發(fā)布時間：2018-06-23 05:14

  本文選題：大型火電廠 + 濕法除塵��； 參考：《西安科技大學》2017年碩士論文

【摘要】：自《火電廠大氣污染物排放標準》(GB13223-2011)頒布以來,濕式電除塵器技術(shù)得到廣泛應(yīng)用,并首次在大型火電機組——長安益陽發(fā)電有限公司(原國電益陽發(fā)電有限公司)#1爐300MW燃煤發(fā)電機組除塵改造工程成功應(yīng)用,其引進技術(shù)及自主研發(fā)技術(shù)在國內(nèi)如雨后春筍般在火電行業(yè)進行推廣應(yīng)用。針對超低排放,濕法脫硫產(chǎn)生的二次攜帶現(xiàn)象,以及絕緣瓷瓶易損性,導致電場絕緣下降的問題,本文對提高電場投運率的問題展開研究,內(nèi)容包括:(1)對濕法電除塵器陽極材料進行篩選與確定。分析預(yù)洗滌水量q1、煙氣流量q2以及陽極材料q3等主要參數(shù)對氣溶膠污染物脫除率的影響。研究與陽極材料匹配的改進安裝工藝;確定濕法除塵裝置出入口及裝置內(nèi)部速度場的關(guān)系;針對濕式電除塵器結(jié)構(gòu)特點,對施工工藝及施工管理辦法給出針對性解決方案;(2)濕法除塵器工藝優(yōu)化研究。通過濕法脫硫后煙氣粉塵特性研究,分析濕法電除塵器工目前存在的主要問題,氣流流場模擬對進出氣封頭設(shè)計,陽極材料的優(yōu)化改進;針對濕法除塵系統(tǒng)通常存在的問題,通過有限元分析等技術(shù)手段,對濕法電除塵器的流場及關(guān)鍵部件給出關(guān)鍵結(jié)構(gòu)設(shè)計。為益陽電廠濕法除塵系統(tǒng)的設(shè)計提供基礎(chǔ)數(shù)據(jù)支持。(3)濕法除塵的運行控制研究,優(yōu)化運行控制工藝,針對絕緣子加熱器的特性,設(shè)計自整定模糊PID控制器控制電加熱系統(tǒng),建立絕絕緣子電加熱系統(tǒng)的數(shù)學模型,并對自整定模糊PID控制電加熱系統(tǒng)進行仿真驗證和改造后的運行效果比較。(4)濕法除塵升級改造及超凈排放應(yīng)用研究。對益陽#1爐柔性陽極的第一代濕式電除塵器提出升級改造技術(shù)方案。設(shè)計一套全煙氣路徑分級分布式除塵技術(shù)路線,比較傳統(tǒng)的僅在電除塵器上進行技術(shù)升級的減排路線,給出一套系統(tǒng)解決深度減排的方案。針對大型火電廠的超凈排放指標,給出濕法電除塵器的邊界條件和全煙氣系統(tǒng)解決煙囪口超凈排放的系統(tǒng)方案。
[Abstract]:Since the promulgation of the Standard for Atmospheric Pollutant Emission from Thermal Power plants (GB13223-2011), the wet electrostatic precipitator (ESP) technology has been widely used. And for the first time, it has been successfully applied in the retrofitting project of #1 boiler 300MW coal-fired generating set in Changan Yiyang Power Generation Co., Ltd. (former State Power Yiyang Power Generation Co., Ltd). Its imported technology and independent R & D technology in China, such as bamboo shoots in thermal power industry to promote the application. Aiming at the problems of ultra-low emission, secondary carrying phenomenon caused by wet desulphurization, and the vulnerability of insulating porcelain bottle, which lead to the decrease of electric field insulation, this paper studies the problem of increasing electric field operation rate. The main contents are as follows: (1) the anode material of wet electrostatic precipitator is screened and confirmed. The effects of main parameters such as pre-washing water quantity Q1, flue gas flow rate Q2 and anode material Q3 on the removal rate of aerosol pollutants were analyzed. This paper studies the improved installation technology matching with anode material, determines the relationship between the inlet and outlet of wet dust remover and the velocity field inside the device, and aims at the structural characteristics of wet electrostatic precipitator, The solution to the construction process and construction management is given. (2) the optimization of wet dust collector process. Based on the study of flue gas dust characteristics after wet desulphurization, the main problems existing in wet electrostatic precipitator are analyzed, the design of inlet and outlet gas seal by air flow field simulation, the optimization improvement of anode material, and the common problems in wet dust removal system are analyzed. The flow field and key components of wet electrostatic precipitator are designed by means of finite element analysis. It provides basic data support for the design of wet dust removal system in Yiyang Power Plant. (3) Research on operation control of wet dust removal, optimization of operation control technology, design of self-tuning fuzzy pid controller to control electric heating system in view of the characteristics of insulator heater. The mathematical model of insulator electric heating system is established, and the self-tuning fuzzy pid control electric heating system is simulated and compared. (4) the wet dust removal upgrade and the application of super-clean emission are studied. The technical scheme of upgrading the first generation wet electrostatic precipitator with flexible anode for Yiyang #1 furnace is put forward. This paper designs a whole flue gas path hierarchical distributed dust removal technology, compares the traditional emission reduction route that only upgrades the technology on the electrostatic precipitator, and gives a systematic solution to the deep emission reduction. The boundary conditions of wet electrostatic precipitator (ESP) and the scheme of the whole flue gas system to solve the superclean discharge from the chimney mouth are given in accordance with the super-clean emission index of large thermal power plant.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM621.73

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本文編號：2055942