摘要
某些电厂余热锅炉的省煤器和给水加热器比其他省煤器更频繁地遭遇管道故障,这是因为电厂的业主为了获取更大的利益将机组带基本负荷转换到启停式运行,以便充会利用电力销售良机。而余热锅炉在这种循环性运行状态下,会受到热应力、水化学(尤其是溶解氧)以及其他因素的影响,从而导致省煤器管道故障。文章对导致省煤器管道故障的具体原因进行分析。
Because many owners of combined-cycle plants have been forced to transition from baseload to cycling operation, perhaps cycling the plant every day to catch emerging power sale opportunities, some HRSG economizers and feederwater preheaters seem to suffer tube failures more often than others. HRSGs subjected to high cycling operating profiles are affected by thermal stress, water chemistry （notably dissolved oxygen）, other operational considerations, or all of the above resulting the economizer tube failures. This artical analyzes the causes of the failures.
