| As a very practicability ecologic engineering to benefit nation and abundant peoples, the rural biogas engineering is to be a high-speed developing particular period near years. that is greatly to be place importance on each place and universal received in vast rural area. Near years, the rural biogas engineering is arranged by Guizhou province as the must to finish working for the peoples that is "one of tens actual works". It is developing with 10 to 20 ten thousand digesters in Guizhou province. As a result of the rural biogas engineering to be provided with the characteristic of large-area spreading and constructing. So any a little technological innovation will bring about a important influence to quality of building and effect of spreading and application.The rural biogas engineering is a practical engineering witch to build the installations work done by hand, using microorganism anaerobic to digest technology, to deal with organic matter to reach expecting effect and at the same time to obtain one flammability gas-biogas. It to include microbiology,constructing,mechanical engineering,chemical industry and so on. The airtight installation to deposit organic matter witch be fermented by microorganism and making biogas, we call it biogas digester in China. As the main body equipment of anaerobic fermenting, the design and building for biogas digester will influence effect of biogas producing. Near years, to suit the demand of high-speed developing rural biogas engineering, large-scale rural biogas engineering technical hard work around the biogas digester that looking simple, in order to raise producing biogas effect and to extend life of using, in every where, the rural biogas engineering technical according to the characteristic that including different climates landforms,agricultures and animal husbandry developing mode,biogas raw materials and ecological agriculture developing mode and so on, they are making a lot of improvements and experiments on structure improvement design and building technology of rural biogas digester.For the rural biogas engineering research and building in Guizhou province, the time is urgent and the duties is layers and the special design & research setup is lack. This study is even though to analyse and compare the merits and demerits of structure and function of rural biogas digester to popularize over the years in Guizhou province, it is on the base that in fully recognized the biogas ferment technique and the basic demand biogas digester structure design, to refer to the nation standard drawings of hydraulic biogas digester structure, to use mechanical engineering design thinking, to use the analysis way of comparison optimization. To use as a important aim of improvement for "multifunction and high efficiency" reform type biogas digester of popularing and using in Guizhou province near years, to be directed against the fail of traditional mechanical mixing fashion for difficult to control and lack of power and have many failure and to mix not worth with traditional backflow by force. Need to use new mixing method to improve the effect of mixing and agitating, to improve crusting and to increase efficiency of producing biogas. This thesis first bring up the new method—"injection liquid to mix by two-way pump"; moreover for the biogas digester of after improvement, to confirm the construction scheme of steel mold for building the biogas digester and design parameter of main components and parts, to carry out necessary analyzing and count and construction design main components and parts. This study have same practical import and may provide some accordance for step optimizing of "multifunction and high efficiency" biogas digester, for trying to carry building the digester by steel mold, in order to improve quality and speed of building digester and to extend life-span of biogas digester. |
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