【正文】 姓名： 王建超 學(xué) 歷： 本 科 專業(yè)名稱： 熱能與動力工程 班級名稱： 熱動 0942 學(xué) 號 ： 0903411229 指導(dǎo)教師： 張志正 教師職稱： 教 授 完成時間： 長 春 工 程 學(xué) 院 摘 要 制粉系統(tǒng)是熱力發(fā)電廠不可缺少的一部分， 鍋爐煤粉制備系統(tǒng)是將磨煤機磨制成一定粒度的煤粉并輸送至鍋爐進行燃燒的所有設(shè)備組成的系統(tǒng)。 此次畢業(yè)設(shè)計的 題目：江蘇新海電廠擴建 330MW 火電機組制粉系統(tǒng)初步設(shè)計。根據(jù)江蘇新海電廠擴建 330MW 機組工程鍋爐容量和燃用煤種，通過計算來選擇和設(shè)計制粉設(shè)備與制粉系統(tǒng)，根據(jù)磨煤出力選擇磨煤機，進行局部阻力和沿程阻力計算，干燥劑和風(fēng)機容量的計算，通過制粉系統(tǒng)空氣動力計算進行風(fēng)機選型。 制粉系統(tǒng)設(shè)計的主要任務(wù)是合理選擇制粉系統(tǒng)及其各種輔助設(shè)備和部件，進行管道的合理布置設(shè)計以及進行整個系統(tǒng)和設(shè)備參數(shù)計算，使制粉 系統(tǒng)能適應(yīng)煤的特性，具有良好的運行性能和技術(shù)指標(biāo)。 關(guān)鍵詞 制粉設(shè)備 制粉系統(tǒng) 磨煤機 設(shè)備選型 Abstract Pulverizing system is an indispensable part of the thermal power plants, the preliminary design of the power plant pulverizing system is an important element in the design of power plant production. The graduate design topics: Jiangsu Xinhai Power Plant Expansion 330MW thermal power unit pulverizing system preliminary design. 330MW units project Jiangsu Xinhai Power Plant Expansion boiler capacity and fueled with coal, by calculating the selection and design of milling equipment and milling system, coal mill grinding coal output options, local resistance and calculating frictional resistance, dry agents and fan capacity is calculated by the aerodynamics of the milling system fan selection. Depending on the selection, draw a diagram of the bustion system and equipment layout. The main task of the milling system design is a reasonable choice pulverizing system and its various auxiliary equipment and ponents, pipeline reasonable layout design, as well as the entire system and device parameters of calculation so that the milling system can adapt to the characteristics of coal, has a good run the performance and technical indicators. Keyword： Milling equipment milling systems mill equipment selection 目 錄 前 言 ................................................................................................................................... 1 第一章 概述 ..................................................................................................................... 2 設(shè)計任務(wù) ................................................................................................................... 2 原始資料 ................................................................................................................... 2 設(shè)計思路 ................................................................................................................... 4 設(shè)計方法 ................................................................................................................... 5 第二章 煤種燃煤量的確定 ............................................................................................. 6 煤質(zhì)的燃燒計算 ....................................................................................................... 6 鍋爐的燃燒量的確定 ............................................................................................... 7 第三章 磨煤機選型及制粉系統(tǒng)形式的確定 ................................................................. 9 根據(jù)燃料量確定磨煤機出力及臺數(shù)的確 定 ........................................................... 9 根據(jù)出力選擇磨煤機及制粉系統(tǒng)類型的選擇 ....................................................... 9 校核出力 ................................................................................................................... 9 第四章 制粉系統(tǒng)熱力計算 ............................................................................................11 初始干燥劑量的確定 ..............................................................................................11 干燥劑初溫的確定 ................................................................................................. 12 干燥劑的組成成分 ................................................................................................. 15 干燥劑核算出力及風(fēng)機容量確定 ......................................................................... 16 第五章 制粉系統(tǒng)管道設(shè)計計算 ................................................................................... 18 一次風(fēng)管 ................................................................................................................. 18 二次風(fēng)管道 ............................................................................................................. 25 一次風(fēng)機進出口管道計算 ..................................................................................... 27 密封風(fēng)管管道計算 ................................................................................................. 28 第六章 制粉系統(tǒng)的空氣動力計算和風(fēng)機的選擇 ....................................................... 30 直吹式制粉系統(tǒng)一次風(fēng)道的阻力計算 ................................................................. 30 .直吹式制粉系統(tǒng)送分管道空氣動力計算 ............................................................ 42 送風(fēng)機管道及局部阻力計算 ................................................................................. 43 風(fēng)機選型 ................................................................................................................. 53 第七章 制粉系統(tǒng)其他輔助設(shè)備的選擇 ....................................................................... 56 原煤倉的選擇與計算 ............................................................................................. 56 給煤機的出力計算和選型 ..................................................................................... 56 粗粉分離器的選擇 ................................................................................................. 57 木塊分離器與木削分離器的選擇 ......................................................................... 57 煤粉分配器的選擇 ................................................................................................. 57 補償器選擇 ............................................................................................................. 57