CN111185456A - Stabilization landfill method for fly ash chelate - Google Patents
Stabilization landfill method for fly ash chelate Download PDFInfo
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- CN111185456A CN111185456A CN202010083534.0A CN202010083534A CN111185456A CN 111185456 A CN111185456 A CN 111185456A CN 202010083534 A CN202010083534 A CN 202010083534A CN 111185456 A CN111185456 A CN 111185456A
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- landfill
- fly ash
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- road
- covering
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- 239000010881 fly ash Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000013522 chelant Substances 0.000 title claims abstract description 16
- 230000006641 stabilisation Effects 0.000 title claims abstract description 11
- 238000011105 stabilization Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 229920006262 high density polyethylene film Polymers 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000003712 anti-aging effect Effects 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000010920 waste tyre Substances 0.000 claims description 3
- 241000288140 Gruiformes Species 0.000 description 9
- 239000010813 municipal solid waste Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 2
- 241000124872 Grus grus Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a fly ash chelate stabilization landfill method, which comprises the following steps: step one, arranging a bank in a landfill reservoir area to divide the bank into a plurality of operation areas and operation units; step two, paving a temporary approach road and an operation platform, planning a route of the temporary approach road according to the position of an operation area, and then paving the temporary approach road and hoisting the platform; and step three, landfill and covering are carried out on the bagged fly ash, a crane is adopted to hoist the bagged fly ash, an excavator is used for paving and compacting the bagged fly ash to be buried to an operation area, and a covering mode combining daily coverage and middle coverage is adopted on the bagged fly ash which is buried, wherein the middle coverage refers to a landfill operation area which is completed in stages. The method is a landfill method for stabilized fly ash, which can not only ensure the stability of a fly ash pile body, but also make 100% use of a fly ash landfill area.
Description
Technical Field
The invention relates to a stabilization landfill method for a fly ash chelate, and particularly relates to the technical field of garbage treatment.
Background
With the improvement of physical life, the daily yield of domestic garbage in a common city can reach hundreds of tons, and the daily yield of domestic garbage in a large city can reach thousands of tons. Urban waste incineration is more and more common, domestic waste is recycled, waste incineration is used for power generation, and a large amount of fly ash is generated in the incineration process. The fly ash is chelated into fly ash chelates and finally buried in a fly ash landfill.
The existing fly ash treatment mode is landfill according to the traditional domestic garbage landfill operation mode. The method specifically comprises the following steps: the fly ash chelate is hoisted and unloaded to a landfill area bag by a crane, and if uneven places exist in the hoisting and unloading process, the fly ash chelate is filled with sand bags. A larger gap exists between the ash bags during operation, and although the plane is padded by the sand bags, the storage capacity utilization rate is lower.
Disclosure of Invention
The invention aims to provide a fly ash chelate stabilization landfill method to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a fly ash chelate stabilization landfill method comprises the following steps: step one, arranging a bank in a landfill reservoir area to divide the bank into a plurality of operation areas and operation units; the landfill reservoir area is divided by taking the operation area and the operation unit as a unit, so that drainage and diversion of rainwater in the reservoir area can be effectively controlled;
step two, paving a temporary approach road and an operation platform, planning a route of the temporary approach road according to the position of an operation area, and then paving the temporary approach road and hoisting the platform;
in the landfill stage, a temporary operation road is built on the surface of the pile body to meet the requirement of flying ash ton bag lifting pile, the operation road is connected with the approach road and the landfill operation unit and is continuously extended or heightened along with the landfill operation;
according to a landfill plan, at the initial stage of landfill, the rotary platform of an entrance road is filled with piles, a layer of ton bags are quickly paved, and then a steel plate road foundation box is erected to carry out landfill lifting towards the northeast direction;
the width of the temporary operation road needs to be ensured to be 6m, the temporary operation road is far away from the seepage-proof side slope and the platform thereof by more than 10 m, the edge of the temporary operation road needs to have enough safety distance from the fly ash filling edge, and the slope ratio of the outer side slope is not steeper than 1: 2, covering a soil layer with the thickness of 10-20cm on the filled area before covering with the geomembrane, and laying steel plates only by adopting a liner made of materials such as geotextile or canvas and the like above the geomembrane after covering with the geomembrane so as to avoid the damage of the geomembrane caused by the steel plates;
considering the load of crane and transport vehicle, steel plate road base box is used to construct temporary road and unload
A platform;
and step three, landfill and covering are carried out on the bagged fly ash, a crane is adopted to hoist the bagged fly ash, an excavator is used for paving and compacting the bagged fly ash to be buried to an operation area, and a covering mode combining daily coverage and middle coverage is adopted on the bagged fly ash which is buried, wherein the middle coverage refers to a landfill operation area which is completed in stages.
Preferably, the size of the steel plate roadbed box in the second step can be set to be 6m × 1.5m or 8m × 1.5 m.
Preferably, the filling work amount which can be satisfied by the work area is 3 to 12 times of the filling work amount which can be satisfied by the work unit.
Preferably, in the third step, the tonnage of the crane can be selected from 35t, 50t or 80t, 2 or 4 bags are hung in each time, and the maximum tonnage is not more than 6 bags.
Preferably, the stacking operation of each layer of fly ash in the third step is performed in the order from bottom to top. Preferably, the inclination of the slope of the daily landfill completion surface in the third step is not more than 1
(V): 5 (H), the slope of the front side slope consisting of compacted fly ash must not exceed 1 (V): 3 (H), the slope of the side slope is not more than 1 (V): 2 (H), the vertical working surface and the non-compacted working surface do not allow the fly ash to be lifted upwards, and all the inclined surfaces of the pile are maintained in a stable condition.
Preferably, the specific steps of the third step, the middle day coverage and the middle coverage are as follows: covering the fly ash stack body by adopting a 1.0mm HDPE film in an overlapping way, and completely covering the surface of a landfill area, wherein a 0.3mm impermeable film is adopted for daily covering of a daily operation area, a part of the covering film is uncovered for landfill operation during operation, and the film is covered immediately after the daily landfill is finished;
for the HDPE film adopted to cover the middle area, the HDPE film is laid along the slope and welded by a special welding machine, waste tires are matched with anti-aging sand bags to carry out ballasting after the welding is finished, and 8mm nylon ropes are adopted to connect and fix the tires so as to prevent the tires from being blown away by wind.
Compared with the prior art, the invention has the beneficial effects that: the method is a landfill method for stabilized fly ash, which can not only ensure the stability of a fly ash pile body, but also make 100% use of a fly ash landfill area.
Drawings
FIG. 1 is a schematic diagram illustrating a separation state of a landfill region 1 in step one according to the present invention;
FIG. 2 is a schematic structural diagram illustrating planning of a temporary approach road according to the location of a work area in step two according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the filling and covering status of bagged fly ash in step three according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
the invention provides a technical scheme that: a fly ash chelate stabilization landfill method comprises the following steps: the method comprises the following steps: a bank is arranged in the landfill reservoir area 1 and is divided into a plurality of operation areas and operation units; the landfill reservoir area 1 is divided by taking the operation area and the operation unit as a unit, so that drainage and diversion of rainwater in the reservoir area can be effectively controlled. Referring to fig. 1, the partition division has the function of dividing the landfill area 1 into a working area and an area to be worked, the unit division embankment has the function of subdividing the working area into a plurality of working units, and the landfill work amount which can be met by the working area is 3-12 times of that which can be met by the working units. For example, one work area can satisfy the requirement of 1-3 months of landfill operation amount, one work unit can satisfy the requirement of 3-7 days of landfill operation amount, the height of the partition bank 2 is set to be 1m-2m, and the height of the partition bank 3 is set to be 0.5m-1 m.
Step two, paving a temporary approach road and an operation platform: referring to fig. 2, a route of the temporary approach road 2 is planned according to the position of the working area, and then the temporary approach road and the hoisting platform are laid.
In the landfill stage, a temporary operation road is built on the surface of the pile body to meet the requirement of hoisting and stacking the fly ash ton bags. The operation road is connected with the approach road and the landfill operation unit and is continuously lengthened or heightened along with the landfill operation.
According to a landfill plan, at the initial stage of landfill, the rotary platform of the temporary working road starts to perform landfill, a layer of ton bags is quickly paved, and then a steel plate road foundation box is erected to perform landfill lifting towards the northeast direction.
The width of the temporary operation road needs to be ensured to be 6m, the temporary operation road is far away from the seepage-proof side slope and the platform thereof by more than 10 m, the edge of the temporary operation road needs to have enough safety distance from the fly ash filling edge, and the slope ratio of the outer side slope is not steeper than 1: 2 to ensure the stability of the stack.
Considering the load when the crane and the transport vehicle travel, a temporary road and a discharging platform are constructed by using steel plate roadbed boxes (the size of each steel plate roadbed box can be set to be 6m multiplied by 1.5m or 8m multiplied by 1.5 m).
In order to ensure the stability of the temporary road, in the filled area, a soil layer with the thickness of 10-20cm needs to be covered before the film covering is carried out, after the film covering is carried out, a steel plate can be laid only by adopting a liner made of materials such as geotextile or canvas and the like above the geomembrane, and the damage of the steel plate to the geomembrane is avoided.
The edge of the temporary road has enough safety distance from the fly ash filling edge, and the slope ratio of the outer side slope is not steeper than 1: 2 to ensure the stability of the stack.
Step three, landfill and covering are carried out on bagged fly ash: a crane is adopted to hoist the bagged fly ash, and the tonnage of the common crane can be 35t, 50t or 80 t. The effective operation radius of a 35t crane is about 15m, the effective operation radius of a 50t crane is about 25m, the effective operation radius of an 80t crane is about 40m, in order to fully consider the factors of hoisting safety, efficiency, cost and the like, 2 or 4 bags are hung in each time, and the maximum number is not more than 6 bags (1 t-1.4 t/bag); and then, paving and compacting the fly ash to a working area by using a digging machine, and covering the bagged fly ash which is filled in the working area by combining daily coverage and middle coverage. The intermediate coverage refers to a landfill area that is completed in stages. The daily coverage and the intermediate coverage steps are as follows: in order to reduce the generation amount of percolate in a fly ash landfill and prevent rainwater from directly entering a fly ash pile body, 1.0mm HDPE film is adopted to overlap and cover the fly ash pile body to completely cover the surface of a landfill area, wherein 0.3mm impermeable film is adopted to cover a daily operation area, part of the covering film is uncovered to perform landfill operation during operation, and the film is covered immediately after the daily landfill operation is completed. The stacking operation of each layer of fly ash is carried out from bottom to top, the operation area of each unit is 200 square meters, the height of the fly ash of each unit is preferably 3m, and the maximum height is not more than 5 m. Filling the bottom layer, stacking from the second layer, and breaking bag and compacting with excavator, wherein the thickness of the spread fly ash is not more than 1m, the excavator must level the fly ash within the operation range, and the distance from the operation boundary must be more than 2 m.
For the HDPE film adopted to cover the middle area, the HDPE film is laid along the slope and welded by a special welding machine, waste tires are matched with anti-aging sand bags to carry out ballasting after the welding is finished, and 8mm nylon ropes are adopted to connect and fix the tires so as to prevent the tires from being blown away by wind.
Inclination of inclined surface of daily landfill completion surface is not more than 1 (V): 5 (H), the slope of the front side slope consisting of compacted fly ash must not exceed 1 (V): 3 (H), the slope of the side slope is not more than 1 (V): 2 (H). Both the vertical and non-compacted surfaces do not allow the fly ash to be lifted upwards and all the stack slopes will remain in a stable condition, as shown in figure 3.
Different landfill methods and rain-proof, dust-proof and wind-proof measures are provided for different weathers and different seasons in the operation process: (1) pushing the landfill operation surface into an inclined surface of 1-2% to facilitate drainage; (2) during landfill operation, the fly ash solidified bodies are centralized in one area for landfill, a certain gradient is kept on the landfill surface, drainage is enhanced in rainy season, rainwater is prevented from entering the fly ash pile body, and the production amount of percolate is increased; (3) and (4) forbidding operation in heavy rain weather, and implementing landfill after the weather is changed well.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A fly ash chelate stabilization landfill method is characterized in that: the landfill method comprises the following steps: step one, arranging a bank in a landfill reservoir area to divide the bank into a plurality of operation areas and operation units; the landfill reservoir area is divided by taking the operation area and the operation unit as a unit, so that drainage and diversion of rainwater in the reservoir area can be effectively controlled;
step two, paving a temporary approach road and an operation platform, planning a route of the temporary approach road according to the position of an operation area, and then paving the temporary approach road and hoisting the platform;
in the landfill stage, a temporary operation road is built on the surface of the pile body to meet the requirement of flying ash ton bag lifting pile, the operation road is connected with the approach road and the landfill operation unit and is continuously extended or heightened along with the landfill operation;
according to a landfill plan, at the initial stage of landfill, the rotary platform of an entrance road is filled with piles, a layer of ton bags are quickly paved, and then a steel plate road foundation box is erected to carry out landfill lifting towards the northeast direction;
the width of the temporary operation road needs to be ensured to be 6m, the temporary operation road is far away from the seepage-proof side slope and the platform thereof by more than 10 m, the edge of the temporary operation road needs to have enough safety distance from the fly ash filling edge, and the slope ratio of the outer side slope is not steeper than 1: 2, covering a soil layer with the thickness of 10-20cm on the filled area before covering with the geomembrane, and laying steel plates only by adopting a liner made of materials such as geotextile or canvas and the like above the geomembrane after covering with the geomembrane so as to avoid the damage of the geomembrane caused by the steel plates;
considering the load of crane and transport vehicle, steel plate road base box is used to construct temporary road and unload
A platform;
and step three, landfill and covering are carried out on the bagged fly ash, a crane is adopted to hoist the bagged fly ash, an excavator is used for paving and compacting the bagged fly ash to be buried to an operation area, and a covering mode combining daily coverage and middle coverage is adopted on the bagged fly ash which is buried, wherein the middle coverage refers to a landfill operation area which is completed in stages.
2. A fly ash chelate stabilization landfill method according to claim 1, characterized in that: the size of the steel plate roadbed box in the second step can be set to be 6m multiplied by 1.5m or 8m multiplied by 1.5 m.
3. A fly ash chelate stabilization landfill method according to claim 1, characterized in that: the landfill workload which can be met by the operation area is 3-12 times of that which can be met by the operation unit.
4. A fly ash chelate stabilization landfill method according to claim 1, characterized in that: the tonnage of the crane in the third step can be selected from 35t, 50t or 80t, 2 or 4 bags are hung in each time, and the maximum tonnage does not exceed 6 bags.
5. The method of claim 1, wherein the fly ash chelate is stabilized in landfill
In the following steps: and the stacking operation of each layer of fly ash in the third step is carried out in the sequence from bottom to top.
6. The method of claim 1, wherein the fly ash chelate is stabilized in landfill
In the following steps: the slope of the inclined plane of the daily landfill completion surface in the third step is not more than 1 (V): 5 (H), the slope of the front side slope consisting of compacted fly ash must not exceed 1 (V): 3 (H), the slope of the side slope is not more than 1 (V): 2 (H), the vertical working surface and the non-compacted working surface do not allow the fly ash to be lifted upwards, and all the inclined surfaces of the pile are maintained in a stable condition.
7. The method of claim 1, wherein the fly ash chelate is stabilized in landfill
In the following steps: the method comprises the following specific steps of day coverage and middle coverage in the third step: covering the fly ash stack body by adopting a 1.0mm HDPE film in an overlapping way, and completely covering the surface of a landfill area, wherein a 0.3mm impermeable film is adopted for daily covering of a daily operation area, a part of the covering film is uncovered for landfill operation during operation, and the film is covered immediately after the daily landfill is finished;
for the HDPE film adopted to cover the middle area, the HDPE film is laid along the slope and welded by a special welding machine, waste tires are matched with anti-aging sand bags to carry out ballasting after the welding is finished, and 8mm nylon ropes are adopted to connect and fix the tires so as to prevent the tires from being blown away by wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010083534.0A CN111185456A (en) | 2020-02-09 | 2020-02-09 | Stabilization landfill method for fly ash chelate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010083534.0A CN111185456A (en) | 2020-02-09 | 2020-02-09 | Stabilization landfill method for fly ash chelate |
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| CN111185456A true CN111185456A (en) | 2020-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260282A (en) * | 2021-12-03 | 2022-04-01 | 灌南新苏国丰新能源有限公司 | Fly ash landfill method for waste incineration power plant |
| CN116140322A (en) * | 2022-09-22 | 2023-05-23 | 江苏生久环境科技有限公司 | Landfill fly ash landfill method |
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| JP2000005721A (en) * | 1998-06-19 | 2000-01-11 | Mutsumi:Kk | Treatment of waste and device therefor |
| CN103357643A (en) * | 2013-07-12 | 2013-10-23 | 上海野马环保设备工程有限公司 | Household waste landfill pollution control technology |
| CN107876547A (en) * | 2017-11-17 | 2018-04-06 | 中国科学院城市环境研究所 | One kind landfill body and preparation method thereof and equipment |
| CN109590305A (en) * | 2018-05-31 | 2019-04-09 | 史东晓 | A kind of burying method stabilizing flying dust |
| CN209177871U (en) * | 2018-10-29 | 2019-07-30 | 上海二十冶建设有限公司 | Platform structure for memorial archway continuously hoisting |
| CN110420961A (en) * | 2019-05-14 | 2019-11-08 | 广州环投环境服务有限公司 | A kind of flying dust landfill process |
-
2020
- 2020-02-09 CN CN202010083534.0A patent/CN111185456A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000005721A (en) * | 1998-06-19 | 2000-01-11 | Mutsumi:Kk | Treatment of waste and device therefor |
| CN103357643A (en) * | 2013-07-12 | 2013-10-23 | 上海野马环保设备工程有限公司 | Household waste landfill pollution control technology |
| CN107876547A (en) * | 2017-11-17 | 2018-04-06 | 中国科学院城市环境研究所 | One kind landfill body and preparation method thereof and equipment |
| CN109590305A (en) * | 2018-05-31 | 2019-04-09 | 史东晓 | A kind of burying method stabilizing flying dust |
| CN209177871U (en) * | 2018-10-29 | 2019-07-30 | 上海二十冶建设有限公司 | Platform structure for memorial archway continuously hoisting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260282A (en) * | 2021-12-03 | 2022-04-01 | 灌南新苏国丰新能源有限公司 | Fly ash landfill method for waste incineration power plant |
| CN114260282B (en) * | 2021-12-03 | 2024-04-12 | 灌南新苏国丰新能源有限公司 | Fly ash landfill method for garbage incineration power plant |
| CN116140322A (en) * | 2022-09-22 | 2023-05-23 | 江苏生久环境科技有限公司 | Landfill fly ash landfill method |
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Application publication date: 20200522 |
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