CN110743631A - Solid waste leachate collection and experiment simulation system - Google Patents
Solid waste leachate collection and experiment simulation system Download PDFInfo
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- CN110743631A CN110743631A CN201910934736.9A CN201910934736A CN110743631A CN 110743631 A CN110743631 A CN 110743631A CN 201910934736 A CN201910934736 A CN 201910934736A CN 110743631 A CN110743631 A CN 110743631A
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Abstract
The invention provides a solid waste leachate collection and experiment simulation system, which comprises a simulation experiment box, wherein an anti-leakage layer is paved on the bottom surface and the side wall surface of the simulation experiment box; the simulation experiment box comprises a simulation experiment box and is characterized in that a water outlet is formed in the bottom surface of the simulation experiment box, a drainage pipeline is communicated with the water outlet and provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline and used for sampling percolate of an outer discharge part. The spraying device is arranged above the simulation test box and can be used for simulating natural rainfall, so that simulation of natural solid waste accumulation sites is realized. The simulation experiment box is internally provided with at least one percolate collector which can be used for sampling percolate, and the percolate collectors are arranged along different heights, so that percolate at different depths of solid waste can be sampled.
Description
Technical Field
The invention belongs to the technical field of solid waste detection, and particularly relates to a solid waste leachate collection and experiment simulation system.
Background
Solid waste refers to environmentally-polluting solid, semi-solid waste materials produced in production, life, and other activities. From the viewpoint of its source, it may include construction waste, mining waste, household waste, agricultural waste, and the like. The solid waste has the characteristics of large quantity and complex components, and takes household garbage as an example, the household garbage comprises daily waste such as metal, plastic, paper and the like, waste materials such as kitchen garbage and the like which are rich in grease and organic substances, electronic products containing heavy metals and toxic substances, medicines and the like. The wastes have serious influence on the environment in the long-term stacking process, the generated gas pollutes the atmospheric environment, and the leachate formed after mixing rainwater pollutes soil and underground water in a large area.
In order to research the damage degree of solid waste, the prior art generally performs a simulation experiment of solid waste, and generally deposits the solid waste in an experimental container for simulation, for example, in the prior art, chinese patent document CN102941207A discloses a simulation system for the landfill process of municipal solid waste, in which a pressure applying device is arranged on the upper surface of a simulation tank for the landfill process, a leachate back-spraying system is arranged at the upper end of the simulation tank, and a leachate recycling tank is arranged at the lower end of the simulation tank. The upper end of the percolate return pipe is inserted into the percolate return spraying system, and the lower end of the percolate return pipe is inserted into the percolate recovery tank through a percolate return pump. The landfill process simulation tank is fixed in the thermostatic chamber through the sole support. The system is also provided with a methane alarm system connected with the gas flowmeter and the data acquisition integrated module. Therefore, the simulation of the landfill process is completed under the condition of controllable temperature.
Although the solid waste accumulation simulation experiment device in the prior art can realize simulation of solid waste in landfill, the simulation experiment device still has the problems that on one hand, the simulation device in the prior art can only realize detection of percolate parts discharged outside a filled field, but a means for sampling and simulating samples at different heights inside the filled simulation device is lacked, so that research on the arrangement rule of the percolate in the vertical direction is greatly limited. And the simulation experiment device in the prior art is carried out in the closed tank body, so that the material exchange between the solid waste and the external environment cannot be researched, and the simulation experiment of the influence of the solid waste on the environment is not facilitated.
Disclosure of Invention
The solid waste who solves among the prior art piles up simulation experiment device and lacks the means of sampling and simulating filling up the inside not co-altitude department sample of analogue means, and can't simulate the technical problem that solid waste tested to the influence of environment, and then provides one kind and can sample, be convenient for carry out the solid waste filtration liquid collection and the experiment analog system that study to solid waste other side border to the solid waste filtration liquid of different degree of depth department.
The technical scheme adopted by the application for solving the technical problems is as follows:
a solid waste leachate collection and experiment simulation system comprises: the simulation experiment box is provided with an opening at the top end, and anti-leakage layers are paved on the bottom surface and the side wall surface of the simulation experiment box; a water outlet is arranged on the bottom surface of the simulation experiment box, a drainage pipeline is communicated with the water outlet and is provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline; at least one percolate collector, wherein the percolate collector is arranged in the simulation experiment box; each percolate collector comprises a fixing shaft arranged along the horizontal direction, the fixing shaft is fixedly installed in the experiment simulation box, a plurality of hollow sampling cylinders are arranged on the fixing shaft, the sampling cylinders are arranged at intervals along the horizontal direction, each sampling cylinder is coaxially arranged with the fixing shaft, and a liquid inlet is formed in a partial area on the wall surface of each sampling cylinder; an outer cylinder is correspondingly arranged on the periphery of each sampling cylinder, the outer cylinder is arranged close to the outer wall surface of the sampling cylinder, and a window is arranged on the outer cylinder; a sleeve is further sleeved on the periphery of the fixed shaft and fixedly connected with the outer barrel, a rocker is fixedly arranged on the sleeve, the remote rod is shaken to be suitable for driving the outer barrel to rotate from a first position to a second position, a window of the outer barrel and a liquid inlet of the sampling barrel are arranged in a staggered mode at the first position, and the window of the outer barrel and the liquid inlet of the sampling barrel are arranged in a communicated mode at the second position; a water pumping channel is communicated with the interior of the sampling cylinder; and the spraying device is arranged above the simulation test box.
The plurality of percolate collectors are sequentially arranged along the vertical direction.
An isolation mechanism is arranged in the simulation experiment box, the isolation mechanism comprises a supporting cylinder which is coaxial with the simulation experiment box, and the wall surface of the supporting cylinder is of a mesh structure; an isolation cylinder is arranged on the wall surface close to the support cylinder, the isolation cylinder is detachably mounted in the simulation test box, and the percolate collector is positioned in the support cylinder.
A plurality of groups of fixed disks are arranged on a pair of oppositely arranged side walls of the supporting cylinder, two ends of the fixed shaft of each percolate collector are fixedly arranged on the group of fixed disks in a detachable mode, and the inner wall surface of the isolating cylinder is tightly attached to the outer wall surface of the supporting cylinder.
The simulation test box comprises a simulation test box, and is characterized in that a sealing cover is arranged above the simulation test box, the sealing cover is communicated with the inner space of the simulation test box, an exhaust pipeline is arranged on the sealing cover, an exhaust valve is arranged in the exhaust pipeline, and an air pressure detection device is arranged on the sealing cover.
Two hollow sampling barrels are arranged on each fixed shaft.
An outer cylinder is arranged on the periphery of each sampling cylinder.
Each sampling cylinder is provided with an independent water pumping channel.
And a percolate treatment device is communicated with the outlet of the sampling tank.
The leachate treatment device comprises a coagulation precipitation device, an activated carbon treatment device and a membrane treatment device which are sequentially connected.
The solid waste leachate collection and experiment simulation system has the advantages that:
(1) the solid waste leachate collection and experiment simulation system comprises a simulation experiment box, wherein an anti-leakage layer is paved on the bottom surface and the side wall surface of the simulation experiment box; the simulation experiment box comprises a simulation experiment box and is characterized in that a water outlet is formed in the bottom surface of the simulation experiment box, a drainage pipeline is communicated with the water outlet and provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline and used for sampling percolate of an outer discharge part. The spraying device is arranged above the simulation test box and can be used for simulating natural rainfall, so that simulation of natural solid waste accumulation sites is realized.
The invention is characterized in that at least one percolate collector is arranged in the simulation experiment box, and the percolate collector is used for sampling percolate through a hollow sampling cylinder arranged on a fixed shaft and an outer cylinder positioned outside the sampling cylinder. The sampling device comprises an outer cylinder, a remote rod, a window, a liquid inlet, a liquid outlet and a liquid outlet, wherein the outer cylinder can be driven to rotate by shaking the remote rod, when the outer cylinder is located at a first position, the window of the outer cylinder and the liquid inlet of the sampling cylinder are arranged in a staggered mode, and the liquid inlet is in a sealed state and isolated from the external environment; when the outer barrel is rotated to the second position again, the window of the outer barrel is communicated with the liquid inlet of the sampling barrel, the interior of the sampling barrel is communicated with the environment, the percolate in the solid waste enters the sampling barrel, and a water pumping pipe is communicated with the interior of the sampling barrel, so that the percolate can be pumped out, and sampling is completed. The percolate collectors are arranged along different heights, so that percolate at different depths of the solid waste can be sampled, and the research on microbial difference, pollutant content distribution rule and the like in percolate at different depths, such as deep and shallow surface layers, is facilitated.
(2) According to the solid waste leachate collection and experiment simulation system, an isolation mechanism is further arranged in the simulation experiment box, the isolation mechanism comprises a supporting cylinder which is coaxial with the simulation experiment box, and the wall surface of the supporting cylinder is of a mesh structure; an isolation cylinder is arranged on the wall surface close to the support cylinder, the isolation cylinder is detachably mounted in the simulation test box, and the percolate collector is positioned in the isolation cylinder. The supporting cylinder and the isolating cylinder are arranged, so that the simulation of the stacking boundary of the solid waste can be realized, when a simulation experiment is carried out, the isolating cylinder is firstly installed in the simulation experiment box, soil is placed in the outer space of the isolating cylinder, the solid waste is filled in the supporting cylinder, then the isolating cylinder is disassembled from the simulation experiment box, and at the moment, the solid waste is in contact with the outer soil, so that a solid waste-soil boundary is formed, and the solid waste-soil boundary can be used for researching the diffusion mechanism of percolate in the solid waste along the horizontal direction.
In order to make the technical scheme of the solid waste leachate collection and experimental simulation system of the present invention more clearly understood, the present invention is further described in detail below with reference to the specific drawings and specific examples.
Drawings
Fig. 1 is a schematic structural diagram of a simulation experiment box of the solid waste leachate collection and experiment simulation system according to the present invention;
FIG. 2 is a sectional view of a simulation experiment box of the solid waste leachate collection and experiment simulation system according to the present invention;
FIG. 3 shows a side view of the leachate collector of the present invention;
FIG. 4 is a sectional view of a simulation experiment box of the solid waste leachate collection and experiment simulation system with a supporting cylinder according to the present invention;
1-simulating an experimental box; 2-an isolation cylinder; 3-a support cylinder; 41-a first rocker; 42-a third rocker; 43-a second rocker; 44-a fourth rocker; 51-a window of the outer barrel; 52-outer cylinder; 521-an operation port; 53-a sampling cartridge; 54-a sealing layer; 55-a water pumping channel; 56-a water pumping pipe; 61-a first fixed disk; 62-a second fixed disk; 63-a third fixed disk; 64-a fourth fixed disk; 71-a first sleeve; 72-a third sleeve; 73-a second sleeve; 74-a fourth sleeve; 81-a first fixed shaft; 82-a second fixed shaft; 91-a screen layer; 92-a non-woven fabric layer; 1001-second cavity; 1002-first cavity.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the following embodiments, the term "outer side" in the direction refers to a side of the simulation experiment box located in the direction toward the central axis of the simulation experiment box as an inner side, and vice versa.
Example 1
The embodiment provides a solid waste leachate collection and experiment simulation system, as shown in fig. 1, including:
the simulation experiment box comprises a simulation experiment box 1, wherein the top end of the simulation experiment box 1 is arranged in an open manner, and the simulation experiment box 1 is a cylinder with a rectangular cross section in the embodiment; in this embodiment, the length of the cross section of the cylinder is 1.2 meters, the width is 1 meter, and the height is 1.2 meters, the bottom surface and the side wall surface of the simulation experiment box 1 are paved with an anti-leakage layer, and in this embodiment, the anti-leakage layer is a high-density polyethylene layer. The simulation experiment box 1 is characterized in that a water outlet (not shown in the figure) is arranged on the bottom surface of the simulation experiment box 1, a drainage pipeline is communicated with the water outlet and is provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline.
At least one percolate collector, wherein the percolate collector is arranged in the simulation experiment box 1; in this embodiment, the solid waste leachate collection and experimental simulation system is provided with two leachate collectors, and the two leachate collectors are a first leachate collector and a second leachate collector which are sequentially arranged along a vertical direction. Each percolate collector comprises a fixed shaft arranged along the horizontal direction, as shown in fig. 2, a first fixed shaft 81 of a first percolate collector is positioned right above a second fixed shaft 82 of a second percolate collector, and the diameters of the two fixed shafts are both 3 cm; the fixed shaft is fixedly installed in the experiment simulation box, in this embodiment, two ends of each fixed shaft are fixedly installed on a pair of side walls of the experiment simulation box, a plurality of hollow sampling cylinders 53 are arranged on each fixed shaft, specifically, in this embodiment, two hollow sampling cylinders 53 are arranged on each fixed shaft, the two sampling cylinders 53 are arranged at intervals along the horizontal direction, each sampling cylinder 53 is coaxially arranged with the fixed shaft, as a preferred embodiment, the sampling cylinders 53 are cylindrical cylinders in this embodiment, and as a further preferred embodiment, the sampling cylinders 53 are glass cylinders. The diameter of sampling cylinder 53 is greater than the diameter of fixed axle, is 6 cm. A liquid inlet is arranged on a partial area of the wall surface of each sampling cylinder 53; an outer cylinder 52 is correspondingly arranged on the periphery of each sampling cylinder 53, and the outer cylinder 52 is also a cylindrical cylinder; the outer cylinder 52 is arranged to be close to the outer wall surface of the sampling cylinder 53, and a window 51 is arranged on the outer cylinder 52, as a preferred embodiment, a filter screen is arranged on the window 51 for intercepting solid waste and preventing solid particles from entering the sampling cylinder 53 along with the solution, so that the problem of blockage is reduced; a sleeve is further sleeved on the periphery of the fixed shaft, in this embodiment, two sleeves are provided on each fixed shaft, the two sleeves are respectively sleeved on the fixed shaft outside the two sampling cartridges 53, as shown in the figure, a first sleeve 71 and a second sleeve 73 are provided on the first fixed shaft 81, a third sleeve 72 and a fourth sleeve 74 are provided on the second fixed shaft 82, and the two sleeves on each fixed shaft are coaxially provided with the fixed shaft. One end of each sleeve is fixedly connected with the outer cylinder 52 positioned on the inner side of the sleeve, the other end of each sleeve is fixedly provided with a rocker, and correspondingly, the first rocker 41, the second rocker 43, the third rocker 42 and the fourth rocker 44 are respectively and fixedly arranged on the first sleeve 71, the second sleeve 73, the third sleeve 72 and the fourth sleeve 74. The remote rod is shaken to drive the outer cylinder 52 fixedly connected with the remote rod to rotate from a first position to a second position, wherein at the first position, the window 51 of the outer cylinder 52 is arranged in a staggered manner with the liquid inlet of the sampling cylinder 53, and at the second position, the window 51 of the outer cylinder 52 is arranged in a communication manner with the liquid inlet of the sampling cylinder 53. In order to enhance the sealing performance, the sealing layer 54 is arranged between the sampling cylinder 53 and the outer cylinder 52, the sealing layer 54 is wrapped on the sampling cylinder 53 and is fixedly arranged relative to the sampling cylinder 53, the sealing layer 54 does not rotate along with the outer cylinder 52, and an opening is also arranged on the sealing layer 54 at the position corresponding to the liquid inlet. The sealing layer 54 is a polytetrafluoroethylene layer. Openings are also provided in the sealing layer 54 at locations corresponding to the inlet ports to facilitate the flow of liquid therethrough.
In the solid waste leachate collection and experiment simulation system of the present embodiment, a water pumping channel 55 is disposed on a cylindrical wall of each sampling cylinder 53, in this embodiment, each sampling cylinder 53 is a cylindrical cylinder whose axis is disposed along a horizontal direction, the water pumping channel 55 on the cylindrical wall of each sampling cylinder 53 is disposed on a circular side wall of the sampling cylinder 53, and correspondingly, an operation port 521 is disposed on the circular side wall of the outer cylinder 52, as shown in fig. 3, a water outlet end of the water pumping channel 55 penetrates through the operation port 521, when the sleeve drives the outer cylinder 52 to rotate, the water pumping channel 55 is adapted to rotate in the operation port 521 relative to the operation port 521, a water pumping pipe 56 is disposed in communication with the water pumping channel 55, and the water pumping pipe 56 extends from the inside of the sampling cylinder 53 to the outside of the simulation experiment box 1, thereby effecting withdrawal of the solution within cartridge 53.
In the solid waste leachate collection and experiment simulation system in this embodiment, a spraying device (not shown in the figure) is further installed above the simulation test box, the spraying device includes a spray head located above the simulation test box and a water supply pipeline connected with the spray head, a water supply pump is arranged on the water supply pipeline, and the spray head is uniformly arranged above the simulation test box in order to ensure the uniformity of water output of the spraying device.
The process of using the solid waste leachate collection and experiment simulation system to perform simulation experiments in the embodiment is as follows:
in an initial state, the outer cylinder 52 is at a first position relative to the sampling cylinder 53, at this time, the window 51 of the outer cylinder 52 is staggered with the liquid inlet of the sampling cylinder 53, and the liquid inlet on the sampling cylinder 53 is in a closed state; the solid waste which is crushed and uniformly stirred is placed in the simulation experiment box 1, the spraying device is started to simulate rainfall, the remote rod can be shaken during the experiment or after the experiment is finished to drive the outer cylinder 52 to a second position relative to the sampling cylinder 53, at the moment, the window 51 of the outer cylinder 52 is communicated with the liquid inlet of the sampling cylinder 53, the percolate enters the sampling cylinder 53 through the window 51 and the liquid inlet and is pumped out through the water pumping pipe 56, so that the percolate at different depths is sampled, and the percolate finally reaching the bottom layer is discharged through the water drainage pipe. After the experiment, can use deionized water to wash the inside of cartridge and in pumping channel, the pumping pipe to be convenient for carry out the experiment next time.
Example 2
The embodiment provides a solid waste leachate collection and experiment simulation system, as shown in fig. 4, including:
the simulation experiment box 1 is arranged in a way that the top end of the simulation experiment box 1 is open, and the simulation experiment box 1 is a cylinder with a square cross section in the embodiment; in this embodiment, the length of the cross section of the cylinder is 1.4 meters, the width is 1.4 meters, the height of the cylinder is 1.6 meters, the bottom surface and the side wall surface of the simulation experiment box 1 are paved with an anti-leakage layer, and the anti-leakage layer in this embodiment is a high-density polyethylene layer. A water outlet is arranged on the bottom surface of the simulation experiment box 1, a drainage pipeline is communicated with the water outlet and is provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline; in this embodiment, a filter screen layer 91 is further provided in the lower part of the cylinder in the cylinder, the filter screen layer 91 is provided so as to cover the cross section of the cylinder, a nonwoven fabric layer 92 is provided above the filter screen layer 91, and the height between the filter screen layer 91 and the bottom surface of the simulation test chamber 1 is 20 cm.
In this embodiment, an isolation mechanism is further disposed in the simulation experiment box 1, the isolation mechanism includes a supporting cylinder 3 disposed coaxially with the simulation experiment box 1, a lower end face of the supporting cylinder 3 is disposed on an upper surface of the non-woven fabric layer 92, in this embodiment, the supporting cylinder 3 is also a cylinder with a square cross section, the supporting cylinder 3 is disposed coaxially with a vertical axis of the experiment simulation box, in this embodiment, a cross section of an inner space of the supporting cylinder 3 has a length of 1.2 m and a width of 1.2 m, a height of the cylinder is about 1.4 m, and a wall surface of the supporting cylinder 3 is disposed in a mesh structure; the wall surface clinging to the supporting cylinder 3 is provided with an isolating cylinder 2, the height of the isolating cylinder 2 is the same as that of the supporting cylinder 3, the isolating cylinder 2 is detachably mounted in the simulation test box, as a preferred embodiment, the isolating cylinder 2 is sleeved on the outer wall of the supporting cylinder 3 through expansion force and can be extracted from the supporting cylinder 3, and the percolate collector is located in the supporting cylinder 3.
In this embodiment, the solid waste leachate collection and experiment simulation system further comprises at least one leachate collector, and the leachate collector is arranged in the simulation experiment box 1; in this embodiment, the solid waste leachate collection and experimental simulation system is provided with two leachate collectors, which are sequentially arranged in a vertical direction, namely a first leachate collector located above and a second leachate collector located below. Each percolate collector comprises a fixed shaft arranged along the horizontal direction, and the diameter of the fixed shaft is 3 cm; the fixed shafts of the two percolate collectors are arranged in parallel, the vertical projection of the fixed shafts of the two percolate collectors on the bottom surface of the simulation experiment box 1 is overlapped, namely the first percolate collector is positioned right above the second percolate collector, and the distance from the axis of the two percolate collectors to the inner wall surfaces of the supporting cylinders 3 positioned at the two sides of the first percolate collector is 60 cm. The fixed shaft is fixedly installed in the experiment simulation box, two ends of the fixed shaft are fixedly installed on a pair of side walls of the supporting cylinder 3 in the embodiment, two groups of fixed disks are arranged on a pair of side walls of the supporting cylinder 3 which are oppositely arranged, and as shown in the figure, the group of fixed disks positioned above the fixed shaft comprises a first fixed disk 61 and a second fixed disk 63; the group of fixed disks positioned below comprises a third fixed disk 62 and a fourth fixed disk 64; the two ends of the fixed shaft of each percolate collector are fixedly arranged on a group of fixed disks in a detachable mode, specifically, the two ends of the fixed shaft are fixedly arranged on the fixed disks through bolts, and the inner wall surface of the isolation cylinder 2 is tightly attached to the outer wall surface of the support cylinder 3.
Each of the fixing shafts is provided with a plurality of hollow sampling cartridges 53, specifically, each of the fixing shafts is provided with two hollow sampling cartridges 53, the two sampling cartridges 53 are arranged at intervals along the horizontal direction, each of the sampling cartridges 53 is coaxially arranged with the fixing shaft, as a preferred embodiment, in this embodiment, the sampling cartridges 53 are cylindrical barrels made of glass, the diameter of each of the sampling cartridges 53 is greater than that of the fixing shaft, and is 6cm, and the length of each of the sampling cartridges 53 along the axial direction is 15 cm. A liquid inlet is arranged on a partial area of the wall surface of each sampling cylinder 53; an outer cylinder 52 is correspondingly arranged on the periphery of each sampling cylinder 53, and the outer cylinder 52 is also a cylindrical cylinder; the outer cylinder 52 is arranged to be close to the outer wall surface of the sampling cylinder 53, and a window 51 is arranged on the outer cylinder 52, as a preferred embodiment, a filter screen is arranged on the window 51 for intercepting solid waste and preventing solid particles from entering the sampling cylinder 53 along with the solution, so that the problem of blockage is reduced; the periphery of fixed axle still is equipped with the sleeve, and every in this embodiment the filtration liquid collector is provided with two sleeves, two the sleeve suit respectively two the outside of sampling cylinder 53 on the fixed axle. As shown in the figures, a first sleeve 71 and a second sleeve 73 are provided on the first fixed shaft 81, a third sleeve 72 and a fourth sleeve 74 are provided on the second fixed shaft 82, and the two sleeves on each fixed shaft are coaxially arranged with the fixed shaft. One end of each sleeve is fixedly connected with the outer cylinder 52 positioned on the inner side of the sleeve, the other end of each sleeve is fixedly provided with a rocker, and correspondingly, the first rocker 41, the second rocker 43, the third rocker 42 and the fourth rocker 44 are respectively and fixedly arranged on the first sleeve 71, the second sleeve 73, the third sleeve 72 and the fourth sleeve 74. The remote rod is shaken to drive the outer cylinder 52 fixedly connected with the remote rod to rotate from a first position to a second position, wherein at the first position, the window 51 of the outer cylinder 52 is arranged in a staggered manner with the liquid inlet of the sampling cylinder 53, and at the second position, the window 51 of the outer cylinder 52 is arranged in a communication manner with the liquid inlet of the sampling cylinder 53. In order to enhance the sealing performance, a sealing layer 54 is arranged between the sampling cylinder 53 and the outer cylinder 52 in the embodiment, and the sealing layer 54 is a polytetrafluoroethylene layer. The sealing layer 54 is wrapped on the sampling cylinder 53 and is fixedly arranged relative to the sampling cylinder 53 and does not rotate along with the outer cylinder 52, and an opening is also arranged on the sealing layer 54 at a position corresponding to the liquid inlet. In the present embodiment, the distance between each sampling cylinder 53 and the inner wall surface of the support cylinder 3 closest to the sampling cylinder 53 in the axial direction is 20-30 cm.
In this embodiment, the cavity between the filter screen layer 91 and the bottom surface of the simulation experiment box 1 is separated into two cavities, namely a first cavity 1002 located at the center and a second cavity 1001 surrounding the first cavity 1002, wherein the first cavity 1002 is a rectangular cavity with a square cross section, four side walls of the first cavity 1002 are respectively arranged in parallel with four inner walls of the support cylinder 3 and coaxially arranged with the support cylinder 3, and the length and width of the rectangular cavity are both 60-80 cm. The first cavity 1002 can effectively sample percolate of solid waste, and interference of a soil interface on the percolate can be reduced. Liquid drainage pipelines are arranged on the bottom surfaces of the simulation experiment box 1 below the first cavity 1002 and the second cavity 1001, the liquid drainage pipeline communicated with the first cavity 1002 is a first liquid drainage pipeline, and a first sampling tank is communicated with a water outlet end of the first liquid drainage pipeline; the liquid discharge pipeline communicated with the second cavity 1001 is a second liquid discharge pipeline, and a second sampling tank is communicated with the water outlet end of the second liquid discharge pipeline.
In the solid waste leachate collection and experimental simulation system of the present embodiment, a water pumping channel 55 is disposed on the wall of each sampling cylinder 53, in this embodiment, each sampling cylinder 53 is a cylindrical cylinder whose axis is disposed along the horizontal direction, the water pumping channel 55 on the wall of each sampling cylinder 53 is disposed on the circular sidewall of the sampling cylinder 53, and correspondingly, an operation opening 521 is arranged on the cylindrical side wall of the outer cylinder 52, the water outlet end of the water pumping channel 55 is arranged through the operation opening 521, when the sleeve drives the outer cylinder 52 to rotate, the pumping channel 55 is adapted to rotate in the operation opening 521 relative to the operation opening 521, and a water pumping pipe 56 is communicated with the water pumping channel 55, and the water pumping pipe 56 extends from the inside of the sampling cylinder 53 to the outside of the simulation experiment box 1, so that the solution in the sampling cylinder 53 is extracted.
In the solid waste leachate collection and experiment simulation system in this embodiment, a spraying device and a sealing cover (not shown in the figure) are further installed above the simulation test box, wherein the spraying device includes a spray head located above the simulation test box, and a water supply pipeline connected with the spray head, and a water supply pump is arranged on the water supply pipeline. The sealing cover is communicated with the inner space of the simulation test box, an exhaust pipeline is arranged on the sealing cover, an exhaust valve is arranged in the exhaust pipeline, and an air pressure detection device is arranged on the sealing cover. Also as a preferred embodiment, a leachate treatment device is communicated with the outlets of the first sampling tank and the second sampling tank, and in this embodiment, the leachate treatment device includes a coagulation and precipitation device, an activated carbon treatment device, a filtering device and a membrane treatment device which are sequentially connected, wherein the coagulation and precipitation device adopts a coagulation and precipitation tank, and the coagulation and precipitation tank is provided with a dosing device for dosing a coagulant; the activated carbon treatment device adopts an activated carbon adsorption tank, and the ratio of the using amount of activated carbon particles in the activated carbon adsorption tank to the water inflow of the percolate is 6 g/L; the filter device adopts a vacuum filtration device which is provided with filter paper. The membrane treatment device adopts a reverse osmosis membrane treatment device. After the treatment by the treatment device, organic matters, chromaticity and metal ions in the leachate can be effectively removed, so that the leachate meets the discharge requirement.
The process of using the solid waste leachate collection and experiment simulation system to perform simulation experiments in the embodiment is as follows:
placing the crushed and uniformly stirred solid waste into the supporting cylinder 3, installing the isolating cylinder 2, placing soil between the outer wall of the isolating cylinder 2 and the inner wall of the simulation experiment box 1, placing the solid waste into the supporting cylinder 3, and then extracting the isolating cylinder 2 to enable the solid waste to be in contact with the soil, wherein in an initial state, the outer cylinder 52 is at a first position relative to the sampling cylinder 53, at the moment, the window 51 of the outer cylinder 52 and the liquid inlet of the sampling cylinder 53 are arranged in a staggered manner, and the liquid inlet on the sampling cylinder 53 is in a closed state; starting a spraying device to simulate rainfall, shaking the remote lever during or after the experiment to drive the outer cylinder 52 to a second position relative to the sampling cylinder 53, wherein the window 51 of the outer cylinder 52 is communicated with the liquid inlet of the sampling cylinder 53, and the percolate enters the sampling cylinder 53 through the window 51 and the liquid inlet and is pumped out through the water pumping pipeline 56, so that the percolate at different depths is sampled, and finally the percolate reaching the bottom layer is discharged through a water drainage pipeline; after the experiment is finished, the soil sample can be sampled, and the infiltration condition of the percolate in the soil is researched.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.
Claims (10)
1. The utility model provides a solid waste leachate collection and experiment simulation system which characterized in that includes:
the simulation experiment box is provided with an opening at the top end, and anti-leakage layers are paved on the bottom surface and the side wall surface of the simulation experiment box; a water outlet is arranged on the bottom surface of the simulation experiment box, a drainage pipeline is communicated with the water outlet and is provided with a valve, and a sampling tank is communicated with the water outlet end of the drainage pipeline;
at least one percolate collector, wherein the percolate collector is arranged in the simulation experiment box; each percolate collector comprises a fixing shaft arranged along the horizontal direction, the fixing shaft is fixedly installed in the experiment simulation box, a plurality of hollow sampling cylinders are arranged on the fixing shaft, the sampling cylinders are arranged at intervals along the horizontal direction, each sampling cylinder is coaxially arranged with the fixing shaft, and a liquid inlet is formed in a partial area on the wall surface of each sampling cylinder; an outer cylinder is correspondingly arranged on the periphery of each sampling cylinder, the outer cylinder is arranged close to the outer wall surface of the sampling cylinder, and a window is arranged on the outer cylinder; a sleeve is further sleeved on the periphery of the fixed shaft and fixedly connected with the outer barrel, a rocker is fixedly arranged on the sleeve, the remote rod is shaken to be suitable for driving the outer barrel to rotate from a first position to a second position, a window of the outer barrel and a liquid inlet of the sampling barrel are arranged in a staggered mode at the first position, and the window of the outer barrel and the liquid inlet of the sampling barrel are arranged in a communicated mode at the second position; a water pumping channel is communicated with the interior of the sampling cylinder;
and the spraying device is arranged above the simulation test box.
2. The solid waste leachate collection and experimental simulation system of claim 1, wherein said plurality of leachate collectors are arranged in series along a vertical direction.
3. The solid waste leachate collection and experimental simulation system of claim 2, wherein an isolation mechanism is disposed in the simulation experiment box, the isolation mechanism comprises a supporting cylinder disposed coaxially with the simulation experiment box, and a wall surface of the supporting cylinder is disposed in a mesh structure; an isolation cylinder is arranged on the wall surface close to the support cylinder, the isolation cylinder is detachably mounted in the simulation test box, and the percolate collector is positioned in the support cylinder.
4. The solid waste leachate collection and experimental simulation system of claim 3, wherein a plurality of sets of fixed disks are disposed on a pair of oppositely disposed sidewalls of the support cylinder, two ends of the fixed shaft of each leachate collector are fixedly mounted on a set of fixed disks in a detachable manner, and the inner wall surface of the isolation cylinder is closely attached to the outer wall surface of the support cylinder.
5. The solid waste leachate collection and experimental simulation system of any one of claims 1 to 4, wherein a sealing hood is disposed above the simulation test chamber, the sealing hood is in communication with the internal space of the simulation test chamber, an exhaust duct is disposed on the sealing hood, an exhaust valve is disposed in the exhaust duct, and an air pressure detecting device is disposed on the sealing hood.
6. The solid waste leachate collection and experimental simulation system of claim 5 wherein two hollow sampling cartridges are provided on each of said stationary shafts.
7. The solid waste leachate collection and experimental simulation system of claim 6, wherein an outer cylinder is disposed around each sampling cylinder.
8. The solid waste leachate collection and experimental simulation system of claim 7 wherein each of said sampling cartridges is provided with an independent water pumping channel.
9. The solid waste leachate collection and experimental simulation system of claim 8, wherein a leachate treatment device is disposed in communication with the outlet of the sampling tank.
10. The solid waste leachate collection and experimental simulation system of claim 8, wherein the leachate treatment device comprises a coagulation and precipitation device, an activated carbon treatment device and a membrane treatment device which are sequentially connected.
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Application publication date: 20200204 |