CN212127705U - A Vertical Composite Flow Constructed Wetland Model - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a vertical composite flow artificial wetland model. It includes a bracket on which a culture pond, a first purification pond, a second purification pond, a third purification pond and a fourth purification pond are arranged in sequence from top to bottom; The water outlet of one purification tank is connected to the water inlet of the next purification tank through a water pipe; the water outlet of the breeding tank is connected to the water inlet of the first purification tank through a water pipe; the water outlet of the fourth purification tank is connected to a water pipe and the purified The water is transported back to the breeding pond; the first purification pond, the second purification pond, the third purification pond and the fourth purification pond are respectively provided with a first surface flow constructed wetland, a second surface flow constructed wetland, a first subsurface flow constructed wetland and a second Subsurface constructed wetlands. This model can greatly save the area occupied by the constructed wetland, increase the pollution load, and achieve a good landscape display effect.

Description

A Vertical Composite Flow Constructed Wetland Model

technical field

The utility model relates to the technical field of sewage treatment, in particular to a vertical composite flow artificial wetland model.

Background technique

Constructed wetland refers to artificially built pools or trenches, laying anti-seepage water-proof layer on the bottom, filling a certain depth of matrix layer, planting aquatic plants, and using the physical, chemical and biological triple synergy of matrix, plants and microorganisms to control pollutants. Adsorption, absorption and conversion are carried out to purify sewage. According to the sewage flow mode, it is divided into surface flow constructed wetlands, horizontal subsurface flow constructed wetlands and vertical subsurface flow constructed wetlands.

Surface-flow constructed wetland sewage is above the surface of the substrate layer, and flows horizontally from the inlet end of the pool to the outlet end. It has the advantages of simple structure, low operating cost, and good oxygen-enriching capacity, but it covers a large area, has a low pollution load, and is easy to breed mosquitoes. flies; horizontal subsurface flow of constructed wetland sewage is below the surface of the substrate layer, and flows horizontally from the inlet end of the pool to the outlet end, with good water purification effect and sanitary conditions, but poor oxygen enrichment effect and poor denitrification and phosphorus removal effect; vertical subsurface flow Constructed wetland sewage vertically passes through the matrix layer in the tank body, which has high oxygen transmission capacity and good pollutant removal effect, but the structure is complicated and the investment cost is high. There are many problems in using one type of constructed wetland to treat sewage. In actual use, a composite flow constructed wetland treatment system needs to be used. Therefore, it is necessary to develop a vertical composite flow constructed wetland model to understand the purification efficiency and purification mechanism of the composite flow constructed wetland. research.

Utility model content

In order to more intuitively and accurately grasp the purification efficiency and purification mechanism of different types and composite flow constructed wetlands, and take into account the landscape and display effect of the constructed wetland, the utility model has developed a vertical multi-layer structure composite flow constructed wetland model, which can be extremely The earth saves the area occupied by the constructed wetland, increases the pollution load of the constructed wetland, and achieves a good landscape display effect.

The vertical composite flow constructed wetland model provided by the utility model is characterized in that it includes a bracket 1, and the bracket 1 is sequentially provided with a culture pool 2, a first purification pool 3, a second purification pool 4, a Three purification ponds 5 and the fourth purification pond 6; the two ends of each purification pond are respectively provided with a water inlet and a water outlet, and the water outlet of the previous purification pond is connected with the water inlet of the next purification pond through a water pipe; The water outlet of 2 is connected to the water inlet of the first purification tank 3 through a water pipe; the water outlet of the fourth purification tank 6 is connected to a water pipe and the purified water is transported back to the culturing pond 2 by a water pump 7; the The first purification pool 3, the second purification pool 4, the third purification pool 5 and the fourth purification pool 6 are respectively provided with a first surface flow constructed wetland, a second surface flow constructed wetland, a first subsurface flow constructed wetland and a second subsurface flow Artificial wetland.

The artificial wetland model provided by the utility model improves the artificial wetland system from the design concept, and fully meets the requirements of experimental operation. On the one hand, the vertical multi-layer structure is adopted, and the surface flow constructed wetland and the horizontal subsurface flow constructed wetland are vertically placed on the landscape support. Compared with the horizontally placed constructed wetland, the floor space can be greatly reduced, the experimental arrangement is convenient, and the The purification efficiency per unit area solves the balance between the area of the constructed wetland and the purification efficiency. On the other hand, it is equipped with a complete water circulation system, which produces sewage by cultivating aquatic animals (such as fish) in the breeding tank 2. The sewage passes through the first purification tank 3, the second purification tank 4, the third purification tank 5 and the first purification tank 3. After the four purification tanks 6 are purified, the obtained purified water is transported upwards by the water pump 7 back to the culture tank 2 .

In a preferred embodiment, the first purification tank 3 is provided with a first water distribution tank 8, a first wet tank 9 and a first drainage tank 10 in sequence from the water inlet end to the water outlet end; The end is provided with a water inlet and is connected to the water outlet of the culture pool 2 through a water pipe; a plurality of water distribution holes are opened on the partition plate between the first water distribution tank 8 and the first wet tank 9; Drainage holes are set on the partition plate between a wet tank 9 and the first drainage tank 10; a first surface flow constructed wetland is arranged in the first wet tank 9 and the surface of the substrate layer is lower than the water distribution holes and the The height of the drainage hole; the first drainage box 10 is provided with a water outlet at the water outlet end and is connected to the water inlet of the second purification tank 4 through a water pipe.

In a preferred embodiment, the second purification tank 4 is provided with a second wet tank 11 and a second drainage tank 12 in sequence from the water inlet end to the water outlet end; the second wet tank 11 is provided with a water inlet at the water inlet end and A water distribution pipe is connected, and a plurality of water distribution holes are opened on the water distribution pipe; drainage holes are formed on the partition plate between the second wet tank 11 and the second drainage tank 12 ; Set the second surface flow constructed wetland and make the surface of its matrix layer lower than the height of the water distribution holes and the drainage holes; the second drainage tank 12 is provided with a water outlet at the water outlet and is connected to the third purification tank 5 through a water pipe. water intake.

In a preferred embodiment, the third purification tank 5 is provided with a third wet tank 13 and a third drainage tank 14 in sequence from the water inlet end to the water outlet end; the third wet tank 13 is provided with a water inlet at the water inlet end and A water distribution pipe is connected, and a plurality of water distribution holes are opened on the water distribution pipe; drainage holes are formed on the partition plate between the third wet tank 13 and the third drainage tank 14 ; The first subsurface constructed wetland is set and the surface of its substrate layer is higher than the height of the water distribution holes and the drainage holes; the third drainage tank 14 is provided with a water outlet at the water outlet and is connected to the inlet of the fourth purification tank 6 through a water pipe. water outlet.

In a preferred embodiment, the fourth purification tank 6 is provided with a fourth water distribution tank 15, a fourth wet tank 16 and a fourth drainage tank 17 in sequence from the water inlet end to the water outlet end; A water inlet is opened at the end; a plurality of water distribution holes are opened on the partition plate between the fourth water distribution tank 15 and the fourth wet tank 16; the fourth wet tank 16 and the fourth drainage tank 17 Drainage holes are set on the partition plate between them; the fourth wetland tank 16 is provided with a second underflow constructed wetland and the surface of its matrix layer is higher than the height of the water distribution holes and the drainage holes; the fourth drainage tank 17 is in the water outlet. The end is provided with a water outlet and is connected to a water pump 7 through a water pipe.

In a preferred embodiment, the water pipe between the water outlet of the first purification tank 3 and the water inlet of the second purification tank 4 extends into the first drainage tank 10 and the pipe orifice extends upward to be lower than the water inlet of the second purification tank 4. The position of the top height of the first drainage tank 10; the water pipe between the water outlet of the second purification tank 4 and the water inlet of the third purification tank 5 extends into the second drainage tank 12 and the pipe mouth is upward Extend to a position lower than the top height of the second drainage tank 12 ; the water pipe between the water outlet of the third purification tank 5 and the water inlet of the fourth purification tank 6 extends into the third drainage tank 14 and the nozzle extends upward to a position lower than the top height of the third drainage tank 14 ; the water pipe between the water outlet of the fourth purification tank 6 and the water pump 7 extends into the fourth drainage tank 17 And the nozzle extends upward to a position lower than the height of the top of the fourth drainage tank 17 . The height of the water pipe orifice in the drainage tank can be adjusted according to the experimental design, which is used to adjust the water level in the tank and the water inlet speed of the next purification tank.

In some embodiments, the first purification tank 3 is a hexahedron without a top cover, the side wall of the water inlet end and the bottom plate are at an angle of 135 degrees, and the other side walls are perpendicular to the bottom plate; the second purification tank 4 , The third purification tank 5 and the fourth purification tank 6 are all rectangular parallelepipeds without a top cover.

In a preferred embodiment, lighting tubes 18 are provided on the upper brackets of the first purification tank 3 , the second purification tank 4 , the third purification tank 5 and the fourth purification tank 6 . By configuring the lighting system, it provides light source for the plants in the constructed wetland, and also has a good decorative effect.

In some embodiments, the substrate layer consists of a lightweight material for growing aquatic plants. For example, the substrate layer is composed of ceramsite for growing aquatic plants.

In a preferred embodiment, the culture pool 2, the first purification pool 3, the second purification pool 4, the third purification pool 5 and the fourth purification pool 6 are all made of colorless and transparent plexiglass plates. Ornamental fish can be cultivated in aquaculture ponds, and substrates are added and wetland plants are planted in four purification ponds according to the experimental requirements. Through plexiglass, the purification effect of different levels of artificial wetlands in the complete water circulation system can be visually observed to achieve good landscape and Popular science display effect.

The vertical composite flow constructed wetland model of the utility model has at least the following beneficial effects: the vertical multi-layer structure is used to place the multi-level constructed wetland, the floor area is small, and the purification of pollutants can be maximized in a limited space Efficiency, convenient for experimental installation and research on the mechanism of sewage purification. Equipped with a complete set of lighting system, water circulation system and aquaculture pond, it not only provides pollutants for the constructed wetland, but also can form a good landscape and popular science display effect, which is suitable for promotion and use in the national research on the mechanism of constructed wetland and the popular science exhibition of constructed wetland.

Description of drawings

Fig. 1. the structural representation of the vertical composite flow constructed wetland model in the typical embodiment of the present utility model;

Fig. 2. the structural representation of the first purification tank in the typical embodiment of the present utility model;

Fig. 3. the structural representation of the second purification tank in the typical embodiment of the present utility model;

Fig. 4. the structural representation of the third purification tank in the typical embodiment of the present utility model;

Fig. 5. the structural representation of the fourth purification tank in the typical embodiment of the present utility model;

Among them, 1-support, 2-culture pool, 3-first purification pool, 4-second purification pool, 5-third purification pool, 6-fourth purification pool, 7-water pump, 8-first water tank, 9-First wet tank, 10-First drainage tank, 11-Second wet tank, 12-Second drainage tank, 13-Third wet tank, 14-Third drainage tank, 15-Fourth water distribution tank, 16 - The fourth wet tank, 17- the fourth drain tank, 18- the lighting tube, 19- water inlet, 20- water distribution hole, 21- drain hole, 22- water outlet.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

The utility model provides a vertical composite flow constructed wetland model, comprising a bracket 1, on which a culture pool 2, a first purification pool 3, a second purification pool 4 and a third purification pool are sequentially arranged from top to bottom. 5 and the fourth purification pond 6; the two ends of each purification pond are respectively provided with a water inlet and a water outlet, and the water outlet of the previous purification pond and the water inlet of the next purification pond are connected by water pipes; The water inlet is connected to the water inlet of the first purification tank 3 through a water pipe; the water outlet of the fourth purification tank 6 is connected to a water pipe and the purified water is transported back to the culture tank 2 through a water pump 7; the first purification The pool 3, the second purification pool 4, the third purification pool 5 and the fourth purification pool 6 are respectively provided with a first surface flow constructed wetland, a second surface flow constructed wetland, a first underflow constructed wetland and a second underflow constructed wetland.

In a preferred embodiment, the first purification tank 3 is provided with a first water distribution tank 8, a first wet tank 9 and a first drainage tank 10 in sequence from the water inlet end to the water outlet end; The end is provided with a water inlet and is connected to the water outlet of the culture pool 2 through a water pipe; a plurality of water distribution holes are opened on the partition plate between the first water distribution tank 8 and the first wet tank 9; Drainage holes are set on the partition plate between a wet tank 9 and the first drainage tank 10; a first surface flow constructed wetland is arranged in the first wet tank 9 and the surface of the substrate layer is lower than the water distribution holes and the The height of the drainage hole; the first drainage box 10 is provided with a water outlet at the water outlet end and is connected to the water inlet of the second purification tank 4 through a water pipe.

In a preferred embodiment, the second purification tank 4 is provided with a second wet tank 11 and a second drainage tank 12 in sequence from the water inlet end to the water outlet end; the second wet tank 11 is provided with a water inlet at the water inlet end and A water distribution pipe is connected, and a plurality of water distribution holes are opened on the water distribution pipe; drainage holes are formed on the partition plate between the second wet tank 11 and the second drainage tank 12 ; Set the second surface flow constructed wetland and make the surface of its matrix layer lower than the height of the water distribution holes and the drainage holes; the second drainage tank 12 is provided with a water outlet at the water outlet and is connected to the third purification tank 5 through a water pipe. water intake.

In a preferred embodiment, the third purification tank 5 is provided with a third wet tank 13 and a third drainage tank 14 in sequence from the water inlet end to the water outlet end; the third wet tank 13 is provided with a water inlet at the water inlet end and A water distribution pipe is connected, and a plurality of water distribution holes are opened on the water distribution pipe; drainage holes are formed on the partition plate between the third wet tank 13 and the third drainage tank 14 ; The first subsurface constructed wetland is set and the surface of its substrate layer is higher than the height of the water distribution holes and the drainage holes; the third drainage tank 14 is provided with a water outlet at the water outlet and is connected to the inlet of the fourth purification tank 6 through a water pipe. water outlet.

In a preferred embodiment, the fourth purification tank 6 is provided with a fourth water distribution tank 15, a fourth wet tank 16 and a fourth drainage tank 17 in sequence from the water inlet end to the water outlet end; A water inlet is opened at the end; a plurality of water distribution holes are opened on the partition plate between the fourth water distribution tank 15 and the fourth wet tank 16; the fourth wet tank 16 and the fourth drainage tank 17 Drainage holes are set on the partition plate between them; the fourth wetland tank 16 is provided with a second underflow constructed wetland and the surface of its matrix layer is higher than the height of the water distribution holes and the drainage holes; the fourth drainage tank 17 is in the water outlet. The end is provided with a water outlet and is connected to a water pump 7 through a water pipe.

In a preferred embodiment, the water pipe between the water outlet of the first purification tank 3 and the water inlet of the second purification tank 4 extends into the first drainage tank 10 and the pipe orifice extends upward to be lower than the water inlet of the second purification tank 4. The position of the top height of the first drainage tank 10; the water pipe between the water outlet of the second purification tank 4 and the water inlet of the third purification tank 5 extends into the second drainage tank 12 and the pipe mouth is upward Extend to a position lower than the top height of the second drainage tank 12 ; the water pipe between the water outlet of the third purification tank 5 and the water inlet of the fourth purification tank 6 extends into the third drainage tank 14 and the nozzle extends upward to a position lower than the top height of the third drainage tank 14 ; the water pipe between the water outlet of the fourth purification tank 6 and the water pump 7 extends into the fourth drainage tank 17 And the nozzle extends upward to a position lower than the height of the top of the fourth drainage tank 17 .

In some embodiments, the first purification tank 3 is a hexahedron without a top cover, the side wall of the water inlet end and the bottom plate are at an angle of 135 degrees, and the other side walls are perpendicular to the bottom plate; the second purification tank 4 , The third purification tank 5 and the fourth purification tank 6 are all rectangular parallelepipeds without a top cover.

In a preferred embodiment, lighting tubes 18 are provided on the upper brackets of the first purification tank 3 , the second purification tank 4 , the third purification tank 5 and the fourth purification tank 6 .

In some embodiments, the matrix layer is composed of lightweight materials such as ceramsite.

In some embodiments, the substrate layer is planted with sedge, water chestnut, water lily or hornwort.

In a preferred embodiment, the culture pool 2, the first purification pool 3, the second purification pool 4, the third purification pool 5 and the fourth purification pool 6 are all made of colorless and transparent plexiglass plates.

In some embodiments of the present utility model, a method for making the following vertical composite flow constructed wetland model is also provided:

The required materials are plexiglass with a thickness of 8mm, a transparent silicone hose with an outer diameter of 10mm, a custom-made 5-layer landscape bracket, a water pump, and a lighting tube. Constructed wetland substrate (light materials such as ceramsite), wetland plants (sedge, water chestnut, water lily, hornwort, etc.) prepared according to the experimental requirements. The production steps are as follows:

1. Make a breeding pond

The breeding pond is designed as a cuboid without a top cover, with a length of 60cm, a width of 30cm and a height of 15cm. The two ends of the culture pond are respectively set as the water inlet end and the water outlet end. A water outlet is provided on the side wall of the water outlet end of the culture pond near the bottom, and the outer diameter of the water outlet is 10 mm.

2. Make the first purification pool

The first purification tank is designed as a hexahedron without a top cover with a 45° inclined surface at the inlet side, 15cm high, 64.2cm long and 30cm wide at the top, and is made of plexiglass plate with a thickness of 8mm, which is made by cutting and gluing. . A first built-in plate and a second built-in plate are arranged in the first purification tank, so that the first purification tank is divided into three spaces from the water inlet end to the water outlet end, which are respectively used as the first water distribution tank, the first wet tank and the first Drain tank.

A water inlet with an outer diameter of 10 mm is centrally arranged on the side wall of the water inlet end of the first water distribution tank, and the height of the water inlet from the bottom surface is 2 cm. Six water distribution holes with an outer diameter of 10 mm are arranged at equal intervals on the first built-in board, and the height of the water distribution holes from the bottom surface is 1.2 cm. A drainage hole with an outer diameter of 10 mm is centrally arranged on the second built-in board, and the height of the drainage hole from the bottom surface is 2.2 cm. A water outlet with an outer diameter of 10 mm is centrally opened on the side wall of the water outlet end of the first drainage tank, and the height of the water outlet from the bottom surface is 1.5 cm.

A matrix layer is laid in the first wet tank, and the matrix layer is composed of light materials such as ceramsite. The height of the substrate layer is lower than the height of the water distribution holes on the first built-in board and the height of the drainage holes on the second built-in board. Plant aquatic plants on the substrate layer: exotic sedges, etc. Thereby, the first surface flow constructed wetland is produced.

3. Make the second purification pool

The second purification tank is designed as a cuboid without a top cover, with a length of 60cm, a width of 30cm and a height of 15cm. A built-in plate is arranged in the second purification tank, so that the second purification tank is divided into two spaces from the water inlet end to the water outlet end, which are respectively used as the second wet tank and the second drainage tank.

A water inlet with an outer diameter of 10 mm is centrally arranged on the side wall of the water inlet end of the second wet tank, and the height of the water inlet from the bottom surface is 6 cm. A water distribution pipe is connected to the water inlet, and the water distribution pipe is provided with a plurality of water distribution holes. A drainage hole with an outer diameter of 10mm is arranged in the center of the built-in board, and the height of the drainage hole from the bottom surface is 2.2cm. A water outlet with an outer diameter of 10 mm is centrally opened on the side wall of the water outlet end of the second drainage tank, and the height of the water outlet from the bottom surface is 1.5 cm.

A matrix layer is laid in the second wet tank, and the matrix layer is composed of light materials such as ceramsite. The height of the substrate layer is lower than the height of the water distribution holes on the water distribution pipe and the height of the drainage holes on the built-in plate. Plant aquatic plants on top of the substrate layer: water lilies and hornworts, etc. Thereby, the second surface flow constructed wetland is produced.

4. Make the third purification pool

The third purification tank is designed as a cuboid without a top cover, with a length of 60cm, a width of 30cm and a height of 15cm. A built-in plate is arranged in the third purification tank, so that the third purification tank is divided into two spaces from the water inlet end to the water outlet end, which are respectively used as the third wet tank and the third drainage tank.

A water inlet with an outer diameter of 10 mm is centrally arranged on the side wall of the water inlet end of the third wet tank, and the height of the water inlet from the bottom surface is 6 cm. A water distribution pipe is connected to the water inlet, and the water distribution pipe is provided with a plurality of water distribution holes. A drainage hole with an outer diameter of 10mm is arranged in the center of the built-in board, and the height of the drainage hole from the bottom surface is 0.7cm. A water outlet with an outer diameter of 10 mm is centrally opened on the side wall of the water outlet end of the third drainage tank, and the height of the water outlet from the bottom surface is 1.5 cm.

A matrix layer is laid in the third wet tank, and the matrix layer is composed of light materials such as ceramsite. The height of the substrate layer is higher than the height of the water distribution holes on the water distribution pipe and the height of the drainage holes on the built-in plate. Plant aquatic plants on the substrate layer: water chestnuts, etc. Thereby, the first subsurface artificial wetland is produced.

5. Make the fourth purification pool

The fourth purification tank is designed as a cuboid without a top cover, with a length of 60cm, a width of 30cm and a height of 15cm. A first built-in plate and a second built-in plate are arranged in the fourth purification tank, so that the fourth purification tank is divided into three spaces from the water inlet end to the water outlet end, which are respectively used as the fourth water distribution tank, the fourth wet tank and the third space. Four drainage tanks.

A water inlet with an outer diameter of 10 mm is centrally arranged on the side wall of the water inlet end of the fourth water distribution tank, and the height of the water inlet from the bottom surface is 6 cm. Six water distribution holes with an outer diameter of 10 mm are arranged at equal intervals on the first built-in board, and the height of the water distribution holes from the bottom surface is 5.2 cm. A drainage hole with an outer diameter of 10 mm is centrally arranged on the second built-in board, and the height of the drainage hole from the bottom surface is 0.7 cm. A water outlet with an outer diameter of 10 mm is centrally opened on the side wall of the water outlet end of the fourth drainage tank, and the height of the water outlet from the bottom surface is 1.5 cm.

A matrix layer is laid in the fourth wet tank, and the matrix layer is composed of light materials such as ceramsite. The height of the substrate layer is higher than the height of the water distribution holes on the first built-in plate and the height of the drainage holes on the second built-in plate. Plant aquatic plants on the substrate layer: exotic sedges, etc. Thereby, the second subsurface artificial wetland is produced.

6. Assembly

Water circulation system: On the 5-story landscape bracket, place the breeding pond, the first purification pond, the second purification pond, the third purification pond and the fourth purification pond from top to bottom. Cut 5 transparent silicone hoses of suitable length, and connect the water outlet of the breeding pond and the water inlet of the first purification pond, the water outlet of the first purification pond and the water inlet of the second purification pond, and the water outlet of the second purification pond. And the water inlet of the third purification pool, the water outlet of the third purification pool, the water inlet of the fourth purification pool, the water outlet of the fourth purification pool and the water inlet of the water pump. Then, connect a long transparent silicone hose to the water outlet of the water pump and pull it upward, so that the nozzle of the hose leads to the water inlet end of the breeding pond.

Lighting system: Install a light tube on the bracket above each purification pool and connect the switch and power supply.

The words "upper," "lower," "left," "right," "front," "rear," etc. used herein to describe orientation are all for the convenience of description based on the orientation shown in the drawings in the drawings. In other words, in an actual device, these orientations may vary due to how the device is placed.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. Not all implementations can be exhaustive here. Any obvious changes or changes derived from the technical solutions of the present utility model are still within the protection scope of the present utility model.

Claims (10)

1. a vertical composite flow constructed wetland model, is characterized in that, comprises support (1), described support (1) is provided with cultivation pond (2), the first purification pool (3), The second purification pool (4), the third purification pool (5) and the fourth purification pool (6); The two ends of each purification tank are respectively provided with a water inlet and a water outlet, and the water outlet of the previous purification tank is connected with the water inlet of the next purification tank through a water pipe; the water outlet of the culture pond (2) is connected to the The water inlet of the first purification pond (3); the water outlet of the fourth purification pond (6) is connected to a water pipe and the purified water is transported back to the culturing pond (2) by a water pump (7); The first purification pool (3), the second purification pool (4), the third purification pool (5) and the fourth purification pool (6) are respectively provided with a first surface flow constructed wetland and a second surface flow constructed wetland , the first subsurface constructed wetland and the second subsurface constructed wetland. 2 . The vertical composite flow constructed wetland model according to claim 1 , wherein the first purification tank ( 3 ) is provided with a first water distribution tank ( 8 ) and a first wetland in sequence from the water inlet end to the water outlet end. 3 . a tank (9) and a first drain tank (10); The first water distribution tank (8) is provided with a water inlet at the water inlet end and is connected to the water outlet of the culture pond (2) through a water pipe; the first water distribution tank (8) and the first wet tank (9) A plurality of water distribution holes are opened on the partition plate between the first wet tank (9) and the first drainage tank (10); drainage holes are opened on the partition plate between the first wet tank (9) and the first drainage tank (10); the first wetland A first surface-flow constructed wetland is arranged in the box (9) and the surface of the substrate layer is lower than the height of the water distribution holes and the drainage holes; the first drainage box (10) is provided with a water outlet at the water outlet end and is connected with the water pipes. The water inlet of the second purification tank (4). 3 . The vertical composite flow constructed wetland model according to claim 2 , wherein the second purification tank ( 4 ) is provided with a second wetland tank ( 11 ) and a second drain in sequence from the water inlet end to the water outlet end. 4 . box(12); The second wet tank (11) is provided with a water inlet at the water inlet end and is connected to a water distribution pipe, and a plurality of water distribution holes are opened on the water distribution pipe; the second wet tank (11) and the second drainage tank Drainage holes are provided on the partition plate between (12); a second surface flow constructed wetland is arranged in the second wet box (11) and the surface of the substrate layer is lower than the height of the water distribution holes and the drainage holes; the The second drainage tank (12) is provided with a water outlet at the water outlet end and is connected to the water inlet of the third purification tank (5) through a water pipe. 4. The vertical composite flow constructed wetland model according to claim 3, wherein the third purification tank (5) is sequentially provided with a third wetland tank (13) and a third drainage from the water inlet end to the water outlet end box(14); The third wet tank (13) is provided with a water inlet at the water inlet end and is connected to a water distribution pipe, the water distribution pipe is provided with a plurality of water distribution holes; the third wet tank (13) and the third drainage tank Drainage holes are provided on the partition plate between (14); a first subsurface constructed wetland is arranged in the third wet box (13) and the surface of the substrate layer is higher than the height of the water distribution holes and the drainage holes; The three drainage tanks (14) are provided with a water outlet at the water outlet end and are connected to the water inlet of the fourth purification tank (6) through a water pipe. 5 . The vertical composite flow constructed wetland model according to claim 4 , wherein the fourth purification tank ( 6 ) is provided with a fourth water distribution tank ( 15 ) and a fourth wetland in sequence from the water inlet end to the water outlet end. 6 . tank (16) and fourth drain tank (17); The fourth water distribution tank (15) is provided with a water inlet at the water inlet end; a plurality of water distribution holes are provided on the partition plate between the fourth water distribution tank (15) and the fourth wet tank (16); Drainage holes are provided on the partition plate between the fourth wet tank (16) and the fourth drainage tank (17); the fourth wet tank (16) is provided with a second subsurface artificial wetland and its matrix is The surface of the layer is higher than the height of the water distribution holes and the drainage holes; the fourth drainage box (17) is provided with a water outlet at the water outlet end and is connected to the water pump (7) through a water pipe. 6. The vertical composite flow constructed wetland model according to claim 5, wherein, The water pipe between the water outlet of the first purification tank (3) and the water inlet of the second purification tank (4) extends into the first drainage tank (10) and the pipe opening extends upward to a level lower than the water inlet of the second purification tank (4). Describe the position of the top height of the first drainage tank (10); The water pipe between the water outlet of the second purification tank (4) and the water inlet of the third purification tank (5) extends into the second drainage tank (12) and the pipe orifice extends upward to be lower than the water inlet of the third purification tank (5). Describe the position of the top height of the second drainage tank (12); The water pipe between the water outlet of the third purification tank (5) and the water inlet of the fourth purification tank (6) extends into the third drainage tank (14) and the pipe orifice extends upward to be lower than the water inlet of the fourth purification tank (6). the position of the top height of the third drainage tank (14); The water pipe between the water outlet of the fourth purification tank (6) and the water pump (7) extends into the fourth drainage tank (17) and the pipe opening extends upward to be lower than the fourth drainage tank (17). 17) The location of the top height. 7 . The vertical composite flow constructed wetland model according to claim 1 , wherein the first purification tank ( 3 ) is a hexahedron without a top cover, and the angle between the side wall of the water inlet end and the bottom plate is 135 degrees. 8 . corners, and the other side walls are perpendicular to the bottom plate; the second purification pool (4), the third purification pool (5) and the fourth purification pool (6) are all rectangular parallelepipeds without a top cover. 8. The vertical composite flow constructed wetland model according to claim 1, wherein the first purification pool (3), the second purification pool (4), the third purification pool (5) and the fourth purification pool The upper brackets of the pool (6) are all provided with lighting tubes (18). 9 . The vertical composite flow constructed wetland model according to claim 2 , wherein the substrate layer is composed of light materials for planting aquatic plants. 10 . 10. The vertical composite flow constructed wetland model according to any one of claims 1-9, wherein the culturing pond (2), the first purification pond (3), the second purification pond (4), the The three purification pools (5) and the fourth purification pool (6) are made of colorless and transparent plexiglass plates.

Images