国产660MW超超临界燃煤锅炉特性分析及性能试验研究

Analysis of the Characteristics of a Domestically-made 660 MW Ultra-supercritical Coal-fired Boiler and Experimental Study of Its Performance

针对已投运的上海锅炉厂自主设计制造的首台660MW超超临界燃煤锅炉进行了相关性能试验。试验结果表明,投产后锅炉运行状况基本良好,但再热器汽温存在偏差,通过调整运行磨组、二次风配风方式,并将水平偏置二次风开度放置在40%,可有效减小再热器汽温偏差,同时保证较高的锅炉热效率;锅炉在满负荷运行时,较佳的运行氧量在2.8～2.9范围;在通过调节SOFA风量降低NOx时,需保持5层SOFA风中下3层全开。最后,验收试验结果显示,锅炉各项主要性能参数均达到或优于设计值。

Relevant performance tests were conducted of a first 660 MW ultrasupercritical coal-fired boiler,which was put into operation in a power plant and independently designed and manufactured by Shanghai Boiler Works.The test results show that after it has been put into operation,its operation conditions were basically good.However,there exists a deviation in the temperature of steam in the reheater.By adjusting the ball mill group in operation and the overfire air distribution mode,and properly setting the opening of the horizontally-offset overfire air dampers at 40%,the foregoing deviation was effectively reduced and in the meantime,a relatively high thermal efficiency of the boiler was guaranteed.In case of the boiler operating at the full load,the relatively good oxygen quantity for operation fell in a range from 2.8% to 2.9%.When NOx was reduced by adjusting the SOFA（separated overfire air） quantity,the lower three levels of the total five levels of SOFA were necessarily kept being fully opened.Finally,the results of the acceptance test show that all the main performance parameters of the boiler reached or were better than the design values.