余热回收中的空气燃烧系数节能控制

在2.5 MPa饱和蒸汽环境下,空气燃烧系数跳变概率大,为了提高钢铁冶炼中余热回收的效率,减少能源消耗,提出一种基于空气燃烧系数优化模型的钢铁余热回收中的节能控制方法。对余热回收系统进行热力学分析,在此基础上建立余热回收的空气燃烧系数模型,利用粒子群算法对模型中的相关参数进行优化,获得最优参数配置和最大的空气燃烧系数。由此实现饱和蒸汽下钢铁余热回收过程中的节能控制。实验结果表明,所提方法能够对钢铁余热回收进行节能控制,效果令人满意。

华能福州电厂二期机组燃烧控制系统的设计分析与优化

介绍了华能福州电厂二期2×350 MW机组采用西门子T—XP DCS实现燃烧控制的系统整体设计,并对设计中具有特色的控制回路进行了分析。此外,对燃烧空气系数校正回路原设计缺陷的原因以及优化方案进行了详细讨论,优化方案投入实际应用后,取得了良好效果。

降低沥青熔化系统中重油消耗的措施

针对碳素厂沥青熔化过程中重油消耗较大的现状,提出了沥青原料管理、沥青熔化设备改进和重油燃烧状态调节等改进措施,取到了降低环境污染和重油消耗的良好效果。

Emission Characteristics and Axial Flame Temperature Distribution of a Circumferential Reverse Flow Combustor

In partially premixed combustion of gas turbine, the combustion temperature should be lowed in order to reduce NOx. One solution is lean premixed combustion. However, the problem is that large excess air ratio may make the combustion unstable. A novel combustor with circumferential reverse flow of fuel gas is proposed for settling this problem. A 10 kw furnace is established to test performance of this combustor. Three factors such as primary air ratio, position of secondary air, total excess air ratio are studied. The emission characteristics and axial flame temperature distribution are studied. Basing on experimental results, the axial flame temperature and NOr emission increase with primary air ratio and axial length of second stream, and decrease with total excess air ratio. When the total excess air ratio is larger than 1.05, the combustor presents a lower temperature field and much lower NOx emission （less than 10 ppm）.