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A comprehensive landfill quasi-aerobic stabilization integrated system and its application

A technology for a landfill and an integrated system, which is applied in the field of quasi-aerobic stabilization integrated systems for a comprehensive landfill, can solve the problems of air pollution around the landfill, slow garbage stabilization rate, and low air diffusion efficiency, etc. Achieve the effect of preventing rainwater from entering the landfill layer, achieving rapid stabilization, and weakening the release strength

Active Publication Date: 2018-10-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution published in the above-mentioned patent mainly uses the principle of natural diffusion ventilation, but due to the low porosity and poor uniformity of the primary domestic waste landfill layer, the air diffusion efficiency is relatively low, and the waste stabilization rate is slow; the odor pollution in the landfill gas The waste enters the environment with the ventilation air, which may easily cause air pollution around the landfill.

Method used

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  • A comprehensive landfill quasi-aerobic stabilization integrated system and its application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 As shown, a comprehensive landfill quasi-aerobic stable integrated system, the system includes a landfill layer 2, a leachate collection and drainage layer arranged at the bottom of the landfill layer 2, and a leachate collection and drainage layer The connected leachate collection well 9, the quasi-aerobic landfill air-conducting unit arranged in the landfill layer 2, the leachate reinjection layer 6 arranged on the upper part of the landfill layer 2, and the leachate reinjection layer 6 and the seepage The filtrate collection well 9 is connected to the leachate circulation pipeline, and the landfill layer 2 is formed by mixing primary domestic waste and domestic waste incineration slag.

[0036] Among them, the leachate collection and drainage layer is composed of a porous leachate collection pipe 11 arranged at the bottom of the landfill layer 2. The porous leachate collection pipe 11 is connected to the leachate collection well 9, and the porous leacha...

Embodiment 2

[0047] In this embodiment, the inner diameter of the porous leachate collection pipe 11 is 650mm, the opening ratio of the upper half of the pipe wall is 15%, and the diameter of the seepage hole is 40mm.

[0048] The diameter of the vertical gas guide shaft 1 is 1.6m, the center is a perforated pipe 13, and the outer edge is a steel wire protection net; wherein, the inner diameter of the perforated pipe 13 is 175mm, and the pipe wall of the perforated pipe 13 is uniformly perforated except for each 1m at both ends. The hole diameter is 10mm. The malodorous gas purification packing layer 4 is formed by mixing domestic waste incineration slag, stable domestic waste and gravel in a mass ratio of 1:1:2.

[0049] The cross-sectional area of ​​the leachate collection well 9 is 4m 2 , and the water level of the leachate in the leachate collection well 9 is lower than the leachate collection and drainage layer.

[0050] All the other are with embodiment 1.

Embodiment 3

[0052] In this embodiment, the inner diameter of the porous leachate collection pipe 11 is 500 mm, the opening ratio of the upper half of the pipe wall is 12%, and the diameter of the seepage hole is 20 mm.

[0053] The diameter of the vertical gas guide shaft 1 is 1.2m, the center is a perforated pipe 13, and the outer edge is a steel wire protection net; wherein, the inner diameter of the perforated pipe 13 is 150mm, and the pipe wall of the perforated pipe 13 is uniformly perforated except for each 1m at both ends. The hole diameter is 15mm. The malodorous gas purification packing layer 4 is formed by mixing domestic waste incineration slag, stable domestic waste and gravel in a mass ratio of 4:4:1.

[0054] The cross-sectional area of ​​the leachate collection well 9 is 2.5m 2 , and the water level of the leachate in the leachate collection well 9 is lower than the leachate collection and drainage layer.

[0055] All the other are with embodiment 1.

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Abstract

The invention relates to an integrated type semi-aerobic stabilizing and integrating system for refuse landfill. The system comprises the following components: a landfill layer, a leachate collecting and discharge guiding layer which is arranged at the bottom of the landfill, a leachate collecting well which communicates with leachate collecting and discharge guiding layer, a semi-aerobic landfill gas guiding unit which is arranged in the landfill, a leachate recharging layer which is arranged on the landfill layer, and a leachate circulation pipeline for communicating the leachate recharging layer and the leachate collecting well; the landfill layer is prepared by mixed landfill of raw house refuse and incinerator slags of house refuse. Compared with the prior art, the system has the advantages of integral simple structure, construction convenience, low construction cost, and energy saving and environmental protection; the traditional semi-aerobic landfill technology of raw house refuse is improved, and a semi-aerobic stabilizing process during mixed landfill of raw house refuse and incinerator slags of house refuse is reinforced; and the system has a wide usage range and a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a comprehensive garbage landfill quasi-aerobic stabilization integrated system and its application. Background technique [0002] Domestic waste incineration slag accounts for 15%-25% of waste incineration. my country's "Twelfth Five-Year Plan" national urban domestic waste harmless treatment facility construction plan requires that the proportion of domestic waste incineration should reach 35%, and the newly added incineration capacity is greater than 200,000 tons / day. At present, under the optimal slag utilization conditions, 5%-10% of the metals and organic combustibles in the slag can be sorted and recovered, 80% of the inorganic matter can be used for building material aggregates, and 5-15% of the slag still needs to be landfilled. According to the different conditions of the landfill site and the proportion of slag to landfill, domestic waste incineration sla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02C02F3/30B09B3/00B01D53/22B09B1/00
CPCB01D53/228B01D2053/221B01D2257/90B01D2258/02B09B1/00B09B3/00C02F3/02C02F3/30C02F3/301C02F2301/04Y02E50/30Y02W10/10Y02W30/20
Inventor 章骅何品晶邵立明吕凡夏溢蒲红霞
Owner TONGJI UNIV
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