【正文】 2020T/h 鍋爐直流煤粉燃燒器的設(shè)計(jì) 畢業(yè)設(shè)計(jì)（論文）原創(chuàng)性聲明和使用授權(quán)說明 原創(chuàng)性聲明 本人鄭重承諾：所呈交的畢業(yè)設(shè)計(jì)（論文），是我個(gè)人在指導(dǎo)教師的指導(dǎo)下進(jìn)行的研究工作及取得的成果。 作 者 簽 名： 日 期： 指導(dǎo)教師簽名： 日 期： 使用授權(quán)說明 本人完全了解 大學(xué)關(guān)于收集、保存、使用畢業(yè)設(shè)計(jì)（論文）的規(guī)定，即：按照學(xué)校要求提交畢業(yè)設(shè)計(jì)（論文）的印刷本和電子版本；學(xué)校有權(quán)保存畢業(yè)設(shè)計(jì)（論文）的印刷本和電子版， 并提供目錄檢索與閱覽服務(wù)；學(xué)?？梢圆捎糜坝?、縮印、數(shù)字化或其它復(fù)制手段保存論文；在不以贏利為目的前提下，學(xué)校可以公布論文的部分或全部內(nèi)容。本人完全意識(shí)到本聲明的法律后 果由本人承擔(dān)。 作者簽名： 日期： 年 月 日 導(dǎo)師簽名： 日期： 年 月 日 畢業(yè)設(shè)計(jì)說明書（論文）中文摘要 隨著國民經(jīng)濟(jì)和電力負(fù)荷的迅速增長，電網(wǎng)容量也隨之增加，我國越來越多的采用大容量、高參數(shù)機(jī)組。 關(guān)鍵詞 2020t/h 直流煤粉燃燒器 設(shè)計(jì) 計(jì)算 畢業(yè)設(shè)計(jì)說明書（論文）外文摘要 Title Design of Dc Pulverized Coal Burner of 2020t/h Pulverized Coal Fired Boiler Abstract With the growth of national economy and power load, electrical work capacity has increased rapidly in China. More and more 600MW pulverized coal fired units with high capacity and parameters have been used. As the main part of pulverized coal fired boiler’s bustion equipment, pulverized coal burner has the very tremendous influence to stability and economy of bustion. The content of this graduation thesis is to design the Dc pulverized coal burner of 2020t/h pulverized coalfired boiler. Firstly, by the industry analysis to the given coal, it is identified that the actual coal heat, the basic parameters of the boiler and theoretical air volume and flue gas volume, and then the fuel consumption in the furnace is determined therefore. Secondly, calculating the structure size of the furnace. By assuming volumetric heat load and sectional heat load, we can calculate the volume and cross sectional area and the main body altitude of the furnace. And next according to the coal properties, preliminary select the type and arrangement of the burner. Finally choosing the appropriate milling system on the basis of the coal properties and the boiler capacity. When all the work above is finished, it is possible to calculate the output of the burner and the volume of primary air and secondary air. At this point we can determine the section size of the burner nozzle and the resistance of the burner definitively. The specific result is that the section sizes of of the burner nozzle of the primary air and secondary air are and , and the height of the burner is , and the duct resistance of the primary air and secondary air are and . Keywords 2020t/h Dc pulverized coal burner Design Thermodynamic calculations 目 錄 前言 .......................................................................................................... 1 第一章 緒論 .............................................................................................. 2 1. 1 直流式燃燒器的特點(diǎn)和發(fā)展 ................................................................................................ 2 1. 2 新型燃燒器的發(fā)展 .................................................................................................................. 3 1. 3 燃燒器設(shè)計(jì)的思路和需要注意的問題 ............................................................................... 4 第二章 燃料性質(zhì)和燃燒計(jì)算 ...................................................................................... 6 基本資料和燃料分析 ........................................................................................ 6 燃料的燃燒計(jì)算 ............................................................................................... 8 小結(jié) ............................................................................................................... 12 第三章 爐膛型式及燃燒方式的確定 ........................................................................ 13 鍋爐本體布置 ................................................................................................. 13 爐膛的容積和截面積計(jì)算 ............................................................................... 14 爐膛主要結(jié)構(gòu)尺寸的確定 ............................................................................... 16 爐膛校核熱力計(jì)算 .......................................................................................... 21 小結(jié) ............................................................................................................... 26 第四章 燃燒器的選型和計(jì)算 .................................................................................... 27 燃燒器選型和布置方式確定 ............................................................................ 27 燃燒器制粉系統(tǒng)的選擇 ................................................................................... 28 燃燒器出力和風(fēng)量計(jì)算 ................................................................................... 29 燃燒器尺寸計(jì)算 ............................................................................................. 32 小結(jié) ............................................................................................................... 36 第五章 總結(jié) ................................................................................................................ 38 參考文獻(xiàn) ...................................................................................................................... 40 致謝 .............................................................................................................................. 42 附表 .............................................................................................................................. 43 附圖 .............................................................................................................................. 44 南京工程學(xué)院畢業(yè)設(shè)計(jì)說明書 （ 論文 ） 1 前言 改 革開放 30 年來，電力行業(yè)走過了一條輝煌的改革發(fā)展之路，我國發(fā)電裝機(jī)容量連續(xù)保持每年新增 1 億千瓦的迅猛勢(shì)頭。 目 的 只有一個(gè)，就是保證設(shè)計(jì)的準(zhǔn)確性和實(shí)際性，從而達(dá)到設(shè)計(jì)任務(wù)書的要求。 目前的燃燒器主要有旋流和直流兩種形式，兩者 主要是 由 國外兩大電站鍋爐制造廠商 GE 和 Bamp。 一、直流煤粉燃燒器的作用 煤粉燃燒器做為燃燒設(shè)備的主要部件。直流射流的主要特點(diǎn)是沿著流動(dòng)方向的速度衰減 比較慢，具有 比 較穩(wěn)定的射流核心區(qū)，且一次風(fēng)和二次風(fēng)的后期混合表較強(qiáng) [4, 5]。這樣，在火焰根部不會(huì)因?yàn)槿狈諝舛紵煌耆?，或?qū)е氯紵俣冉档汀Ｓ捎谝淮物L(fēng)攜帶的煤粉著火比較困難，一、二次風(fēng)的混合過 早，會(huì)使火焰溫度降低，引起著火不穩(wěn)定。為提高煤粉火炬的穩(wěn)定性首先使煤粉穩(wěn)定燃燒；針對(duì)我國新經(jīng)濟(jì)形式對(duì)電