Water body purification system based on ecological gravel bed

Abstract

The water purification system based on the ecological gravel bed comprises an ecological gravel bed assembly, the water inlet end of the ecological gravel bed assembly is connected with a water diversion assembly, the water outlet end of the ecological gravel bed assembly is connected with an outlet water conveying assembly, and an aeration treatment area, a gravel adsorption area and a plant adsorption area are sequentially arranged in the ecological gravel bed assembly from the water inlet end to the water outlet end. The aeration treatment area, the gravel adsorption area and the plant adsorption area are in transition through buffer water passing assemblies, an aeration device is arranged in the aeration treatment area, artificial modified gravels are laid in the gravel adsorption area, and aquatic adsorption plants are planted in the plant treatment area; by arranging the aeration treatment area, the gravel adsorption area and the plant adsorption area, multi-layer treatment of a polluted water body can be realized, so that deep purification of a natural water body is realized, effluent meets the requirements of Water Quality Standard for Landscape Recreational Water, and the system is simple and reasonable in structure, does not need high-cost investment, is simple in later operation and maintenance, and is suitable for popularization and application. The method is suitable for popularization and use in treatment and restoration of various natural water bodies.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a water purification system based on an ecological gravel bed. Background Art

[0003] The concentrations of major indicators such as organic matter, nitrogen, and phosphorus in natural water bodies are slightly lower than those in domestic sewage, requiring treatment facilities to have a higher treatment rate. In addition, due to the current status and total amount of water bodies, and the need for natural water bodies to meet the landscape needs of the people, higher requirements are placed on treatment technology, landscape functions, construction period investment, and later operation and maintenance.

[0004] At present, the natural water restoration technologies used in China mainly include sewage interception, sediment dredging, aeration and oxygenation, chemical dosing, water dilution, flow state change, aquatic plant and animal ecological restoration, etc. However, these traditional methods still have the problems of low efficiency in removing COD, ammonia nitrogen, phosphorus, and heavy metals in the restoration and treatment of black and odorous water bodies, little improvement in dissolved oxygen, redox potential, transparency and odor indicators in water bodies, large engineering workload, high energy consumption, high cost, and possible secondary pollution.

[0005] Therefore, there is an urgent need for a water purification system based on an ecological gravel bed that can treat natural water bodies, landscape water bodies, and black and smelly water bodies, and has stable operation, high treatment efficiency, and compliant effluent quality and low construction cost, thereby solving the problems of poor effluent quality and cumbersome maintenance of traditional purification technologies. Summary of the invention

[0006] The purpose of the present invention is to provide a water purification system based on an ecological gravel bed to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a water purification system based on an ecological gravel bed, comprising an ecological gravel bed component, wherein the water inlet end of the ecological gravel bed component is connected to a water diversion component, and the water outlet end thereof is connected to a water outlet conveying component, and an aeration treatment area, a gravel adsorption area and a plant adsorption area are sequentially arranged in the ecological gravel bed component from the water inlet end to the water outlet end, and the aeration treatment area, the gravel adsorption area and the plant adsorption area are transitioned through a buffer water flow component, an aeration device is arranged in the aeration treatment area, artificially modified gravel is laid in the gravel adsorption area, and aquatic adsorption plants are planted in the plant treatment area.

[0009] Preferably, a water retaining wall is provided on the outside of the ecological gravel bed assembly, and a waterproof layer is laid on the inner side of the water retaining wall and the inner side of the bottom.

[0010] Preferably, the bottoms of the aeration treatment zone, the gravel adsorption zone and the plant adsorption zone are all inclined, the bottom slope of the aeration treatment zone is 5%, the bottom slope of the gravel adsorption zone is 2.5%, and the bottom slope of the plant adsorption zone is 1.25%.

[0011] Preferably, the aeration device comprises an annular aeration pipe, aeration branch pipes are distributed on the side of the annular aeration pipe, and the spacing between the aeration branch pipes is 200 mm, and the annular aeration pipe is connected to the blower room.

[0012] Preferably, the porosity of the artificially modified gravel is 30-50% and the particle size is 8-20 cm.

[0013] Preferably, a planting trough is provided in the plant treatment area, and a mixture of artificial gravel, artificial pebbles, artificial expanded clay, artificial zeolite, artificial pyrite and artificial fly ash is paved in the planting trough, and the aquatic adsorption plants are planted in the mixture, and the aquatic adsorption plants include reed units, cattails and loosestrife.

[0014] Preferably, the buffer water flow component comprises a buffer platform, a water flow splash wall is arranged inside the buffer platform, and a filter net is arranged on the water flow splash wall.

[0015] Preferably, the water diversion assembly comprises a water intake pump house, a water inlet well and a water distribution channel which are connected in sequence; the water intake pump house is arranged at the sewage end and is provided with a filter grid; and the water distribution channel is provided with a mud discharge device.

[0016] Preferably, the mud discharge device adopts a gravity mud discharge device and / or a power mud discharge device.

[0017] Preferably, the water delivery system comprises a water collection channel and a water collection well connected in sequence.

[0018] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0019] The present invention provides a water purification system based on an ecological gravel bed, comprising an ecological gravel bed component, wherein the water inlet end of the ecological gravel bed component is connected to a water diversion component, and the water outlet end thereof is connected to a water outlet conveying component, and an aeration treatment area, a gravel adsorption area and a plant adsorption area are sequentially arranged from the water inlet end to the water outlet end in the ecological gravel bed component, and the aeration treatment area, the gravel adsorption area and the plant adsorption area are transitioned through a buffer water flow component, an aeration device is arranged in the aeration treatment area, artificially modified gravel is laid in the gravel adsorption area, and aquatic adsorption plants are planted in the plant treatment area; by setting the aeration treatment area, the gravel adsorption area and the plant adsorption area, multi-level treatment of polluted water can be achieved, thereby realizing deep purification of natural water bodies, and the outlet water meets the requirements of the "Water Quality Standards for Landscape and Recreational Water", and the system structure is simple and reasonable, does not require high cost investment, and is simple to operate and maintain in the later stage, and is suitable for promotion and use in the management and restoration of various natural water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic structural diagram of a water purification system based on an ecological gravel bed provided by the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a water purification system based on an ecological gravel bed to solve the problems existing in the prior art.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] This embodiment provides a water purification system based on an ecological gravel bed, such as Figure 1As shown, it includes an ecological gravel bed component 1, the water inlet end of the ecological gravel bed component 1 is connected to a water diversion component 2, and the water outlet end is connected to a water outlet conveying component 3. The ecological gravel bed component 1 is provided with an aeration treatment area 11, a gravel adsorption area 12 and a plant adsorption area 13 from the water inlet end to the water outlet end, and the aeration treatment area 11, the gravel adsorption area 12 and the plant adsorption area 13 are transitioned by a buffer water flow component 4. An aeration device is provided in the aeration treatment area, artificial modified gravel is laid in the gravel adsorption area, and aquatic adsorption plants are planted in the plant treatment area.

[0027] As an implementation mode, the bed size of the ecological gravel bed assembly 1 is 6.058m×2.438m, the gravel bed is 2.591m deep at the water inlet and 2.391m deep at the water outlet. A retaining wall is provided on the outside. The retaining wall and the bottom plate are both reinforced concrete structures and are paved with a waterproof layer to avoid leakage of polluted water bodies.

[0028] As an implementation mode, the bottoms of the aeration treatment area 11, the gravel adsorption area 12 and the plant adsorption area 13 are all inclined, the bottom slope of the aeration treatment area 11 is 5%, the bottom slope of the gravel adsorption area 12 is 2.5%, and the bottom slope of the plant adsorption area 13 is 1.25%, thereby achieving a slow self-flow effect.

[0029] As an implementation mode, the aeration device comprises an annular aeration pipe, aeration branches are distributed on the side of the annular aeration pipe, and the spacing between the aeration branches is 200 mm, and the annular aeration pipe is connected to the blower room.

[0030] In order to reduce the impact of blower noise, the machine room is set up underground, with four 400-degree vents on the top, a 2.5m×2.5m entrance and exit on the top, and the rest of the room is covered with 20cm of planting soil for greening. The blower is a high-efficiency, low-energy and low-noise blower with a blast volume of 20m 3 / min, one is in use and the other is in reserve. To further reduce noise, a muffler is installed at the blower intake pipe.

[0031] Microporous aeration is adopted for aeration. The aeration pipe is made of seamless steel pipe. The inner and outer walls are anti-corrosive with aluminum alloy spray coating, 150μm thick, with a 45° opening at the bottom and a 3mm aperture. They are arranged in two rows with an interval of 100mm. The annular aeration pipe (DN100) is arranged in a ring, and the aeration branch pipe (DN50) is arranged in the middle with an interval of 200mm. To ensure uniform air distribution, the axis of the annular aeration pipe and the aeration branch pipe should be kept horizontal. The bracket is made by pipe clamps, channel steels and expansion bolts to fix the aeration pipe to ensure the level of the aeration pipe.

[0032] As an implementation mode, the porosity of the artificially modified gravel is 30-50%, and the particle size is 8-20 cm, and specifically, the gradations may be 18-20 cm, 12-15 cm, and 8-10 cm.

[0033] As an implementation mode, a planting trough is provided in the plant treatment area 13, and a mixture of artificial gravel, artificial pebbles, artificial expanded clay, artificial zeolite, artificial pyrite and artificial fly ash is paved in the planting trough. The aquatic adsorption plants are planted in the mixture. The aquatic adsorption plants include reed units, cattails and loosestrife, which can effectively remove nitrogen and phosphorus.

[0034] As an implementation manner, the buffer water flow component 4 includes a buffer platform 41, a water flow wall 42 is arranged inside the buffer platform 41, and a filter net 43 is arranged on the water flow wall 42 to play a role in filtering and slowing down the flow.

[0035] As an embodiment, the water diversion assembly 2 includes a water intake pump room 21, a water inlet well 22 and a water distribution channel 23 which are connected in sequence. The water intake pump room 21 is arranged at the sewage end, and the water distribution channel 23 is provided with a mud discharge device.

[0036] Two filtering grids are set at the water intake to prevent blockage caused by garbage and large suspended solids. The collected domestic sewage is pumped into the water inlet well by the water intake pump room. The water inlet well is arc-shaped, which can effectively alleviate the impact load of water. At the same time, the structure of the water inlet well is strengthened and designed with C30 anti-seepage reinforced concrete with a wall thickness of 400mm. It enters the water distribution channel through the water inlet well, and the sludge is discharged by gravity or power discharge of the water distribution channel. Finally, the sewage after sludge discharge enters the ecological gravel bed assembly through the water distribution channel.

[0037] As an implementation mode, the water delivery system 3 includes a water collection channel 31 and a water collection well 32 which are connected in sequence.

[0038] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A water purification system based on an ecological gravel bed, characterized in that: It comprises an ecological gravel bed component, the water inlet end of the ecological gravel bed component is connected to a water diversion component, the water outlet end of the ecological gravel bed component is connected to a water outlet conveying component, an aeration treatment area, a gravel adsorption area and a plant adsorption area are sequentially arranged from the water inlet end to the water outlet end in the ecological gravel bed component, the aeration treatment area, the gravel adsorption area and the plant adsorption area are transitioned by a buffer water flow component, an aeration device is arranged in the aeration treatment area, artificial modified gravel is laid in the gravel adsorption area, and aquatic adsorption plants are planted in the plant treatment area.

2. The water purification system based on the ecological gravel bed according to claim 1 is characterized by: A water retaining wall is arranged outside the ecological gravel bed assembly, and a waterproof layer is laid on the inner side of the water retaining wall and the inner side of the bottom.

3. The water purification system based on the ecological gravel bed according to claim 1 is characterized in that: The bottoms of the aeration treatment area, the gravel adsorption area and the plant adsorption area are all inclined, with the bottom slope of the aeration treatment area being 5%, the bottom slope of the gravel adsorption area being 2.5%, and the bottom slope of the plant adsorption area being 1.25%.

4. The water purification system based on the ecological gravel bed according to claim 1 is characterized in that: The aeration device comprises an annular aeration pipe, aeration branch pipes are distributed on the side of the annular aeration pipe, and the spacing between the aeration branch pipes is 200 mm. The annular aeration pipe is connected to the blower room.

5. The water purification system based on the ecological gravel bed according to claim 1 is characterized in that: The porosity of the artificially modified gravel is 30-50%, and the particle size is 8-20 cm.

6. The water purification system based on the ecological gravel bed according to claim 1, characterized in that: A planting trough is provided in the plant treatment area, and a mixture of artificial gravel, artificial pebbles, artificial expanded clay, artificial zeolite, artificial pyrite and artificial fly ash is paved in the planting trough. The aquatic adsorption plants are planted in the mixture, and the aquatic adsorption plants include reed units, cattails and loosestrife.

7. The water purification system based on the ecological gravel bed according to claim 1, characterized in that: The buffer water flow component comprises a buffer platform, a water flow splash wall is arranged in the buffer platform, and a filter net is arranged on the water flow splash wall.

8. The water purification system based on the ecological gravel bed according to claim 1 is characterized by: The water diversion assembly comprises a water intake pump house, a water inlet well and a water distribution channel which are connected in sequence. The water intake pump house is arranged at the sewage end and is provided with a filter grid, and the water distribution channel is provided with a mud discharge device.

9. The water purification system based on the ecological gravel bed according to claim 8 is characterized by: The mud discharge device adopts a gravity mud discharge device and / or a power mud discharge device.

10. The water purification system based on ecological gravel bed according to claim 1, characterized in that: The water delivery system comprises a water collection channel and a water collection well which are connected in sequence.

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