CN108558013B

CN108558013B - Desilting system suitable for river course

Info

Publication number: CN108558013B
Application number: CN201711442729.4A
Authority: CN
Inventors: 徐小娜; 孔春雷; 揭亮
Original assignee: Shanghai Taihe Water Technology Development Co ltd
Current assignee: Shanghai Taihe Water Technology Development Co ltd
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2022-10-14
Anticipated expiration: 2037-12-27
Also published as: CN108558013A

Abstract

A desilting system suitable for a river channel comprises at least two weir bodies, wherein a floating filter belt and an ecological floating island are arranged at the downstream of each weir body, the floating filter belt is installed at the lower part of the ecological floating island, aquatic plants are arranged in the ecological floating island, a desilting tank is arranged at the downstream of each filter belt, the bottom of the desilting tank is lower than the bottom surface of a river bed, and an ecological landscape weir is arranged at the downstream of the desilting tank. The floating filter belt can intercept and adsorb suspended matters in river water. The desilting basin is equivalent to a secondary sedimentation basin, and further settles suspended matters in the water body. The ecological landscape weir is the terminal point of the whole desilting system, and the incoming water overflows to the downstream through the upper end of the weir body, so that the final effluent is clear, and meanwhile, the ecological landscape weir has landscape property.

Description

Desilting system suitable for river course

Technical Field

The invention relates to a water treatment technology, in particular to river sediment treatment, and particularly relates to a sediment system suitable for a river.

Background

Under the influence of environmental and artificial over-development factors, the silt content of rivers in China is generally higher. The causes of high sand content in rivers are mainly the following:

1) Vegetation coverage-one of the major determinants;

2) Soil condition-one of the major determinants; the vegetation coverage rate is low, the soil property is loose, and river water scours the river bank, so that the sand content of the river is easily increased;

3) Intensity of rainfall; when the rainfall intensity is high, surface runoff is washed and silt is brought in; .

4) The terrain; the terrain fall is large, the surface runoff scouring kinetic energy is strong, the sand content is high, and the sand content is low when the terrain is gentle.

5) Specific influence factors of the river with low sand content are specifically analyzed by combining with specific situations of distances from the river.

And (3) harming:

the large sand content of the river not only affects the water quality, but also easily silts up the river channel to lift the river bed, thereby easily causing flood disasters.

The daily change of the sand content of water systems such as rivers, ditches and the like in cities is large, and the sand content of river water is obviously increased under the influence of upstream surface runoff or reservoirs in the rainstorm period.

Nowadays, the technology of clearing away sand in river channels mainly uses a silt separation device arranged in the river channel as a main part, is mainly suitable for wide river channels, has the problems of higher initial investment cost, high equipment installation difficulty, high equipment maintenance cost, outward transportation of garbage and settled sand and the like, and is not suitable for small river channels such as rivers, ditches and the like in cities.

Disclosure of Invention

The invention aims to provide a sand settling system suitable for a river channel, and aims to solve the technical problems of high cost and high treatment difficulty in treating river channel sediment in the prior art.

The invention provides a sand settling system suitable for a river channel,

including two at least weirs, the weir set up in the riverbed, the low reaches of weir be provided with and float filter band and ecological chinampa, the showy filter band install in the lower part of ecological chinampa, the showy filter band fix in the riverbed, ecological chinampa in be provided with aquatic plant, the low reaches of showy filter band be provided with the desilting pond, the bottom of desilting pond be less than the bottom surface of riverbed, the low reaches of desilting pond are provided with the ecological landscape weir, the ecological landscape weir fix in the riverbed.

Further, the weir body is any one of a sand bag weir, a soil weir, a rubber weir, a concrete weir or a wood pile weir; the height of any weir is 10 to 50cm, and the interval between two adjacent weirs is more than 20 m.

Further, in the upstream to downstream direction of the channel, the height of the subsequent weir is higher than the height of the previous weir.

Further, the length of the floating filter belt is more than 20 m.

Further, the floating filter belts are any one of biological streamer belts, artificial aquatic weeds, akebia stems or biological ropes, and the interval between any two adjacent filter belts is 10-50cm.

Specifically, the biological ribbon, the akkern and the biological rope are biological fillers, belong to the prior art and are not described again. The microorganism generally has negative charges, and the surface of the filler is crosslinked with a layer of electropositive material, so that the surface of the streamer is in positive polarity, bacteria are easy to attach and grow, and the membrane hanging is quick. The attached microorganisms grow by taking organic matters in the water as nutrients, so that the aims of consuming harmful substances and purifying the water quality are fulfilled.

Further, the gradient of the desilting pool is 1 to 3 to 1, the excavation depth is 1.0 to 3.0m, and the length of the desilting pool is 10m to 100m.

Furthermore, the ecological landscape weir is of a frame structure, filler is arranged in the frame structure, the filler is sandbags, gravels or ceramsite, a wrapping layer is arranged on the outer side of the frame structure, and non-woven fabrics or steel wire meshes are arranged on the outer side of the wrapping layer; and the filling material is provided with scouring-resistant aquatic plants.

Specifically, the ecological floating island is a floating device, and aquatic plants are planted in the floating device, which is not described herein again.

The principle of the invention is as follows: the multistage cascaded weir body can slow down the river course bottom velocity of flow, helps great suspended solids such as silt, particulate matter in the water to subside, tentatively subsides the particulate matter that the upper reaches came into water. The floating filter belt is provided with an ecological floating island and biological ribbons, and by utilizing developed roots of aquatic vegetation in the ecological floating island and biological membranes of the biological ribbons, on one hand, suspended matters in river water can be intercepted and adsorbed, on the other hand, pollutants in a water body can be converted and degraded, and a certain purification effect on the river water is achieved. The desilting basin is equivalent to a secondary sedimentation basin, and further settles suspended matters in the water body. The ecological landscape weir is the terminal point of the whole desilting system, and the incoming water overflows to the downstream through the upper end of the weir body, so that the final effluent is clear, and meanwhile, the ecological landscape weir has landscape property.

Compared with the prior art, the invention has the advantages of positive and obvious technical effect. The system is more suitable for sediment sedimentation of small and medium river channels, can realize clear water outlet of the landscape weir, and has a certain water quality purification function. The system is simple and easy to build, simple in later maintenance and free of energy consumption, and only the deposit of the river channel at the section needs to be cleaned regularly, so that the river channel cleaning cost and workload are greatly reduced.

Drawings

Fig. 1 is a plan view of a sand settling system for a river according to the present invention.

Detailed Description

Example 1

As shown in fig. 1, the invention provides a sand settling system suitable for a river channel, which comprises at least two weirs 21 and 22, wherein the weirs 21 and 22 are arranged in a river bed 1, a floating filter belt 3 is arranged at the downstream of the weirs 21 and 22, the floating filter belt 3 is fixed in the river bed 1, an ecological floating island 4 is arranged at the upper part of the filter belt 3, aquatic plants 5 are arranged in the ecological floating island 4, a sand settling tank 6 is arranged at the downstream of the filter belt 3, the bottom of the sand settling tank 6 is lower than the bottom surface of the river bed 1, an ecological landscape weir 7 is arranged at the downstream of the sand settling tank 6, and the ecological landscape weir 7 is fixed in the river bed 1.

Further, the weir bodies 21 and 22 are any one of a sand bag weir, a soil weir, a rubber weir, a concrete weir or a wood pile weir; the height of any one weir body 21 and 22 is 10 to 50cm, and the interval between two adjacent weir bodies 1 is more than 20 m.

Further, in the upstream to downstream direction of the channel, the height of the subsequent weir 22 is higher than the height of the previous weir 21.

Further, the length of the floating filter belt 3 is more than 20 m.

Further, the floating filter belt 3 is a biological streamer, an artificial float grass, an Akebia or a biological rope. The interval between any two adjacent filter belts 3 is 10 to 50cm.

Specifically, the biological streamer, the Akebia and the biological rope are biological filling materials, microorganisms generally have negative charges, and a layer of electropositive material is crosslinked on the surface of the filling materials, so that the surface of the streamer is in positive polarity, bacteria are easy to attach and grow, and the membrane is fast to hang. The attached microorganisms grow by taking organic matters in the water as nutrients, so that the aims of consuming harmful substances and purifying the water quality are fulfilled.

Further, the gradient of the desilting pool 6 is 1 to 3 to 1, the excavation depth is 1.0 to 3.0m, and the length of the desilting pool is 10m to 100m.

Further, the ecological landscape weir 7 is of a frame structure, filler is arranged in the frame structure, the filler is sandbags, gravels or ceramsite, a wrapping layer is arranged on the outer side of the frame structure, and non-woven fabrics or steel wire meshes are arranged on the outer side of the wrapping layer; and the filling material is provided with a scouring-resistant aquatic plant 8.

Claims

1. The utility model provides a sediment system suitable for river course which characterized in that: the ecological floating island is characterized by comprising at least two weirs, wherein the weirs are arranged in a river bed, a floating filter belt and an ecological floating island are arranged at the downstream of each weir, the floating filter belt is arranged at the lower part of the ecological floating island, the floating filter belt is fixed in the river bed, aquatic plants are arranged in the ecological floating island, a desilting basin is arranged at the downstream of the floating filter belt, the bottom of the desilting basin is lower than the bottom surface of the river bed, an ecological landscape weir is arranged at the downstream of the desilting basin, the ecological landscape weir is fixed in the river bed, the height of the weir at the back is higher than that of the weir at the front in the upstream-downstream direction of the river channel, the ecological landscape weir is of a frame structure, a filler is arranged in the frame structure, the filler is a sand bag, gravel or ceramsite, a wrapping layer is arranged at the outer side of the frame structure, and a non-woven fabric or a steel wire mesh is arranged at the outer side of the wrapping layer; and the filling material is provided with scouring-resistant aquatic plants.

2. The system of claim 1, wherein the system comprises: the weir body is any one of a sand bag weir, a soil weir, a rubber weir, a concrete weir or a wood pile weir; the height of any weir is 10 to 50cm, and the interval between two adjacent weirs is more than 20 m.

3. The sand sediment system suitable for the river channel according to claim 1, wherein: the length of the floating filter belt is more than 20 m.

4. The system of claim 1, wherein the system comprises: the floating filter belt is any one of a biological streamer, artificial float grass, akebia stems or biological ropes, and the interval between any two adjacent filter belts is 10 to 50cm.

5. The sand sediment system suitable for the river channel according to claim 1, wherein: the gradient of the sand basin is 1 to 1, the excavation depth is 1.0 to 3.0m, and the length of the sand basin is 10m to 100m.