CN1098659A - Apparatus for clarifying suspension - Google Patents
Apparatus for clarifying suspension Download PDFInfo
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- CN1098659A CN1098659A CN 93109484 CN93109484A CN1098659A CN 1098659 A CN1098659 A CN 1098659A CN 93109484 CN93109484 CN 93109484 CN 93109484 A CN93109484 A CN 93109484A CN 1098659 A CN1098659 A CN 1098659A
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Abstract
The invention provides a kind of apparatus for clarifying suspension.This device is a cell body, be located at the middle stoste supply part of cell body cell body is divided into top and the bottom, top as filter house, bottom as coagulative precipitation portion, the filtering layer that has granular come-up filtrate to constitute in the cell body, in filter house, dispose the open cylindrical body in upper and lower end face, in cylindrical body, be provided with stirring, the parts that pump up water, be provided with the playpipe that is used to remove attached to mud on its wall in the coagulative precipitation portion.
Description
The present invention relates to use the apparatus for clarifying suspension of granular come-up filtrate, be provided with the playpipe that is used to remove attached to mud on filtrate back washing mechanism and the device inwall in this device.
Japanese patent gazette shown in Figure 4 has disclosed a kind of such device special public clear 51-60675 number.This device is made of cell body 51, by being located at the stoste supply part 52 at cell body middle part, the cell body upper and lower is formed filter house B and the A of coagulative precipitation portion respectively.There is filtrate to discharge parts 70 in the upper end of filter house B,, is provided with the filtering layer 60 that constitutes by granular come-up filtrate on the top of filter house.In filter house, disposing the open cylindrical body 62 of upper and lower side, filtering layer below and stoste supply part 52 tops when this cylindrical body 62 is positioned at the operation of suspension clarifying treatment.Be provided with in this cylindrical body 62 and having the upwards air supply pipe 65 of spray-hole.Also be provided with the positioning element 67,68 that 62 the upper end that makes water level in the cell body reduce, make cylindrical body is positioned at the filtering layer 60 of filtering layer inside in this device when back washing is operated.With the A of coagulative precipitation portion in stoste supply part 52 supply ports join or the close positions place is disposing flocculate and forms parts 57, connecting mud in coagulative precipitation portion A lower end and discharging parts 59.Above-mentioned structure is the feature of this device.
This device makes the trough inner water potential drop low when back washing is operated, and filtering layer is descended, and makes the upper end of cylindrical body be positioned at filtering layer inside.Then, air is sprayed onto filtrate in the cylindrical body from spray-hole upwards on, by the air effect of increasing, filtrate is flowed launches, thereby clean filtrate.
, the long-term use floated filtrate and cleaned filtrate repeatedly, can make the filtering material particle surface contamination, adheres to outstanding absurd creature matter gradually easily.When the outstanding absurd creature of more amount attached to filtrate on the time, its weight increases, the result sedimentation filtering material particle occurs from the come-up filter material layer.This phenomenon is easy to generate during near 1 left and right sides at the proportion of come-up filtrate.The general outstanding absurd creature that produces in the wastewater treatment process, for example use proportion be 0.7 come-up filtrate after 2-3 month, the 30-60% sedimentation of filtrate consumes.And, when the filtrate of sedimentation is discharged with mud, cause the fault of discharge pipeline or pump sometimes.
In order to prevent the sedimentation consumption of above-mentioned come-up filtrate, can adopt the little filtrate of proportion.But, the proportion hour of come-up filtrate, the mobile expansion of the filtrate in the above-mentioned back washing mechanism of in the past installing the hollow air-flow can not be satisfactory, thus the cleaning of filtrate is very difficult.Adopt the filter that is disclosed with the above-mentioned special public clear 53-26861 communique that installed same back washing mechanism in the past also to have same problem.
In above-mentioned treating apparatus, if continue filter operation for a long time, then in the A of coagulative precipitation portion, the flocculate of cohesion adheres to gradually, is deposited on the inclined wall of cell body bottom, sedimentary mud district band rises, the result, and the precipitate and separate of the A of coagulative precipitation portion can not be carried out.Like this, make whole flocculates rely on the filtration of come-up filtrates, and processing when can not realize precipitating and filtering.Before this, must circulate by the decision spoil disposal, remove the mud that is deposited in the cell body bottom termly., its accumulating amount of the mud of this accumulation increases more, and packing is high more, and mud becomes concentrated closely knit mud, the mobile minimizing.
Its result, the closely knit mud that adheres to, is deposited on the cell body bottom angled face is not easy to discharge, and the mud of good fluidity retains a large amount of closely knit mud on cell body bottom angled face behind spoil disposal.This closely knit mud can not be discharged.
After so incomplete spoil disposal operation, when carrying out filter operation again, spoil disposal becomes extremely short circulation timei, and it filters and also shortens the duration of runs, therefore, must remove attachment removal termly and be deposited in mud on the cell body bottom wall.
Device of the present invention improves, even use the little granular come-up filtrate of proportion also can implement to clean with feeling quite pleased.In the device of the present invention, propeller type stirring vane for example is set in the inside of cylindrical body 62 replaces air supply pipe 65 in the above-mentioned device in the past, by its action the liquid in the cylindrical body is stirred, pumps up water, and realize its purpose.
In apparatus of the present invention, coagulative precipitation portion wall in the cell body bottom is provided with playpipe, remove attached to the mud on the wall with this playpipe, therefore the advantage that has following three aspects: (1) is because when each spoil disposal, utilize the jet of playpipe ejection to clean attached to the mud on the cell body bottom precipitation portion wall, so mud can not adhere to, be deposited on the wall.(2) mud that anchors at wall or bottom is disengaged, and can carry out above-mentioned mud emission effectively.(3) injection stream forms by mud circulation, need not rinse water, and the concentration of hydraulic mixture in the spoil disposal is even.
The feature of the outstanding turbid apparatus for clarifying of the present invention is: its by (a) by its top being formed filter house at the stoste supply part of central portion setting, its underpart is formed the cell body of coagulative precipitation portion, (b) filtering layer that constitutes by granular come-up filtrate, (c) cylindrical body that the both ends of the surface up and down that are provided with in above-mentioned filter house are open, this cylindrical body is configured on the top position of the below of suspension clarifying treatment above-mentioned filtering layer of when operation and stoste feed fluid and (d) is configured in stirring in this cylindrical body, the stirring that the liquid that pumps up water is used, the parts that pump up water are formed, in above-mentioned coagulative precipitation portion, be provided with the playpipe that is used to remove attached to the mud on its wall.
With reference to the accompanying drawings, embodiments of the invention are described, wherein,
Fig. 1 is the front cross-sectional view that apparatus for clarifying suspension of the present invention roughly is described.
Fig. 2 is the key diagram that treating apparatus of the present invention shown in Figure 1 bottom mud gathering portion is described in detail;
Fig. 3 is the mud gathering shown in Figure 2 portion skeleton diagram of seeing from the below;
Fig. 4 is the orthogonal view that apparatus for clarifying suspension in the past roughly is described.
Below, say an embodiment who describes bright apparatus of the present invention in detail with reference to Fig. 1.The inside of cell body 1 separates from the centre, and the bottom is the A of coagulative precipitation portion, and top is filter house B.The bottom of the A of coagulative precipitation portion is told the mud gathering C of portion again.This cell body 1 can be a hermetic type, also can be opening.Its section configuration can be a suitable shape such as circle, polygon.Middle part in the cell body 1 of distinguishing coagulative precipitation A of portion and filter house B is disposing stoste supply pipe 2, and pipe 2 joins by valve 3 and water flowing pump 4.The way connects the pipe 6 have valve 5 therein, is used for supplying with the assistant of polymer coagulant etc.On this pipe 6, be connected with flocculating agent injection pump 10.On the supply port of stoste supply pipe 2 in cell body 1, connecting flocculate and forming parts 7.Stoste enters tangential direction toward the inflow that flocculate forms parts 7, is located at inner barrier (figure does not show) and has mixing effect, is subjected to then uniformly being discharged to the A of coagulative precipitation portion down to the stream effect.In the present embodiment, use club as barrier.But, in this part,, therefore, can use various known balk boards, hang plate etc. as long as processed liquid mixes with assistant.At interval flocculate forms the part of cell body 1 around the parts 7, the overcurrent that mud disperses when preventing adverse current is being set is preventing that plate 8(from for example forming some plates that certain width is arranged that outer circumferential cell body 1 inboard of parts 7 is radial assortment from flocculate).In the lower end of the A of coagulative precipitation portion is at the end of cell body 1, is connecting the blow-off pipe 41 that has valve 9.The distance of the height of the deduction mud gathering C of portion from the height of this device coagulative precipitation A of portion promptly forms the distance of upper end, rounding tapering to the figure, parts 7 lower ends from flocculate, preferably be equal to or greater than the diameter of cell body 1.In addition, as shown in the figure, the mud gathering C of portion has certain angle from its upper end to the lower end, makes that like this collection mud and the densification of the solid content be deposited to bottom land are easier.Its inclination angle with respect to the horizontal plane is generally 60 °, but this angle can be done suitable change according to sludge quality.
On the top of filter house B, be provided with filtering layer 11 and support plate 12, filtering layer 11 is made of the granular come-up filtrate (as polyethylene) of proportion less than stoste, and the space that prevents that filtrate from flowing out is arranged on the support plate.In filter house B, disposing cylindrical body 13, this cylindrical body 13 is arranged on the position of below, suspension clarifying treatment when operation filtering layer 11 positions (position shown in the figure solid line) and stoste supply pipe 2 tops, this cylindrical body about in the of 13 both ends of the surface be open, can be circle or polygon.Its number is not limited to 1, can be for more than 2.The area of section of cylindrical body 13 is preferably the 1/10-1/2 of cell body area of section, and its 1.2-2 that highly is preferably filtering layer 11 thickness doubly.Cylindrical body 13 allocation position on the above-below direction in filter house B can suitably be selected under above-mentioned qualifications.Have shown in the diagram in the constructing apparatus, cylindrical body 13 and flocculate form parts 7 skies and open certain intervals ground and be positioned at the top, and its position is preferably selected like this: i.e. during back washing, do not touch flocculate formation parts 7 from cylindrical body 13 filtrate that launches that flows downwards.
Be provided with the mixer 14 of band propeller type stirring vane in the inside of cylindrical body 13.This mixer stirs liquid in the cylindrical body 13, and pumps up water, and the liquid that will pump up water is fed to around the cylindrical body 13 place portions.Have this cylindrical body 13 and stir in apparatus of the present invention of the parts 14 that pump up water, also be provided with the parts that the upper end that makes filtering layer 11 descend, make cylindrical body 13 is positioned at filtering layer 11 inside when back washing.Specifically, be drainpipe 16 and the siphon cutout 17 thereof that is provided with band valve 15 at the central portion of cell body 1.Because these parts, if the water level in the cell body 1 reduces, filtering layer 11 also descends, and stops on the dotted line position shown in the figure.At this moment the upper end of cylindrical body 13 preferably is positioned at filtering layer 11 inner 0-20CM scopes.The upper end of filter house B is overfall 18 and the pipe 19 that the upper end of cell body 1 is provided with filtrate.In addition, also connecting the back washing water supplying pipe 21 that has back washing water inlet valve 20, this pipe 21 links to each other with drainpipe 16 by having the bypass pipe 23 that extrudes water out valve 22.25 expression back washpumps, the rotary driving source of 24 expression mixers 14.
Fig. 2 is the key diagram of the mud gathering C of portion of explanation expression treating apparatus of the present invention.On the mud gathering C of portion, disposing playpipe 30, utilize jet flow to remove attached to the mud on the C of the gathering portion wall.In illustrated example, pipe 30 is the branches that are configured in the mud gathering C of portion outer wall ring-type circulation pipe 35 on every side.In its way, be provided with valve 32.The front end that has the pipe 30 of jet 31 is projected in the cell body from upper inside wall and the centre of the mud gathering C of portion.Circulation pipe 35 is communicated with blow-off pipe 41 by mud circulating valve 36.
The diameter of pipe 30 is not particularly limited, and is generally 25-40mm, is preferably 25A(25mm).Pipe 30 allocation position is not particularly limited the position into as shown in the figure.In illustrated example, pipe 30 is configured to two rows, but also can only dispose 1 row, or more than 3 rows.
The ejection angle of the jet 31 of pipe 30 is 35 °-55 ° with respect to vertical plane, is preferably 45 °.Vortex-like flowing downwards can be obtained on wall, being like this, mud can be removed effectively.
The number of jet 31 is along equally spaced 8 (see figure 3)s of perisporium in the mud gathering C of portion upper inside wall, at pars intermedia, is along perisporium equally spaced 4.But this only is an embodiment, and preferably the Substance Properties that maybe will remove according to treatment fluid is carried out suitable selection.
The opening shape of jet is to make above-mentioned 25A pipe be flat in the present embodiment, and the peace and quiet water flow velocity that makes its outflow is 2.5m/ second.Specifically, can make the roughly rounded shape of 9mm * 30mm.
The blow-off pipe 41 that is connected the mud gathering C of portion below is connected with sludge pump 40 by valve 9.The capacity of pump 40 for example is 30m
3/ time.Connecting discharge pipeline 41 on the sludge pump 40, arriving spoil disposal inspissator (figure does not show) by mud valve 42.Above-mentioned circulation pipe 35 is connected on the discharge pipeline 41 by valve 36.
Below, the operation for the treatment of apparatus of the present invention is described.
Only open earlier former inlet valve 3, supply with stoste from water flowing pump 4.By managing 2 stoste supplied with in the way of cell body 1, from managing 6 assistants (polymer coagulant etc.) of supplying with necessary amounts, form and mix stoste by flocculating agent injection pump 10.This mixing stoste forms parts 7 through managing 2 flocculates that flow into the central interior that is positioned at cell body 1.Flow into flocculate form parts 7 mixing stoste since above-mentioned tangent line flow into the mixing effect of the eddy flow that produces and barrier and impelled cohesion.Like this, the flocculate chap of formation is big, is subjected to down jointly to the effect of flowing with liquid, forms parts 7 from flocculate and discharges toward the A of coagulative precipitation portion.The outstanding absurd creature matter of discharging in the liquid is assembled toward the mud gathering C of portion because of the gravitational settling effect, thereby liquid is able to turbidity removal.The mud of assembling is discharged gradually from blow-off pipe 41.Like this, most of absurd creature has just been removed from liquid.But the liquid that contains the outstanding absurd creature matter of not sedimentation rises, and arrives the filtering layer 11 that is formed by the come-up filtrate.Remaining outstanding absurd creature matter is filtered fully at filtering layer 11, and liquid is clarified.Filtrate after the clarification is discharged to the outside from overfall 18 through managing 19, utilizes as required again or emits.In addition, also can deliver to the playpipe 30 of the above-mentioned mud gathering C of portion, use as the injection stream of removing attached to the mud on the wall.
Continue above-mentioned operation, carry out the filtration of material, as the pressure reduction that produces expression filtering layer 11 blocked states (1.0-1.5kg/cm for example by filtering layer 11
2) time, carry out the back washing operation of the filtering layer 11 of this device.
Stop the supply of stoste earlier, close former water inlet valve 3.Then open draining valve 15, filtering layer 11 is descended.In a single day filtering layer 11 drops to dotted line position among the figure, and then air flows into the decline of the reduction of stopping water level and filtering layer 11 from siphon cutout 17.Like this, above filtering layer 11, filtering layer 11 flows and launches necessary space when forming back washing.Then, make mixer 14 rotations with drive source, because stirring, the effect of pumping up water of mixer 14, the filtering material particle that is positioned at the filtering layer 11 of cylindrical shell 13 inside at first separates, spreads.This separation, expand to whole filtering layer 11, last, as shown in the figure, the liquid of filtering material particle in cell body 1 passes the inside and outside of cylindrical shell 13 and flows, the fierceness that causes filtering layer 11 expansion of flowing.The shearing and the impact that produce owing to the collision between filtrate, make anchor at that filter dregs on the filtrate separates contentedly, joins mutually, cohesion, thickization, accumulate in bottom land as sediment., open back washing water inlet valve 20 therebetween, supply with from back washpump 25 back washing water from cell body 1 upper end.
After carrying out the back washing operation of appropriate time (about 5-10 minute), stop the running of mixer 14, leave standstill appropriate time (about 10 minutes).Open draining valve 15 then, close back washing water inlet valve 20, open former water inlet valve 3 running water flowing pumps 14, supply with stoste.Filtering layer 11 arrives support plate 12 owing to liquid level in the cell body rises, and flows out liquid before being fixed at filtering layer 11, stablizing and contains outstanding absurd creature matter, returns former liquid bath (figure does not show) so open valve 22.Afterwards, filtering layer 11 settles out, and when the filtrate that can obtain clarifying, shut off valve 22 carries out above-mentioned clarification operation.
The mud gathering portion C for the treatment of apparatus of the present invention below cell body has mud to discharge parts.This mechanism below is described.
After continuing to handle with apparatus for clarifying suspension, mud just is deposited in the inwall of the mud gathering C of portion as shown in Figure 2.If let alone to pile up and don't deal with, then can bring following problems: the coagulative precipitation of (1) groove bottom can not normally be carried out, because the obstruction of filtrate, the number of times that back washing is reclaimed increases, and can not carry out stable treated.(2) because adhere to, accumulation, mud, can not clean coagulative precipitation portion.Therefore, this mud must be removed.In Fig. 2, the discharge of mud is undertaken by blow-off pipe 4, at this moment, carries out the mud circulation by the injection stream of playpipe 30.Like this, the sludge removal of piling up is got off and discharge easily.
Open the valve 32 of playpipe 30 earlier, for example eject flow velocity and be about the 2.5mm/ injection stream of second.About the adjustment of flow velocity, be that the adjustment by managing 30 jet 31 or the operation of valve 32 are carried out as previously mentioned.The injection stream ejection was beaten in valve 9 and 42 after about 1-5 minute, began to discharge mud from blow-off pipe 42.At this moment can stop to manage 30 flowing water, also flowing water spoil disposal on one side on one side.Can utilize sludge pump 40 to carry out spoil disposal, the pump of a spoil disposal about 1-10 actuation time minute.
It is to carry out in the water flowing discontinuous of treatment fluid that such mud is discharged, and it is not particularly limited at interval in the present invention, is generally 30-60 minute.And the back washing operation that is preferably in above-mentioned filtrate is also carried out before.
Table 1 also carries out the example operation that mud is discharged before being illustrated in the back washing operation.
In the table 1, represent valve of opening in each operation and each parts such as pump that moving with the whippletree line.
In common water flowing operation, make regularly earthquake at intermittence work of mud circulating valve 36, mud valve 42 and sludge pump 40, carry out spoil disposal at a certain time interval.When producing expression filtering layer pressure reduction (as 1.0-1.5kg/cm
2), carry out above-mentioned back washing operation.This operation is the recovery process of table 1.Recovery process is discharged operation, drainage procedure, agitating procedure, back washing operation, leaves standstill operation, is extruded operation and form by mud circulating process, mud.
Common water flowing is carried out in water pump 4 action in the mud circulating process, opens mud circulating valve 36, uses from the jet flow of the ejection of playpipe 30 and makes the mud circulation.Make sludge pump 40 actions carry out spoil disposal.From this operation Halfway Stopping water flowing pump, only carry out the circulation of mud.
Discharge in the operation at ensuing mud, open mud valve 42, make sludge pump 40 actions, from blow-off pipe 41 spoil disposals.Behind drainage procedure and above-mentioned agitating procedure, carry out the back washing operation then.In the back washing operation, open draining valve 15 and back washing water inlet valve 20, mixer 14 and back washpump 25 actions.
After the back washing operation, before the operation that extrudes, leave standstill operation.This is for filtering layer precipitation stable and coagulative precipitation portion being clarified, the extrusion time being shortened.In leaving standstill operation, all valves all cut out, and all wiper mechanisms all stop.
Recovery process be to extrude operation at last.This operation is the operation of cleaning filtering layer in advance before next water flowing operation.Open former water inlet valve 3 and extrude water out valve 22, water flowing pump 4 and 10 actions of flocculating agent injection pump.For caution's sake, each mud of discharging precipitation is opened mud circulating valve 36 and mud valve 42 provisionally at this operation initial stage, sludge pump 40 actions.
When carrying out spoil disposal in treatment fluid feeding water, spoil disposal speed is consistent with the treatment fluid feed speed, and for example working as the treatment fluid feed speed is 30m
3/ constantly, spoil disposal speed also is 30m
3/ time.The control of spoil disposal time can be adopted timer, also can manually control.
As mentioned above, carry out suitable spoil disposal and can obtain following effect in stoste processing operation: the coagulative precipitation of (1) groove bottom can normally be carried out, and the mud on the groove bottom coagulative precipitation wall is piled up and reduced.(2) contamination and plugging of filtrate reduces, and can stably handle.
In order to constitute the apparatus of the present invention that form and to compare by above with device in the past shown in Figure 4, adopted the filtering layer of high 60cm, diameter 100cm, handle with the stoste of SS concentration 200ppm, its result is as shown in table 2.
In the table 2, the spoil disposal rate is meant in the mud that accumulates in the mud gathering C of portion, the ratio of the mud of discharging from mud discharging mouth.As known from Table 2, use device of the present invention, can expansion when back washing is operated so that filtrate flows more intensely.Therefore, even use the little filtrate of proportion, its back washing efficient also is well, the back washing effect that so just obtains.Therefore the clarifying treatment time after back washing is reclaimed also prolongs, and can reduce the consumption of filtrate.
As mentioned above, device of the present invention is characterised in that the back washing mechanism aspect of filtering layer.So, resemble the filter that the public clear 53-26861 communique of above-mentioned spy discloses, only in the device of filtration as object with stoste, the device with this back washing mechanism is also contained in the scope of the present invention.
Claims (7)
1, a kind of apparatus for clarifying suspension is characterized in that, by:
(a) by the stoste supply part in the middle of being located at top as filter house with the cell body of bottom as coagulative precipitation portion;
(b) filtering layer that constitutes by granular come-up filtrate;
The cylindrical body that the both ends of the surface up and down that dispose on below the above-mentioned filtering layer position and stoste supply part top position when (c) the suspension clarifying treatment in the above-mentioned filter house is operated are open;
(d) be configured in the stirring in the above-mentioned cylindrical body, the liquid that pumps up water stirring, parts pump up water;
Form, in above-mentioned coagulative precipitation portion, be provided with the playpipe that is used to remove attached to mud on its wall.
2, the apparatus for clarifying suspension of putting down in writing as claim 1 is characterized in that, the jet of playpipe is with respect to vertical plane angle at 45.
As claim 1 or 2 apparatus for clarifying suspension of being put down in writing, it is characterized in that 3, above-mentioned playpipe is configured on the above-mentioned coagulative precipitation portion internal perisporium equally spacedly.
4, the apparatus for clarifying suspension of putting down in writing as claim 3 is characterized in that, above-mentioned playpipe forms 2 rows up and down.
As any apparatus for clarifying suspension of putting down in writing in the claim 1,2,3 or 4, it is characterized in that 5, the proportion of above-mentioned granular come-up filtrate is 0.1-0.8.
As any apparatus for clarifying suspension of putting down in writing in the claim 1,2,3,4 or 5, it is characterized in that 6, above-mentioned stirring, the parts that pump up water are the mixers with propeller type stirring vane.
7, as any apparatus for clarifying suspension of putting down in writing in the claim 1,2,3,4,5 or 6, it is characterized in that, also comprise:
The filtrate that is configured in above-mentioned filter house upper end is discharged parts;
When back washing is operated, reduce water level in the cell body, make the upper end of above-mentioned cylindrical body be positioned at the parts of above-mentioned filtering layer inside;
Be configured in that near the flocculate the stoste supply part supply port forms parts in the above-mentioned coagulative precipitation portion;
The mud that is configured in above-mentioned coagulative precipitation subordinate end is discharged parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109484 CN1098659A (en) | 1993-08-11 | 1993-08-11 | Apparatus for clarifying suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109484 CN1098659A (en) | 1993-08-11 | 1993-08-11 | Apparatus for clarifying suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1098659A true CN1098659A (en) | 1995-02-15 |
Family
ID=4987641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93109484 Pending CN1098659A (en) | 1993-08-11 | 1993-08-11 | Apparatus for clarifying suspension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1098659A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100548429C (en) * | 2007-04-20 | 2009-10-14 | 宜兴市亿达工业成套设备有限公司 | A kind of filter |
| CN103223268A (en) * | 2012-04-03 | 2013-07-31 | 大金吉欧威株式会社 | Air whirl sendimentation device |
| CN103341286A (en) * | 2013-07-29 | 2013-10-09 | 农业部沼气科学研究所 | Degradable filter material biogas slurry filter and filtering method thereof |
| CN107226544A (en) * | 2017-07-05 | 2017-10-03 | 合肥天翔环境工程有限公司 | Sewage-treatment plant |
-
1993
- 1993-08-11 CN CN 93109484 patent/CN1098659A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100548429C (en) * | 2007-04-20 | 2009-10-14 | 宜兴市亿达工业成套设备有限公司 | A kind of filter |
| CN103223268A (en) * | 2012-04-03 | 2013-07-31 | 大金吉欧威株式会社 | Air whirl sendimentation device |
| CN103223268B (en) * | 2012-04-03 | 2016-03-16 | 大金吉欧威株式会社 | Air whirl sendimentation device |
| CN103341286A (en) * | 2013-07-29 | 2013-10-09 | 农业部沼气科学研究所 | Degradable filter material biogas slurry filter and filtering method thereof |
| CN103341286B (en) * | 2013-07-29 | 2015-09-23 | 农业部沼气科学研究所 | Degradable filtrate marsh liquid filter and filter method thereof |
| CN107226544A (en) * | 2017-07-05 | 2017-10-03 | 合肥天翔环境工程有限公司 | Sewage-treatment plant |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |