CN201027186Y - Submerged flow artificial wetland anti-clogging water distribution device - Google Patents

Abstract

The subsurface flow constructed wetland anti-clogging water inflow distribution device relates to a method and device for separating and distributing water in a constructed wetland. Groove (1-3), grid (1-4), gravel area (1-5), porous cloth water flower wall (1-6); among them, the upper part of the water inlet surface of the water collection and sedimentation tank (1-3) A perforated pipe (1-1) is provided, and an anti-impact baffle (1-2) is provided in the water collection and sedimentation tank (1-3) facing the entrance of the perforated pipe (1-1). The other side of 1-3), that is, the upper part of the water outlet surface is provided with a grille (1-4) and is connected with the water inlet surface of the gravel area (1-5) next to the water collection and sedimentation tank (1-3), and the gravel area ( The water outlet surface of 1-5) is provided with a porous cloth water flower wall (1-6), and the outside of the porous cloth water flower wall (1-6) is the water outlet surface of the distributor. Through the flow distribution of the device, the water inflow of the artificial wetland is evenly distributed in the full width and full depth, so as to ensure the normal operation of the wetland system.

Description

Submerged flow artificial wetland anti-clogging water distribution device

technical field

The utility model relates to a method and device for separating and distributing water inflow to artificial wetlands, and belongs to the technical field of environmental protection equipment manufacturing.

Background technique

Constructed wetland is a new type of ecological sewage treatment technology, which is suitable for sewage treatment in large, medium and small towns and rural areas in my country. It not only has good organic matter removal effect, but also has high phosphorus and nitrogen removal functions. In addition, it also has excellent characteristics such as convenient operation and management and low engineering cost. However, judging from the existing engineering practice, due to the uneven distribution of influent water flow, the short flow, bias flow and channel flow of the water flow in the constructed wetland have greatly reduced the available space of the constructed wetland, which in turn has affected the load and capacity of the constructed wetland. processing effect. Moreover, a large amount of suspended matter in the incoming water enters the constructed wetland due to poor separation, which can easily cause blockage of the wetland, especially the head of the wetland, greatly reduce the hydraulic conductivity, reduce the hydraulic load, or cause surface fluidization of the subsurface flow wetland. According to the survey of more than 100 operating constructed wetlands by the US Environmental Protection Agency, nearly half of the constructed wetland systems have become clogged within 5 years of being put into use. Excessive blockage leads to poor hydraulic circulation in the wetland, reduced treatment effect, and shortened operating life, so repair measures have to be taken.

The clogging process of constructed wetland is essentially the process of reducing the effective porosity. In the wetland intake area, the hydraulic conductivity is reduced and the residence time is shortened due to the accumulation of solid particles brought into the wetland. The research on the water intake area of the constructed wetland shows that the accumulation of organic matter in the constructed wetland is mainly on the surface and the filling layer with a depth of more than 100mm. Therefore, adding an anti-clogging water inlet distributor in the water inlet area of the constructed wetland can not only prevent or greatly reduce the blockage of the wetland, but also make the water flow evenly distributed, thereby greatly improving the use function and operation stability of the constructed wetland. Processing technology and further popularization and application are of great significance.

The utility model aims at the above-mentioned problems of the constructed wetland, and proposes an anti-clogging constructed wetland water inlet distributor.

Contents of the invention

Technical problem: The utility model provides an anti-clogging water inflow distribution device for subsurface flow constructed wetlands, aiming at the problems of clogging and uneven distribution that often occur in the above-mentioned constructed wetlands. Through the flow distribution of the device, the water inflow to the constructed wetland is evenly distributed in the full width and depth; at the same time, the inorganic sediment, floating matter and coarse organic matter in the water are controlled to enter the wetland, so as to solve the problem of local accumulation of organic matter and reduce the pollution of the wetland. The chance of blockage is guaranteed to ensure the normal operation of the wetland system.

Technical solution: The anti-clogging water inlet distribution device of the submerged artificial wetland of the utility model includes a perforated pipe, an anti-impact baffle, a water collection and sedimentation tank, a grid, a gravel area, and a porous cloth water flower wall; among them, in the water collection and sedimentation tank There is a perforated pipe on the upper part of the water inlet surface, and an anti-shock baffle is provided at the entrance of the perforated pipe in the water collection and sedimentation tank. The water inlet surface of the gravel area next to the sedimentation tank is connected, and the water outlet surface of the gravel area is provided with a porous cloth spray wall, and the outside of the porous cloth water flower wall is the water outlet surface of the distributor. The upper and lower sides of the outer surface of the perforated pipe are alternately provided with through holes.

Perforated pipes are set in the water inlet area to make the incoming flow evenly distributed along the width direction, avoid excessive concentration of water inlet streamlines, reduce local impact, and facilitate the sedimentation and separation of inorganic matter and particulate organic matter.

The anti-shock baffle is set according to the width of the water collection and sedimentation tank, which can play a role of diversion, change the direction of water flow, increase the flow, effectively prevent the phenomenon of short flow of incoming water, and make most of the suspended matter in the incoming water sink under the action of gravity and centrifugal force. The mud bucket at the bottom of the tank promotes the separation of mud and water.

Too much inorganic and organic suspended matter of a certain particle size in wastewater tends to clog the wetland front, which must be sequestered and settled. The water collection and sedimentation tank is set along the full width of the wetland. The sewage flows vertically. Inorganic and organic suspended matter are isolated and precipitated in the tank, which can avoid or greatly slow down the clogging process.

The grid is set in the middle and upper part of the outlet weir of the water collection and sedimentation tank, along the entire width of the wetland. It mainly removes large floating objects in the effluent of the water collection and sedimentation tank.

The gravel area is evenly filled with gravel of a certain size, which can control the flow rate of water and reduce kinetic energy, and at the same time ensure the cross-section uniformity of the wetland water intake.

The porous cloth water splash wall is set along with the full width of the wetland, and the holes are evenly distributed from top to bottom to control the uniform distribution of water inflow to the wetland, ensure that the wetland water flows out in parallel flows, and ensure the stable and reliable operation of the wetland system.

Beneficial effect:

1) The utility model arranges a water collection sedimentation tank and a grid at the front end of the wetland, so that the inorganic and organic suspended matter, floating matter, and sediment of a certain size in the incoming water that may cause the blockage of the wetland are isolated and precipitated in the distributor. Reduce the local accumulation concentration so that it will not enter the artificial wetland treatment section and cause blockage, or slow down the wetland blockage process and prolong the wetland operation life;

2) The utility model is used as the water inlet distributor of the artificial wetland, through the porous pipe and the water distribution flower wall, it can achieve the effect of concentrated inflow and distributed inflow, so that the artificial wetland can evenly distribute water in the full width and full depth direction;

3) The utility model adopts the water-collecting sedimentation tank and the grid to remove the floating matter and sediment that are concentrated on the surface of the sedimentation tank or deposited on the bottom of the tank to facilitate regular removal, and the operation and maintenance are simple;

4) The utility model organically integrates the water-collecting sedimentation tank, the grille and the wetland treatment section, which greatly reduces the workload of the wetland project, is convenient and practical, and has great significance for the further popularization and application of the artificial wetland technology.

Description of drawings

Figure 1 is the general plan of the constructed wetland, including three parts: water inlet area 1, treatment area 2, and water outlet area 3.

Figure 2 is a plan view of the anti-clogging constructed wetland water inlet distributor.

Fig. 3 is the elevation view of the anti-clogging constructed wetland water inlet distributor.

Fig. 4 is a plan view of the water distribution device of the perforated pipe 1-1.

Fig. 5 is a structural diagram of grids 1-4.

Fig. 6 is a structural diagram of porous cloth splash wall 1-6.

Among them are perforated pipe 1-1, anti-shock baffle 1-2, water collection and sedimentation tank 1-3, sludge discharge pipe 1-3-1, grid 1-4, gravel area 1-5, porous cloth water splash wall 1-6.

Detailed ways

The utility model is an anti-clogging water distribution device for a submerged artificial wetland, which includes six parts: a perforated pipe, an anti-impact baffle, a water-collecting sedimentation tank, a grid, a gravel area, and a porous cloth spray wall.

Wherein, a perforated pipe 1-1 is provided on the upper part of the water inlet surface of the water collection and sedimentation tank 1-3, and an anti-impact baffle 1-2 is provided in the water collection and sedimentation tank 1-3 facing the entrance of the perforated pipe 1-1. , on the other side of the water collecting and settling tank 1-3, that is, the upper part of the water outlet surface is provided with a grid 1-4 and communicates with the water inlet surface of the gravel area 1-5 next to the water collecting and settling tank 1-3, and the gravel area 1-5 The water outlet surface of 5 is provided with porous cloth water flower wall 1-6, and the outside of porous cloth water flower wall 1-6 is the water outlet surface of this distributor. The upper and lower sides of the outer surface of the perforated pipe 1-1 are alternately provided with through holes.

The perforated pipe is set at the front end of the water inlet distributor, and the length is determined along the width of the water inlet distributor, so that the incoming flow is evenly distributed along the width direction and reduces local impact. The diameter of the perforated pipe is 20-100 mm according to the flow rate, and it is made of PVC, and holes are uniformly perforated on it. The aperture is 5-15 mm, and the perforation rate is 50%. The two ends of the perforated pipe are closed, and the middle part is connected with the water inlet valve by a tee.

The anti-shock baffle is set along the width direction of the water collection and sedimentation tank, with a height of 0.90m, and the top is flush with the water collection and sedimentation tank, which can prevent short flow and retain part of the floating substances in the sewage, and at the same time play a role of diversion.

The water collection and sedimentation tank is set at the front of the wetland, and is set according to the width of the wetland. According to the calculation of the maximum design velocity of the vertical flow grit chamber and the maximum cross-sectional velocity of the wetland, the width of the water collection and sedimentation tank is 0.4-0.5m. The total height of the water collection and sedimentation tank is 1.5m, of which the effective water depth of the sedimentation zone 1-3-1 is 1.0-1.1m, and the depth of the sludge zone 1-3-2 is 0.4-0.5m. The inclination angle on both sides of the mud hopper in the sludge area is 60°, and the bottom is provided with a mud discharge pipe along the width direction, and the mud is regularly pumped and discharged.

The grid is set at the water outlet of the water collection and sedimentation tank, and is set along the width direction of the wetland. Considering the super height of the water collection and sedimentation tank, the top of the grille is located about 0.10m below the top of the water collection and sedimentation tank to ensure that the water from the water collection and sedimentation tank overflows into the wetland at a certain water level. The recommended height of the grid is 0.25m, and the net width of the grid spacing is 10mm, made of PVC or steel bars.

The sewage enters the gravel area 1-5 at the front of the wetland from the water collection and sedimentation tank through the grid. The length of the gravel zone is 0.5m, and the gravel is evenly filled in the zone, and the particle size of the gravel is 30-40mm.

The porous cloth splash wall is built behind the wetland gravel area and is set according to the width of the wetland. The porous cloth splash wall is made of 100mm thick PVC board or 80-120mm thick concrete board. The porosity of the porous cloth splash wall is not less than 50%, so as to ensure the water collection rate and reduce the resistance loss along the way.

Claims (2)

1. a subsurface constructed wetland anti-clogging plug inlet distribution device is characterized in that this sparger comprises perforated pipe (1-1), protecting against shock baffle plate (1-2), the settling bath that catchments (1-3), grid (1-4), gravel district (1-5), porous water distribution tracery wall (1-6); Wherein, top at the water entering surface of the settling bath that catchments (1-3) is provided with perforated pipe (1-1), the import that faces perforated pipe (1-1) in the settling bath that catchments (1-3) is provided with protecting against shock baffle plate (1-2), be provided with grid (1-4) on the top that the another side of the settling bath that catchments (1-3) promptly goes out the water surface and the water entering surface in the gravel district (1-5) other with being positioned at the settling bath that catchments (1-3) is communicated with, the water surface that goes out in gravel district (1-5) is provided with porous water distribution tracery wall (1-6), and the outside of porous water distribution tracery wall (1-6) is the water surface that of this sparger.

2. subsurface constructed wetland anti-clogging plug inlet distribution device according to claim 1 is characterized in that the staggered through hole that is provided with in both sides up and down of perforated pipe (1-1) outside surface.

Images