CN210981890U

CN210981890U - In-situ enrichment water phosphate continuous sampling device

Info

Publication number: CN210981890U
Application number: CN201921966446.4U
Authority: CN
Inventors: 王敬富; 刘勇; 陈敬安; 丁士明; 金祖雪; 王燕
Original assignee: Institute of Geochemistry of CAS
Current assignee: Institute of Geochemistry of CAS
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-07-10
Anticipated expiration: 2029-11-14

Abstract

The utility model discloses a continuous sampling device of in-situ enriched water phosphate, which belongs to an environmental protection monitoring device. The device comprises an adsorption membrane positioned in a sampling box; the sampling box consists of an outer box and an inner box positioned in the outer box, the outer box consists of an outer box body and an outer box cover, and a plurality of large through holes are distributed on the surface of the outer box; the inner box consists of an inner box body and an inner box cover, and a plurality of small through holes are distributed on the surface of the inner box; the adsorption membrane is positioned in the inner box through a clamping device, the clamping device is composed of two frames, nylon screens fixed on the surfaces of the frames and bolts clamping the two frames, and the adsorption membrane is positioned between the two nylon screens. The utility model can avoid large-volume sampling and accurately reflect the dynamic change information of water phosphate.

Description

In-situ enrichment water phosphate continuous sampling device

Technical Field

The utility model relates to a water phosphate sampling device especially relates to a continuous sampling device of normal position enrichment water phosphate, belongs to environmental protection monitoring devices.

Background

Phosphate is a key pollutant causing eutrophication of water bodies such as rivers, lakes and reservoirs and the like. The water body phosphate source comprises exogenous industrial and agricultural wastewater, domestic sewage, atmospheric dry and wet precipitation and the like, and also comprises endogenous biological residue degradation, sediment phosphorus release and the like. Different phosphate source types and input levels are constantly changing dynamically to produce different environmental effects. Oxygen isotope of phosphate salt: (¹⁸O_P) The trace element has gradually attracted wide attention as a novel effective tracing tool, and is applied to the source analysis of phosphorus in water environment and the biogeochemical research thereof.

Monitoring the phosphate oxygen isotope(s) in the water¹⁸O_P) The phosphate in the water to be measured must be converted into high-purity and stable Ag₃PO₄Fixing the sample, and then testing Ag by EA-IRMS high-temperature pyrolysis method₃PO₄In (1)¹⁸O_P. At present, a container is generally used for collecting raw water to enrich PO required by test₄The method has the defects of complex operation, time and labor waste and the like:

1) PO in natural water body₄The content is low, and a large amount of raw water needs to be collected to enrich and achieve the PO test₄The required amount, the water collection workload and the cost are high.

2) The method needs complicated process operations such as filtration, impurity removal, passive phosphorus concentration and the like on raw water, and is easy to cause phosphorus loss.

3) The raw water collection process is instantaneous sampling, and the obtained result¹⁸O_PConstituting a representation of a time¹⁸O_PThe composition information has certain randomness, so that the dynamic change information of the phosphate in the raw water is difficult to accurately reflect.

4) Impurities such as soluble organic matter DOM, various anions/cations and the like in raw water can be strictHeavy interference¹⁸O_PThe purification operation and the test analysis need to be completely removed, otherwise the operation will affect¹⁸O_PAnd testing the accuracy of the result. But do not¹⁸O_PThe separation and purification operation is a series of sequential and complicated multi-step impurity removal and PO₄The extraction process not only consumes a great deal of time and reagent materials, but also easily causes low phosphorus recovery rate and oxygen isotope fractionation, and finally leads to Ag₃PO₄The error of the sample result is large.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a continuous sampling device for in-situ enriched water phosphate.

In order to achieve the above purpose, the utility model adopts the following technical scheme: it comprises an adsorption membrane positioned in the sampling box; the sampling box is composed of an outer box standing on the side and an inner box standing on the side and fixed in the outer box, the outer box is composed of an outer box body and an outer box cover, and a plurality of large through holes are distributed on the surfaces of the outer box body and the outer box cover; the inner box consists of an inner box body and an inner box cover, and a plurality of small through holes are distributed on the surfaces of the inner box body and the inner box cover; the adsorption membrane is laterally arranged in the inner box through a clamping device, the clamping device is composed of two frames, nylon screens respectively fixed on the surfaces of the frames, and at least two bolts clamping the two frames, and the adsorption membrane is positioned between the two nylon screens.

A plurality of upward-protruding supporting ribs are distributed at the box bottom of the outer box body, first positioning ribs are distributed on the periphery of the inner wall of the outer box body, and a plurality of downward-protruding first pressing ribs are distributed at the top of the outer box cover; the periphery of the inner wall of the inner box body is provided with second positioning ribs, and the top of the inner box cover is provided with a plurality of second pressing ribs protruding downwards; two opposite side surfaces of the outer box body are respectively fixed with a hanging ring, wherein one hanging ring is connected with the floating ball through a cable, and the other hanging ring is connected with the counterweight body through another cable; the mesh number of the nylon screen is 40 meshes, the mesh number of the small through holes on the surface of the inner box is 16 meshes, and the mesh number of the large through holes on the surface of the outer box is 5 meshes.

The adsorption membrane in the technical scheme is a circular zirconia gel membrane.

Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:

1) the preferential order of the zirconium oxide gel film for adsorbing water ions is that P is more than or equal to SO₄ ^2-＞Cl^-＞Ca²⁺、K⁺、Na⁺The adsorption selectivity is slightly influenced by factors such as the pH value of a water body, impurity ions and the like; therefore, the method adopts the in-situ continuous enrichment mode to adsorb enough phosphate to meet the requirement of in-situ continuous enrichment¹⁸O_PThe requirement of the test can completely avoid the condition that the traditional method needs to collect a large amount of raw water to enrich enough PO required by the test₄The water collecting workload is greatly reduced.

2) Because the mode of in-situ continuous phosphate enrichment is adopted, the obtained water body¹⁸O_PThe composition reflects that the water body in a time period¹⁸O_PAverage information of composition; can obtain water bodies with different time scales such as day, week, ten days, month and the like¹⁸O_PThe composition can be further used for researching natural water bodies of lakes, reservoirs, oceans, typical phosphorus-polluted areas and the like at different time scales¹⁸O_PDynamic variation of composition.

3) Because the zirconia gel film has high selectivity to phosphate adsorption, the zirconia gel film can effectively remove most impurities in the water body in the enrichment process, thereby greatly reducing the difficulty of subsequent purification treatment and simplifying the purification steps. The whole process is simple and convenient to operate, complex equipment and reagent materials are not needed, and the cost is low.

4) The adsorption membrane is positioned in the sampling box through the nylon screen clamping device, so that the adsorption membrane can be prevented from being folded, damaged or lost, and the positioning of the sampling box in a water body is facilitated.

5) The sampling box adopts the combined structure of the outer box and the inner box, so that the impurities in the water body can be filtered in a grading way.

In conclusion, the utility model can effectively avoid large-volume sampling, greatly reduce the difficulty of the steps of filtering, removing impurities and the like, and save time and cost; and can accurately reflect the dynamic change information of the phosphate in the water body.

Drawings

FIG. 1 is a schematic diagram of the operation of the present invention;

FIG. 2 is a schematic view of the cartridge of the present invention;

FIG. 3 is a schematic sectional view of the cartridge of the present invention;

FIG. 4 is a schematic structural view of the adsorption sheet holding device of the present invention;

FIG. 5 is a schematic view of the structure of the outer casing of the present invention;

FIG. 6 is a schematic view of the structure of the outer case cover of the present invention;

FIG. 7 is a schematic view of the structure of the inner box body of the present invention;

fig. 8 is a schematic view of the structure of the inner box cover of the present invention.

In the figure: the floating ball type cable fixing device comprises a floating ball 1, a cable 2, an outer box 3, an outer box body 3-1, a large through hole 3-2, an outer box cover 3-3, a supporting rib 3-4, a first pressing rib 3-5, a first positioning rib 3-6, a hanging ring 4, a counterweight body 5, an inner box 6, an inner box body 6-1, a small through hole 6-2, an inner box cover 6-3, a second pressing rib 6-4, a second positioning rib 6-5, a clamping device 7, a nylon screen 7-1, a frame 7-2, a bolt 7-3 and an adsorption membrane 8.

Detailed Description

The invention will be further described with reference to the following drawings and specific examples:

as shown in FIGS. 1 to 8, the sampling box is composed of an outer box 3 standing on one side and an inner box 6 fixed on one side in the outer box. Wherein, the outer box 3 is composed of an outer box body 3-1 and an outer box cover 3-3 which tightly closes the outer box body, the surfaces of the outer box body 3-1 and the outer box cover 3-3 are respectively distributed with a plurality of large through holes 3-2, the mesh number of the large through holes is 5 meshes; the inner box 6 consists of an inner box body 6-1 and an inner box cover 6-3 which tightly closes the inner box body, and a plurality of small through holes 6-2 with 16 meshes are distributed on the surfaces of the inner box body 6-1 and the inner box cover 6-3. The adsorption membrane 8 is fixed in the inner box 6 through a clamping device 7 in a side standing mode, the clamping device 7 is composed of two frames 7-2, nylon screens 7-1 fixed on the surfaces of the frames 7-2 respectively, and two bolts 7-3 clamping the two frames 7-2, and the circular adsorption membrane 8 is located between the two nylon screens 7-1.

In order to avoid the inner box 6 positioned in the outer box 3 from blocking the large through hole 3-2 and simultaneously increase the strength and the rigidity, a plurality of upward convex supporting ribs 3-4 are distributed at the bottom of the outer box body 3-1; similarly, in order to avoid the blockage of the large through hole 3-2 on the outer box cover 3-3 and to press the inner box 6 and avoid the shaking, a plurality of first pressing ribs 3-5 protruding downwards are distributed on the top of the outer box cover 3-3.

Similarly, in order to avoid the frame 7-2 from blocking the small through hole 6-2 on the side surface of the inner box body 6-1 and to increase the strength and rigidity, second positioning ribs 6-5 are distributed on the periphery of the inner wall of the inner box body 6-1; similarly, in order to press the frame 7-2 and avoid shaking, a plurality of second pressing ribs 6-4 protruding downwards are distributed on the top of the inner box cover 6-3.

In order to fix the floating ball 1 and the counterweight body 5, two opposite side surfaces of the outer box body 3-1 are respectively fixed with a hanging ring 4; one of the rings 4 is connected with the floating ball 1 through a cable 2, and the other ring 4 is connected with the counterweight body 5 through the other cable 2.

During the use, in order to realize the phosphate of the different degree of depth water samples of synchronous collection section, usable many hawsers 2 will be equipped with a plurality of inside sampling boxes that adsorb diaphragm 8 and establish ties in proper order, at the one end fixed connection floater 1 of hawser 2, at the other end fixed connection counter weight body 5 of hawser 2.

Claims

1. An in-situ enriched water phosphate continuous sampling device comprises an adsorption membrane positioned in a sampling box; the method is characterized in that: the sampling box is composed of an outer box (3) standing on the side and an inner box (6) standing on the side and fixed in the outer box, the outer box (3) is composed of an outer box body (3-1) and an outer box cover (3-3), and a plurality of large through holes (3-2) are distributed on the surfaces of the outer box body (3-1) and the outer box cover (3-3); the inner box (6) consists of an inner box body (6-1) and an inner box cover (6-3), and a plurality of small through holes (6-2) are distributed on the surfaces of the inner box body (6-1) and the inner box cover (6-3); the adsorption membrane (8) is laterally arranged in the inner box (6) through a clamping device (7), the clamping device (7) is composed of two frames (7-2), nylon screens (7-1) respectively fixed on the surfaces of the frames (7-2) and at least two bolts (7-3) clamping the two frames (7-2), and the adsorption membrane (8) is positioned between the two nylon screens (7-1).

2. The in-situ enriched water phosphate continuous sampling device according to claim 1, wherein: a plurality of upwards-raised supporting ribs (3-4) are distributed at the box bottom of the outer box body (3-1), first positioning ribs (3-6) are distributed on the periphery of the inner wall of the outer box body (3-1), and a plurality of downwards-raised first pressing ribs (3-5) are distributed at the top of the outer box cover (3-3).

3. The in-situ enriched water phosphate continuous sampling device according to claim 1, wherein: second positioning ribs (6-5) are distributed on the periphery of the inner wall of the inner box body (6-1), and a plurality of second pressing ribs (6-4) protruding downwards are distributed on the top of the inner box cover (6-3).

4. The in-situ enriched water phosphate continuous sampling device according to claim 1, wherein: two opposite side surfaces of the outer box body (3-1) are respectively fixed with a hanging ring (4), one hanging ring (4) is connected with the floating ball (1) through a cable (2), and the other hanging ring (4) is connected with the counterweight body (5) through the other cable (2).

5. The in-situ continuous phosphate sampling device for the enriched water body according to any one of claims 1 to 4, wherein: the mesh number of the nylon screen (7-1) is 40 meshes, the mesh number of the small through holes (6-2) on the surface of the inner box (6) is 16 meshes, and the mesh number of the large through holes (3-2) on the surface of the outer box (3) is 5 meshes.