Lifting device and lifting method for landfill gas well

Abstract

The invention provides a lifting device and a lifting method for a landfill gas well. The lifting method comprises the following step of: using a protecting barrel made of support rod frames and a protective screening for integrating the support rod frames as an enclosure of a well tube of the landfill gas well, and welding the well tube to lengthen and lift the well tube before landfilling the gas well; and additionally installing one protecting barrel made of the support rod frames and the protective screening on the welded well tube, and adding broken stone in the protecting barrel to achieve the purposes of protecting and lifting the gas well. Because the gas well lifting protecting barrel made of the support rod frames and the protective screening has the advantages of simple structure, low cost and easy manufacturing and installation, a plurality of protecting barrels can be used in the lifting process of the gas well to lift the gas well, the step of pulling out the original protecting barrel for recycle is omitted, a large amount of manpower and material resources is saved, and the lifting of the landfill gas well is more efficient and saves more energy.

Description

technical field [0001] The invention relates to the field of landfill technology, more specifically, to a lifting device and a lifting method for a gas well of a landfill gas. Background technique [0002] At present, domestic sanitary waste landfills generally implement a landfill operation method of divisions and layers. The height of each layer of landfill waste is generally 3 meters. After each layer of waste is filled, it is paved, compacted and covered, and then the second layer of waste landfill. When the area garbage height reaches more than 10 meters, it can be transferred to another area for landfill operation. In this way, extraction gas wells can be laid in areas where landfill operations are suspended. However, after a period of regional dumping, it is necessary to refill the area where the gas wells are arranged. If the gas well is not lifted at this time, as the landfill height increases, the leachate in the garbage will fill the gas well, and the pressure ...

AI Technical Summary

Problems solved by technology

The cement flower tube used in the cement flower tube enclosure method can only be used once, the input cost is high, and the cement flower tube is difficult to carry, which increases the difficulty of construction

Although the steel pipes used in the steel pipe casing lifting method can be reused, they need to be pulled out with an excavator every time, and the workload is relatively large, and the 3-meter-high garbage layer creates great resistance to the pulling of the casing, resulting in some gas wells. The casing cannot be pulled out, which not only wastes the casing, but also causes the part of the casing of the gas well to fail to pump gas, and the purpose of lifting the gas well cannot be achieved

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