CN101293699A

CN101293699A - Riverbed type percolation filtration water quality purification technique for renovation of municipal pollution river water

Info

Publication number: CN101293699A
Application number: CNA200710098794XA
Authority: CN
Inventors: 申欢; 宋乾武
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-27
Filing date: 2007-04-27
Publication date: 2008-10-29

Abstract

The invention discloses a river bed infiltration water purification technology used for repairing the water body of polluted city rivers, which follows that below the river beds of city rivers, the purification structure of a filler infiltration bed (3) is built, by utilizing water head (the height of water formed by artificial construction rubber dam or the natural height of water of river channels), polluted river water is transported to a water distribution system (2) by adopting a floating type water getting device (1), the river water to be treated is evenly distributed to the whole purification unit of the filler infiltration bed (3) by the water distribution system (2), and the river water after a purification treatment is discharged into the lower reaches of river channels by a water collecting system (4). The purification technology of the invention realizes an effective purification treatment on the river water simultaneously without occupying limited land resources at the two sides of the river channels, thus not changing the shape of the river channels, not influencing the flow of the river water, nor having any negative impact on the landscape effect of the two banks of the river channels.

Description

A kind of river channel diafiltration water purification technology that is used for the reparation of municipal pollution river water

Technical field

The invention belongs to water environment pollution control engineering field, relate to a kind of river channel diafiltration water purification technology that the municipal pollution river water is repaired that is used for.

Background technology

In recent decades, along with the continuous increase of urban population and the deficiency of land area, and people are to the unreasonable transformation regulation of city river (as curve cut-off, channelization, sclerosis etc.), cause that riverbank form and regimen of river are single, the ecosystem has been subjected to havoc, the stream's self-purification ability weakens greatly.Because municipal effluent is collected and the treatment system construction lags behind, a large amount of sanitary sewages, trade effluent, rainwater etc. directly are discharged in the urban river, cause stream pollution in addition.Problems such as water environment pollution in various degree, landscape water body function reduction, ecological degradation have all appearred in the most of urban rivers of China at present, even black smelly river occurs in some cities.This situation grievous injury of city rivers pollution urban ecological environment image and investment environment, greatly restricted continuous development of society economy, and influenced local people's orthobiosis and activity in production and even HUMAN HEALTH.

At present, the monotechnics of stream pollution improvement and restoration of the ecosystem mainly contains physics method, chemical method and biology/ecotechnology 3 big classes.Generally speaking, physics method and chemical method all have the processing cost height in varying degrees, may the safety of river ecosystem be exerted an influence, short run effect is good but do not have problem such as long-term effect, therefore is only applicable to special emergency processing usually.Compare with chemical method with the physics method, biology/ecotechnology has following characteristics: 1. can continue performance and fortified water body pollution cleaning action; 2. can promote the reparation of river ecosystem; 3. the required input energy, material are few, and required behavior adjustment management control is few, more economical; 4. side effect is little, and nature is safe from harm or endangers very little.Therefore biology/ecological method becomes the one preferred technique of stream pollution improvement and restoration of the ecosystem.The biology that is used for stream pollution improvement and restoration of the ecosystem at present and ecotechnology mainly contain that to contact oxidation technology, artificial swamp technology, many natural types river course constructing technology and ecological revetment technology etc. between aquatic plant purification method, gravel several.

At present the principal feature of China's urban river is: the river course regulation of being hardened, and the river course form is single, no river shoal, the riverbank can utilize the soil in short supply on every side, and no streamside waterplant is with, and a little less than the ecosystem was seriously damaged, is highly brittle, self-purification capacity was poor.More than the multiple common stream pollution biology/ecological reestablishment of Jie Shaoing often can not be used in the improvement of city river, and perhaps efficient is low excessively.As because urban land resource is limited, near urban river, often there is not big area therefore to be not suitable for adopting resembling contacting the water purification technology that oxidation technology needs big floor space like this between artificial swamp, gravel for the soil that utilizes.Waterplant can absorb pollutents such as a part of nitrogen, phosphorus, but a little less than its effect, major function is still recovered the landscape effect in river course, the auxiliary ecosystem of setting up the river course.In addition because the sclerotic type river course all is to adopt materials such as concrete, cemented rock to build, the river course that will harden is fully removed, rebuild many natural types river course and will have great, the constructional difficulties of quantities with the construction ecological revetment, improvement expenses is crossed problems such as height, is difficult to realize in China.Therefore be badly in need of development of new, efficiently, be suitable for the water pollution recovery technique of urban river characteristics.

Summary of the invention

The present invention provides a kind of practicable solutions to the difficult point of aforementioned municipal pollution river water reparation.This method mainly is to purify structures by build filler diafiltration bed under the riverbed, adopts intake that contaminated river is sent into the diafiltration bed and carries out purifying treatment, flows back to the river course in downstream through the river that purifies.Fill special filler in the diafiltration bed, can effectively remove COD, N, pollutents such as P, SS in the river.The characteristics of this method are to realize river in the efficient purifying treatment, need not to take city river both sides limited land resources, can not change the form in river course, can not influence flowing and flood passage of river, can not produce any negative impact yet two sides, river course landscape effect.This method mainly is made of parts such as floated water fetching device (1), water distribution system (2), filler percolation treatment unit (3), water gathering system (4), exhaust system (5), as shown in Figures 1 and 2.

Description of drawings

Accompanying drawing 1 is a river channel diafiltration water purification system sectional view, and accompanying drawing 2 is river channel diafiltration water purification system orthographic plans.

Nomenclature is as follows in the accompanying drawing:

1---the floated water fetching device: intake floats on the water surface, can must fluctuate with the river surface water level to regulate automatically, keeps even water distribution; Intake has filter, can effectively remove drift big in the water, avoids the obstruction of packing layer; From the river surface surface water taking, guarantee to have in the water dissolved oxygen of higher concentration.

2---water distribution system: adopt the perforated pipe water-distributing device, pending river is assigned to the entire treatment unit uniformly, avoid occurring " short stream ".

3---filler percolation treatment unit: fill the hard filler and the rich ferruginous material of certain proportion of certain particle size range in the diafiltration bed, can effectively remove COD, N, pollutents such as P, SS in the river.

4---water gathering system: adopt the perforated pipe captation, the river after purifying is collected uniformly from the entire treatment unit and discharged, avoid occurring " short stream "

5---exhaust system: the small amount of exhaust gas that produces in the contaminant removal process is in time discharged, avoid the too much gas of accumulation in the packing layer, influence treatment effect.

Embodiment

Utilize waterhead (manually building the height of water of rubber dam formation or the height of water of river channel natural), adopt floated water fetching device (1) that polluted river water is delivered to water distribution system, by water distribution system (2) pending river is assigned to whole filler diafiltration bed clean unit (3) uniformly, the river after the purifying treatment is discharged in the river course in downstream by water gathering system (4).The small amount of exhaust gas that produces in the pollutant purification process is in time discharged by exhaust system (5).

Claims

1. one kind is used for the river channel diafiltration water purification technology that the municipal pollution river water is repaired, it is characterized in that under the riverbed of urban river, building filler diafiltration bed and purify structures (3), adopting floated water fetching device (1) that polluted river water is delivered to filler diafiltration bed clean unit (3) handles, river after the purifying treatment is discharged in the river course in downstream, and the small amount of exhaust gas that produces in the pollutant purification process is in time discharged by exhaust system (5).

2. the river channel diafiltration water purification technology that a kind of municipal pollution river water according to claim 1 is repaired, it is characterized in that, described filler diafiltration bed purifies structures (3) and builds below the riverbed, river course, do not take city river both sides limited land resources, do not change the form in river course, can not produce any negative impact two sides, river course landscape effect; The top of diafiltration bed purification structures is equal with former river bed, does not influence the flood passage in the mobile and river course of river.

3. filler diafiltration bed according to claim 2 purifies structures (3), it is characterized in that inner certain particle size range (the rich ferruginous material of 5～15cm) hard filler and certain proportion (2～5%) of filling of diafiltration bed.

4. the river channel diafiltration water purification technology that a kind of municipal pollution river water according to claim 1 is repaired is characterized in that described floated water fetching device (1) floats on the water surface, can regulate automatically with the fluctuation of river surface water level, keeps even water distribution.

5. floated water fetching device according to claim 4 (1) is characterized in that utilizing waterhead (manually building the height of water of rubber dam formation or the height of water of river channel natural) to supply water and water distribution to processing unit, need not power consumption.

6. floated water fetching device according to claim 4 (1) is characterized in that from the river surface surface water taking, guarantees to have in the pending river the higher dissolved oxygen that gets.

7. floated water fetching device according to claim 4 (1) is characterized in that intake is provided with thin filter, can effectively remove the floating matter in the river, avoids the obstruction of packing layer.

8. the river channel diafiltration water purification technology that a kind of municipal pollution river water according to claim 1 is repaired, it is characterized in that, described exhaust system (5) can effectively be got rid of the waste gas that produces in the scavenging process, avoids the too much waste gas of accumulation in the packing layer, influences treatment effect.