Landfill leachate guiding and discharging system

Abstract

The invention discloses a landfill leachate guiding and discharging system, and relates to the technical field of landfill leachate guiding and discharging. The system comprises a partition dam arranged in a landfill and used for dividing the landfill into a plurality of landfill areas, a main guiding and discharging ditch, secondary guiding and discharging ditches, multiple main guiding and discharging pipes, secondary guiding and discharging pipes, a collection well and a pumping and discharging pipe. The main guiding and discharging ditch is arranged at the bottom of a landfill and penetrates through the landfill areas and the partition dam, and one end of the main guiding and discharging ditch is higher than the other end; the secondary guiding and discharging ditches are formed at thetwo sides of the main guiding and discharging ditch and arranged at a slope toe of a side slope of the landfill, and one end of each secondary guiding and discharging ditch is higher than the other end; the plurality of main guiding and discharging pipes are arranged at the bottom of the main guiding and discharging ditch; the secondary guiding and discharging pipes are arranged at the bottoms ofthe secondary guiding and discharging ditches; the collection well is arranged at the slope toe of the side slope at the end, close to the main guiding and discharging ditch, of the landfill, and iscommunicated with the other ends of the main guiding and discharging pipe and the secondary guiding and discharging pipes; one end of the pumping and discharging pipe is arranged in the collection well; and the guiding and discharging system can achieve partitioned guiding and discharging of landfill leachate, the guiding and discharging pressure of all the guiding and discharging pipes is reduced, the guiding and discharging system is provided with the secondary guiding and discharging pipes, and effective guiding and discharging of the leachate can be further ensured.

Description

technical field [0001] The invention belongs to the technical field of landfill leachate drainage, and more specifically relates to a landfill leachate drainage system. Background technique [0002] As the final place for solid waste disposal, landfills solve the problem of final disposal of municipal solid waste. At this stage, most of the domestic landfill leachate drainage systems are designed to guide the main blind ditch and the branch blind ditch together. A HDPE flower pipe is installed in the main blind ditch and the branch blind ditch, and HDPE is installed in the branch blind ditch. The flower pipe is connected to the HDPE flower pipe of the main blind ditch, and the leachate is guided and drained to the main blind ditch through the branch blind ditch, and finally guided to the regulating pool. The operation period of the landfill is generally more than 10 years. During the long-term operation, the CaCO in the leachate and the guide pebbles or crushed stones 3 Th...

AI Technical Summary

Problems solved by technology

The operation period of the landfill is generally more than 10 years. During the long-term operation, the CaCO in the leachate and the guide pebbles or crushed stones 3 The chemical reaction will produce cement-like cementitious substances, which will cause fouling of the drainage pipes; coupled with the continuous deposition of fine particles in the leachate, the main blind ditch in the leachate drainage system will easily be partially blocked or completely silted up. Blocking

Once the main blind ditch for leachate drainage becomes clogged, the branch blind ditch above the clogging point and the main blind ditch will lose the drainage effect of the leachate collection well, and it is difficult to determine the location of the clogged pipeline, so it needs to be dredged and repaired The difficulty is high, resulting in the inability of the leachate in the garbage dump to be quickly and effectively guided, and the long-term deposition in the dump causes the water level to be too high, which affects the safety and stability of the garbage dump

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