240th燃高焦炉混合煤气锅炉设计毕业设计论文.doc
摘要240t/h燃高焦炉混合煤气锅炉设计：（Q低温=1400千卡/标m3)，设计的参数为215的给水温度，540的过热蒸汽温度，140的排烟温度，20的环境温度。本次设计计算了，炉膛，屏式过热器，高温过热器，低温过热器，高温省煤器，高温空气预热器，低温省煤器，低温空气预热器的结构计算和传热计算。以及对烟道阻力的计算和空气预热器的计算，引风机，送风机的选择。炉膛宽度取7.7米，顶棚宽4.675米，顶棚高4.2米，炉膛总高15.785米。屏式过热器取8片，纵向排数27，每片屏并联管子根数为12，第一根屏管高度4.2米，屏高度最大值4.559米，屏的深度为1.244米。高温过热器横向管排数62，纵向管排数8，管长3.329，管簇深度0.76米。低温过热器横向管排数58，纵向管排数16，管长3.2.高温省煤器横向排数97.5，纵向排数26，受热面布置管长6.2。高温空预器横向管排数100，纵向管排数50，管箱高度1.44米。低温省煤器横向排数97.5，纵向排数64，受热面布置管长3.35米。低温空预器横向管排数100，纵向管排数50，管箱高度1.44米。本次设计中，烟气在炉膛出口温度是1295.1，经过屏式过热器烟温下降至1183，在经过高温过热器烟温下降到1032.6，经低温过热器温度下降到832.54，经高温省煤器下降到449，经高温空气预热器降至382，经低温省煤器下降到222，经高温空气预热器降至146.7排烟。本次设计中，水的流程是215给水经低温省煤器加热到260，经高温省煤器加热到319.97，进入汽包，再经下降管，由水冷壁使饱和水变成319.97的水蒸气，经低温过热器将水蒸气加热到425.2，经屏将水蒸气加热到455.87，最后经高温过热器加热到540引出做功。关键字：炉膛，过热器，省煤器，空气预热器。Abstract240t / h burning blast furnace gas boiler design (high mixing coke oven gas: low-temperature Q = 1400 kcal / standard m3) of the graduation project, the design parameters for the feed water temperature of 215 ° C, the superheated steam temperature of 540 ° C, 140 ° C exhaustsmoke temperature, 20 ° C ambient temperature.The design, furnace, screen superheater, superheater high temperature, low temperature superheater, high-temperature economizer, high temperature air preheater, low-temperature economizer, low temperature air preheater of structural calculations and heat transfer calculations. And calculation of flue resistance and air preheater calculation of induced draft fan, blower options.Take chamber width 7.7 meters, the ceiling is 4.675 meters wide, 4.2 meters high ceiling hearth, total 15.785 metres high. Take platen superheater of 8, longitudinal row number 27, every piece of screen the number of 12 parallel tubes, the first root screen pipe height 4.2 meters, screen the maximum height 4.559 meters, the depth of the screen is 1.244 meters. High temperature superheater tube transverse number 62, vertical tube number 8, length 3.329, the depth of 0.76 meters. Low temperature superheater tube for 58 horizontal, vertical tube number 16, length 3.2. High temperature economizer horizontal row number 97.5, longitudinal row number 26, decorate in heating length 6.2. High temperature air preheater horizontal tube number 100, vertical tube number 50, the box height 1.44 meters. Of low temperature economizer horizontal row number 97.5, longitudinal row number 64, decorate in heating tube 3.35 meters. Low temperature air preheater horizontal tube number 100, vertical tube number 50, the box height 1.44 meters.In this design, the flue gas outlet temperature in the furnace is 1295.1 ° C, after the platen superheater flue gas temperature dropped to 1183 ° C after the high temperature superheater flue gas temperature down to 1032.6° C, low temperature air preheater temperature dropped to 832.54 ° C decreased to 449 ° C, high temperature economizer, air preheater at high temperature dropped to 382° C, low temperature economizer decreased to 222 ° C, dropped to 146.7 high temperature air preheater exhaust.In this design, the water flow is 215 water supply by the low-temperature economizer heating to 260 ° C, high temperature economizer heating to 319.97 ° C, into the drum, and then the down pipe, the water wall so that the saturated water into 319.97 ° C steam, low temperature superheater steam heated to 425.2 ° C, the screen will steam heated to 455.87 ° C, and finally by the high temperature superheater heating to 540 ° C leads to acting.Keywords: furnace, superheater, economizer, air preheater.目录摘要1Abstract2绪论61燃气锅炉的特点62燃气锅炉的现状83此次设计燃气锅炉的基本思路9第一章· 设计任务与燃料特性参数101.1设计任务101.2燃料特性10第二章·锅炉整体布置的确定112.1 燃料燃烧计算112.2空气平衡及焓温表132.3锅炉热平衡及燃料消耗量计算152.4燃烧室设计及传热计算162.5炉膛结构尺寸计算182.6燃烧器的布置及主要尺寸 202.6燃烧室结构特性计算212.7炉膛热力计算222.8.炉膛顶部辐射受热面吸热量及工质焓增计算242.9炉膛受热面热力分配252.10屏式过热器结构计算262.11屏区传热计算282.12高温过热器结构计算322.13高温过热器传热计算332.14低温过热器结构计算362.15低温过热器传热计算372.16炉膛受热量的热量分配················································392.17高温省煤器结构计算422.18高温省煤器传热计算 432.19高温空气预热器结构计算452.20高温空气预热器传热计算462.21低温省煤器结构计算492.22低温省煤器传热计算502.23低温空气预热器结构计算522.24低温空气预热器传热计算532.25热力计算汇总表·················································55第三章·阻力计算56第四章·送引风机计算614.1送风机计算614.2引风机计算61第五章·防爆措施62第六章·结论63第七章·参考文献64第八章·附录A65第九章·附录B···························································· 73第十章·附录C·····················································93第十一章·致谢信··························································99 绪论燃气锅炉是一种以可燃气体作为燃料的能源转换设备，用以生产热水或蒸汽，满足工业生产和人民日常生活的需要。本文主要介绍了燃气锅炉的优越性、存在的问题、燃气锅炉的发展现状。燃气锅炉以气体作为燃料，燃料输送方便，计量准确，操控性好，燃气锅炉自动化控制程度高，运行管理工作量小。但是，气体燃料存在爆炸的潜在危险，一旦燃气泄漏，后果不堪设想。因此，对燃气检漏工作要求比较严格。国内燃气锅炉发展比国外慢，但是目前国内的生产厂家已能生产各种规格的燃气锅炉，只是国产燃烧器应用较少 。鉴于目前的能源形势，锅炉的发展方向依然是高参数、大容量，以提高锅炉的效率，达到节约能源的目的。燃气锅炉也不例外，高参数、大容量，也是其发展方向。但是，燃油燃气资源短缺，也在一定程度上制约了燃气锅炉
