工业锅炉节能毕业论文中英文资料外文翻译文献.docx

工业锅炉节能 中英文资料外文翻译文献 专业英文资料 Boiler energy saving Industrial boiler energy saving technology related to many what is the mostimportant increase industrial furnace thermal utilization ratio of pot namelyincreasing the thermal efficiency of the industrial boiler. This section from burningtransportation line maintenance new technology and new equipment and theapplication of the industrial boiler auxiliary equipment of energy saving pot boilerwater processing etc and the industrial boiler room way of energy saving is discussedin this paper. 1. The furnace of industrial boiler furnace arch arch is very important. The role isto make arch furnace chamber of the mixture of gases and radiation and hot gasorganization flow to make the fuel and ignition and combustion when. Sua and atpresent industrial boiler with the actual YongQiLiang rated load are often not withhorse the use of coal changes greatly and often have large design coal poor vision soin actual use often to furnace necessary improvement in arch coal need to becomfortable. For transformation of the former furnace arch situation the existing problem is:for the use of coal and coal than design poor miscellaneous boiler flue gastemperature appear the chamber exports low about 700 more than 200 designlow. The new coal fire late often appear fire bed broken fire fire from about 0.6 coal disc 1 cm furnace combustion is not strong ash high carbon content. Accordingto the problems furnace arch structure from improving the ignition of fuel conditionsand raise the temperature of boiler furnace to reform. After improvement furnace arch in actual shipped in from the observed thetransformation effect is good people away from coal furnace fuel after disc 0.3 MRPon fire fire bed combustion intense flame full of degree good strong rotation. Due tothe lower arch before after extended arch the arch of the throat and mouth shapebetween into space from the original 2 cm or so down to 1 cm. To strengthen thedisturbance of the air mixed to form the airflow strengthen the furnace combustionimprove the efficiency of the district and the whole arch before furnace temperaturemake its reach to 1400 above improved the ignition of fuel conditions. Coal in theignition of furnace temperature rise make the carbon content and ash significantlyless. The flue gas mixture and strengthen the hydrocyclone separation of flue gascarbon particles needed to fall in the fire bed and new fuel layer further burns out. 2. The reasonable air supply and regulation In the chain furnace the furnace the furnace of reciprocating vibration accordingto the different characteristics of the combustion process reasonable air supply topromote the furnace combustion is very important. As in the chain furnace along withfuel keep movement which in turn happen on fire burning and burn the stage.Burning along the length direction is the stoker stages zoning so along the lengthdirection along the air quantity is also different. The preheating zone along the headand tail burn stage air requirements small The burning along the middle stage airrequirements. According to this characteristic must use block supply air to meet theneeds of the burning. The current domestic production of the boiler although all are to 13consider this one characteristic with the wind in subsection room and equipped withair inlet adjustment. But according to the survey. 3. The secondary air Second wind to strengthen the air combustion is very effective. Second windhave the following function: 1 strengthen the furnace of air disturbance and mixed make the furnace ofoxygen and flammable gas mixture evenly make chemical dont fully burning lossand the chamber excess air coefficient reducing. 2 secondary air in furnace flue gasvortex formed on the one hand extended the suspension fine coal grain in thechamber of a stroke increase the fine particles suspended furnace in the residencetime of make it have a full time to burn make not complete combustion heat lossAnother result of air separation of spiral effect make coal dust grain and the grainre-blows rejection within and reduce the small fly ash escape from the quantity themechanical incomplete combustion heat loss. 英译汉 14 锅炉的节能 工业锅炉的节能技术涉及多方面 最主要是提高工业锅炉的热能利用率 即提高工业锅炉的热效率。本节从燃烧、运行维护、新技术及新设备的应用、工业锅炉辅机的节能、锅 炉水处理等方面 对工业锅炉房的节能途径进行探讨。 1. 炉拱工业锅炉的炉拱是十分重要的。炉拱的作用在于促使炉膛中气体的混合以及组织辐射和炽热烟气的流动 使燃料及时着火燃烧。 而目前工业锅炉的实际用汽量与其额定负荷往往不匹配 使用的煤种变化较大 而且与设计煤种往往有较大的差异 因此在实际使用中 往往要对炉拱进行必要的改造以适应煤种的需要。 为改造前炉拱情况 存在的主要问题是:因使用 的燃煤比设计煤种差而杂 锅炉出现炉膛出口烟气温度低 约 700 比设计低 200 。新煤着火迟 时常出现火床断火 着火距煤闸板约 0.61.O m 炉膛燃烧不强烈 灰渣含碳量高。针对炉拱结构存在的问题 从改善燃料的着火条件 提高炉膛温度着手对锅炉进行改造。经过改造后的炉拱 在实际运衍中观测发现 改造效果良好 燃料人炉后距煤闸板 0.3MRP 着火 火床燃烧强烈 火焰充满度好 旋转强烈。由于前拱降低 后拱加长 拱间形 成的喉口间距由原来的 2 cm 左右缩小到 1cm 。加强了该处 的气流扰动混合 重新组织了气流强化了炉内燃烧 有效的提高了前拱区和整个炉膛的温度使其达到 1400以上改善了燃料的着火条件。煤着火点的提前 炉膛温度的提高使灰渣含碳量明显减少。 烟气的旋流混合又加强了烟气中焦 炭粒子的分离 使之落在火床上和新燃料层进一步燃尽。 强烈的烟气旋流还使烟气中的 CO 、 H2 、 CH4 等可燃气体充分燃 烧 从而提高了锅炉的热效率 4 以上。同时也提高了锅炉出力满足了生产用汽的需要减轻了环境污染扩大了燃煤品种的适应范围。 2. 合理的送风与调节 在链条炉、振动炉、往复炉中根据燃烧过程的不同特点合理的送风对于促进炉内燃烧是很重要的。 如在链条炉中 燃料随炉排不停地运动依次发生着火、燃烧、燃尽各阶段。燃烧是沿炉排长度方向分阶段、分区进行的 所以沿炉排长度方向所需的空气量也就不同。在炉排头部的预热 区和尾部燃尽阶段空气需要量小；在炉排中部的燃烧阶段空气需要量大。根据这一特点必须采用分段送风 以满足 燃烧的需要。目前国内生产的锅炉虽然都考虑到这一特性采用了分段风室 并装有调节风门。但据调查 不少单位在实 际运行中没有按照燃烧特性进行风量调节从而使燃烧所需 要的空气量与实际供风量没有