【正文】 進(jìn)的 8098 單片機(jī)和外圍芯片，具有控制、保護(hù)功能完善、結(jié)構(gòu)簡(jiǎn)單、使用方便的特點(diǎn)，并針對(duì)火電 廠鍋爐燃燒排放粉塵 (飛灰 )比電阻的變化提供多種供電運(yùn)行方式滿足各種不同工況條件的要求。大修時(shí)嚴(yán)格執(zhí)行《電力設(shè)備預(yù)防性試驗(yàn)規(guī)程》中電除塵器章節(jié)對(duì)高壓硅整流變壓器、低壓電抗器、絕緣支撐及連接元件、高壓直流電纜等設(shè)備的試驗(yàn)項(xiàng)目和周期所作的明文規(guī)定，要對(duì)供電裝置的觸發(fā)裝置進(jìn)行性能測(cè)試，對(duì)各種保護(hù)進(jìn)行整定試驗(yàn)，對(duì)電氣高低壓回路與儀表開關(guān)進(jìn)行 校檢，并對(duì)整流變進(jìn)行吊芯檢查。大修結(jié)束后，對(duì)整流變壓器、電場(chǎng)進(jìn)行空載升壓試驗(yàn)，并在運(yùn)行時(shí)進(jìn)行額定工況下的 UI 特性測(cè)試；對(duì)進(jìn)、出口煙氣溫度與壓力指示進(jìn)行測(cè)試；對(duì)濁度儀、照明設(shè)備進(jìn)行測(cè)試。其保護(hù)和報(bào)警功能涉及輸入過流、輸出開路、輸出短路、欠壓保護(hù)、偏勵(lì)磁、可控硅開路和臨界危險(xiǎn)油溫，幾乎涵蓋了火電廠電除塵器運(yùn)行中的所有故障類型。這些粘稠物造成陰極線肥大，陽極板積灰，導(dǎo)致電場(chǎng)的除塵效率下降。振打周期對(duì)除塵效率的影響在于清灰時(shí)能否使脫落的塵塊直接落入灰斗。為了保持電除塵器長(zhǎng)期、高效、穩(wěn)定地運(yùn)行，應(yīng)該對(duì)影響電除塵器效率的因素進(jìn)行分析，并加強(qiáng)對(duì)電除塵器運(yùn)行、維護(hù)和檢修的管理。 lower impedance when the electric field and current bee larger, the requirements of equipment to automatically stepdown in order to maintain the current settings. Internal transformer rectifier voltage and current sampling resistor, the introduction of negative feedback signals, processed by the microputer intelligent control thyristor phaseshift of the conduction angle, the output voltage to change the load to the purpose of output, so that the most effective electric field of corona power. However, some power and control equipment, factory production control of the controller of the device characteristics and control methods are not perfect protection, etc., coupled with the power plant operation and maintenance personnel of equipment There is a certain understanding of the principles of the blind spot, resulting in power supply poor operation of control devices. vibration cleaning device operating mode unreasonable At present, thermal power plants in addition to the use of electricity, and all is vibration cleaning methods. In the vibration intensity and uniformity requirements are met, the vibration system (cycle time, the way) is reasonable for the efficiency of electrostatic precipitator dust impact. Vibration cycle, the impact on the collection efficiency is to be able to make when cleaning off the dust from falling into the ash bucket directly block. Vibration cycle is too long, fouling plate thickness, will reduce the dust in the very board charged the conductive properties, reducing collection efficiency。當(dāng)電場(chǎng)阻抗升高、電流變小時(shí)，要求設(shè)備能自動(dòng)升壓；而當(dāng)電場(chǎng) 阻抗降低、電流變大時(shí)，要求設(shè)備能自動(dòng)降壓以保持設(shè)定的電流。因此，要求電場(chǎng)的煙氣流速不超過 3m/s，一般電場(chǎng)中運(yùn)行的煙氣流速都在 ，且盡可能使煙氣流分布均勻，而振打清灰過頻，是造成除塵器二次揚(yáng)塵最主要的因素。使用低熱值燃煤，會(huì)使鍋爐實(shí) 際燃煤量增加，使煙氣的含灰量增大。大修時(shí)對(duì)電除塵器內(nèi)陰、陽極間距進(jìn)行調(diào)整，并記錄調(diào)整前后的測(cè)