CN217156044U - Sampling device for in situ enrichment of phosphate in water bodies - Google Patents

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 bodies

technical field

The utility model relates to a sampling technology for phosphate in water bodies, in particular to a sampling device for in-situ enrichment of phosphates in water bodies.

Background technique

Since the 20th century, with the rapid development of economy, industry and agriculture, human activities have encountered a series of problems in water environment resources, among which the problem of water eutrophication is particularly prominent. Among them, phosphate is a key pollutant that causes eutrophication in lakes, rivers, reservoirs and other regions. The sources of phosphate in water include not only exogenous inputs such as industrial and agricultural wastewater, domestic sewage, surface runoff, and atmospheric dry and wet deposition, but also endogenous biological residue degradation and sediment phosphorus release. After the phosphate is input into the lake water, a series of migration and transformation occur, such as adsorption/desorption, precipitation/dissolution, absorption/transfer/release of animals and plants, etc., and it is exported through the runoff of the lake, artificial fishing, and plant harvesting. The interannual dynamic changes of different phosphate sources and input and output will produce different environmental effects. Limited by suitable research methods, there are certain limitations in relying on hydrochemical characteristic analysis, hydrological models or radioisotope tracing. At present, the research on traceability and migration of phosphorus is still very weak. Phosphate oxygen isotope (δ ¹⁸ _Op ) has gradually attracted wide attention as a new and effective fingerprint tracing tool, and has been applied to the source analysis of phosphorus in water environment and its biogeochemical cycle research.

In order to monitor the phosphate oxygen isotope (δ ¹⁸ _Op ) in the water body, the phosphate in the water body to be measured must be enriched, separated, purified and then converted into a high-purity, stable and sufficient Ag ₃ PO ₄ solid sample. Then high temperature pyrolysis-isotope ratio mass spectrometer (TC/EA-IRMS) was used to test the phosphate oxygen isotope (δ ¹⁸ _Op ) in Ag ₃ PO ₄ . Existing methods usually use containers to collect tens to hundreds of liters of raw water at a certain time point in order to enrich the amount of PO ₄ required for the test. There is a certain randomness in the centralized collection, and it is difficult to accurately reflect the phosphate in the raw water. Dynamic change information; the enrichment method generally adopts Mg(OH) ₂ -PO ₄ co-precipitation method, which needs to filter the collected raw water, add reagent materials, etc. The operation process is cumbersome, and more solubility will be adsorbed during precipitation Interfering factors such as organic matter (DOM) are likely to cause a low recovery rate of phosphate and increase the fractionation of oxygen isotopes, thereby affecting the accuracy of the δ ¹⁸ _Op test results. To this end, those skilled in the art have developed a continuous sampling device for in-situ enrichment of phosphate in water through efforts. After the box is placed in a body of flowing water, phosphate accumulates on the membrane as the body of water flows through the membrane. However, due to the sheet-like structure of the adsorption membrane, its enrichment capacity is limited. When it is necessary to collect the total amount of phosphate required for oxygen isotope detection, the collection takes a long time, and it is necessary to increase the area of the membrane or use multiple sampling devices. As a result, the structure is cumbersome, and when sampling, it must be placed in the water body to be sampled, resulting in inconvenient sampling operations. To this end, continuous improvement is required.

SUMMARY OF THE INVENTION

The purpose of the utility model is to solve the problem that the existing continuous sampling device for in-situ enrichment of phosphate in water is limited in its enrichment capacity. When satisfying the total amount of phosphate detected by oxygen isotope, the time required for collection is long, the sampling device is cumbersome, and the It must be placed in the water body to be sampled, which leads to the inconvenience of sampling operation. A sampling device for in-situ enrichment of phosphate in water body is provided. The organic polymer adsorption material makes it form an adsorption column structure, which significantly increases the enrichment capacity; at the same time, by setting the water inlet joint, the water body can be forced to flow through the sampling device by connecting the water pump with the joint, which greatly increases the sample water volume. The column adsorption capacity is significantly increased, and the total amount of phosphate required for oxygen isotope detection can be enriched. It has a compact structure, light weight, and does not need to be placed in the sampled water sample during sampling, and is easy to operate.

In order to achieve the foregoing purpose, the present invention adopts the following technical solutions.

A sampling device for in-situ enrichment of phosphate in water body, comprising a sampling container, the sampling container is cylindrical, the sampling container is filled with organic macromolecular adsorption material, and both ends of the cylinder of the sampling container are formed with The sieve type channel; the water inlet end of the sampling container is connected with a water inlet bin, the shell of the water inlet bin is provided with a water inlet joint, and the water inlet bin has a structure that makes the water flow spiral upward.

In the utility model adopting the aforementioned technical solutions, the sampling container is set in a cylindrical shape, and the container is filled with organic macromolecular adsorption material to form an adsorption column structure, which significantly increases the enrichment capacity; The joint can be used to connect the water pump to force the water to flow through the sampling device, which can greatly increase the sample water volume, effectively shorten the sampling time, and use the characteristic of the adsorption column to significantly increase the adsorption capacity to enrich the phosphate required for oxygen isotope detection. It is compact in structure and light in weight; it can be placed on shore for sampling, just submerge the suction port of the pump into the water at the sampling point, which can effectively prevent corrosion and greatly improve the convenience of sampling operations. Of course, since forced water flow does not affect the sampling results, it also applies to the sampling form placed in water. Among them, the spiral upward water flow formed by the water inlet tank can make the organic polymer adsorbent material suspend and fill the container, so as to give full play to its enrichment characteristics.

Preferably, the water outlet end of the sampling container is connected with a water outlet silo, and the shell of the water outlet silo is provided with a water outlet joint; the sieve holes constituting the sieve type channel are respectively arranged on the silo top of the water inlet silo and the silo bottom of the water outlet silo. The effluent buffer is formed by the effluent silo, which reduces the impact energy of the flowing water and ensures the adsorption effect of the organic polymer adsorbent on the phosphate.

Further preferably, both the water inlet silo and the water outlet silo have a circular container structure with both ends sealed, and the silo bottom of the water inlet silo is formed by a disc-shaped base with a diameter larger than the diameter of the water inlet silo body; The flange connection structure is adopted between the bin and the sampling container, as well as between the water outlet bin and the sampling container. When the sampling device is placed on the shore for sampling, the disc-shaped base is used to form a stable support for the sampling container, and the connection convenience of the flange connection structure is used to improve the disassembly and assembly convenience of the sampling device when filling and recovering the adsorbent material. .

Further preferably, the water outlet bin is composed of a buffer main bin and a slow flow pipeline, the lower end of the slow flow pipeline is connected to the sampling container, the upper end of the slow flow pipeline is inserted into the buffer main bin from the bottom of the buffer main bin, and the slow flow pipeline is inserted into the buffer main bin. The outlet is above the set height of the bottom of the buffer main tank. In order to slow down the water flow rate by extending the water outlet channel.

Still further preferably, the outlet of the slow-flow pipe is in a zigzag or wavy shape in the circumferential direction of the pipe wall. In order to further slow down the water flow by forming the height difference of the water.

Further preferably, the outer periphery of the cylinder walls at both ends of the sampling container are welded and fixed with flanges constituting the flange connection structure; There are a plurality of said sieve holes distributed on the circular orifice plate; the flanges constituting the flange connection structure on the water outlet silo and the water inlet silo are located outside the corresponding silo top or silo bottom, and are respectively connected with the corresponding water outlet silo or inlet silo. The outer walls of the water silo are connected; or, the flanges constituting the flange connection structure on the water outlet silo and the water inlet silo and the corresponding top or bottom of the cylinder are integral structures. In order to form a variety of structures for selection, it is convenient to select a specific structure form according to the actual processing conditions.

Further preferably, a sealing gasket is arranged between the joint surfaces of the flange connection, the sealing gasket is annular, and a nylon screen is arranged in the circular hole in the middle of the sealing gasket, and the mesh aperture of the nylon screen is smaller than that of the circle. The sieve hole diameter on the shaped orifice plate. It can not only make the water sample flow smoothly, but also prevent the organic polymer adsorption material from escaping.

Still further preferably, the mesh number of the nylon screen is 100 meshes. Better protection against the loss of organic polymer adsorbent materials.

Preferably, the structure for spirally rising the water flow is deviated from the center of the circular water inlet silo by the axis of the water inlet joint, and the pipe wall of the water inlet joint is tangent to the inner wall of the circular water inlet silo. In order to make the incoming water flow form a vortex in the warehouse along the wall of the warehouse, and then spiral upward, the spirally rising water flow makes the organic polymer adsorption material suspend and fill the container.

Preferably, the polymer adsorption material is composed of anion exchange resin. Make full use of the strong adsorption characteristics of existing materials for phosphate and the convenience of pre- and post-sampling treatment to ensure ideal sampling results. Among them, the anion exchange resin is preferably macroporous strongly basic styrene-based D201 resin.

The beneficial effect of the utility model is that the circular container is filled with the organic macromolecular adsorption material to form an adsorption column structure, thereby greatly increasing the adsorption capacity; so that the water body can be forced to flow through the sampling device to be enriched by the water pump. Sufficient amount of phosphate required for oxygen isotope test, and a set amount of water samples can also be obtained within a set period of time, so as to obtain more comprehensive analysis data; at the same time, the filling and recovery of organic polymer adsorption materials is convenient, and the device Compact structure, light weight, convenient sampling operation.

Description of drawings

FIG. 1 is a schematic axonometric view of the structure of the present invention.

Figure 2 is a schematic diagram of the positional relationship between the water inlet joint and the circular water inlet bin in the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings, but the present utility model is not limited to the scope of the embodiments.

Referring to Figures 1 and 2, a sampling device for in-situ enrichment of phosphate in water body includes a sampling container 1, the sampling container 1 is cylindrical, and the sampling container 1 is filled with an organic polymer adsorption material 2, and the sampling container 1 is Both ends of the cylinder of the container 1 are formed with sieve-type channels; the water inlet end of the sampling container 1 is connected with a water inlet bin 3, and a water inlet joint 4 is provided on the shell of the water inlet bin 3, and the water inlet joint 4 is provided with. There is a water inlet regulating valve 4a, and the water inlet silo 3 has a structure that makes the water flow spiral upward. The inner wall of the water inlet bin 3 is formed tangentially.

Among them, the polymer adsorbent 2 is composed of anion exchange resin, and is specifically composed of macroporous strongly basic styrene-based D201 resin. The water outlet end of the sampling container 1 is connected with a water outlet silo 5, and a water outlet joint 6 is arranged on the shell of the water outlet bunker 5, and the water outlet joint 6 is provided with a water outlet regulating valve 6a; The top of the silo and the bottom of the silo 5. The water inlet bin 3 and the water outlet bin 5 have a circular container structure with both ends sealed. The bottom of the water intake bin 3 is formed by a disc-shaped base 7 with a diameter larger than the diameter of the water intake bin 3; the water intake bin 3 and the sampling A flange connection structure is adopted between the containers 1 and between the water outlet bin 5 and the sampling container 1 .

The water outlet bin 5 is composed of a buffer main bin 5a and a slow flow pipeline 5b. The lower end of the slow flow pipeline 5b is connected to the sampling container 1, and the upper end of the slow flow pipeline 5b is inserted into the buffer main bin 5a from the bottom of the buffer main bin 5a. The outlet is higher than the set height of the bottom of the buffer main tank 5a. The outlet of the slow-flow duct 5b is zigzag or wavy in the circumferential direction of the duct wall.

The outer periphery of the cylinder walls at both ends of the sampling container 1 are welded and fixed with flanges 8 constituting a flange connection structure; A plurality of sieve holes are distributed on the upper; the flanges 8 constituting the flange connection structure on the outlet silo 5 and the inlet silo 3 are located outside the corresponding silo top or silo bottom, and are respectively connected with the outer wall of the corresponding outlet silo 5 or the inlet silo 3.

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

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

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

When the sampling device of this embodiment is applied, before sampling, the sampling container 1 and the water inlet bin 3 are fixedly connected together by flanges 8 , bolts and nuts, wherein a sealing gasket is arranged between the joint surfaces of the two flanges 8 Sheet 9, install a 100-mesh nylon screen 10 in the central circular hole of the sealing gasket 9. After the two are connected well, the pre-treated polymer adsorbent material 2 is filled in the sampling container 1, either an appropriate amount or full. After that, the water outlet silo 5 is fixedly connected to the upper end of the sampling container 1 through the slow flow pipe 5b section through the flange 8, bolts and nuts, including setting the sealing gasket 9 between the joint surfaces of the two flanges 8, and the sealing gasket 9. A 100-mesh nylon screen 10 is installed in the central circular hole of the sheet 9.

When sampling, place the sampling device on the bank of the river, reservoir or lake of the water body to be sampled, connect the water pump through the water inlet connector 4, and use the water pump to pump water to force the sampled water sample to flow through the device. During the sampling process, the flow rate can be detected by the flow meter, so as to count the total amount of water samples collected; the flow rate can also be adjusted by adjusting the water inlet regulating valve 4a or the water outlet regulating valve 6a, so as to collect a set amount of water samples within a set time. , such as collecting 1000L water samples in 24 hours.

After the sampling is completed, the water outlet bin 5 is removed, and the polymer adsorption material 2 is taken out. After post-processing, the total content of phosphate in the total amount of the collected water sample can be obtained.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention The new model will also have various changes and improvements, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

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.

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