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再热汽温为623℃的再热器管壁温度优化调整

第47卷 第6期 热 力 发 电 V ol.47 No.6 2018年 6月 THERMAL POWER GENERA TION Jun. 2018

收稿日期:2017-08-30

第一作者简介:王小华(1982—),男,硕士,高级工程师,主要研究方向为火力发电厂节能减排技术,xhwang_1102@https://www.doczj.com/doc/c45674073.html, 。

再热汽温为623 ℃的再热器管壁温度

优化调整

王小华1,俞胜捷1,薛晓垒1,王义兵2,梅振锋1,陈 敏1

(1.西安热工研究院有限公司苏州分公司,江苏 苏州 215153;

2.中国华能集团有限公司,北京 100031)

[摘 要]本文以设计再热蒸汽温度为623 ℃的1台660 MW 机组、1台1 000 MW 机组和1台

1 000 MW 二次再热机组为研究对象,综合分析了造成再热蒸汽温度偏低的原因,并有针

对性地进行了优化调整。优化后,再热蒸汽温度均有较大程度的提升,660 MW 机组和

1 000 MW 一次再热机组再热蒸汽温度分别由调整前的609.0 ℃和599.8 ℃提高至

618.0 ℃和619.8 ℃,1 000 MW 二次再热机组高/低压高温再热蒸汽温度分别由调整前的

603.4 ℃和601.4 ℃提高至612.5 ℃和612.7 ℃;同时,末级再热器管壁温度高低点的偏

差也有所降低。该研究结果可为同类型机组再热器管壁温度的优化调整提供参考。

[关 键 词]超超临界机组;再热器;再热蒸汽温度;管壁温度;超温;二次再热;优化调整 [中图分类号]TK229 [文献标识码]A [DOI 编号]10.19666/j.rlfd.201708082

[引用本文格式]王小华, 俞胜捷, 薛晓垒, 等. 再热汽温为623 ℃的再热器管壁温度优化调整[J]. 热力发电, 2018, 47(6): 91-97. WANG Xiaohua, YU Shengjie, XUE Xiaolei, et al. Optimization and adjustment of reheater tube wall temperature with reheater steam temperature of 623 ℃[J]. Thermal Power Generation, 2018, 47(6): 91-97.

Optimization and adjustment of reheater tube wall temperature with reheater

steam temperature of 623 ℃

WANG Xiaohua 1, YU Shengjie 1, XUE Xiaolei 1, WANG Yibing 2, MEI Zhenfeng 1, CHEN Min 1

(1. Xi’an Thermal Power Research Institute Co., Ltd., Suzhou Branch, Suzhou 215153, China;

2. China Huaneng Group Co., Ltd., Beijing 100031, China)

Abstract: This paper takes a 660 MW unit, a 1 000 MW unit and a 1 000 MW double reheat unit with reheat steam temperature of 623 ℃ as research object. The causes of low reheat steam temperature are comprehensively analyzed. And the targeted optimization and adjustment are carried out. After optimization, the reheat steam temperature are greatly increased. The reheat steam temperatures of 660 MW unit and 1 000 MW unit are increased from 609.0 ℃ and 599.8 ℃ to 618.0 ℃ and 619.8 ℃, respectively. The reheat steam temperatures of high and low temperature reheater of 1 000 MW unit are increased from 603.4 ℃ and 601.4 ℃ to 612.5 ℃ and 612.7 ℃, respectively. At the same time, the deviation of high and low temperatures of final reheater tube wall are decreased. This results provide references for the optimization and adjustment of unit reheater tube wall temperature of the same type unit.

Key words: ultra supercritical unit, reheater, reheat steam temperature, tube wall temperature, overtemperature, double reheater, optimization and adjustment

《煤电节能减排升级与改造行动计划(2014—

2020)》为新建机组设计优化指明了方向,给出了

燃煤电厂节能减排主要参考技术,其中提高蒸汽参

数和二次再热技术较为成熟。提高蒸汽参数即将主蒸汽压力提高至27~28 MPa ,主蒸汽温度维持在600 ℃,热再热蒸汽温度提高至610 ℃或620 ℃;二次再热即在常规一次再热的基础上,汽轮机排汽二次进入锅炉进行再热。汽轮机增加了超高压缸,万方数据

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