CN109187096B - Hierarchical sampling device of little plastic contaminant in sewage - Google Patents
Hierarchical sampling device of little plastic contaminant in sewage Download PDFInfo
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- CN109187096B CN109187096B CN201811134135.1A CN201811134135A CN109187096B CN 109187096 B CN109187096 B CN 109187096B CN 201811134135 A CN201811134135 A CN 201811134135A CN 109187096 B CN109187096 B CN 109187096B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1006—Dispersed solids
- G01N2001/1012—Suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
Abstract
The invention discloses a grading sampling device for micro plastic pollutants in sewage, which mainly comprises a filtering and grading device, a sampling device, a water tank and a wastewater collecting box; the filtering and grading device is connected with the sampling device; the sampling device comprises a first sampler, a second sampler, a third sampler and a fourth sampler; the water tank is respectively connected with the collecting bottles of the first sampler, the second sampler, the third sampler and the fourth sampler, and a water suction pump and an electromagnetic valve are arranged at the connection part; the wastewater collection box is respectively connected with a sewage inlet and a sewage outlet of the first sampler, the second sampler, the third sampler and the fourth sampler, and the joints are provided with electromagnetic valves; the invention provides a screening device which is simple, stable and economical to operate for collecting micro plastic pollutants in a water body by designing a continuous and uninterrupted grading filtration method.
Description
Technical Field
The invention relates to the technical field of micro-plastic sampling, in particular to a grading sampling device for micro-plastic pollutants in sewage.
Background
Recently, plastic products have been increasingly used in daily life, and are widely used at home and abroad. Although plastic products bring convenience to social life, the negative side of the "plastic age" is gradually emerging. In fact, the accumulation of plastics in aqueous environments (oceans and rivers and lakes) not only creates landscape problems and a series of ecological impacts, but also the possibility of their uptake by organisms increases significantly as they grow over time, degrading, fissioning into pollutants of smaller size — "micro-plastics" (diameter <5mm), under the action of physical, chemical, biological, etc., a phenomenon that has attracted widespread attention from the scientific community. As an artificial synthetic product, micro-plastics are mostly derived from industrial, domestic sewage discharge and garbage degradation, and the common polymer types are: polymers such as polypropylene (PP), Polyethylene (PE), Polystyrene (PS), polyvinyl chloride (PVC), polylactic acid (PLA), and polyethylene terephthalate (PET). The micro plastic has the characteristics of small particle size, large specific surface area and strong hydrophobicity, can release harmful substances (phthalate, bisphenol A, formaldehyde and the like) and can easily adsorb the pollutants in water, including Polycyclic Aromatic Hydrocarbons (PAH), polychlorinated biphenyls (PCBs) and the like. When ingested by aquatic organisms, the microposts release the entrained contaminants and become toxic to the organisms. In addition, plastics contain various additives (such as plasticizers, stabilizers, fillers and the like) and are mostly not biodegradable, and the additives can be released in the process of forming micro plastics from large-pollutant plastics in the environment, so that the harmful effect is caused on water bodies. Therefore, as a new environmental pollutant, micro plastic has become a research hotspot in recent years and in the future.
At present, a device and a method for collecting micro-plastics in a water sample are not standardized, and the size of the micro-plastics is concerned to be smaller and smaller along with the deepening of research, so the separation difficulty is larger and larger, and the device for collecting the micro-plastics in the prior art cannot effectively collect the micro-plastics in a grading manner. For micro-plastics with a size <5mm, visible (or not), the micro-plastic fibers in the surrounding environment are not intercepted from being contaminated when sieving. Meanwhile, the sample is not only repeatedly operated and is tedious and time-consuming in the transferring process, but also the pollution probability of the external environment is increased. Therefore, a micro plastic pollutant grading and collecting device in a sewage treatment plant is developed, the pollution of air and objects in the surrounding environment can be reduced, micro plastic (different particle size ranges) can be collected quickly and efficiently, and the subsequent particle size measurement and identification are facilitated.
Disclosure of Invention
Aiming at the existing problems, the invention provides a grading sampling device for micro plastic pollutants in sewage.
The design scheme of the invention is as follows: a grading sampling device for micro plastic pollutants in sewage mainly comprises a filtering grading device, a sampling device, a water tank, a waste water collecting box, a control device and a power supply device; the filtering and grading device comprises a grading box, a connector and a filtering disc, wherein the grading box is provided with a sewage inlet, a buffer cavity and a water leakage disc, and the connector is provided with a water leakage groove; the sampling device comprises a first sampler, a second sampler, a third sampler and a fourth sampler;
the sewage inlet is connected with the grading box, the sewage inlet is used for adding a sewage source to be collected into the grading box, and the buffer cavity is arranged at the joint of the sewage inlet and the grading box;
the number of the connectors is 4, the 4 connectors are sequentially and uniformly arranged on the inner wall of the grading box from top to bottom, the filter discs comprise a first filter disc, a second filter disc, a third filter disc and a fourth filter disc, the first filter disc, the second filter disc, the third filter disc and the fourth filter disc are respectively stainless steel filter discs with the aperture from large to small, the first filter disc, the second filter disc, the third filter disc and the fourth filter disc are respectively and movably arranged on the 4 connectors, and the first filter disc, the second filter disc, the third filter disc and the fourth filter disc divide the interior of the filtering and grading device into a raw water area, a primary water area, a secondary water area, a tertiary water area and a quaternary water area from top to bottom;
the lower end of the filtering and grading device is provided with an installation box, the water tank is arranged at the upper end in the installation box, and the wastewater collection box is arranged in the installation box and is positioned at the lower end of the water tank; the first sampler, the second sampler, the third sampler and the fourth sampler are respectively arranged on 4 side walls of the installation box;
the first sampler comprises a screening bottle, a collecting bottle and a sampling test tube, and the collecting bottle comprises a primary collecting bottle and a secondary collecting bottle; the bottom of the screening bottle is provided with a sewage inlet and outlet, the lower end of the screening bottle is provided with a primary filter screen, the primary collecting bottle is arranged in the screening bottle and is positioned above the primary filter screen, the secondary collecting bottle is arranged in the primary collecting bottle, the sampling test tube penetrates through the screening bottle and is movably arranged in the secondary collecting bottle, and a sample inlet is formed at the position, close to the upper end, of the sampling test tube; the sewage inlet and outlet are connected with the primary water area; the pore size of the primary filter screen is between the pore sizes of the first filter disc and the second filter disc;
the second sampler is different from the first sampler in that a sewage inlet and a sewage outlet of the second sampler are connected with a secondary water area, and the aperture of a secondary filter screen of the second sampler is between the apertures of a second filter disc and a third filter disc;
the third sampler is different from the first sampler in that a sewage inlet and a sewage outlet of the third sampler are connected with a tertiary water area, and the aperture of a tertiary filter screen of the third sampler is between the apertures of a third filter disc and a fourth filter disc;
the fourth sampler is different from the first sampler in that a sewage inlet and a sewage outlet of the fourth sampler are connected with a fourth-stage water area, and the aperture of a fourth-stage filter screen of the fourth sampler is smaller than that of a fourth filter disc;
the water tank is respectively connected with the collecting bottles of the first sampler, the second sampler, the third sampler and the fourth sampler, and a water suction pump and an electromagnetic valve are arranged at the connection part; the wastewater collection box is respectively connected with a sewage inlet and a sewage outlet of the first sampler, the second sampler, the third sampler and the fourth sampler and a water leakage groove, and the joints are provided with electromagnetic valves;
the control device comprises a controller and a touch screen, and the controller is connected with the water suction pump and the electromagnetic valve; the touch screen is connected with the controller; the power supply device provides power for the water suction pump and the electromagnetic valve.
Furthermore, the grading box adopts a round table-shaped stainless steel filtering container, the upper part of the filtering container is wide and the lower part of the filtering container is narrow, the upper bottom of the filtering container is 30cm wide, the lower bottom of the filtering container is 20cm wide and the height of the filtering container is 25 cm; it is more convenient when setting up first filter disc, second filter disc, third filter disc, fourth filter disc.
Furthermore, a box cover is movably arranged at the upper end of the grading box, and the sewage inlet and the buffer cavity are arranged on the box cover; each layer of filter screen is convenient to take out, and the filter screen is convenient to clean regularly.
Furthermore, the water leakage disc is provided with water leakage holes with the sizes of 4 holes, and the water leakage holes with the sizes of 4 holes are uniformly distributed on the water leakage disc from inside to outside in a circumferential shape according to the sizes of the holes from small to large; the sewage source can even inflow when getting into the classification case, prevents effectively that the jam from taking place, avoids rivers to hit and hits the department at first filter disc, causes the screening effect not good.
Furthermore, the first filter disc, the second filter disc, the third filter disc and the fourth filter disc are all conical, and two pull rings are arranged at the edges of the first filter disc, the second filter disc, the third filter disc and the fourth filter disc; the conical structure more helps rivers along with the even filter disc that sees through of action of gravity, and the setting up of pull ring makes it more convenient to take out the filter screen.
Further, the pore diameters of the first filter disc, the second filter disc, the third filter disc and the fourth filter disc are 333 μm, 150 μm, 74 μm and 30 μm respectively; the micro plastic pollutants can be screened more effectively according to the diameter of the micro plastic pollutants to be separated.
Furthermore, floating ball check valves are arranged on the first-stage collecting bottle and the second-stage collecting bottle, each floating ball check valve comprises a base and a floating ball, the bases are arranged on the inner walls of the first-stage collecting bottle and the second-stage collecting bottle, the floating balls are movably arranged on the bases, and when the floating balls are submerged in water, the floating balls can rise along with the water level; the water source is prevented from flowing back when sampling is carried out, and the sampling speed can be increased.
The working principle of the invention is as follows: when the device is used, a sewage source to be collected is added into the grading box from a sewage inlet, sewage is firstly screened by the filter disc, micro-plastic pollutants with different apertures respectively enter screening bottles in the first sampler, the second sampler, the third sampler and the fourth sampler as required, and then clear water is added into the screening bottles, so that the micro-plastic pollutants float to sampling test tubes along with the clear water; and after sampling, backwashing the interiors of the first sampler, the second sampler, the third sampler and the fourth sampler by using clean water.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a screening device which is simple, stable and economical to operate for collecting micro plastic pollutants in a water body by designing a continuous and uninterrupted grading filtration method. The device has higher working efficiency aiming at the filtration and collection of the micro-plastic in the samples of the sewage treatment plant, and solves the problems of time consumption, accuracy and the like of a certain volume of water samples in the extraction process; the device adopts a continuous and stable semi-automatic process, reduces the manual intervention of the pretreatment of the sample, and improves the collection efficiency. Meanwhile, all the equipment is daily available equipment, and the operation process is quick and simple; the invention adopts the round platform filter with wide upper part and narrow lower part, the small bottom is arranged below, the side surfaces of two sides lift water samples upwards, and the base bracket is arranged at the bottom of the device, thereby reducing the pressure on the bottom of the whole device and improving the stability of the whole round platform filter; the filtering container and the filtering screen which are selected by the invention are made of stainless steel materials, are non-toxic and harmless, can be recycled, reduce the use of the filtering membrane and are economical and practical.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the cover of the grading box of the present invention;
FIG. 3 is a bottom view of the drain pan of the present invention;
FIG. 4 is a schematic view of the connection structure of the classification tank, the connector and the filter tray of the present invention;
FIG. 5 is a schematic structural view of the mounting box of the present invention;
fig. 6 is a schematic diagram of the structure of a first sampler of the present invention;
FIG. 7 is a schematic view of the construction of a sampling tube of the present invention;
FIG. 8 is a schematic structural view of the floating ball check valve of the present invention;
the device comprises a 1-filtering and grading device, an 11-grading box, a 111-sewage inlet, a 112-buffer cavity, a 113-water leakage disc, a 12-connector, a 13-filtering disc, a 131-first filtering disc, a 132-second filtering disc, a 133-third filtering disc, a 134-fourth filtering disc, a 2-sampling device, a 21-first sampler, a 211-screening bottle, a 2110-sewage inlet and outlet, a 2111-first-stage filtering screen, a 212-first-stage collecting bottle, a 213-second-stage collecting bottle, a 214-sampling test tube, a 2140-sample inlet, a 22-second sampler, a 23-third sampler, a 24-fourth sampler, a 3-water tank, a 4-wastewater collecting box and a 5-floating ball check valve.
Detailed Description
Example (b): the grading sampling device for micro plastic pollutants in sewage mainly comprises a filtering and grading device 1, a sampling device 2, a water tank 3, a wastewater collection box 4, a control device and a power supply device, wherein the sampling device is connected with the filtering and grading device; the filtering and grading device 1 comprises a grading box 11, a connector 12 and a filter disc 13, wherein the grading box 11 is provided with a sewage inlet 111, a buffer cavity 112 and a water leakage disc 113, and the connector 12 is provided with a water leakage groove; the sampling device 2 comprises a first sampler 21, a second sampler 22, a third sampler 23 and a fourth sampler 24;
the sewage inlet 111 is connected with the grading box 11, the sewage inlet 111 is used for adding a sewage source to be collected into the grading box 11, and the buffer cavity 112 is arranged at the joint of the sewage inlet 111 and the grading box 11;
as shown in fig. 1 and 4, there are 4 connectors 12, the 4 connectors 12 are uniformly arranged on the inner wall of the classification box 11 from top to bottom in sequence, the filter discs 13 include a first filter disc 131, a second filter disc 132, a third filter disc 133 and a fourth filter disc 134, the first filter disc 131, the second filter disc 132, the third filter disc 133 and the fourth filter disc 134 are respectively stainless steel filter discs with small pore sizes, the first filter disc 131, the second filter disc 132, the third filter disc 133 and the fourth filter disc 134 are respectively movably placed on the 4 connectors 12, and the first filter disc 131, the second filter disc 132, the third filter disc 133 and the fourth filter disc 134 divide the interior of the filtration classification device 1 into a raw water area, a primary water area, a secondary water area, a tertiary water area and a quaternary water area from top to bottom; wherein, the grading box 11 adopts a round table-shaped stainless steel filtering container, the upper part is wide and the lower part is narrow, the upper bottom of the filtering container is 30cm wide, the lower bottom is 20cm wide and the height is 25 cm; as shown in fig. 1 and 2, a box cover is movably arranged at the upper end of the grading box 11, and a sewage inlet 111 and a buffer cavity 112 are arranged on the box cover; as shown in fig. 3, the water leakage tray 113 is provided with water leakage holes with 4 apertures, and the water leakage holes with 4 apertures are uniformly distributed on the water leakage tray 113 from inside to outside in a circumferential shape according to the aperture from small to large; the first filter disc 131, the second filter disc 132, the third filter disc 133 and the fourth filter disc 134 are all conical, and two pull rings 131 are arranged at the edges; the pore diameters of the first filter disc 131, the second filter disc 132, the third filter disc 133 and the fourth filter disc 134 are 333 μm, 150 μm, 74 μm and 30 μm, respectively;
as shown in fig. 1 and 5, the lower end of the filtering and grading device 1 is provided with an installation box, a water tank 3 is arranged at the upper end in the installation box, and a wastewater collection box 4 is arranged in the installation box and is positioned at the lower end of the water tank 3; the first sampler 21, the second sampler 22, the third sampler 23 and the fourth sampler 24 are respectively arranged on 4 side walls of the installation box;
as shown in fig. 6 and 7, the first sampler 21 includes a screening bottle 211, a collection bottle and a sampling test tube 214, wherein the collection bottle includes a primary collection bottle 212 and a secondary collection bottle 213; the bottom of the screening bottle 211 is provided with a sewage inlet and outlet 2110, the lower end of the screening bottle 211 is provided with a primary filter screen 2111, the primary collection bottle 212 is arranged inside the screening bottle 211 and is positioned above the primary filter screen 2111, the secondary collection bottle 213 is arranged inside the primary collection bottle 212, the sampling test tube 214 penetrates through the screening bottle 211, the primary collection bottle 212 is movably arranged inside the secondary collection bottle 213, and a sample inlet 2140 is arranged at the position, close to the upper end, of the sampling test tube 214; the sewage inlet and outlet 2110 are connected with the primary water area; the aperture size of the primary filter 2111 is between the apertures of the first filter disc 131 and the second filter disc 132;
the second sampler 22 is different from the first sampler 21 in that the sewage inlet and outlet of the second sampler 22 is connected with the secondary water area, and the aperture of the secondary filter screen of the second sampler 22 is between the apertures of the second filter disc 132 and the third filter disc 133;
the third sampler 23 is different from the first sampler 21 in that a sewage inlet and a sewage outlet of the third sampler 23 are connected with a tertiary water area, and the aperture of a tertiary filter screen of the third sampler 23 is between the apertures of a third filter disc 133 and a fourth filter disc 134;
the fourth sampler 24 is different from the first sampler 21 in that a sewage inlet and a sewage outlet of the fourth sampler 24 are connected with a fourth-stage water area, and the aperture of a fourth-stage filter screen of the fourth sampler 24 is smaller than that of a fourth filter disc 134;
the water tank 3 is respectively connected with the collecting bottles of a first sampler 21, a second sampler 22, a third sampler 23 and a fourth sampler 24, and a water pump and an electromagnetic valve are arranged at the connection positions; the wastewater collection box 4 is respectively connected with a wastewater inlet and a wastewater outlet of a first sampler 21, a second sampler 22, a third sampler 23 and a fourth sampler 24 and a water leakage tank, and the joints are provided with electromagnetic valves;
the control device comprises a controller and a touch screen, and the controller is connected with the water pump and the electromagnetic valve; the touch screen is connected with the controller; the power supply device provides power for the water pump and the electromagnetic valve.
Wherein, be provided with floating ball check valve 5 on the one-level receiving flask 212, the second grade receiving flask 213 as shown in fig. 6, 8, floating ball check valve 5 includes base and floating ball, and the base setting is on the inner wall of one-level receiving flask 212, second grade receiving flask 213, and the floating ball activity is placed on the base, and when water logging did not have the floating ball, the floating ball can rise along with the water level.
The working principle of the invention is as follows: when the device is used, a sewage source to be collected is added into the grading box 11 from the sewage inlet 111, sewage is firstly sieved by the filter disc 13, micro plastic pollutants with different apertures respectively enter the screening bottles 211 in the first sampler 21, the second sampler 22, the third sampler 23 and the fourth sampler 24 according to requirements, and then clear water is added into the screening bottles 211, so that the micro plastic pollutants float to the sampling test tubes 214 along with the clear water; after sampling, the interiors of the first sampler 21, the second sampler 22, the third sampler 23 and the fourth sampler 24 are backwashed by clean water.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A grading sampling device for micro plastic pollutants in sewage is characterized by mainly comprising a filtering and grading device (1), a sampling device (2), a water tank (3), a waste water collecting box (4), a control device and a power supply device; the filtering and grading device (1) comprises a grading box (11), a connector (12) and a filtering disc (13), wherein a sewage inlet (111), a buffer cavity (112) and a water leakage disc (113) are arranged on the grading box (11), and a water leakage groove is arranged on the connector (12); the sampling device (2) comprises a first sampler (21), a second sampler (22), a third sampler (23) and a fourth sampler (24);
the sewage inlet (111) is connected with the grading box (11), the sewage inlet (111) is used for adding a sewage source to be collected into the grading box (11), and the buffer cavity (112) is arranged at the connection position of the sewage inlet (111) and the grading box (11);
the number of the connectors (12) is 4, the 4 connectors (12) are evenly arranged on the inner wall of the grading box (11) from top to bottom in sequence, the filter disc (13) comprises a first filter disc (131), a second filter disc (132), a third filter disc (133) and a fourth filter disc (134), the first filter disc (131), the second filter disc (132), the third filter disc (133) and the fourth filter disc (134) are respectively stainless steel filter sheets with the aperture from large to small, the first filter disc (131), the second filter disc (132), the third filter disc (133) and the fourth filter disc (134) are respectively and movably placed on the 4 connectors (12), and the first filter disc (131), the second filter disc (132), the third filter disc (133) and the fourth filter disc (134) divide the interior of the filtering and grading device (1) into a raw water area, a primary water area, a secondary water area, a tertiary water area and a quaternary water area from top to bottom;
the lower end of the filtering and grading device (1) is provided with an installation box, the water tank (3) is arranged at the upper end in the installation box, and the wastewater collection box (4) is arranged in the installation box and is positioned at the lower end of the water tank (3); the first sampler (21), the second sampler (22), the third sampler (23) and the fourth sampler (24) are respectively arranged on 4 side walls of the installation box;
the first sampler (21) comprises a screening bottle (211) and a collection bottle and a sampling test tube (214), wherein the collection bottle comprises a primary collection bottle (212) and a secondary collection bottle (213); the bottom of the screening bottle (211) is provided with a sewage inlet and outlet (2110), the lower end of the screening bottle (211) is provided with a primary filter screen (2111), the primary collecting bottle (212) is arranged inside the screening bottle (211) and above the primary filter screen (2111), the secondary collecting bottle (213) is arranged inside the primary collecting bottle (212), the sampling test tube (214) penetrates through the screening bottle (211) and the primary collecting bottle (212) and is movably arranged inside the secondary collecting bottle (213), and the sampling test tube (214) is provided with a sample inlet (2140) close to the upper end; the sewage inlet and outlet (2110) is connected with the primary water area; the aperture size of the primary filter screen (2111) is between the apertures of the first filter disc (131) and the second filter disc (132);
the second sampler (22) is different from the first sampler (21) in that a sewage inlet and a sewage outlet of the second sampler (22) are connected with a secondary water area, and the aperture of a secondary filter screen of the second sampler (22) is between the apertures of a second filter disc (132) and a third filter disc (133);
the third sampler (23) is different from the first sampler (21) in that a sewage inlet and a sewage outlet of the third sampler (23) are connected with a tertiary water area, and the aperture of a tertiary filter screen of the third sampler (23) is between the apertures of a third filter disc (133) and a fourth filter disc (134);
the fourth sampler (24) is different from the first sampler (21) in that a sewage inlet and a sewage outlet of the fourth sampler (24) are connected with a four-stage water area, and the aperture of a four-stage filter screen of the fourth sampler (24) is smaller than that of a fourth filter disc (134);
the water tank (3) is respectively connected with collecting bottles of a first sampler (21), a second sampler (22), a third sampler (23) and a fourth sampler (24), and a water suction pump and an electromagnetic valve are arranged at the connection positions; the wastewater collection box (4) is respectively connected with a sewage inlet and a sewage outlet of the first sampler (21), the second sampler (22), the third sampler (23) and the fourth sampler (24) and a water leakage tank, and an electromagnetic valve is arranged at the joint;
the control device comprises a controller and a touch screen, and the controller is connected with the water suction pump and the electromagnetic valve; the touch screen is connected with the controller; the power supply device provides power for the water suction pump and the electromagnetic valve.
2. The device for grading and sampling micro plastic pollutants in sewage as claimed in claim 1, wherein the grading box (11) adopts a round table-shaped stainless steel filtering container, the upper part of the stainless steel filtering container is wide and the lower part of the stainless steel filtering container is narrow, the width of the upper bottom of the filtering container is 30cm, the width of the lower bottom of the filtering container is 20cm, and the height of the filtering container is 25 cm.
3. The device for graded sampling of micro plastic pollutants in sewage water according to claim 1, wherein a cover is movably arranged at the upper end of the grading box (11), and the sewage inlet (111) and the buffer cavity (112) are arranged on the cover.
4. The device for fractional sampling of micro plastic contaminants in wastewater according to claim 1, wherein the water leakage tray (113) is provided with water leakage holes with 4 pore sizes, and the water leakage holes with 4 pore sizes are uniformly distributed on the water leakage tray (113) from inside to outside in a circumferential shape according to the pore size from small to large.
5. The device for fractional sampling of micro plastic contaminants in wastewater according to claim 1, wherein the first filter disc (131), the second filter disc (132), the third filter disc (133) and the fourth filter disc (134) are all conical and provided with two pull rings (131) at the edge.
6. The device for fractional sampling of micro plastic contaminants in wastewater according to claim 1, wherein the first filter disc (131), the second filter disc (132), the third filter disc (133) and the fourth filter disc (134) have pore sizes of 333 μm, 150 μm, 74 μm and 30 μm, respectively.
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| CN201811134135.1A CN109187096B (en) | 2018-09-27 | 2018-09-27 | Hierarchical sampling device of little plastic contaminant in sewage |
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| CN201811134135.1A CN109187096B (en) | 2018-09-27 | 2018-09-27 | Hierarchical sampling device of little plastic contaminant in sewage |
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| CN109187096B true CN109187096B (en) | 2020-09-18 |
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| CN110006700A (en) * | 2019-03-27 | 2019-07-12 | 江苏省常州环境监测中心 | Micro- plastics Quick Acquisition sorting unit in a kind of water body based on integrated control |
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