CN208561730U - It is a kind of for handling the filtrate of the suspension rapid filter of closure option - Google Patents

Abstract

The utility model discloses a kind of for handling the filtrate of the suspension rapid filter of closure option, its main body is formed using ethylene-vinyl acetate copolymer foamed plastic production, shape is in cylinders shape, and each cylinder has corner angle, to make to form the CSO filter layer floated on sewage to be filtered in the suspension rapid filter in filtering Shi Yuchi inner periphery filtrate mutual extrusion stratification.Filtrate provided by the utility model, it is rough surface, multi-angular, the shape of its cylinders shape is conducive to form closely floating filter layer in sewage surface when by Sewage shock between filtrate in pond, bottom-up quick filtering is carried out to CSO, energy effectively catching lives most of particulate pollutant in sewage, to reduce SS the and COD concentration in rainy day closure option, it is very suitable for the quick filtration treatment of rainy day combined sewer overflow；Low manufacture cost simultaneously is conducive to mass production, is that ideal CSO quickly filters suspended filter material.

Description

It is a kind of for handling the filtrate of the suspension rapid filter of closure option

Technical field

The utility model relates to the processing of rain technical field of sewage, especially combined sewer overflow, and in particular to a kind of For handling the filtrate of the suspension rapid filter of closure option.

Background technique

When the rainy day of drainage system region, with the increase of rainfall, Rainfall runoff correspondingly increases, and works as pipeline flow More than the main pipe that shuts off conveying capacity when, overflow will occur, part rain dirt combined sewage is discharged into receiving by overflow well or pumping plant Water body and generate overflow, which is combined sewer overflow (CombinedSewer Overflows, CSO).In city After point-source pollution is gradually controlled, city CSO has become city of the world's water environment pollution, ecology as typical non-point pollution The major reason of system imbalance, if city CSO is not controlled, the polluter for being directly discharged into natural water body will seriously destroy city City's water quality and the recovery for influencing function of water body.

Combined sewer overflow variation water quality is big, and part water quality is much higher than sewage, thus initial rainwater and CSO etc. are to receiving water body Pollution it is extremely serious.CSO control measure can be divided mainly into source control, pipe-line system controls, storage is regulated and stored and end-o f-pipe -control Four major class, but China mostly uses storage the control means such as to regulate and store at present, and there is no be completely directed to the biggish pollution of these waters The treatment facility in source.

Suspension rapid filter can be applied to pipe network end as a kind of CSO end-o f-pipe -control equipment, carry out fastly to river rain sewage is entered Speed processing.When operation, rain sewage to be filtered enters suspension rapid filter and is filtered from bottom upwardly through filtrate, and filtrate is by floating Power and water flow impact pressure compacting compress, and retain pollutant, so that combined sewer overflow pollution is efficiently controlled, to the SS of rain sewage Good removal effect is generated with COD.As it can be seen that the function superiority and inferiority of filtrate quality has been largely fixed the quick filtering ponds of suspension To the treatment effect of CSO, select and design suitable filtrate, to handle closure option it is really necessary to.

The filtrate of sewage treatment at present is mostly that specific gravity is larger or need the filtrate of longer hydraulic detention time, to apply to water It flows in the suspension rapid filter filtered from bottom to top, then the specific gravity of filtrate need to be less than water, and otherwise filtrate can not suspend in water, can not It squeezes stratification and forms filter layer, cause it bad to the treatment effect of CSO.In view of the above-mentioned problems, also there is part researcher to open Send out that specific gravity is relatively light, the filtrate suitable for quickly filtering.

For example, application No. is 03104773.4 utility applications to disclose a kind of fiber filter of water process Material, the filtrate are made of tow joint and the tow circle being fixed therein and tailfiber tow, and wherein tow circle and tailfiber tow are by planting The monfil boundling of one or more of fibres or hydrophily staple fibre forms, tow joint be plastics, ceramics, Solid made of rubber or metal or porous body with holes, are mainly used for the separation of various suspended impurities in sewage, especially suitable It closes and is separated containing the suspended impurity of oils or lipid.Though the filtrate is applicable in quickly filtering, density is smaller, close to water, to Filtering layer is formed, specific gravity is still excessive, and it is fiber filtering, easily mutually winding between fiber filament after long-time service, therefore still It is not suitable for using in CSO rapid filtering device.

For another example, application No. is 00205026.9 patent documents to disclose a kind of novel water treatment filter medium, the filtrate by Extrusion molding after plastic foamed, sets filtration channel and micropore in it.But it is only applicable to carry out refined filtration to the preferable water of water quality, And combined sewer overflow is dirtier, and is not suitable for, and its filtrate internal structure is complicated, manufacturing process is relatively cumbersome, higher cost.

For another example, application No. is 201410437905.5 utility applications to disclose a kind of deferrization and demanganization suspension Filtrate and preparation method thereof, for the filtrate by manganese sand, expanded perlite and plastic pellet through artificial synthesized, specific gravity is less than water, can It suspends in water.But the filtrate is designed, therefore since it manufactures material mainly for iron ion, the manganese ion in sewage Also it is not particularly suited for CSO filtering.

The disclosure of background above technology contents is only used for the inventive concept and technical solution that auxiliary understands the utility model, The prior art for not necessarily belonging to present patent application shows above content in the Shen of present patent application in no tangible proof Please have disclosed a few days ago in the case where, above-mentioned background technique should not be taken to the novelty and creativeness of evaluation the application.

Utility model content

The main purpose of the utility model is that proposing that a kind of specific gravity is less than water, rough surface, has corner angle, partial size appropriate For the filtrate that CSO is quickly filtered, reach the good filter effect quickly filtered to CSO.

The utility model proposes following technical scheme for the above-mentioned purpose:

It is a kind of for handling the filtrate of the suspension rapid filter of closure option, main body uses ethene-vinyl acetate Co-polymer foamed plastic production forms, and shape is in cylinders shape, and each cylinder has corner angle, with the week in filtering and in pond Side filtrate mutual extrusion stratification, makes to form the CSO filter layer floated on sewage to be filtered in the suspension rapid filter.

Preferably, wherein one end of all cylinders is connected to the same central part, and the other end is respectively towards different sides To extension.

Preferably, each cylinder has the same shape and dimensions.

Preferably, the cylinders shape is that stereo cross is starlike.

Preferably, four cylinders of the starlike main body of stereo cross have the same shape and dimensions.

Preferably, the outer dimension of the starlike main body of the cross is no more than 2cm.

Preferably, the outer dimension of the starlike main body of the cross is no more than 1cm.

The filtrate that the utility model preceding solution provides, in the suspension rapid filter of processing combined system rainy day overflow sewage Interior, density is much smaller than water, can float on waterborne, and rough surface, multi-angular, and the shape of cylinders shape is conducive to filter pond in Closely floating filter layer is formed in sewage surface when by Sewage shock between material, CSO is carried out bottom-up quick Filtering, can effectively catching live most of particulate pollutant in sewage, thus reduce SS in rainy day closure option and COD concentration is very suitable for the quick filtration treatment of rainy day combined sewer overflow；In addition ethylene-vinyl acetate copolymer foamed modeling Expect that property is stablized, it is cheap, and this filtrate simple shape, it is conducive to mass production, therefore it closes the processing rainy day It is ideal quickly filtering filtrate for the suspension rapid filter of stream overflow sewage.

It on the other hand, can be using the clear water obtained after rapid filter filtering by filtering fastly when completion filtering is backwashed It carries out top-down backwash at the top of pond, the particle being adsorbed on filtrate can be made by phase mutual friction again between filtrate when flushing Contact scar object is washed out and sinks to bottom of pond and clear up, and when cleaning is fast and simple.

Detailed description of the invention

Fig. 1 is the filtrate for the rapid filter that suspends that one specific embodiment of the utility model provides；

Fig. 2 is the shape assumption diagram for the starlike filtrate of stereo cross that the preferred embodiment in the utility model provides.

Specific embodiment

The utility model is described in further detail with specific embodiment with reference to the accompanying drawing.

When rainy day rainfall is big, the processing of combined sewer overflow (CSO) is while guaranteeing certain treatment effect with greater need for quick Efficiently.High-quality filtrate needed for CSO suspension rapid filter should not only have good interception effect, moreover it is possible to generate centainly to pollutant Suction-operated, to reach good quick filter effect.Therefore, ideal filtrate should at least meet: when sewage passes through filtrate Filtrate can be compacted to form closely floating filter layer in water outlet, so that most graininess pollutant is removed, and It can be good at expansion in backwash to scatter, attachment eluted by mutual collision friction.The utility model it is specific Embodiment provides just such a filtrate for being highly suitable for CSO suspension rapid filter, and its technical solution is as follows:

It is a kind of for handling the filtrate of the suspension rapid filter of closure option, main body uses ethene-vinyl acetate Co-polymer foamed plastic production forms, and shape is in cylinders shape, and each cylinder has corner angle, with the week in filtering and in pond Side filtrate mutual extrusion stratification, makes to form the CSO filter layer floated on sewage to be filtered in the suspension rapid filter.It selects Ethylene-vinyl acetate copolymer foamed plastics make filtrate, and density is much smaller than water (about 55kg/m³), even if in filter process The density of density after middle water suction also much smaller than water, it is ensured that there is good buoyancy always during the filtration process, it is specific and Speech, when starting water suction, density can be changed to about 137.5kg/m³, filtrate global density becomes during filtering ponds stable operation About 200kg/m³, variable density be conducive to the later period backwash when filtrate expansion and friction；In addition, its rough surface, it can be effective Graininess pollutant is adsorbed, good filter effect is reached.

In a preferred embodiment, filtrate main structure is what multiple cylinders were constituted, wherein one end of multiple cylinders It is commonly connected together, the other end extends towards different directions respectively, to can mutually stick between filtrate, especially in water flow Under percussion, mutually it is stuck to form the filter layer of consolidation.It is highly preferred that each cylinder is of similar shape and ruler It is very little.It such as is all rectangular scapus.

In a specific embodiment, the filtrate is that stereo cross as depicted in figs. 1 and 2 is starlike, and there are four columns for tool Body 1,2,3,4, four cylinders are cubics, are integrally formed the filtrate with multiple contact surfaces and multiple corner angle, it is convenient with The filtrate of surrounding mutually blocks, while having more contact surfaces with enlarged contact resistance with filtrate around, in turn, it is ensured that The combining closely between filtrate during bottom-up impact filtration.

It is furthermore preferred that four cylinders of the starlike filtrate of above-mentioned cross are also that shape and size are identical, also, each cylinder Two of them opposite be all that one is long and the other is short, for example, one of face L1 of cylinder 1 is shorter, opposite L2 is then longer, this Sample is conducive to block combination.

The size of filtrate can be set as the case may be, and the filter layer gap that should not be otherwise formed greatly very much is too many, usually It is set as several millimeters or 1cm, 2cm etc., the size that should not be too large.Also unsuitable too small size, it is too small to cause to filter pressure head Rise, increases power consumption, be generally best with several millimeters.

The utility model provides one kind suitably, efficiently to administer the suspension rapid filter of rainy day closure option , inexpensive filtrate, suitable ethylene-vinyl acetate copolymer filtrate is packed into suspension rapid filter using preceding, sewage from Pond bottom enters filtering ponds, and the water constantly accumulated, which floats filtrate, gradually impacts the filtering that top delivery port forms consolidation Layer.In addition, ethylene-vinyl acetate copolymer filtrate can be relied on by the filtered clear water of suspension rapid filter as backwashing water Backwash head is backwashed, while clear water can provide backwashing water for the filter chamber backwashed after the filter of other filter chambers, It does not need to provide additional water and energy.In backwash, the utility model filtrate is conducive to later period recoil due to variable density The expansion and friction of filtrate when washing, while attachment is eluted under backwash head effect.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is only limited to these instructions.For those skilled in the art of the present invention For, without departing from the concept of the premise utility, several equivalent substitute or obvious modifications, and performance can also be made Or purposes is identical, all shall be regarded as belonging to the protection scope of the utility model.

Claims (7)

1. a kind of for handling the filtrate of the suspension rapid filter of closure option, it is characterised in that: its main body uses ethylene- Vinyl acetate copolymer foamed plastic production forms, shape be in cylinders shape, and each cylinder have corner angle, with filtering when with Periphery filtrate mutual extrusion stratification in pond, makes to form the CSO mistake floated on sewage to be filtered in the suspension rapid filter Filtering layer.

2. filtrate as described in claim 1, it is characterised in that: wherein one end of all cylinders is connected to the same center Portion, the other end extend towards different directions respectively.

3. filtrate as claimed in claim 2, it is characterised in that: each cylinder has the same shape and dimensions.

4. filtrate as claimed in claim 2, it is characterised in that: the cylinders shape is that stereo cross is starlike.

5. filtrate as claimed in claim 4, it is characterised in that: four cylinders of the starlike main body of stereo cross are having the same Shape and size.

6. filtrate as claimed in claim 5, it is characterised in that: the outer dimension of the starlike main body of the cross is no more than 2cm.

7. filtrate as claimed in claim 6, it is characterised in that: the outer dimension of the starlike main body of the cross is no more than 1cm.