大型汽轮机组高背压供热改造适用性分析

发布时间：2018-04-12 07:31

  本文选题：热电联产 + 高背压　； 参考：《中国电机工程学报》2017年11期

【摘要】：大型汽轮机组采用高背压余热供热,可减少传统抽汽供热造成的可用能损失,而且回收了排汽余热还可扩大机组的供热能力。以某330MW空冷机组为例,建立了高背压余热梯级供热系统理论模型,分析一次网回水温度变化对高背压供热机组性能的动态影响规律,获得了汽轮机组适于开展高背压供热改造的量化结果。结果表明一次网回水温度较低,供热面积较大地区适宜采用高背压供热方式;当回水温度高过59℃时,则不适宜采用高背压供热方式。和传统抽汽供热方式相比,高背压机组供热能力可扩大24.8%;当供热面积达到1000万m2时,发电标准煤耗率仅为138.7g/(kW·h),可有效缓解区域性用电用热矛盾。研究结果可为工程上供热模式的选取提供依据,避免高背压供热改造的盲目性。
[Abstract]:The high back pressure waste heat used in large steam turbine unit can reduce the loss of available energy caused by traditional extraction heat supply, and the recovery of exhaust steam waste heat can also expand the heat supply capacity of the unit.Taking a 330MW air-cooled unit as an example, the theoretical model of high backpressure residual heat cascade heating system is established, and the dynamic influence of backwater temperature change on the performance of high backpressure heating unit is analyzed.The quantitative results of steam turbine unit suitable for high back pressure heat supply reconstruction are obtained.The results show that the temperature of backwater in primary net is lower and the heating area is larger than that of backpressure, but when the temperature of backwater is higher than 59 鈩，

本文编号：1738786