Method and system for leakage status evaluation and leaks location of solid waste land disposal facility

Patent metadata

Field	Value
Publication number	US-2022011191-A1
Application number	US-202117370064-A
Country	US
Kind code	A1
Filing date	Jul 8, 2021
Priority date	Jul 10, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

A method and system for leakage status evaluation and leaks location of a solid waste land disposal facility. The method includes: arranging an off-site emitting electrode for the solid waste land disposal facility, and arranging a plurality of intra-site receiving electrodes on a solid waste pile surface in a grid shape; selecting a power supply to collect a current value between the off-site emitting electrode and each of the intra-site receiving electrodes respectively, and determining a maximum current value point Mn of the solid waste pile surface and a maximum current value An; selecting an off-site point So2, and measuring a current value between the off-site emitting electrode and the point So2 as a reference current Ab under the same power supply condition; and determining a leakage status of the solid waste land disposal facility based on a ratio of the maximum current value An to the reference current Ab.

First claim

1 . A method for leakage status evaluation and leaks location of a solid waste land disposal facility, the method comprising:
arranging an off-site emitting electrode for the solid waste land disposal facility, and arranging a plurality of intra-site receiving electrodes on a solid waste pile surface in a grid shape; selecting a power supply to supply power, collecting a current value between the off-site emitting electrode and each of the intra-site receiving electrodes respectively, and determining a maximum current value point Mn of the solid waste pile surface and a maximum current value An; selecting an off-site point So2, and measuring a current value between the off-site emitting electrode and the point So2 as a reference current Ab under the same power supply condition; and determining a leakage status of the solid waste land disposal facility based on a ratio of the maximum current value An to the reference current Ab.

2 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 , wherein if there is a leakage in the solid waste land disposal facility, a position of the maximum current value point is a damaged position.

3 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 , wherein the selecting a power supply to supply power and collecting a current value between the off-site emitting electrode and each of the intra-site receiving electrodes respectively specifically comprises:
connecting two ends of the power supply to an off-site electrode and a first intra-site electrode respectively, and collecting a current I 11 ; and keeping the end of the power supply connected to the off-site electrode fixed, connecting the other end of the power supply to other intra-site electrodes in sequence respectively, and collecting corresponding current values respectively.

4 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 , wherein the method of determining a maximum current value point Mn of the solid waste pile surface and a maximum current value An comprises:
collecting the current value between the off-site emitting electrode and each of the intra-site receiving electrodes respectively, and determining a region where a maximum current value point AMAX1 is located; arranging a plurality of receiving electrodes in a grid shape again in the region where the maximum current value point is located, and determining a maximum current value point AMAX2, the grid spacing of the present arrangement being smaller than the grid spacing of the first arrangement; judging whether a distance between the point AMAX1 and the point AMAX2 is smaller than a set value, if so, recording a final maximum current value, otherwise, arranging a plurality of receiving electrodes in a grid shape again in a region where the maximum current value point AMAX2 is located, and determining a maximum current value point AMAX3, the grid spacing of the present arrangement being smaller than the grid spacing of the previous arrangement; and judging whether a distance between the point AMAX3 and the point AMAX2 is smaller than the set value, if so, recording a final maximum current value, otherwise, repeating the above process until a distance between AMAXn and AMAXn−1 is smaller than the set value.

5 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 4 , wherein the method of determining a region where a maximum current value point AMAX1 is located comprises:
positioning intra-site electrodes to obtain x and y coordinates of each electrode, interpolating a current value of each electrode to obtain a plane contour map of the current value, and determining the maximum current value point AMAX1 according to the plane contour map of the current value.

6 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 , wherein the method of selecting an off-site point So2 and measuring a current value between the off-site emitting electrode and the point So2 as a reference current Ab under the same power supply condition comprises:
measuring a horizontal distance d between a final maximum current value point and an off-site emitting electrode So1; taking the off-site emitting electrode So 1 as a starting point, and extending the distance d along the direction of a connecting line between the final maximum current value point and the off-site emitting electrode So1 to obtain a point So2; and connecting two ends of the power supply to So1 and So2 respectively, and measuring the current after power supplying, as a reference current value Ab.

7 . The method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 , wherein the determining a leakage status of the solid waste land disposal facility based on a ratio of the maximum current value An to the reference current Ab specifically comprises:
a smaller ratio of the maximum current value An to the reference current Ab indicating a better integrity of an impermeable layer; a larger ratio of the maximum current value An to the reference current Ab indicating a more serious damage and leakage of the impermeable layer; and when the ratio of the maximum current value An to the reference current Ab is greater than 1, indicating that the damage has resulted in a very serious leachate leakage.

8 . A system for leakage status evaluation and leaks location of a solid waste land disposal facility, comprising:
an off-site emitting electrode, arranged for the solid waste land disposal facility, and a plurality of intra-site receiving electrodes, arranged on a solid waste pile surface according to a grid-shaped structure; a power supply, configured to supply power; a data collection module, configured to collect a current value between the off-site emitting electrode and each of the intra-site receiving electrodes respectively, and determine a maximum current value point Mn of the solid waste pile surface and a maximum current value An; a data measurement module, configured to select an off-site point So2, and measure a current value between the off-site emitting electrode and the point So2 as a reference current Ab under the same power supply condition; and a data processing module, configured to determine a leakage status of the solid waste land disposal facility based on a ratio of the maximum current value An to the reference current Ab.

9 . A terminal device, comprising: a processor configured to implement a plurality of instructions, and a computer readable storage medium configured to store the plurality of instructions, wherein the instructions are adapted to be loaded by the processor and to perform the method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 .

10 . A computer readable storage medium, having a plurality of instructions stored therein, wherein the instructions are adapted to be loaded by a processor of a terminal device and to perform the method for leakage status evaluation and leaks location of a solid waste land disposal facility according to claim 1 .

Assignees

• Chinese Res Acad Env Sciences

Inventors

• Xu Ya
• Liu Yuqiang
• Liu Jingcai
• Yao Guangyuan
• Zheng Kaida
• Nai Changxin
• Dong Lu
• Huang Qifei

Classifications

• G01M99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• B09B1/00 Primary

  Dumping solid waste · CPC title

• B09B5/00

  Operations not covered by a single other subclass or by a single other group in this subclass · CPC title

• G01M3/40 Primary

  by using electric means, e.g. by observing electric discharges · CPC title

• G01M3/18 Primary

  for pipes, cables or tubes; for pipe joints or seals; for valves; {for welds; for containers, e.g. radiators} · CPC title