1000MW机组塔式锅炉再热汽温偏低的原因分析及调整  

CAUSE ANALYSIS AND EXPERIMENTAL STUDY ON LOW REHEAT STEAM TEMPERATURE OF TOWER TYPE BOILER FOR A 1000 MW UNIT

作　　者：罗韶辉 李春宏 潘国清[2] 

机构地区：[1]神华浙江国华浙能发电有限公司,浙江宁海315612 [2]浙江省电力试验研究院,浙江杭州310014

出　　处：《热力发电》2012年第11期55-58,共4页Thermal Power Generation

摘　　要：对某电厂1 000MW机组塔式锅炉再热汽温长期偏低的原因进行了分析,认为其主要原因是锅炉设计时为防结焦增大了锅炉水冷壁受热面积但未增加再热器及过热器相应受热面,从而导致受热面吸热失衡。对此,在不改造受热面的情况下,通过采取燃烧调整和吹灰优化等措施,使再热汽温比调整前提高了近20℃左右,再热器出口温度偏差也从原来的20℃左右降至10℃以内。按再热汽温每升高10℃煤耗降低0.75g/(kW.h),每台机组年发电量70亿kW.h计算,可节省标煤约7 875t,经济效益显著。By experimental study,the main reason for long term low reheat steam temperature of the tower type boiler was as follows:to prevent the boiler from slagging,the heating surface of water wall was increased during designing but that of the reheater and superheater was not,leading to imbalance of the heating surface.Thus,in the case of no modification on the heating surface,combustion regulation and soot blowing optimization were conducted,which increased the reheat steam temperature by about 20 ℃,and reduced the reheater outlet temperature deviation from 20 ℃ to 10 ℃ or even lower.The economic benefit was dramatically improved.

关 键 词：超超临界机组 塔式锅炉 再热汽温 燃烧调整 吹灰优化 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]