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CN-224208771-U - Landfill gas guide and discharge system for landfill side slope

CN224208771UCN 224208771 UCN224208771 UCN 224208771UCN-224208771-U

Abstract

The utility model relates to the technical field of sanitary landfill of household garbage, in particular to a landfill slope landfill gas guide and discharge system, which comprises a gas collecting well, a gas guide blind ditch and a connecting blind ditch, wherein the center of the gas collecting well is fixedly connected with an HDPE gas guide pipe, the influence of the slope area on the drilling depth of the conventional gas collecting well is eliminated, the gas guiding effect of landfill gas of the slope area is greatly enhanced, meanwhile, the defect of limited coverage range of the conventional gas collecting well can be overcome, the gas guiding blind ditch can be flexibly arranged according to the site topography, slope gradient change and the like, the gas guiding coverage range is large, the whole device is simple in construction and reliable in structure, the risk of damage of the conventional gas collecting well to the seepage-proofing structure at the bottom of the slope is reduced, and the safe and stable operation of a landfill gas guiding and discharging system is facilitated.

Inventors

  • CUI JING
  • HAN HUI
  • ZHOU MAO
  • LIU YAN
  • XIE HUAMING
  • HUANG BING
  • Yi Chuxuan
  • ZHANG KAIJUN
  • LUO DAN
  • LIU WEIWEI
  • QIN HUI
  • LI GUIPING

Assignees

  • 湖南现代环境科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250603

Claims (7)

  1. 1. The landfill gas guide and drainage system for the landfill slope comprises a gas collecting well (1), a gas guide blind ditch (5) and a connecting blind ditch (6), and is characterized in that a gas guide solid pipe (110) is fixedly connected to the center of the gas collecting well (1), a pipe connecting piece (104) is fixedly connected to the bottom of the gas guide solid pipe (110), a perforated pipe (105) is fixedly connected to the bottom of the pipe connecting piece (104), an iron wire net (109) is arranged on the outer wall of the perforated pipe (105), graded pebbles (108) are filled between the inner wall of the iron wire net (109) and the outer wall of the perforated pipe (105), and a plug (102) is fixedly connected to one side, far away from the pipe connecting piece (104), of the gas collecting well (1).
  2. 2. A landfill gas guide and exhaust system according to claim 1, wherein the outer wall of the gas guide solid pipe (110) is contacted with compacted clay (106), and the top of the compacted clay (106) is contacted with a covering impermeable structure layer (3).
  3. 3. The landfill slope landfill gas guide and exhaust system of claim 2, wherein the compacted clay (106) is fixedly connected with a gas guide well peripheral geotextile (107), the gas guide well peripheral geotextile (107) is contacted with a garbage pile body (4), and the bottom of the garbage pile body (4) is contacted with a slope and a reservoir bottom anti-seepage structure (7).
  4. 4. A landfill gas guide and drainage system of a landfill side slope according to claim 3, wherein the bottom of the side slope and reservoir bottom seepage prevention structure (7) is contacted with a reservoir bottom foundation layer (8), and the top of the covering seepage prevention structure layer (3) is contacted with a covering structure layer (2).
  5. 5. The landfill gas guide and exhaust system for the landfill side slope is characterized in that a detection sampling port (101) is fixedly connected to the gas guide real pipe (110), one side, far away from the pipe connecting piece (104), of the connecting blind ditch (6) is fixedly connected with one side, close to the connecting blind ditch (6), of the gas guide blind ditch (5), and one side, far away from the gas guide blind ditch (5), of the connecting blind ditch (6) is fixedly connected with the gas collecting well (1).
  6. 6. The landfill gas guide and drainage system for the landfill side slope is characterized in that grading pebbles (108) are filled in each of the gas guide blind ditch (5) and the connecting blind ditch (6), two geotechnical cloth (601) on the periphery of each of the gas guide blind ditch (5) and the connecting blind ditch (6) are fixedly connected with one side, far away from the connecting blind ditch (6), of each of the gas guide blind ditch (5), and one geotechnical cloth (501) on the periphery of each of the blind ditches is fixedly connected with the other side, far away from the connecting blind ditch (6).
  7. 7. The landfill gas guide and exhaust system for the landfill side slope is characterized in that one side, far away from the gas guide blind ditch (5), of the connecting blind ditch (6) is fixedly connected with the perforated pipe (105), the gas guide solid pipe (110) is fixedly connected with a gas guide branch pipe (103), one side, far away from the gas guide solid pipe (110), of the gas guide branch pipe (103) is fixedly connected with a gas guide dry pipe (9), the gas guide dry pipe (9) is fixedly connected with a condensate simple guide and exhaust device (10), and one side, close to the condensate simple guide and exhaust device (10), of the gas guide dry pipe (9) is fixedly connected with a landfill gas treatment device (11).

Description

Landfill gas guide and discharge system for landfill side slope Technical Field The application relates to the technical field of sanitary landfill of household garbage, in particular to a landfill gas guide and discharge system for a landfill site side slope. Background The landfill gas is a gas generated by anaerobic digestion and degradation of a large amount of organic matters contained in the piled or landfilled municipal domestic waste, the main components of the landfill gas comprise methane (30% -40%), carbon dioxide (40% -50%), a small amount of ammonia, hydrogen sulfide, nitrogen and trace volatile organic matters (including chlorinated hydrocarbons, methyl mercaptan, benzene series and the like), and the landfill gas is collected through a gas collecting well, a gas collecting tube, a fan and the like, conveyed to the tail end for combustion power generation or concentrated combustion treatment by a torch combustion device, so that the safety of the landfill gas is ensured. In view of the above related art, the inventor finds that the bottom-to-bottom distance of the bottom of the field in the prior art is not suitable to be less than 5m, and for a landfill side slope area, the influence of the side slope can cause poor air guiding effect, meanwhile, the landfill boundary shape is irregular, the gas collecting well is difficult to cover the landfill irregular or corner area, and the risk of damaging the impermeable structure of the field exists. Disclosure of utility model In order to enhance the landfill gas guiding and discharging effect of irregular areas, side slope areas or corner areas of a landfill, and overcome the problems existing in the prior art of singly adopting gas collecting well guiding and discharging, the application provides a landfill side slope landfill gas guiding and discharging system. The application provides a landfill gas guide and drainage system for a landfill side slope, which adopts the following technical scheme that the landfill gas guide and drainage system comprises a gas collecting well, a gas guide blind ditch and a connecting blind ditch, wherein a gas guide solid pipe is fixedly connected to the center of the gas collecting well, a pipe connecting piece is fixedly connected to the bottom of the gas guide solid pipe, a perforated pipe is fixedly connected to the bottom of the pipe connecting piece, an iron wire net is arranged on the outer wall of the perforated pipe, graded pebbles are filled between the inner wall of the iron wire net and the outer wall of the perforated pipe, and a plug is fixedly connected to one side, far away from the pipe connecting piece, of the gas collecting well. Optionally, the outer wall of the air guide solid pipe is contacted with compacted clay, and the top of the compacted clay is contacted with a covering impermeable structure layer. Optionally, the compacted clay is fixedly connected with geotextile around the gas-guide well, the geotextile around the gas-guide well is contacted with a garbage stack body, and the bottom of the garbage stack body is contacted with a slope and a reservoir bottom seepage-proofing structure. Optionally, the bottom of the side slope and the bottom impermeable structure is contacted with a bottom foundation layer, and the top of the covering impermeable structure is contacted with a covering structure layer. Optionally, the real pipe fixedly connected with of air guide detects the sampling mouth, connect one side that the blind ditch kept away from the pipe connection spare and the blind ditch of air guide be close to one side fixed connection who connects the blind ditch, connect one side that the blind ditch kept away from the blind ditch of air guide and gas collecting well fixed connection. Optionally, grading pebbles are filled in the air guide blind ditch and the connecting blind ditch, the outer walls of the air guide blind ditch and the connecting blind ditch are fixedly connected with a blind ditch peripheral geotechnical cloth II, and one side, far away from the connecting blind ditch, of the air guide blind ditch is fixedly connected with a blind ditch peripheral geotechnical cloth I. Optionally, one side of connecting the blind ditch and keeping away from the air guide blind ditch is fixedly connected with the perforated pipe, the real pipe fixedly connected with air guide branch pipe of air guide, one side fixedly connected with air guide trunk pipe of the real pipe of air guide is kept away from to the air guide branch pipe, the simple and easy guide and exhaust device of air guide trunk pipe fixedly connected with condensate, one side fixedly connected with landfill gas processing apparatus that the air guide trunk pipe is close to the simple guide and exhaust device of condensate. In summary, the application has the following beneficial technical effects: 1. The utility model has the advantages that the gas collecting well, the gas guiding blind ditch, the connecting blind ditch