CN202844748U - Integrated upward-flow water treatment device - Google Patents

Abstract

The utility model discloses an integrated upward flow water treatment device. The device comprises an inclined pipe settling zone, a filtering zone and a water outlet zone, wherein the inclined pipe settling zone is arranged at the lower end of the filtering zone; the water outlet zone is arranged at the upper end of the filtering zone; a sediment mud discharging zone is arranged at the lower end of the inclined pipe settling zone; a device water inlet pipe is arranged inside the sediment mud discharging zone; a water outlet end of the device water inlet pipe corresponds to an inclined pipe water inlet end of the inclined pipe settling zone; a filtering material is arranged in the filtering zone; a filtering water distribution zone is further arranged between the inclined pipe settling zone and the filtering zone; a washing and backwashing water inlet pipe is arranged in the filtering water distribution zone; and the water outlet zone is provided with a water outlet pipe. According to the integrated upward-flow water treatment device disclosed by the utility model, the filtering water distribution zone is arranged between the inclined pipe settling zone and the filtering zone to form a backwashing technology combining inclined pipe settling and upward flow filtering, therefore, a good treatment effect of a filtering tank is realized, and the defects of the conventional inclined pipe settling technology are overcome.

Description

A kind of integral type upward flow water treatment facilities

Technical field

The utility model relates to a kind of water technology, be specially adapted to industry and civilian drinking water, sewage, rainfall runoff are processed, use the device that this technology produces and have automatic back-flushing function, being easy to back washing washs, it is convenient, effective to process, and keeps in repair in time that can be shorter when filter breaks down, have simultaneously detachably, performance movably, go for the place (temporarily feeding water such as construction waste water, rural area) that the water treatment place often changes.

Background technology

At present, all there is corresponding deficiency in the technology such as precipitation, filtration in the common process.For precipitation, traditional vertical sedimentation basin, radical sedimentation basin, horizontal sedimentation tank, floor space and structures volume are comparatively huge, and the removal efficient of unit are is lower, is treated to example with feedwater, processes load at 1 ~ 2.3m ³/ (m ².h) about.Some scholars has worked out inclined tube or inclined-plate clarifying basin for this reason, has reduced the floor space of sedimentation basin, processes load and can reach 5 ~ 9m ³/ (m ².h), be 4 ~ 5 times of horizontal sedimentation tank.Yet in actual use, because caliber and the spacing of inclined tube and swash plate are less, in a single day spoil disposal freely will not cause obstruction, cause this technology in the restriction of application facet, and in the drinking water treatment field of sewage disposal and high algae pollution, this technology all should not adopt.Obstruction and spoil disposal problem are the major limitation sexual factors of this technology performance effect.The tradition sedimentation basin carries out spoil disposal by the driving of discharge pipeline and spoil disposal, can't use backwashing system, thereby traditional sedimentation basin just can't be used backwashing system and carries out sludge discharging area and clean.In addition, traditional sedimentation basin (comprising advection and inclined tube), pond face area (generally take up an area 1200m greatly ²About/seat), the water yield (2000m in technique ³About/(seat .h)) proportion is larger, and inconvenience is stopped running in the water treatment procedure, let alone the backwash of the rear sludge discharging area of stopping running, and therefore traditional sedimentation basin is to be combined with backwashing technology, carries out the mud cleaning of sludge discharging area.

For filtering technique, particularly under being that mostly adopt of sand filtration to flowing through the filter technology, be filtered water and rely on the gravity head mode by filtrate, the dirt in the water is dammed by sand filter bed absorption.Owing to the gravity reason, after the lower filtrate backwash to flowing through in the filter technology, lower floor's particle diameter of filter medium large (weight) usually can appear, and the space is large between filtrate, upper strata filtrate tiny (gently), the little waterpower lamination in space between filtrate.After the waterpower layering, the space is little between the filtrate of upper strata, and the loss of flood peak is large, has consumed a large amount of heads, holds back to cause that the whole loss of flood peak increases rapidly in the filter process behind the pollutant, has shortened backwashing period.Because up-thin-low-thick lamination causes pollutant only to be trapped in the surface, the bottom filtrate is not brought into play rejection effect, and the utilization rate of filtrate is relatively on the low side, and filter effect is relatively poor.When this phenomenon runs up to a certain degree, in the time of will causing recoiling, the filtrate wash-out be attached not thorough, and sand filter bed stops up, and top layer fine filtering material runs off.Run into this situation, just need to change filtrate, by manually washing in a pan out and place mat, workload is large fully, and very bothers.In order to improve filtrate pollutant desorption effect as far as possible, can only take to improve the way of backwash rate, the service life that can reduce like this filtrate.For the multilayer filtrate, strengthen the mixed layer that back washing strength can increase the weight of filtrate, cause to filter and lost efficacy, recover same quite trouble.

Chinese scholars has proposed the concept of upward flow filtration technology in theory research for this reason.The upward flow mode of operation can reduce the loss of flood peak of filtration by contrast, prolongs filter cycle, improves the utilization rate of filtrate, has optimized mass transfer condition.But upward flow filter, especially upward flow sand filter majority rests on theory stage, and practical application less just slightly embodies in activated carbon filter.This is that particularly upward flow sand filter delivery turbidity is high owing to existing upward flow filter, and the filtering layer backwash is difficult for the shortcomings such as clean, has limited usage space.Flow velocity is low not to have certain expansion rate can not reach good mass transfer condition, but flow velocity is high, and filtrate expands severe, makes water outlet small particles thing very obvious, and this has limited the propagation and employment of upward flow filtering equipment to a certain extent.Therefore along with the continuous lifting of various water standards, improving constantly of management and specification requirement, traditional all there is larger drawback to stream and upward flow filtration technology down, be difficult to adapt to the requirement of new water quality, management and operation, in original technical improvement of innovating, develop new treatment technology imperative.

In addition, aspect construction, the device under the conventional art generally is to be built to build by civil engineering structure to form, the user needs to invite designing institute to design according to the water quality and quantity characteristics of oneself, invites unit in charge of construction to build again, and flow process is complicated, cycle is long, and this has brought unnecessary burden to the user.The operation aspect traditional mostly is outdoor structures to flowing through the filter device down, is subject to the impact of the external conditions such as temperature, illumination, rainfall, and service condition and automation integrated horizontal are not high, affect operational efficiency.The in addition filter tank of the fixing civil engineering structure form of this tradition, construction cost is higher, can not adapt to, the sewage disposal of the roving construction site of short needs of the time of staying, flexibility is inadequate.

For above problem, study especially and propose a kind of integral type upward flow water technology, combine and absorb and optimized Inclined-tube Settling Technology, upward flow filtration technology, and increase the Novel backwashing technology merges and has formed a kind of integral type upward flow water technology.This technology has been brought into play fully the height of tube settler and has been processed load, low floor space, the low energy consumption of upward flow filtration technology, backwashing period length, high efficiency advantage, simultaneously also having solved tube settling easily stops up, the upward flow filtration water outlet is poor, filter cycle is short, the shortcoming of operation inconvenience, is a new technology with fine development prospect.This technology can adopt the form of establishment to be achieved simultaneously, reduces and builds difficulty, improves service condition, improves the efficiency of management.

Summary of the invention

Technical problem

In order to overcome the above problems, existing treatment technology weak point is improved.Being intended to solve traditional tube settling easily stops up, the upward flow filtration water outlet is poor, filter cycle is short, the shortcoming of operation inconvenience, and with the two advantage common water treatment efficiency that improves that combines, this technology can be brought into play by the establishment form simultaneously, can solve conventional art construction period length and the not high shortcoming of automaticity.

Technical scheme

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of integral type upward flow water treatment facilities, it is characterized in that: comprise tube settling district, filtering area and exhalant region, described tube settling district is arranged on the filtering area lower end, in the upper end of filtering area described exhalant region is set, lower end in described tube settling district is provided with the precipitation sludge discharging area, in the precipitation sludge discharging area, be provided with the device water inlet pipe, the inclined tube water inlet end in the corresponding described tube settling in the water side of described device water inlet pipe district; Be provided with filtrate at described filtering area; Between described tube settling district and filtering area, also be provided with the filtration water distributing area, be provided with at the filtration water distributing area and clean and the backwash water inlet pipe; The outlet pipe that is provided with at described exhalant region.

Described inclined tube is evenly arranged.

Above the cleaning of described filtration water distributing area and backwash water inlet pipe, be provided with backwash water distribution panel.

Also be provided with a filtrate balance pressing plate in described filtering area filtrate upper end.

The density p of pressing plate _pFor:

${\mathrm{\&rho;}}_p={\mathrm{\&rho;}}_0+\frac{221\&CenterDot;{\mathrm{\&mu;}}^{0.46}{(1-m_s)}^{1.46}{(e+m_s)}^{2.31}{L}_{\mathrm{<figure-callout\; id="3"\; label="S\; m\; s"\; filenames="120711122543.png"\; state="\{\{state\}\}">S</figure-callout>}}}{{m_s}^{}}-\frac{({\mathrm{\&rho;}}_s-\mathrm{\&rho;})(1-m_s)L_S}{(1-m_p)L_p}$

Wherein, m _pThe porosity of-pressing plate (producer provides), m _sPorosity under the-filtrate unswollen state (2 ~ 5%); ρ ₀The density of-water, ρ _s-filtrate density, g/cm ³L _pThe thickness of-pressing plate, L _sThickness under the-filtering layer swelling state, cm; d _s-the sphere diameter identical with the filtering material particle volume, cm; Ф-filtering material particle sphericity coefficient; The expansion rate of e-filtrate, %; The dynamic viscosity of μ-water, pa.s.

Be provided with whole filtrate at described filtering area and fill box, in whole filtrate is filled box, be filled with whole filtrate.

The utility model merges Inclined-tube Settling Technology and pore water distribution uniformity technology, and inclined tube is evenly arranged, and with its water distribution system as subsequent technique (filtration), carries out the water distribution of subsequent technique with inclined tube.Because inclined tube has good sedimentation effect, deposition efficiency is the several times of common horizontal sedimentation tank, can bring into play efficient sedimentation effect in limited space.Make it carry out initial gross separation to the turbidity in the water, the bulky grain thing is removed by the effect of precipitation, to reduce the processing load of subsequent technique, prolong filter cycle.Therefore, the water distribution system of conventional filtration has not only been saved in the fusion of this technology, has reached the purpose of water distribution uniformity, and can tentatively remove water pollutant, promotes the turbidity removal effect that filters and prolongs filter cycle.

The utility model has adopted the upward flow filter filtering technique, and filtrate is in the microdilatancy state under the effect of balance pressing plate, thereby the loss of flood peak is little, and energy consumption is low.The filtrate utilization that is under the Micro Fluid swelling state is abundant, pollutant can contact with filter material layer more abundant, can not occur lower to stream technology mesexine filtrate overload, the phenomenon that dull filtrate is not fully utilized, it is long that this technology has backwashing period, the utilization rate of filtrate is high, gets the water rate high, can save the plurality of advantages such as the water yield and power consumption.

The utility model treating apparatus is linked to be an integral body with tube settling district and filtering area, after in processed water, adding a certain amount of coagulant (such as aluminum sulfate), just formed the secondary flocculation, namely first in the flocculation of tube settling district once, then carry out the flocculation second time at filtering area, after this technology is carried out water treatment as the advanced treating measure, make the stability that lowers water pollutant, construct large flco and assemble pollutant in the water, make small particle be gathered into the bulky grain thing, increase the particle particle diameter, thereby improve the treatment effect of subsequent technique (precipitation and filtration).

The utility model has creatively proposed the microdilatancy filtration theory, and has formed key technology.The tradition upward flow filtering equipment, because be subjected to the water yield and flow rate effect, filtrate is in the pulse alternating state of expansion, compression.Fluidized state is unstable, so that the space between filtrate is suddenly big or suddenly small, causes pollutant more easily to penetrate filter material layer, causes outlet effect unstable, the shortcoming that effluent quality is poor.And in actual use, because the fluctuation of amount of inlet water causes this pulse condition of water currents that is subjected to be difficult to solve, and then causes the technological deficiency of traditional upward flow.The utility model has adopted two kinds of calculating of water distribution uniformity and filtrate pressing plate counterweight to stablize the filtrate swelling state.(1) uses the pore water distribution uniformity technology of narrating previously, water distribution uniformity is carried out in water inlet, improve flow stability.(2) for density and the average amount of inlet water of filtrate, the weight that calculates the counterweight pressing plate reduces the impact that filtrate is subjected to current, makes filtrate remain at the microdilatancy state, only keeps slight void between filtrate and filtrate, to improve effluent quality.(3) water inlet hydrous water adjustable valve is stablized amount of inlet water (constant flow rate water inlet), further stablizes the microdilatancy state of filtrate.

The utility model has creatively proposed to arrange the filtration water distributing area between tube settling district and filtering area, thereby formed tube settling and upward flow filtration associating backwashing technology, technology two aspect are used, both can the backwash filtrates, also can clear up the deposition in the deposition sloped tube.Not only realize the good treatment effect in filter tank, and remedied the drawback of traditional Inclined-tube Settling Technology, realized the breakthrough that tube settling can be used backwashing technology, also realized the breakthrough of backwashing technology simultaneously.Use the backwash effect that gas rushes, carbonated drink is united recoil, water is brought raising tube settling district, filtering area, the life cycle that prolongs filtrate.Traditional tube settling generally is the purpose that reaches spoil disposal by sedimentary natural sedimentation, usually can cause the deposition phenomenon of inclined tube, affects sedimentation effect, causes it can not process high algae and sewage.And the utility model has been used and is put douching technique and avoided this drawback, the carbonated drink recoil can be removed each pollutant in the inclined tube effectively, adopt backwashing system to come the heavy mud in scavenger precipitation district, guarantee the sedimentation effect of settling zone, avoided traditional tube settler can not process the drawback of high algae and sewage.In addition, gas punching, water punching, air water rush respond well, can improve the developing result of filtrate, thereby reach filtrate desorption effect, improve the operational effect of device.

The utility model integrates upward flow tube settling, pore water distribution uniformity, upward flow filtration, secondary flocculation, microdilatancy filtration and tube settling and upward flow filtration associating backwash, carry out organic combination, thereby formed a kind of new one body swimming of the present utility model and processed treating apparatus, at home and abroad all do not report, novelty is obvious.

The utility model makes up with the form of assembly, wherein filtration fraction has adopted the constructing plan that filtrate separates with filter by the mode of whole filtrate filling box fixed placement, and adopt the concept of whole filtrate to make up filtering bodies, filtering bodies and filter are installed and are combined, when the filtrate in the filtering bodies is undesirable, only need its overall pulling down replacing is got final product, as adopting the quartz sand filtration body to process in the water turbidity as main user, can adopt active carbon or polymeric adsorbent filtering bodies to process in the water organic matter as main user, hardness can adopt the soften resin filtering bodies as main user in the demineralized water.This has satisfied the demand of different user so that this device is easy to use.

The structure form of setting up changes traditional civil engineering and builds present situation, no longer is a huge monster so that filter.Being made into numerous small-scale filtration with the PVC material sets up.The owner only needs the size according to self water yield, calculates establishment quantity, and buys enough establishments according to setting up quantity, interconnects and can use by flexible pipe.This pattern has not only satisfied little water yield user's demand, and shortened the big yield user construction period, post processing plant area is installed uniform, elegant in appearance.The utility model has been equipped with instrument and meter for automation and watch-dog, is convenient to user's centralized Control, improves operational efficiency.

Beneficial effect

For drinking water treatment; the former water that raw water turbidity is lower (common turbidity＜100NTU); the tradition sedimentation effect is also not obvious; thereby more water factory can adopt little flocculation; add the mode of directly filtering behind the coagulant; the filtration meeting of this shortage precipitation is dwindled filter cycle so that filter loading increases.The water distribution manner of tube settling formula has kept the function that precipitates, and reduction bulky grain pollutant has guaranteed again the water distribution uniformity of upward flow filtration to the impact in filter cycle.

Expansion rate is controlled at 2 ~ 5%, belongs to the microdilatancy state, and the space between the sand grains is less, has both guaranteed the filter effect of holding back of upward flow, has reduced again the loss of flood peak that traditional gravity current filters, thereby has reduced corresponding energy consumption.Compare with the filtration of traditional upward flow, effluent quality is filtered in microdilatancy can improve about 50% (with the turbidity meterings), and can reduce by the water head loss by filtration of 2 ~ 3m by force of gravity stream with traditional gravity current microdilatancy upward flow, thereby be a kind of splendid method of operation.

The backwash water inlet pipe is arranged between tube settling district and the filtering area, and the switching by valve reaches both backwashes.Can adopt the pattern of gas punching-combined water and air backwash-water punching to wash filtrate and precipitation zone inclined tube in the backwash process, effect can effectively be guaranteed.Tube settling with backwash, the effective inclined tube of dredge blockage, economical and effective can effectively remedy the tube settling defective, can change the traditional mode that tube settling can not be removed high algae water.

The filtrate pressing plate of precipitation zone can be controlled the swelling state of filtrate well, so that filtrate is stressed on same level, has reached the purpose in even control filtrate space.

Filter is comparatively flexible, and amount of inlet water, intake pressure and inner stuffing can be adjusted according to demand, can carry out function adjustment according to requirement of engineering, to satisfy need of production.

Description of drawings

Fig. 1 tradition upward flow filtration filtrate swelling state and streamflow regime.

Filtrate swelling state and streamflow regime under Fig. 2 microdilatancy state.

The whole filter structure schematic diagram of Fig. 3.

Fig. 4 the utility model water treatment facilities structural representation;

Fig. 5 equilibrium pressure plate structure schematic diagram.Be the pressing plate of filtrate, be used for stablize the filtrate expansion and be stressed and go out water balance;

Fig. 6 tube settling district A-A profile;

Figure is used in the assembling of Fig. 7 device.

Wherein: 1, tube settling district, 11, inclined tube, 111, the inclined tube water inlet end, 2, filtering area, 21, filtrate, 22, filtrate balance pressing plate, 23, whole filtrate fills box, 24, the filtering area shell, 25, filtrate supports, and 26, handle, 3, filter water distributing area, 31, cleaning and backwash water inlet pipe, 32, backwash water distribution panel, 4, the precipitation sludge discharging area, 41, sludge bucket, 42, discharge pipeline, 5, exhalant region, 51, outlet pipe, 52, collect the termination, 6, device water inlet pipe, 7, pipeline static mixer, 8, be filtered water, 9, filter water outlet.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is implemented to be described further, integral type upward flow water treatment facilities, comprise tube settling district 1, filtering area 2 and exhalant region 5, tube settling district 1 is arranged on filtering area 2 lower ends, sets out pool 5 in the upper end of filtering area 2, is provided with precipitation sludge discharging area 4 in the lower end in tube settling district 1,4 are provided with device water inlet pipe 6 in the precipitation sludge discharging area, the inclined tube water inlet end 111 in the corresponding tube settling district, water side 1 of device water inlet pipe 6; Be provided with filtrate 21 at filtering area 2; Between tube settling district 1 and filtering area 2, also be provided with and filter water distributing area 3, be provided with at filtration water distributing area 3 and clean and backwash water inlet pipe 31; Be provided with outlet pipe 51 at exhalant region 5.Inclined tube 11 in the tube settling district 1 is evenly arranged, and its profile as shown in Figure 6.

Processed water is before access to plant water inlet pipe 6, can drop into corresponding coagulant according to the water quality situation, coagulant mixes (Fig. 4) by the pipeline static mixer 7 that is equipped with, enter from device water inlet pipe 6 subsequently, carry out precipitation process through tube settling district 1, the heavy mud that precipitates is discharged by discharge pipeline 42, and the current after the precipitation filter through filtrate 21, and then discharges from outlet pipe 51.During backwash, shutoff device water inlet pipe 6 and discharge pipeline 42 valves are opened outlet pipe 51 valves, and from cleaning and backwash water inlet pipe 31 passes into clear water, compressed air carries out the backwash of filtrate, clear water is discharged from outlet pipe 51 after cleaning filtrate.In addition when the settling zone dirt is stifled serious, can close outlet pipe 51 and device water inlet pipe 6, open discharge pipeline 42 valves, open outlet pipe 51 valves, from cleaning and backwash water inlet pipe 31 passes into clear water, compressed air and carries out filtrate, from cleaning and backwash water inlet pipe 31 passes into clear water, compressed air carries out the backwash of precipitation zone, clear water is discharged from discharge pipeline 42 after cleaning the tube settling district, thereby reaches the cleaning of settling zone.

Filtrate can be taked the mode of whole filtrate, structure chart as shown in Figure 3, support 25 at two filtrates of filtering area shell 24 interior processing, then filtrate 21 being filled in whole filtrate fills in the box, and at filtrate filling box 23 upper ends connection handle 26, by handle 26 filtrate is filled box 23 and be placed in the filtrate support 25.When needing to change filtrate, only need to finish by carrying handle the replacing of filtrate.

Pressing plate is all different according to the different weight that are equipped with of filtrate density, mainly limits the degrees of expansion of filtrate according to flow of inlet water, pressure, makes filtrate remain at the microdilatancy state, to improve effluent quality.

(1) application case 1

Filtering area is inserted the whole filtrate of quartz sand, carry out drinking water conventional treatment means, precipitation and the perfection set of filtering, can greatly reduce the floor space of water factory, the backwash means of optimizing, solved tube settling and can't process the drawback of high algae water, this device also can be used as the preliminary treatment of milipore filter, as security personnel's filtration facility of milipore filter.In addition, whole filtrate technology can reduce the replacing workload of filtrate greatly, increases work efficiency.

(2) application case 2

Filtering area is inserted active carbon, be connected on after the conventional treatment process, use as advanced treatment process, to remove the organic pollution in the water, reduce the growing amount of follow-up DBPs.

(3) application case 3

Filtering area is inserted the whole filtrate of polymeric adsorbent, be placed in the residential quarter on the water Recycling Project.The biotope land used is comparatively nervous, and conventional coagulating sedimentation, filtration facility floor space are larger, and management is inconvenience comparatively, simultaneously in the residential quarter water reuse water quality requirement not as drinking water.Adopt the plastic pellet filtrate, can improve filtering rate, reduce device quantity, reduce floor space, to realize effect.This device is more easily realized automatic operating simultaneously, than manageability and maintenance, and water Treatment for Reuse in comparatively suitable shortage water treatment professional's the residential quarter.

(4) application case 4

Filtering area is inserted quartz sand or the whole filtrate of polymeric adsorbent, as the on-the-spot sewage treatment facility of engineering construction project.The sewage disposal at engineering construction scene is a difficult problem of China's waste water control always; because the conversion of project place is frequent; fixing sewage treatment facility certainly will be infeasible; and this device can be with tearing open with walking; treatment effect is good; management maintenance can be realized automation, and national ecological environment is protected in the sewage disposal of comparatively suitable building site.

(5) application case 5

Carry the mark reforming equipment as taking up an area nervous sewage treatment plant, behind the access traditional secondary sedimentation basin, cooperate coagulant, further remove TP, SS in the sewage and microorganism etc.

Claims (5)

1. integral type upward flow water treatment facilities, it is characterized in that: comprise tube settling district, filtering area and exhalant region, described tube settling district is arranged on the filtering area lower end, in the upper end of filtering area described exhalant region is set, lower end in described tube settling district is provided with the precipitation sludge discharging area, in the precipitation sludge discharging area, be provided with the device water inlet pipe, the inclined tube water inlet end in the corresponding described tube settling in the water side of described device water inlet pipe district; Be provided with filtrate at described filtering area; Between described tube settling district and filtering area, also be provided with the filtration water distributing area, be provided with at the filtration water distributing area and clean and the backwash water inlet pipe; The outlet pipe that is provided with at described exhalant region.

2. integral type upward flow water treatment facilities according to claim 1, it is characterized in that: described inclined tube is evenly arranged.

3. integral type upward flow water treatment facilities according to claim 1 is characterized in that: be provided with backwash water distribution panel above the cleaning of described filtration water distributing area and backwash water inlet pipe.

4. according to claim 1,2 or 3 described integral type upward flow water treatment facilities, it is characterized in that: also be provided with a filtrate balance pressing plate, the density p of pressing plate in described filtering area filtrate upper end _pFor:

Wherein, m _pThe porosity of-pressing plate (producer provides), m _sPorosity under the-filtrate unswollen state (2 ~ 5%); ρ ₀The density of-water, ρ _s-filtrate density, g/cm ³L _pThe thickness of-pressing plate, L _sThickness under the-filtering layer swelling state, cm; d _s-the sphere diameter identical with the filtering material particle volume, cm; Ф-filtering material particle sphericity coefficient; The expansion rate of e-filtrate, %; The dynamic viscosity of μ-water, pa.s.

5. according to claim 1,2 or 3 described integral type upward flow water treatment facilities, it is characterized in that: be provided with whole filtrate at described filtering area and fill box, in whole filtrate is filled box, be filled with whole filtrate.

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