SHL35-25-型锅炉设计毕业设计说明书.doc

设计题目---SHL35-2.5-A型锅炉设计 摘 要 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、省煤气。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，锅炉出口布置燃尽室达到飞灰和降尘作用；采用铸铁省煤器，来达到降低排烟温度的要求。 关键词　热力计算；强度计算；烟风阻力计算 Design of SHL35-2.5-A boiler Abstract This design is for SHL35-2.5-A low-pressure boiler burning coal. This design is in the site visit, and on the basis of consulting a large number of documents and the information, combined with the major knowledge, the overall layout of boiler and comprehensive thermodynamic calculation. In order to master the design calculation method and the general calculation steps. The boiler general structure with double pot horizontal cylinder decorate, up to and including flue chamber slag tube two parts, the arrangement of vertical downside flue economizer and two levels of tubular air preheater, boiler hearth all be full of light pipe water wall. Design in line with the safety and reliability of the boiler operation for the primary design characteristics of the standards. Comprehensive consideration of the combustion, heat transfer, flue gas and air and working medium of the dynamic properties and wear and corrosion. In the process of boiler design, the main factors that fire is furnace hearth, there is enough heat radiation, coal burns out degree and the smoke of reasonable speed and smoke exhaust temperature. At the same time, to ensure the has certain air tightness to ensure that within the negative pressure combustion chamber. In the design process as a technical support for the thermodynamic calculation, strength calculation and smoke wind resistance calculation. Thermal calculation of the furnace slag, including pipe, the boiler over, province the gas and air preheater. In order to make small boiler compact structure, most of the heating surfaces are decorated in the chamber. According to the structure, boiler room decorate export burn to fly ash and dust role;