Sedimentation tank for riverway purification water taking

Abstract

The invention relates to the technical field of rainfall flood runoff water taking, in particular to a sedimentation tank for riverway purification water taking. Comprising a sedimentation tank and a vertical wall, a filtering space is arranged at the water inlet of the sedimentation tank, small holes for filtering impurities in water are formed in the filtering space, a vertical wall is arranged on the right side of the sedimentation tank and divides the sedimentation tank into a left sedimentation space and a right sedimentation space, and the filtering space is arranged above the left sedimentation space; the device realizes multi-stage filtration and precipitation of rainfall flood runoff, improves the water quality purification effect, has the characteristics of self-adaptive water volume adjustment capability and adaptation to riverway water volume fluctuation, and ensures stable operation of a purification water taking system.

Description

Technical Field

[0001] This invention relates to the field of stormwater runoff water intake technology, and in particular to a sedimentation tank for river purification water intake. Background Technology

[0002] Climate change, represented by global warming and frequent extreme weather events, has a profound impact on the survival and development of all mankind and is a major challenge faced by all countries. In particular, some countries located in arid and semi-arid regions need to take a proactive approach to the risks and challenges brought about by a series of major natural disasters from the perspective of harmonious coexistence between man and nature. Seasonal rivers are those whose flow is significantly affected by the seasons throughout the year. The seasonal variation of rivers varies depending on the type of river and its water source. Rivers primarily fed by rainwater mainly change with the rainfall season, with more rain in summer and autumn and less or even drying up in winter. For rivers primarily fed by snowmelt and glacial meltwater, the rational utilization of seasonal rainwater becomes particularly important. Existing sedimentation tanks used for river intake generally suffer from problems such as simple structural design, insufficient filtration layers, and poor water volume regulation capacity. They cannot adapt to the fluctuating characteristics of sudden increases in river runoff. Under large water volume conditions, they are prone to insufficient filtration and low sedimentation efficiency, resulting in high effluent sediment and impurities, which are difficult to meet the water quality requirements for daily use. At the same time, existing sedimentation tanks lack adaptive water volume regulation structures, which can easily cause overflows under large water volume conditions, affecting the stable operation of the overall water purification system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sedimentation tank for river purification water intake, which realizes multi-stage filtration and sedimentation of rainwater runoff, improves water purification effect, and has the ability to adapt to the fluctuation characteristics of river water volume, so as to ensure the stable operation of the purification water intake system.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a sedimentation tank for river purification water intake, comprising: a sedimentation tank and a vertical wall; the water inlet of the sedimentation tank is provided with a filtration space, the filtration space is provided with small holes for filtering impurities in the water, the right side of the sedimentation tank is provided with a vertical wall, the vertical wall divides the sedimentation tank into left and right sedimentation spaces, and the filtration space is arranged above the left sedimentation space.

[0005] Preferably, a filter layer for purifying water source is provided above the filter space.

[0006] Preferably, the filter layer consists of a pebble layer, a fine sand layer, a coarse sand layer, and a stone layer from bottom to top.

[0007] Preferably, two sets of overflow channels are symmetrically arranged on both sides of the filtration space.

[0008] Preferably, the height of one group of overflow channels is less than the height of the other group.

[0009] Compared with the prior art, the present invention has the following advantages: This sedimentation tank, through its structural design of pre-filtration and dual sedimentation spaces separated by vertical walls, achieves integrated water purification of preliminary filtration, deep filtration, and multi-stage sedimentation, significantly reducing the content of silt and impurities in stormwater runoff, and ensuring that the effluent quality meets the requirements for daily production and domestic water use. Two overflow channels of different heights are set on both sides of the filtration space, which can automatically adjust according to the amount of water in the river. When the water volume is small, the water is filtered and settled throughout the entire process. When the water volume is large, the overflow water is diverted through the overflow channels to avoid the filtration space from overloading. This adapts to the characteristics of sudden surges in rainwater runoff and ensures the stable operation of the sedimentation tank. 3. The overall structural design is simple and reasonable, and the construction difficulty is low. It can be directly and seamlessly connected with the energy dissipation pool and water storage pool of the river purification water intake system. It has strong adaptability and is easy to promote and apply in the purification water intake project of seasonal rivers, providing a stable clean water source for the dry season. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a sedimentation tank used for river purification and water intake. Figure 2 This is a partial structural diagram of a sedimentation tank used for river purification and water intake. Figure 3 This is a schematic diagram of the energy dissipation tank structure of a sedimentation tank for river purification and water intake. Figure 4 This is a schematic diagram of the sedimentation tank structure for a river purification water intake. Figure 5 This is a schematic diagram of the filter layer structure of a sedimentation tank used for river purification and water intake; Figure 6 A schematic diagram of the cross-section of the lifting platform of a sedimentation tank for river purification and water intake; Figure 7 This is a full sectional view of the obstruction of a sedimentation tank used for river purification and water intake.

[0011] In the diagram: 1. Dam body; 2. Diversion section; 3. Energy dissipation pool; 4. Sedimentation pool; 5. Water storage pool; 6. Connecting channel; 201. Trash rack; 301. Flow platform; 302. Barrier wall; 303. Overflow hole; 401. Filtration space; 402. Vertical wall; 403. Filtration layer; 404. Pebble layer; 405. Fine sand layer; 406. Coarse sand layer; 407. Stone layer; 408. Overflow channel; 501. Obstruction; 502. Insulation layer. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0013] Specific implementation method one: Combining Figure 1-7 As shown, a river purification water intake system based on a three-dimensional debris barrier includes: a dam body 1, which is located in the river. A vertically arranged diversion section 2 is located on one side of the dam body 1 upstream, and a dissipation pool 3, a sedimentation pool 4, and a storage pool 5 are sequentially arranged downstream; a connecting channel 6, which runs through the dam body 1 and connects to the diversion section 2 and the dissipation pool 3 at both ends. During heavy rain, runoff from the basin will continuously accumulate in the river channel. Due to the effect of the dam body 1, the water level in front of the dam will continuously rise, and a large amount of rainwater runoff will enter the diversion section 2, then reach the dissipation pool 3 through the connecting channel 6. The runoff, after its water energy is reduced, enters the sedimentation pool 4 along the water conveyance channel. The runoff, with its sediment content significantly reduced, then enters the storage pool 5 for later use through the water conveyance channel. This system coordinates flood control and drought relief, achieving a synergistic solution to drought and flood problems, and features stability, intensive use, high efficiency, greenness, low carbon emissions, and environmental protection. The connecting channel 6 can be a culvert structure.

[0014] Combination Figure 1 and Figure 2 As shown, a trash rack 201 is provided above the water-facing side of the guide section 2. The guide section 2 has a hollow structure and is connected to the connecting channel 6. After the water level in the river rises to the trash rack, it is filtered by the trash rack 201 and enters the hollow guide section 2. It is then guided to the energy dissipation pool 3 by the connecting channel 6 to achieve the functions of diversion and water volume regulation. In a preferred embodiment, the horizontal cross-sectional shape of the guide section 2 is a hollow quadrangular prism, which facilitates its construction on bedrock in the river channel.

[0015] Combination Figure 3 and Figure 6 As shown, the inlet of the energy dissipation tank 3 is equipped with a jetting platform 301 and a baffle wall 302 in the middle. The baffle wall 302 is equipped with multiple overflow holes 303. The water flow is jetted into the energy dissipation tank 3 through the jetting platform 301, and vortexes, impacts, mixing, turbulence, diffusion and shearing occur in the tailwater depth to eliminate energy and ensure subsequent sedimentation treatment. In addition, stones can be laid at the bottom of the energy dissipation pool 3 to form a pit bottom, and the energy can be further dissipated by scouring with the bottom stones.

[0016] Combination Figure 4 and Figure 5As shown, the sedimentation tank 4 has a filtration space 401 at the inlet and a vertical wall 402 on the right side. The water flows steadily into the filtration space 401 after energy dissipation. The small holes on the filtration space 401 initially filter the impurities in the water, and then the water falls to the bottom of the sedimentation tank 401 to settle the sediment again. The vertical wall 402 divides the sedimentation tank 4 into left and right spaces. The settled water overflows to the right side to settle again, completing multiple cleaning treatments to ensure water quality. In a preferred embodiment, a filter layer 403 for water purification is provided above the filtration space 401. The filter layer 403 includes a pebble layer 404, a fine sand layer 405, a coarse sand layer 406, and a stone layer 407 arranged sequentially from bottom to top. Water flows through the pebble layer 404, the fine sand layer 405, the coarse sand layer 406, and the stone layer 407 in sequence, which further improves the purification effect and reduces the workload of the subsequent sedimentation area. In a preferred embodiment, two sets of overflow channels 408 are symmetrically arranged on both sides of the filtration space 401. When the water flow rate is large and the treatment efficiency of the filtration space cannot meet the current demand, the overflowing water can be regulated by the overflow channels 408. The overflow channels 408 can be connected to the outside of the sedimentation tank 4 to discharge excess water, or they can be designed to be connected to the inside of the sedimentation tank 4 to meet the treatment water volume requirements by shortening the sedimentation time. In a preferred embodiment, the height of one set of overflow channels 408 is less than the height of the other set, and the adjustment is automatically completed according to the water volume.

[0017] Combination Figure 7 As shown, multiple sunshades 501 float in the water storage tank 5 to block sunlight. By blocking sunlight from directly hitting the water surface, the sunshades 501 achieve a certain blocking effect, reduce water evaporation, and thus improve the water utilization efficiency in the water storage tank 5. In a preferred embodiment, the shield 501 is hollow and made of plastic. The cross-sectional shape of the shield 501 is a hexagonal prism. The shield 501 has an internal heat insulation layer 502. The hollow design of the plastic material meets the requirement of the shield 501 floating. At the same time, the hexagonal prism shape increases the shielding area and facilitates the casting process, reducing waste. The internal heat insulation layer 502 further reduces the impact of heat on the water surface. The heat insulation layer 502 can be made of lightweight polystyrene board or filled with foam plastic.

[0018] Specific construction example 1 The drainage area is 100 square kilometers, the drainage length is 50 kilometers, the downstream river channel has an average width of 100 meters, a dam body 1 is built at a point where the river channel is 70 meters wide, a diversion section 2 is built 50 meters upstream of the dam in the middle of the river channel, and a connecting channel 6 is built across the dam body 1 at an incline. An energy dissipation pool, a sedimentation pool and a water storage pool are built on one bank of the river channel downstream of the dam body. The dam body has a trapezoidal cross section, with a bottom width of 50 meters, a top width of 6 meters, and a height of 20 meters. It spans both sides of the river channel, with the top level with the riverbank and the bottom resting on the bedrock layer of the riverbed. A 6-meter-wide spillway is built in the middle of the dam top. A diversion section is constructed 50 meters upstream of the dam body 1, in the middle of the river channel. The diversion section is a quadrangular prism, 15 meters high, with a cross-section of 6 meters x 6 meters. A trash rack is constructed on the upstream side, 5 meters wide and 13 meters high, with 0.5 meters left on each side and 1.0 meter left at the top and bottom. An inlet and outlet are constructed on the downstream side, 2 meters high and 3 meters wide, for the installation and maintenance of water purification and intake facilities. The cross-section of the connecting channel 6 is circular with a diameter of 3 meters. It is connected to the flow guide 2 upstream and the energy dissipation pool 3 downstream. The energy dissipation tank 3 is a cuboid with a length, width and depth of 10 meters x 5 meters x 5 meters, one end of which is connected to the connecting channel 6 and the outlet end is connected to the sedimentation tank 4. The sedimentation tank 4 is a cuboid with a length, width and depth of 10m x 5m x 5m, one end of which is connected to the energy dissipation tank 3 and the outlet end is connected to the water storage tank 5. The reservoir 5 is a cuboid with a length, width, and depth of 100 meters x 100 meters x 20 meters. One end is connected to the sedimentation tank 4, and the downstream end is connected to the water supply unit. Based on a daily water consumption of 50 liters per person, it can provide water for 10,000 people for one year, greatly solving the water problem for people during the dry season.

[0019] A construction method for a river purification water intake system using a three-dimensional trash rack is characterized by comprising: S1. Select a narrow section of the river channel, clear away the alluvial deposits, pour the bottom of dam body 1 onto the bedrock, and level the top of dam body 1 with the riverbank. The spillway is located in the middle of the top of the dam body. S2. Select a certain distance upstream of dam body 1, clear the alluvial deposits in the river channel, and construct a quadrangular prism-shaped diversion section. Contain a debris barrier 201 on the water-facing side of diversion section 2, and construct an inlet and outlet on the water-repellent side of diversion section 6. S3, connecting channel 6 obliquely crosses the dam body 1, upstream connected to the diversion section 2 located in the middle of the river channel, and downstream connected to the energy dissipation pool 3 located on one bank of the river channel. S4. A water conveyance channel is built on the sedimentation tank 4, which is connected to the upstream energy dissipation tank 3, and downstream to the water storage tank 5.

[0020] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A sedimentation tank for river purification water intake, characterized in that, include: Sedimentation tank (4) and vertical wall (402); the inlet of sedimentation tank (4) is provided with a filtration space (401), the filtration space (401) is provided with small holes for filtering impurities in the water, the right side of sedimentation tank (4) is fixed with a vertical wall (402), the vertical wall (402) divides sedimentation tank (4) into left and right sedimentation spaces, and the filtration space (401) is arranged above the left sedimentation space.

2. A sedimentation tank for river purification water intake according to claim 1, characterized in that: A filter layer (403) for purifying water is provided above the filter space (401).

3. A sedimentation tank for river purification water intake according to claim 2, characterized in that: The filter layer (403) consists of a pebble layer (404), a fine sand layer (405), a coarse sand layer (406), and a stone layer (407) from bottom to top.

4. A sedimentation tank for river purification water intake according to claim 1, characterized in that: Two overflow channels (408) are symmetrically arranged on both sides of the filter space (401).

5. A sedimentation tank for river purification water intake according to claim 4, characterized in that: The height of one set of overflow channels (408) is less than the height of the other set.

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