CN114393002A - Gas-liquid combined system for rapidly reducing garbage in garbage landfill - Google Patents
Gas-liquid combined system for rapidly reducing garbage in garbage landfill Download PDFInfo
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- CN114393002A CN114393002A CN202111640913.6A CN202111640913A CN114393002A CN 114393002 A CN114393002 A CN 114393002A CN 202111640913 A CN202111640913 A CN 202111640913A CN 114393002 A CN114393002 A CN 114393002A
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- 239000007788 liquid Substances 0.000 title claims abstract description 63
- 239000007789 gas Substances 0.000 claims abstract description 43
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 238000000605 extraction Methods 0.000 claims abstract description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 229920001903 high density polyethylene Polymers 0.000 claims description 31
- 239000004700 high-density polyethylene Substances 0.000 claims description 31
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- 239000001569 carbon dioxide Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000005273 aeration Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002640 oxygen therapy Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a gas-liquid combined system for rapidly reducing garbage in a refuse landfill.A percolate guide and drainage facility is arranged at the slope foot around a refuse dump, and a percolate collecting well is arranged at the lowest position of the slope foot of the refuse dump; the percolate collecting well is connected to a regulating tank through a pipeline; a gas-liquid combined control system and a monitoring system are arranged in the garbage pile body, and a temporary covering system is arranged at the upper part of the garbage pile body; the gas-liquid combined control system comprises a gas injection system, a gas extraction system and a leachate recirculation system; the monitoring system monitors the interior of the garbage pile body and monitors the temperature, the humidity and the oxygen content of the garbage pile body. Oxygen therapy aeration and leachate recharge are carried out on the garbage heap body, and garbage interpretation of the refuse landfill site is accelerated. Meanwhile, the gas injection system, the gas extraction system and the leachate recirculation system are combined, so that the problems of more pipelines, complex construction process, high debugging difficulty, high operation and maintenance difficulty, high manufacturing cost, unsatisfactory aerobic quick reduction result and the like are solved.
Description
Technical Field
The invention belongs to the technical field of pollution control of refuse landfills, and particularly relates to a gas-liquid combined system for rapidly reducing refuse in a refuse landfill.
Background
Aiming at the refuse landfill with short refuse landfill age, the refuse is not completely degraded and stabilized, the content of organic matters in the refuse is high, the content of methane in landfill gas is high, and the refuse is still in the peak period of biological reaction. Meanwhile, the degradation speed of the garbage under natural conditions after being sealed is very slow, and the reutilization of landfill and regional land resources is seriously influenced.
Aiming at the situation, the safe and stable treatment work of the refuse landfill is ensured, and the key disposal technology adopted by the refuse landfill is an oxygen transportation aeration technology, so that the refuse landfill becomes an aerobic bioreactor to quickly degrade the refuse of the refuse landfill and shorten the stabilization time of the refuse landfill. However, the existing aerobic stabilization technology is realized through a gas injection well, an extraction well and a recharge well, and has the problems of more pipelines, complex construction process, high debugging difficulty, high operation and maintenance difficulty, unsatisfactory aerobic quick reduction result and the like.
Disclosure of Invention
The gas-liquid combined system for rapidly reducing the garbage in the refuse landfill provided by the invention solves the problems by uniformly combining the gas injection well, the gas extraction well and the recharge well into the gas-liquid combined system.
The invention discloses a rapid garbage reduction gas-liquid combined system for a refuse landfill, which comprises a percolate guide and discharge facility, a percolate collecting well, a regulating tank, a gas-liquid combined well and a gas-liquid combined control system, wherein the percolate collecting well is connected with the regulating tank through a pipeline; the percolate guide and discharge facility is arranged at the slope toe at the periphery of the garbage pile body and is used for collecting percolate of the garbage pile body; the percolate collecting well is arranged at the lowest part of the slope toe of the garbage heap body, the percolate guide and drainage facility is connected with the bottom of the percolate collecting well, and percolate collected by the percolate guide and drainage facility flows into the percolate collecting well; the regulating tank is arranged beside the garbage pile body, and a pumping and discharging pump is arranged in the percolate collecting well and is used for pumping and discharging percolate in the percolate collecting well into the regulating tank; the gas-liquid combined control system is used for gas injection, gas extraction and leachate recirculation of the gas-liquid combined well.
Further, the gas-liquid combined control system comprises a first controller, a gas injection fan, an air exhaust fan, a leachate recirculation pump and a change-over valve. The gas-liquid combined well is respectively connected with a gas injection fan, an air extraction fan and a percolate recharging pump through a change-over valve; the first controller is connected with the conversion valve and used for controlling the switch of the conversion valve, and the gas injection fan, the air exhaust fan, the percolate recharging pump and the gas-liquid combined well are controlled to be communicated by controlling the conversion valve; the leachate recirculation pump is arranged in the regulating tank.
Further, a gas filter is connected between the gas injection fan and the conversion valve.
Further, a gas-water separator and a gas-heat converter are connected between the air exhaust fan and the conversion valve.
Furthermore, a water quality filter is connected between the leachate recirculation pump and the change-over valve.
Furthermore, one end of the gas-liquid combined well is vertically inserted into the garbage heap body, and the distance from the bottom of the gas-liquid combined well to the bottom of the landfill site is not less than 2 m.
Furthermore, six gas-liquid combined wells are arranged in a regular hexagon.
Further, the system also comprises an environment detection well and an environment monitoring system; the environment monitoring system comprises a second controller, a humidity sensor, a temperature sensor, an oxygen sensor and a carbon dioxide sensor; the second controller is respectively connected with the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor; the environment detection well is used for receiving detection data of each sensor, and the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor are all arranged in the environment detection well. The second controller is connected with the first controller and is used for sending the environment detection data to the first controller.
Further, gas-liquid allies oneself with uses the well and includes that the HDPE is responsible for and HDPE branch pipe, and the HDPE branch pipe sets up on the HDPE is responsible for, is responsible for the intercommunication with the HDPE.
Furthermore, the number of the HDPE branch pipes is four, and the HDPE branch pipes are connected with the HDPE main pipe through special-shaped five-way pipes.
The invention has the beneficial effects that:
1. the landfill is changed into an aerobic bioreactor by controlling the temperature, the humidity and the oxygen content in the garbage pile, the physical and chemical conditions in the landfill are changed, an environment which meets the growth of microorganisms is established, the decomposition of biodegradable organic matters in the garbage is accelerated by utilizing the action of the microorganisms, and the stabilization time of the landfill is shortened.
2. Through uniformly incorporating gas injection, air exhaust and recharge into a gas-liquid combined system, the problems of more pipelines, complex construction process, high debugging difficulty, high operation and maintenance difficulty, high manufacturing cost, unsatisfactory achievement of aerobic quick decrement and the like in aerobic quick decrement are solved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a drawing of the gas extraction and injection arrangement of the present invention.
FIG. 3 is a top view of a gas-liquid combination well.
Wherein: 1-garbage dump; 2-leachate guide and drainage facilities; 3-a regulating reservoir; 4-an environment detection well; 5-leachate collecting well 5; 6-gas-liquid combined well; 7-HDPE main pipe 7; 8-HDPE branch pipes; 9-special-shaped five-way; 10-switching valve 10; 11-an air exhaust fan; 12-a pump-drain pump; 13-leachate recirculation pump; 14-a gas injection fan; 15-gas filter; 16-water quality filter; 17-a steam-water separator; 18-gas heat converter.
Detailed Description
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
As shown in fig. 1, a rapid decrement gas-liquid combined system for garbage in a landfill site comprises a leachate guiding and discharging facility 2, a leachate collecting well 5, a regulating tank 3, a gas-liquid combined well 6, a gas-liquid combined control system, an environment detection well 4 and an environment monitoring system.
The gas-liquid combined control system comprises a first controller, a gas injection fan 14, an air extraction fan 11, a percolate recharging pump 13 and a change-over valve 10; the gas-liquid combined well 6 is respectively connected with a gas injection fan 14, an air extraction fan 11 and a percolate recirculation pump 13 through a conversion valve 10; the first controller is connected with the conversion valve 10 to realize the connection switching between the gas injection fan 14, the air extraction fan 11 and the leachate recirculation pump 13 and the gas-liquid combined well 6.
A gas filter 15 is connected between the gas injection fan 14 and the conversion valve 10; the dust filter is used for filtering dust in air, avoids influencing the normal operation of subsequent equipment, and shortens the service life of the equipment.
A steam-water separator 17 and a gas-heat converter 18 are also connected between the air exhaust fan 11 and the conversion valve 10; the landfill body has high internal temperature and high water content, and the steam-water separator is used for separating landfill gas and water vapor and drying the landfill gas; the gas-heat converter is used for reducing the temperature of the landfill gas, so that the influence of the landfill gas with higher temperature and higher water content on the air exhaust fan is avoided, and the service life of the air exhaust fan is shortened.
A water quality filter 16 is also connected between the percolate recirculation pump 13 and the change-over valve 10.
One end of the gas-liquid combined well 6 is vertically inserted into the garbage pile body 1, and the distance from the bottom of the gas-liquid combined well 6 to the bottom of a landfill site is not less than 2 m; six gas-liquid combined wells 6 are arranged in a regular hexagon, and each gas-liquid combined well 6 is connected with a gas injection fan 14, an air extraction fan 11 and a percolate recirculation pump 13 through a conversion valve 10.
The leachate guiding and draining facility 2 is arranged at the peripheral toe of the garbage stack body 1, the leachate collecting well 5 is arranged at the lowest part of the toe of the garbage stack body 1, the leachate guiding and draining facility 2 is connected with the bottom of the leachate collecting well 5, leachate collected by the leachate guiding and draining facility 2 flows into the leachate collecting well 5, the adjusting tank 3 is arranged beside the garbage stack body 1, a pumping and draining pump 12 is arranged in the leachate collecting well 5 and is used for pumping and draining the leachate in the leachate collecting well 5 into the adjusting tank 3 and carrying out balanced water quality adjustment in the adjusting tank 3, and a leachate recirculation pump 13 is arranged in the adjusting tank 3 and is used for recirculating the leachate into the gas-liquid combined well 6 when the temperature of the garbage stack body 1 is lower.
The percolate guide and drainage facility 2 is a horizontal guide and drainage blind ditch which is composed of high-density polyethylene pipes (HDPE pipes), small holes with the diameter of 5-10mm are uniformly formed in the HDPE pipes, and percolate in the garbage pile body 1 enters the percolate guide and drainage facility 2 through the small holes.
As shown in fig. 3, the gas-liquid combination well 6 comprises an HDPE main pipe 7, a special-shaped five-way pipe 9 and four HDPE branch pipes, wherein the HDPE main pipe 7 and the four HDPE branch pipes are respectively provided with a small hole with the diameter of 20-30mm, and the four HDPE branch pipes are connected with the HDPE main pipe 7 through the special-shaped five-way pipe 9. The included angle between the HDPE branch pipe 8 and the HDPE pipe is 45-60 degrees.
The purpose of setting up 4 HDPE branch pipes 8 is in order to enlarge the area of contact of gas-liquid combination well 6 and rubbish heap body 1, enlarges the area of influence of gas-liquid combination well 6 as far as possible, reduces the gas-liquid combination well's of landfill the quantity that sets up, and the quantity of HDPE branch pipe 8 also can set up more.
The monitoring system comprises a second controller, a humidity sensor, a temperature sensor, an oxygen sensor and a carbon dioxide sensor, wherein the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor are all arranged in the environment detection well 4. The second controller is respectively connected with the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor and used for receiving detection data.
The second controller is connected with the first controller, transmits the monitoring data of all sensors to the first controller, and the first controller compares the received monitoring data with the set monitoring data range, so that the temperature of the garbage stack body 1 is controlled to be below 60 ℃ through the control of the first controller on the gas injection fan 14, the gas extraction fan 11 and the leachate recirculation pump 13, the water content of the garbage stack body 1 is controlled to be within the range of 40-60%, and the oxygen content of the garbage stack body 1 is more than 30%.
When the first controller obtains that the humidity data of the garbage heap 1 fed back by the second controller is less than 40%, the first controller controls the leachate recirculation pump 13 to be started, leachate is replenished into each gas-liquid combined well 6, so that the purpose of replenishing moisture to the garbage heap 1 is achieved, and when a humidity monitoring system in the garbage heap 1 monitors that the humidity of the garbage heap 1 reaches 60%, leachate recirculation is stopped.
And when the first controller obtains that the oxygen content of the garbage pile body 1 fed back by the second controller is less than 30%, controlling the gas injection fan 14 to be started.
When the first controller obtains that the carbon dioxide content of the garbage pile body 1 fed back by the second controller is high, the second controller feeds back data to the first controller, and the air exhaust fan 11 is controlled to be started.
The temperature is influenced by air extraction, air injection and leachate recirculation, and the temperature of the landfill body is reduced by the air extraction, the air extraction and the leachate recirculation; if the operation is stopped for a period of time after gas injection and leachate recharging of the gas-liquid combined well, the temperature of the garbage pile is increased due to aerobic degradation of the garbage pile; when the temperature is higher than or equal to 60 ℃, air extraction and/or air injection are started, as shown in fig. 2, for six gas-liquid combination wells 6, when the adjacent gas-liquid combination wells 6 respectively process the air injection and air extraction using states, the temperature of the garbage stack body can be reduced, the gas can be uniformly distributed inside the landfill, the gas such as carbon dioxide (CO 2), methane (CH 4) and the like inside the landfill can be comprehensively and effectively extracted out of the garbage stack body 1, and the aerobic environment of the garbage stack body 1 inside the landfill is prevented from being damaged.
Various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Before the rapid reduction construction of the garbage is carried out on the garbage pile body 1 of the garbage landfill, the content of organic matters of the garbage landfill needs to be investigated, the proportion of the oxygen content actually participating in the aerobic reaction and the actual oxygen supply amount needs to be fully considered, and the oxygen supply parameters are reasonably planned according to the reaction process.
Claims (10)
1. A rapid garbage decrement gas-liquid combined system for a refuse landfill is characterized by comprising a percolate guide and discharge facility, a percolate collecting well, a regulating tank, a gas-liquid combined well and a gas-liquid combined control system;
the percolate guide and discharge facility is arranged at the slope toe at the periphery of the garbage pile body and is used for collecting percolate of the garbage pile body;
the percolate collecting well is arranged at the lowest part of the slope toe of the garbage heap body, the percolate guide and drainage facility is connected with the bottom of the percolate collecting well, and percolate collected by the percolate guide and drainage facility flows into the percolate collecting well;
the regulating tank is arranged beside the garbage pile body, and a pumping and discharging pump is arranged in the percolate collecting well and is used for pumping and discharging percolate in the percolate collecting well into the regulating tank;
the gas-liquid combined control system is used for gas injection, gas extraction and leachate recirculation of the gas-liquid combined well.
2. The rapid refuse decrement gas-liquid combination system for the refuse landfill of claim 1, wherein the gas-liquid combination control system comprises a first controller, a gas injection fan, a gas exhaust fan, a percolate recirculation pump and a change-over valve;
the first controller is connected with the conversion valve and used for controlling the switch of the conversion valve;
the gas-liquid combined well is respectively connected with a gas injection fan, an air extraction fan and a percolate recharging pump through a change-over valve;
the leachate recirculation pump is arranged in the regulating tank.
3. The landfill garbage rapid decrement gas-liquid combination system as claimed in claim 2, wherein a gas filter is further connected between the gas injection blower and the conversion valve.
4. The rapid refuse decrement gas-liquid combination system for refuse landfill of claim 2, wherein a gas-water separator and a gas-heat converter are further connected between the suction fan and the conversion valve.
5. The rapid garbage decrement gas-liquid combination system for the refuse landfill as claimed in claim 2, wherein a water filter is further connected between the leachate recirculation pump and the change-over valve.
6. The landfill site garbage rapid reduction gas-liquid combination system according to claim 1, wherein the gas-liquid combination wells have six gas-liquid combination wells in a regular hexagonal arrangement.
7. The rapid refuse decrement gas-liquid combination system for refuse landfill of claim 1, wherein one end of the gas-liquid combination well is vertically inserted into the refuse dump, and the bottom of the gas-liquid combination well is not less than 2m from the bottom of the refuse landfill.
8. The landfill garbage rapid reduction gas-liquid combined system according to claim 2, further comprising an environment detection well and an environment monitoring system;
the environment monitoring system comprises a second controller, a humidity sensor, a temperature sensor, an oxygen sensor and a carbon dioxide sensor; the second controller is respectively connected with the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor;
the humidity sensor, the temperature sensor, the oxygen sensor and the carbon dioxide sensor are all arranged in the environment detection well; the second controller is connected with the first controller and is used for sending the environment detection data to the first controller.
9. The rapid garbage abatement gas-liquid combination system of claim 1, wherein the gas-liquid combination well comprises a main HDPE pipe and a branch HDPE pipe, and the branch HDPE pipe is disposed on the main HDPE pipe and is communicated with the main HDPE pipe.
10. The rapid garbage decrement gas-liquid combination system for the refuse landfill as claimed in claim 9, wherein the number of the HDPE branch pipes is four, and the HDPE branch pipes are connected with the HDPE main pipe through special-shaped five-way pipes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640913.6A CN114393002B (en) | 2021-12-30 | 2021-12-30 | Gas-liquid combined system for rapidly reducing garbage in garbage landfill |
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| CN202111640913.6A CN114393002B (en) | 2021-12-30 | 2021-12-30 | Gas-liquid combined system for rapidly reducing garbage in garbage landfill |
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| CN114393002A true CN114393002A (en) | 2022-04-26 |
| CN114393002B CN114393002B (en) | 2022-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114904876A (en) * | 2022-05-31 | 2022-08-16 | 北京国环清华环境工程设计研究院有限公司 | Drainage guide device, rigid landfill pool and highly-intensive rigid landfill unit process |
| CN116618421A (en) * | 2023-05-26 | 2023-08-22 | 瑞邦环境治理(广东)有限公司 | In-situ stabilization control system and method for stock garbage |
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| CN114393002B (en) | 2022-11-22 |
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