燃煤热电机组氮氧化物排放的智能优化控制分析

Analysis on Intelligent Optimal Control of Nitrogen Oxide Emissions from Coal-fired Thermal Power Units

虽然国家在大力推进绿色环保的社会发展政策,但是燃煤热电依旧是我国最主要的工业供热方式,煤炭燃烧除了会产生碳氧化合物和水蒸气,还会在炉膛高温段使得空气中的氮气和氧气反应生成大量的氮氧化合物。氮氧化合物会造成严重的空气污染需要进行严格控制,热电厂通常会采用非选择性还原+选择性还原耦合技术对煤炭进行脱硝处理,文章以脱硝处理的控制方法作为研究对象,首先介绍烟气脱硝的两种方法以及传统脱硝系统组成,然后根据现有的控制方法存在的缺点进行优化和改进,并提出采用智能前馈的优化控制策略。

Although the country is vigorously promoting a green and environmentally friendly social development policy,coalfired thermal power is still the most important industrial heating method in my country.In addition to the production of carbon and oxygen compounds and water vapor,the combustion of coal will also make the air in the high temperature section of the furnace The reaction of nitrogen and oxygen produces a large amount of nitrogen and oxygen compounds.Nitrogen oxides can cause serious air pollution and need to be strictly controlled.Thermal power plants usually use non-selective reduction+selective reduction coupling technology to denitrify coal.The control method of denitrification treatment is used as the research object.First,the flue gas denitrification is introduced.The two methods and the traditional denitrification system are composed,and then optimized and improved according to the shortcomings of the existing control methods,and an optimized control strategy using intelligent feedforward is proposed.The superiority of the proposed scheme is verified by the simulation comparison of the two control strategies.