CN212384256U - Flexible landfill yard that gives up danger - Google Patents
Flexible landfill yard that gives up danger Download PDFInfo
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- CN212384256U CN212384256U CN202020135430.5U CN202020135430U CN212384256U CN 212384256 U CN212384256 U CN 212384256U CN 202020135430 U CN202020135430 U CN 202020135430U CN 212384256 U CN212384256 U CN 212384256U
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Abstract
The utility model provides a hazardous waste flexible landfill, which comprises a landfill body, wherein a partition wall is arranged in the landfill body to divide the landfill body into two or more partitions; in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device; the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer; the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, an HDPE layer and a non-woven geotextile layer 2 from bottom to top; the secondary flexible freight bag is provided with a vacuum pumping port and a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation. The utility model discloses a "three layer construction secondary flexible container subregion landfill + vacuum monitoring", realize real-time monitoring, effective control has reduced the risk in danger useless landfill. The utility model also provides a useless flexible landfill system of danger.
Description
Technical Field
The utility model belongs to the technical field of hazardous waste handles, especially, relate to a useless flexible landfill yard of danger and useless flexible landfill system of danger.
Background
A dangerous waste landfill site is a land disposal facility for disposing dangerous waste, which consists of a plurality of disposal units and structures and mainly comprises a receiving and storing facility, an analyzing and identifying system, a pretreatment facility, a landfill disposal facility (comprising an anti-seepage system, a percolate collecting and draining system), a sealing covering system, a percolate and waste water treatment system, an environment monitoring system, an emergency facility and other public works and supporting facilities.
The bottom of the flexible landfill is an impermeable layer composed of clay, geotextile, HDPE (high-density polyethylene) film and the like, and based on cost consideration, the storage capacity of a common single storage area of the flexible landfill is 4.5 ten thousand meters3In the above, if it takes at least one year to fill a reservoir area, after the hazardous waste meeting the hazardous waste landfill pollution control standard (GB18598) is introduced, the hazardous waste is received, disposed of and taken good after the procedure of "repeat pound, temporary storage or landfill, temporary covering or closing". And (5) performing operation flow of a landfill operation area of the safety landfill. In the landfillThe following landfill mainly occurs in the process: 1. the large storage capacity of the landfill causes the working face to be too large, and the hazardous waste cannot be effectively controlled within the safety range; 2. if temporary covering is not in place in the landfill operation, high-concentration percolate can be generated in rainy and snowy days, the risk of secondary pollution of the percolate is caused in summer, and the risk of freezing damage of the percolate to an anti-seepage system is caused in winter; 3. the risk of generating a large amount of hazardous waste and flying dust in windy weather due to inadequate protection in landfill operation; 4. The dangerous waste contains complex dangerous waste such as salt and the like, which is easy to generate percolate and landfill gas, and the landfill gas causes fire and explosion risks.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a useless flexible landfill yard of danger, the useless flexible landfill system of danger and the useless landfill risk's of control danger method, the utility model provides a dangerous waste material landfill yard can effectively monitor and prevent that filtration liquid, barrier layer leak and landfill gas etc. environmental risk.
The utility model provides a hazardous waste flexible landfill, which comprises a landfill body, wherein the landfill body consists of a landfill bottom and a side slope, and a partition wall is arranged in the landfill body to divide the landfill body into two or more partitions;
in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device;
the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer;
a clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; a concrete film bag is arranged on the surface of the slope section of the protective layer on the film;
the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, a high-density polyethylene layer and a non-woven geotextile layer 2 from bottom to top;
the bottom, the side edge and the top of the secondary flexible freight bag are provided with vacuum pumping ports, and the top of the secondary flexible freight bag is provided with a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation.
Preferably, the compactness of the clay protective layer is more than or equal to 93%, and the thickness of the clay protective layer is 30-100 cm;
the percolate collecting and guiding layer is a composite geotechnical drainage net with the thickness of 1-10 mm;
the thickness of the fine sand protective layer is 30-80 cm.
Preferably, the protective layer under the film is 500-800 g/m2The nonwoven geotextile of (1);
the secondary impermeable layer is an HDPE smooth film; the thickness of the secondary impermeable layer is 1-3 mm;
the thickness of the composite geotechnical drainage net layer is 1-10 mm;
the main impermeable layer is an HDPE smooth film; the thickness of the main impermeable layer is 1-5 mm;
the protective layer on the film is 500-800 g/m2The nonwoven geotextile.
Preferably, the gram weight of the non-woven geotextile layer 1 is 400-600 g/m2；
The thickness of the high-density polyethylene layer is 1-5 mm;
the gram weight of the non-woven geotextile is 400-600 g/m2。
Preferably, the vacuum port is provided with an on-line replaceable filter.
Preferably, two vacuumizing ports are formed in the bottom of the secondary flexible freight bag, and one vacuumizing port and two negative pressure meters are arranged at the top of the secondary flexible freight bag.
Preferably, the height of the partition wall is integral multiple of the height of the bagged hazardous waste.
The utility model provides a flexible landfill system of useless danger, dispose facility, seal covering system, filtration liquid and effluent disposal system, environmental monitoring system, emergency facilities and other public works and supporting facility including receiving and storing facility, analysis and differentiation system, preliminary treatment facility, landfill, the landfill is disposed of the facility and is the above the flexible landfill of hazardous waste.
Preferably, the wind field coverage system sequentially comprises a high-density polyethylene geomembrane with double rough surfaces and a thickness of 0.5-2 mm and 400-700 g/m from bottom to top2The non-woven geotextile layer and the vegetation recovery layer with the thickness of 500-600 mm.
The utility model provides a method for controlling dangerous waste landfill risk, including following step:
stacking the bagged hazardous wastes qualified by the re-inspection into a secondary container bag of a landfill, filling a partition, carrying out bag sealing and vacuum pumping treatment on the filled partition, and finally carrying out field sealing treatment; monitoring the dangerous waste landfill condition according to the detection pressure of the negative pressure meter;
the landfill is the dangerous waste flexible landfill.
The utility model provides a hazardous waste flexible landfill, which comprises a landfill body, wherein the landfill body consists of a landfill bottom and a side slope, and a partition wall is arranged in the landfill body to divide the landfill body into two or more partitions; in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device; the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer; a clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; a concrete film bag is arranged on the surface of the slope section of the protective layer on the film; the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, a high-density polyethylene layer and a non-woven geotextile layer 2 from bottom to top; the bottom of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter, and the top of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation. The utility model discloses a "three layer construction secondary flexible container subregion landfill + vacuum monitoring", effectually reduced risks such as useless landfill back filtration liquid leakage of danger to can accurately monitor risks such as the production of seepage and landfill gas, realize the real-time monitoring, effective control has reduced the risk of the useless landfill yard of danger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an overall layout diagram of the hazardous waste flexible landfill of the utility model;
wherein 1-1 is a crystalline salt landfill 1 area, 1-2 is a crystalline salt landfill 2 area, 1-3 is a crystalline salt landfill 3 area, 2 is a fly ash landfill area, 3-1 is a slag landfill 1 area, 3-2 is a slag landfill 2 area, and 3-3 is a slag landfill 3 area;
FIG. 2 is a schematic structural view of the secondary flexible freight bag after being sealed;
wherein A is a non-woven geotextile 1, B is a high-density polyethylene layer, C is a non-woven geotextile 2, D is a dangerous waste for wrapping and burying, and E is a bottom anti-seepage structure;
FIG. 3 is a schematic structural view of the seepage-proofing device of the hazardous waste flexible landfill site of the utility model;
wherein, a is a bottom anti-seepage structure chart, and b is a side slope anti-seepage structure chart; 1 is a basic layer, 2 is a lower protective layer, 3 is a secondary impermeable layer, 4 is a composite geotechnical drainage net layer, 5 is a main impermeable layer, 6 is an upper protective layer, 7 is a clay protective layer, 8 is a percolate collecting and guiding layer, 9 is a fine sand protective layer, and 10 is a concrete film bag;
FIG. 4 is a schematic view of a partitioned structure of a hazardous waste flexible landfill; the landfill in FIG. 4 is divided into upper and lower two levels, four zones for each level;
figure 5 is the utility model discloses the useless flexible landfill operation flow chart of danger.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a hazardous waste flexible landfill, which comprises a landfill body, wherein the landfill body consists of a landfill bottom and a side slope, and a partition wall is arranged in the landfill body to divide the landfill body into two or more partitions;
in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device;
the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer;
a clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; a concrete film bag is arranged on the surface of the slope section of the protective layer on the film;
the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, a high-density polyethylene layer and a non-woven geotextile layer 2 from bottom to top;
the bottom of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter, and the top of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation.
The utility model discloses in, the landfill body includes landfill bottom and the side slope of slope all around, the slope rate of side slope (interior slope) is preferred 1: (2-3), more preferably 1: 2.5. the utility model discloses there is not special restriction, specific to the reservoir capacity of landfill body, the utility model provides a reservoir capacity can be 4.5 ~ 25 ten thousand meters3Specifically, it may be 4.5 km38.7 km3Or 22.6 km3. The ground of the landfill body is preferably regular and flat square or rectangular
Be provided with the division wall in the landfill yard, the division wall will the landfill yard body is separated for two or the subregion more than two, the utility model discloses it is right the number of subregion does not have special restriction, according to daily work load and the whole size in storehouse district divide can.
Preferably, the utility model discloses two-layer about being divided into the landfill, every layer divides the subregion in proper order again, and the height on every layer is counted with the integer multiple of ton bag, for example the utility model discloses an in the embodiment, the lower floor divide into 4 subregions, highly is three-layer ton bag, and the upper strata is 4 subregions, highly is four layers ton bag, and two-layer total height is the total degree of depth of reservoir area of landfill.
In the utility model discloses in, the high no special restriction of division wall, generally for convenient landfill, the dangerous waste material that needs the landfill generally carries out the landfill again after bagging with, consequently, the high preferred integer multiple of dangerous useless height in bags of division wall.
In each subarea, an anti-seepage device and a secondary flexible freight bag are sequentially covered on the landfill body.
In the utility model, the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage net layer, a main anti-seepage layer and an upper protective layer; the anti-seepage device covers the bottom and the side slope of the landfill. A clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; and a concrete film bag is arranged on the surface of the slope section of the upper protective layer of the film.
The utility model discloses in, the foundation bed carries out the compaction for original landfill body excavation layer and obtains, the compactness of foundation bed is preferred to be more than or equal to 90%.
The compaction degree of the clay protective layer is preferably more than or equal to 93%, and the thickness of the clay protective layer is preferably 30-100 cm, more preferably 40-80 cm, and most preferably 50-70 cm.
The lower protective layer is preferably a non-woven geotextile, and the gram weight of the non-woven geotextile is preferably 500-800 g/m2More preferably 600 to 700g/m2。
The secondary impermeable layer is preferably a high-density polyethylene (HDPE) gloss film, and the thickness of the secondary impermeable layer is preferably 1-3 mm, and more preferably 1.5-2.5 mm.
The composite geotechnical drainage net layer is an auxiliary drainage layer and a leakage detection layer, and the thickness of the composite geotechnical drainage net layer is preferably 1-10 mm, more preferably 3-8 mm, and most preferably 5-7 mm.
The main impermeable layer is preferably an HDPE (high-density polyethylene) light film, and the thickness of the main impermeable layer is preferably 1-5 mm, more preferably 2-4 mm, and most preferably 2-3 mm.
The membrane upper protective layer is preferably non-woven geotextile, and the gram weight of the non-woven geotextile is preferably 500-800 g/m2More preferably 600 to 700g/m2。
The leachate collection and guide layer is preferably a composite geotechnical drainage net layer, and the thickness of the leachate collection and guide layer is preferably 1-10 mm, more preferably 3-8 mm, and most preferably 5-7 mm.
The thickness of the fine sand protective layer is preferably 30-80 cm, and the fine sand protective layer mainly acts as a guide and drainage layer for sun protection.
The utility model discloses on the basis of anti-seepage device, from the high side of landfill the non-woven geotechnological cloth layer 1, high density polyethylene layer (HDPE layer) and non-woven geotechnological cloth layer 2 are laid in proper order from bottom of the reservior to domatic from bottom to top, form three layer construction's secondary flexible container.
The gram weight of the non-woven geotextile layer 1 is preferably 400-600 g/m2More preferably 450 to 500g/m2Most preferably 470g/m2(ii) a The thickness of the HDPE layer is preferably 1-5 mm, more preferably 1.5-4 mm, and most preferably 1.5-3 mm; the gram weight of the non-woven geotextile layer 1 is preferably 400-600 g/m2More preferably 450 to 500g/m2Most preferably 470g/m2。
The anti-seepage performance of HDPE membrane is the main index of whether measuring rubbish sanitary landfill site and reaching the environmental protection requirement, the utility model discloses a 1.5mm thick HDPE membrane seepage prevention coefficient is high, and is not absolute impervious gas alone, onlyAre impermeable to water and air relative to geotextiles or fill and even clay. The data measured by the water vapor permeability test is 0.5 multiplied by 10-10～0.5×10-13cm/s; the high-strength high-elongation-resistance mechanical property is high, the breaking tensile strength is 28Mpa, the breaking elongation is 700 percent, and the high elasticity and the deformation capability ensure that the high-strength high-elongation-resistance high-elasticity high-elongation-resistance high-; the paint has excellent chemical stability, high temperature resistance, asphalt resistance, oil resistance, tar resistance, strong acid and alkali resistance and other chemical medium corrosion resistance; the paint has excellent ageing resistance, ultraviolet resistance and decomposition resistance, and the service life is 50-70 years; the cost is low, and the cost is saved by about 50 percent through actual measurement and calculation in the general engineering adopting the HDPE impermeable membrane; in addition, the construction speed is high, the environment is protected, and no toxicity is caused.
The utility model discloses in 470g/m that uses2The non-woven geotextile has high strength, can keep sufficient strength and elongation in a dry and wet state, is corrosion-resistant, has good water permeability and good antimicrobial property, is convenient to construct, and is not damaged by microorganisms and worm damage.
The utility model discloses a 1.5mmHDPE membrane can guarantee prevention of seepage effect, can pass through 470g/m again2The non-woven geotextile prevents sharp objects on the inner side and the outer side from piercing the HDPE film by 1.5 mm.
The utility model discloses in, bottom, side and the top of secondary flexible container all are provided with the evacuation mouth, the top of secondary flexible container is provided with the negative pressure table, the utility model discloses it is right no special restriction in the concrete position of evacuation mouth, can guarantee in the evacuation that vacuum space evenly distributed and fully consider the convenience of work can, the negative pressure table is preferred to be set up the corner is convenient for daily patrol and examine and maintain. Whether leakage or landfill gas is generated can be judged through the pressure reading of the negative pressure gauge, and therefore the risk of a landfill site is reduced to the minimum.
The utility model discloses in, every the evacuation mouth all is provided with the filter that can change on line to avoid evacuation in-process powdered hazardous waste to block up.
The utility model also provides a flexible landfill system of useless danger, dispose facility, seal cover system, filtration liquid and effluent disposal system, environmental monitoring system, emergency facilities and other public works and supporting facility including receiving and storing facility, analysis and differentiation system, preliminary treatment facility, landfill, the landfill dispose facility the above the flexible landfill of hazardous waste.
Based on above-mentioned useless flexible landfill system of danger, the utility model also provides a method of the useless landfill risk of control danger, including following step:
stacking the bagged hazardous wastes qualified by the re-inspection into a secondary container bag of a landfill, filling a partition, carrying out bag sealing and vacuum pumping treatment on the filled partition, and finally carrying out field sealing treatment; monitoring the dangerous waste landfill condition according to the detection pressure of the negative pressure meter;
the method flow of the utility model is shown in figure 3, and the incoming material is firstly retested to check whether the hazardous waste component conforms to GB 18598-. And (4) transporting the high-wind and other severe environments to a temporary storage area for temporary storage, and transporting to a landfill site for landfill operation after the environment allows.
Then, conveying bagged dangerous wastes which are analyzed and accord with hazardous waste landfill pollution control standards (GB 18598-2001) to the bottom of a reservoir area along an entrance road, sequentially hoisting the wastes to a pre-prepared three-layer structure secondary flexible freight bag by using a crane, stacking the wastes along the bottom and a side slope of the reservoir area to form a flexible freight bag (18M 23M 75M 2M) which is approximately in a trapezoidal structure, sealing the flexible freight bag as a first subarea, vacuumizing the flexible freight bag by using a vacuum pump after sealing the flexible freight bag, and monitoring that the negative pressure value reaches-20 Pa by using two negative pressure meters arranged at the corners of the opposite positions of the three-layer structure secondary flexible freight bag. And by parity of reasoning, carrying out partition landfill and identification treatment according to the hazardous wastes received from different production and waste units. In the inspection process, when the monitoring pressure of the negative pressure meter is less than-5 Pa, the possibility of HDPE film breakage exists; when the monitoring pressure of the negative pressure gauge is greater than 0Pa, the risk of landfill gas generation exists, and monitoring is enhanced and emergency preparation of corresponding monitoring conditions is made.
Before the secondary flexible freight bag is sealed, the landfill operation area is temporarily covered by 0.8mm HDPE film after the operation every day is finished.
Finally, after the landfill operation reaches the design elevation, the landfill is sealed, and the HDPE geomembrane (impervious layer) with the double rough surfaces of 1.0mm and the 600g/m are sequentially arranged from bottom to top2Non-woven geotextile (protective layer) and a 600mm vegetation restoration layer, and greening treatment is carried out on the vegetation restoration layer.
After landfill hazardous waste generates leachate, the leachate is collected through a leachate and wastewater treatment system, and is subjected to reverse osmosis (SRO) and single-effect evaporation treatment, and the leachate enters a sewage treatment plant for further treatment and recovery.
In the present invention, the collecting and storing facilities, the analyzing and identifying system, the pre-treating facilities, the leachate and wastewater treatment system, the environmental monitoring system, the emergency facilities and other utilities and supporting facilities are all the supporting devices known to those skilled in the art, and will not be described herein.
The utility model provides a hazardous waste flexible landfill, which comprises a landfill body, wherein the landfill body consists of a landfill bottom and a side slope, and a partition wall is arranged in the landfill body to divide the landfill body into two or more partitions; in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device; the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer; a clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; a concrete film bag is arranged on the surface of the slope section of the protective layer on the film; the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, a high-density polyethylene layer and a non-woven geotextile layer 2 from bottom to top; the bottom of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter, and the top of the secondary flexible freight bag is provided with a vacuumizing port and a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation. The utility model discloses a "three layer construction secondary flexible container subregion landfill + vacuum monitoring", effectually reduced risks such as useless landfill back filtration liquid leakage of danger to can accurately monitor risks such as the production of seepage and landfill gas, realize the real-time monitoring, effective control has reduced the risk of the useless landfill yard of danger.
Example 1
The general layout of the hazardous waste flexible landfill is shown in figure 1, and the storage area capacity is 4.5 ten thousand meters 36 ten thousand meters38.7 km3Or 22.6 km3The anti-seepage structure of each reservoir area is shown in figure 2, and comprises a base layer, a clay protective layer (the compactness is more than or equal to 93 percent and the thickness is 50cm) and 600g/m from bottom to top respectively2Non-woven geotextile (protective layer under membrane), HDPE (high-density polyethylene) light film (secondary impermeable layer) with thickness of 1.5mm, composite geotechnical drainage net (auxiliary drainage layer and leakage detection layer) with thickness of 5mm, HDPE light film (main impermeable layer) with thickness of 2.0mm, 600g/m2Non-woven geotextile (protective layer on the membrane), composite geotechnical drainage net (percolate collecting and guiding layer) with thickness of 5mm, and fine sand protective layer (thickness 50 cm).
470g/m are sequentially paved from the high side of the landfill area to the bottom of the east-west storehouse and the slope from bottom to top2Non-woven geotextile, 1.5mm HDPE film, 470g/m2And (4) manufacturing the non-woven geotextile into a three-layer structure secondary flexible freight bag.
Then, conveying the bagged dangerous wastes which are analyzed and meet the hazardous waste landfill pollution control standard (GB 18598-2001) to the bottom of the reservoir area along an entrance road, sequentially hoisting the wastes to a pre-prepared three-layer secondary flexible freight bag by a crane, stacking the wastes into flexible freight bags (18m 23m 75m 2m) with an approximate trapezoid structure along the bottom and side slopes of the reservoir area, and sealing the flexible freight bags as a first partition, wherein the partition can realize about 3000m3The landfill volume of hazardous waste, adopt the vacuum pump to carry out evacuation processing to the flexible container after the envelope, for improving evacuation efficiency, guarantee the convenience of vacuum space evenly distributed and work, set up three evacuation mouth as shown in figure 4 and carry out evacuation processing, the evacuation mouth sets up the filter that can change on line, avoid among the evacuation process powdered dangerous waste to block up, and through two negative pressure table monitoring burden that set up in the corner of "three layer construction secondary flexible container" relative position (the maintenance of daily inspection of being convenient for)The pressure value reaches-20 Pa. And by parity of reasoning, carrying out partition landfill and identification treatment according to the hazardous wastes received from different production and waste units. In the inspection process, when the monitoring pressure of the negative pressure meter is less than-5 Pa, the possibility of HDPE film breakage exists; when the monitoring pressure of the negative pressure gauge is greater than 0Pa, the risk of landfill gas generation exists, and monitoring is enhanced and emergency preparation of corresponding monitoring conditions is made.
When landfill gas appears, the negative pressure meter monitoring port or the vacuumizing port can be used for timely collecting and processing, and resource utilization can be further realized even.
Before the flexible freight bag is sealed, the landfill operation area is temporarily covered by 0.8mm HDPE film after the operation every day is finished.
Finally, after the landfill operation reaches the design elevation, the landfill is sealed, and the HDPE geomembrane (impervious layer) with the double rough surfaces of 1.0mm and the 600g/m are sequentially arranged from bottom to top2Non-woven geotextile (protective layer) and a 600mm vegetation restoration layer, and greening treatment is carried out on the vegetation restoration layer.
Claims (7)
1. The hazardous waste flexible landfill is characterized by comprising a landfill body, wherein the landfill body consists of a landfill bottom and a side slope, and a partition wall is arranged in the landfill body and divides the landfill body into two or more partitions;
in each subarea, an anti-seepage device is covered on the landfill body, and a secondary flexible freight bag is covered on the anti-seepage device;
the anti-seepage device comprises a base layer, a lower protective layer, a secondary anti-seepage layer, a composite geotechnical drainage mesh layer, a main anti-seepage layer and an upper protective layer;
a clay protective layer is arranged between the bottom section of the base layer and the bottom section of the lower protective layer, and a percolate collecting and draining layer and a fine sand protective layer are sequentially arranged on the surface of the bottom section of the upper protective layer from bottom to top; a concrete film bag is arranged on the surface of the slope section of the protective layer on the film;
the secondary flexible freight bag sequentially comprises a non-woven geotextile layer 1, a high-density polyethylene layer and a non-woven geotextile layer 2 from bottom to top;
the bottom, the side edge and the top of the secondary flexible freight bag are provided with vacuum pumping ports, and the top of the secondary flexible freight bag is provided with a negative pressure meter; the negative pressure gauge is used for monitoring film layer breakage and landfill gas generation.
2. The hazardous waste flexible landfill according to claim 1, wherein the clay protection layer has a compaction degree of 93% or more and a thickness of 30-100 cm;
the percolate collecting and guiding layer is a composite geotechnical drainage net with the thickness of 1-10 mm;
the thickness of the fine sand protective layer is 30-80 cm.
3. The hazardous waste flexible landfill according to claim 1, wherein the protective layer under the membrane is 500-800 g/m2The nonwoven geotextile of (1);
the secondary impermeable layer is an HDPE smooth film; the thickness of the secondary impermeable layer is 1-3 mm;
the thickness of the composite geotechnical drainage net layer is 1-10 mm;
the main impermeable layer is an HDPE smooth film; the thickness of the main impermeable layer is 1-5 mm;
the protective layer on the film is 500-800 g/m2The nonwoven geotextile.
4. The hazardous waste flexible landfill according to claim 1, wherein the gram weight of the non-woven geotextile layer 1 is 400-600 g/m2；
The thickness of the high-density polyethylene layer is 1-5 mm;
the gram weight of the non-woven geotextile is 400-600 g/m2。
5. The hazardous waste flexible landfill according to claim 1, wherein the vacuum port is provided with an on-line replaceable filter.
6. The hazardous waste flexible landfill according to claim 1, wherein the secondary flexible container bag is provided with two vacuum ports at the bottom and one vacuum port and two negative pressure meters at the top.
7. The hazardous waste flexible landfill according to claim 1, wherein the height of the dividing wall is an integral multiple of the height of the bagged hazardous waste.
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| CN202020135430.5U CN212384256U (en) | 2020-01-21 | 2020-01-21 | Flexible landfill yard that gives up danger |
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| CN111151549A (en) * | 2020-01-21 | 2020-05-15 | 科领环保股份有限公司 | Hazardous waste flexible landfill, hazardous waste flexible landfill system and method for controlling hazardous waste landfill risk |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151549A (en) * | 2020-01-21 | 2020-05-15 | 科领环保股份有限公司 | Hazardous waste flexible landfill, hazardous waste flexible landfill system and method for controlling hazardous waste landfill risk |
| CN111151549B (en) * | 2020-01-21 | 2024-05-28 | 科领环保股份有限公司 | Hazardous waste flexible landfill site, hazardous waste flexible landfill system and method for controlling hazardous waste landfill risk |
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