热电厂燃煤锅炉炉内燃烧温度模糊控制技术研究

Research on Fuzzy Control Technology of Combustion Temperature in Furnace of Coal-fired Boilers of Thermal Power Plant

由于传统温度控制技术考虑不够全面,缺乏炉膛出口烟温,导致不同区域的温度难以稳定在目标区间范围内。对此,本文研究了一种热电厂燃煤锅炉炉内燃烧温度模糊控制技术,以屏式过热器与烟气传热的规律为基础,反推炉膛出口烟温热力,确定锅炉炉内燃烧状态。利用模糊器对炉内区域、以及单位升温效率和降温效率进行模糊化处理后,调整燃烧器控温装置,并将调整后状态参数和计算得到的炉膛出口烟温热力数据反馈至模糊器,校验燃煤锅炉炉内燃烧温度,实现循环控制。

Due to the lack of comprehensive consideration of the traditional temperature control technology,the lack of furnace exit flue gas temperature,resulting in different regions of the temperature is difficult to stabilise in the target interval range.In this regard,this paper investigates a fuzzy control technology for combustion temperature in the furnace of coal-fired boilers in thermal power plants,based on the law of heat transfer between the screen superheater and the flue gas,and inversely pushes back the thermal force of the flue gas temperature at the furnace exit to determine the combustion state in the boiler furnace.After using the fuzzifier to fuzzy the furnace area,as well as the unit heating efficiency and cooling efficiency,the burner tem⁃perature control device is adjusted,and the adjusted state parameters and the calculated furnace exit flue gas temperature ther⁃mal force data are fed back to the fuzzifier to calibrate the combustion temperature in the furnace of the coal-fired boiler to achieve the cyclic control.