CN217156044U

CN217156044U - Sampling device for in-situ enrichment of phosphate in water body

Info

Publication number: CN217156044U
Application number: CN202220942137.9U
Authority: CN
Inventors: 易容; 纪玲玲; 陈学礼; 杜超; 李松涛; 高逊; 宋爱文
Original assignee: Gannan Normal University
Current assignee: Gannan Normal University
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-09
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses a sampling device for in-situ enrichment of phosphate in water, which comprises a sampling container, wherein the sampling container is cylindrical, organic polymer adsorption materials are filled in the sampling container, and sieve-hole-type channels are formed at both ends of the cylinder of the sampling container; the water inlet end of the sampling container is connected with a water inlet bin, a water inlet joint is arranged on a shell of the water inlet bin, and the water inlet bin has a structure forming spiral ascending water flow; preferably, the water outlet end of the sampling container is connected with a water outlet bin; the top of the water inlet bin and the bottom of the water outlet bin are provided with sieve pores. The utility model has the advantages that the organic polymer adsorption material filled in the round container forms an adsorption column, thereby greatly increasing the enrichment capacity; the water body can be forced to flow through the sampling device by using a water pump to be enriched into enough phosphate required by the oxygen isotope test in the water sample, and the water sample with a set amount can be obtained within a set time; and the macromolecule adsorption material is convenient to fill and withdraw, the device has compact structure, light weight and convenient operation.

Description

Sampling device for in-situ enrichment of phosphate in water body

Technical Field

The utility model relates to a sampling technique of phosphate in the water, concretely relates to a sampling device that is arranged in normal position enrichment water phosphate.

Background

Since the 20 th century, with the rapid development of economy, industry and agriculture, human activities cause water environment resources to encounter a series of problems, wherein the problem of water eutrophication is particularly prominent. Wherein, the phosphate is a key pollutant causing eutrophication of water bodies in lakes, rivers, reservoirs and other areas. The water phosphate source comprises exogenous input such as industrial and agricultural wastewater, domestic sewage, surface runoff, atmospheric dry and wet sedimentation and the like, and also comprises endogenous biological residue degradation, sediment phosphorus release and the like. After the phosphate is input into the lake water body, a series of migration transformation such as adsorption/desorption, precipitation/dissolution, animal and plant absorption/transfer/release and the like occur, and the phosphate is output through the flow output of the lake and river, the artificial fishing, the plant harvesting and the like. The annual dynamics of different phosphate source types and input/output volumes can produce different environmental effects. The method is limited by a proper research means, has certain limitations depending on water chemistry characteristic analysis, hydrological models or radioactive isotope tracing, and is still very weak in the current research of tracing and migration of phosphorus. And phosphate oxygen isotope (delta) ¹⁸ O _p ) Has gradually attracted wide attention as a novel effective fingerprint tracing tool and is applied to the source analysis of phosphorus in water environmentAnd in the study of the biogeochemical cycle thereof.

To monitor the oxygen isotope (delta) of phosphate in a body of water ¹⁸ O _p ) The phosphate in the water body to be detected must be enriched, separated and purified and then converted into high-purity, stable and sufficient Ag ₃ PO ₄ Solid sample, then test Ag by high temperature pyrolysis-isotope ratio mass spectrometer (TC/EA-IRMS) ₃ PO ₄ Phosphate oxygen isotope (delta) of (1) ¹⁸ O _p ). The existing method generally collects tens to hundreds of liters of raw water at a certain time point by using a container so as to enrich PO required by the test ₄ The method comprises the steps of (1) measuring, intensively collecting and storing certain randomness, and difficultly accurately reflecting phosphate dynamic change information in raw water; the enrichment method generally adopts Mg (OH) ₂ -PO ₄ The coprecipitation method requires filtration of collected raw water, addition of reagent materials and the like, is complicated in operation process, adsorbs more interference factors such as soluble organic matters (DOM) during precipitation, is easy to cause low phosphate recovery rate, and increases oxygen isotope fractionation, thereby affecting delta ¹⁸ O _p And testing the accuracy of the result. For this reason, those skilled in the art have made efforts to develop a continuous sampling device for in-situ enrichment of phosphate in water by disposing an adsorption membrane sandwiched between two orifice plates in a box formed by the orifice plates, and after placing the box in a flowing water body, phosphate is enriched on the membrane during the flow of the water body through the membrane. However, the adsorption membrane is of a sheet structure, so that the enrichment capacity is limited, the time required for collecting the total phosphate required by the oxygen isotope detection is long, the area of the membrane needs to be increased or a plurality of sampling devices need to be adopted, the structure is heavy, and the adsorption membrane needs to be placed in a sampled water body during sampling, so that the sampling operation is inconvenient. For this reason, continued improvements are needed.

Disclosure of Invention

The utility model aims at solving the problems that the existing in-situ enrichment water phosphate continuous sampling device is limited in enrichment capacity, long in acquisition time and heavy in sampling time when meeting the requirement of total phosphate amount detected by oxygen isotope and is required to be arranged in a sampled water body to cause inconvenient sampling operation, and provides a sampling device for in-situ enrichment water phosphate, which is characterized in that a sampling container is set to be cylindrical and is filled with organic polymer adsorption material, so that the sampling device forms an adsorption column structure and the enrichment capacity is obviously increased; simultaneously, through setting up water supply connector to make the water force to flow through sampling device by joint connection water pump, greatly increased the sample water yield, utilize the adsorption column adsorption capacity to show the characteristic that increases, can enrich the required phosphate total amount of oxygen isotope detection, its compact structure, light in weight, and during the sampling, need not to put into by the sampling water sample, convenient operation.

In order to achieve the above purpose, the present invention adopts the following technical solution.

A sampling device for in-situ enrichment of phosphate in a water body comprises a sampling container, wherein the sampling container is cylindrical, an organic polymer adsorption material is filled in the sampling container, and sieve-hole-type channels are formed at two ends of a cylinder of the sampling container; the water inlet end of the sampling container is connected with a water inlet bin, a water inlet joint is arranged on a shell of the water inlet bin, and the water inlet bin is provided with a structure which enables water flow to spirally rise.

By adopting the technical scheme, the sampling container is arranged to be cylindrical, and the organic polymer adsorption material is filled in the container, so that the container forms an adsorption column structure, and the enrichment capacity is obviously increased; meanwhile, the water inlet joint is arranged, so that the water pump is connected by the joint to enable the water body to forcibly flow through the sampling device, the water volume of the sample can be greatly increased, the sampling time is effectively shortened, the total phosphate amount required by the oxygen isotope detection can be enriched by utilizing the characteristic that the adsorption capacity of the adsorption column is remarkably increased, and the device is compact in structure and light in weight; the sampling device can be placed on the shore for sampling, and only the water suction port of the water pump is required to be submerged into water at the sampling point, so that the corrosion can be effectively prevented, and the sampling operation is greatly improved. Of course, since the forced water flow does not affect the sampling result, the method is also suitable for the sampling form in water. Wherein, have the spiral rising rivers that form through the storehouse of intaking, can make organic polymer adsorption material suspension and fill the container to full play its enrichment characteristic.

Preferably, the water outlet end of the sampling container is connected with a water outlet bin, and a shell of the water outlet bin is provided with a water outlet joint; the sieve holes forming the sieve hole type channels are respectively arranged at the top of the water inlet bin and the bottom of the water outlet bin. The water outlet bin is used for forming water outlet buffering, so that the impact energy of flowing water is reduced, and the adsorption effect of the organic polymer adsorption material on phosphate is ensured.

Preferably, the water inlet bin and the water outlet bin are both in a circular container structure with holes sealed at two ends, and the bin bottom of the water inlet bin is formed by a disc-shaped base with the diameter larger than that of the bin body of the water inlet bin; and flange connection structures are adopted between the water inlet bin and the sampling container and between the water outlet bin and the sampling container. When putting sampling device at the bank and sampling, utilize disc base to form the stability support to the sampling container to utilize flange joint structure's connection convenience, improve the easy dismounting nature when sampling device loads and withdraws the adsorption material.

Preferably, the water outlet bin is composed of a buffering main bin and a slow flow pipeline, the lower end of the slow flow pipeline is connected with the sampling container, the upper end of the slow flow pipeline is inserted into the buffering main bin from the bin bottom of the buffering main bin, and the outlet of the slow flow pipeline is higher than the bin bottom of the buffering main bin by a set height. So as to slow down the flow rate of the outlet water by extending the outlet water channel.

Still further preferably, the outlet of the slow flow pipeline is zigzag or wavy in the circumferential direction of the pipe wall. To further slow down the flow by creating a head of effluent.

Further preferably, flanges forming the flange connection structure are welded and fixed on the peripheries of the cylinder walls at the two ends of the sampling container; the bottom of the water outlet bin and the top of the water inlet bin are both in circular hole plate structures, and a plurality of sieve holes are distributed on the circular hole plates; flanges forming the flange connection structures on the water outlet bin and the water inlet bin are positioned outside the corresponding bin top or the corresponding bin bottom and are respectively connected with the outer wall of the corresponding water outlet bin or the corresponding water inlet bin; or the flanges forming the flange connection structure on the water outlet bin and the water inlet bin are integrated with the corresponding cylinder top or cylinder bottom. So as to form various selectable structures, and the specific structural form can be conveniently selected according to the actual processing conditions.

Preferably, a sealing gasket is arranged between the joint surfaces of the flange connection, the sealing gasket is annular, a nylon screen is arranged in a circular hole in the middle of the sealing gasket, and the aperture of a mesh of the nylon screen is smaller than that of the mesh on the circular hole plate. So that the water sample can flow smoothly and the escape of the organic polymer adsorption material can be prevented.

Still more preferably, the mesh number of the nylon mesh is 100 meshes. Better form the protection to the loss of the organic polymer adsorption material.

Preferably, the structure enabling the water flow to spirally rise deviates from the circle center of the circular water inlet bin through the axis of the water inlet connector, and the pipe wall of the water inlet connector is tangent to the inner wall of the circular water inlet bin. So that the inflow water flow forms a vortex in the bin along the wall of the bin and then spirally rises, and the spirally rising water flow enables the organic polymer adsorbing material to be suspended and filled in the container.

Preferably, the polymeric adsorbent is composed of an anion exchange resin. The strong adsorption characteristic of the existing material to phosphate and the convenience of treatment before and after sampling are fully utilized to ensure that an ideal sampling result is obtained. Among them, the anion exchange resin is preferably a macroporous strongly basic styrene D201 resin.

The utility model has the advantages that the circular container is filled with the inner organic polymer adsorption material to form an adsorption column structure, thereby greatly increasing the adsorption capacity; the water pump is used for forcing the water to flow through the sampling device to be enriched to obtain sufficient phosphate required by the oxygen isotope test, and a water sample with a set amount can be obtained within a set time period so as to obtain more comprehensive analysis data; meanwhile, the organic polymer adsorption material is convenient to fill and withdraw, and the device is compact in structure, light in weight and convenient to sample and operate.

Drawings

Fig. 1 is a schematic perspective view of the structure of the present invention.

Fig. 2 is a schematic view of the position relationship between the middle water inlet joint and the circular water inlet bin.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited thereto.

Referring to fig. 1 and 2, a sampling device for in-situ enrichment of phosphate in a water body comprises a sampling container 1, wherein the sampling container 1 is cylindrical, an organic polymer adsorption material 2 is filled in the sampling container 1, and sieve-hole-type channels are formed at two ends of a cylinder of the sampling container 1; the end of intaking of sampling container 1 is connected with into water storehouse 3, is equipped with water supply connector 4 on the casing of storehouse 3 of intaking, is equipped with into water adjusting valve 4a on water supply connector 4, and storehouse 3 of intaking has the structure that makes rivers spiral shell screwing in rise, and this structure is by the skew circular centre of a circle of storehouse 3 of intaking of the axis of water supply connector 4, and the pipe wall of water supply connector 4 and the tangent formation of the storehouse inner wall of the circular shape storehouse 3 of intaking.

The polymer adsorbent 2 is made of an anion exchange resin, specifically, a macroporous strongly basic styrene-based D201 resin. The water outlet end of the sampling container 1 is connected with a water outlet bin 5, a shell of the water outlet bin 5 is provided with a water outlet connector 6, and the water outlet connector 6 is provided with a water outlet adjusting valve 6 a; the sieve holes forming the sieve hole type channels are respectively arranged at the top of the water inlet bin 3 and the bottom of the water outlet bin 5. The water inlet bin 3 and the water outlet bin 5 are both of circular container structures with holes sealed at two ends, and the bin bottom of the water inlet bin 3 is formed by a disc-shaped base 7 with the diameter larger than that of the bin body of the water inlet bin 3; the flange connection structure is adopted between the water inlet bin 3 and the sampling container 1 and between the water outlet bin 5 and the sampling container 1.

The water outlet bin 5 consists of a buffering main bin 5a and a slow flow pipeline 5b, the lower end of the slow flow pipeline 5b is connected with the sampling container 1, the upper end of the slow flow pipeline 5b is inserted into the buffering main bin 5a from the bin bottom of the buffering main bin 5a, and the outlet of the slow flow pipeline 5b is higher than the bin bottom of the buffering main bin 5a by a set height. The outlet of the slow flow pipeline 5b is in a sawtooth shape or a wave shape in the circumferential direction of the pipe wall.

Flanges 8 forming a flange connection structure are welded and fixed on the peripheries of the cylinder walls at the two ends of the sampling container 1; the bottom of the water outlet bin 5 and the top of the water inlet bin 3 are both circular hole plate structures, and a plurality of sieve pores are distributed on the circular hole plates; the flanges 8 which form the flange connection structures on the water outlet bin 5 and the water inlet bin 3 are positioned outside the corresponding bin top or the bin bottom and are respectively connected with the outer wall of the corresponding water outlet bin 5 or the outer wall of the corresponding water inlet bin 3.

A sealing gasket 9 is arranged between the joint surfaces of the flange connection, the sealing gasket 9 is in a circular ring shape, a nylon screen mesh 10 is arranged in a circular hole in the middle of the sealing gasket 9, and the mesh aperture of the nylon screen mesh 10 is smaller than that of a sieve mesh on a circular pore plate. The mesh number of the nylon screen mesh 10 is 100 meshes.

In this embodiment, the flanges forming the flange connection structures on the water outlet bin 5 and the water inlet bin 3 and the corresponding cylinder top or cylinder bottom can also be in an integral structure to replace the scheme of separate flanges.

In this embodiment, the outlet bin 5 can be made into a structure with a closed top or an open top.

When the sampling device of this embodiment is used, before the sampling, pass through flange 8, bolt and nut fixed connection with sampling container 1 and intake chamber 3 together, wherein, set up seal gasket 9 between the faying face of two flanges 8, install 100 mesh nylon screen 10 additional in seal gasket 9's middle part round hole. After the two are connected, the pretreated polymeric adsorbent material 2 is filled in the sampling container 1, either in a proper amount or fully. Then, the water outlet bin 5 is fixedly connected with the upper end of the sampling container 1 through a slow flow pipeline 5b section by a flange 8, a bolt and a nut, a sealing gasket 9 is arranged between the combination surfaces of the two flanges 8, and a nylon screen mesh 10 with 100 meshes is additionally arranged in a middle circular hole of the sealing gasket 9.

During sampling, the sampling device is arranged at the bank of a river, a reservoir or a lake of a water body to be sampled, is connected with a water pump through a water inlet joint 4, and pumps water by the water pump to force the sampled water to flow through the device. The flow can be detected through a flowmeter in the sampling process so as to count the total amount of the sampled water samples; the flow can be adjusted by adjusting the water inlet adjusting valve 4a or the water outlet adjusting valve 6a, so that a set amount of water samples can be collected within a set time, such as 1000L water samples collected within 24 hours.

After sampling is finished, the water outlet bin 5 is detached, the macromolecular adsorbing material 2 is taken out, and after post-treatment, the total content of phosphate in the total amount of the sampled water sample can be obtained.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A sampling device for in-situ enrichment of phosphate in a water body comprises a sampling container (1), and is characterized in that the sampling container (1) is cylindrical, an organic polymer adsorption material (2) is filled in the sampling container (1), and sieve-hole-type channels are formed in the top and bottom of the sampling container (1); the water inlet end of the sampling container (1) is connected with a water inlet bin (3), a water inlet joint (4) is arranged on a shell of the water inlet bin (3), and the water inlet bin (3) is provided with a structure which enables water flow to spirally rise.

2. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 1, characterized in that the water outlet end of the sampling container (1) is connected with a water outlet bin (5), and a water outlet joint (6) is arranged on the shell of the water outlet bin (5); the sieve holes forming the sieve hole type channels are respectively arranged at the top of the water inlet bin (3) and the bottom of the water outlet bin (5).

3. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 2, characterized in that the water inlet bin (3) and the water outlet bin (5) are both in a circular container structure with holes sealed at both ends, and the bin bottom of the water inlet bin (3) is formed by a disc-shaped base (7) with a diameter larger than that of the bin body of the water inlet bin (3); the flange connection structures are adopted between the water inlet bin (3) and the sampling container (1) and between the water outlet bin (5) and the sampling container (1).

4. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 3, wherein the water outlet bin (5) consists of a buffering main bin (5 a) and a slow flow pipeline (5 b), the lower end of the slow flow pipeline (5 b) is connected with the sampling container (1), the upper end of the slow flow pipeline (5 b) is inserted into the buffering main bin (5 a) from the bin bottom of the buffering main bin (5 a), and the outlet end of the slow flow pipeline (5 b) is higher than the bin bottom of the buffering main bin (5 a) by a set height.

5. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 4, characterized in that the outlet end of the slow flow pipeline (5 b) is zigzag or wavy in the circumferential direction of the pipe wall.

6. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 3, characterized in that flanges (8) forming the flange connection structure are welded and fixed to the peripheries of the cylinder walls at both ends of the sampling container (1); the bottom of the water outlet bin (5) and the top of the water inlet bin (3) are both in circular hole plate structures, and a plurality of sieve holes are distributed on the circular hole plates; flanges (8) forming the flange connection structures on the water outlet bin (5) and the water inlet bin (3) are positioned outside the corresponding bin top or the bin bottom and are respectively connected with the outer wall of the corresponding water outlet bin (5) or the corresponding water inlet bin (3); or the flanges forming the flange connection structure on the water outlet bin (5) and the water inlet bin (3) and the corresponding cylinder top or cylinder bottom are of an integral structure.

7. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 6, characterized in that a sealing gasket (9) is arranged between the joint surfaces of the flange connection, the sealing gasket (9) is circular, a nylon screen (10) is arranged in a circular hole in the middle of the sealing gasket (9), and the mesh aperture of the nylon screen (10) is smaller than the mesh aperture on the circular hole plate.

8. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 7, characterized in that the mesh number of the nylon screen (10) is 100 meshes.

9. The sampling device for in-situ enrichment of phosphate in water bodies according to claim 1, characterized in that the structure for spirally ascending the water flow deviates from the center of the circular water inlet bin (3) by the axis of the water inlet joint (4), and the pipe wall of the water inlet joint (4) is tangent to the inner wall of the circular water inlet bin (3).

10. The sampling device for in-situ enrichment of phosphate in water bodies according to any one of claims 1 to 9, characterized in that the polymeric adsorbent material (2) is composed of anion exchange resin.