CN214408609U - Infiltration reaction wall testing arrangement - Google Patents
Infiltration reaction wall testing arrangement Download PDFInfo
- Publication number
- CN214408609U CN214408609U CN202120571816.5U CN202120571816U CN214408609U CN 214408609 U CN214408609 U CN 214408609U CN 202120571816 U CN202120571816 U CN 202120571816U CN 214408609 U CN214408609 U CN 214408609U
- Authority
- CN
- China
- Prior art keywords
- water
- area
- permeable reactive
- water inlet
- reactive wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a permeable reactive wall testing arrangement relates to permeable reactive wall technical field, the utility model provides a permeable reactive wall testing arrangement, include: a test vessel, a sewage supply assembly and a header tank; a partition is arranged in the test container, the partition partitions an inner cavity of the test container to form a water inlet area, a water-bearing layer medium area, a permeable reaction wall simulation area and a water outlet area, and the water inlet area, the water-bearing layer medium area, the permeable reaction wall simulation area and the water outlet area are sequentially in fluid communication; the sewage supply assembly is in fluid communication with the water intake zone and the header tank is in fluid communication with the water outlet zone. The utility model provides a permeable reactive wall testing arrangement can simulate three-dimensional underground water flow condition, can the osmotic coefficient and the operation effect of accurate determination permeable reactive wall actual motion in-process.
Description
Technical Field
The utility model belongs to the technical field of permeable reactive barrier technique and specifically relates to a permeable reactive barrier testing arrangement is related to.
Background
Permeable reactive barrier (permeable reactive barrier) technology is used as an underground water in-situ treatment means, and in engineering application, pollutants in underground water are adsorbed, chemically reacted and precipitated and the like and are continuously accumulated on the surface and inside of a wall body, so that the wall body is saturated, and even the activity is lost due to blockage. Along with the continuous accumulation of pollutants, the pore structure of the PRB medium material is changed, so that the permeability coefficient of the PRB medium material is reduced, and the service life of the PRB is influenced. When the permeability coefficient of the PRB material is tested, because underground water flow under real conditions is difficult to simulate, the permeability coefficient and the operation effect in the PRB operation process are difficult to accurately measure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a permeable reactive wall testing arrangement can simulate the groundwater flow condition and realize the survey to permeable reactive wall performance.
In a first aspect, the utility model provides a permeable reactive barrier testing arrangement, include: a test vessel, a sewage supply assembly and a header tank;
a partition is arranged in the test container, the partition partitions an inner cavity of the test container to form a water inlet area, a aquifer medium area, a permeable reaction wall simulation area and a water outlet area, and the water inlet area, the aquifer medium area, the permeable reaction wall simulation area and the water outlet area are sequentially in fluid communication;
the sewage supply assembly is in fluid communication with the intake zone and the header tank is in fluid communication with the outtake zone.
With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the permeable reactive barrier testing apparatus further includes: the water inlet pressure measuring pipe and the water outlet pressure measuring pipe are arranged on the water inlet pipe;
the water inlet pressure-measuring pipe is installed at one end, close to the aquifer medium area, of the permeable reactive wall simulation area, and the water outlet pressure-measuring pipe is installed at one end, close to the water outlet area, of the permeable reactive wall simulation area.
In combination with the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the separator includes a partition plate, and the partition plate is provided with a plurality of through holes arranged at intervals.
In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein a metal mesh is attached to the partition board, and gauze is laid on the metal mesh.
In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the test container is provided with a plurality of water outlet valves, a plurality of which are arranged at intervals from bottom to top, and a plurality of which are communicated with the water outlet zone respectively.
In combination with the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the test container is provided with a water outlet valve, and the water outlet valve is installed at the top of the water outlet area.
With reference to the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein the sewage supply assembly includes: a sump tank in fluid communication with the water pump, and a water pump in fluid communication with the intake area.
In combination with the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein the test container is provided with a sampling hole, the sampling hole is located the permeable reactive wall simulation area is close to the one end of the water outlet area, and the sampling hole is communicated with the permeable reactive wall simulation area.
With reference to the seventh possible implementation manner of the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the sewage supply assembly: the bottom of the water inlet bottle is in fluid communication with the water inlet area, the air outlet of the air compressor is in fluid communication with the top of the water inlet bottle, and the pressure regulating valve is installed between the air compressor and the water inlet bottle.
In combination with the first aspect, the present invention provides a ninth possible implementation manner of the first aspect, wherein the test container is provided with a sampling hole, the sampling hole is located the permeable reactive wall simulation area is close to the one end of the water outlet area, just the sampling hole with the permeable reactive wall simulation area is communicated.
The embodiment of the utility model provides a following beneficial effect has been brought: the three-dimensional underground water flow condition can be simulated, and the permeability coefficient and the operation effect of the permeable reactive wall can be accurately measured. The permeable reactive barrier testing device can reflect the change of underground water flow caused by the blockage of the PRB material, and more truly reflect the scene of PRB field operation, thereby being more beneficial to guiding PRB engineering application.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a first testing apparatus for permeable reactive barrier according to an embodiment of the present invention;
fig. 2 is a schematic view of a second testing apparatus for permeable reactive barrier according to an embodiment of the present invention;
fig. 3 is a schematic view of a third testing apparatus for permeable reactive barrier according to an embodiment of the present invention.
Icon: 100-a test container; 101-a water inlet area; 102-an aqueous medium zone; 103-a permeable reactive wall simulation zone; 104-water outlet area; 110-a separator; 111-a first separator; 112-a second separator; 113-a third separator; 200-a sewage supply assembly; 210-a waste water tank; 220-a water pump; 230-water inlet bottle; 240-air compressor; 250-pressure regulating valve; 300-a water collecting tank; 400-water inlet piezometer tube; 500-water outlet pressure measuring pipe; 600-a water outlet valve; 700-overflow pipe.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1, the embodiment of the present invention provides a testing apparatus for permeable reactive barrier, including: a test container 100, a sewage supply assembly 200, and a header tank 300;
a partition 110 is arranged in the test container 100, the partition 110 partitions the inner cavity of the test container 100 into a water inlet area 101, an aquifer medium area 102, a permeable reaction wall simulation area 103 and a water outlet area 104, and the water inlet area 101, the aquifer medium area 102, the permeable reaction wall simulation area 103 and the water outlet area 104 are sequentially in fluid communication;
the sewage supply assembly 200 is in fluid communication with the intake zone 101 and the header tank 300 is in fluid communication with the outtake zone 104.
Specifically, the wastewater supply module 200 supplies wastewater into the influent region 101, the wastewater flows from the influent region 101 through the aquifer medium region 102 and the osmotic reaction wall simulation region 103 in sequence into the effluent region 104, and the water discharged from the effluent region 104 is supplied to the header tank 300. Both the aquifer media zone 102 and the permeable reactive wall simulation zone 103 may be used to house the PRB media material. The sewage flows in the test container 100, so that three-dimensional underground water flow can be simulated, and the permeability coefficient and the operation effect of the permeable reactive barrier can be accurately measured.
When the permeable reactive barrier is tested, sewage is firstly introduced into the water inlet area 101, the constant water head of the water inlet area 101 is kept, the water outlet speed of the water outlet area 104 is controlled, and the water flow speed in the test container 100 is ensured to meet the set underground water flow speed. Under the condition that the water flow speed meets the simulation requirement, sewage is introduced into the water inlet area 101, the concentration of pollutants in water is detected by sampling at one end of the permeable reactive wall simulation area 103 close to the water outlet area 104 according to a certain time interval, and the permeability coefficient is calculated according to the volume of the water in the water collection tank 300.
The embodiment of the utility model provides an in, infiltration reaction wall testing arrangement still includes: the water inlet pressure measuring pipe 400 and the water outlet pressure measuring pipe 500;
the inlet pressure-measuring pipe 400 is installed at one end of the permeable reactive wall simulation zone 103 close to the aquifer medium zone 102, and the outlet pressure-measuring pipe 500 is installed at one end of the permeable reactive wall simulation zone 103 close to the outlet zone 104.
Specifically, the water inlet pressure-measuring tube 400 is used for detecting the water head scale H at the water inlet end of the permeable reactive wall simulation area 103, and the water outlet pressure-measuring tube 500 is used for detecting the water head scale H at the water outlet end of the permeable reactive wall simulation area 103.
Further, the partition 110 includes a partition plate on which a plurality of through holes are formed at intervals. Wherein, the separator 110 includes: the test container comprises a first partition plate 111, a second partition plate 112 and a third partition plate 113, wherein the first partition plate 111, the second partition plate 112 and the third partition plate 113 are respectively installed in the test container 100, an aquifer medium area 102 is formed between the first partition plate 111 and the second partition plate 112, a permeable reaction wall simulation area 103 is formed between the second partition plate 112 and the third partition plate 113, a water inlet area 101 is formed on the side of the first partition plate 111, which is far away from the second partition plate 112, and a water outlet area 104 is formed on the side of the third partition plate 113, which is far away from the second partition plate 112.
Specifically, the partition plate is made of machine glass, the diameter of the through hole is 10 mm-20 mm, and sewage can flow through the through hole from the water inlet area 101 to the aquifer medium area 102, the permeable reactive wall simulation area 103 and the water outlet area 104 in sequence.
Furthermore, a metal net is attached to the partition board, and gauze is laid on the metal net.
Wherein, the aperture of the gauze is smaller than the radial dimension of the aquifer medium and the PRB medium material, thereby ensuring that the partition 110 can separate and store the aquifer medium and the PRB medium material in the aquifer medium area 102 and the permeable reactive wall simulation area 103.
In the first testing apparatus for osmotic reaction wall, the testing container 100 is installed with a plurality of outlet valves 600, the outlet valves 600 are arranged from bottom to top at intervals, and the outlet valves 600 are respectively communicated with the outlet zone 104.
Specifically, the outlet valves 600 at different elevations are opened to control the outlet valves 600, the flow rate and flow rate of the groundwater are selected to meet the set conditions, and the opened outlet valves 600 are used as the outlets.
As shown in FIGS. 2 and 3, in the second and third types of osmotic reaction wall test units, the test vessel 100 is provided with a water outlet valve 600, and the water outlet valve 600 is installed at the top of the water outlet zone 104. When the outlet area 104 is full of water, the water in the outlet area 104 can be discharged through the outlet valve 600, so that the water level in the test container 100 can be always kept in a high water level state, and the water passing section is constant, that is, the water passing section is always full of water.
As shown in fig. 1, the test vessel 100 is equipped with an overflow pipe 700, and the overflow pipe 700 communicates with the water inlet region 101.
The overflow pipe 700 is installed at a sidewall of the water inlet region 101, and when the liquid level in the water inlet region 101 reaches the height position of the overflow pipe 700, the water in the water inlet region 101 can be discharged through the overflow pipe 700, thereby maintaining the constant head of the water inlet region 101.
In the first type of the osmotic reaction wall testing apparatus, the wastewater supply module 200 includes: a sump 210 and a water pump 220, the sump 210 being in fluid communication with the water pump 220, the water pump 220 being in fluid communication with the intake area 101.
Specifically, when the water pump 220 is activated, the water pump 220 pumps the sewage in the sewage tank 210 to flow into the water inlet area 101 along the pipeline.
As shown in fig. 2, in the second testing apparatus for permeable reactive barrier, the sewage tank 210 adopts a liftable water tank, and the height difference between the sewage tank 210 and the water inlet area 101 is changed by adjusting the height of the sewage tank 210, so as to adjust the water pressure of the water entering the water inlet area 101.
As shown in fig. 3, in the third type of the osmotic reaction wall test apparatus, the wastewater supply module 200 includes: a water inlet bottle 230, an air compressor 240 and a pressure regulating valve 250, wherein the bottom of the water inlet bottle 230 is in fluid communication with the water inlet region 101, the air outlet of the air compressor 240 is in fluid communication with the top of the water inlet bottle 230, and the pressure regulating valve 250 is installed between the air compressor 240 and the water inlet bottle 230. The pressure of the water introduced into the water inlet bottle 230 is adjusted by the pressure adjusting valve 250, and the pressure of the water in the water inlet bottle 230 is applied to the water inlet region 101 by the pressure of the water, so that the pressure of the water flowing into the water inlet region 101 can be adjusted.
As shown in fig. 1, 2 and 3, the test container 100 is provided with a sampling hole, which is located at one end of the permeable reactive wall simulation zone 103 near the water outlet zone 104 and is communicated with the permeable reactive wall simulation zone 103.
Specifically, the water in the permeable reactive wall simulation zone 103 can be sampled through the sampling holes, and in order to avoid the dominant flow caused by the boundary effect of the sampled water, a puncture needle with the length of 10cm is inserted into each sampling hole.
As shown in fig. 1, 2 and 3, the method for testing the permeable reactive barrier adopts a permeable reactive barrier testing device and comprises the following steps:
placing an aquifer medium into an aquifer medium area 102, and placing a permeable reaction medium into a permeable reaction wall simulation area 103;
introducing sewage into the water inlet area 101;
recording the flow of the water outlet end of the water outlet area 104 according to a preset time interval;
and sampling and detecting the concentration of the pollutants at the water outlet of the permeable reactive wall simulation area 103 according to a preset time interval.
In the osmotic reaction wall test method, a top cover of a test container 100 is opened, a specific aqueous layer medium is uniformly placed in an aqueous layer medium region 102 according to the requirement of a test, an osmotic reaction medium is placed in an osmotic reaction wall simulation region 103, and the top cover is covered on the test container 100.
When the apparatus for testing a permeable reactive wall shown in fig. 1 is used, the sewage in the sewage tank 210 is pumped by the water pump 220 and flows into the water inlet area 101 along the pipeline.
When the apparatus for testing a permeable reactive wall shown in fig. 2 is used, the waste water tank 210 is configured as a lifting water tank, and the water pressure entering the water inlet area 101 is adjusted by adjusting the height of the lifting water tank.
When the apparatus for testing a permeable reactive barrier shown in fig. 3 is used, compressed air is introduced into the water inlet bottle 230 through the air compressor 240, water in the water inlet bottle 230 is pressed into the water inlet region 101 through air pressure, and the adjustment of the water inlet pressure is realized by adjusting the pressure regulating valve 250.
As shown in fig. 1, the outlet valve 600 with different levels is opened to control the outlet head and select the opening state of the outlet valve 600 according with the set ground water flow rate and flow rate. Keeping the opening state of the water outlet valve 600 under the conditions of the set groundwater flow speed and the set flow rate, opening the top cover of the test container 100, clearing the aquifer medium in the aquifer medium area 102 and the permeable reactive wall simulation area 103, placing PRB medium materials with certain types and proportions into the permeable reactive wall simulation area 103, and covering the top cover of the test container 100. And opening the selected water outlet valve 600, starting the water pump 220, injecting the sewage into the water inlet area 101, keeping a constant water head at the water inlet position, recording the flow value of a flowmeter at the water outlet valve 600, and sampling and detecting the concentration of pollutants in the water sample at a sampling hole according to a certain time interval. The test monitoring results are given in the following table:
in an embodiment of the present invention, the method for testing the permeable reactive barrier further includes: and sampling and detecting the concentration of the pollutants at the water outlet of the permeable reactive wall simulation area 103 according to a preset time interval. Wherein, can be used to detect the pollutant concentration of infiltration reaction wall simulation area 103 department of giving water out at the sampling hole sample, and the experiment is carried out until the pollutant concentration of sampling hole department no longer lasts the reduction, and A is PRB cross sectional area in the upper table, and B is PRB thickness.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A permeable reactive wall testing device, comprising: a test container (100), a sewage supply assembly (200) and a header tank (300);
a partition (110) is arranged in the test container (100), the partition (110) partitions an inner cavity of the test container (100) to form a water inlet area (101), a aquifer medium area (102), a permeable reactive wall simulation area (103) and a water outlet area (104), and the water inlet area (101), the aquifer medium area (102), the permeable reactive wall simulation area (103) and the water outlet area (104) are sequentially in fluid communication;
the sewage supply assembly (200) is in fluid communication with the water intake zone (101) and the water collection tank (300) is in fluid communication with the water outlet zone (104).
2. The permeable reactive wall testing device according to claim 1, further comprising: the water inlet pressure measuring pipe (400) and the water outlet pressure measuring pipe (500);
the water inlet pressure measuring pipe (400) is installed at one end, close to the aquifer medium area (102), of the permeable reactive wall simulation area (103), and the water outlet pressure measuring pipe (500) is installed at one end, close to the water outlet area (104), of the permeable reactive wall simulation area (103).
3. The permeable reactive wall testing device according to claim 1, wherein the partition (110) comprises a partition plate, and a plurality of through holes are formed in the partition plate at intervals.
4. The permeable reactive barrier testing device of claim 3, wherein a metal net is attached to the partition plate, and gauze is laid on the metal net.
5. The permeable reactive wall testing apparatus according to claim 1, wherein the testing container (100) is installed with a plurality of outlet valves (600), the plurality of outlet valves (600) are spaced from bottom to top, and the plurality of outlet valves (600) are respectively communicated with the outlet zone (104).
6. The permeable reactive wall testing apparatus according to claim 1, wherein the testing container (100) is installed with a water outlet valve (600), and the water outlet valve (600) is installed at the top of the water outlet zone (104).
7. The permeable reactive wall testing device according to claim 1, wherein the testing container (100) is provided with an overflow pipe (700), and the overflow pipe (700) is communicated with the water inlet area (101).
8. The permeable reactive wall testing apparatus according to claim 1, wherein the sewage supply module (200) comprises: a sump (210) and a water pump (220), the sump (210) being in fluid communication with the water pump (220), the water pump (220) being in fluid communication with the water intake zone (101).
9. The permeable reactive wall testing apparatus according to claim 1, wherein the sewage supply module (200) comprises: a water inlet bottle (230), an air compressor (240) and a pressure regulating valve (250), the bottom of the water inlet bottle (230) being in fluid communication with the water inlet region (101), the air outlet of the air compressor (240) being in fluid communication with the top of the water inlet bottle (230), the pressure regulating valve (250) being mounted between the air compressor (240) and the water inlet bottle (230).
10. The permeable reactive wall testing device according to claim 1, wherein the testing container (100) is provided with a sampling hole, the sampling hole is positioned at one end of the permeable reactive wall simulating zone (103) close to the water outlet zone (104), and the sampling hole is communicated with the permeable reactive wall simulating zone (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571816.5U CN214408609U (en) | 2021-03-19 | 2021-03-19 | Infiltration reaction wall testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571816.5U CN214408609U (en) | 2021-03-19 | 2021-03-19 | Infiltration reaction wall testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214408609U true CN214408609U (en) | 2021-10-15 |
Family
ID=78029646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120571816.5U Active CN214408609U (en) | 2021-03-19 | 2021-03-19 | Infiltration reaction wall testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214408609U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816393A (en) * | 2021-03-19 | 2021-05-18 | 矿冶科技集团有限公司 | Permeable reactive barrier testing device and permeable reactive barrier testing method |
-
2021
- 2021-03-19 CN CN202120571816.5U patent/CN214408609U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816393A (en) * | 2021-03-19 | 2021-05-18 | 矿冶科技集团有限公司 | Permeable reactive barrier testing device and permeable reactive barrier testing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6938461B1 (en) | Constant-head soil permeameter for determining the hydraulic conductivity of earthen materials at a wide range of depths | |
| US10823720B2 (en) | Deep soil water percolation monitor and monitoring method therefor | |
| CN203772699U (en) | Three-dimensional penetration siltation simulated test device of dam foundation soil body | |
| CN105547955A (en) | Obstruction testing method for soil permeability under constant flow velocity | |
| EP1224438A1 (en) | Device and method for measuring fluid and solute fluxes in flow systems | |
| CN108332816B (en) | Device and method for measuring exchange water quantity of surface water and underground water of river channel | |
| CN108801880B (en) | Test device and test method for clogging and constant head permeation | |
| CN214408609U (en) | Infiltration reaction wall testing arrangement | |
| KR20090020392A (en) | Penetrability test apparatus for variable water level | |
| CN209069798U (en) | A kind of darcy permeability test instrument | |
| CN211453281U (en) | Large granule material penetrant unit | |
| CN112816393A (en) | Permeable reactive barrier testing device and permeable reactive barrier testing method | |
| JP2023126737A (en) | Fluid sampling device | |
| CN115754248B (en) | Diving-soil moisture movement tracing experimental device and method based on radon isotope under freezing condition | |
| CN207882118U (en) | Measure the experimental rig of the long-term water permeability of pervious concrete | |
| CN115598040A (en) | Device and method for measuring two-way permeability coefficient of pore medium | |
| CN212459328U (en) | Confined aquifer solute transport experimental device | |
| CN110987363B (en) | Test system for simulating deformation and damage of top plate of aquifer caused by recharging well water | |
| CN211527944U (en) | Water quality monitoring preprocessing device and water quality monitoring system | |
| CN212321396U (en) | Suspended solid blocking experiment device | |
| CN112414773A (en) | System for monitoring nitrogen and phosphorus leaching loss of field soil and working method thereof | |
| CN111812011A (en) | Suspended solid blocking experiment device | |
| CN214749648U (en) | Steel slag concrete permeability measuring device | |
| CN113720978B (en) | River sea-entering simulation device and simulation analysis method | |
| CN219551597U (en) | Gas collecting and water draining metering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |