Refuse landfill biogas collection pipeline structure and biogas collection method

Abstract

The invention discloses a refuse landfill biogas collection pipeline structure and a biogas collection method. The structure comprises a plurality of gas wells perpendicularly mounted in a backfilling pile and communicating pipes communicating different gas wells, wherein two ends of each communicating pipe are connected with two different gas wells respectively, and the middle of each communicating pipe is an upwards arched arc. The middle of each communicating pipe is arched to form an arch shaped like an arch bridge, two ends of each communicating pipe are fixed to adjacent gas wells, so that biogas can circulate among the gas wells, the gas wells can support the communicating pipes, the condition that the middle of each communicating pipe downwards bends and deforms can be avoided, production of ponding water is avoided, the circulation capability of pipelines is further ensured, and accordingly, evacuating equipment can advantageously extract biogas more rapidly and stably in an energy-saving manner. besides, the problems about waste and safety due to accumulation of biogas are solved, the replacement demands of pipelines can be greatly reduced, and the production cost is reduced; water left in the arc communicating pipes can circulate and flow back to the gas wells at two ends, the humidity of landfill piles is increased, and better gas producing environments are provided.

Description

technical field [0001] The invention relates to biogas collection equipment, in particular to a pipeline structure for biogas collection in a garbage landfill and a method for collecting biogas. Background technique [0002] Garbage landfill is a place where garbage is piled up under the sanitary landfill method. Garbage sanitary landfill is widely used in China because of its low cost and good sanitation. As the landfilled waste degrades, a large amount of biogas will be generated. In order to reduce pollution and improve energy utilization, the biogas needs to be recycled. like figure 1 As shown, biogas recovery in landfill generally needs to cover the surface of the landfill with a geomembrane 101 so that the biogas is not easy to overflow. At the same time, several vertical gas wells 102 are installed at a certain distance in the landfill. geomembrane, and adjacent gas wells are communicated through horizontal pipes 103 . In this way, with the degradation of the landf...

AI Technical Summary

Problems solved by technology

When the stagnant water is generated, the pipeline will be blocked, the gas will not flow smoothly, the efficiency of the gas extraction device will be greatly reduced, and even the biogas in some pipelines will dry up, while the biogas in the other part of the pipeline cannot be extracted

In order to solve this problem, the blocked pipe must be inspected and replaced, resulting in great waste and increased cost

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