【正文】 檢驗大修工作的效果。如果鍋爐內(nèi)水汽泄露，將增加煙氣濕度，雖然在極短時間內(nèi)因煙氣被調(diào)質(zhì)而降低了煤灰比電阻，除塵效率會升高，但時間稍長，電除塵器將嚴(yán)重積灰，尤其在泄露量大時，極板甚至結(jié)垢，會降低除塵器的使用壽命。 1 影響電除塵器除塵效率的因素 高低壓供電控制裝置設(shè)計運行不佳 合理的電除塵器電暈功率是保證電除塵器安全、穩(wěn)定運行的重要因素之一。電除塵器直流高壓由 380V 交流電流經(jīng)可控硅高壓整流設(shè)備供給，除塵器電場阻抗對高壓供電裝置來說是一個變化的負(fù)載。 煤種的變化 如果鍋爐燃燒煤種發(fā)生了變化，其熱值較設(shè)計煤種低，灰分較設(shè)計煤種高，則會加大對輸煤、制粉、除塵、輸灰設(shè)備的磨損，縮短設(shè)備的檢修周期。 。這樣會使電除塵器處理煙氣含塵濃度超過設(shè)計值，除塵效率將受到嚴(yán)重影響。整流變壓器內(nèi)部的電壓、電流取樣電阻，引進(jìn)負(fù)反饋信號，經(jīng)微機(jī)智能處理后移相控制可控硅的導(dǎo)通角，改變負(fù)載輸出電壓，達(dá)到穩(wěn)定輸出的目的，使電場獲得最有效的電暈功率。 of Turbidimeter, lighting equipment for testing. If the conditional words, it should also be on the ESP collection efficiency before and after overhaul parison test, to test the effectiveness of repair work. 保證電除塵器高效穩(wěn)定運行的措施 電除塵器是一種高效的除塵器，已被越來越多的火力發(fā)電廠所采用。當(dāng)鍋爐長時間 低負(fù)荷運行時，為穩(wěn)定燃燒，必須投入重油或柴油助燃，造成煙氣溫度和煙氣中的粘稠物增加。 (5)電除塵器大修后的整體調(diào)試。采用這種供電裝置對原有的設(shè)備進(jìn)行改造，可實現(xiàn)中央機(jī)遠(yuǎn)程并借助粉塵濁度檢測儀的反饋信號構(gòu)成電除塵器的閉環(huán)控制，達(dá)到高效節(jié)能運行的效果。在振打力度和均勻性都滿足要求的情況 下，振打制度 (周期、時間、方式 )是否合理對電除塵器除塵效率影響極大。 vibration cycle is too short, dust will be dispersed into falling, have given rise to the second dust , that is deposited on the electrostatic precipitator dust collecting on the pole again with a dust collector currents, in particular the electric field at the end of the second polar dust would greatly reduce the efficiency of electrostatic precipitator. Dust caused by the second there are many factors, such as high resistivity dust, resulting in anticorona electric field collecting the uneven distribution of the flue gas flow rate or flow rate caused by high turbulence and swirl. Therefore, the requirements of the electric field of flue gas flow rate of not more than 3m / s, the general operation of the electric field in the flue gas flow rate / s or so, and the possible distribution of flue gas flow, and the vibration frequency of cleaning off is caused by dust Secondary dust factor. Follow certain procedures, using appropriate test methods, establish the right vibration system, at the same time strengthen the gray ash bucket equipment maintenance to prevent gray ash blocked out the Big Dipper, can prevent the occurrence of secondary dust. boiler operating parameters deviate from normal Under the normal load in the boiler flue gas flow, exhaust gas temperature, flue gas dust concentration and other parameters with the design parameters of