ICS27.040 F30 备案号：××××× -20XX 中 华 人 民 共 和 国 电 力 行 业 标 准 DL/T XXXX－20XX 代替DL/T834 －2003 火力发电厂汽轮机防进水和冷蒸汽导则 Guidelines for the prevention of water and co ld steam damage to steam tur bines in thermal power plant (报批稿) 20XX-XX-XX发布 20XX-XX-XX实施 国家能源局 发布 DL/T—20×× I 目次 1 前言 ................................ ................................ ................................ ................................ ................................ Ⅱ 1 范围 ................................ ................................ ................................ ................................ ................................ .. 1 2 规范性引用文件 ................................ ................................ ................................ ................................ .............. 1 3 术语和定义 ................................ ................................ ................................ ................................ ...................... 1 4 总则 ................................ ................................ ................................ ................................ ................................ .. 2 5设计要求 ................................ ................................ ................................ ................................ ........................... 2 5.1 锅炉水位保护系统 ................................ ................................ ................................ ................................ ... 2 5.2 过热器和再热器减温器 ................................ ................................ ................................ ........................... 4 5.3 旁路系统 ................................ ................................ ................................ ................................ ................... 5 5.4 主蒸汽和再热热段蒸汽系统 ................................ ................................ ................................ ................... 5 5.5 再热冷段蒸汽系统 ................................ ................................ ................................ ................................ ... 5 5.6 汽轮机本体 ................................ ................................ ................................ ................................ ............... 7 5.7 回热抽汽和供热抽汽系统 ................................ ................................ ................................ ....................... 8 5.8 回热加热器 ................................ ................................ ................................ ................................ ............... 9 5.9 除氧器 ................................ ................................ ................................ ................................ ..................... 11 5.10 轴封系统 ................................ ................................ ................................ ................................ ............... 13 5.11 辅助汽轮机 ................................ ................................ ................................ ................................ ........... 14 5.12 疏水管及疏水扩容器 ................................ ................................ ................................ ........................... 15 6运行要求 ................................ ................................ ................................ ................................ ......................... 16 6.1 主蒸汽和再热热段蒸汽系统 ................................ ................................ ................................ ................. 16 6.2 再热冷段蒸汽系统 ................................ ................................ ................................ ................................ . 17 6.3 过热器和再热器减温器 ................................ ................................ ................................ ......................... 17 6.4 轴封系统 ................................ ................................ ................................ ...................