燃煤机组启动过程中二氧化硫控制技术研究

Research on Sulfur Dioxide Control Technologies during the Startup Process of Coal-fired Power Units

摘要

燃煤机组在启动过程中受燃烧状态不稳定、温度梯度变化大、负荷快速爬升等因素的影响，二氧化硫排放有着明显的波动性、阶段性特征，控制难度比稳定运行工况大得多。围绕启动工况下二氧化硫生成和迁移过程，对燃烧系统运行特性、脱硫系统协同机制、核心控制技术实行详细剖析，可以增加污染物全过程治理水平。在此基础上，根据运行参数改良和控制策略调整，可以有效地抑制启动阶段排放波动，增加机组整体环保运行稳定性以及控制精度。

Abstract

During the start-up process of coal-fired power units, the emission of sulfur dioxide is affected by factors such as unstable combustion state, large temperature gradient changes, and rapid load climb, resulting in significant fluctuations and phased characteristics. The difficulty of control is much greater than that of stable operating conditions. A detailed analysis of the operating characteristics of the combustion system, the collaborative mechanism of the desulfurization system, and the core control technology around the generation and migration process of sulfur dioxide under start-up conditions can increase the level of pollution control throughout the entire process. On this basis, by improving operating parameters and adjusting control strategies, it is possible to effectively suppress emission fluctuations during the start-up phase, increase the overall environmental stability and control accuracy of the unit.

关键词

燃煤机组启动 / 二氧化硫控制 / 湿法脱硫 / 排放特征 / 运行优化

Key words

start-up of coal-fired power units / sulfur dioxide control / wet desulfurization / emission characteristics / operation optimization

参考文献

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