CN108931608A - A kind of curing sludge diffusate collects test device and method - Google Patents
A kind of curing sludge diffusate collects test device and method Download PDFInfo
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- CN108931608A CN108931608A CN201810415837.0A CN201810415837A CN108931608A CN 108931608 A CN108931608 A CN 108931608A CN 201810415837 A CN201810415837 A CN 201810415837A CN 108931608 A CN108931608 A CN 108931608A
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Abstract
The present invention provides a kind of curing sludge diffusate collection test device, exudation system including holding sample, the monitoring system for the diffusate for monitoring sample exudation being connect by drain line with the exudation system and the pressure system for making the sample ooze out the diffusate being connect with the exudation system, the pressure system includes nitrogen cylinder and water tank, deionized water is housed in the water tank, the nitrogen cylinder makes nitrogen enter the water tank from the upper end of the water tank by the upper end that air inlet pipeline connects the water tank, the lower end of the water tank, which is connect by inlet pipeline with the exudation system, makes the deionized water enter the exudation system by the inlet pipeline from the lower end of the water tank.Beneficial effect：Analog is under long-term seepage action condition, release, migration and conversion process of the heavy metal in curing sludge.
Description
Technical field
It collects and surveys the present invention relates to Environmental Geotechnical and field of environment engineering technology more particularly to a kind of curing sludge diffusate
Try device and method.
Background technique
With the quickening of urbanization process, life and a large amount of discharges of industrial wastewater cause the dirt of river, lake silt
Dye.Contaminated mud has the characteristics that high-moisture percentage, high organic content, and is rich in a large amount of pollutants.Wherein, heavy metal from
Son is main pollutant in mud, cannot be degraded by microorganisms in the natural environment.Once the heavy metal ion in mud is logical
Cross dissolution, migration enters biosphere, can be enriched under the biomagnification of the food chain, make with the intracorporal protein of animal
With influencing the normal physiological activity of animal.In addition, salinity is higher in mud, the conductivity of ambient enviroment can be significantly improved, is inhibited
Absorption of the plant to nutrient, damages root system of plant.Therefore, Practical Project production in need to the pollutant in mud into
Row is dealt carefully with, and is avoided or reduced to eco-environmental impact.
Curing/stabilizing (S/S) technology is that processing mud is relatively inexpensive, effective method.Which is by mud and to consolidate
Change material to be mixed in a certain ratio, the intensity of mud is improved by the physical absorption of curing materials and chemical action, is reduced simultaneously
The dissolubility and transfer ability of heavy metal.The curing sludge that cured/stabilization technology is handled can be used as civil engineering
Material is used, and will not cause secondary pollution to environment.
Currently, pollutant effects research mainly passes through acquisition construction site curing sludge sample and surrounding in curing sludge
Contaminated water sample is analyzed and evaluated.This method needs to expend a large amount of manpower and material resources, and can only obtain limited hits
According to, it is difficult to comprehensively, correctly evaluate influence situation of the pollutant to environment in curing sludge.Therefore, research is acted in long-term seepage
Under the conditions of, the release of pollutant, migration situation have become project important in geotechnical engineering in curing sludge.
Summary of the invention
In view of this, the embodiment provides a kind of analogs under long-term seepage action condition, heavy metal exists
The curing sludge diffusate of release, migration and conversion process in curing sludge collects test device and method.
The embodiment of the present invention provides a kind of curing sludge diffusate collection test device, the exudation system including holding sample
System, the monitoring system for being used to monitor the diffusate that the sample oozes out connect with the exudation system by drain line and with
The exudation system connection is used to that the sample to be made to ooze out the pressure system of the diffusate, and the pressure system includes nitrogen
Bottle and water tank, deionized water is equipped in the water tank, and the nitrogen cylinder makes nitrogen by the upper end that air inlet pipeline connects the water tank
Gas enters the water tank from the upper end of the water tank, and the lower end of the water tank, which is connect by inlet pipeline with the exudation system, to be made
The deionized water enters the exudation system by the inlet pipeline from the lower end of the water tank.
Further, the exudation system includes exudation room, further includes being horizontally placed on the indoor upper porous permeable of exudation
Plate and lower porous permeable plate, the upper porous permeable plate and the lower porous permeable plate are setting up and down and be parallel to each other, the examination
Sample is set between the upper porous permeable plate and the lower porous permeable plate, the water outlet connection or close of the inlet pipeline
The lower porous permeable plate to import the deionized water in the sample from the bottom up, and the upper porous permeable plate is close to institute
State drain line or connect with the drain line so that the diffusate from upper by the upper porous permeable plate and described
Drain line discharge.
Further, the exudation system further includes base and cover plate, and the exudation room is embedded in the pedestal, described
Cover board be used for seal it is described exudation room upper end opening, an elastic valve be set to the cover board upper end, for by the cover board to
The exudation room is filled in downwards in upper extraction.
Further, the pedestal includes being parallel to each other and upper plate and lower plate setting up and down, the exudation room
Bottom end is embedded in the lower plate, and the inlet pipeline protrudes into the lower plate, connection or close after water outlet is folded upward at
The lower porous permeable plate, the lower end of the elastic valve pass through the upper plate and connect with the cover board and in the elastic valve
Connection is engaged by screw thread with the upper plate in portion.
Further, the monitoring system includes weighing device, data collector sum aggregate sample bottle, and the collection sample bottle is located at institute
It states on weighing device, bottle neck is plugged with aperture rubber stopper, and the outlet end of the drain line passes through the opening rubber stopper and protrudes into
In the liquid-collecting bottle, pH sensor and conductivity sensor are also through the opening rubber stopper and protrude into the liquid-collecting bottle, described
Weighing device, the pH sensor and the conductivity sensor pass through cable and connect with the data acquisition device.
Further, the collection sample bottle is with graduated conical flask, and the data collector passes through data line and computer
Connection, the computer are used to control the data acquisition time of the data collector.
Further, the water tank includes organic glass wall and the metal frame set on the organic glass wall upper and lower ends
Frame, the metal framework are connected through a screw thread with the organic glass wall, and a gas exhaust and liquid supplementation interface is set to the upper end of the water tank,
For deionized water cover or the discharge of nitrogen, the inlet pipeline protrude into the metal framework positioned at lower end, and its
Water inlet end is folded upward to be connected to inside the water tank.
Further, the air inlet pipeline is equipped with air pressure regulator and pressure gauge, and the inlet pipeline is equipped with bilateral
Valve.
The embodiment of the present invention also provides a kind of curing sludge diffusate collection test method, utilizes above-mentioned curing sludge
Diffusate is collected test device and is tested, and includes the following steps：
S1：The deionized water is injected into the water tank；
S2：Sample is packed into the exudation system；
S3：The nitrogen cylinder is opened, the deionized water is pressed by the exudation system by the nitrogen；
S4：The monitoring system acquisition to first drip the diffusate when, the monitoring system starts timing, and starts to adopt
Collect the real-time parameter of the diffusate；
S5：Sampling time interval is set, the diffusate is sampled at times, and analyzes the described of per period acquisition
The concentration of each anions and canons in diffusate；
S6：According to each anions and canons in pressure value, the real-time parameter and the every section of diffusate in the water tank
Concentration, analyze release, migration and conversion process of the pollutant in the sample.
The embodiment of the present invention provide technical solution bring beneficial effect be：
(1) present invention carries out long-term seepage monitoring, solution to the representative sample (curing sludge) by indoor
It has determined the inconvenient problem of live irregular sampling.
(2) output pressure of pressure system of the present invention is controllable, so as to effectively control the exudation system
Osmotic pressure, so as to simulate the process of the native water phase interaction under different precipitation, Infiltration Condition.
(3) conical flask collects the diffusate, and is convenient for sampling analysis at times；It is the weighing device, described
PH sensor and the conductivity sensor can diffusate described in real-time monitoring physicochemical property, and realize automation behaviour substantially
Make.
(4) pH value of the invention by flow, the diffusate to osmotic pressure, the diffusate, the diffusate
Conductivity and the diffusate in the parameters such as each anions and canons concentration analysis, can understand under the conditions of long-term seepage,
The release, migration and conversion situation of pollutant in the sample (curing sludge), so as to evaluate curing agent curing sludge
Effect, to take effective environmental protection measure to provide reference frame.
Detailed description of the invention
Fig. 1 is the schematic diagram that curing sludge diffusate of the present invention collects test device；
Fig. 2 is the flow chart that curing sludge diffusate of the present invention collects test method.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Referring to FIG. 1, the embodiment provides a kind of curing sludge diffusates to collect test device, including hold
The exudation system of sample 12, the infiltration oozed out for monitoring the sample 12 being connect with the exudation system by drain line 14
The monitoring system of liquid and the pressure system for making the sample 12 ooze out the diffusate being connect with the exudation system out.
The sample 12 is construction site curing sludge sample and its contaminated water sample of surrounding.
The pressure system includes nitrogen cylinder 1 and water tank 5, and the nitrogen cylinder 1 connects the water tank by air inlet pipeline 4
Upper end makes nitrogen enter the water tank 5 from the upper end of the water tank 5, and the air inlet pipeline 4 is equipped with air pressure regulator 2 and pressure
Table 3, the air pressure regulator 2 are used to adjust the nitrogen pressure that the nitrogen cylinder 1 exports, and the pressure gauge 3 is described for monitoring
Air pressure in air inlet pipeline 4 and the water tank 5.
The water tank 5 includes organic glass wall 52 and the metal framework 51 set on 52 upper and lower ends of organic glass wall,
The metal framework 51 is connected through a screw thread with the organic glass wall 52, the organic glass wall 51 and two metal frameworks
Space between 52 is storage chamber, central area and institute of the air inlet pipeline 4 by the metal framework 51 positioned at upper end
State storage chamber connection.One gas exhaust and liquid supplementation interface 53 is set to the upper end of the water tank 5, for deionized water to be covered the storage chamber
Or the storage chamber is discharged in nitrogen.
The water tank 5 is connect by an inlet pipeline 6 with the exudation system, and the inlet pipeline 6 is protruded into positioned at lower end
The metal framework 51 in, and its water inlet end be folded upward at until be connected to inside the water tank 5.In the present embodiment, institute
The water inlet end and the inlet pipeline 6 for stating inlet pipeline 6 protrude between the part in the metal framework 51 of lower end
Angle be 90 ° or the water inlet end of the inlet pipeline 6 be folded upward at 90 ° after continue to upwardly extend until with the water storage
Chamber connection.
The inlet pipeline 6 can export the deionized water in the storage chamber.By the organic glass wall 52,
It can see that the deionized water in the storage chamber.
The exudation system includes exudation room 13, further includes being horizontally placed on the indoor upper porous permeable plate 11 of the exudation under
Porous permeable plate, the upper porous permeable plate 11 and the lower porous permeable plate are setting up and down and be parallel to each other, and the sample is set
Between the upper porous permeable plate 11 and the lower porous permeable plate.The exudation system further includes pedestal 9 and cover board 10, institute
State exudation room 13 be embedded in the pedestal 9, specifically, the pedestal 9 include be parallel to each other and upper plate setting up and down and
The bottom end of lower plate, the exudation room 13 is embedded in the lower plate.
The cover board 10 is used to seal the upper end opening of the exudation room 13, and the lower end of an elastic valve 8 passes through the upper bottom
Plate is connect with the cover board 10 and connection with the upper plate is engaged by screw thread in the middle part of the elastic valve 8.Rotate the pine
When tight valve 8, the elastic valve precession screws out the upper plate perhaps so as to by the upward extraction of the cover board 10 or downwards
Fill in the exudation room 13.The inlet pipeline 6 protrudes into the lower plate, and water outlet connects after being folded upward at or close to institute
Lower porous permeable plate is stated, the deionized water is imported from the bottom up in the sample, the upper porous permeable plate 11 is close
The drain line 14 is connect so that the diffusate passes through the upper porous permeable plate from upper with the drain line 14
11 and the drain line 14 be discharged.The elastic valve 8, the pedestal 9, the cover board 10, the upper porous permeable plate 11, institute
The central axes for stating porous permeable plate and the sample 12 are consistent.
In the present embodiment, the water outlet of the inlet pipeline 6 and the inlet pipeline 6 protrude into the portion in the lower plate
/ angle be 90 ° or the water inlet end of the inlet pipeline 6 be folded upward at 90 ° after continue to upwardly extend until can be to
The sample imports the deionized water.The part drain line 14 is embedded in the cover board 10, and the drain line 14
Liquid feeding end bend downward 90 ° until close to the upper porous permeable plate 11 or connecting with the upper porous permeable plate 11.
The inlet pipeline 6 is equipped with two-way valve 7, opens the two-way valve 7, and the water tank 5 connects with the exudation room 13
Logical, the deionized water can flow into the exudation room 13 from the water tank 5.
The monitoring system includes weighing device, 20 sum aggregate sample bottle of data collector, and the collection sample bottle is located at the weighing
On device, bottle neck is plugged with aperture rubber stopper, and the outlet end of the drain line 14 protrudes into described across the opening rubber stopper
In liquid-collecting bottle, pH sensor 15 and conductivity sensor 16 are also through the opening rubber stopper and protrude into the liquid-collecting bottle, described
Weighing device, the pH sensor 15 and the conductivity sensor 16 are connected by cable 19 and the data acquisition device 20
It connects.The collection sample bottle be with graduated conical flask 17, it is transparent, can also measure and be adopted while acquiring the diffusate
The volume of the diffusate of collection, the data collector 20 are connect by data line 21 with computer 22, and the computer 22 is used for
Timing is used to control the data acquisition time of the data collector 20 simultaneously.The weighing device is electronic balance 18, is used for
The weight of the collected diffusate of measurement.
The pH sensor 15 is used to detect the pH value of the diffusate, and the conductivity sensor 16 is described for detecting
The conductivity of diffusate can automatically obtain the diffusate by the pH sensor 15 and the conductivity sensor 16
Physicochemical property.The data collector 20 can read the pH sensor 15 in real time and the conductivity sensor 16 acquires
The diffusate real-time parameter.
Preferably, the air inlet pipeline 4 and the inlet pipe 6 select PVC hose, the drain line 14 selects silicon
Sebific duct.
Preferably, the adjustable range of the air pressure regulator 2 is 0~1MPa, precision 0.01MPa.
Preferably, the range of weighing of the electronic balance 18 is 0~3000g, precision 0.01g.
Preferably, the Concentration Testing range of the pH sensor 15 is 0~14, precision 0.01.
Preferably, the Concentration Testing range of the conductivity sensor 16 is 0~20000 μ S/cm, precision is 0.1 μ S/
cm。
The embodiment provides a kind of curing sludge diffusates to collect test method, described solid using above-mentioned sheet
Change mud diffusate collection test device to test sample, include the following steps：
S1：The deionized water is injected into the water tank 5.
S2：Sample is packed into the exudation system.
S3：The nitrogen cylinder 1 is opened, the deionized water is pressed by the exudation system by the nitrogen.
S4：The monitoring system acquisition to first drip the diffusate when, the monitoring system starts timing, and starts to adopt
Collect the real-time parameter of the diffusate.
S5：Sampling time interval is set, the diffusate is sampled at times, and analyzes the described of per period acquisition
The concentration of each anions and canons in diffusate.In order to guarantee that the accuracy of test need to close the two-way valve every time when sampling
7, and time out.
S6：According to each yin, yang in pressure value, the real-time parameter and the every section of diffusate in the water tank 5 from
The concentration of son analyzes release, migration and conversion process of the pollutant in the sample.
It is illustrated below by taking specific embodiment as an example to collect test method to the curing sludge diffusate：
Mud of the somewhere containing heavy metal contaminants is chosen, after carrying out curing process using certain curing agent, diameter, which is made, is
61.8mm is highly the sample of 40mm.
Referring to FIG. 2, closing the two-way valve 7 before test starts, the ionized water will be gone to connect via the gas exhaust and liquid supplementation
Mouth 53 injects water tanks 5, and the gas exhaust and liquid supplementation interface 53 is closed after going the ionized water to fill the water tank 5；Adjust the pine
Tight valve 8, is sequentially placed into the exudation room 13 for the lower porous permeable plate, the sample 12 and the upper porous permeable plate 11,
The elastic valve 8 is tightened after covering the cover board 10, guarantees that each section fits closely in the exudation room 13.
When test, the valve of the two-way valve 7 and the nitrogen cylinder 1 is successively opened, is arranged by the air pressure regulator 2
Admission pressure is 0.3MPa, and the sample is made sufficiently to be vented saturation；The first drop diffusate is instilled to the conical flask 17, is opened
Beginning timing controls the data collector 20 using computer 22, and real-time monitoring oozes out the flow quantity, pH value and conductivity value etc.
Parameters variation situation.
Setting sampling time interval is 1h, 2h, 4h, 6h, 10h, 16h, for 24 hours, acquires diffusate described in 10ml every time, is utilized
Inductively-coupled plasma spectrometer ICP-OES tests anions and canons concentration, especially concentration of heavy metal ion in diffusate,
It discharges, migrate and transformation rule to understand pollutant in curing sludge.For the accuracy of guarantee test, every time when sampling,
Two-way valve 7, and time out are closed described in need to closing.
When off-test, terminate computer timing, saves data, successively close 1 valve of nitrogen cylinder and the two-way valve
7, it opens the gas exhaust and liquid supplementation interface 53 and nitrogen is discharged；After device internal pressure power discharges completely, unscrew the elastic valve 8, successively
Take out the cover board 10, the upper porous permeable plate 11, the sample 12 and the lower porous permeable plate.
Herein, the nouns of locality such as related front, rear, top, and bottom are to be located in figure with components in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of curing sludge diffusate collects test device, it is characterised in that：Including hold sample exudation system, with it is described
The monitoring system for the diffusate for monitoring sample exudation that exudation system is connected by drain line and with the exudation
System connection is used to that the sample to be made to ooze out the pressure system of the diffusate, and the pressure system includes nitrogen cylinder and water
Case, deionized water is equipped in the water tank, and the nitrogen cylinder makes nitrogen from institute by the upper end that air inlet pipeline connects the water tank
The upper end for stating water tank enters the water tank, and the lower end of the water tank, which is connect by inlet pipeline with the exudation system, makes described go
Ionized water enters the exudation system by the inlet pipeline from the lower end of the water tank.
2. curing sludge diffusate as described in claim 1 collects test device, it is characterised in that：The exudation system includes
Room is oozed out, further includes being horizontally placed on the indoor upper porous permeable plate of the exudation and lower porous permeable plate, the upper porous permeable plate
It is setting up and down with the lower porous permeable plate and be parallel to each other, the sample be set to the upper porous permeable plate and it is described under it is porous
Between porous disc, the connection of the water outlet of the inlet pipeline or close to the lower porous permeable plate with by the deionized water from
Under up import in the sample, the upper porous permeable plate connect close to the drain line or with the drain line with
The diffusate is discharged by the upper porous permeable plate and the drain line from upper.
3. curing sludge diffusate as claimed in claim 2 collects test device, it is characterised in that：The exudation system is also wrapped
Base and cover plate is included, the exudation room is embedded in the pedestal, and the cover board is used to seal the upper end opening of the exudation room,
One elastic valve is set to the upper end of the cover board, for the cover board to be extracted to upwards or filled in downwards the exudation room.
4. curing sludge diffusate as claimed in claim 3 collects test device, it is characterised in that：The pedestal includes mutual
The bottom end of parallel and setting up and down upper plate and lower plate, the exudation room is embedded in the lower plate, and the inlet pipeline is stretched
Enter the lower plate, water outlet connects after being folded upward at or close to the lower porous permeable plate, the lower end of the elastic valve
It is connect across the upper plate with the cover board and connection with the upper plate is engaged by screw thread in the middle part of the elastic valve.
5. curing sludge diffusate as described in claim 1 collects test device, it is characterised in that：The monitoring system includes
Weighing device, data collector sum aggregate sample bottle, the collection sample bottle are located on the weighing device, and bottle neck is plugged with aperture rubber
Plug, the outlet end of the drain line pass through the opening rubber stopper and protrude into the liquid-collecting bottle, and pH sensor and conductivity pass
Sensor is also through the opening rubber stopper and protrudes into the liquid-collecting bottle, the weighing device, the pH sensor and the conductance
Rate sensor passes through cable and connect with the data acquisition device.
6. curing sludge diffusate as claimed in claim 5 collects test device, it is characterised in that：The collection sample bottle be with
The conical flask of scale, the data collector are connect by data line with computer, and the computer is for controlling the data acquisition
The data acquisition time of device.
7. curing sludge diffusate as described in claim 1 collects test device, it is characterised in that：The water tank includes organic
Glass wall and metal framework set on the organic glass wall upper and lower ends, the metal framework pass through with the organic glass wall
Be threadedly coupled, a gas exhaust and liquid supplementation interface be set to the water tank upper end, for deionized water cover or the discharge of nitrogen, institute
It states inlet pipeline and protrudes into the metal framework positioned at lower end, and its water inlet end is folded upward at and is connected to inside the water tank.
8. curing sludge diffusate as described in claim 1 collects test device, it is characterised in that：It is set on the air inlet pipeline
There are air pressure regulator and pressure gauge, the inlet pipeline is equipped with two-way valve.
9. a kind of curing sludge diffusate collects test method, it is characterised in that：It is described in any item using claim 1 to 8
Curing sludge diffusate is collected test device and is tested, and includes the following steps：
S1：The deionized water is injected into the water tank；
S2：Sample is packed into the exudation system；
S3：The nitrogen cylinder is opened, the deionized water is pressed by the exudation system by the nitrogen；
S4：The monitoring system acquisition to first drip the diffusate when, the monitoring system starts timing, and start acquire institute
State the real-time parameter of diffusate；
S5：Sampling time interval is set, the diffusate is sampled at times, and analyzes the exudation of per period acquisition
The concentration of each anions and canons in liquid；
S6：According to the dense of each anions and canons in pressure value, the real-time parameter and the every section of diffusate in the water tank
Degree analyzes release, migration and conversion process of the pollutant in the sample.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810415837.0A CN108931608B (en) | 2018-05-03 | 2018-05-03 | Solidified sludge leachate collection and test device and method |
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| CN201810415837.0A CN108931608B (en) | 2018-05-03 | 2018-05-03 | Solidified sludge leachate collection and test device and method |
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Cited By (1)
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| CN110146653A (en) * | 2019-05-29 | 2019-08-20 | 河海大学 | A kind of simulator and application method of liquidation curing sludge underwater casting |
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