CN113385516A - Method and device for processing earthwork of refuse landfill - Google Patents
Method and device for processing earthwork of refuse landfill Download PDFInfo
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- CN113385516A CN113385516A CN202110538693.XA CN202110538693A CN113385516A CN 113385516 A CN113385516 A CN 113385516A CN 202110538693 A CN202110538693 A CN 202110538693A CN 113385516 A CN113385516 A CN 113385516A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 title claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 84
- 239000010802 sludge Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000012216 screening Methods 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 239000002699 waste material Substances 0.000 claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000004332 deodorization Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000001723 curing Methods 0.000 claims description 108
- 239000002689 soil Substances 0.000 claims description 28
- 238000009412 basement excavation Methods 0.000 claims description 14
- 241000196324 Embryophyta Species 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 239000002781 deodorant agent Substances 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 235000014676 Phragmites communis Nutrition 0.000 claims description 5
- 230000001877 deodorizing effect Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 244000052616 bacterial pathogen Species 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000009533 lab test Methods 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 4
- 239000002957 persistent organic pollutant Substances 0.000 claims description 4
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- 239000011573 trace mineral Substances 0.000 claims description 4
- 235000013619 trace mineral Nutrition 0.000 claims description 4
- 208000005189 Embolism Diseases 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 2
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- 238000011049 filling Methods 0.000 description 5
- 244000273256 Phragmites communis Species 0.000 description 3
- 238000013461 design Methods 0.000 description 3
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method and a device for treating earthwork of a refuse landfill, which comprises a miscellaneous fill treatment component, a sludge layer treatment component and a backfill treatment component; the miscellaneous fill processing assembly comprises a surface cleaning device, a deodorization dust-settling device, a screening processing device, a water seepage processing device, a curing agent preparation device and a first stirring device; the sludge layer treatment assembly comprises a pre-detection device, a curing agent manufacturing device, a second stirring device and a curing tedding device. The invention uses the material of the operation area, realizes the recycling and does not generate new waste; odor is effectively inhibited and dust emission is reduced in the construction process; the construction period is short and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of earthwork treatment, in particular to an earthwork treatment method and device for a refuse landfill.
Background
The garbage disposal method can be generally divided into several methods such as sanitary landfill, incineration, composting and the like. The refuse landfill is a refuse centralized stacking site adopting a sanitary landfill mode, and the refuse sanitary landfill is widely applied in China due to low cost and good sanitary degree. The refuse landfill is generally treated in a layered earthing and landfill mode, and a layer of loess is covered after a layer of refuse is stacked, so that the pollution of the refuse is easily reduced; a large amount of miscellaneous filling soil exists in the earthwork of the refuse landfill, and the miscellaneous filling soil and slurry soil need to be cured before construction; the efficiency of processing miscellaneous filling soil in the prior art is low, and the actual requirement can not be met.
In order to solve the above problems, the present application provides a method and a device for processing earthwork of a refuse landfill.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a method and a device for treating earthwork of a refuse landfill, which have the advantages that materials in an operation area are used, the cyclic utilization is realized, and new wastes are not generated; odor is effectively inhibited and dust emission is reduced in the construction process; short construction period and high efficiency.
In order to solve the technical problem, the invention provides an earthwork treatment device of a refuse landfill, which comprises a miscellaneous fill treatment component, a sludge layer treatment component and a backfill treatment component;
the miscellaneous fill processing assembly comprises a surface cleaning device, a deodorization dust-settling device, a screening processing device, a water seepage processing device, a curing agent preparation device and a first stirring device;
the sludge layer treatment assembly comprises a pre-detection device, a curing agent manufacturing device, a second stirring device and a curing tedding device.
Preferably, the surface cleaning device comprises an excavator, and the surface cleaning device is used for cleaning reeds, weeds and household garbage on the surface of the landfill and carrying out classified centralized treatment;
the deodorization dust-settling device comprises a fog machine, and is provided with a plurality of groups of up-down wind directions which are respectively arranged in a landfill area;
the screening treatment device comprises a belt conveyor and a roller type screening machine, wherein a feed hopper is arranged on the belt conveyor, and the belt conveyor supplies materials towards the roller type screening machine;
the water seepage treatment device comprises a plurality of water pumps and water pipes;
the curing agent preparation device is used for trial preparation of a curing agent formula;
the first stirring device is provided with a variable frequency motor, and the stirring device is used for stirring the muck and the curing agent.
Preferably, a dosing box for adding a deodorant is arranged on the mist sprayer.
Preferably, the pre-detection device comprises a block delimiting unit and a digging machine;
the curing agent manufacturing device manufactures the curing agent on site and pumps the curing agent to the curing site through a pipeline by an embolism pump;
the second stirring device comprises a buoyancy tank crawler-type excavator configured with a double-wheel mill stirrer and can stir the curing agent and the turned regional sludge.
Preferably, the backfill processing assembly carries out layered backfill, and the backfill processing assembly carries out cleaning and compaction on a backfill foundation, wherein the compaction is not less than 3 times.
Preferably, after the dredging treatment is finished, the sludge layer is treated by adopting an in-situ curing technology; the curing depth is not less than 2 m.
The invention also provides a method for treating earthwork of the refuse landfill, which comprises the following steps:
s1, cleaning the surface of the landfill, reeds, weeds, household garbage and the like by using a digging machine, classifying according to different classes, performing classified centralized treatment, and transporting waste materials with higher heat value to an external power plant for incineration;
s2, spraying a deodorizing bactericide on the ground surface before excavation; arranging a fog blasting machine in the vertical wind direction of the landfill area to spray and dry a deodorant;
s3, digging out the miscellaneous fill by using a digging machine, feeding the miscellaneous fill into a screening treatment feeding hopper, conveying the miscellaneous fill to a drum-type screening machine by a belt conveyor, and screening;
s4, pumping low seepage water generated in the foundation pit after excavation to a sewage pipe network by using a water pump, and concentrating treatment of a sewage treatment plant;
s5, taking a certain amount of muck samples, trial-preparing the formula of the waste soil curing agent, and determining the optimal formula according to the experimental result.
S6, according to the formula ratio of the laboratory curing agent, the curing background carries out the production line preparation of the curing agent on site; the spiral conveyer outputs and uses;
s7, controlling the addition amount of the curing agent through a variable frequency motor according to the harmless mixing amount ratio of the waste soil and the flow rate of a muck hoister, and simultaneously feeding the muck and the curing agent into a forced stirrer to fully and uniformly stir the muck and the curing agent when the muck and the curing agent are discharged from a bin;
s8, mixing the muck and the curing agent and stacking the mixture to consume and degrade organic pollutants and trace elements in the muck; passivating and decomposing heavy metal ions and pathogenic bacteria, adjusting and controlling the treated mixed material to have a water content of 20% according to the requirement of compactness, and backfilling.
Preferably, the waste metal and plastic wastes screened in the S3 are classified and packaged; the waste with high calorific value of the dead-branch weeds and plastics is transported to a power plant for incineration or sent to a garbage regeneration center; the brick, tile and stone are selected according to the utilization value; the screened dregs fall into a lifting hopper, are conveyed to a forced stirrer by a screw conveyor, and are mixed and stirred with a curing agent.
Preferably, setting a range of 10mX10m in a sludge solidification area, and measuring the water content and volume weight of the stockpiled sludge; simply digging a sludge layer in the defined area; and leveling the foundation of the low-lying part to ensure that the curing construction is finally integrated.
Preferably, according to the sludge treatment requirement, the laboratory test components are sampled by combining the sludge soil condition and equipment model selection, and the formula and the type of the curing agent are determined; according to the formula ratio of the curing agent, the curing agent is prepared on site at a curing background to prepare a curing wet agent, and the curing wet agent is pumped to a curing site for use by a plug pump through a pipeline.
The technical scheme of the invention has the following beneficial technical effects:
1. before excavation, a deodorizing microbial inoculum is sprayed on the surface of the field, and odor molecules are rapidly decomposed under the action of the active microbial inoculum, so that the odor concentration in the excavation process is reduced. In the excavation process, according to foul smell concentration, arrange big gun fog machine at the upper and lower wind direction in the landfill district, the deodorant is shone in the spraying, ensures can not cause the influence to peripheral resident, and big gun fog machine can the effective control raise dust in the work progress simultaneously.
2. Screening treatment: digging out the miscellaneous fill soil by using a digging machine, screening the miscellaneous fill soil by using a screening feeding hopper, conveying the miscellaneous fill soil to a drum-type screening machine by using a belt conveyor, screening out waste metal and plastic waste products, and classifying and packaging the waste metal and plastic waste products; the waste with high calorific value of the dead-branch weeds and plastics is transported to a power plant for incineration or sent to a garbage regeneration center; the brick, tile and stone are selected according to the utilization value; the screened dregs fall into a lifting hopper, are conveyed to a forced stirrer by a screw conveyor, and are mixed and stirred with a curing agent.
3. The invention uses the material of the operation area, realizes the recycling and does not generate new waste; odor is effectively inhibited and dust emission is reduced in the construction process; the construction period is short and the efficiency is high.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of the process of filling soil with impurities according to the present invention;
FIG. 3 is a schematic view showing a flow of sludge layer treatment in the present invention;
FIG. 4 is a schematic view of the treatment method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-3, the earthwork treatment device of a refuse landfill provided by the invention comprises a miscellaneous fill treatment component, a sludge layer treatment component and a backfill treatment component;
the miscellaneous fill processing assembly comprises a surface cleaning device, a deodorization dust-settling device, a screening processing device, a water seepage processing device, a curing agent preparation device and a first stirring device;
the sludge layer treatment assembly comprises a pre-detection device, a curing agent manufacturing device, a second stirring device and a curing tedding device.
In this embodiment, the surface cleaning device comprises a digging machine, and the surface cleaning device is used for cleaning the surface reeds, weeds and domestic garbage of the landfill and carrying out classification and centralized treatment.
The deodorization dust settling device is a fog gun, and is provided with a plurality of groups of upper and lower wind directions which are respectively installed in the landfill area.
Screening processing apparatus includes belt feeder and drum-type screening machine, install the feeder hopper on the belt feeder, the belt feeder orientation the drum-type screening machine feed.
The water seepage treatment device comprises a plurality of water pumps and water pipes.
The curing agent preparation device is used for trial preparation of a curing agent formula.
The first stirring device is provided with a variable frequency motor and stirs the muck and the curing agent.
In this embodiment, the mist sprayer is provided with a dosing box for adding a deodorant.
In this embodiment, the pre-detection device includes a block delimiting unit and a shovel.
The curing agent manufacturing device manufactures the curing agent on site and pumps the curing agent to the curing site through a pipeline by an embolism pump.
The second stirring device is for example provided with a double-wheel mill mixer for a pontoon crawler excavator and stirs the curing agent and the stirred area sludge.
In the embodiment, the backfill processing assembly carries out layered backfill, and the backfill processing assembly carries out cleaning and compaction on the backfill foundation, wherein the compaction is not less than 3 times, and can be 3-10 times, for example.
In this embodiment, after the dredging treatment is completed, the sludge layer is treated by an in-situ curing technique; the curing depth is not less than 2 m.
Referring to fig. 4, an embodiment of the present invention further provides a method for processing earthwork in a refuse landfill, including:
s1, cleaning sundries on the surface of the landfill site by using a digging machine, classifying according to different classes, and then classifying and carrying out centralized processing;
s2, spraying a deodorizing bactericide on the ground surface before excavation, arranging a mist spraying machine in the vertical wind direction of the landfill area, and spraying a deodorant;
s3, digging out the miscellaneous fill by using a digging machine, feeding the miscellaneous fill into a screening treatment feeding hopper, conveying the miscellaneous fill to a drum-type screening machine by a belt conveyor, and screening;
s4, pumping low seepage water generated in the foundation pit after excavation to a sewage pipe network by using a water pump, and concentrating treatment of a sewage treatment plant;
s5, taking a residue soil sample, trial-preparing a formula of the waste soil curing agent, and determining the formula according to an experimental result;
s6, preparing a curing agent production line, and outputting the curing agent for use by a screw conveyer;
s7, controlling the addition amount of the curing agent through a variable frequency motor according to the harmless mixing amount ratio of the waste soil and the flow rate of a muck hoister, and simultaneously feeding the muck and the curing agent into a forced stirrer to fully and uniformly stir the muck and the curing agent when the muck and the curing agent are discharged from a bin;
s8, mixing the muck and the curing agent and stacking the mixture to consume and degrade organic pollutants and trace elements in the muck; passivating and decomposing heavy metal ions and pathogenic bacteria, adjusting and controlling the treated mixed material according to the compactness requirement until the water content reaches the target, and backfilling.
In step S1, the sundries may include, but are not limited to, reed, weeds, household garbage, and the like. When the waste materials are classified and treated in a centralized way, the waste materials with higher heat value can be transported to a power plant for incineration.
In step S2, before excavation, a deodorizing agent is sprayed on the surface of the site, and odor molecules are rapidly decomposed by the active agent, thereby reducing the odor concentration during excavation. In the excavation process, according to foul smell concentration, arrange big gun fog machine at the upper and lower wind direction in the landfill district, the deodorant is shone in the spraying, ensures can not cause the influence to peripheral resident, and big gun fog machine can the effective control raise dust in the work progress simultaneously.
In step S3, screening waste metal and plastic waste, and sorting and packaging; the waste with high calorific value of the dead-branch weeds and plastics is transported to a power plant for incineration or sent to a garbage regeneration center; the brick, tile and stone are selected according to the utilization value; the screened dregs fall into a lifting hopper, are conveyed to a forced stirrer by a screw conveyor, and are mixed and stirred with a curing agent.
In step S4, water seepage: the low seepage water generated in the foundation pit after excavation is influenced by the water level below the foundation pit, and is pumped to a sewage pipe network by using a water pump to concentrate the treatment of a sewage treatment plant.
In step S5, a certain amount of muck sample is taken to perform laboratory tests, the water content, specific gravity and component condition of the soil are determined, the formula of the curing agent for the waste soil is prepared by trial according to the test results and the resource requirements, and a better formula is determined according to the test results.
In step S6, the curing agent production line is prepared in the field at the curing background according to the formulation ratio of the laboratory curing agent. The curing agent is prepared strictly according to the formula ratio by a precise metering device and is output by a screw conveyor for use.
In step S7, according to the harmless mixing amount ratio of the garbage soil and the flow rate of the muck hoister, the adding amount of the curing agent is controlled through a variable frequency motor, and the muck and the curing agent are fed into a forced stirrer, fully and uniformly stirred when being discharged from a bin, fall to a belt conveyor for output, and are placed still for stacking.
In step S8, the muck is stacked after being mixed with the curing agent, and organic pollutants and trace elements in the muck are consumed and degraded under the action of the curing agent; the heavy metal ions and pathogenic bacteria in the waste residue are passivated and decomposed to meet the requirements of national relevant standards, so that the waste residue is treated in a harmless and stable manner. And adjusting and controlling the treated mixed material to have a water content of 20% according to the requirement of compactness, and backfilling, wherein the water content can be set according to actual needs, for example, can be 10-30%.
In addition, the embodiment of the invention also comprises: after the above process, the construction of the sludge layer is carried out, which comprises: 1. construction preparation: dividing blocks. The range of the solidified sludge region may be, for example, 10mX10m, or may be, for example, a rectangular range having a length and a width of 1 to 20m, and the water content, the volume weight, or the like of the stockpiled sludge may be measured. And (9) excavating. The defined area is simply dug to obtain the condition of filling sludge, so that later curing and stirring operation is facilitated; and leveling the foundation of the low-lying part to ensure that the curing construction is finally integrated. Before starting work, the equipment is overhauled comprehensively, and the equipment is guaranteed to operate well.
2. Preparing a curing agent: according to the sludge treatment requirement, the laboratory test components are sampled by combining the sludge soil condition and equipment model selection, and the formula and the type of the curing agent are determined. Secondly, according to the formula ratio of the curing agent, the curing agent is prepared on site at a curing background to prepare a curing wet agent, and the curing wet agent is pumped to a curing site for use by a plug pump through a pipeline.
3. Stirring operation: the curing agent is directly pumped to a curing operation area through a pipeline, and the curing agent and the sludge in the turning area are stirred by a double-wheel milling and stirring device configured on the buoyancy tank crawler-type excavator. The pile bodies are connected into a whole, the lap joint of each curing operation is not less than 20cm, and the curing of the sludge tank is not missed.
4. Maintaining and tedding: (1) digging and crushing the sludge solidification area by using a digging machine, digging into a screening machine to convey a hopper, and screening out sundries and industrial waste in the sludge solidification soil. (2) And (4) simply spreading and tedding the screened solidified soil by using an excavator, and quickly reducing the water content to below 40% after a certain period of maintenance. (3) And then, screening and classifying the solidified soil after the sludge solidification treatment according to a miscellaneous filling process to prepare the backfill material meeting the requirements.
After the construction is carried out on the sludge layer, the method also comprises the following steps:
and (3) backfilling foundation treatment: according to the design elevation requirement, after the miscellaneous fill is dug, the backfill foundation is cleaned and compacted for not less than 3-4 times so as to ensure the bearing capacity requirement of the backfill foundation. According to the design of the backfill foundation elevation, if the backfill foundation is still a sludge layer after the excavation treatment and the miscellaneous fill is finished and the bearing capacity requirement of the backfill foundation cannot be met, the backfill foundation is treated by adopting an in-situ curing technology, the treatment depth is additionally set according to the depth of the sludge layer and the bearing capacity requirement after the treatment, and the backfill foundation can be usually cured for 1-2 m. And then carrying out layered backfilling, dehydrating, reducing and harmlessly treating the residue soil and the sludge according to the quality requirement of the backfilled soil, and when the water content is close to the optimal water content, uniformly paving the backfilled soil formed after the solidification treatment to a field-level backfilling foundation by using a forklift and a paver. The thickness of each virtual layer is 300mm, each layer is compacted for 6-8 times, and the compaction coefficient is ensured to meet the backfill quality requirement. And backfilling layer by layer until backfilling reaches the design elevation of the field level.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. The earthwork treatment device of the refuse landfill is characterized by comprising a miscellaneous landfill treatment component, a sludge layer treatment component and a backfill treatment component;
the miscellaneous fill processing assembly comprises a surface cleaning device, a deodorization dust-settling device, a screening processing device, a water seepage processing device, a curing agent preparation device and a first stirring device;
the sludge layer treatment assembly comprises a pre-detection device, a curing agent manufacturing device, a second stirring device and a curing tedding device.
2. The landfill earthmoving equipment of claim 1,
the surface cleaning device comprises an excavator, and is used for cleaning reeds, weeds and household garbage on the surface of the landfill and carrying out classified centralized treatment;
the deodorization dust-settling device comprises a fog machine, and is provided with a plurality of groups of up-down wind directions which are respectively arranged in a landfill area;
the screening treatment device comprises a belt conveyor and a roller type screening machine, wherein a feed hopper is arranged on the belt conveyor, and the belt conveyor supplies materials towards the roller type screening machine;
the water seepage treatment device comprises a plurality of water pumps and water pipes;
the curing agent preparation device is used for trial preparation of a curing agent formula;
the first stirring device is provided with a variable frequency motor, and the stirring device is used for stirring the muck and the curing agent.
3. The landfill earthwork treatment apparatus according to claim 2, wherein the fog gun is provided with a dosing tank for adding a deodorant.
4. The landfill earthmoving equipment of claim 1,
the pre-detection device comprises a block dividing unit and an excavator;
the curing agent manufacturing device manufactures the curing agent on site and pumps the curing agent to the curing site through a pipeline by an embolism pump;
the second stirring device comprises a buoyancy tank crawler-type excavator configured with a double-wheel mill stirrer and can stir the curing agent and the turned regional sludge.
5. The earth moving device of claim 1, wherein the backfill module backfills the backfill foundation layer by layer, and the backfill module cleans and compacts the backfill foundation not less than 3 times.
6. The earthwork treatment apparatus of a refuse landfill according to claim 5, wherein after the dredging treatment is completed, the sludge layer is treated by an in-situ solidification technique; the curing depth is not less than 2 m.
7. A landfill earthwork treatment method, a landfill earthwork treatment apparatus according to any one of claims 1 to 6, comprising the steps of:
s1, cleaning sundries on the surface of the landfill site by using a digging machine, classifying according to different classes, and then classifying and carrying out centralized processing;
s2, spraying a deodorizing bactericide on the ground surface before excavation, arranging a mist spraying machine in the vertical wind direction of the landfill area, and spraying a deodorant;
s3, digging out the miscellaneous fill by using a digging machine, feeding the miscellaneous fill into a screening treatment feeding hopper, conveying the miscellaneous fill to a drum-type screening machine by a belt conveyor, and screening;
s4, pumping low seepage water generated in the foundation pit after excavation to a sewage pipe network by using a water pump, and concentrating treatment of a sewage treatment plant;
s5, taking a residue soil sample, trial-preparing a formula of the waste soil curing agent, and determining the formula according to an experimental result;
s6, preparing a curing agent production line, and outputting the curing agent for use by a screw conveyer;
s7, controlling the addition amount of the curing agent through a variable frequency motor according to the harmless mixing amount ratio of the waste soil and the flow rate of a muck hoister, and simultaneously feeding the muck and the curing agent into a forced stirrer to fully and uniformly stir the muck and the curing agent when the muck and the curing agent are discharged from a bin;
s8, mixing the muck and the curing agent and stacking the mixture to consume and degrade organic pollutants and trace elements in the muck; passivating and decomposing heavy metal ions and pathogenic bacteria, adjusting and controlling the treated mixed material according to the compactness requirement until the water content reaches the target, and backfilling.
8. The method of claim 7, wherein the waste metal and plastic wastes screened in the step S3 are classified and packaged; the waste with high calorific value of the dead-branch weeds and plastics is transported to a power plant for incineration or sent to a garbage regeneration center; the brick, tile and stone are selected according to the utilization value; the screened dregs fall into a lifting hopper, are conveyed to a forced stirrer by a screw conveyor, and are mixed and stirred with a curing agent.
9. The method of claim 7, further comprising: setting the range of a sludge solidification area, and measuring the water content and the volume weight of the stockpiled sludge; simply digging a sludge layer in the defined area; and (5) leveling the foundation of the low-lying part, and finally forming a whole by curing construction.
10. The method of claim 7, wherein the formulation and type of the curing agent are determined by the sludge treatment requirements, by the combination of the sludge soil condition and equipment type, and laboratory test components; according to the formula ratio of the curing agent, the curing agent is prepared on site at a curing background to prepare a curing wet agent, and the curing wet agent is pumped to a curing site for use by a plug pump through a pipeline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115041277A (en) * | 2022-05-31 | 2022-09-13 | 中国电建集团武汉重工装备有限公司 | Self-compacting backfill preparation equipment and process based on crushing and screening |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115041277A (en) * | 2022-05-31 | 2022-09-13 | 中国电建集团武汉重工装备有限公司 | Self-compacting backfill preparation equipment and process based on crushing and screening |
| CN115041277B (en) * | 2022-05-31 | 2023-11-07 | 中国电建集团武汉重工装备有限公司 | Self-sealing backfill soil preparation equipment and process based on crushing and screening |
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