CN110695061A - Landfill Rapid Stabilization System - Google Patents

Abstract

The invention discloses a rapid stabilization system for a waste landfill. The bottom of the waste heap is provided with a leachate horizontal guide and drainage system. The guide and drainage system and the leachate irrigation and drainage system are connected to the leachate collection well. One end of the gas extraction and injection pipeline in the gas extraction and injection system is vertically inserted into the garbage heap, the other end is connected with the second control system, and the other end of the second control system is connected with the gas injection fan and the extraction fan. One end of the leachate irrigation and drainage system is vertically inserted into the landfill waste heap, the other end is connected to the third control system, and the other end of the third control system is connected to the leachate drainage pump and the leachate lifting pump. The invention provides sufficient oxygen for the landfill garbage to ensure aerobic biochemical degradation; the leachate recharge makes the landfill a composite "purification reactor", and the nutrients in the leachate can be stored in the garbage heap. Fully circulate, effectively improve the growth and metabolism efficiency of microorganisms.

Description

Landfill Rapid Stabilization System

technical field

The invention relates to the technical field of domestic waste treatment, in particular to a rapid stabilization system for a waste landfill.

Background technique

With the acceleration of urbanization in my country and the improvement of people's living standards, the garbage generated in cities is increasing, posing a threat to the urban ecological environment and the health of residents.

At present, a large number of domestic waste landfills have reached the designed storage capacity and are facing closure. How to carry out ecological restoration and landscape greening, reduce pollution, realize sustainable use of land resources, and provide new and beautiful landscape and recreational space for urban residents has become an urgent problem to be solved.

Due to the relatively short age of landfills in some landfills and the peak of gas production, the garbage dumps are in an unstable state, which needs to be stabilized by aerobic stable degradation measures to create conditions for on-site closure.

The core of aerobic stabilization technology is to inject air into the landfill through certain equipment or facilities, turning the landfill into an aerobic bioreactor, and the degradable organic matter in the domestic waste is accelerated under aerobic conditions. , the final products of degradation are stable components, carbon dioxide and water. Due to the uneven distribution of waste in the landfill, the reaction process of aerobic degradation is complicated, and the main components of the discharged landfill gas are CO ₂ , excess O ₂ and a small amount of CH ₄ . At the same time, the moisture content of the garbage heap has a great influence on the aerobic degradation reaction, which easily leads to incomplete mineralization of the garbage heap and unsatisfactory mineralization effect during the aerobic stabilization process.

SUMMARY OF THE INVENTION

In the rapid stabilization system for a landfill provided by the embodiment of the present invention, a leachate horizontal guide and drainage system is arranged at the bottom of the garbage heap, and a gas extraction and injection system and a leachate irrigation and drainage system are inserted in the garbage heap. The liquid level guide and drainage system and the leachate irrigation and drainage system are connected to the leachate collection well,

The leachate horizontal drainage system is composed of high-density polyethylene pipes, and the high-density polyethylene pipes are provided with small holes with a diameter of 3-15mm.

One end of the gas extraction and injection pipeline in the gas extraction and injection system is vertically inserted into the garbage heap body, the other end is connected with the second control system, and the other end of the second control system is connected with the gas injection fan and the extraction fan;

One end of the leachate irrigation and drainage system is vertically inserted into the landfill waste heap, the other end is connected to the third control system, and the other end of the third control system is connected to the leachate drainage pump and the leachate lifting pump

The invention provides sufficient oxygen for the landfill garbage to ensure aerobic biochemical degradation; the leachate recharge makes the landfill a composite "purification reactor", and the nutrients in the leachate can be stored in the garbage heap. Fully circulate, effectively improve the growth and metabolism efficiency of microorganisms.

Further, the gas extraction and injection system includes three pipes with different lengths, and the ports of the pipes are respectively located at the upper, middle and lower parts of the garbage heap. The pipes can be used as a gas injection device or a gas extraction device.

Further, the gas injection fan injects air into the garbage dump body through the gas injection system through the gas injection pipeline, and there is a gas heat exchanger between the gas injection fan and the gas extraction and injection system.

Further, the air extraction fan draws the landfill gas out of the garbage dump body through the air extraction and injection system through the air extraction pipeline, and there is a liquid-water separator between the air extraction fan and the air extraction and injection system.

Further, the leachate irrigation and drainage system includes three pipes with different lengths, which are respectively located in the upper part, the middle part and the lower part of the garbage heap.

Further, it also includes a monitoring system, wherein a gas detector, a temperature sensor and a humidity sensor are arranged in the monitoring system, one end of the monitoring system is vertically inserted into the garbage dump of the landfill, and the other end is connected to the first control system,

The gas detector detects that the oxygen in the garbage heap is insufficient, and the first control system controls the second control system to start the gas injection device; the gas detector detects that the CO ₂ content in the garbage heap is too high, and the first control system controls the second control system The system starts the extraction device,

The humidity sensor detects that the moisture content of the garbage heap is less than 40%, and the first control system controls the third control system to start the leachate refilling device, so that the moisture content of the garbage heap reaches 40% to 60%; the humidity sensor monitors the garbage heap. If the moisture content of the garbage dump is greater than 60%, the first control system controls the third control system to activate the leachate guide and discharge device, so that the moisture content of the garbage dump body reaches 40% to 60%.

Further, an anti-seepage system is also included, the anti-seepage system is located at the bottom of the garbage heap body, and the leachate horizontal guide drainage system is located at the upper part of the anti-seepage system.

Additional aspects and advantages of embodiments of the present invention will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural diagram of a rapid stabilization system for a landfill according to an embodiment of the present invention.

1—Gas extraction and injection system; 2—Leachate irrigation and drainage system; 3—Monitoring system; 4—Leachate horizontal guide and drainage system; 5—Seepage prevention system; 6—Leachate collection well; 7—Second control System; 8—gas injection fan; 9—gas heat exchanger; 10—gas pipeline; 11—extraction pipeline; 12—steam-water separator; 13—extraction fan; 14—third control system; 15—leaching 16—Leachate drainage pump; 17—Leachate refilling pipeline; 18—Leachate lift pump; 19—First control system; 20—Trash body

Detailed ways

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity and not in itself indicative of a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to FIG. 1 , in the rapid stabilization system for a landfill provided by an embodiment of the present invention, a leachate horizontal guide and drainage system 4 is provided at the bottom of the garbage dump body 20 , and a gas extraction and injection system 1 and a The leachate irrigation and drainage system 2 , the leachate horizontal guide and drainage system 4 and the leachate irrigation and drainage system 2 are connected to the leachate collection well 6 . The leachate horizontal guide drainage system 4 is composed of high-density polyethylene pipes, and the high-density polyethylene pipes are provided with small holes with a diameter of 3-15 mm. One end of the gas extraction and injection pipeline in the gas extraction and injection system 1 is vertically inserted into the garbage dump body 20, the other end is connected with the second control system 7, and the other end of the second control system 7 is connected with the gas injection fan 8 and the extraction fan; One end of the leachate irrigation and drainage system 2 is vertically inserted into the landfill dump body 20, the other end is connected to the third control system 14, and the other end of the third control system 14 is connected to the leachate pump 16 and the leachate The lift pump 18 is connected.

The present invention provides sufficient oxygen for landfill garbage to ensure aerobic biochemical degradation; leachate recharge makes the landfill a composite "purification reactor", and the nutrients in the leachate can be stored in the garbage dump body 20 It can effectively improve the growth and metabolism efficiency of microorganisms.

Further, the gas injection system 1 includes three pipes with different lengths, and the ports of the pipes are located at the upper, middle and lower parts of the garbage dump body 20 respectively. The pipes can be used as a gas injection device or a gas extraction device. The length of the pipeline is determined according to the depth of the garbage heap 20 . In addition, the pipeline can be used as a gas injection device can also be used as a gas extraction device.

Further, the gas injection fan 8 injects air into the garbage dump body 20 through the gas extraction and injection system 1 through the gas transmission line 10 , and there is a gas heat exchanger 9 between the gas injection fan 8 and the gas extraction and injection system 1 . The extraction fan 13 draws the landfill gas out of the garbage dump 20 through the extraction and injection system 1 through the extraction pipeline 11 , and there is a steam-water separator 12 between the extraction fan 13 and the extraction and injection system 1 . In this way, the air passing through the gas heat exchanger is input into the garbage heap to accelerate the evaporation of water in the garbage heap.

Further, the leachate irrigation and drainage system 2 includes three pipes with different lengths, which are respectively located at the upper part, the middle part and the lower part of the garbage dump body 20 . The length of the pipeline is determined according to the depth of the garbage heap 20 . In addition, the pipeline can be used as a leachate drainage device as well as a leachate recharge device.

That is to say, the leachate drainage pump 16 draws out the leachate through the leachate diversion line 15 and discharges the leachate into the leachate collection well 6, and the leachate lift pump 18 passes through the leachate recharge line 17 to drain the leachate. The liquid is poured back into the garbage dump body 20 .

Further, it also includes a monitoring system 3, wherein a gas detector, a temperature sensor and a humidity sensor are arranged in the monitoring system 3, one end of the monitoring system 3 is vertically inserted into the landfill garbage heap 20, and the other end is connected to the first control system 19. . The gas detector detects that the oxygen in the garbage heap 20 is insufficient, and the first control system 19 controls the second control system 7 to start the gas injection device; the gas detector detects that the CO ₂ content in the garbage heap 20 is too high, and the first control system 19 controls the second control system 7 to activate the air extraction device. The humidity sensor detects that the moisture content of the garbage dump body 20 is less than 40%, and the first control system 19 controls the third control system to start the leachate refilling device, so that the moisture content of the garbage dump body 20 reaches 40% to 60%; the humidity sensor monitors When the moisture content of the garbage dump body 20 is greater than 60%, the first control system 19 controls the third control system to activate the leachate guide and discharge device, so that the moisture content of the garbage dump body 20 reaches 40% to 60%.

Further, an anti-seepage system 5 is also included, and the anti-seepage system 5 is located at the bottom of the garbage heap 20 , and the leachate horizontal guide and drainage system 4 is located at the upper part of the anti-seepage system 5 .

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (7)

1. The rapid stabilization system of the landfill is characterized in that, the bottom of the garbage heap is provided with a leachate horizontal guide and drainage system, and a gas pumping and injection system and a leachate irrigation and drainage system are inserted in the garbage heap. The liquid level guide and drainage system and the leachate irrigation and drainage system are connected to the leachate collection well, The leachate horizontal drainage system is composed of high-density polyethylene pipes, and the high-density polyethylene pipes are provided with small holes with a diameter of 3-15mm. One end of the gas extraction and injection pipeline in the gas extraction and injection system is vertically inserted into the garbage heap body, the other end is connected with the second control system, and the other end of the second control system is connected with the gas injection fan and the extraction fan; One end of the leachate irrigation and drainage system is vertically inserted into the landfill waste heap, the other end is connected to the third control system, and the other end of the third control system is connected to the leachate drainage pump and the leachate lifting pump. 2. The landfill rapid stabilization system according to claim 1, wherein the gas pumping and injection system comprises three pipes with different lengths, and the ports of the pipes are respectively located at the upper part, the middle part and the lower part of the garbage heap, and the pipes can be It can also be used as a gas injection device as a gas extraction device. 3. The landfill rapid stabilization system according to claim 1, characterized in that, the air injection fan injects air into the garbage dump body through the air injection pipeline through the air injection system, and the air injection fan and the air injection system are combined. There is a gas heat exchanger in between. 4. The landfill rapid stabilization system according to claim 1, characterized in that, the air extraction fan draws the landfill gas out of the garbage heap through the air extraction and injection system through the air extraction pipeline, and the air extraction fan and the air extraction and injection system There is a liquid-water separator between the systems. 5 . The rapid stabilization system for a landfill site according to claim 1 , wherein the leachate irrigation and drainage system comprises three pipes with different lengths, which are respectively located at the upper, middle and lower parts of the garbage heap. 6 . 6 . The landfill rapid stabilization system according to claim 1 , further comprising a monitoring system, wherein a gas detector, a temperature sensor and a humidity sensor are arranged in the monitoring system, and one end of the monitoring system is vertically inserted into the landfill. 7 . In the garbage dump body, the other end is connected with the first control system, The gas detector detects that the oxygen in the garbage heap is insufficient, and the first control system controls the second control system to start the gas injection device; the gas detector detects that the CO2 content in the garbage heap is too high, and the first control system controls the second control system Start the extraction device, The humidity sensor detects that the moisture content of the garbage heap is less than 40%, and the first control system controls the third control system to start the leachate refilling device, so that the moisture content of the garbage heap reaches 40% to 60%; the humidity sensor monitors the garbage heap. If the moisture content of the garbage dump is greater than 60%, the first control system controls the third control system to activate the leachate guide and discharge device, so that the moisture content of the garbage dump body reaches 40% to 60%. 7 . The rapid stabilization system for a landfill according to claim 1 , further comprising an anti-seepage system, the anti-seepage system is located at the bottom of the garbage dump body, and the leachate horizontal guide drainage system is located in the anti-seepage system. 8 . upper part of the system.

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