CN109283299A - A kind of Dynamic Leaching system and method - Google Patents
A kind of Dynamic Leaching system and method Download PDFInfo
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- CN109283299A CN109283299A CN201811377758.1A CN201811377758A CN109283299A CN 109283299 A CN109283299 A CN 109283299A CN 201811377758 A CN201811377758 A CN 201811377758A CN 109283299 A CN109283299 A CN 109283299A
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Abstract
The invention discloses a kind of Dynamic Leaching systems, container including containing solvent, metering pump, conveyance conduit, at least two column shape containers, the spray head of leaching solvent is sprayed into each column shape container, collection vessel and rain gauge, one end of transfer pipeline and the reservoir, metering pump is provided close to the transfer pipeline of one end, the other end of conveyance conduit is equipped at least two bifurcated bypass lines, every bifurcated bypass line is connected to a spray head, a column shape container is equipped with below each spray head, a rain gauge is equipped in one of column shape container cavity, other column shape containers are for filling sample to be leached and being equipped with water outlet in bottom wall, and filter is equipped with above bottom wall, resulting leachate is flowed into the collection vessel by water outlet.Also disclose a kind of Dynamic Leaching method.Dynamic Leaching system structure of the invention is simple, is able to achieve simulation site environment carries out toxicity Dynamic Leaching to solid wastes such as flying dusts, and method is easy to operate, widely used, and simulation effect is good.
Description
Technical field
The present invention relates to solid waste to leach analysis field more particularly to a kind of Dynamic Leaching system and method.
Background technique
In recent years, Municipal Solid Waste in China is with annual 8% speed increase, and China has become in the world that rubbish burden is most
One of the country of weight.The method that China generallys use burning handles domestic waste, and rubbish can be made after waste incineration
Volume reduce 90%, weight reduce 70%, effectively reduce dumping occupied area.But in incineration process of domestic garbage
There is a large amount of flying dust (account for about total amount of burning away the refuse 3%~5%) generation, flying dust is to utilize system in flue gas purification system and recuperation of heat
Residue obtained from being collected in system, the little particle ash that mainly burned air and flue gas are blown afloat, not sufficiently combusted carbon
Equal combustibles, salt and heavy metal for volatilizing due to high temperature etc. condense again during cooling and purifying or occur to chemically react and produce
Raw substance, due in flying dust except containing it is a certain amount of it is uncombusted stain outer, also contain a certain amount of dioxin, heavy metal etc.
High toxic material is classified as hazardous waste by National Hazard waste register, must first pass through before carrying out final disposal to it solid
Change/stabilization processes.Primary work is exactly to assess flying dust to human health and environment in flying dust management (as disposed or utilizing)
Gap, investigate in flying dust various pollutants matter, especially heavy metal to the potential risk of underground water.
There are many solid waste such as flying dust leaching toxicity test method at present, these methods can assess pollutant in environment
In potential leachability, but the conclusion of significant difference may be obtained using different methods.Currently, common problem
Have because field condition and environment are influenced by weather, laboratory carry out leaching experiment after, due to laboratory leaching environment with
The difference of site environment causes laboratory result and the practical leaching index at scene not to be consistent, it is difficult to Gu control scene stabilisation/
Change quality.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide that a kind of structure is simple, is able to achieve mould
Quasi- site environment carries out the Dynamic Leaching system of toxicity Dynamic Leaching to solid wastes such as flying dusts, also provides a kind of easy to operate, purposes
Extensively, it is able to achieve the Dynamic Leaching method that simulation site environment carries out toxicity Dynamic Leaching to solid wastes such as flying dusts.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of Dynamic Leaching system, including the container for containing leaching solvent, metering pump, conveyance conduit, at least two columns
Container, spray head, collection vessel and the rain gauge that leaching solvent is sprayed into each column shape container, one end of the transfer pipeline and institute
Reservoir is stated, metering pump is provided close on the transfer pipeline of one end, and the other end of the conveyance conduit is equipped at least two
Bifurcated bypass line, every bifurcated bypass line are connected to a spray head, and a column shape container is equipped with below each spray head,
In be equipped with a rain gauge in column shape container cavity, other column shape containers are for filling sample to be leached and being equipped in bottom wall
Water outlet, and filter is equipped with above the bottom wall, leaching solvent resulting leachate after leaching sample to be leached passes through out
The mouth of a river flows into the collection vessel.
Above-mentioned Dynamic Leaching system, it is preferable that further include timer, sensor, the meter are had on the timer
When device be set on the bifurcated bypass line or conveyance conduit.
Above-mentioned Dynamic Leaching system, it is preferable that in the column shape container filled with sample to be leached, in sample to be leached
Filter paper, gauze or geotextiles are equipped with above product.
Above-mentioned Dynamic Leaching system, it is preferable that the other end of the conveyance conduit seals, the conveyance conduit in
At least two bifurcated bypass lines being connected to the conveyance conduit are equipped with close to the position of the other end.
Above-mentioned Dynamic Leaching system, it is preferable that be equipped on the filter with a thickness of 1~4cm, partial size is 1~2cm
Quartz sand layer.
Above-mentioned Dynamic Leaching system, it is preferable that the material of the column shape container is organic glass；The mistake of the filter
Filter opening diameter is 10~20 μm.
The inventive concept total as one also provides a kind of Dynamic Leaching method, includes the following steps:
S1, leaching solvent, and the interior placement rain gauge into a column shape container are modulated according to local practical rainfall water quality, toward other
Column shape container in fill sample to be leached；
S2, starting metering pump, leaching solvent are conveyed and is synchronized are sprayed on sample and rain gauge to be leached；
S3, precipitation measured by rain gauge is adjusted into metering pump compared with target rainfall, and according to target rainfall
Flow；
S4, the collection leachate of collection vessel is taken in real time and carries out constituent analysis as needed.
Above-mentioned Dynamic Leaching method, it is preferable that further include inquiring local history before starting metering pump in the S2
Rainfall parameter, and set according to target rainfall the flow value of metering pump.
Above-mentioned Dynamic Leaching method, it is preferable that the others column shape container includes at least one.
Above-mentioned Dynamic Leaching method, it is preferable that the sample to be leached is incineration of refuse flyash, dregs of incinerator, rubbish
Or other solid waste.
System and method of the invention can be applied to the toxicity Dynamic Leaching experiment of incineration of refuse flyash, can be by this hair
Bright system, method realize that simulation site environment carries out the experiment of sample toxicity Dynamic Leaching, laboratory grasp light rain, moderate rain,
Sample toxicity Dynamic Leaching index in the case where heavy rain.System and method of the invention can also be used for the toxicity dynamic of other solid wastes
Leaching experiment.
Compared with the prior art, the advantages of the present invention are as follows:
1, Dynamic Leaching system equipment of the invention composition is simple, easy to operate, passes through setting metering pump and rainfall gauge control leaching
Solvent flux realizes simulated environment (light rain, moderate rain, heavy rain) out, and by rainfall gauge come Real-time Feedback precipitation, Neng Goushi
Simulation site environment (light rain, moderate rain, heavy rain) now is carried out to flying dust and carries out the experiment of sample toxicity Dynamic Leaching, can efficiently grasp mould
Intend the toxicity Dynamic Leaching index of sample in light rain, moderate rain, all kinds of situations of heavy rain, the leaching feelings under very close actual conditions
Condition, it is widely applicable, it is of very high actual application value.Moreover it is possible to extend for such as dregs of incinerator, rubbish or other solids
The simulation of waste is leached.
2, Dynamic Leaching system of the invention carries out real-time timing, energy to the sprinkling of leaching solvent by addition timer
It realizes the control to test period, convenient for testing the record of overall process, while continuing out after pause can be tested under special circumstances
Exhibition test, guarantees the continuity of data.
3, Dynamic Leaching system of the invention can improve cloth liquid by being laid with filter paper or filter cloth etc. on sample to be leached
Uniformity improves the uniformity of leaching, can effectively improve the precision for leaching result.
4, Dynamic Leaching system of the invention is equipped with thickness by setting filter on column shape container bottom wall, and in filter
The quartz sand layer that degree is 1~4cm, partial size is 1~2cm can effectively prevent sample to be leached across filter and enter collection vessel
In, improve the accuracy of Dynamic Leaching result.
5, Dynamic Leaching method of the invention is easy to operate, modulates leaching solvent according to the water quality of local practical rainfall, leads to
Metering pump control leaching solvent feed flow is crossed, according to rain gauge reading and target precipitation real-time monitoring during Dynamic Leaching
The flow simulation real time environment of metering pump can simulate the pollutant release rule under unsaturation leaching condition using Dynamic Leaching method
Rule can effectively grasp the toxicity Dynamic Leaching index of sample in simulation light rain, moderate rain, all kinds of situations of heavy rain.
Detailed description of the invention
Fig. 1 is Dynamic Leaching system schematic of the invention.
It is respectively identified in figure are as follows:
1, container；2, metering pump；3, conveyance conduit；4, timer；5, column shape container；6, spray head；7, collection vessel；8, rainfall
Device；9, sample to be leached；10, filter.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
Embodiment 1
A kind of Dynamic Leaching system of the invention is able to achieve simulation site environment and carries out toxicity dynamic leaching to incineration of refuse flyash
Out, as shown in Figure 1, including for containing 4, two container 1 of leaching solvent, metering pump 2, conveyance conduit 3, timer specification phases
Column shape container 5 together, the spray head 6(for respectively corresponding the sprinkling leaching liquor into two column shape containers 5 are sprayed into each column shape container 5
Spill the spray head 6 of leaching solvent), collection vessel 7 and rain gauge 8, one end (first end) of conveyance conduit 3 and the container that solvent is housed
1 solvent outlet connects (connection), is solvent delivery outlet, and be equipped with close to the conveyance conduit 3 of 1 one end of container for conveying leaching
The metering pump 2 of solvent out, the other end (second end) seal, in the other end (second end) close to conveyance conduit 3 on conveyance conduit 3
Position be equipped with two bifurcated bypass lines for being connected to conveyance conduit 3, every bifurcated bypass line is connected to a spray head 6,
And each 6 specification of spray head is identical, a column shape container 5 is equipped with below each spray head 6, and set in 5 cavity of one of column shape container
There is a rain gauge 8, another column shape container 5 is described for filling the column of sample 9 to be leached for filling sample 9 to be leached
The bottom wall of shape container 5, which is equipped with above water outlet and bottom wall, is equipped with filter 10, and wherein water outlet can be one or more, leachate
It is flowed into collection vessel 7 through filter 10, and by water outlet.Specifically, outlet conduit is equipped with below 5 bottom wall of column shape container,
One end of outlet conduit is connected to the water outlet of column shape container 5, and the other end extends in collection vessel 7, and leachate passes through water outlet
Pipeline is flowed into collection vessel 7 and is collected.
In the present solution, leaching solvent is modulated by Simulated Acid Rain water quality, is stored in container 1 when carrying out Dynamic Leaching,
It is arranged by the control of metering pump 2 to liquid measure, is recorded by timer 4 to the liquid time.When leaching, make in the power of metering pump 2
Under, leaching solvent is exported from container 1, passes sequentially through conveyance conduit 3 and two bifurcated bypass lines, and by with each bifurcated branch
The spray head 6 of road pipeline connection uniformly sprays to leaching solvent in each column shape container 5, and one of spray head 6 is uniform by leaching solvent
It is sprayed on sample 9 to be leached, leaching solvent permeates in sample 9 to be leached down under the effect of gravity, leaches sample to be leached
Toxicant in product 9, the outlet pipe that resulting leachate slow transits through 5 bottom of column shape container flow into the collection vessel 7 of lower section,
Leachate is collected by collection vessel 7, leaching solvent is uniformly sprayed to the column shape container 5 equipped with rain gauge 8 by another spray head 6
In, the precipitation of simulation is grasped by rain gauge 8, precipitation and target precipitation (i.e. the wanted mould measured by rain gauge 8
Quasi- precipitation event) regulate and control the flow of metering pump 2, to simulate the spray precipitation of heavy rain, moderate rain or light rain.So on the one hand
On the other hand the precipitation event of analog heavy rain, moderate rain or light rain can take the leachate analysis leachate in collection vessel 7 simultaneously
Ingredient obtain the real-time Dynamic Leaching situation of sample.
This programme can also be extended for carrying out toxicity Dynamic Leaching to dregs of incinerator, rubbish or other solid waste.
In the present embodiment, filter 10 at least covers the corresponding opening of outlet pipe, to prevent the sample in leaching process
It is flowed into collection vessel 7 with leachate.
In the present embodiment, it is preferable that the water outlet is located at 5 bottom wall of the column shape container center.
In the present embodiment, bifurcated bypass line is equipped with timer 4, has sensor on timer 4, sensor can detect
It is flowed through to liquid, and transmits signals to the controller of timer, timer 4 is started by controller and realizes timing, realizes timing
The self-clocking of device 4.
In the present embodiment, in the column shape container 5 filled with sample 9 to be leached, one layer of filter is equipped on sample 9 to be leached
Paper, for guaranteeing leaching liquor water distribution uniformity, so that the leaching liquid being sprayed onto column shape container 5 is evenly distributed on filter paper, with into one
Step so that leaching liquid to the leaching of sample 9 to be leached more evenly.Gauze or geotextiles substitution can also be used in filter paper, but due to filter paper ratio
More typically and because of the particularity of its material, effect is more preferable, preferably uses filter paper herein.
In the present embodiment, pad is equipped with a thickness of 2cm on filter 10, and partial size is the quartz sand layer of 1~2cm, is used for into one
Step prevents sample 9 to be leached to be lost into collection vessel 7.
In the present embodiment, in the present embodiment, spray head 6 is set to the surface of column shape container 5, and collection vessel 7 is set to and is filled with
The underface of the column shape container 5 of sample 9 to be leached.
In the present embodiment, one end that bifurcated bypass line is connected to spray head 6 is lower than the other end being connected to conveyance conduit 3
(lower section for being located at conveyance conduit 3)；The lower end of every bifurcated passage is connected to spray head 6.
In the present embodiment, filter 10 is that aperture is 10~20 μm, and the present embodiment uses the steel wire upper berth of aperture 0.5cm
One middling speed quantitative filter paper (thickness 0.2mm, quality 80g/m2, 10~20 μm of aperture), in addition it is also possible to use aperture for 10~
20 μm of filter plate, non-woven fabrics or filter membrane or other filter elements, collection vessel 7 can be triangular flask or other containers.
In the present embodiment, the anti-leaching solvent corrosion of the material of column shape container 5, can be organic glass or other anti-can be leached
The material of solvent corrosion prevents leaching solvent from the substance dissolution in column shape container 5 is entered leachate, and result is leached in interference.
In the present embodiment, the thickness of sample 9 to be leached can determine according to actual needs, in the present embodiment with a thickness of
36cm；Sample 9 to be leached is incineration of refuse flyash.The leaching sample 9 of the present embodiment extend also to dregs of incinerator, rubbish or
Other solid waste.
In the present embodiment, column shape container 5 is diameter 32cm, high 50cm, and lucite tube with a scale, pipe upper end are opened
Mouthful, filter 10 is arranged in tube bottom in bottom closing, and the outlet pipe of diameter 2cm is stayed in centre.The present embodiment metering pump 2 is controlled
System water inlet flow velocity, by the way of continuous leaching round the clock, water outlet is accepted with collection vessel 7, container closure.When spray, leach molten
Agent enters in sample 9 to be leached, and obtained leachate is through the quartz sand layer and filter 10 on filter 10, then through outlet pipe stream
Enter in collection vessel 7.
Embodiment 2
A kind of Dynamic Leaching method of the invention, is leached using system as described in Figure 1, is included the following steps:
(1) according to the water quality of local practical rainfall in 1 internal modulation leaching solvent of container；And into a column shape container 5 filling to
It leaches sample 9 and forms filled layer, side rim consolidates when filling sample, the interior placement rain gauge 8 into another column shape container 5.
(2) start metering pump 2, leaching solvent is delivered to two spray heads 6 and uniformly sprinkling is leached into two column shape containers 5
Solvent keeps leaching solvent synchronous and uniformly drenches on sample 9 to be leached and rain gauge 8；Specifically, it will be leached for metering pump 2 molten
Agent is delivered to each bifurcated bypass line through conveyance conduit 3, and each spray head 6 through being connected to each bifurcated bypass line is sprayed on each column
In container 5, sprinkling situation of each spray head 6, including sprinkling flow etc., that is, control the leaching being sprayed in each column shape container 5
Out consistent (such as spray rate, flow and the uniformity) the case where solvent.
(3) precipitation measured by rain gauge 8 is read, and by target rainfall compared with the resulting precipitation of rain gauge 8,
The parameter of metering pump 2 is adjusted according to target rainfall.
(4) the collection leachate for taking collection vessel 7 in real time by the data of timer 4 as needed, to collection leachate
Ingredient is analyzed, and leaches data to obtain real-time pollutant.
The Dynamic Leaching method of the present embodiment further includes inquiring local history before starting metering pump 2 in step (2)
Rainfall parameter such as hour precipitation, intra day ward, (target rainfall) sets the flow of metering pump 2 according to actual needs.
The Dynamic Leaching method of the present embodiment further includes inquiring local history before starting metering pump 2 in step (2)
Which rainfall parameter is rainfall parameter (inquire), and the flow of metering pump 2 is set according to target rainfall.
The Dynamic Leaching method of the present embodiment, other column shape containers 5 be include at least one.
The Dynamic Leaching method of the present embodiment, sample 9 to be leached are incineration of refuse flyash.In addition it is also possible to for burning
The leaching of clinker, rubbish or other solid waste.
The Dynamic Leaching method of the present embodiment, the leaching solvent leach the resulting leachate of sample 9 to be leached and successively pass through
Quartz layer, filter 10 and water outlet enter collection vessel 7.
The experimental method that the present embodiment uses packed column to leach, basic step are to modulate to leach by Simulated Acid Rain water quality
Solvent is stored in dedicated container 1, is used for sample 9 to be leached filling to form filled layer in the column shape container 5 of leaching test,
Setting confluent is controlled by metering pump 2, the water supply time is recorded by timer 4, water is uniformly sprayed at wait soak by spray head 6
Sample 9 and rain gauge 8(pass through the precipitation that rain gauge 8 grasps simulation simultaneously out), check that rain gauge 8 analyzes precipitation and basis
Target precipitation adjusts the flow of metering pump 2, collects leachate by collection vessel 7, leaching solvent is logical with the flow velocity controlled
Cross 9 filled layer of sample to be leached and form leachate, then take its groups of contaminants of leachate analysis in different time periods at.
Dynamic Leaching method is used through this embodiment, can be discharged with pollutant of the analog sample under unsaturation leaching condition
Rule.
Although the present invention is disclosed as above with preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (10)
1. a kind of Dynamic Leaching system, which is characterized in that including the container (1), metering pump (2), defeated for containing leaching solvent
Send pipeline (3), at least two column shape containers (5), to spray head (6), the collection vessel of sprinkling leaching solvent in each column shape container (5)
(7) it is connected to rain gauge (8), one end of the transfer pipeline (3) with the container (1), metering pump (2) is provided close to container
(1) on the transfer pipeline (3) of one end, the other end of the conveyance conduit (3) is equipped at least two bifurcated bypass lines, and every is divided
Fork bypass line is connected to a spray head (6), and a column shape container (5) is equipped with below each spray head (6), and one of column is held
A rain gauge (8) is equipped in device (5) cavity, other column shape containers (5) are for filling sample to be leached (9) and being equipped in bottom wall
Water outlet, and filter (10) are equipped with above the bottom wall, leaching solvent resulting leachate after leaching sample (9) to be leached
It is flowed into the collection vessel (7) by water outlet.
2. Dynamic Leaching system as described in claim 1, which is characterized in that it further include timer (4), the timer (4)
Upper to have sensor, the timer (4) is set on the bifurcated bypass line or conveyance conduit (3).
3. Dynamic Leaching system as described in claim 1, which is characterized in that the column filled with sample to be leached (9)
In container (5), filter paper, gauze or geotextiles are equipped with above sample to be leached (9).
4. Dynamic Leaching system as claimed in any one of claims 1 to 3, which is characterized in that the conveyance conduit (3) it is described
Other end sealing, the conveyance conduit (3) are equipped at least two and the conveyance conduit (3) in the position close to the other end
The bifurcated bypass line of connection.
5. Dynamic Leaching system as claimed in any one of claims 1 to 3, which is characterized in that be laid on the filter (10)
Have with a thickness of 1~4cm, partial size is the quartz sand layer of 1~2cm.
6. Dynamic Leaching system as claimed in any one of claims 1 to 3, which is characterized in that the material of the column shape container (5)
For organic glass；The pore size filter of the filter (10) is 10~20 μm.
7. a kind of Dynamic Leaching method, which comprises the steps of:
S1, leaching solvent, and the interior placement rain gauge (8) into a column shape container (5) are modulated according to local practical rainfall water quality,
The filling sample (9) to be leached into other column shape containers (5)；
S2, starting metering pump (2), leaching solvent are conveyed and is synchronized are sprayed on sample to be leached (9) and rain gauge (8)；
S3, precipitation measured by rain gauge (8) is adjusted into metering pump compared with target rainfall, and according to target rainfall
(2) flow；
S4, the collection leachate of collection vessel (7) is taken in real time and carries out constituent analysis as needed.
8. Dynamic Leaching method as claimed in claim 7, which is characterized in that in the S2, before starting metering pump (2), also
Rainfall parameter including inquiring local history, and set according to target rainfall the flow value of metering pump (2).
9. Dynamic Leaching method as claimed in claim 7 or 8, which is characterized in that the others column shape container (5) includes extremely
It is one few.
10. Dynamic Leaching method as claimed in claim 7 or 8, which is characterized in that the sample (9) to be leached is burnt for rubbish
Burn flying dust, dregs of incinerator, rubbish or other solid waste.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811377758.1A CN109283299A (en) | 2018-11-19 | 2018-11-19 | A kind of Dynamic Leaching system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811377758.1A CN109283299A (en) | 2018-11-19 | 2018-11-19 | A kind of Dynamic Leaching system and method |
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| CN201811377758.1A Pending CN109283299A (en) | 2018-11-19 | 2018-11-19 | A kind of Dynamic Leaching system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111239347A (en) * | 2020-03-27 | 2020-06-05 | 暨南大学 | Method for detecting desorption rate of organic matters in solid waste |
| CN112834416A (en) * | 2021-01-20 | 2021-05-25 | 武汉理工大学 | Road material harmful component leaching device for simulating rainwater environment and leaching method thereof |
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Application publication date: 20190129 |