SHL20-16-A型锅炉设计.doc

论文题目---SHL20-1.6-A 型锅炉设计 摘 要 锅炉作为一种能源转换设备，在工业生产中得到了广泛的应用。它通过煤、石油或天然气的燃烧放出的化学能，并通过传热把热量传递给水，使水加热（或变成蒸气），热水直供给工业生产和民用生活、供暖，所以锅炉的主要任务是：把燃料中的化学能最有效的转变为热能。 本次的毕业设计的题目是，属于锅炉。设计本着锅炉运行的安全性和可靠性为首要设计特性的准则。综合考虑燃烧，传热，烟气和空气以及工质的动力特性以及磨损和腐蚀。在锅炉设计的过程中，主要考虑的因素是保证炉内着火，炉膛内有足够的辐射热量，煤的燃尽程度以及合理的烟气速度和排烟温度。同时，还要确保有一定的气密性以保证炉膛内进行负压燃烧。 在整个设计过程中作为技术支持进行了热力计算、强度计算和烟风阻力计算。其中热力计算包括炉膛、、锅炉管束、省煤。为了使小型锅炉的结构紧凑，大部分受热面都布置在炉膛内。根据结构，锅炉出口布置达到飞灰和降尘作用；由于工作压力低，容易产生烟气侧的酸腐蚀和锅内的氧腐蚀，所以采用省煤器，来达到降低排烟温度的要求。 利用CAD,完成了锅炉总图、 炉墙图、上锅筒展开图、本体图。 关键词　热力计算强度计算烟风阻力计算 Design of SHL20-1.6-A boiler Abstract Boilers as an energy conversion equipment, in industrial production has been widely used. It does this by coal, oil or natural gas combustion release of chemical energy, and heat the heat transfer through the water, the water heating (or into steam), hot water direct supply to the industrial production and civil life, heating, so the main boiler mandate: to fuel the chemical energy into heat energy the most effective. The graduation project topic is shl20-1.6-a, belonging to the natural circulation water tube boiler. Boiler design in line with the safety and reliability of the primary design features of the guidelines. Considering combustion, heat transfer, gas and air as well as dynamic properties of working fluids and wear and corrosion. In the boiler design process, the main consideration is to ensure that the furnace fire, furnace heat radiation sufficient coal burnout degree and a reasonable speed and exhaust gas temperature. At the same time, make sure there is a certain degree of air tightness to ensure negative pressure within the combustion chamber. Throughout the design process as a technical support for the thermodynamic calculation, calculation of strength . Thermal calculation which includes the furnace, burn room, boiler tubes, the provincial gas. For small boilers, compact structure, most of the heating surface are arranged in the furnace. According to the structure, boilers burn room layout export to