Liftable in-situ sampling constructed wetland device

Abstract

The utility model discloses a liftable in-situ sampling constructed wetland device, which relates to the technical field of sewage treatment, and comprises an outer frame, the bottom of the outer frame is fixedly connected with the bottom of a water sample monitoring port, a matrix unit body is arranged in the outer frame, the bottom of the matrix unit body is provided with a matrix unit bottom plate, and the matrix unit bottom plate is fixedly connected with the water sample monitoring port. A plurality of bottom plate water permeable holes are formed in the substrate unit bottom plate, a grid is arranged in the substrate unit body, a lifting groove is inserted into the grid, a plate is arranged on one side of the substrate unit body, a sliding rod is connected into the plate in a sliding mode, a plurality of water distribution holes are formed in the plate, and a plurality of water distribution holes are formed in the water distribution holes. The utility model has the beneficial effects that the matrix unit bottom plate, the sliding rod, the lock catch and the pulling rod are matched with one another, the up-and-down adjustment amount of the matrix unit bottom plate can be controlled, the matrix unit bottom plate can be fixed at a specific height by the lock catch, a matrix is poured above the matrix unit bottom plate, and the excessive matrix can be directly leveled.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a pullable in-situ sampling artificial wetland device. Background Art

[0002] Constructed wetlands are a treatment technology that mimics natural wetland ecosystems and is used for sewage treatment, water purification, and ecological restoration. Although artificial wetlands have the advantages of low construction costs and good ecological benefits, they occupy a large area and have high initial investment costs. In some cases, artificial wetlands may cause secondary pollution. For example, pollutants accumulated in the bottom mud may need to be cleaned and treated regularly, otherwise they may pose a new threat to the environment. In addition, once the artificial wetland is blocked, the filler needs to be dug out, cleaned, sorted, and re-landfilled, which requires high maintenance and management. In the existing vertical flow artificial wetland technology, the installation of artificial wetland fillers needs to be poured from the top of the frame and leveled after ensuring a certain height. Once overloading occurs, it needs to be taken out again. If it is leveled under pressure and the outer frame is not rigid enough, the device will also deform during the filling process. At the same time, if the outer frame of the unit is not destroyed, the corresponding layer of the matrix cannot be easily removed, which is not friendly to multi-matrix artificial wetlands.

[0003] According to a Chinese patent application with patent number CN117169460A, a device for continuous sampling and in-situ monitoring inside an artificial wetland is provided, in which the artificial wetland is divided longitudinally into a plurality of units, separated by a frame and a grid, and a handle is installed so that each unit can be extracted, and an in-situ monitoring cylinder for water sample monitoring is inserted in the center to facilitate sampling.

[0004] However, in this method, the substrates of different heights in each unit have peripheral walls and a bottom, which consumes a lot of grid materials. The shape of the grid wrapping the substrate is fixed, and the depth of the substrate cannot be changed at will. Different substrates need to be bundled before installation, and the process is relatively cumbersome. Therefore, based on the above-mentioned patent, the present invention simplifies the process of loading and removing the substrate as much as possible, explores the possibility of batch operation, and thus achieves the goal of large-scale generation of artificial wetland devices. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a pullable in-situ sampling artificial wetland device, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pull-out in-situ sampling artificial wetland device, comprising an outer frame, the bottom of the outer frame is fixedly connected to the bottom of the water sample monitoring port, a matrix unit body is arranged inside the outer frame, a matrix unit bottom plate is arranged at the bottom of the matrix unit body, a plurality of bottom plate water-permeable holes are opened inside the matrix unit bottom plate, a grid is arranged inside the matrix unit body, a lifting groove is inserted inside the grid, a plate is arranged on one side of the matrix unit body, a sliding rod is slidably connected to the inside of the plate, a plurality of water distribution holes are opened inside the plate, and a plurality of locking buckles are opened inside the plate.

[0007] Preferably, two corresponding traction handles are fixedly connected to the top of the base plate of the matrix unit, and the traction handles are made of stainless steel. The traction handles can be used to lift the base plate, thereby cooperating with the lock buckle and the tightening rod to fix the position of the base plate of the matrix unit.

[0008] Preferably, the base plate of the matrix unit is made of thick acrylic plate.

[0009] Preferably, the diameter of the water-permeable holes in the bottom plate is equal to the particle size of the bottommost layer of the matrix.

[0010] Preferably, the grid is made of stainless steel wire mesh, which is used for side water flow and is connected with steel pipes at the top and bottom.

[0011] Preferably, the lock buckle is a hollow or protruding triangular structure on the steel plate, and a tightening rod is fixedly connected to the outer side of the base plate of the matrix unit. The tightening rod is made of stainless steel and has a hinge structure. The base plate of the matrix unit can be fixed by the cooperation between the lock buckle and the tightening rod.

[0012] Preferably, a steel fence is provided inside the bottom of the water sample monitoring port. The bottom of the water sample monitoring port is made of thick sub-Gree plate or steel plate. The bottom of the water sample monitoring port is used to prevent aeration below and gas escape from the water sample monitoring port. The bottom of the water sample monitoring port made of thick sub-Gree plate or steel plate is sturdy and durable; the steel fence is connected to the bottom of the water sample monitoring port and supports two matrix units. The steel fence has high strength and is not easy to deform.

[0013] The utility model provides a pullable in-situ sampling artificial wetland device, which has the following beneficial effects:

[0014] 1. The pull-out in-situ sampling artificial wetland device can control the up and down adjustment amount of the substrate unit bottom plate through the mutual cooperation of the substrate unit bottom plate, the sliding rod, the locking buckle, and the tightening rod. The locking buckle will fix the substrate unit bottom plate at a specific height, and the substrate will be poured on the top. The excess substrate can be directly flattened, and then the locking buckle is released to lower the bottom plate to the next height, which is convenient for placing the next substrate, thereby improving the applicability of the pull-out in-situ sampling artificial wetland device.

[0015] 2. The pull-out in-situ sampling artificial wetland device has a bottom plate whose aperture is consistent with the particle size of the bottom matrix, and has no direct contact with the bottom of the outer frame. It is separated by a fence, and there is a non-porous bottom plate in the center of the fence as the bottom of the water sample monitoring port. A handle is installed on the upper frame of the outer frame for easy removal and cleaning. The outer frame enters the water from above or below according to the operating requirements. There is a traction handle at the bottom of the matrix unit, and the matrix can be taken out in layers in combination with the bayonet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the matrix unit body of the utility model;

[0018] Figure 3 This is a schematic diagram of the bottom of the water sample monitoring port of the utility model;

[0019] Figure 4 This is a schematic diagram of the base plate of the matrix unit of the present utility model;

[0020] Figure 5 A schematic diagram of a grid of the utility model;

[0021] Figure 6 It is a schematic diagram of the lock of the utility model.

[0022] In the figure: 1, outer frame; 11, matrix unit body; 12, plate; 101, traction handle; 102, matrix unit bottom plate; 103, bottom plate water permeable hole; 104, grid; 105, lifting groove; 106, slide rod; 107, water distribution hole; 108, lock; 109, tightening rod; 201, bottom of water sample monitoring port; 202, steel fence. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figures 1 to 6The utility model provides a technical solution: a pullable in-situ sampling artificial wetland device, comprising an outer frame 1, the bottom of the outer frame 1 is fixedly connected with the bottom 201 of the water sample monitoring port, a matrix unit body 11 is arranged inside the outer frame 1, a matrix unit bottom plate 102 is arranged at the bottom of the matrix unit body 11, a plurality of bottom plate water-permeable holes 103 are opened inside the matrix unit bottom plate 102, a grid 104 is arranged inside the matrix unit body 11, a lifting groove 105 is inserted inside the grid 104, a plate 12 is arranged on one side of the matrix unit body 11, a sliding rod 106 is slidably connected inside the plate 12, a plurality of water distribution holes 107 are opened inside the plate 12, and a plurality of lock buckles 108 are opened inside the plate 12;

[0025] Two corresponding traction handles 101 are fixedly connected to the top of the matrix unit bottom plate 102. The traction handles 101 are made of stainless steel. The traction handles 101 can be used to lift the bottom plate, thereby cooperating with the lock buckle 108 and the tightening rod 109 to fix the position of the matrix unit bottom plate 102;

[0026] The substrate unit bottom plate 102 is made of thick sub-Gree plate, the aperture of the bottom plate water permeable hole 103 is equal to the particle size of the bottom layer of the substrate, the grid 104 is made of stainless steel wire mesh, which is used for side water flow, and is connected by steel pipes at the top and bottom, and the lock buckle 108 is a hollow or protruding triangular structure on the steel plate. The outer side of the substrate unit bottom plate (102) is fixedly connected with a tightening rod (109), and the tightening rod 109 is made of stainless steel and a hinge structure. The substrate unit bottom plate 102 can be fixed by the mutual cooperation of the lock buckle 108 and the tightening rod 109;

[0027] A steel fence 202 is arranged inside the bottom 201 of the water sample monitoring port. The bottom 201 of the water sample monitoring port is made of thick sub-Gree plate or steel plate. The bottom 201 of the water sample monitoring port is used to prevent aeration below and gas from escaping from the water sample monitoring port. The bottom 201 of the water sample monitoring port made of thick sub-Gree plate or steel plate is sturdy and durable; the steel fence 202 is connected to the bottom 201 of the water sample monitoring port and undertakes two matrix units. The steel fence has high strength and is not easy to deform.

[0028] In summary, when the pullable in-situ sampling artificial wetland device is used:

[0029] Making the outer pool of artificial wetland: Use polyethylene material to make an outer pool with a length of 1.5 meters, a width of 1 meter, and a depth of 1.2 meters;

[0030] Constructing rectangular outer frames: Use stainless steel materials to build four rectangular outer frames with a length of 0.65 meters, a width of 0.35 meters, a depth of 0.8 meters, and a height of 0.2 meters from the ground, and place them in the outer tank body. Lay out aeration pipes and sewage pipes under the frames;

[0031] Design of matrix unit: Each outer frame contains two matrix units, each unit is 0.3 meters long, 0.3 meters wide and 0.8 meters deep. After the two units are combined, a water sample monitoring area with a diameter of 0.1 meters is left in the middle. The concave side of the matrix unit has water distribution holes every 0.2 cm deep, with a hole diameter of 1 cm. The bottom plate hole diameter is 2.5 cm. The side grid design porosity is more than 50%;

[0032] Designed water flow direction: gravity flow is adopted, with water flowing downward first and then upward. The first two groups of frames are the downward section, with a total depth of 0.75 meters inside the matrix; the last two groups of frames are the upward section, with a total depth of 0.55 meters, and water outlets are set at corresponding heights. A water distribution system is set at the upper end of one side of the outer frame of the downward section, and the water flows into the water inlet of the upward section from the drainage system set at the lower end of the other side;

[0033] Filling matrix layer: The matrix layer consists of a surface gravel layer (particle size 3-5 cm), a middle ceramsite layer (particle size 1-2 cm) and a bottom crushed stone layer (particle size 3-5 cm). It is sieved through a sieve before use to ensure uniform particle size. The height of each layer of the matrix of 8 matrix units is positioned by a tightening rod. After filling, it is placed in the outer frame and the central tube perforations are aligned;

[0034] Operation and monitoring: The artificial wetland should be cultivated and biofilm should be formed for no less than 30 days. During operation, the aeration system and sewage system should be checked regularly to ensure that there is no blockage or leakage. Water samples should be collected from the water sample monitoring area every week to measure the chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP) and other indicators of the inlet and outlet water to evaluate the treatment efficiency. The matrix unit should be extracted every 2 to 3 months, the matrix should be taken out in layers and the growth of microorganisms should be tested, and the mud should be discharged. According to the monitoring results, the matrix layer structure or aeration volume should be adjusted to optimize the treatment effect;

[0035] Aquaculture tailwater contains a lot of nitrogen, phosphorus and organic matter. The artificial wetland system is 1m 3 / d of water was used to treat aquaculture tail water, and it was operated for a total of 150 days. The aquaculture tail water treated by this system met the "Aquaculture Tail Water Discharge Standards". The usage results are shown in Table 1.

[0036] Table 1 Changes in tailwater quality in and out of the wetland

[0037] parameter Raw water quality Outlet water quality Total nitrogen (TN) mg / L 4.47 1.98 Total phosphorus (TP) mg / L 0.75 0.42 <![CDATA[COD cr mg / L]]> 30.40 18.20

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pullable in-situ sampling artificial wetland device, comprising an outer frame (1), characterized in that: The bottom of the outer frame (1) is fixedly connected to the bottom of the water sample monitoring port (201); a matrix unit body (11) is arranged inside the outer frame (1); a matrix unit bottom plate (102) is arranged at the bottom of the matrix unit body (11); a plurality of bottom plate water-permeable holes (103) are provided inside the matrix unit bottom plate (102); a grid (104) is arranged inside the matrix unit body (11); a lifting groove (105) is inserted inside the grid (104); a plate (12) is arranged on one side of the matrix unit body (11); a sliding rod (106) is slidably connected inside the plate (12); a plurality of water distribution holes (107) are provided inside the plate (12); and a plurality of locking buckles (108) are provided inside the plate (12).

2. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: Two corresponding traction handles (101) are fixedly connected to the top of the matrix unit bottom plate (102), and the traction handles (101) are made of stainless steel.

3. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: The matrix unit bottom plate (102) is made of a thick acrylic plate.

4. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: The diameter of the water-permeable holes (103) of the bottom plate is equal to the particle size of the bottommost matrix.

5. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: The grid (104) is made of stainless steel wire.

6. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: The lock buckle (108) is a hollow or protruding triangular structure on a steel plate. A tightening rod (109) is fixedly connected to the outer side of the matrix unit bottom plate (102). The tightening rod (109) is made of stainless steel and a hinge structure.

7. The pullable in-situ sampling artificial wetland device according to claim 1, characterized in that: A steel fence (202) is arranged inside the bottom (201) of the water sample monitoring port, and the bottom (201) of the water sample monitoring port is made of a thick sub-Gree plate or a steel plate.

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