CN115754202A - Sediment pollution release simulation method and simulation device - Google Patents
Sediment pollution release simulation method and simulation device Download PDFInfo
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Abstract
The invention discloses a sediment pollution release simulation device and an experimental method, and belongs to the field of sludge detection in application environment engineering. The sediment pollution release simulation method comprises the following steps: determining a target pipeline and river and lake sediments, and collecting river and lake sediment samples and overlying water; detecting detection indexes of river and lake sediments and overlying water; adding the water to be coated or the simulated water to be coated into a water inlet barrel, starting a water inlet metering pump to pump the coated water into a constant-temperature water bath, stirring by using a speed-adjustable stirrer and introducing gas by using an aerator; taking a water sample from at least one side water outlet, and detecting the content of each pollutant in the water sample; the content of various pollutants in the water body at the sampling moment is obtained through detection, and the change process of the pollutants released by the bottom mud to the overlying water body is analyzed; and (3) carrying out statistical analysis on the process that the contents of various pollutants released from the bottom mud into the overlying water body change along with time, and carrying out source-sink analysis on the bottom mud and the overlying water pollutants.
Description
Technical Field
The embodiment of the invention relates to the technical field of sludge detection in environmental engineering, in particular to a sediment pollution release simulation method and a sediment pollution release simulation device.
Background
At present, a lot of researches on the release characteristics of deposited pollutants in water bodies and pipelines are carried out, most of the release experiments of the deposited pollutants are carried out in a device with a sediment at the bottom and water at the upper part, the pollution release rule of the sediment, namely static release, can be explored only by changing the water quality condition, and serious distortion exists in the simulation of the real water environment.
The other sediment release device is mainly completed by a method based on a physical model test, wherein the influence of water body disturbance on the release of bottom sediment pollutants is simulated by a piston type, an oscillating type, a wave-making type, a blowing type and other methods. Although the dynamic change of water flow is simulated, most of the methods adopt a circulating flow mode based on the limitation of a laboratory, the interaction with sediment-overlying water in a real environment is different, and the error is large in the sampling and water supplementing process.
In patent document with patent publication number CN108645758a and patent name of a sediment pollutant dynamic release analysis method, although the real water flow condition can be simulated, the wave flow water tank volume required by the indoor water tank test is large, and the sediment is not easy to pave, collect and clean; under the action of circulating water flow, the pollutant is diluted seriously, if sampling is not carried out in time, the pollutant can be quickly diluted, and the change trend of the pollutant concentration cannot be objectively displayed.
In patent document with patent publication number CN113324730a and patent name of experimental method for simulating bottom sludge pollution release under river channel scouring action, although the real power condition of river channel scouring can be truly reflected and the influence of flow making process on bottom sludge disturbance can be reduced, it is difficult to control dissolved oxygen change in deep water or shallow water basin, and there is difference in simulation of natural water quality condition of water body.
Therefore, the research on a device which can truly simulate the dynamic interaction process between sediment and overlying water and can control the conditions of various environments, water quality, water quantity and the like has important significance for mastering the release rule of the sediment.
Disclosure of Invention
The invention aims to provide a sediment pollution release simulation device and a simulation method, which can truly simulate the dynamic interaction process between sediment and overlying water and can control the conditions of various environments, water quality, water quantity and the like.
In one aspect of the present invention, there is provided a sediment contamination release simulation method, including the steps of:
1) Determining a target pipeline and river and lake sediments, collecting river and lake sediment samples and overlying water, and recording basic information;
2) Coding the collected target pipeline, the river and lake sediments and the overlying water sample, and detecting detection indexes of the river and lake sediments and the overlying water;
3) Arranging a constant-temperature water bath at the periphery of the release device, placing river and lake sediments below the release device as bottom mud for analysis, adding overlying water or simulated water of the overlying water into a water inlet barrel, starting a water inlet metering pump to pump the overlying water into the constant-temperature water bath, stirring by using a speed-adjustable stirrer and introducing gas by using an aerator;
4) Taking a water sample from at least one side water outlet, and detecting the content of each pollutant in the water sample;
5) The content of various pollutants in the water body at the sampling moment is obtained through detection, and the change process of the pollutants released by the bottom mud to the overlying water body is analyzed;
6) The process that the content of various pollutants released from the bottom sediment into the overlying water body changes along with time (namely the release process of the pollutants in the bottom sediment) is statistically analyzed, and the release rate and the release amount of the bottom sediment are calculated according to the formulas (Q1) and (Q2);
wherein: rho n The release rate of the bottom sediment at the nth moment is in unit of mg/(m) 2 ·h)；
Δ c is the difference between the pollutant concentration in the water body obtained at the nth moment and the pollutant concentration in the raw water, and Δ c = c n -c 0 The unit is mg/L;
v is the release device volume in units of L;
a is the contact area of the bottom mud and water, and the unit is m 2 ；
t is hydraulic retention time, and the unit is h;
Q n the release amount of the sediment pollutants at the nth moment is mg;
Δ t is a time difference, Δ t = t n -t n-1 The unit is h;
7) After the release rate gradually stabilized, the operation steps were completed, and the content of the contaminants monitored in the bottom sediment sample was again detected, and the bottom sediment and the overburden contaminants were analyzed for "source-sink".
In one example, the steps 3) to 7) are repeated under the conditions of different temperatures, flow rates, dissolved oxygen contents, various qualities and pH values of the overburden water, a series of graphs of the quality change of the overburden water under different conditions are obtained, the release rate and the release amount of the sediment are respectively calculated, and a mathematical expression of the sediment release process is fitted.
In one example, the substrate sludge is a river or lake deposit taken within 48 hours.
In one example, the simulated water is a body of water that simulates water quality conditions of the overlying water.
In one example, the gas introduced by the aerator comprises oxygen or nitrogen.
In one example, the at least one side water outlet comprises a plurality of side water outlets arranged at intervals along the height of the releasing device, and each side water outlet is provided with a valve for controlling opening and closing.
In one example, the substrate sludge is arranged in a cylindrical shape at the bottom of the discharge device, with an outer diameter of 10-15 cm and an inner diameter of 5-8 cm, and the substrate sludge is provided with cover water both peripherally and centrally.
According to another aspect of the present invention, there is provided a sediment contamination release simulation apparatus for implementing the above-described sediment contamination release simulation method, the sediment contamination release simulation apparatus including:
a release device;
the water inlet is positioned at the bottom of the shell of the releasing device;
the thermometer is arranged on the inner wall of the shell of the releasing device;
at least one side water outlet which is positioned outside the shell of the releasing device;
at least one valve, the at least one valve is communicated with the inner cavity of the releasing device and the at least one side water outlet;
the constant-temperature water bath is arranged in the cavity of the releasing device;
the stirrer is arranged at the upper part of the releasing device, and a stirring head of the stirrer penetrates into the constant-temperature water bath in the releasing device through a cover plate of the releasing device;
the air outlet end of the aerator extends into the constant-temperature water bath and provides air;
the water inlet barrel is communicated with the water inlet through a water inlet metering pump;
and the water outlet barrel is used for accommodating water from the side water outlet.
In one example, the cover plate of the releasing device is provided with a stirring hole for allowing the stirring head to pass through and an aeration hole for allowing the air outlet end to pass through.
In one example, the thermostatic water bath is formed by an external thermostatic water bath providing water at a constant temperature into the cavity of the release device.
In one example, the at least one side water outlet comprises a plurality of side water outlets arranged at intervals along the height of the releasing device, and each side water outlet is provided with a valve for controlling opening and closing.
The invention can simulate the interaction process of deposited pollutants between a real pipe network, a river and lake water body and overlying water. Under the condition of a simulated dynamic release experiment, the source-sink interaction of the sediment on the water body is accurately measured and calculated through the change of the pollutant amount in the water medium and the sediment before and after the experiment, compared with a simple static release and circulating flow dynamic release experiment, the method is closer to a real sediment release environment, and the experimental data analysis and evaluation of the release hazard of the sediment pollutant on the water body environment are more objective.
The sediment pollution release simulation method provided by the invention can simulate the conditions of different mud-water ratios, water quality, water quantity, flow velocity, dissolved oxygen and the like of pipelines, rivers and lakes of water bodies more truly, so that the conditions are matched with the actual conditions of the field environment, the process of dynamic interaction between sediment and overlying water is observed, and the release rule is summarized for the sediment of different scenes and conditions.
The sediment pollution release simulation device provided by the invention is an experimental device which is simple in structure and operation, high in working efficiency, dense in integration of parts, small in occupied space and capable of controlling a plurality of different conditions at the same time.
Other objects and advantages of the present invention will become apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, and may help to provide a full understanding of the present invention.
Drawings
The invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a sediment contamination release simulator provided in accordance with an embodiment of the present invention;
FIG. 2 is a top view of a release device in the sediment contamination release simulation apparatus shown in FIG. 1;
FIG. 3 is a bottom view of a release device in the sediment contamination release simulation apparatus shown in FIG. 1;
FIG. 4 is a graph of sediment release rate over time provided in accordance with an example of the invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.
One of the purposes of the invention is to simulate different mud-water ratios, water quality conditions, water quantity conditions, water depth, flow velocity, dissolved oxygen and the like of a real environment when exploring the release rule of pollutants in sludge deposited in various pipelines, rivers, lakes and the like. Under the current forms that the environmental protection pressure is getting larger and the environmental protection quality of social personnel is getting higher, the pollution control of urban pipelines, riverways and lakes not only can achieve the standard reaching problem of the surface water quality, but also can know and solve the pollutants released by sediments hidden under the water, so that the control of the pollution release rule of the sediments is very important.
At present, with the acceleration of the urbanization process, pipelines and rivers in most cities in China have sediment pollution problems of different degrees, and the pipelines and the rivers can be blocked along with the time, even substances harmful to pipe walls and human bodies can be released during sediment fermentation, so that the normal production and life of people are directly influenced. If the direct sampling investigation is carried out, factors such as environment, water quality and the like in the direct sampling investigation are not well controlled, and the rule of the system is difficult to summarize.
Therefore, the invention provides a sediment pollution release simulation device and a simulation method, which are used for simulating the release of the pollutants in the sediment so as to summarize the pollution release rule. The sediment pollution release simulation device has the advantages of corrosion resistance, high strength, convenient assembly and operation, more fit simulation condition, controllable and stable working condition of representing the actual environment, long service life and the like.
Referring to fig. 1, there is provided a deposit contamination release simulation method including the steps of:
1) Determining a target pipeline and river and lake sediments, collecting river and lake sediment samples and overlying water, and recording basic information;
2) Coding the collected target pipeline, the river and lake sediments and the overlying water sample, and detecting detection indexes of the river and lake sediments and the overlying water;
3) Forming a constant-temperature water bath in a release device, placing river and lake sediments below the release device as bottom mud for analysis, adding overlying water or simulated water of the overlying water into a water inlet barrel, starting a water inlet metering pump to pump the overlying water into the constant-temperature water bath, stirring by using a stirrer and introducing gas by using an aerator;
4) Taking a water sample from at least one side water outlet, and detecting the content of each pollutant in the water sample;
5) The content of various pollutants in the water body at the sampling moment is obtained through detection, and the change process of the pollutants released by the bottom mud to the overlying water body is analyzed;
6) The process that the content of various pollutants released from the bottom sediment into the overlying water body changes along with time (namely the release process of the pollutants in the bottom sediment) is statistically analyzed, and the release rate and the release amount of the bottom sediment are calculated according to the formulas (Q1) and (Q2);
wherein: ρ is a unit of a gradient n The release rate of the bottom sediment at the nth moment is in unit of mg/(m) 2 ·h)；
Δ c is the difference between the pollutant concentration in the water body obtained at the nth moment and the pollutant concentration in the raw water, and Δ c = c n -c 0 The unit is mg/L;
v is the release device volume in units of L;
a is the contact area of the bottom mud and water, and the unit m 2 ；
t is hydraulic retention time with the unit of h;
Q n the release amount of the bottom sediment pollutants at the nth moment is mg;
Δ t is a time difference, Δ t = t n -t n-1 The unit is h;
7) After the release rate is gradually stabilized, the operation step is finished or the experiment is finished, the content of the monitored pollutants in the sediment sample is detected again, and the sediment and the overlying water pollutants are subjected to source-sink analysis.
When suspended particles or more pollutants exist in a water body and the water quality is poor, the pollutants and solid particles in the water can be deposited on the bottom mud, the overlying water is a 'source' of the pollution of the bottom mud, and the bottom mud is a 'gathered' pollutant; when the pollutants are gathered to a certain degree in the sediment, the sediment releases the pollutants in the overlying water under the action of water flow scouring and microorganisms due to the change of the flow rate of water, so that the water quality of the water body is deteriorated, the sediment is a pollution source, and the pollutants are gathered in the overlying water, so that the water body is deteriorated. Therefore, the source-sink analysis is to judge the interaction between the sediment and the water body, which is the source and which is the sink, through experimental data.
In one embodiment, the steps 3) to 7) are repeated under the conditions of different temperatures, flow rates, dissolved oxygen contents, various qualities and pH values of the overburden water, a series of graphs of the quality change of the overburden water under different conditions are obtained, the release rate and the release amount of the sediment are respectively calculated, and a mathematical expression of the sediment release process is fitted.
In step 3), the bottom sludge is river and lake sediment taken within 48 hours. Preferably, the release device is sealed before the intake metering pump is started to ensure the accuracy of the measurement results.
In addition, the simulated water is a water body simulating the water quality condition of the overlying water.
In one example, the gas introduced by the aerator comprises oxygen or nitrogen.
In another example, the at least one side water outlet comprises a plurality of side water outlets arranged at intervals along the height of the releasing device, and each side water outlet is provided with a valve for controlling opening and closing.
As shown in fig. 1, the embodiment of the present invention further provides a sediment contamination release simulation apparatus 100, and the sediment contamination release simulation apparatus 100 is used for implementing the sediment contamination release simulation method. The sediment pollution release simulation device 100 comprises a release device 10, a thermostatic water bath 20, a stirrer 30, an aerator 40, a water inlet barrel 50 and a water outlet barrel 60.
Specifically, the releasing device 10 further comprises a water inlet 12, a thermometer 14, at least one side water outlet 16 and at least one valve 18. The water inlet 12 is located at the bottom of the housing of the delivery device 10. The thermometer 14 is arranged on the inner wall of the housing of the releasing means 10. The side water outlets 16 are located outside the housing of the delivery device 10. At least one valve 18 communicates with the interior chamber of the delivery device 10 and at least one side outlet 16.
A thermostatic water bath 20 is arranged in the cavity of the releasing device 10; the thermostatic water bath 20 is formed by supplying water at a constant temperature into the cavity of the discharge device 10 through an external thermostatic water bath tank 70. The thermometer 14 measures the temperature of the thermostatic water bath 20 and is used for subsequent monitoring.
The stirrer 30 is disposed at the upper portion of the discharging device 10 and the stirring head of the stirrer 30 penetrates into the thermostatic waterbath 20 inside the discharging device 10 through the cover plate 11 of the discharging device 10. In one example, the thermostatic water bath 20 has a height of 20.75 centimeters.
The air outlet end of the aerator 40 extends into the thermostatic water bath 20 and supplies air. The intake water tank 50 is communicated with the intake port 12 through an intake water metering pump 90. The water outlet bucket 60 is used for receiving water from the side water outlet 16.
As shown in fig. 2, the cover plate 11 of the releasing device 10 is provided with a stirring hole 13 for allowing a stirring head to pass through and an aeration hole 15 for allowing an air outlet end to pass through. The aperture of the stirring hole is 1.5 cm, and the aperture of the aeration hole is 0.4 cm.
The side water outlets 16 include a plurality of side water outlets spaced along the height of the releasing device 10, and each side water outlet is provided with a valve 18 for controlling opening and closing.
In one example, 5 side outlets are provided, each 4 cm apart, with the side outlet closest to the sediment 80 being flush with or 1-2 cm higher than the top of the sediment 80 to facilitate better extraction of the water for detection, but to minimize disturbance to the sediment 80.
Referring to fig. 3, the bottom sludge 80 forms a cylindrical shape at the bottom of the discharging device 10, the middle is the water inlet 12, and the water inlet 12 is circular and has a diameter of 0.7 cm. The bottom sludge 80 has an outer diameter of 12 cm and an inner diameter of 7 cm. The periphery of the bottom sediment 80 is provided with a constant temperature water bath 20, the outer diameter of the constant temperature water bath 20 is 15 cm, and the inner diameter is 12 cm. It will be appreciated that the cylindrical bottom mud 80 has an outer diameter in the range of 10-15 cm and an inner diameter in the range of 5-8 cm, with the top water being provided around and in the center of the bottom mud 80.
Examples of the invention
For a certain city combined pipe network, under the action of the water flow of the pipeline, sludge at the bottom of the pipe network is flushed, pollutants in the sediments are continuously released upwards and finally flow to the river channel, so that the river pollution is serious.
1.00kg of bottom mud 80 samples are collected in a pipe network inspection well, 250.00L of overlying water is collected, the samples are respectively numbered and the sampling information is recorded, and the samples are timely sent to a laboratory for detection and pollutant deposition release experiments.
Introducing a constant-temperature water bath 20 to simulate the environment, controlling the temperature of a constant-temperature water bath box 70 to be 25 ℃, paving the obtained sediment sample at the bottom to form bottom mud 80 or a sediment layer, wherein the paving thickness is 3cm, and the control error is less than +/-0.01 mm; the experimental set-up was assembled and sealed to begin the experiment.
Taking the taken water sample as inflow water, starting an inflow water metering pump 90, and controlling Hydraulic Retention Time (HRT) =1h (hour); keeping the 3 rd valve 18 on the side edge from bottom to top open and the rest closed; the releasing volume of the device is 2L, the rotating speed of the stirrer 30 is 200r/min, and disturbance is produced; controlling the aerator 40 to make the dissolved oxygen be 1mg/L; simultaneously completing the pH value, total Nitrogen (TN), total Phosphorus (TP) and ammonia Nitrogen (NH) of the bottom sludge 80 and the overlying water 4 + -N), chemical Oxygen Demand (COD) Cr ) And the detection of indexes such as heavy metals, as shown in Table 1, as the initial index of the bottom mud and the water quality index of the water body at the 0 th momentThe label is the initial value.
In order to ensure the accuracy and reliability of the experiment, all water samples and mud samples are placed in a refrigerator for low-temperature storage before detection and detection is completed within 48 h.
And (3) statistically analyzing the time-varying process of the content of various pollutants released by the sediment to the overlying water, namely the release process of the bottom sediment pollutants, and calculating the release rate and the release amount of the bottom sediment according to the formulas (Q1) and (Q2). This example was carried out in the dark, in an anoxic state, at an ambient temperature of 25 ℃. Setting the sampling time to be 0h (initial water quality), 1h, 4h, 8h, 16h, 24h, 32h, 40h, 48h, 56h, 64h, 72h, 80h, 88h, 96h, 104h, 112h and 120h.
The contact area of muddy water A = pi (R) 2 1 -R 2 2 )＝3.14×(100-6.25)＝295cm 2 。
500mL of water sample is obtained every time (the water sample can meet the water quality detection requirement), and the pH value, TN, TP and NH in the water sample are detected 4 + -N、COD Cr And heavy metals, etc. The TP content in the water sample changes along with time as shown in Table 1, the total TP release amount of 120h sediment is calculated to be 231.46mg, the specific calculation is detailed in Table 1, and the curve of the bottom sediment release rate along with time is shown in figure 4.
It can be seen from fig. 4 that, in the whole reaction process, the change rate of the sediment release rate along with time is plotted according to the data in table 1, so that the gradual decrease of the sediment release rate along with time can be more intuitively shown, the decrease rate is gradually reduced, and finally, the stability is reached, which indicates that the pollutants in the sediment are released into water along with the increase of time, so that the content of the pollutants in the sediment is reduced, and finally, the pollutants and the water are kept in balance. The experiment can be verified to accord with the scientific rule according to the curve trend.
TABLE 1 Change of TP with time in Water samples
The invention can simulate the interaction process of deposited pollutants between a real pipe network, a river and lake water body and overlying water. Under the condition of a simulated dynamic release experiment, the source-sink interaction of the sediment to the water body is accurately measured and calculated through the change of the pollutant amount in the aqueous medium and the sediment before and after the experiment, compared with a simple static release and circulating flow dynamic release experiment, the method is closer to a real sediment release environment, and the method is more objective for analyzing and evaluating the release hazard of the sediment pollutant to the water body environment by using the experimental data.
The sediment pollution release simulation method provided by the invention can simulate the conditions of different mud-water ratios, water quality, water quantity, flow velocity, dissolved oxygen and the like of pipelines, rivers and lakes of water bodies more truly, so that the conditions are matched with the actual conditions of the field environment, the process of dynamic interaction between sediment and overlying water is observed, and the release rule is summarized for the sediment of different scenes and conditions.
The sediment pollution release simulation device provided by the invention is an experimental device which is simple in structure and operation, high in working efficiency, dense in integration of parts, small in occupied space and capable of controlling a plurality of different conditions at the same time.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A deposit contamination release simulation method comprising the steps of:
1) Determining a target pipeline and river and lake sediments, collecting river and lake sediment samples and overlying water, and recording basic information;
2) Coding the collected target pipeline, the river and lake sediments and the overlying water sample, and detecting detection indexes of the river and lake sediments and the overlying water;
3) Arranging a constant-temperature water bath on the periphery of the release device, placing river and lake sediments below the release device as bottom mud for analysis, adding overlying water or simulated water of the overlying water into a water inlet barrel, starting a water inlet metering pump to pump the overlying water into the constant-temperature water bath, stirring by using a speed-adjustable stirrer and introducing gas by using an aerator;
4) Taking a water sample from at least one side water outlet, and detecting the content of each pollutant in the water sample;
5) The content of various pollutants in the water body at the sampling moment is obtained through detection, and the change process of the pollutants released by the bottom mud to the overlying water body is analyzed;
6) The process that the content of various pollutants released from the bottom sediment into the overlying water body changes along with the time is statistically analyzed, and the release rate and the release amount of the bottom sediment are calculated according to formulas Q1 and Q2;
wherein: rho n The release rate of the sediment at the nth moment is mg/(m) 2 ·h)；
Δ c is the difference between the pollutant concentration in the water body obtained at the nth moment and the pollutant concentration in the raw water, and Δ c = c n -c 0 In mg/L;
v is the release device volume in units of L;
a is the contact area of the bottom mud and water, and the unit m 2 ；
t is hydraulic retention time, and the unit is h;
Q n the release amount of the bottom sediment pollutants at the nth moment is mg;
Δ t is a time difference, Δ t = t n -t n-1 The unit is h;
7) And after the release rate is gradually stabilized, detecting the content of the monitored pollutants in the sediment sample again, and performing source-sink analysis on the sediment and the overlying water pollutants.
2. The method for simulating release of deposit contamination according to claim 1,
and (3) repeating the steps 3) to 7) under the conditions of different temperatures, flow rates, dissolved oxygen contents, and various qualities and pH values of the overburden water, obtaining a water quality change series chart of the overburden water under different conditions, respectively calculating the release rate and the release amount of the sediment, and fitting a mathematical expression of the sediment release process of the sediment.
3. The method for simulating release of deposit contamination according to claim 1,
the bottom sludge is river and lake sediment obtained within 48 hours.
4. The method for simulating release of deposit contamination according to claim 1,
the simulated water is a water body simulating the water quality condition of the overlying water; the gas introduced by the aerator comprises oxygen or nitrogen.
5. The method for simulating release of deposit contamination according to claim 1,
the at least one side water outlet comprises a plurality of side water outlets arranged at intervals along the height of the releasing device, and each side water outlet is provided with a valve used for controlling opening and closing.
6. A method for simulating release of a deposit contamination according to any one of claims 1 to 5,
the bottom of the release device is cylindrical, the outer diameter of the bottom is 10-15 cm, the inner diameter of the bottom is 5-8 cm, and the periphery and the center of the bottom sludge are both provided with covering water.
7. A sediment contamination release simulation apparatus for implementing a sediment contamination release simulation method according to any one of claims 1 to 6, the sediment contamination release simulation apparatus comprising:
a release device;
the water inlet is positioned at the bottom of the shell of the releasing device;
the thermometer is arranged on the inner wall of the shell of the releasing device;
at least one side water outlet which is positioned outside the shell of the releasing device;
at least one valve, the at least one valve is communicated with the inner cavity of the releasing device and the at least one side water outlet;
the constant-temperature water bath is arranged in the cavity of the releasing device;
the stirrer is arranged at the upper part of the releasing device, and a stirring head of the stirrer penetrates into the constant-temperature water bath in the releasing device through a cover plate of the releasing device;
the air outlet end of the aerator extends into the constant-temperature water bath and provides air;
the water inlet barrel is communicated with the water inlet through a water inlet metering pump;
a water outlet bucket for receiving water from the at least one side water outlet.
8. The simulation apparatus for release of sediment contamination according to claim 7, wherein the cover plate of the release apparatus is provided with a stirring hole for allowing the stirring head to pass through and an aeration hole for allowing the air outlet end to pass through.
9. The sediment contamination release simulation device of claim 7, wherein the thermostatic water bath is formed by providing water at a constant temperature into a cavity of the release device through an external thermostatic water bath tank.
10. The release simulator of claim 7, wherein the at least one side outlet comprises a plurality of side outlets spaced along the height of the release device, each side outlet having a valve for controlling opening and closing.
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| CN116338131A (en) * | 2023-05-23 | 2023-06-27 | 中交第一航务工程局有限公司 | Test device and method for simulating microbial water quality restoration under different hydrodynamic conditions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116338131A (en) * | 2023-05-23 | 2023-06-27 | 中交第一航务工程局有限公司 | Test device and method for simulating microbial water quality restoration under different hydrodynamic conditions |
| CN116338131B (en) * | 2023-05-23 | 2023-08-22 | 中交第一航务工程局有限公司 | Test device and method for simulating microbial water quality restoration under different hydrodynamic conditions |
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