CN110618006A - Water-force characteristic test sample preparation and harmful gas reduction efficiency test device - Google Patents

Water-force characteristic test sample preparation and harmful gas reduction efficiency test device Download PDF

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Publication number
CN110618006A
CN110618006A CN201910975417.2A CN201910975417A CN110618006A CN 110618006 A CN110618006 A CN 110618006A CN 201910975417 A CN201910975417 A CN 201910975417A CN 110618006 A CN110618006 A CN 110618006A
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gas
sample
water
function
test
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CN110618006B (en
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孙文静
李明玉
孔溢
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials

Abstract

The invention discloses a water-force characteristic test sample preparation and harmful gas reduction efficiency test device. The device comprises a compressed air source, an air storage tank, a gas flowmeter, a stop valve, a safety valve and a simulation air source. The compressed air source is connected in parallel with a gas flowmeter A through a gas storage tank and a plurality of stop valves A and is connected with 6 first function test rooms and n-1 second function test rooms; the bottom parts of the first function test room and the n-1 second function test rooms are respectively provided with interfaces which are connected in parallel through n stop valves B and then are communicated with a simulation gas source through a stop valve C, the left sides of the first function test room and the n-1 second function test rooms are respectively provided with interfaces which are connected with a safety valve through a gas flowmeter B, and the top parts of the n-1 second function test rooms are respectively provided with an interface which is connected with a stop valve D. The device has simple and convenient design, flexible operation and good integrity, and can provide help for the research of the water-force characteristic aging test sample preparation and the landfill gas reduction aging test of the overlying soil body of the landfill.

Description

Water-force characteristic test sample preparation and harmful gas reduction efficiency test device
Technical Field
The invention relates to a water-force characteristic timeliness test sample and a harmful gas reduction timeliness test device, which can be applied to soil body water-force characteristic timeliness research and harmful gas reduction timeliness research in geotechnical engineering.
Background
In China, sanitary landfill of household garbage is still the mainstream mode for treating the household garbage, however, a large amount of toxic and harmful gas released during the service period of a garbage landfill, such as methane, can cause greenhouse effect, hydrogen sulfide has foul odor and the like, and brings a great deal of adverse effects to the society, and the garbage problem is increasingly becoming a prominent problem influencing urban living quality and environmental protection, and needs to be solved urgently.
The service life of the refuse landfill is longer, the environment of the overburden soil is severe in the service life, but the requirement on the performance of the landfill is not lowered, so that a plurality of modified soil overburden materials are provided, such as compost mixtures, yard garbage mixtures, mineralized garbage and mineralized sludge mixtures and the like. The traditional clay covering layer can enhance the oxidizing capability of gas, but the physical and mechanical properties of the covering layer material can change along with time, so that the water-force characteristics of the soil body of the covering layer are changed, and the service life of the refuse landfill is greatly shortened. Therefore, research on long-term water-power characteristics and landfill gas oxidation efficiency of the overlying soil is needed.
At present, short-term tests are mostly carried out on the water-force characteristics of the soil body of the overburden layer of the refuse landfill and the adsorption and biological oxidation tests of the overburden layer on harmful landfill gas, namely, the physicochemical properties of the soil body of the overburden layer are assumed to be stable, and the change of the soil body of the overburden layer along with the time is less considered. In reality, with the advance of the service period of the landfill and the influence of the external environment, the change of the physical and chemical properties (such as density, pH value, pore structure, surface functional group and the like) of the soil body of the overburden layer is dynamic, and the function of the soil body of the overburden layer is reduced due to the dynamic change, so that the wrong estimation of the design parameters of the soil body of the overburden layer is caused. Therefore, it is necessary to develop a water-force characteristic aging test sample and a methane reduction aging test device to research the water-force characteristic and the mechanism of the change of the oxidizing efficiency of the overburden soil to the harmful gas along with the time, so as to obtain more complete aging research results of the hydraulic parameters of the overburden soil and the oxidizing efficiency of the landfill gas.
The water-force characteristic aging test sample preparation and harmful gas reduction aging test device can be used for preparing soil samples for long-term research on water-force characteristics and providing soil samples for researching water-force characteristics of conventional saturated soil and unsaturated soil; and the research on the absorption and oxidation timeliness of different modified soil samples on the landfill gas can be carried out, so that the landfill gas reduction rule during the service period of the landfill is obtained.
Disclosure of Invention
The invention provides a water-force characteristic test sample preparation and harmful gas reduction efficiency test device aiming at the characteristics of long service time, high landfill gas danger coefficient and the like of a refuse landfill, and provides a soil sample for researching the water-force characteristic of an overburden soil body under a long-acting mechanism on the basis of the lack of long-term continuous research of the existing research, so that the soil samples at different time nodes during the service period of the landfill are obtained, and a research basis is provided for continuously researching the change of the mechanical property of the overburden soil body. And the device can measure the adsorption quantity and the oxidation efficiency of the overburden layer of the refuse landfill to the landfill gas at different time nodes to obtain indexes of the soil adsorption and the oxidation of the overburden layer of the refuse landfill gas at different time nodes. The instrument device has simple design, flexible operation and good integrity, and can continuously research the water-force performance and landfill gas reduction efficiency of the soil body of the overburden layer of the landfill.
In order to achieve the aim of the invention, the conception of the invention is as follows:
the device comprises sample chambers with two functions, wherein the sample chamber with the first function is at least provided with 6 small sample cylinders, and each small sample cylinder can be used for placing soil samples with different working conditions and preparing samples for physical-chemical index tests and adsorption characteristic tests for different inflation durations; and the second functional sample chamber is used for placing a soil sample under the same working condition, gas is introduced into the bottom of the second functional sample chamber, and the oxidation efficiency of the gas is tested at different time intervals. The number of each functional sample chamber can be set according to the requirement, and all the sample chambers are connected in series to supply gas in a centralized way.
According to the inventive concept, the invention adopts the following technical scheme:
a water-power characteristic test sample and a harmful gas reduction efficiency test device. The device comprises a compressed air source, an air storage tank, a gas flowmeter, stop valves, a safety valve and a simulation air source, wherein the compressed air source is connected in parallel with the gas flowmeter A through the air storage tank and the gas flowmeter A and is connected with 6 first-function test rooms and n-1 second-function test rooms through the stop valves A; the bottom parts of the first function test room and the n-1 second function test rooms are respectively provided with interfaces which are connected in parallel through n stop valves B and then are communicated with a simulation gas source through a stop valve C, the left sides of the first function test room and the n-1 second function test rooms are respectively provided with interfaces which are connected with a safety valve through a gas flowmeter B, and the top parts of the n-1 second function test rooms are respectively provided with an interface which is connected with a stop valve D.
The device for testing the water-force characteristic sample preparation and the harmful gas reduction efficiency comprises two functional sample chambers, wherein the functional sample chamber comprises an outer bracket, a base with a concave groove, a sample chamber containing at least 6 small cylinders and a gas collection cavity with a gas hole at the bottom. The lower part of the outer support is an aluminum alloy bottom plate, the middle part of the bottom plate is a base with a concave spiral groove, two threaded vertical rods are embedded on two sides of the bottom plate, the upper part of the bottom plate is an aluminum alloy top plate, bolt holes are formed in two sides of the top plate to enable the top plate to be connected with the vertical rods of the bottom plate, and the height of the top plate is adjusted by adjusting the positions of nuts on the threaded vertical rods; the sample chamber with the 6 small cylinders is an acrylic plastic plate, and sample chambers with different diameters are arranged in the middle of the sample chamber; the gas collecting cavity with the gas collecting hole at the bottom is an acrylic plastic cavity, and the left side and the right side of the cavity are provided with a gas inlet and a gas collecting port;
the second functional sample chamber comprises an outer support, a base with a concave groove, a sample chamber and a gas collecting cavity with a gas hole at the bottom. The lower part of the outer support is an aluminum alloy bottom plate, the middle part of the bottom plate is a base with a concave spiral groove, two threaded vertical rods are embedded on two sides of the bottom plate, the upper part of the bottom plate is an aluminum alloy top plate, bolt holes are formed in two sides of the top plate, so that the aluminum alloy bottom plate can be connected with the vertical rods of the bottom plate, and the height of the top plate is adjusted through the threaded vertical rods; the sample chamber is an acrylic plastic transparent cylinder, and an O-shaped ring is arranged at the joint of the upper and lower bottom plates to ensure the tightness of the sample chamber;
the left sides of the air cavities at the tops of the first function sample chamber and the second function sample chamber are provided with guide and discharge ports, and a safety valve and a pressure gauge are arranged; the right side sets up the air inlet, provides the air through air compressor, installs the gaseous flow of steerable inlet end of gas flowmeter. Set up the sample connection at the top of air cavity, the sample connection adopts butyl rubber stopper shutoff, and butyl rubber stopper has self sealss function, can conveniently take a sample many times and carry out gas detection.
The outer support consists of a circular aluminum alloy bottom plate, a screw, an annular aluminum alloy top plate and a nut; four screw rods are arranged on the periphery of the bottom aluminum alloy plate, a groove is arranged in the middle of the bottom aluminum alloy plate, the size of the groove is the same as the outer diameter of the sample chamber, and the sample chamber is ensured to be just embedded into the groove. The top ring body is provided with screw holes, and the screw holes correspond to the screw rods one to one, so that the upper plate and the lower plate are connected, and the purpose of fixing the sample chamber and the air cavity is achieved.
The base with the concave groove and the side wall are made of acrylic plastic plates. The diameter of the groove base in the first functional sample chamber is the same as that of the sample chamber; the depth of the groove base of the second functional sample chamber can be embedded into the permeable stone.
The side walls of the round sample cavity with the first function and the top air cavity are provided with grooves, so that an O-shaped ring can be conveniently installed, and when the sample cavity is inserted into the base, the side walls can be sealed without air leakage; the two-function sample chamber only needs to arrange an O-shaped ring on the side wall of the air cavity at the top of the sample, so that the side wall is connected in a sealing manner, and gas is conveniently collected.
Compared with the prior art, the invention has the following obvious substantive characteristics and obvious advantages:
1. aiming at the experimental research on the water-force characteristic of the overburden layer of the refuse landfill and the oxidation efficiency of the landfill gas, the invention provides a set of test device for testing the oxidation landfill gas of the overburden layer soil body of the landfill, and is favorable for the timeliness test of the reduction of the overburden landfill gas.
2. The functional sample chamber in the experimental device can be used for preparing samples for testing the hydraulic mechanics research of the overburden soil of the municipal refuse landfill, and the water-force characteristics of the overburden soil under different inflation time periods can be researched by inflating the device for different time periods and taking out the samples in one small cylinder at intervals for tests of penetration, compression, strength and the like.
3. The testing device has the greatest innovation point that the testing device can be used for testing the timeliness, and can continuously research the oxidation efficiency of the overburden gas and the change rule of the water-force characteristic of the soil body of the refuse landfill by setting different inflation durations, so that the testing device accords with the research of the real engineering on the landfill.
The experimental device can achieve various purposes and realize the research on the oxidizing efficiency of the landfill gas and the timeliness of the hydraulic mechanics of the overlying soil body. The experimental device sample preparation method and the preparation process are simple, the preparation material is easy to obtain, and the operation is simple and convenient. The gas is supplied in a centralized manner in a series connection mode, so that the test conditions are kept consistent in the long-term test process.
Drawings
FIG. 1 is a schematic view showing the overall structure of the test apparatus of the present invention.
FIG. 2 is a schematic diagram of the functional sample chamber of the test apparatus of the present invention.
FIG. 3 is a schematic view showing the structure of a functional secondary sample chamber of the test apparatus of the present invention.
FIG. 4 is a plan view of an aluminum alloy base plate of an external bracket of the test device of the present invention.
FIG. 5 is a cross-sectional view of an aluminum alloy base plate of an external bracket of the test device of the present invention.
FIG. 6 is a plan view of an aluminum alloy ring-shaped top plate of an external bracket of the test device of the invention.
Figure 7 is a plan view of a sample chamber that is a functional part of the test device of the present invention.
FIG. 8 is a sectional view of a functional sample chamber of the test apparatus of the present invention.
FIG. 9(a) is a schematic diagram of the structure of the air cavity of the test device of the present invention; FIG. 9(b) is a cross-sectional view of the air chamber 1-1 of the test device of the present invention.
Detailed Description
The invention is further described in detail below with reference to the accompanying drawings and preferred embodiments:
the first embodiment is as follows:
referring to fig. 1 ~ and fig. 9, the device for testing the water-force characteristic test sample preparation and the harmful gas reduction efficiency comprises a compressed air source A, an air storage tank B, a gas flowmeter C, a stop valve D, a safety valve E and a simulation air source F, and is characterized in that the compressed air source A passes through the air storage tank B and the gas flowmeter A C1Connected in parallel through a plurality of stop valves A D1Connecting 6 first functional laboratories I and n-1 second functional laboratories II-n; the bottoms of the first functional test room I and the n-1 second functional test rooms II-n are provided with interfaces which respectively pass through n stop valves ethylene D2Connected in parallel and then passes through a stop valve C3The simulation gas source F is connected, and the left sides of the simulation gas source F and the simulation gas source F are respectively provided with a port through which gas passesFlowmeter second C2The tops of two functional test rooms II-n connected to a safety valve E and n-1 are respectively connected with a stop valve D through interfaces4
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the first function laboratory and the second function laboratory comprise an outer support, a base, a first function laboratory, a second function laboratory and an air cavity. The outer bracket comprises round aluminum alloy bottom plates 2 and 21, threaded screw rods 4 and 23, annular aluminum alloy top plates 8 and 26 and nuts 9 and 27; the circular aluminum alloy bottom plates 2 and 21 and the annular aluminum alloy top plates 8 and 26 are respectively provided with four bolt holes at the periphery thereof, and the bolt holes of the bottom plates and the bolt holes of the top plates are in one-to-one correspondence; the screws 4 and 23 are full-thread screws and are fixed in screw holes of the circular aluminum alloy bottom plates 2 and 21, and the height of the annular top plate is adjusted by changing the nuts 9 and 27.
The base comprises bases 3 and 22 with spiral grooves at the bottom and side walls 15 and 32. The bottom plate and the side wall are made of transparent high-pressure-resistant acrylic plastic plates, and the bottom plate and the side wall are bonded by acrylic glue. On the side wall plates 15 and 32, scale bars 5 and 24 are mounted to control the height of the sample pressed, thereby controlling the dry density of the sample. And also observe the deformation of the sample during the inflation process.
The first functional sample chamber 17 comprises six small sample cylinders 19, sealing silicone grease 16 on the inner walls of the cylinders, an upper permeable stone 14, a lower permeable stone 18 and two O-shaped rings 6. Two O-rings 6 are arranged at the upper part and the lower part of the sample chamber, so that the O-rings are tightly combined with the side wall 15 of the base, and the side leakage of gas is avoided.
The second functional sample chamber 34 comprises a sample chamber inner wall sealing silicone grease 35, a sample upper permeable stone 33 and a lower permeable stone 36.
The air chambers 11 and 29 include left air dispersing ports 7 and 25, upper sampling ports 10 and 28, right compressed air inlets 12 and 30, butyl rubber stoppers 40, and O-rings 13 and 31. The air cavity is made of high-pressure-resistant acrylic plastic, and the bottom of the air cavity is provided with densely distributed small holes so that the permeating gas can be conveniently counted into the air cavity through the sample. The side wall O-rings 13 and 31 have the function of preventing gas side leakage.
During the test, the bracket nuts 9 and 27 are unscrewed, the upper annular aluminum alloy top plates 8 and 26 and the air chambers 11 and 29 are removed, the sample chambers 17 and 34 are horizontally placed on the base spiral groove bottom plates 3 and 22, and the upper and lower O-rings 6 of the sample chambers are ensured to be tightly contacted with the base side walls 15 and 32. The lower permeable stones 18 and 36 are respectively placed at the bottom of the small cylinder of the sample chamber 17 and the bottom of the sample chamber 34, before filling the soil sample, the inner wall of the sample chamber is coated with sealing silicone grease 16 and 35 in advance, and then the soil sample is filled in layers. During sample preparation, a compaction hammer is used for compacting a pre-prepared soil sample to a preset height, and the height of the compacted sample is observed through the graduated scales 5 and 24 on the side walls 15 and 32 of the base, so that whether the sample reaches a preset dry density or not is controlled. Finally, the permeable stones 14 and 33 are placed on the small cylinder of the sample chamber 17 and the top of the sample chamber 34. After sample preparation is completed, the surface of the sample chamber is cleaned and placed in the air cavities 11 and 29, and the O-rings 13 and 31 on the side wall of the air cavity are required to be tightly contacted with the side wall of the base. A pressure gauge and a safety valve with higher precision are arranged at the left side bleeding ports of the air cavities 11 and 29 to prevent the pressure in the air cavities from being overloaded; the right sides of the air cavities 11 and 29 are compressed air inlets, and air flows out of an air compressor and enters the air cavities 11 and 29 through an air storage tank, a humidifier, a pressure gauge and a pressure regulating valve in sequence; the upper parts of the air cavities 11 and 29 are provided with sampling ports, the sampling ports are sealed by butyl rubber plugs 40, and the butyl rubber plugs 40 have a self-sealing function, so that sampling at each time is facilitated. After the sample chambers 17 and 34 and the air chambers 11 and 29 are installed, respectively, annular aluminum alloy top plates 8 and 26 are placed on the upper portions of the air chambers 11 and 29 through the screws 4 and 23, and then nuts 9 and 27 are installed and tightened so as to be in close contact with the air chambers 11 and 29. The whole experimental device adopts a series connection mode to intensively supply equivalent gas at the bottom gas inlets 1 and 20, different inflation durations of 4 months, 8 months, 12 months, 16 months, 20 months, 24 months and the like are set, and research is carried out on the oxidation efficiency of the overburden soil body of the refuse landfill to the landfill gas and the water-force characteristic of the soil body under the action of a long-acting mechanism.
Experimental example 1:
the water-force characteristic aging test sample preparation test is carried out, and part I in the structural schematic diagram of figure 1 is started.
The first step is as follows: on placing the workstation with bottom plate 2, the base 3 of taking the concave groove is placed on bottom plate 2, and four threaded screw rods 4 correspond respectively and install on screw 38, place permeable stone 18 down on base 3, guarantee that the permeable stone just in time imbeds the concave groove top of base.
The second step is that: after the lower permeable stone 18 is installed on the base, the acrylic plastic side wall 15 is placed above the lower permeable stone, then the sample chamber 17 with a plurality of small sample cylinders 19 is installed in the side wall 15, and the O-shaped sealing rings 6 are installed at the upper part and the lower part of the sample chamber 17 to ensure that the side wall 15 and the sample chamber 17 are sealed. A scale 5 is mounted on the side wall of the sample cylinder 17 to observe the change in the height of the sample.
The third step: the inner wall of the small sample tube 19 is coated with a sealing silicone grease 16 in order to ensure that gas can pass through the sample. The prepared soil sample is poured from the upper part of the sample chamber 17 into the small sample cylinder 19 in a layered mode, and the compactness of the prepared sample can be controlled by observing the reading of the graduated scale 5 in the period. And finally, the upper part of the sample is provided with a permeable stone 14, and the upper surface of the permeable stone is ensured to be flush with the upper surface of the sample chamber 17 by adjusting the thickness of the permeable stone.
The fourth step: an air cavity 11 is arranged at the upper part of the sample chamber 17, the bottom of the air cavity is provided with a small hole 41, the left side of the air cavity 11 is provided with a bleeding hole 7, a gas flowmeter C and a safety valve E are arranged, and a screwed valve D is arranged on the right air inlet pipe and is communicated with a compressed air source A. And an O-shaped sealing ring 13 is arranged on the side wall of the air cavity 11 at the same time of installing the air cavity, so that the collected air is prevented from leaking.
The fifth step: an annular aluminum alloy top plate 8 is arranged at the top of the air cavity 11, the screw holes of the top plate are inserted into the threaded screw rods 4 in a one-to-one correspondence mode, the annular top plate and the air cavity are tightly pressed to be provided with screw rod nuts 9, and the nuts 9 are appropriately screwed to enable the air cavity to be in tight contact with the sample chamber 17.
And a sixth step: the air inlet 1 on the base 3 is connected with an air source F through a valve D, and other devices II-n in the figure 1 are closed, so that the device I is ensured to be in a working state. And (3) introducing a simulation air source F at the bottom and introducing compressed air A at the upper part according to a certain air inlet rate, stopping air inlet after the test conditions are met, and closing the air inlet and the air outlet. Soil samples can be taken from a small sample cylinder 19 at regular intervals of test periods (4 months, 8 months, 12 months, 16 months, 20 months and 24 months) to perform a water-force characteristic test.
Experimental example 2:
and (3) carrying out a test for reducing the timeliness of harmful gas on the upper cladding of the refuse landfill, and starting parts II-n in the structural schematic diagram of the figure 1.
The first step is as follows: the bottom plate 21 is placed on the workbench, the base 22 with the concave groove is placed on the bottom plate 21, the four threaded screw rods 23 are correspondingly installed on the screw holes 38 respectively, the lower permeable stone 36 is placed on the base 2, and the permeable stone is guaranteed to be just embedded into the upper portion of the concave groove of the base.
The second step is that: after the lower porous stone 36 is mounted on the base, the sample chamber 34 is placed above the lower porous stone, and the inner wall of the sample chamber 34 is coated with a sealing silicone grease 35. A scale 24 is mounted on the side wall of the sample chamber 34 for observing changes in the height of the sample and indirectly controlling the degree of compaction of the sample.
The third step: the inner wall of the sample chamber 34 is coated with a sealing silicone grease 35 to prevent gas from passing through the sidewall between the soil sample and the sample chamber. The prepared soil sample is poured into the sample chamber 34 from the upper part of the sample chamber layer uniformly, the scraping treatment is carried out between the soil sample layers, and the compactness of the sample can be controlled by observing the reading of the graduated scale 24 in the sample loading process. Finally, a permeable stone 33 is installed above the sample.
The fourth step: the air cavity 29 is arranged at the upper part of the sample chamber 34 filled with the sample, the bottom of the air cavity is provided with a small hole 41, the left side of the air cavity 29 is provided with a bleeding hole 25 and is provided with a gas flowmeter C and a safety valve E, the right air inlet pipe is provided with a screwing valve D and is communicated with a compressed air source A, the upper part of the air cavity 29 is provided with a gas sampling port 28, and the sampling port is blocked by a butyl rubber plug 40, so that multiple sampling is convenient. And an O-shaped sealing ring 31 is arranged on the side wall of the air cavity 29 at the same time of installing the air cavity, so that the air is prevented from leaking.
The fifth step: an annular aluminum alloy top plate 26 is arranged at the top of the air cavity 29, the screw holes of the top plate are inserted into the threaded screw rods 23 in a one-to-one correspondence mode, the annular top plate and the air cavity are tightly pressed to be provided with screw rod nuts 27, and the nuts 27 are appropriately screwed to enable the air cavity to be tightly contacted with the sample chamber 34.
And a sixth step: the air inlet 20 on the base 22 is connected to the air source F through the valve D and the device i in fig. 1 is closed to ensure that the devices ii-n are in operation. And (3) introducing a simulation air source F at the bottom and introducing compressed air A at the upper part according to a certain air inlet rate, stopping air inlet after the test conditions are met, and closing the air inlet and the air outlet. After stopping air intake for 60min, taking gas samples from the top sampling port 28 by using a 1ml glass syringe according to 2h, 4h and 8h …. (or every 6h), testing the gas components and content by using a gas chromatograph, taking parallel samples three times each time, and carrying out the harmful gas reduction timeliness test.

Claims (5)

1. The utility model provides a water-power characteristic test is equipped with appearance and harmful gas and cuts down efficiency test device, includes compressed air source (A), gas holder (B), gas flowmeter (C), stop valve (D), relief valve (E) and simulation air supply (F), its characterized in that: the compressed air source (A) passes through the air storage tank (B) and the gas flowmeter (C)1) Connected in parallel through a plurality of stop valves A (D)1) Connecting 6 function one laboratories (I) and n-1 function two laboratories (II-n); the bottoms of the first function laboratory (I) and the n-1 second function laboratories (II-n) are provided with interfaces which pass through n stop valves B (D) respectively2) Connected in parallel and then passes through a stop valve C (D)3) The analog gas sources (F) are connected, and the left sides of the analog gas sources (F) are respectively provided with a port through a gas flowmeter B (C)2) Is connected to a safety valve (E), and the tops of n-1 functional secondary laboratories (II-n) are respectively connected with a stop valve D4)。
2. The apparatus for testing water-power characteristics of a sample and reducing harmful gas according to claim 1, wherein: the first function laboratory (I) and the second function laboratory (II-n) have the same shell structure and comprise outer supports and bases; the outer support comprises circular aluminum alloy bottom plates (2) and (21), screws (4) and (23), annular aluminum alloy top plates (8) and (26) and nuts (9) and (27); the circular aluminum alloy bottom plates (2) and (21) and the annular aluminum alloy top plates (8) and (26) are respectively provided with four bolt holes at the periphery thereof, and the bolt holes of the bottom plates and the bolt holes of the top plates are in one-to-one correspondence; the screws (4) and (23) are all-thread screws and are fixed in screw holes of the circular aluminum alloy bottom plates (2) and (21), and the height of the annular top plate is adjusted by changing the nuts (9) and (27).
3. The device for testing the water-force characteristic sample preparation and the harmful gas reduction efficiency as claimed in claim 2, wherein the base comprises bases (3) and (22) with spiral grooves at the bottom and side walls (15) and (32), the base and the side walls are made of transparent high-pressure-resistant acrylic plastic plates, and the base and the side walls are bonded by acrylic glue; scales (5) and (24) are arranged on the side wall plates (15) and (32), the sample pressing height is controlled, so that the dry density of the sample is controlled, and the deformation of the sample in the inflation process can be observed.
4. The water-force characteristics test sample preparation and harmful gas reduction efficacy test device according to claim 3, wherein said functional-sample chamber (17) comprises six small sample cartridges (19) having inner wall sealing silicone grease (16), upper permeable stone (14), lower permeable stone (18), two O-rings (6); two O-shaped rings (6) are arranged at the upper part and the lower part of the sample chamber, so that the O-shaped rings are tightly combined with the side wall (15) of the base, and the gas side leakage is avoided; the function two sample chamber (34) comprises a sample chamber inner wall sealing silicone grease (35), a sample upper permeable stone (33) and a lower permeable stone (36).
5. The water-force characteristic test sample preparation and harmful gas abatement performance testing device according to claim 4, wherein the air chambers (11) and (29) comprise left side gas emission ports (7) and (25), upper sampling ports (10) and (25), right side compressed air inlets (12) and (30), butyl rubber plugs (40), O-shaped rings (13) and (31), the air chambers are made of high pressure resistant acrylic plastic, densely distributed small holes are arranged at the bottom of the air chambers, so that the permeated gas is counted into the air chambers through the samples, and the side wall O-shaped rings (13) and (31) have the function of preventing the gas from side leakage.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111610309A (en) * 2020-05-07 2020-09-01 上海大学 Device for testing gas adsorption capacity and oxidation efficiency of soil body with controllable soil body external load

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