本文選題：燃煤電廠 + 濕式靜電除塵器�。� 參考：《東南大學》2015年碩士論文

【摘要】：隨著我國電力行業(yè)的不斷發(fā)展,粉塵、二氧化硫、氮氧化物等大氣污染物排放量不斷增加,許多地區(qū)污染物排放量超過環(huán)境容量,大氣污染治理形勢十分嚴峻。對于新的排放限值,傳統(tǒng)的干式除塵器已很難滿足要求。作為高效除塵的終端精處理設備,濕式靜電除塵器(WESP)可以高效、連續(xù)地去除煙氣中的微細顆粒物,同時其對液滴、S03、重金屬等污染物的收集效果比較理想,具有協(xié)同脫除多污染物的強大功能。本文首先對我國燃煤電廠粉塵排放現(xiàn)狀和存在的問題進行了詳細分析,介紹了燃煤電廠煙塵控制技術(shù)的新技術(shù)、新工藝。對濕式靜電除塵技術(shù)(WESP)的工作原理、技術(shù)特點、在國內(nèi)外大型燃煤機組的應用現(xiàn)狀進行了詳細介紹,闡述了目前國內(nèi)外濕式靜電除塵器的技術(shù)流派,對其關(guān)鍵技術(shù),如陽極技術(shù)、陰極線、結(jié)構(gòu)形式等進行了研究,結(jié)合實際工程應用,重點對柔性電極濕式靜電除塵關(guān)鍵技術(shù)工程應用進行分析研究。實驗室研究主要對濕式靜電除塵器的氣流均布和極線技術(shù)進行分析、研究,工程設計實例通過采用柔性電極技術(shù)的兩臺300MW燃煤機組(湖南益陽發(fā)電廠#1、#2機組)濕式靜電除塵工程項目的對比,對設計過程的分析和總結(jié),結(jié)構(gòu)形式、陰極線等關(guān)鍵技術(shù)的優(yōu)化,CFD流場模擬及實測數(shù)據(jù)的比對,設計回訪,分析了兩臺機組濕式靜電除塵器各自的運行情況,對其中關(guān)鍵技術(shù)采用的優(yōu)化所產(chǎn)生效果的影響因素進行了分析。研究結(jié)果表明,合理的結(jié)構(gòu)形式、極線技術(shù),可大大提高濕式靜電除塵器的可靠性和穩(wěn)定性。通過本文研究,獲得了部分適合工業(yè)應用的設計成果：在國內(nèi)燃煤電廠具備大規(guī)模應用的立式垂直濕式靜電除塵器的結(jié)構(gòu)形式；下進上出逆流式結(jié)構(gòu)高效的布置形式；四向放電的2205雙相不銹鋼剛性芒刺線；六向放電的鈦合金剛性魚骨針刺線等。為進一步推廣和應用柔性電極技術(shù)濕式靜電除塵器提供了理論依據(jù)和工程示范。
[Abstract]:With the development of electric power industry in China, the emissions of dust, sulfur dioxide, nitrogen oxide and other atmospheric pollutants are increasing, and the discharge of pollutants exceeds the environmental capacity in many areas, so the situation of air pollution control is very serious. For the new emission limit, the traditional dry dust collector has been difficult to meet the requirements. As a terminal fine treatment equipment for high efficiency dust removal, the wet electrostatic precipitator (WESP) can effectively and continuously remove fine particles from the flue gas. At the same time, the collection effect on droplet S03, heavy metal and other pollutants is relatively ideal. The utility model has the powerful function of synergistic removal of multiple pollutants. In this paper, the present situation and existing problems of dust emission from coal-fired power plants in China are analyzed in detail, and the new technology and technology of dust control in coal-fired power plants are introduced. This paper introduces in detail the working principle and technical characteristics of wet electrostatic precipitator (WESP) and its application status in large coal-fired units at home and abroad, expounds the technical schools of wet electrostatic precipitator at home and abroad, and discusses the key technologies of the wet electrostatic precipitator. Such as anode technology, cathode line, structure form and so on, combined with practical engineering application, the key technology of wet electrostatic dust removal with flexible electrode is analyzed and studied. Laboratory studies mainly focus on the analysis of airflow distribution and pole line technology of wet electrostatic precipitators. Through the comparison of two 300MW coal-fired units (#1 #2 unit, Yiyang Power Plant, Hunan Province) with the flexible electrode technology, the analysis and summary of the design process and the structure form are given. The simulation of CFD flow field and the comparison of measured data with the key technologies such as cathode line are optimized. The design and return visit are carried out, and the respective operation conditions of the two sets of wet electrostatic precipitators are analyzed. The factors influencing the effect of the optimization of the key technology are analyzed. The results show that the reliability and stability of wet electrostatic precipitator can be greatly improved by reasonable structure and pole line technology. Through the research in this paper, some design results suitable for industrial application have been obtained: the structural form of vertical wet electrostatic precipitator with large-scale application in domestic coal-fired power plants, the efficient arrangement of down-in and upflow structure, and the structure of vertical wet electrostatic precipitator with large-scale application in domestic coal-fired power plants; 2205 duplex stainless steel rigid barbed wire with four direction discharge and rigid fishbone needle wire with six direction discharge titanium alloy. It provides theoretical basis and engineering demonstration for further popularization and application of flexible electrode technology for wet electrostatic precipitator.
【學位授予單位】：東南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X773

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