WO2015161811A1 - Pre-reservoir processing system characterized by landscape integration - Google Patents

Abstract

Disclosed is a pre-reservoir processing system characterized by landscape integration, composed of a supplemental water pumping station (1), an ecological interception area (2), a reinforced purification area (5), a deep purification area (8), and an ecological stabilizing area (9), wherein the supplemental water pumping station (1) first sends river water flowing to the lake into the ecological interception area (2), and then the water successively enters into the reinforced purification area (5), the deep purification area (8) and the ecological stabilizing area (9). The ecological interception area (2), the reinforced purification area (5), the deep purification area (8) and the ecological stabilizing area (9) are connected successively through overflow dams. The deep purification area (8) is composed of 3 concentric annulus dams (7) of different sizes.

Description

A pre-database processing system featuring landscape integration Technical field

The invention relates to a pre-library, in particular to a pre-library processing system featuring landscape integration.

Background technique

With the rapid development of the economy, the rapid growth of population, and the acceleration of industrialization and urbanization, the emission of nitrogen and phosphorus nutrients to water bodies is increasing, and the degree of eutrophication of lakes is increasing. When polluted water bodies flow into large areas of waters, The difficulty of managing eutrophication will be further increased. Therefore, it is necessary to set up a sewage treatment system at the mouth of the lake. The pre-treatment system is a practical technical method.

The classic front-loading dam is built in the estuary of the lake, and a small reservoir located upstream of the main lake reservoir is built to intercept the pollutants entering the main reservoir. In the past research of pre-banking system, it mainly concentrated in hilly areas, using natural slopes to achieve effective removal of sediment and N and P nutrients. Due to the special geographical conditions, the application of this technology has been limited. In recent years, this technology has been improved in China. For example, in Patent Publication No. CN1621622A, a non-point source pollution enhanced purification pre-column system in the plain net river area is disclosed, which effectively solves surface runoff pollutants, but can only be used for Non-point source pollution control; In addition, the Hukou District natural energy-driven pre-library system (patent publication number CN102134140A) patent proposes to add natural energy driving devices in the pre-bank processing system, and introduce the water into the water diversion buffer. After passing through the ecological interception and settlement zone, the intensive purification zone, the deep purification zone and the ecological stability zone, the pollution load of the lake is reduced by the loop cleaning and step by step of each treatment zone. Although these technologies solve the power problems required for the influent and enhanced purification of the reservoir area, the structures of each area are simple, the purification effect is not high, and the function is single, and only the purification is targeted, and the landscape effect is lacking.

Yancheng is located in Wujin District of Changzhou City. It is the oldest urban area preserved in China from the Western Zhou Dynasty to the Spring and Autumn Period. It covers an area of about 1 square kilometer and has a history of nearly 3,000 years. It is also the only three-city and three-river system in the world. The ancient city, from the inside out, Zicheng, Zicheng River, Inner City, Inner City River, Outer City, Waicheng River, three cities and three rivers. A thousand-year-old city that has experienced vicissitudes in Yancheng is still alive and well. It is now an important cultural relics protection unit and tourist attraction in the country. Referring to the historical and cultural background, the pre-depth deep purification area was designed into the three-city and three-river sets of geometric figures, which not only improved the role of the pre-pool processing, but also added the natural landscape effect, making the front-storage library beautiful and beautiful. Handling the organic combination with the landscape, the unity of environmental improvement and aesthetic enjoyment.

Summary of the invention

1. The technical problem to be solved by the invention

There is a single function for the treatment of pollutants in Hukou District. It can only be used for non-point source pollution control, but only for purification. At the same time, the existing pre-pool system has low processing efficiency and lack of landscape observability. Without a good solution, the present invention provides a pre-bank processing system characterized by landscape integration, which has the characteristics of high pollution load treatment efficiency, simple management and landscape effect.

2. Technical solutions

A pre-bank processing system featuring landscape integration, which includes five units of water pumping station, ecological interception zone, intensive purification zone, deep purification zone and ecological stability zone; the water pumping station first enters the lake into the water It is sent to the ecological interception zone, and then enters the intensive purification zone, the deep purification zone, and the ecological stability zone. The zones are connected by the overflow dam in turn. The area of the pre-treatment system should be designed according to the pollutant load, with an area of 15000- 25000m ² .

A pre-bank processing system characterized by landscape integration, wherein the enhanced purification zone and the ecological interception zone are parallel to each other, and the inflow water flows through the ecological interception zone and flows backward into the enhanced purification zone, and the enhanced purification zone is provided with water. Flower field; the ecological stability zone is downstream of the deep purification zone.

The stacked water field is composed of four ladder-shaped structures, each of which is regarded as a pool (paddy field), and is planted with aquatic flowers such as water lilies.

The deep purification zone is composed of three concentric annular earth dams of different sizes; the radius of the outer ring ring earth dam is 40-50 m, the middle ring earth dam radius is 25-30 m, and the innermost ring earth dam The radius is 15-20m; three concentric ring earth dams are connected to each other.

The ecological interception zone has an area of 4000-6000 m ² , the enhanced purification zone has an area of 3000-6000 m ² , the deep purification zone has an area of 5000-8000 m ² , and the ecological stable zone has an area of 3000- 5000m ² .

3. Beneficial effects

Compared with the prior art, the beneficial effects of the present invention are:

The pre-depot processing system of the present invention is connected in series through the overflow dam, and has a water drop effect, and the difference in the natural water formed upstream and downstream can enhance the aeration and increase the dissolved oxygen in the water body.

As the influent flows into the enhanced purification zone after passing through the ecological interception zone, it is more conducive to the sedimentation of suspended particles when the direction of the water flow changes.

In the enhanced purification area, there is a stacked water field, and the stacked water field makes the water flow in a stepped manner. The water flows down a pool (paddy field) through a pool (paddy field), and aquatic flowers such as water lily are planted in the pool to present the beauty of the flower. The water is lively and colorful, and it enhances the appearance while purifying the aquatic flowers and reducing the water and aeration.

The deep purification area is composed of three concentric circular earth dams of different sizes, which makes the inflow of water flowing between the ring earth dams, which not only increases the water retention time but also improves the water quality.

The deep purification area is designed into the geometric pattern of the three cities and three rivers. It has historical and cultural characteristics and aesthetic effects, and realizes the organic combination of treatment and landscape, and the unification of environmental improvement and aesthetic enjoyment.

DRAWINGS

1 is a schematic plan view showing a planar structure of a pre-bank processing system characterized by landscape integration;

Figure 2 is a schematic cross-sectional view of a stacked water field;

In the picture, 1-water pumping station, 2-ecological interception zone, 3-water flow direction, 4-overflow dam, 5-enhanced purification zone, 6-dual water flower field, 7-ring earth dam, 8-depth purification zone, 9- Ecological stability zone.

detailed description

The invention is further illustrated by the following figures and examples.

Example 1

A pre-bank processing system featuring landscape integration was constructed in a lake area of southern Jiangsu. The designed hydraulic load was 0.30m ³ /m ² /d (cubic meters / square meter / day), and the front reservoir surface The area is 25000m ² , the volume is 34000m ³ , the water intake is 6000m ³ /d, and the hydraulic retention time is 6d. The periphery of the front storage is mainly an earthy structure, and the areas are connected to each other by an overflow dam 4.

As shown in Figure 1, the front-bank processing system featuring landscape integration consists of a water pumping station 1, an ecological interception zone 2, an enhanced purification zone 5, a deep purification zone 8 and an ecological stabilization zone 9, and the water entering the lake passes through The water pumping station 1 first passes through the ecological interception zone 2, and then enters the enhanced purification zone 5, the deep purification zone 8, and the ecological stability zone 9 in turn; wherein the enhanced purification zone 5 and the ecological interception zone 2 are parallel to each other, and the influent passes through the ecological interception zone. After 2, the overflow dam 4 flows backward into the enhanced purification zone 5, and the enhanced purification zone 5 is provided with a stacked water field 6; the deep purification zone 8 is composed of three concentric annular earth dams 7 of different sizes and is connected to each other. Through; the ecological stability zone 9 is downstream of the deep purification zone 8.

The stacked water flower field 6 is a step-shaped structure (as shown in FIG. 2), and is composed of four step-shaped structures; the step-shaped structure is planted with aquatic flowers.

Ecological interception area: the area is 120m × 50m = 6000m ² ;

Enhanced purification zone: the area is 120m × 50m = 6000m ² ;

Deep purification area: the area is 8000m ² , the radius of the outer ring ring earth dam is 50m, the radius of the middle ring earth dam is 30m, and the radius of the inner ring of the inner ring is 20m;

Ecological stability zone: area 100m × 50m = 5000m ² .

After the purification of this project, the main conventional water quality indicators have been improved. After the sewage passes through the landscape front storage system, see the following table.

Example 2

In the Hukou District, a pre-bank processing system featuring landscape integration was constructed. The designed hydraulic load was 0.26m ³ /m ² /d (cubic meters / square meter / day), and the front reservoir surface area was 20000m ² , the volume is 26000m ³ , the water inflow is 5000m ³ /d, and the hydraulic retention time is 5d.

Its structure and parameters are as in Example 1, except that the area of the ecological interception area is 5000 m ² , the area of the enhanced purification area is 4000 m ² , the area of the deep purification area is 7000 m ² , and the radius of the outer ring ring earth dam is 46 m. The radius of the dam is 28m, the radius of the inner ring of the innermost ring is 17m, and the area of the ecological stability zone is 4000m ² .

After the purification of this project, the main routine water quality indicators have been improved, as shown in the table below.

Water quality index	Water quality index	TN (total nitrogen)	TP (total phosphorus)	SS (suspended matter)
					Influent concentration / mg.L -1	3.92±0.46	0.26±0.13	59.32±0.79	7.13±0.56
Effluent concentration / mg.L -1	2.65±0.73	0.15±0.16	28.73±0.89	4.25±0.53
					Average removal rate /%	33%	42%	52%	40%

Example 3

A pre-bank processing system featuring landscape integration was constructed in a Hukou area. The designed hydraulic load was 0.2m ³ /m ² /d (cubic meters / square meter / day), and the front reservoir water surface area was 18000m ² , the volume is 23000m ³ , the water intake is 4700m ³ /d, and the hydraulic retention time is 5d.

Its structure and parameters as in Example 1, except that the ecological interception area of 4000m ^2, strengthening purification area of 5000m ^2, the depth of the area of the purifying region 8 6000m ^2, the outermost radius of the ring dam 44M, intermediate ring soil The radius of the dam is 26m, the radius of the inner ring of the inner ring is 16m, and the area of the ecological stability zone is 3000m ² .

After the purification of this project, the main routine water quality indicators have been improved, as shown in the table below.

Water quality index	Water quality index	TN (total nitrogen)	TP (total phosphorus)	SS (suspended matter)
					Influent concentration / mg.L -1	3.83±0.39	0.25±0.18	38.56±0.89	7.13±0.56
Effluent concentration / mg.L -1	2.71±0.63	0.17±0.12	18.73±0.89	4.25±0.53
					Average removal rate /%	29%	32%	50.1%	40%

Example 4

A pre-bank processing system featuring landscape integration was constructed in a Hukou area. The designed hydraulic load was 0.2m ³ /m ² /d (cubic meters / square meter / day), and the front reservoir water surface area was 15000m ² , the volume is 20000m ³ , the water intake is 4000m ³ /d, and the hydraulic retention time is 5d.

Its structure and parameters are as in Example 1, except that the area of the ecological interception area is 4000 m ² , the area of the enhanced purification area is 3000 m ² , the area of the deep purification area is 5000 m ² , and the radius of the outer ring ring earth dam is 40 m. The radius of the dam is 25m, the radius of the inner ring of the inner ring is 15m, and the area of the ecological stability zone is 3000m ² .

After the purification of this project, the main routine water quality indicators have been improved, as shown in the table below.

Water quality index	Water quality index	TN (total nitrogen)	TP (total phosphorus)	SS (suspended matter)
					Influent concentration / mg.L -1	4.31±0.32	0.22±0.10	44.36±0.89	8.21±0.37
Effluent concentration / mg.L -1	2.82±0.58	0.13±0.12	21.73±0.89	4.95±0.55
					Average removal rate /%	35%	39.3%	51%	39%

Claims (6)

1. A pre-bank processing system characterized by landscape integration, characterized by: water pumping station (1), ecological interception zone (2), enhanced purification zone (5), deep purification zone (8), ecological stability District (9) consists of 5 units. The water pumping station (1) first sends the water into the ecological interception zone (2), and then enters the enhanced purification zone (5), the deep purification zone (8), and the ecological stability zone. (9) The ecological interception zone, the enhanced purification zone, the deep purification zone and the ecological stability zone are connected in sequence through the overflow dam.
2. The pre-bank processing system characterized by landscape integration according to claim 1, wherein the enhanced purification zone (5) and the ecological interception zone (2) are parallel to each other, and after the water enters the ecological interception zone (2) Reverse flow into the enhanced purification zone (5), enhanced purification zone (5) with stacked water field (6); the deep purification zone (8) consists of three concentric annular earth dams (7) of different sizes And connected to each other; the ecological stability zone (9) is downstream of the deep purification zone (8).
3. The pre-bank processing system characterized by landscape integration according to claim 2, wherein the stacked water field (6) is a stepped structure and is composed of four stepped structures.
4. The pre-bank processing system characterized by landscape integration according to claim 2, characterized in that: three different-sized concentric ring earth dam rings (7) of the deep purification zone (8) are the most The radius of the ring earth dam of the outer ring is 40-50m, the radius of the middle ring earth dam is 25-30m, and the inner ring earth dam is 15-20m.
5. The pre-bank processing system characterized by landscape integration according to any one of claims 1-3, wherein the pre-bank processing system has an area of 15000-25000 m ² ; In the 3000-6000 m ² ; the enhanced purification zone, the area is 4000-6000 m ² ; the deep purification zone has an area of 4000-7000 m ² ; and the ecological stability zone has an area of 4000-6000 m ² .
6. The pre-bank processing system characterized by landscape integration according to claim 3, wherein the step-shaped structure is planted with aquatic flowers.

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