论文部分内容阅读
对直接空冷凝汽器空气侧温度实时监测能够获得各个单元进出口的温度变化情况,对直接空冷凝汽器各单元空气温升的分析可以得到凝汽器表面的积灰严重程度,了解凝汽器各区域的换热差异。凝汽器表面积灰降低了效能,同等条件下表现出空气温升减小及蒸汽侧的凝结换热量降低。研究结果表明:外部条件相同时空冷单元积灰,换热端差增大,而单元的温升减小;空冷单元的送风量需与空气的温升合理匹配,通过增加表面积灰单元凝汽器的风机转速,可以有效降低其背压以及均衡其内部凝结蒸汽量,为空冷机组运行调节提供合理有效的依据,从而达到有效节能的目的。
Real-time monitoring of the air side temperature of the direct air-cooled condenser can obtain the temperature change of the inlet and outlet of each unit. Analyzing the air temperature rise of each unit of the direct air-cooled condenser can obtain the severity of the fouling on the surface of the condenser, Heat exchange differences between the various regions. Ash fouling on the condenser surface reduces performance, showing a decrease in air temperature rise and a decrease in condensing heat transfer at the steam side under the same conditions. The results show that when the external conditions are the same, the dust accumulation in the space-time cooling unit increases, while the temperature difference increases, while the temperature rise in the unit decreases. The blowing capacity of the air-cooling unit needs to be reasonably matched with the air temperature rise. The fan speed can effectively reduce the back pressure and equalize the amount of internal condensed steam, which provides a reasonable and effective basis for the operation regulation of air-cooled units so as to achieve the purpose of energy saving.