CN205472961U - Filler belt cleaning device for constructed wetland - Google Patents

Abstract

The utility model provides a filler cleaning device for artificial wetland, which includes a wetland box filled with ceramsite filler, the cleaning device includes electric paddles, throat pipes, hollow shafts, motors, mud discharge pipes and vacuum pumps, and the electric paddles are connected At the end of the throat, the throat is installed on the hollow shaft, the end of the hollow shaft is connected to the motor, the end of the throat is connected to the mud discharge pipe, the mud discharge pipe is provided with a vacuum pump, and the head of the cleaning device is provided with a filter screen cover. The utility model provides a new option for anti-clogging of subsurface flow artificial wetlands, and is suitable for cleaning and maintenance of artificial wetlands.

Description

Filling cleaning device for artificial wetland

technical field

The utility model belongs to the technical field of environmental engineering, in particular to a filler cleaning technology for artificial wetlands.

Background technique

Constructed wetlands in a broad sense refer to wetlands artificially built by humans for production, living, disaster prevention, sewage treatment, etc. It takes human interests as the main goal and social services as the main function. It can not only be used for sewage treatment, but also can be used to create landscapes and restore natural wetlands, so it can be called "functional artificial wetlands". Constructed wetlands in a narrow sense are sewage treatment systems in constructed wetlands. Constructed wetland sewage treatment system is an artificially constructed, controllable and artificial wetland system, which is designed and constructed to treat sewage through an optimized combination of physical, chemical and biological actions in the wetland natural ecosystem.

Sewage treatment constructed wetland systems are generally divided into surface flow wetlands and subsurface flow wetlands. Surface flow wetlands are very similar to surface flow land treatment systems. The water surface is above the surface of the solid medium, and sewage flows horizontally from the inlet end of the pool to the constructed wetland at the outlet end. The difference between subsurface flow constructed wetlands and surface flow wetlands is that the interior is filled with artificial fillers, and water passes through the gaps in the fillers. According to the form of water flow, they can be divided into vertical flow subsurface flow constructed wetlands and horizontal flow subsurface flow constructed wetlands.

Due to the advantages of high treatment efficiency and thermal insulation effect, subsurface flow wetlands are the core of the constructed wetland sewage treatment system. The purification of water by subsurface wetlands is the result of the joint action of fillers, plants and microorganisms, among which fillers are the most critical factor for the decontamination effect of subsurface wetlands. Due to the limited gaps of the filler, after the long-term treatment of sewage in subsurface flow wetlands, the fillers are prone to clogging due to microbial death, plant root residues, etc., which eventually leads to a decline in the treatment capacity of the constructed wetland, sewage overflows from the surface of the bed, and the wetland eventually fails. Practice has shown , The blockage period of subsurface wetlands is generally 3 to 5 years. After the subsurface flow wetland is blocked, the bed packing needs to be cleaned. Because the general subsurface flow wetland uses gravel or gravel as the filler, the density is high, and because the impermeable membrane is often laid at the bottom of the wetland, the thickness of the filler is only about 1m, and the bearing capacity of the foundation is small. , It is difficult to use mechanical operations such as excavators. The realistic method for cleaning is to use manual excavation, transport by two-wheel bucket trucks, and manually backfill the drum after cleaning. The whole process is time-consuming and labor-intensive, and the cost is high.

At present, there are very few researches on the cleaning of subsurface wetland fillers at home and abroad. There are patents to increase backwashing pipelines and equipment, but due to the huge amount of flushing water, the investment in flushing pipelines and equipment is high, the operation is very complicated, and the feasibility is very poor, which has obvious disadvantages. .

Utility model content

The first technical problem to be solved by the utility model is to provide a filler cleaning device for artificial wetlands, which can solve the time-consuming and labor-intensive problems caused by manual cleaning of artificial subsurface flow wetlands, while simplifying the system structure and saving cleaning costs.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a filler cleaning device for artificial wetlands, including a wetland box, the wetland box is filled with ceramsite filler, and the cleaning device includes electric paddles, throats, hollow Shaft, motor, mud discharge pipe and vacuum pump, the electric paddle is connected to the end of the throat pipe, the throat pipe is installed on the hollow shaft, the end of the hollow shaft is connected to the motor, and the end of the throat pipe is connected to the exhaust pipe A mud pipe, the mud discharge pipe is provided with a vacuum pump, and the head of the cleaning device is provided with a filter screen cover. When cleaning, the front end of the cleaning device extends into the middle of the wetland.

While adopting the above-mentioned technical solution, the utility model can also adopt or adopt the following further technical solutions in combination:

The cleaning device also includes an operating handle, and the operating handle is further provided with a fixed bracket, and the fixed bracket extends to the outer wall of the hollow shaft.

The wetland box is provided with a wetland water inlet pipe and a wetland water outlet pipe, the wetland water inlet pipe is located upstream of the wetland box, the wetland water outlet pipe is located downstream of the wetland box, and the bottom of the wetland box is provided with an anti-seepage layer, and the anti-seepage layer is arranged in steps from upstream to downstream.

The ceramsite filler is a lightweight ceramsite filler, the ceramsite of the light ceramsite filler is spherical or ellipsoidal, the ceramsite is provided with a ceramsite or enamel shell, and the interior of the ceramsite is honeycomb. And it has a plurality of non-connected closed micropores, and gas is wrapped in the micropores.

The wetland box is provided with a maintenance structure top, the elevation of the maintenance structure top is at least 1.5m higher than the height of the wetland bed, and the hollow shaft, electric paddle and throat are located on the maintenance structure top during cleaning Inside.

The mesh area of the filter screen cover is smaller than the particle diameter of filler ceramsite, and larger than the particle diameter of impurities.

The hollow shaft is provided with a motor transmission shaft, the motor transmission shaft passes through the throat to connect and drive the electric paddle, the end of the throat is provided with an isolation plate, and the isolation plate is provided with a power supply The motor hole through which the shaft passes and the mud discharge hole communicated with the mud discharge pipe, the motor hole is provided with a sealing shaft sleeve.

The beneficial effect of the utility model is: the utility model provides a kind of subsurface wetland cleaning method and corresponding device based on ceramsite filler for the problem of subsurface flow wetland blockage and the shortcomings of traditional solutions. The new type of cleaning device can easily clean the wetland filler, prevent clogging and restore the function of the wetland. The utility model is easy to operate, low in cost, not easy to damage the anti-seepage layer and the water collection and distribution pipes, avoids the time-consuming and labor-intensive cleaning of the traditional manual bed turning, and does not need to set up a complicated backwashing system. The utility model provides a new option for anti-clogging of the subsurface artificial wetland, and is suitable for cleaning and maintenance of the artificial wetland.

Description of drawings

Figure 1 Schematic diagram of normal operating conditions.

Figure 2 Schematic diagram of cleaning conditions.

Fig. 3 Structural diagram of the cleaning device.

detailed description

Refer to attached picture.

A filler cleaning device for artificial wetlands of the present invention includes a wetland box 8 filled with ceramsite filler 16, the wetland box 8 is a place where subsurface flow wetlands play a role, and the wetland box can be built by traditional building materials , such as brick masonry, block stone masonry, concrete masonry, etc., but must be anti-seepage, specific anti-seepage measures can be laid anti-seepage membrane, use anti-seepage cement mortar, anti-seepage concrete, mixing inorganic anti-seepage agent, etc. The inside of the wetland box is filled with artificial filler, water inlet, water collection pipes and control valves are installed, and aquatic plants are planted on the surface of the filler. The above content is no different from the design and construction of general subsurface flow wetlands. The only difference is that the top elevation of the enclosure structure of the wetland box in the utility model should be 1.5 meters or more higher than the surface elevation of the artificial filler, while the top elevation of the enclosure structure of the general subsurface flow wetland It is only about 0.5 meters above the surface elevation of the artificial filler.

For subsurface wetlands, there are various sources of fillers, generally gravel, gravel, limestone, ceramsite, volcanic rock, zeolite, steel slag, etc. The underflow wetland in the utility model all adopts lightweight ceramsite, and ceramsite is exactly the particle of pottery. Most of the appearance characteristics of ceramsite are sphere or ellipsoid, and its surface is a hard shell, which is made of pottery or glaze, which has the function of water-proof and air-retaining, and gives ceramsite high strength. Lightness is the most important point among many excellent properties of ceramsite. The internal structure of ceramsite is characterized by fine and dense honeycomb micropores. These micropores are closed rather than connected. It is because the gas is wrapped in It is formed in the shell, which is the main reason for the light weight of ceramsite. According to different types of subsurface flow wetlands, the particle size of ceramsite is also different. Generally, the particle size of ceramsite used in vertical flow wetlands is 5-20mm, and that used in horizontal flow wetlands is 20-40mm.

The wetland box 8 is provided with a wetland water inlet pipe 12 and a wetland water outlet pipe 13, the wetland water inlet pipe 12 is located upstream of the wetland box 8, and the wetland water outlet pipe 13 is located downstream of the wetland box 8. The bottom of the wetland box 8 is provided with an anti-seepage layer 17, the anti-seepage layer 17 is arranged in steps from upstream to downstream, the elevation of the wetland water inlet pipe 12 is higher than the elevation of the wetland water outlet pipe 13,

The cleaning device is composed of seven parts, which can simultaneously satisfy functions such as bed agitation, sewage suction, packing cleaning, and packing separation, and can protect the wetland anti-seepage layer, water collection and distribution pipes, etc. during the cleaning process.

The cleaning device includes an electric paddle 2, a throat 3, a hollow shaft 4, a motor 5, a mud discharge pipe 6 and a vacuum pump 7, the electric paddle 2 is connected to the end of the throat 3, and the throat 3 is installed on On the hollow shaft 4, the end of the hollow shaft 4 is connected to the motor 5, the end of the throat pipe 3 is connected to the mud discharge pipe 6, the mud discharge pipe 6 is provided with a vacuum pump 7, and the head of the cleaning device is provided with Filter screen cover 1 is arranged, and when cleaning, the front end of described cleaning device stretches into wetland middle part.

The filter screen cover 1 is located at the front end of the entire cleaning device. It is made of hard PVC material or stainless steel and has a convex surface. Its main function is to isolate the filler from the internal blades and at the same time play the role of passing water. The filter screen cover is detachably installed at the end of the throat It is easy to clean and replace, and the mesh aperture is less than 5mm, which can block the ceramsite filler particles.

The hollow shaft 4 is connected to the throat pipe 3 and the motor 5, the hollow shaft 4 is provided with a motor drive shaft, and the motor drive shaft passes through the throat pipe 3 to connect and drive the electric paddle 2, and the throat pipe 3 The end is provided with an isolation plate, and the isolation plate is provided with a motor hole through which the power supply shaft passes and a mud discharge hole connected with the mud discharge pipe 6, and a sealing sleeve is provided in the motor hole to prevent it from being sucked into the throat. The sludge slurry in the pipe flows into the hollow shaft 4 .

The throat pipe 3 is located at the center of the paddle, and is a pipe section with a similar size. The electric motor 5 is used to drive the electric paddle 2 and is arranged at the end of the hollow shaft 4 . The mud discharge pipe 6 is a flexible pipe, which connects the throat pipe 3 and the vacuum pump 7. When the sludge water is sucked from the throat pipe 3, the sludge water is exported by the suction of the vacuum pump 7. The vacuum pump 7 is used to provide the power for sludge water discharge.

The cleaning device also includes an operating handle 9, and the operating handle 9 is also provided with a fixed bracket 10, and the fixed bracket 10 extends to the outer wall of the hollow shaft 4, and the fixed bracket 10 and the hollow shaft 4 Rotary bearings 11 are provided between them. The fixed bracket 10 can be in the form of three brackets, which form a triangular section on the outer surface of the hollow shaft 4. The sections of the three brackets are all tapered with a small outside and a large inside, which is convenient for stirring, or the fixed bracket is in the shape of a round tube. The outer surface of the circular tubular fixing bracket is provided with a helical groove, and the helix angle of the helical groove is consistent with the helix angle of the electric propeller, when the groove width of the helical groove is consistent with the packing diameter of the ceramsite filler. During operation, the spiral groove with the same stirring angle as the electric paddle can make the stirring smoother, and the width of the groove is consistent with the size of the filler diameter, so that the filler particles can flow along the spiral groove, while other impurities will be absorbed Excluded, this structural design, on the one hand, will save more effort in stirring, on the other hand, most of the filler particles that need to be retained can roll and flow along the agitation of the fixed bracket, and will not stay on the surface of the filter screen cover, but need to be removed. The impurities cleaned out will not flow along the fixed bracket, and are easily sucked out by the cleaning device.

The wetland box is provided with a maintenance structure roof 14, and the elevation of the maintenance structure roof 14 is about 1.5m higher than the elevation of the wetland bed surface, which can meet the demand for high water storage and provide pressure difference for the ceramsite filler to float up and the bed to loosen .

In practical application, firstly, according to the blockage of the bed, the vegetation on the surface of the wetland is manually removed, and the outlet valve of the bed that needs to be cleaned is closed, and then the water is continuously fed in, so that the water level of the bed is consistent with the elevation of the top of the wetland box maintenance structure. Under the action of the water level pressure difference, the lightweight ceramsite filler starts to float up, and the whole bed is in a loose state. Part of the impurities between the plugged fillers dissolves in the water, part of them floats up, and part of them sinks. The operator stands on the top of the maintenance structure, inserts the front part of the cleaning device into the filler, turns on the motor and the vacuum pump, driven by the motor, the paddles start to rotate to generate suction, and at the same time, the worker starts to move the cleaning device horizontally, up and down, The bed is stirred, and wherever it goes, the impurities between the fillers are sucked into the isolation net cover along with the water body, and the ceramsite filler is still left in the bed due to the isolation of the aperture of the isolation net cover, and the sludge mixed with impurities The water is discharged from the bed through the throat pipe and the mud discharge pipe. According to the severity of clogging and the concentration of sludge water, a bed can be cleaned multiple times or only once. Since the sludge water is continuously pumped out of the bed during the cleaning process, it is necessary to maintain continuous water inflow, but the water level cannot exceed the top elevation of the maintenance structure. After cleaning, lower the bed water level to the normal operating water level, open the water outlet valve, and the wetland will resume normal operation.

During the cleaning process, the water needs to be continuously replenished to ensure that the water level in the wetland box is always kept at the cleaning water level when the sludge slurry is sucked out. B in the figure is the cleaning water level.

When cleaning, the wetland box adjusts the height of the water storage to the highest level, and the ceramsite filler in the wetland bed is suspended through the water pressure difference, and the bed is loose, and then manually operated horizontally or up and down, and the paddle is driven by the motor on the cleaning device. Negative pressure is generated to suck in the sludge water, and the sludge water is discharged through the throat connecting the sludge discharge pipe and the vacuum pump. At the same time, the ceramsite filler is blocked by the filter screen cover at the head of the cleaning device and remains in the wetland box.

Claims (7)

1. an artificial swamp padding washing device, including wetland box, it is characterized in that: in described wetland box, fill ceramics filling, described cleaning device includes electronic blade, trunnion, quill shaft, motor, discharge pipeline and vacuum pump, described electronic blade is connected to throats end, described trunnion is arranged on quill shaft, described hollow the tip of the axis connects motor, described trunnion end connects described discharge pipeline, described discharge pipeline is provided with vacuum pump, the head of described cleaning device is provided with filtering screen, and when cleaning, the front end of described cleaning device is stretched in the middle part of wetland.

2. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterized in that: described cleaning device also includes operating handle, being additionally provided with fixed support on described operation handle, described fixed support extends on the outer wall of quill shaft, is provided with rolling bearing in described quill shaft.

3. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterized in that: in described wetland box, be provided with wetland water inlet pipe and wetland effluent pipe, described wetland water inlet pipe is in the upstream of described wetland box, described wetland effluent pipe is in the downstream of described wetland box, described wetland cassette bottom portion is provided with impervious barrier, and described impervious barrier is ladder-like arranged from upstream to downstream.

4. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterized in that: described ceramics filling is light ceramic filler, the haydite of described light ceramic filler is spherical in shape or elliposoidal, described haydite is provided with the shell of ceramic or enamel, in cellular inside described haydite, and there is multiple unconnected enclosed type micropore, it is enclosed with gas in described micropore.

5. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterized in that: described wetland box is provided with enclosed structure top, the elevation on the described enclosed structure top height than wetland bed exceeds at least 1.5m, and described quill shaft, electronic blade and trunnion are positioned at described enclosed structure top when cleaning.

6. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterised in that: the mesh area of described filtering screen is less than the granule footpath of filler haydite, and is more than the granule footpath of impurity.

7. a kind of artificial swamp padding washing device as claimed in claim 1, it is characterized in that: in described quill shaft, be provided with motor transmission shaft, described motor transmission shaft connects through described trunnion and drives described electronic blade, described trunnion end is provided with division board, described division board is provided with the motor hole that power supply arbor passes and the mudhole connected with described discharge pipeline, is provided with sealing axle sleeve in described motor hole.