【摘要】：貴州省是一個煤炭資源極為豐富的能源資源大省,有江南煤海之稱。國家發(fā)展與改革委員會2號文件已經(jīng)將貴州定位為國家能源基地。將資源優(yōu)勢轉(zhuǎn)化為經(jīng)濟(jì)優(yōu)勢,發(fā)展是貴州省的第一要務(wù)。截至2008年底,已發(fā)現(xiàn)的井田或礦區(qū)331處,累計(jì)煤炭資源儲量504.27億噸。全省范圍內(nèi),除東部有的屬少煤、缺煤地區(qū)外,在全省87個縣中,就有74個產(chǎn)煤縣,含煤面積占全省國土面積的40%以上。目前探明的無煙煤的儲量高達(dá)200億噸。在多煤地區(qū)已經(jīng)建設(shè)了20幾座大型火力發(fā)電廠,是西電東送的重要能源基地,大部分機(jī)組燃用無煙煤,所以引進(jìn)了東方鍋爐集團(tuán)、北京巴威鍋爐制造公司、美國福斯特惠勒三家公司的W火焰鍋爐技術(shù)。本文以一臺北京巴威的300MW W型火焰鍋爐為基礎(chǔ)建立模型,目的在于改善現(xiàn)有運(yùn)行裝置的能源利用效率。本文來源于電廠與鍋爐所的合作項(xiàng)目,具有很強(qiáng)的工程應(yīng)用背景。因?yàn)殡姀S的鍋爐熱效率一直在87%左右,未能達(dá)到鍋爐廠的設(shè)計(jì)值91.85%。鍋爐的熱效率偏低,影響了電廠的經(jīng)濟(jì)利益,同時也帶來了節(jié)能減排的壓力。本文通過fluent6.3對三類工況進(jìn)行了數(shù)值模擬,以找到配風(fēng)的優(yōu)化方案,工況設(shè)置如下：在進(jìn)入燃燒器的總二次風(fēng)量不變的情況下,以基準(zhǔn)工況為基礎(chǔ),通過減少內(nèi)二次風(fēng)風(fēng)量的比例、改變內(nèi)二次風(fēng)旋流葉片的角度、改變外二次風(fēng)旋流葉片的角度。通過模擬找到影響火焰下沖能力、溫度場分布及氧氣濃度分布的主要調(diào)整方法,完成初步的鍋爐配風(fēng)調(diào)整方案,結(jié)合調(diào)試人員在同類型鍋爐多年的調(diào)試經(jīng)驗(yàn),最終得到了符合實(shí)際的調(diào)整方案,使鍋爐熱效率最終提高到90.82%。
[Abstract]:Guizhou Province is a coal resource is extremely rich in energy resources large province, known as the Jiangnan coal sea. The second document of the National Development and Reform Commission has positioned Guizhou as a national energy base. The development is the first priority of Guizhou province to transform the resource superiority into the economic advantage. By the end of 2008, 331 coal fields or mining areas had been discovered, with cumulative coal reserves of 50.427 billion tons. In the whole province, there are 74 coal-producing counties in the 87 counties of the province, except for some coal shortage areas in the eastern part of the province. The coal-bearing area accounts for more than 40% of the total land area of the province. At present, the proven reserves of anthracite as high as 20 billion tons. More than 20 large coal-fired power plants have been built in the multi-coal area, which is an important energy base for the transmission of electricity from the west to the east. Most units are fired with anthracite, so the Dongfang Boiler Group, the Beijing Bawei Boiler Manufacturing Company, was introduced. Foster Wheeler three companies of the W-flame boiler technology. This paper builds a model based on a 300MW W flame boiler in Beijing Bawei. The purpose of this model is to improve the energy utilization efficiency of the existing operating units. This paper comes from the cooperative project between power plant and boiler institute, and has a strong engineering application background. Because the boiler thermal efficiency of the power plant has been about 87%, it fails to reach the design value of the boiler plant 91.85. The thermal efficiency of boiler is low, which affects the economic benefit of power plant, and also brings the pressure of energy saving and emission reduction. In this paper, the numerical simulation of three kinds of conditions is carried out by fluent6.3 to find out the optimal scheme of air distribution. The operating conditions are set as follows: under the condition that the total secondary air flow into the burner remains unchanged, the basic working conditions are taken as the basis. By reducing the ratio of the inner secondary air volume, the angle of the inner secondary air swirl blade and the outer secondary air swirl blade are changed. Through the simulation, the main adjustment methods affecting the flame-down ability, temperature field distribution and oxygen concentration distribution are found, and the preliminary adjustment scheme of boiler air distribution is completed. Combined with the debugging experience of the same type boiler for many years, Finally, the adjustment scheme is obtained, and the boiler thermal efficiency is raised to 90.82%.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM621.2

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