无辅助汽源的单机冷态启动方法

• Format: Patent
• Language: Chinese
• Published: 21.04.2020
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; FLUES; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; STEAM ACCUMULATORS; STEAM BOILERS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; WEAPONS

本发明公开了一种无辅助汽源的单机冷态启动方法，包括步骤：对锅炉投运油枪点火升温升压，点火后投空预器压缩空气连续吹灰；当主蒸汽压力、温度和蒸汽过热度满足要求时，将主蒸汽送轴封，并将空预器连续吹灰切换至主蒸汽吹灰；控制高、低压旁路门开度使冷段再热汽压向辅汽联箱供汽，当辅汽联箱汽压、汽温符合条件时，启动一次风机，投入锅炉暖风器运行，轴封供汽切至辅汽供汽，启动制粉系统，退出油枪；当主蒸汽及再热蒸汽参数满足汽轮机冲转参数要求时，汽轮机采用高中压缸联合启动方式进行冷态启动以并网带负荷。该发明降低无辅助汽源的单机冷态启动过程中的风险，确保启动过程的安全性。该发明可应用于发电机组单机冷态启动技术领域。