CN213275261U - Toxicity diffusion leaching analysis device for solid waste materials - Google Patents
Toxicity diffusion leaching analysis device for solid waste materials Download PDFInfo
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- CN213275261U CN213275261U CN202022074752.6U CN202022074752U CN213275261U CN 213275261 U CN213275261 U CN 213275261U CN 202022074752 U CN202022074752 U CN 202022074752U CN 213275261 U CN213275261 U CN 213275261U
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- 238000002386 leaching Methods 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000009792 diffusion process Methods 0.000 title claims abstract description 21
- 239000002910 solid waste Substances 0.000 title claims abstract description 16
- 230000001988 toxicity Effects 0.000 title abstract description 7
- 231100000419 toxicity Toxicity 0.000 title abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 37
- 229920003023 plastic Polymers 0.000 claims abstract description 37
- 239000004746 geotextile Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 231100000331 toxic Toxicity 0.000 claims description 2
- 230000002588 toxic effect Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 13
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Abstract
The analysis device for the toxicity diffusion leaching of the solid waste materials comprises a leaching container, a faucet, a cover and a bracket, wherein the cover is arranged on an opening at the top of the leaching container, a water inlet is formed in the upper part of the leaching container, and the faucet is arranged at the lower part of the leaching container; the support comprises a plastic ring I, a plastic ring II, a threaded pillar, a screw cap and a geotextile screen, the support is arranged in the center of the inside of the leaching container, the plastic ring I and the plastic ring II are matched in an annular mode, the geotextile screen paved between the two plastic rings is fixed in a push-type sealing mode, and the screw cap is used for fixing and adjusting the position of the geotextile screen. The utility model is suitable for researching the diffusion leaching influence in the whole material and the particle material; equipment development is simple, and the test is relatively easy to implement; different samples are convenient to operate in experiments, and the cross contamination of the samples can be reduced by replacing the soil cloth screen.
Description
Technical Field
The utility model relates to an analytical equipment that solid waste material toxicity diffusion leached.
Background
Renewable solid waste materials, which mainly include many material by-products from the industry (power plant ash, metal-containing slag, foundry sand), mineral extraction (porcelain clay sand, coal mine spoil, slate waste), construction (brick, concrete) and incineration (municipal solid waste incinerator ash, sewage sludge incinerator ash), may be suitable for use as a substitute for natural aggregates in road construction and bulk fill. Most of the materials contain pollutants such as heavy metals and soluble salts, and the endogenous pollutants can be leached and migrated into soil and underground water when the materials are soaked and leached by rainwater or other exogenous water. The release of these endogenous contaminants depends primarily on the constitutive nature and history of the material used, the amount of leached contaminants is preferably dependent on several factors,
water is one of the most important transport media for contaminants. Contaminants can be transported within a fluid by three different methods: convection, diffusion and diffusion. Where diffusion is the net movement of a contaminant across a concentration gradient resulting from the tendency of the fluid to equilibrate in concentration.
In the aspect of chemical pollutant component leaching characteristic analysis of solid materials, a certain leaching test is generally adopted for evaluation, and how to modify a test method enables the materials under different physical forms to be comprehensively considered (such as real grading, compaction and combination), the influence generated by leaching under different working conditions (liquid-solid ratio, leaching agent type and the like) is considered, and the problem of obtaining the information of the long-term leaching behavior and characteristic properties of the materials still needs to be considered.
Disclosure of Invention
In order to overcome the defects of the existing leaching evaluation device and means, the utility model provides a toxicity diffusion leaching analysis device for solid waste materials, which is suitable for researching the diffusion leaching influence of the whole material and the granular material; the equipment development is simple, and the test operation is relatively easy to implement; different samples are convenient to operate in experiments, and the cross contamination of the samples can be reduced by replacing the soil cloth screen.
The utility model provides a technical scheme that its technical problem adopted is:
a toxicity diffusion leaching analysis device for solid waste materials comprises a leaching container, a water outlet faucet, a cover and a bracket, wherein the cover is arranged on an opening at the top of the leaching container, a water inlet is formed in the upper part of the leaching container, and the water outlet faucet is arranged at the lower part of the leaching container; the support comprises a plastic ring I, a plastic ring II, a threaded pillar, a screw cap and a geotextile screen, the support is arranged in the center of the inside of the leaching container, the plastic ring I and the plastic ring II are matched in an annular mode, the geotextile screen paved between the two plastic rings is fixed in a push-type sealing mode, and the screw cap is used for fixing and adjusting the position of the geotextile screen.
Furthermore, the plastic ring is uniformly distributed with six threaded holes with the aperture being the diameter of the support, and the plastic ring for locking the geotextile screen is horizontally and fixedly supported on the six threaded supports by the threaded engagement of the screw cap and the threaded supports.
The technical conception of the utility model is as follows: a cylinder with a slight cone is selected as a leaching container to carry out groove experiment research on the diffusion leaching rule in the solid waste material, so that the material is equidistant to any wall of the container, and the problem of local accumulation of the material can be prevented; the bracket supports solid waste materials in the leaching agent, wherein the position of the solid waste materials can be determined by adjusting a screw cap, so that a sample is kept vertically and centrally in the leaching agent, the solid waste materials with real gradation, compaction, combination and the like are placed on the geotextile screen of the bracket, and the diffusion leaching influence of the solid waste materials in different physical forms is researched; samples can be taken from the top and the bottom of the leaching container, and the influence of segregation in the leaching container on the diffusion of pollutants is researched; the leaching container, the bracket and other instruments which are to be contacted with the leaching agent or the material sample are all made of polyethylene with better chemical stability, so that the influence of diffusion leaching of pollutants can be researched, the influence of the leaching agent on the research of the pollutant leaching of solid waste materials under the adsorption action can be changed, and the pollution interference of the instruments can be reduced.
The beneficial effects of the utility model are that: the method is suitable for researching the diffusion leaching influence in the whole material and the particle material; equipment development is simple, and the test is relatively easy to implement; different samples are convenient to operate in experiments, and the cross contamination of the samples can be reduced by replacing the soil cloth screen.
Drawings
FIG. 1 is a schematic structural diagram of a toxicity diffusion leaching analysis device for solid waste materials.
Figure 2 is a schematic representation of a geotextile screen.
Fig. 3 is a schematic view of a stent.
Wherein: 1. a threaded post; 2. a nut; 3. a plastic ring I; 4. a geotextile screen; 5. a plastic ring II; 6. a leaching vessel; 7. a water inlet; 8. a cover; 9. and (4) a water outlet faucet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, the toxic diffusion leaching analysis device for solid waste materials comprises a leaching container 6, a water outlet tap 9, a cover 8 and a bracket, wherein the cover 8 is arranged at the top opening of the leaching container 6, a water inlet is arranged at the upper part of the leaching container 6, and the water outlet tap is arranged at the lower part of the leaching container 6; the support comprises a plastic ring I3, a plastic ring II 5, a threaded pillar 1, a screw cap 2 and a geotextile screen 4, the support is arranged in the center of the inside of a leaching container 6, the plastic ring I3 and the plastic ring II 5 are matched in a ring shape, the geotextile screen 4 laid between the two plastic rings is pushed, sealed and fixed, the plastic rings are uniformly distributed with six threaded holes with the aperture being the diameter of the pillar, and the plastic ring I3 and the plastic ring II 5 for locking the geotextile screen 4 are horizontally and fixedly supported on the six threaded pillars 1 through the threaded engagement of the screw cap 2 and the threaded pillar 1; the position of the geotextile screen 4 is fixed and adjusted by the screw cap 2.
The device was mainly studied for leaching of inorganic components. The leaching container 6 is suitable for testing all solid materials under different liquid-solid ratios (L/S) required in leaching tests of different types of grooves, and capacity scale marks are calibrated on the leaching container, so that the test is facilitated; during the experiment, the top of the leaching container is covered with a cover, and a closed space is kept; a drum type water outlet tap 9 is arranged on the side surface near the bottom of the leaching container 6, so that the liquid in the container can be conveniently sampled;
the support is composed of two plastic rings I3 and II 5 which are interlocked with each other, six pillars 1, six screw caps 2 and a geotextile screen 4, the support is placed in the center of the interior of a leaching container 6 during an experiment, the plastic rings I3 and II 5 are clamped with each other, the fine geotextile screen 4 fixed in the rings is fixed, six threaded holes with the aperture being the diameter of the pillars are uniformly distributed in the plastic rings, and the plastic rings locking the geotextile screen are horizontally and fixedly supported on the six pillars 1 with the threads by the screw caps through threaded engagement; the size of the mesh of the geotextile screen is 2mm, the screw cap 2 fixes and adjusts the position of the geotextile screen 4, so that a sample can be stably placed on the geotextile screen 4, liquid can freely circulate around the sample, and a material sample needs to be surrounded by the leachate; when the samples are replaced for leaching experiments, the geotextile screen 4 can be replaced so as to reduce the cross contamination among the samples;
further, the height of the geotextile screen is determined by adjusting the screw cap 2 to adapt to different volumes of liquid required by the experimental range, so as to ensure that the material sample is vertically centered in the leachate and is located on the geotextile screen to keep the equal distance between the bottom of the leaching container and the surface of the leachate;
further, a leaching agent is introduced from a water inlet 7, after a target amount is reached, the material is placed on the geotextile screen 4 on the support, the support is placed in the leaching container 6, the cover 8 is covered to prevent external interference, liquid is collected through the water faucet 9, and the collected liquid is used as a sample to analyze the leaching content of the pollutants in the sample so as to confirm the change of the concentration of the pollutants in the tank;
preferably, the leaching vessel 6 is selected as a cylinder with a slight taper, preventing the problem of particulate material falling through the geotextile mesh support and accumulating in the corners of a rectangular leaching vessel, and since the compacted sample will be cylindrical in shape, a cylindrical vessel will have the material sample in the centre of the leach solution equidistant from the vessel walls; the slightly tapered design of the strip allows for stacking when not in use.
Furthermore, the leaching container device is made of a low-pressure food-grade high-density polyethylene material with good chemical stability, and the hardness, tensile strength and creep property of the leaching container device are superior to those of low-density polyethylene. The wear resistance, the electrical insulation, the toughness and the cold resistance are good, the chemical stability is good, the paint is not dissolved in any organic solvent under the condition of room temperature, and is resistant to corrosion of acid, alkali and various salts, the pollution interference of instruments is reduced, the paint belongs to an environment-friendly material, and the paint can be recycled after being heated to a melting point; the drum-type water outlet faucet 9, the support column 1, the plastic ring I3 and the plastic ring II 5 are made of polyethylene materials, and the polyethylene has the advantages of good chemical stability, general mechanical property, low tensile strength, poor creep resistance and good impact resistance, and can meet the experimental requirements.
The working process of the embodiment is as follows: the height of the geotextile screen 1 is changed by adjusting the screw cap 2 according to the volume of the leaching agent required by the experiment, so that the material sample is ensured to be vertically centered in the leaching agent. And fully cleaning the leaching container 6, the plastic ring I3, the plastic ring II 5, the threaded strut 1, the screw cap 2, the geotextile screen 4 and the threaded strut 1 by using a leaching agent. Aggregate samples in different physical forms (such as real grading, compaction and combination) can be respectively placed on the geotextile screen 4 on the bracket for experiment, a certain amount of leaching agent is added through the water inlet 7, the bracket is gently placed in the central position in the leaching container 1, the cover 8 is covered to prevent external interference, bottom liquid is collected through the outlet of the drum-type water outlet faucet 9, leachate surface liquid is collected to confirm any change of pollutant concentration in the tank, the experiment duration and the leachate sampling frequency are adjusted according to the nature of the material to be tested to reach the balance condition, and then the experiment is completed.
According to the above, the utility model has the advantages of reasonable design, simple equipment development and relatively easy implementation of the experiment, and the diffusion leaching experiment under different liquid-solid ratios, different pH values and different leaching liquid conditions can be researched through the height-adjustable bracket; the diffusion leaching rules of materials in different physical forms can be researched by placing aggregates with real grading, compaction and combination conditions on a cloth screen; the extraction vessel, holder and other instruments intended to be in contact with the extraction agent or material sample are made of polypropylene, which reduces contamination interference with the instrument.
Claims (2)
1. The device is characterized by comprising a leaching container, a water outlet faucet, a cover and a bracket, wherein the cover is arranged at the top opening of the leaching container, a water inlet is formed in the upper part of the leaching container, and the water outlet faucet is arranged at the lower part of the leaching container; the support comprises a plastic ring I, a plastic ring II, a threaded pillar, a screw cap and a geotextile screen, the support is arranged in the center of the inside of the leaching container, the plastic ring I and the plastic ring II are matched in an annular mode, the geotextile screen paved between the two plastic rings is fixed in a push-type sealing mode, and the screw cap is used for fixing and adjusting the position of the geotextile screen.
2. The apparatus for analyzing toxic diffusion leaching of solid waste material according to claim 1, wherein: six threaded holes with the diameter of the support column are uniformly distributed on the plastic ring, and the plastic ring for locking the geotextile screen is horizontally and fixedly supported on the six threaded support columns through threaded engagement of the screw cap and the threaded support columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022074752.6U CN213275261U (en) | 2020-09-21 | 2020-09-21 | Toxicity diffusion leaching analysis device for solid waste materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022074752.6U CN213275261U (en) | 2020-09-21 | 2020-09-21 | Toxicity diffusion leaching analysis device for solid waste materials |
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| CN213275261U true CN213275261U (en) | 2021-05-25 |
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| CN202022074752.6U Active CN213275261U (en) | 2020-09-21 | 2020-09-21 | Toxicity diffusion leaching analysis device for solid waste materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323880A (en) * | 2021-12-23 | 2022-04-12 | 生态环境部华南环境科学研究所 | Leaching device for toxicity samples of solid wastes with different particles |
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2020
- 2020-09-21 CN CN202022074752.6U patent/CN213275261U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323880A (en) * | 2021-12-23 | 2022-04-12 | 生态环境部华南环境科学研究所 | Leaching device for toxicity samples of solid wastes with different particles |
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