本文在全面分析了循環(huán)流化床燃燒常規(guī)控制方案的基礎(chǔ)上，結(jié)合我國(guó)循環(huán)流化床鍋爐結(jié)構(gòu)的實(shí)際，對(duì)它的燃燒控制系統(tǒng)提出了一種新的控制方法。首先，設(shè)置主氣流量——給煤量關(guān)系曲線(xiàn)及總風(fēng)量——給煤量關(guān)系曲線(xiàn)在線(xiàn)學(xué)習(xí)單元，在線(xiàn)改變曲線(xiàn)拐點(diǎn)坐標(biāo)，以適應(yīng)由于燃料熱值變化給控制帶來(lái)的影響。其次，提出以主氣流量——給煤量關(guān)系曲線(xiàn)為主，以主汽壓力，主汽流量模糊控制器為輔的燃料給定值設(shè)定方案，在大大提高了控制系統(tǒng)投運(yùn)率的同時(shí)，提高了鍋爐的效率。以上控制方案經(jīng)實(shí)踐證明控制效果良好。
關(guān)鍵詞：循環(huán)流化床模糊控制 在線(xiàn)學(xué)習(xí)過(guò)程控制
Abstract：This Paper presents a new control method based on analyzed the conventional control strategy of CFB boiler combustion system. First, it sets steam flux— fuel supply relation curve and air flux—fuel supply relation curve online study unit which change the curve inflexion to adapt to the influence by the change of fuel supply. Second, the obtain of fuel supply set point enhances the run ratio of the control system and the efficiency of the boiler use of steam flux ----fuel supply relation curve as the primary controller and steam pressure, steam flux fuzzy controller as the secondary controller. The control strategy was proved to have a good effect in practice.
Key words：CFB boiler, Fuzzy control, Study online, Process control