CN204897690U - Drying bed that bed mud was dealt with is dredged in river course or lake - Google Patents

Abstract

The utility model discloses a drying bed that bed mud was dealt with is dredged in river course or lake, the bed mud drying bed is provided with all around and encloses low bank between fields (1), it is equipped with prevention of seepage geomembrane (2) to enclose low bank between fields (1) inside wall, layer (8) is stored up from the bed mud that the bottom up was equipped with french drain barrier layer (3), french drain (4), mud mattress layer (6), mud bed filter layer (7) in proper order and was used for stacking the bed mud to the bed mud drying bed, be equipped with filtration liquid collecting pipe (5) in french drain (4). This sludge drying field is arranged in stacking and clears up the bed mud of coming out with handling from river course or lake, makes it not lead to the fact the pollution to the environment to can reuse.

Description

The drying bed of sediment is dredged in a kind of river course or lake

Technical field

The utility model belongs to river and lake pollution administers field, refers to the drying bed dredging sediment in a kind of river course or lake further.

Background technology

River course is the important carrier of civilization continuity and Economic development, and being the important component part of harmony between man and nature coexistence, is also one of mark of city quality.In recent years, along with China's economic liftoff, urbanization paces are accelerated, and cities and towns blowdown flow rate increases, and many town rivers are subject to severe contamination, black smelly outstanding problem.

The primary pollution source in river course or lake is: 1. sanitary sewage; 2. rainwash; 3. domestic refuse; 4. pollution form construction; 5. polluted bed mud.Be embodied in: littoral sanitary sewage is seriously omitted in printing, and part of contaminated water directly enters river; River water poor fluidity, water quality deterioration; Embankment population hardening, lacks ecological property; It is high that domestic refuse enters river rate; Building waste water, waste material enter river; Ecosystem degradation etc.

Due to above-mentioned environmental problem, the bed mud in river and lake is caused to deposit seriously.What form due to bed mud and river is the balanced body of a two-phase, and pollutent interacts between, affect; If pollution concentration is too high in bed mud, the pollutent in bed mud certainly will be caused to discharge, affect water quality.

Especially some river alongshore has the area of industry park, and it mainly pollutes for organic matter, TP, TN, Cu, Pb, Zn, Cd, Cr etc.

The pollutent produced in the alluvial deposit that river or bottom mud in lake mainly bring from river and soil erosion around and industrialization in recent years and Development of China's Urbanization, from some sampling sample analysis result, the superiors are by people's Activity Effects in recent years and the sediment layer produced, because the time formed is shorter, water ratio is higher, and density and hardness is relatively little.Sediment layer is the relatively large sediment layer of one deck density, hardness that silt, pollution substance and some impurity in effluent stream and lake are formed through depositing for many years in river bed.

One of major measure of river course or Water Environment In Lakes comprehensive improvement is dredged river course or bottom mud in lake exactly, and river course or lake dredging play positive effect in river course or lake treatment process.At present, the dredging method in river course or lake is comprised drain that pool is manually dredged, not drainage machinery dredging, slush pump hydraulicking unit do pool dredging, Jet Dredging dredger dredging, air-powered pump desilting etc.

But the bed mud of cleaning process does not at present process substantially, is generally direct stacking, or direct landfill disposal, secondary pollution is caused to environment.

Utility model content

For the deficiencies in the prior art, the purpose of this utility model be to provide a kind of there is special construction design a kind of river course or lake dredge the drying bed of sediment, for stacking and processing the bed mud cleared from river course or lake, make it not to environment, and can again utilize.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

The drying bed of sediment is dredged in a kind of river course or lake, described bed mud drying bed surrounding is provided with encloses low bank between fields, the described low bank between fields inner side-wall that encloses is provided with anti-seepage geomembrane, described bed mud drying bed is up provided with french drain impervious barrier, french drain, mud mattress layer, mud bed filtering layer and the bed mud for stacking bed mud successively and stores up layer from bottom, be provided with leachate collection pipe in described french drain.

Described enclose low bank between fields be preferably knitting bagged soil ramp type enclose low bank between fields.

Described anti-seepage geomembrane is preferably polypropylene anti-seepage geomembrane.Described anti-seepage geomembrane prevents the pollutent in bed mud from spreading to the soil of bed mud drying bed surrounding.

The rubble of preferred filling 30 ~ 50mm in described french drain, described french drain cross section is trapezoidal, and upper width is greater than lower width.

The described preferred both sides of leachate collection pipe interlock perforate, and pitch-row is 100mm-150mm, and aperture is 15mm-20mm, are convenient to collect filtrate.

Described mud mattress layer is preferably the gravel bed of particle diameter at 4 ~ 8mm, the thickness 200mm-300mm of described mud mattress layer.

Described mud bed filtering layer is preferably the quartz sand layer of particle diameter between 1 ~ 2mm, and the thickness of described mud bed filtering layer is 250mm-350mm.

Bed mud can be stacked at bed mud to store up layer and carry out nature mummification dehydration, preferably the bed mud after interpolation properties-correcting agent is stored up layer at bed mud and carry out nature mummification dehydration, such process bed mud can not cause secondary pollution, bed mud after process can be used as the base manure in forest land and topdress, nutrient needed for arboreal growth can not only be provided, improve forest production, and can soil be improved, increase soil fertility, accomplish forest land resource.

Described leachate collection pipe can be connected with settling tank, recycles after being convenient to that the filtrate of collection is carried out precipitation process further.

Accompanying drawing explanation

Fig. 1 is the structural representation that the drying bed of sediment is dredged in river course or lake;

Wherein, 1 is enclose low bank between fields, and 2 is anti-seepage geomembranes, and 3 is french drain impervious barriers, and 4 is french drains, and 5 is leachate collection pipes, and 6 is mud mattress layers, and 7 is mud bed filtering layers, and 8 is that bed mud stores up layer, and 9 is settling tanks.

Embodiment

Below in conjunction with embodiment, the utility model is described further.

As shown in Figure 1, the drying bed of sediment is dredged in a kind of river course or lake, described bed mud drying bed surrounding is provided with encloses low bank between fields 1, described low bank between fields 1 inner side-wall that encloses is provided with anti-seepage geomembrane 2, the drying bed that sediment is dredged in described river course or lake is up provided with french drain impervious barrier 3, french drain 4, mud mattress layer 6, mud bed filtering layer 7 and the bed mud for stacking bed mud successively and stores up layer 8 from bottom, be provided with leachate collection pipe 5 in described french drain 4.

Further describe its structure, described bed mud drying bed, surrounding is provided with encloses low bank between fields 1, selects 500 × 400mm knitting bagged soil ramp type to enclose low bank between fields, encloses low bank between fields top width 1000mm, bottom width 2000mm.Enclose the polypropylene anti-seepage geomembrane 2 laying 250g/ ㎡ inside low bank between fields.Described french drain impervious barrier by clay and wilkinite by volume 6:4 mix, be highly 300mm.Filling 30 ~ 50mm rubble in described french drain 4, french drain cross section is trapezoidal, lower wide 1000mm, upper wide 2000mm, height 600mm.Described leachate collection pipe 5, caliber is DN150mm, and become both sides, 60 degree of angles to interlock perforate at the tube hub straight line that lets droop, pitch-row is 100mm, and aperture is 15mm.Described its grain size of gravel of mud mattress layer 64 ~ 8mm, thickness 200mm.Described mud bed filtering layer 7, its quartz sand particle size 1 ~ 2mm, thickness 300mm.

Bed mud can be stacked at bed mud to store up layer 8 and carry out nature mummification dehydration, preferably the bed mud after interpolation properties-correcting agent is stored up layer 8 at bed mud and carry out nature mummification dehydration, then be used as the base manure in forest land and topdress, nutrient needed for arboreal growth can not only be provided, improve forest production, and can soil be improved, increase soil fertility, accomplish forest land resource.

Percolate after filtration enters settling tank 9 after leachate collection pipe 5 is collected, and supernatant liquor after precipitation enters municipal sewage system, and glaur returns stacking drying bed.

Claims (8)

1. the drying bed of sediment is dredged in a river course or lake, it is characterized in that, described bed mud drying bed surrounding is provided with encloses low bank between fields (1), described low bank between fields (1) inner side-wall that encloses is provided with anti-seepage geomembrane (2), described bed mud drying bed is up provided with french drain impervious barrier (3), french drain (4), mud mattress layer (6), mud bed filtering layer (7) and the bed mud for stacking bed mud successively and stores up layer (8) from bottom, be provided with leachate collection pipe (5) in described french drain (4).

2. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, described in enclose low bank between fields (1) for knitting bagged soil ramp type enclose low bank between fields.

3. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, described anti-seepage geomembrane (2) is polypropylene anti-seepage geomembrane.

4. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, the rubble of the interior filling 30 ~ 50mm of described french drain (4), described french drain cross section is trapezoidal, and upper width is greater than lower width.

5. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, described leachate collection pipe (5) both sides interlock perforate, and pitch-row is 100mm-150mm, and aperture is 15mm-20mm.

6. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, described mud mattress layer (6) for particle diameter is at the gravel bed of 4 ~ 8mm, the thickness 200mm-300mm of described mud mattress layer (6).

7. the drying bed of sediment is dredged in river course or lake according to claim 1, it is characterized in that, described mud bed filtering layer (7) is the quartz sand layer of particle diameter between 1 ~ 2mm, and the thickness of described mud bed filtering layer (7) is 250mm-350mm.

8. dredge the drying bed of sediment according to the described river course of one of claim 1-7 or lake, it is characterized in that, described leachate collection pipe (5) is connected with settling tank (9).