| Energy is a necessary resource of human production, life and the development of social economy. However, In the 21st century, human society are facing the double pressure which comes from the development and energy. As a kind of clean and friendly new energy, biomass's energy characteristics is similar as traditional fossil's,what's more biomass has incomparable advantages in take the place of traditional fossil fuel.Therefore, producing bio-oil by flash pyrolysis will be one of the most development potential technical of this century. In a large production line of extracting bio-oil by flash pyrolysis, it is necessary to design a main set of steel structure which is safe and economical.But the process production line of producing bio-oil is special and the spatial layout of the device is complex, load device is diversiform, so we can not copy completely from Code for Design of Steel Structures to design that.This paper is a supporting research of the projects which belongs the national "11th five-year" 863 high-tech task named "Skewed-slot Low Energy Fine Control Heating of Biomass Bio-oil by Flash Pyrolysis and Hybrid Emulsion Fuel New Technology". Design the scheme of the steel structure after collecting, consulting abundance of literature material relevant the design principle of steel structure,refer to predecessor's design experience and method, what's more, it combine with the practice of engineering projects and other parts of the related research topics, according to the regulations and standards。Using the ANSYS finite element analysis software, calculated and optimized the design schemes.The design of steel structure which can produce 1000t bio-oil annually is frame structure, the frame structure is divided into eight layer, and its highest height is 20.710 m, constitute of four root pillar and several primary and secondary beams form by various connection ways, and its materials were H section of Q345 steel, the main set equipment were installed in the steel structure of the primary and secondary beams of different bearing layer through the ear seat, supporting frame. We got steel structure framework node design map, node feet elevation layout, column footing and 3D modeling figure. This paper also proceed finite element analysis of the statics, considered maximum load condition combination about the design scheme, got stress and strain displacement data of the steel structure's frame.Analyzed data show that the maximum stress and strain are in regulating permitted range while safety performance is too high.So optimized the design schemes and made the steel structure lighter 18.34%.The whole steel structure meets the safety reliability and economical efficiency requirements,and it provides theoretical basis for subject's processing and manufacturing.
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