Tail water purification system of water quality purification plant

Abstract

A tail water purification system of a water quality purification plant comprises a front buffer area arranged at a sewage discharge port, the front buffer area comprises a water diversion ditch, a standing area and a stepped purification area, and the water diversion ditch is communicated with the sewage discharge port and used for directly receiving sewage discharged from the sewage discharge port; the standing area comprises a plurality of standing pools, each standing pool is communicated with the water diversion ditch, each standing pool is provided with a blocking door, and the blocking doors can isolate the water diversion ditch from the standing pools; the step purification area at least comprises a first step and a second step which are communicated, the first step is used for planting purification plants, and the second step is used for planting another purification plant. According to the invention, sewage at the sewage discharge port can be subjected to pre-precipitation treatment and then discharged into a subsequent ecological system.

Description

Technical Field

[0001] The utility model belongs to the technical field of ecological management, and in particular relates to a tail water purification system of a water purification plant. Background Art

[0002] In recent years, large amounts of solid waste and polluted water have flowed into lakes due to improper treatment, causing deterioration in lake water quality and a decline in the water's self-purification capacity, severely impacting urban landscapes and surrounding lake ecosystems. Especially during rainfall, the lack of pre-treatment facilities at lake entrances allows various polluted water bodies and solid waste to flow into the lakes with rainwater, causing a massive accumulation of nitrogen, phosphorus, organic matter, and various nutrients in the lake waters, leading to imbalances and even collapse of the lake ecosystem.

[0003] Artificial wetlands are artificially constructed and controlled structures or facilities similar to natural swamp wetlands. The basic principle of their sewage treatment is to evenly distribute sewage to the artificially constructed wetlands. In the process of sewage flowing in a certain direction, the technology mainly utilizes the physical, chemical and biological synergistic effects of soil, artificial media, plants and microorganisms to purify the sewage.

[0004] If sewage is discharged directly into artificial wetlands, it is easy to cause the sewage concentration near the outlet to be too high, and the sewage discharge volume will be greater than the purification capacity of the area, making it difficult to maintain the normal ecology of the artificial wetland at the sewage outlet. Utility Model Content

[0005] The utility model provides a tail water purification system of a water purification plant, which solves the technical problem of excessive sewage concentration at a sewage outlet.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A tailwater purification system for a water purification plant includes a pre-buffer zone arranged at a sewage outlet, the pre-buffer zone including:

[0008] a diversion ditch, the diversion ditch being connected to the sewage outlet and being used to directly receive sewage discharged from the sewage outlet;

[0009] A static area, comprising a plurality of static pools, each of which is connected to the diversion ditch, and each of which is provided with a blocking door capable of isolating the diversion ditch from the static pool;

[0010] The stepped purification area comprises at least a first step and a second step that are connected, wherein the first step is used for growing purification plants, and the second step is used for growing another type of purification plant.

[0011] Furthermore, a plurality of water outlet holes are provided on the side of the static pool opposite to the blocking door, and the water outlet holes are arranged above 1 / 2 of the height of the static pool.

[0012] Furthermore, the first step and the second step both include a slope section and a flat slope section, the flat slope section is located at the bottom of the slope section, and a plurality of planting points are provided on the slope section, and the flat slope section is provided with a planting groove.

[0013] Furthermore, the planting groove and each planting point are provided with a planting frame, the planting frame is anchored to the surrounding area, and the purification plant is planted in the planting frame.

[0014] Furthermore, the front buffer zone is configured as a square pool, and a water outlet channel is provided on the side opposite to the sewage outlet, and the water outlet channel is connected to the bottom area of ​​the stepped purification zone.

[0015] Furthermore, a flow balancing trough is provided at the water outlet end of the static pool, and the flow balancing trough is located below the water outlet of each static pool.

[0016] Furthermore, the bottom wall of the flow balancing trough is arranged horizontally, and the depth of the flow balancing trough close to the static pool side is deeper than the depth of the flow balancing trough close to the stepped purification area.

[0017] Furthermore, the bottom wall of the diversion ditch is provided with a slope that gradually slopes downward from the outer edge to the side close to the static pool.

[0018] Furthermore, it also includes an ecological purification area and a wetland conservation area. The ecological purification area is set downstream of the front buffer zone, and the wetland conservation area is set downstream of the ecological purification area.

[0019] The utility model can achieve the following beneficial effects:

[0020] 1. The present application sets up a diversion ditch in the front buffer zone to collect sewage, and sets a blocking door on each still pool to realize the control and selection of the sewage collection area. The still pool can realize the static sedimentation of sewage and the preliminary treatment of pollutants in the sewage; the stepped purification zone is set up at the rear end of the still zone to make the sewage gradually flow through the first step and the second step, and the reasonable arrangement of plants on the first step and the second step can realize the gradual treatment of sewage, and the arrangement of the first step and the second step facilitates the replacement and treatment of purification plants; therefore, the front buffer zone of the present application can realize better hierarchical treatment of sewage, which reduces the difficulty of treating sewage discharged into the ecosystem, thereby reducing the degree of damage to the ecosystem.

[0021] 2. Planting purification plants in the planting rack can reduce the situation where the survival rate of purification plants is reduced by sewage erosion. It also makes it easier for staff to replace and replant plants with poor growth conditions.

[0022] 3. The setting of the flow trough can collect the sewage discharged from the static pool and discharge it evenly to various areas of the stepped purification zone, reducing the situation where uneven sewage discharge leads to drought in some areas of the purification plant and excessive water supply in some areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is an overall plan view of a tail water purification system for a water purification plant according to the present invention;

[0025] Figure 2 This is a plan view of the front buffer zone of the present invention;

[0026] Figure 3 for Figure 2 Schematic cross-section of the middle AA;

[0027] Figure 4 This is a plan layout rendering of the water outlet holes on the surface of the static pool of the utility model.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 1. Pre-buffer zone; 11. Sewage outlet; 12. Water outlet channel; 2. Diversion ditch; 3. Quiet zone; 31. Quiet pool; 311. Water outlet; 32. Blocking door; 33. Cover plate; 4. Step purification zone; 41. First step; 411. Slope section; 412. Flat slope section; 413. Planting point; 414. Planting groove; 42. Second step; 43. Third step; 5. Flow trough; 6. Ecological purification zone; 7. Wetland conservation zone. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0031] like Figures 1 to 4The figure shows a tailwater purification system for a water purification plant, comprising a pre-buffer zone 1, an ecological purification zone 6, and a wetland conservation zone 7. A dam is constructed at a certain distance from the tailwater outlet of a lake to form an artificial lake. The shoreline of the artificial lake retains the lake's original ditch inlet and rainwater inlet, with an inlet on the dam connecting it to the lake. At the artificial lake, the ecological purification zone 6 and the wetland conservation zone 7 are arranged sequentially from the shoreline to the center of the lake. The pre-buffer zone 1 is located between the sewage outlet 11 and the ecological purification zone 6. Sewage first passes through the pre-buffer zone 1 before being discharged into the ecological purification zone 6 and then into the wetland conservation zone 7.

[0032] By setting up a pre-buffer zone 1, sewage sedimentation, water flow buffering and preliminary sewage purification can be achieved; the ecological purification zone 6 mainly uses ecological measures to purify sewage and reduce the content of COD, ammonia nitrogen, total phosphorus and other contents in the water flow; the wetland conservation zone 7 mainly focuses on stabilizing water quality, restoring the ecosystem structure and building a clear water grass type ecosystem.

[0033] In this application, the front buffer zone 1 is set as a square space, and a diversion ditch 2, a still area 3 and a stepped purification area 4 are arranged in sequence from the periphery to the inside. The still area 3 includes several still pools 31. The sewage discharged from the sewage outlet 11 is directly collected in the diversion ditch 2, and then discharged from the diversion ditch 2 to each still pool 31, and finally discharged into the stepped purification area 4 through the still pool 31.

[0034] Specifically, the diversion ditch 2 is connected to each of the static pools 31, and the bottom wall of the diversion ditch 2 is provided with a slope that gradually slopes downward from the outer edge to the side close to the static pool 31, so that the sewage in the diversion ditch 2 can be discharged into the static pool 31 more smoothly. A blocking door 32 is provided on the side of each static pool 31 close to the diversion ditch 2, and the partition between the diversion ditch 2 and the static pool 31 can be achieved by opening and closing the blocking door 32. A number of water outlet holes 311 are provided on the side of the static pool 31 opposite to the blocking door 32, and the water outlet holes 311 are arranged above 1 / 2 of the height of the static pool 31; the area where the diversion ditch 2 and the static pool 31 are connected is located below the water outlet holes 311 and is provided close to the bottom of the static pool 31. When the stilling tank 31 of the present application is in operation, sewage continuously converges in the diversion ditch 2 and then flows into the stilling tank 31, and the sewage is stored in the stilling tank 31 and the diversion ditch 2 to achieve sedimentation of suspended matter; when the sewage is discharged next time, the sewage enters the diversion ditch 2 and is discharged into the stilling tank 31 from the blocking door 32. Since the blocking door 32 is arranged close to the bottom of the stilling tank 31, the newly discharged sewage can replace the sewage that has been stilled in the stilling tank 31, and the sewage that has been stilled is discharged from the outlet hole 311 and enters the stepped purification area 4.

[0035] If there is a lot of sediment in the still tank 31 and it needs to be cleaned, the blocking door 32 can be closed and the sewage below the outlet hole 311 in the still tank 31 can be pumped out by a water pump, and then the still tank 31 can be cleaned. Only part of the still tank 31 can be cleaned at a time, while the rest of the still tank 31 operates normally, so that cleaning the still tank 31 will not affect the discharge and static treatment of sewage. In addition, a cover plate 33 is installed above each still tank 31 to reduce the amount of external pollutants that fall into the still tank 31.

[0036] The stepped purification area 4 includes at least a first step 41 and a second step 42. In the embodiment of the present application, a third step 43 is also provided. The first step 41, the second step 42 and the third step 43 are arranged in order from high to low, and each step is planted with a purification plant for purifying sewage. Specifically, in the embodiment of the present application, loosestrife is planted on the first step 41, water celery is planted on the second step 42, and canna is planted on the third step 43. On the one hand, the above-mentioned plant varieties can purify the sewage discharged from the purification water plant. On the other hand, the above-mentioned plant varieties are aquatic plants and are more suitable for planting in the stepped purification area 4. On the third hand, loosestrife and canna are flowering plants, and water celery is an evergreen plant. The mutual reflection can improve the aesthetics of the front buffer zone 1 and create a beautiful ecological environment.

[0037] The first step 41, the second step 42 and the third step 43 all include a slope section 411 and a flat slope section 412, and the flat slope section 412 is set at the bottom of the slope section 411; a number of planting points 413 are set on the slope section 411, and a planting groove 414 is set in the flat slope section 412, and each planting point 413 is fixed with a planting rack, and a number of planting racks are also anchored in the planting groove 414. The purification plants are all planted in the planting racks, which are not shown in the figure. By setting the planting points 413 and the planting grooves 414, it is possible to store sewage, on the one hand, to provide a growth environment for the purification plants, and on the other hand, to enable the purification plants to fully purify the sewage. Setting the planting rack can, on the one hand, fix the purification plants and reduce the impact of the scouring of the sewage flow on the growth of the purification plants. On the other hand, it is convenient for the staff to replace and plant new purification plants, so as to facilitate the maintenance of the purification plants by the staff.

[0038] A flow equalizing tank 5 is also provided between the stepped purification area 4 and the static settling area 3. The flow equalizing tank 5 is located below the water outlet hole 311 of each static settling tank 31, and the sewage directly enters the flow equalizing tank 5 after flowing out of the water outlet hole 311. The flow equalizing tank 5 is in a zigzag shape, and the bottom wall of the flow equalizing tank 5 is horizontally arranged. The depth of the side of the flow equalizing tank 5 close to the static settling tank 31 is deeper than the depth of the side of the flow equalizing tank 5 close to the stepped purification area 4, so that sewage can be stored in the flow equalizing tank 5. Through the flow equalizing tank 5, the water flow rate flowing into each area of the stepped purification area 4 can be relatively average. Especially when some of the static settling tanks 31 are being cleaned, the sewage discharge volume in the area of this static settling tank 31 is small. Through the flow equalizing tank 5, the sewage discharged from each static settling tank 31 can be first aggregated and then evenly discharged to the stepped purification area 4.

[0039] An outlet channel 12 is provided on the side of the pre-buffer zone 1 opposite to the sewage outlet 11. The outlet channel 12 is connected to the bottommost area of the stepped purification area 4. Thus, after the sewage is purified through multiple stages, it can be discharged into the ecological purification area ⑥ through the outlet channel 12.

[0040] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water purification plant tail water purification system, characterized by: The invention comprises a front buffer zone (1) arranged at a sewage outlet (11), wherein the front buffer zone (1) comprises: A diversion ditch (2), the diversion ditch (2) being in communication with the sewage outlet (11) and being used to directly receive sewage discharged from the sewage outlet (11); A static area (3) comprising a plurality of static pools (31), each of the static pools (31) being in communication with the diversion ditch (2), and a blocking door (32) being provided on the static pool (31), the blocking door (32) being capable of isolating the diversion ditch (2) from the static pool (31); The stepped purification area (4) comprises at least a first step (41) and a second step (42) that are connected to each other, wherein the first step (41) is used for growing purification plants, and the second step (42) is used for growing another type of purification plant.

2. A water purification plant tail water purification system according to claim 1, characterized in that: A plurality of water outlet openings (311) are provided on a side of the static pool (31) opposite to the blocking door (32), and the water outlet openings (311) are arranged above 1 / 2 of the height of the static pool (31).

3. The tail water purification system of a water purification plant according to claim 1, characterized in that: The first step (41) and the second step (42) both comprise a slope section (411) and a flat slope section (412), wherein the flat slope section (412) is located at the bottom of the slope section (411), and a plurality of planting points (413) are provided on the slope section (411), and the flat slope section (412) is provided with a planting groove (414).

4. A water purification plant tail water purification system according to claim 3, characterized in that: The planting groove (414) and each planting point (413) are provided with a planting frame, the planting frame is anchored to the surrounding area, and the purification plant is planted in the planting frame.

5. The tail water purification system of a water purification plant according to claim 1, characterized in that: The front buffer zone (1) is configured as a square pool, and a water outlet channel (12) is provided on a side opposite to the sewage outlet (11), and the water outlet channel (12) is connected to the bottom layer area of ​​the stepped purification zone (4).

6. The tail water purification system of a water purification plant according to claim 2, characterized in that: A flow balancing groove (5) is provided at the end of the water outlet hole (311) of the static pool (31), and the flow balancing groove (5) is located below the water outlet hole (311) of each static pool (31).

7. A water purification plant tail water purification system according to claim 6, characterized in that: The bottom wall of the flow balancing trough (5) is arranged horizontally, and the depth of the flow balancing trough (5) close to the static pool (31) is deeper than the depth of the flow balancing trough (5) close to the stepped purification zone (4).

8. The tail water purification system of a water purification plant according to claim 1, characterized in that: The bottom wall of the diversion ditch (2) is provided with a slope that gradually slopes downward from the outer edge toward the side close to the static pool (31).

9. The tail water purification system of a water purification plant according to claim 1, characterized in that: It also includes an ecological purification area (6) and a wetland conservation area (7), wherein the ecological purification area (6) is arranged downstream of the front buffer area (1), and the wetland conservation area (7) is arranged downstream of the ecological purification area (6).

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