【正文】 風(fēng) 教 授 專 業(yè)：熱能與動力工程 重慶大學(xué)動力工程學(xué)院 二 O 一一年六月 Graduation Design(Thesis) of Chongqing University The Analysis of Arrangement Scheme and Preliminary Design of 35t/h LowCalorie Coalfired Industrial CFB Boiler Undergraduate： Jianbo Li Supervisor: Prof. Xiaofeng Lu Major: Thermal Energy and Power Engineering College of Thermal Energy and Power Engineering Chongqing University June 2021 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 中文摘要 I 摘 要 隨著我國煤炭 形勢 逐漸緊張 和 國家排放法規(guī)的日益嚴格， 像 煤矸石 這樣的 劣質(zhì)燃料的 燃燒技術(shù) 越來越受到限制，燃料范圍廣泛且高效環(huán)保的循環(huán)流化床工業(yè)鍋爐成為工業(yè)鍋爐的主要發(fā)展方向。目前國內(nèi) 循環(huán)流化床工業(yè)鍋爐 的燃料大都在12MJ/kg 以上，對低于 12MJ/kg 的劣質(zhì)燃料研究涉及較少。 針對這些問題， 重慶大學(xué)燃燒環(huán)保研究室提出了帶有爐膛隔墻的循環(huán)流化床燃燒 專利 技術(shù)。主要研究計算表明： 1） 隨著灰分的增多，爐膛密相區(qū)溫度降低。 2） 在爐膛密相區(qū)加入隔墻，密相區(qū)一側(cè)給煤，另一側(cè)循環(huán)灰返回爐膛，成功的解決 了劣質(zhì)煤的燃燒問題 ，可以燃燒 發(fā)熱量在 12MJ/kg ~4MJ/kg的劣質(zhì)煤 。 在該方案中，發(fā)熱量 為 5MJ/kg 的煤矸石 可以得到很好燃燒 。 關(guān)鍵詞 ： 工業(yè)鍋爐 ,循 環(huán) 流化床 ,劣 質(zhì) 燃料 ,鍋爐設(shè)計 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） ABSTRACT II ABSTRACT With the increasingly intensity of coal utilization and the increasingly strictness of emission regulations in China, The utilization of Lowcalorie fossil fuels such as coal gangue is more and more confined .With extensive fuel range、 high efficiency and low gas emission ,CFB boiler will inevitably bee the main development direction of industrial boiler. Due to the current domestic industrial CFB boiler’s fuel mostly above 12MJ / kg, The research of poor quality fuels less than 12MJkg involves less. With coal quality declines, less heat and more ash it generates, which lead to low bustion efficiency,serious pipe wear and bustion instability. Against these problems, our laboratory puts forward a new technology which is used to bust poorquality coal， the main difference is the Circulating Fluidized Bed boiler has a partition in the lower furnace. The author pletes the putation of material balance and thermal balance with the supervision of his tutor. Based on this a design of 35t/h LowCalorie Coalfired Industrial CFB Boiler is put forward .Through the design principle of the analysis and parison of different quantitative parameters, we propose the optimal scheme. Then the author goes on Thermodynamic calculation with the software in the laboratory. According to the results, the author designs the specific structural design and draw up the boiler with the CAD software. The main calculations show that: 1) With increases in ashes, the temperature of lower furnace declines. When ash content exceeds 68%,the temperature of lower furnace is below 850℃ ,thus is unable to sustain stable bustion in the lower part. 2) In dense phase area joins furnace partition, one side to give coal and another side to give circulation ash, thus successfully solves the problem of poorquality coal bustion. it is available to burn such poorquality coals those their heat value range from 12MJ to 4MJ per kilogram. 3) After thermodynamic calculation and design scheme， the scheme of 35t/h Industrial Circulating Fluidized Bed Boiler is put forward. In the scheme the coal gangue of 5MJ/kg calorific value has a good bustion state. 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） ABSTRACT Ⅲ Key words： Industrial Boiler, Circulating Fluidized Bed, Poorquality Coal， Boiler Design 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 目 錄 Ⅳ 目 錄 摘 要 ................................................................................................................. I ABSTRACT .......................................................................................................II 1 引 言 ............................................................................................................ 1 ................................................ 1 .............................................. 1 .............................................. 2 2 國內(nèi)外劣質(zhì)煤燃燒技術(shù) ........................................................................... 1 ...................................... 1 ........................................................ 1 ............................................................... 1 ............................................................... 5 ............................................................... 5 .................................................... 6 ........................................................ 7 ................................... 8 ................................. 8 新型 低熱值循環(huán)流化床燃燒技術(shù) 及作者所做的研究工作 ................. 9 3 低熱值循環(huán)流化床工業(yè)鍋爐方案設(shè)計論證 .................................... 10 化床工業(yè)鍋爐原則性方案 .............................. 10 ..................................................... 10 ....................................................................... 10 鍋爐熱效率與熱平衡 ........................................................................11 ...............................................................................11 .............................................................................. 14 ................................................... 15 ....................................................................... 15 ....................................................................... 16 .............................................................................. 16 ....................................... 16 ........................................................................... 17 .................................................. 19 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 目 錄 Ⅴ ........................................ 20 .................