A simple multi-module vertical subsurface flow constructed wetland test pool

Abstract

This invention provides a simple multi-module vertical subsurface flow constructed wetland test tank, including a test tank, an inlet pipe, and an outlet pipe. The test tank is cylindrical, with the inlet pipe connected to one side of the tank at the bottom. The inlet pipe connects to a drain pipe located on the axis of the test tank, with its end connected to an overflow outlet. Multiple baffles are spaced apart between the side of the test tank and the drain pipe, arranged radially along the test tank, dividing the area between the drain pipe and the side of the test tank into multiple modular spaces. This invention aims to provide a simple multi-module vertical subsurface flow constructed wetland test tank, offering multiple modular spaces suitable for planting different plants. Each modular space can use different downward and upward packing materials for testing. The influent water quality is completely consistent across all modular spaces, allowing for direct comparison of test results. It offers advantages such as reduced land area, reduced pipeline construction costs, and ease of operation.

Description

Technical Field

[0001] This invention belongs to the field of constructed wetland test devices, and in particular relates to a simple multi-module vertical subsurface flow constructed wetland test pool. Background Technology

[0002] Constructed wetlands are artificially built and controlled wetlands similar to marshes. Wastewater and sludge are systematically distributed onto these artificially constructed wetlands. As the wastewater and sludge flow in a certain direction, the technology mainly utilizes the physical, chemical, and biological synergistic effects of soil, artificial media, plants, and microorganisms to treat the wastewater and sludge.

[0003] Existing constructed wetland test devices are complex in structure and expensive to manufacture. The patent "A Micro-simulation Test Device for Constructed Wetlands with Uniform Water Distribution and Accurate Understanding of Internal Mechanisms (Patent No. N200910176533.4)" discloses a micro-simulation test device for constructed wetlands, but the water distribution device used to distribute water to the micro-simulation test grid of the constructed wetland requires a large amount of pipeline, which increases costs. Summary of the Invention

[0004] In view of this, the present invention aims to propose a simple multi-module vertical subsurface flow constructed wetland test pool, which provides multiple modular spaces for planting different plants. Each modular space can use different downward and upward packing materials for testing. The influent water quality of each modular space is completely consistent, and the test results can be compared intuitively. It has the advantages of reducing the footprint, reducing the cost of pipeline construction, and being easy to operate.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A simple multi-module vertical subsurface flow constructed wetland test tank includes a test tank, an inlet pipe, and an outlet pipe. The test tank is cylindrical, with the inlet pipe connected to one side of the test tank at the bottom. The inlet pipe connects to a drain pipe located on the axis of the test tank, with an overflow outlet at its end. Multiple partitions are spaced apart between the side of the test tank and the drain pipe, arranged radially along the test tank, dividing the space between the drain pipe and the side of the test tank into multiple modular spaces. A partition plate is installed within each modular space, with its bottom edge spaced apart from the bottom surface of the test tank, forming a water distribution space between the bottom edge of the partition plate and the bottom surface of the test tank. The partition plates are connected to the partition plates on both sides, dividing the modular space into an upward space and a downward space, with the downward space close to the drain pipe. The upward space is filled with upward-flowing filler, and the downward space is filled with downward-flowing filler. The overflow outlet is located above the downward-flowing filler. The top edge of the test tank and the top edge of the partition plates extend above the downward-flowing and upward-flowing filler, respectively.

[0007] Furthermore, multiple partition plates are interconnected to form an annular partition tube, which is coaxially arranged with the test pool.

[0008] Furthermore, slots are provided on the partition, and the partition is detachably connected to the annular dividing tube by means of the slots.

[0009] Furthermore, the overflow port is a funnel-shaped overflow port, and its overall shape is conical.

[0010] Furthermore, the upward packing material includes a limestone layer and a zeolite layer arranged from bottom to top.

[0011] Furthermore, the downward packing material includes a zeolite layer and a limestone layer arranged from bottom to top.

[0012] Furthermore, the height of the water distribution space is 500mm, and the water distribution space is filled with gravel or pebbles with a particle size of 10mm to 20mm.

[0013] Furthermore, a layer of permeable geotextile is provided on the top surface of the water distribution space.

[0014] Furthermore, 1 to 5 water outlet pipes are provided, which are evenly arranged around the outer circumference of the test pool, with one end of the water outlet pipe located above the upward packing material and the other end extending to the outside of the test pool.

[0015] Furthermore, the top edge of the test pool and the top edge of the partition plate both extend 300mm above the downward and upward packing materials.

[0016] Compared with existing technologies, the simplified multi-module vertical subsurface flow constructed wetland test tank described in this invention has the following advantages:

[0017] This invention discloses a simple multi-module vertical subsurface flow constructed wetland test tank. The test tank is divided into several modular spaces, each of which is further divided into an upward space and a downward space. Each modular space can be planted with different plants to form multiple test groups, and each test group can use different downward and upward packing materials for testing. The test results can be compared directly. This invention has the advantages of reducing the land area occupied, increasing plant biomass, strong reoxygenation capacity, fully presenting ecological landscape functions, reducing pipeline construction costs, and being easy to operate. At the same time, it can ensure that the influent water quality of each modular space is completely consistent. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1This is a schematic diagram of the overall structure of the test tank according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the test pool according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the annular separator tube and partition plate described in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Experimental pool; 2-Baffle; 3-Divider plate; 4-Downward space; 5-Upward space; 6-Outlet pipe; 7-Drainage pipe; 8-Module space; 9-Overflow outlet; 10-Inlet pipe; 11-Water distribution space; 12-Permeable geotextile; 13-Limestone layer; 14-Zeolite layer; 15-Slot; 16-Annular dividing pipe; 17-Wetland plants. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 , Figure 2 As shown, a simple multi-module vertical subsurface flow constructed wetland test tank includes a test tank 1, an inlet pipe 10, and an outlet pipe 6. The test tank 1 is cylindrical, with the inlet pipe 10 connected to one side of the test tank 1. The inlet pipe 10 is located at the bottom of the test tank 1 and is connected to a drain pipe 7, which is located on the axis of the test tank 1. The end of the drain pipe 7 is connected to an overflow port 9. Multiple partitions 2 are spaced apart between the side of the test tank 1 and the drain pipe 7. The partitions 2 are arranged radially along the test tank 1, and the partitions 1 divide the space between the drain pipe 7 and the side of the test tank into multiple modular spaces 8. A partition plate 3 is installed inside the test tank 8. The bottom edge of the partition plate 3 is spaced apart from the bottom surface of the test tank 1, forming a water distribution space 11 between the bottom edge of the partition plate 3 and the bottom surface of the test tank 1. The partition plate 3 is connected to the baffle plate 2 on both sides, dividing the module space 8 into an upward space 5 and a downward space 4. The downward space 4 is close to the drainage pipe 7. The upward space 5 is filled with upward packing material, and the downward space 4 is filled with downward packing material. The overflow port 9 is located above the downward packing material. The top edge of the test tank and the top edge of the partition plate 3 both extend above the downward and upward packing materials. Preferably, the test tank 1, the baffle plate 2, and the partition plate 3 are all made of PE material, which is easy to install, corrosion-resistant, and recyclable.

[0027] This invention discloses a simple multi-module vertical subsurface flow constructed wetland experimental tank. The tank is internally divided into several modular spaces by partitions, the number of which is adjustable as needed. Each modular space is further divided into an upward space 5 and a downward space 4. Different plants can be planted in each modular space to form multiple experimental groups, and each experimental group can use different downward and upward packing materials for testing. The test results can be directly compared. Wastewater enters from the bottom through the inlet pipe, rises through the drainage pipe 7, overflows evenly from the overflow port 9 to the upper part of the downward space 4 of each modular space, then flows downward through the upward packing material to the bottom water distribution space 11, and then flows upward through the upward space 5 to the upper part of the upward packing material, before being discharged through the outlet pipe. This invention, by dividing the experimental tank into modular spaces, upward spaces, and downward spaces, has the advantages of reducing the footprint, increasing plant biomass, strong reoxygenation capacity, fully presenting ecological landscape functions, reducing pipeline construction costs, and being easy to operate; at the same time, it can ensure that the influent water quality of each modular space is completely consistent.

[0028] like Figure 1 As shown, multiple partition plates 3 are interconnected to form an annular partition tube, which is coaxially arranged with the test pool 1. Slots 15 are provided on the partition plates 2, and the partition plates 2 are detachably connected to the annular partition tube 16 via the slots 15. The detachable partition plates 2 can be added or removed as needed, and assembly via the slots is more convenient. Preferably, in this embodiment, the diameter of the test pool is 3500mm to 4000mm, and there are four partition plates 2, which divide the test pool into four modular spaces. The partition plates 3 are 850mm to 950mm away from the drainage pipe; the height of the water distribution space 11 is 450mm to 550mm; and the heights of the upward and downward packing materials are both 1100mm to 1300mm.

[0029] like Figure 2 As shown, the overflow port 9 is a funnel-shaped overflow port, and its overall shape is conical. This ensures uniform overflow, a reasonable layout, and reduced manufacturing costs.

[0030] like Figure 2 As shown, the upward packing material includes a limestone layer 13 and a zeolite layer 14 arranged from bottom to top. The downward packing material includes a zeolite layer 14 and a limestone layer 13 arranged from bottom to top. The limestone used in the limestone layer 13 has a particle size of 30-50 mm. Limestone has good phosphorus adsorption properties and, due to its high adsorption saturation, facilitates the attachment and growth of plant roots and microorganisms. Furthermore, zeolite can buffer and fix ammonia nitrogen in the influent and provide it for plant absorption.

[0031] like Figure 2As shown, the water distribution space 11 has a height of 500 mm and is filled with gravel or pebbles with a particle size of 10 mm to 20 mm. A layer of permeable geotextile 12 is provided on the top surface of the water distribution space 11. The permeable geotextile 12 is used to confine the gravel or pebbles and has a water permeability function.

[0032] like Figure 1 As shown, the water outlet pipes 6 include 1 to 5 pipes, which are evenly arranged around the outer circumference of the test tank 1. One end of each water outlet pipe 6 is located above the upward packing material, and the other end extends to the outside of the test tank 1. This ensures that the water flowing from bottom to top through the upward space 5 to the upper part of the upward packing material is discharged promptly and evenly through the water outlet pipes.

[0033] like Figure 2 As shown, the top edge of the test tank 1 and the top edge of the partition plate 3 both extend 300mm above the downward and upward packing materials. The top of the test tank 1 and the top of the partition plate 3 can accommodate water flowing upwards through the upward space 5 to the upper part of the upward packing material, as well as water overflowing evenly from the overflow port 9 to the upper parts of each downward packing material.

[0034] It should be further explained that: the soil covering the downfill and upfill is used to plant wetland plants 17. Different wetland plants can be selected according to different regions, such as flowers, rice, water spinach, water celery, etc. Suitable plants can be selected according to different temperatures and seasons. After the plants are harvested, they can also generate certain economic benefits.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A simple multi-module vertical subsurface flow constructed wetland test tank, comprising a test tank, an inlet pipe, and an outlet pipe, characterized in that: The test pool (1) is cylindrical. A water inlet pipe (10) is connected to one side of the test pool (1). The water inlet pipe (10) is located at the bottom of the test pool (1). The water inlet pipe (10) is connected to a drain pipe (7). The drain pipe (7) is located on the axis of the test pool (1). The end of the drain pipe (7) is connected to an overflow port (9). Multiple partitions (2) are arranged at intervals between the side of the test pool (1) and the drain pipe (7). The partitions (2) are arranged radially along the test pool (1). The partitions (2) divide the space between the drain pipe (7) and the side of the test pool into multiple modular spaces (8). A partition plate (3) is set in the modular space (8). The bottom of the partition plate (3) The bottom edge of the partition plate (3) is spaced apart from the bottom surface of the test tank (1), and a water distribution space (11) is formed between the bottom edge of the partition plate (3) and the bottom surface of the test tank (1); the partition plate (2) is connected to both sides of the partition plate (3), and the partition plate (3) divides the module space (8) into an upward space (5) and a downward space (4), and the downward space (4) is close to the drain pipe (7); the upward space (5) is filled with upward packing material, the downward space (4) is filled with downward packing material, and the overflow port (9) is located above the downward packing material; the top edge of the test tank and the top edge of the partition plate (3) both extend above the downward packing material and the upward packing material; Multiple partition plates (3) are interconnected to form a circular partition tube. The circular partition tube is coaxially arranged with the test pool (1). A slot (15) is opened on the partition plate (2). The partition plate (2) is fitted onto the circular partition tube (16) through the slot (15) to form a detachable connection. The diameter of the test pool (1) is 3500mm to 4000mm. The partition (2) includes 4 partitions, which divide the test pool into 4 modular spaces (8). Each modular space is divided into an upward space (5) and a downward space (4). Different plants can be planted in each modular space to form multiple test groups. Each test group can use different downward and upward fillers for testing. Wastewater enters from the bottom through the inlet pipe, flows upward through the diversion pipe (7), overflows evenly through the overflow port (9) to the upper part of the downward space (4) of each module space, then flows from top to bottom through the downward packing material to the bottom water distribution space (11), and then flows from bottom to top through the upward space (5) to the upper part of the upward packing material, and is discharged through the outlet pipe.

2. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: The overflow port (9) is a funnel-shaped overflow port, and its overall shape is conical.

3. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: The upward packing material includes a limestone layer (13) and a zeolite layer (14) arranged from bottom to top.

4. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: The downward packing material includes a zeolite layer (14) and a limestone layer (13) arranged from bottom to top.

5. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: The height of the water distribution space (11) is 500 mm, and the water distribution space is filled with gravel or pebbles with a particle size of 10 mm to 20 mm.

6. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: A layer of permeable geotextile (12) is provided on the top surface of the water distribution space (11).

7. The simplified multi-module vertical subsurface flow constructed wetland test tank according to claim 1, characterized in that: The top edge of the test pool (1) and the top edge of the partition plate both extend 300 mm above the downward packing and the upward packing.

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