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农村沼气池,目前多数是用水泥混凝土作建筑材料。混凝土建池有多种做法,如预制件建池、部份井体浇灌、分开井体浇灌、全并整体现浇等几种。采用那一种办法,要因地制宜,不能强求一致,但比较起来,全井整体现浇具有更多的优越性。沼气池尽管是埋置于地下,由于四季气候变化的影响,温湿仍然有差异,致使埋置不同深度的池体,产生胀缩变化,形成了一种内在的拉力;同时地下水的存在,也经常对池体起渗透作用。因此,如果沼气池建得不牢固,或池体各部位存在着自然的衔接缝(冷缝),就容易受到这种外界因素的破坏。产生裂缝,漏水跑气,甚至最终成了“病废池”。混凝土全井体现浇的最大特点,就是沼气池的池墙、池盖、池底,以及进出料的五个主要部位,一次
Most of the rural biogas digesters are made of cement concrete as building materials. There are many ways to build concrete pools, such as prefabricated pools, partial wells, separate wells, and overall cast-in-place. In that way, we must adapt our measures to local conditions and we must not seek consensus, but in comparison, the whole well has more advantages in terms of overall cast-in-place. Although the biogas digester is buried underground, due to the effects of climate change in the four seasons, there are still differences in temperature and humidity, resulting in the embedding of different depths of the pool body, resulting in expansion and contraction changes, forming an intrinsic tension; while the presence of groundwater, also It often infiltrates the pool. Therefore, if the biogas tank is not built well or there are natural joints (cold joints) at various parts of the tank, it is vulnerable to the destruction of such external factors. Cracks occur, leaks and run out of gas, and eventually become a “waste pool.” The most important feature of the concrete wells is the pool walls, pool covers, pool bottoms, and the five major parts of the intake and discharge materials.