【摘要】：面對日益提高的煙塵排放要求,加之逐漸提高的環(huán)境保護(hù)意識,降低發(fā)電煙塵排放濃度成了當(dāng)務(wù)之急。在發(fā)電廠眾多設(shè)備中除塵器是煙氣除塵的最主要設(shè)備,因此對除塵器的提效改造就顯得尤為必要。本文結(jié)合烏拉特電廠實際情況,對烏拉特電廠電除塵改造技術(shù)進(jìn)行研究,選題具有工程應(yīng)用價值。論文首先介紹了除塵器的工作原理、分類和性能指標(biāo),重點分析了電廠常用的靜電除塵、袋式除塵和電-袋復(fù)合除塵的原理和各自優(yōu)缺點。之后結(jié)合烏拉特電廠的實際情況提出了原廠電除塵器的三種改造方案:將原電除塵器更換高頻電源改進(jìn)控制系統(tǒng)的方案一、將電除塵改造為袋式除塵的方案二以及將電除塵改為電-袋復(fù)合除塵的方案三。然后通過除塵指標(biāo)、改造工作量、改造成本和運行維護(hù)成本各方面的技術(shù)經(jīng)濟比較,確定了電廠除塵器改造的最終方案。在此基礎(chǔ)上,結(jié)合具體機組除塵器情況,詳細(xì)設(shè)計了原電除塵器的具體改造措施。最后對比分析了烏拉特電廠電除塵器技術(shù)改造前后的除塵效果和節(jié)電效果,分析表明通過將首級電場電源更換為高頻電源和對整個除塵控制系統(tǒng)的升級改造,電廠煙氣可以滿足最新的排放要求,而且還可以大幅度降低除塵器的運行電耗。
[Abstract]:It is urgent to reduce the emission concentration of power generation dust due to the increasing demand for dust emission and the increasing awareness of environmental protection. Dust collector is the most important equipment of flue gas dedusting in many equipments of power plant, so it is necessary to improve the efficiency of dust collector. Based on the actual situation of Wulat Power Plant, this paper studies the electrodedusting technology of Wulat Power Plant, and the selected topic has engineering application value. Firstly, the paper introduces the working principle, classification and performance index of the precipitator, and analyzes the principles, advantages and disadvantages of electrostatic precipitator, bag dedusting and electric-bag compound dedusting, which are commonly used in power plant. Then, according to the actual situation of Urat Power Plant, this paper puts forward three retrofitting schemes of the electric precipitator of the original plant: the scheme of replacing the original electrostatic precipitator with the high frequency power supply and improving the control system. The second scheme is to change the electrodedusting into bag dedusting, and the third is to change the electrodedusting to the electric-bag compound dedusting. Then through the technical and economic comparison of dust removal index, reconstruction workload, transformation cost and operation and maintenance cost, the final scheme of dust remover transformation in power plant is determined. On this basis, combined with the specific situation of the unit dust collector, the detailed design of the original electrostatic precipitator concrete improvement measures. Finally, the dust removal effect and energy saving effect before and after the technical transformation of the electric precipitator in Wulat Power Plant are compared and analyzed. The analysis shows that by replacing the first stage electric field power supply with the high frequency power supply and upgrading the whole dust removal control system, The flue gas of the power plant can meet the latest emission requirements and greatly reduce the operation power consumption of the precipitator.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM621.73

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本文編號：2470890