CN202762323U - Supporting framework net for dynamic particle film and dynamic particle film assembly - Google Patents
Supporting framework net for dynamic particle film and dynamic particle film assembly Download PDFInfo
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- CN202762323U CN202762323U CN 201220415135 CN201220415135U CN202762323U CN 202762323 U CN202762323 U CN 202762323U CN 201220415135 CN201220415135 CN 201220415135 CN 201220415135 U CN201220415135 U CN 201220415135U CN 202762323 U CN202762323 U CN 202762323U
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Abstract
The utility model discloses a supporting framework net for a dynamic particle film and a dynamic particle film assembly. The supporting framework net is used for forming the particle film on at least one lateral side, the supporting framework net is rigid in a first direction and is flexible in a second direction, and the first direction and the second direction are opposite. By means of the supporting framework net and the dynamic particle film assembly, the supporting framework net can be flexibly deformed in a preset degree during backwashing, so that the dynamic particle film deposited on the framework net is cracked and can fall from the framework net easily, and backwashing efficiency is improved. In addition, due to the fact that the supporting framework net is rigid during operation, additional supporting components such as a supporting plate can be saved, and cost of the whole dynamic particle film assembly is reduced.
Description
Technical field
The utility model relates to feedwater or sewage treatment area, and relates in particular to the dynamic particle membrane module that uses in feedwater or sewage treatment area and the support frame net that is used for this dynamic particle film.
Background technology
For domestic water that cleaning is provided etc. and also in order industrial wastewater, sanitary sewage etc. to be processed to prevent these waste water to environment, need to carry out filtration treatment to feedwater or waste water, to filter the pollutant in the water.
The dynamic particle film more and more comes into one's own as a kind of comparatively novel filter utility.The dynamic particle film is to realize the filter capacity of being scheduled to by the repeatedly plated film on filter screen, and therefore, the dynamic particle film has microfiltration membranes and the not available advantage of milipore filter that common high molecular materials is made.
Usually include a large amount of solid particle polluters in feedwater or sewage, these solid particle polluters are by filtering, and isolate from water, and these isolated impurity might be deposited on the surface of filter membrane and cause thus the dirt of filter membrane stifled.The film that general macromolecular material is made in case it is stifled that the dirt of film occurs, just needs to clean, or online or off-line cleans, if when membrane flux is difficult to recover, then needs to change film.No matter be to clean or change film, the cost of polymer material film is all very high.And the dynamic particle film in case occur dirty stifled, can with the dynamic particle film together with its dirt of holding back together backwash go out system, and on filter screen plated film again.On filter screen, again be coated with the cost of dynamic particle film far below changing the common high molecular materials film.In addition, the dynamic particle film is except the film forming cost is very low, and it is also much lower than common high molecular materials film that it filters energy consumption.Therefore, the dynamic particle film can become the substitute products of common high molecular materials film in a lot of fields.
For making the dynamic particle film have desirable filter area, need to use skeleton to support, so that flexible filter screen shows rigidity.The skeleton that adopts in the reality at present all is full rigidity, no matter where stressed this skeleton is, can not deform.In Chinese invention patent CN101555047, a kind of dynamic particle film support is disclosed for example.This dynamic particle film support comprises the skeleton of frame-type and flat supporting layer, and the filter screen and the base net that support the dynamic particle film are fixed on this flat supporting layer.Flat supporting layer is made of metal usually, comprising the three-dimensional duct, so that the water before filtering flows therein.The supporting network of dynamic particle film is fixed by welding on the both sides of this flat supporting layer, and carries out plated film at this supporting network, consists of final filtering film component.Be welded on the supporting layer by the supporting network with the dynamic particle film, so that the dynamic particle film keeps predetermined rigidity, the pressure in the time of can bearing malleation feedwater and negative pressure pumping water.
Although the supporting layer of this rigidity provides lot of advantages when filtering, but, as mentioned above, when the dirt of dynamic particle film is stifled, need to carry out backwash to the dynamic particle film, and the supporting layer of rigidity causes the dynamic particle film can not be out of shape when backwash, therefore for making filter gauze cleaning clean, just needs higher backwash hydraulic pressure and the more backwash water yield.Be unfavorable for saving water and energy and improving backwash efficiency.In addition, because flat supporting layer need to be provided in the base net of dynamic particle film, and flat supporting layer has complicated three-dimensional structure, also improved the manufacturing cost of whole filtering film component.
The utility model content
In order to solve the aforementioned problems in the prior, the purpose of this utility model is exactly to produce a kind of skeleton of one-way flexible, and skeleton and base net are united two into one, and becomes the skeleton with one-way flexible, can save material cost thus, and increase the function of one-way flexible.The one-way flexible function is very important when the filter screen backwash, and this is because the distortion of skeleton during backwash, makes that the dynamic particle film that is attached to screen surface deforms, breakage, thereby easilier comes off from filter screen.Like this, all comparatively considerable reduction and saving can be arranged to backwash hydraulic pressure and the water yield, thereby reach energy-saving and cost-reducing purpose.
To achieve these goals, according to the utility model, a kind of support frame net for the dynamic particle film is provided, this support frame net is used for forming membrana granulosa in its at least one side, this support frame net presents rigidity at first direction, and presenting predetermined flexibility in second direction, described first direction is opposite with described second direction.
Preferably, described support frame net comprises base net and is arranged on limit element on the side of described base net.
Described base net is the silk screen that warp and parallel consist of.
Described limit element is the gag lever post that is arranged on the side of described silk screen.
Described gag lever post is fixed on the side of described silk screen randomly along the parallel of described silk screen.
In addition, described limit element can be the limit convex on the side that is arranged on described silk screen.
Described limit convex comprises the element of a plurality of adjacent arrangements on warp direction, and this element is being trapezoidal perpendicular to the cross section on the direction of parallel, and this element is fixed on the described parallel along the limit of weft direction.
Described warp and parallel are formed by wire.
Alternatively, described base net is made of fuel plate, and is formed with a plurality of holes or opening on this fuel plate.
Described limit element is the gusset on the side that is set at random described fuel plate.
Described limit element is by punching press integrally formed gusset on described fuel plate, has the gap groove along short-axis direction on the described gusset.
Described fuel plate is metallic plate.
As another kind of embodiment, described support frame net is made of the base net that the wire rod braiding forms, and described wire rod is woven into so that described base net presents rigidity at first direction, and presents predetermined flexible in second direction.
Described base net comprises the multirow wire rod, and each line material comprises adjacent one another are and the upper ring and a lower ring of bending in opposite direction, and wherein the lower ring in delegation's wire rod is pressed on the pressed on ring of wire rod of another row that is adjacent.
The shape of described ring can be circle, rectangle, triangle, ellipse, polygon or other abnormity.
According on the other hand of the present utility model, a kind of dynamic particle membrane module is provided, this dynamic particle membrane module comprises the support frame net, be attached to the online filter screen of support frame and be deposited on the dynamic particle film of this filter screen, and described support frame net is above-mentioned any support frame net.
By adopting according to support frame net of the present utility model and dynamic particle membrane module, can be so that the support frame net carries out the plastic deformation of predetermined extent when backwash, thus so that be deposited on dynamic particle film cracking on this filter screen, cause this dynamic particle film easily to come off from filter screen, improved backwash efficiency.In addition, because this support frame net presents rigidity when operation, therefore, can save additional support elements such as adopting gripper shoe, reduce the cost of whole dynamic particle membrane module.
Description of drawings
Above of the present utility model and other purposes, feature and advantage will be by with reference to the accompanying drawings to becoming clearer in the detailed description of the preferred embodiment of the present utility model, among the figure:
Fig. 1 shows the schematic diagram of the dynamic particle film support assembly that uses in the prior art;
Fig. 2 A and 2B are the schematic diagrames that illustrates according to the dynamic particle film support frame net of the first embodiment of the present utility model;
Fig. 3 A and 3B are the schematic diagrames of explaining dynamic particle film support frame net operation principle shown in Figure 2;
Fig. 4 A and 4B are the schematic diagrames that illustrates according to the dynamic particle film support frame net of the second embodiment of the present utility model;
Fig. 5 A and 5B are the schematic diagrames of explaining dynamic particle film support frame net operation principle shown in Figure 4;
Fig. 6 is the schematic diagram that illustrates according to the dynamic particle film support frame net of the 3rd embodiment of the present utility model;
Fig. 7 A and 7B are the schematic diagrames of explaining dynamic particle film support frame net operation principle shown in Figure 6;
Fig. 8 A and 8B are the schematic diagrames that illustrates according to the dynamic particle film support frame net of the 4th embodiment of the present utility model; And
Fig. 9 A and 9B are the schematic diagrames of the dynamic particle film support frame net operation principle shown in key-drawing 8A and the 8B.
The specific embodiment
Below, describe in detail according to preferred embodiment of the present utility model with reference to accompanying drawing.It is to be noted, for the clear the utility model of describing, accompanying drawing is exaggerated expression, and is not to be drawn to scale, and therefore, the utility model is not limited to technical scheme shown in the drawings.
At first, describe situation of the prior art, Fig. 1 is the dynamic particle film support assembly that prior art is shown.As shown in Figure 1, dynamic particle film support assembly comprises flat supporting layer 101 and is arranged at framework 103 around the flat supporting layer 101, and framework 103 can be connected with flat supporting layer 101 by welding manner, in order to fixed support layer (net).Net 113 and veil 111 are arranged on two sides of this flat supporting layer 101 successively stackedly in support base net 115, the support.Water distribution path 10 5 is arranged in the framework 103, and by the internal communication of a plurality of intercommunicating pores 117 with flat supporting layer 101, in order to realize flowing of water.Wherein upper water-out mouth 107 is arranged at the upside of water distribution path 10 5.
In use, precoating paint will be smeared in advance on the supporting network of above-mentioned supporter assembly, such as active carbon etc.Supporter assembly after smearing is placed in the cesspool, so that the sewage submergence realizes the dynamic particle film support assembly of feedwater/sewage disposal.Use pump that the upper water-out mouth 107 of dynamic particle film support is drawn water, because the supporting network that is coated with precoating paint has suction-operated, when making sewage through supporting network, particle wherein is collected on the supporting network, forms the dynamic particle film.
After the moulding of dynamic particle film, begin sewage is filtered, make pump extract water purification out from upper water-out mouth 107.After after a while, when the gap on the face of dynamic particle film is stopped up by the impurity in the sewage, need to carry out backwash operation to dynamic particle film support 105.Can so that pump send water to upper water-out mouth 107, whole dynamic particle film be swept away from supporting network.
But, in above-mentioned dynamic particle film support assembly, the supporting network that comprises base net 115, middle net 113 and veil 111 is fixed on the flat supporting layer 101, and can not be out of shape by flat supporting layer 101 rigid support, when backwash, need for a long time thus and very large pressure could sweep away the dynamic particle film from supporting network.In addition, as shown in Figure 1, this dynamic particle film support assembly comprises the flat supporting layer 101 of framework 103 and grid configuration, the manufacturing difficulty of these parts, and manufacturing cost is high, so that the whole cost of dynamic particle film support assembly raises.
The application's designer is through research, a kind of novel dynamic particle film support frame net has been proposed, this dynamic particle film support frame net itself not only can play the effect of above-mentioned supporting network and flat supporting layer, and this support frame net presents rigidity in one direction, and present in an opposite direction certain flexibility, thus, in the backwash operation of dynamic particle film support frame net, this support frame net plastic deformation, so that be attached to the filter screen on the skeleton and be deposited on dynamic particle film distortion on the filter screen, damaged cracking, and be easy to peel off from filter screen and come off, thus, do not need very large pressure just the dynamic particle film can be got off from the supporting layer upper punch, and this backwash can be finished within very short time.
(the first embodiment)
Below with reference to Fig. 2 A, 2B, Fig. 3 A and Fig. 3 B, describe the dynamic particle film support frame net according to the first preferred embodiment of the present utility model in detail.
Shown in Fig. 2 A and 2B, skeleton 10 comprises the base net 100 that metal wire knitted forms and is fixed on base net 100 framework (not shown) all around, this base net is formed by parallel 101 and warp 102 braidings, parallel 101 and warp 102 are with predetermined density braiding, to form predetermined opening size, with the carrying base net as the dynamic particle film.
On a side of base net, be provided with some gag lever posts 103, this gag lever post 103 arranges along warp 102, and is arranged on the base net at random.This gag lever post 103 only with the many parallels 101 of its process in one (indicated such as Reference numeral 101A among Fig. 3 A and the 3B) such as fixing by modes such as welding, tie up, and be not connected with other parallels.The skeleton that so forms can be as described above, and deposited particles on its side forms dynamic particle film (not shown) thus.
Shown in Fig. 3 A and 3B, the partial enlarged view of the state when Fig. 3 A and 3B are illustrated in as shown in Figure 2 skeleton and are subject to External Force Acting.
As shown in Figure 3A, when skeleton 10 is subject to pressure along the direction (from right to left) shown in Fig. 3 A arrow A, namely, corresponding under dynamic particle film normal operation, when unfiltered water was mobile to the left from the right side of skeleton 100 under the pressure-acting of pump, base net 100 was subject to pressure left, thus, there is the trend of outstanding distortion left in base net 100, and for example, there is the trend that is moved to the left in the parallel 101A that fixes with gag lever post 101 with respect to its adjacent parallel.But owing to the gag lever post 103 on the right flank that is arranged on base net 100, this gag lever post 103 is fixed on this parallel 101A upward and has equally the trend that is moved to the left with this parallel 101A thus.But, because the length of this gag lever post 103 is so that they are at least two parallels 101, so that this gag lever post 103 is resisted against on other parallels, being moved to the left by other parallels of it stops thus, and then the mobile trend of the parallel 101A that fixes with this gag lever post 103 is prevented from.Thus, base net 100 presents rigidity, guarantees that unfiltered water steadying flows through the dynamic particle film.
After use after a while, and be in the situation that the dynamic particle film is blocked, apply rightabout current the dynamic particle film is carried out backwash.Shown in Fig. 3 B, that is, skeleton 10 is subject to the water flow pressure of the direction (from left to right direction) shown in arrow B among Fig. 3 B, and thus, base net 100 is to the outstanding distortion of the dextrad among the figure.For example, the parallel 101A that fixes with gag lever post 103 moves right with respect to its adjacent weft alignment, because other parallels do not play barrier effect to gag lever post on this direction, therefore, base net 100 can be out of shape in this direction, presents certain flexibility.The dynamic particle film (not shown) that the distortion of base net 100 causes being deposited on the base net 100 also is out of shape, and cracking, thus, easily separates with base net 100.Therefore, do not need very large pressure just can fast the dynamic particle film be swept away.Then can re-start coating film treatment through the skeleton 10 after the backwash, to form new dynamic particle film thereon.
The fineness wiry of skeleton, the fineness of gag lever post and length grade, and the pressure that can bear according to skeleton needs when filtering such as the layout density of gag lever post and the rigidity of requirement considers, and do not have particular restriction.
As mentioned above, because 10 of skeletons have rigidity on filtering direction, therefore, needn't provide support plate in the inboard of skeleton 10, thus, save material cost and simplify the structure.In addition, skeleton 10 can be made cylindric or tabular as required.
The warp of base net 100 and parallel can be made of wire, and still, the material of base net and gag lever post is not limited to metal, also can adopt resin etc.
(the second embodiment)
Below, with reference to Fig. 4 A, 4B and Fig. 5 A, 5B, the second embodiment according to dynamic particle film support frame net of the present utility model is described, wherein identical Reference numeral is used for representing identical parts, and omits the description that repeats.
The difference of the second embodiment and the first embodiment is, utilize limit convex 104 to substitute gag lever post in the first embodiments, shown in Fig. 4 A, this limit convex 104 in the cross section be a plurality of side by side trapezoidal 1041, and can be by flaky material, bending forms such as metallic plate.Limit convex 104 can be fixed on the base net 100 by various ways such as steel wire winding, welding, and can be fixed on the parallel 101 of base net 100 by it.In addition, in order to guarantee water, be formed with the (not shown)s such as a plurality of perforates or slit at limit convex 104.
Shown in Fig. 5 A and 5B, be subject to masterpiece time spent of the direction shown in the arrow A among Fig. 5 A at the skeleton 10 according to the second embodiment, opening between adjacent two row trapezoidal 1041 in the limit convex 104 is closed, and adjacent two row trapezoidal 1041 abut against each other thus, and have stoped base net 100 distortion.On the contrary, shown in Fig. 5 B, when the power of the direction shown in the arrow B in Fig. 5 B is applied on the skeleton 10, opening between adjacent two row trapezoidal 1041 in the limit convex 104 opens, thus, can not stop base net 100 distortion, so that skeleton 10 presents certain flexibility in this direction.
(the 3rd embodiment)
Below, with reference to Fig. 6 and Fig. 7 A, 7B, the 3rd embodiment according to the utility model dynamic particle film support frame net is described.
The difference of the 3rd embodiment and the first and second embodiments is: the 3rd embodiment is to realize by the weaving method of base net self, and does not have to arrange in addition the limit element such as gag lever post or limit convex.
As shown in Figure 6, be to utilize wire rod according to the skeleton 10 of the 3rd embodiment, form such as metal wire knitted.When braiding, so that in two adjacent row, for example in the second row of the first row of Reference numeral 101 expression and Reference numeral 102 expressions, lower ring 101B in the first row 101 is pressed on the pressed on ring 102A of the second row 102 that is adjacent and is located thereon, lower ring 102B in the second row 102 then is pressed on the pressed on ring 103A of the third line 103, that is to say, this base net is woven into wherein that the lower ring of delegation is pressed on the pressed on ring of adjacent lines.Thus, when the pressure that bears in the paper of outer sensing Fig. 6, shown in Fig. 7 A, each other fastening between each row of whole skeleton, thus restriction relatively rotates each other, thus, so that whole skeleton presents rigidity.And when bearing opposite pressure, during namely backwash, shown in Fig. 7 B, relatively rotating between each ring no longer is restricted, and thus, skeleton shows flexibility.
Thickness and the weaving manner of the wire rod of Weaving type skeleton are not particularly limited, and the pressure that it can the skeleton needs bear when filtering and the rigidity of requirement are considered.And also can adopt other weaving manner, as long as can be so that each row of skeleton or each other fastening when respectively being listed in the pressure that bears a direction, and when bearing rightabout pressure, deflection gets final product toward each other.
Although as shown in the figure, the upper ring and a lower ring of this wire rod be shaped as annular,, the utility model is not limited to this, the shape of ring can be circle, rectangle, triangle, ellipse, polygon or other abnormity.
(the 4th embodiment)
With reference to Fig. 8 A, 8B, Fig. 9 A and Fig. 9 B, the skeleton 10 according to the utility model the 4th embodiment is described.The skeleton 10 of the 4th embodiment is with the difference of the skeleton of above-mentioned embodiment, and the base net in the skeleton of the 4th embodiment forms by processing such as punching press, borings by certain thickness sheet material.This sheet material can be the sheet material of metallic plate or other materials, but is preferably metallic plate.
Specifically, shown in Fig. 8 A and 8B, the substrate 100 that metallic plate consists of is formed with a plurality of holes 110 by punching press, boring etc., and the size in hole and quantity are to decide according to the final desired discharge capacity of dynamic particle film that forms.On a side of substrate 100, be provided with randomly many gussets 120.This gusset 120 can form at substrate 100 by punching press, perhaps can wait the gusset that will form separately to be fixed on the substrate 100 by welding.Be formed with slit 121 on the gusset 120, and this gusset only is arranged on the side of substrate 100, therefore so that the rigidity of two sides of substrate difference to some extent.Setting party by changing gusset is to, length, height and density etc., the flexibility that can regulate formed substrate 100.
Shown in Fig. 9 A, substrate 100 is when the side shown in the arrow A upwards pressure in being subject to figure, because the existence of gusset 120, and stop substrate 100 distortion.And opposite, when substrate 100 was subject to that the side shown in the arrow B upwards pressure among the figure, owing to not existing the slit 121 in gusset 120 and the gusset 120 to open on the stress surface of substrate 100, therefore, substrate 100 presented certain flexibility.
The height of the thickness of substrate, percent opening and gusset, length, distribution arrangement and density etc. can the skeleton needs bear when filtering pressure and the rigidity of requirement determine.In addition, also skeleton can be formed cylindrical shape or plate.
Above, with reference to accompanying drawing, describe in detail according to a plurality of preferred embodiments of the present utility model, still, it is to be noted, top description only is exemplary, and should not consist of restriction of the present utility model.Do not deviating under the marrow prerequisite of the present utility model, those skilled in the art can make multiple modification, replacement or modification to above-mentioned embodiment, and these modifications, replacement and modification all should fall in the scope of the present utility model that limits such as appending claims.
Claims (16)
1. support frame net that is used for the dynamic particle film, this support frame net is used at its at least one side upper support filter screen to form membrana granulosa, it is characterized in that, this support frame net presents rigidity at first direction, and presenting predetermined flexibility in second direction, described first direction is opposite with described second direction.
2. support frame net as claimed in claim 1 is characterized in that, described support frame net comprises base net and is arranged on limit element on the side of described base net.
3. support frame net as claimed in claim 2 is characterized in that, described base net is the silk screen that warp and parallel consist of.
4. support frame net as claimed in claim 3 is characterized in that, described limit element is the gag lever post that is arranged on the side of described silk screen.
5. support frame net as claimed in claim 4 is characterized in that, described gag lever post is fixed on the side of described silk screen randomly along the parallel of described silk screen.
6. support frame net as claimed in claim 3 is characterized in that, described limit element is the limit convex that is arranged on the side of described silk screen.
7. support frame net as claimed in claim 6, it is characterized in that, described limit convex comprises the element of a plurality of adjacent arrangements on warp direction, and this element is being trapezoidal perpendicular to the cross section on the direction of parallel, and this element is fixed on the described parallel along the limit of weft direction.
8. such as each described support frame net in the claim 3 to 7, it is characterized in that, described warp and parallel are formed by wire.
9. support frame net as claimed in claim 2 is characterized in that, described base net is made of fuel plate, and is formed with a plurality of holes or opening on this fuel plate.
10. support frame net as claimed in claim 9 is characterized in that, described limit element is provided with slit for the gusset on the side that is set at random described fuel plate on this gusset.
11. support frame net as claimed in claim 9 is characterized in that, described limit element is by punching press integrally formed gusset on described fuel plate, is provided with slit on this gusset.
12. such as each described support frame net in the claim 9 to 11, it is characterized in that, described fuel plate is metallic plate.
13. support frame net as claimed in claim 1, it is characterized in that, described support frame net is made of the base net that the wire rod braiding forms, and described wire rod is woven into so that described base net presents rigidity at first direction, and presents predetermined flexible in second direction.
14. support frame net as claimed in claim 13, it is characterized in that, described base net comprises the multirow wire rod, and each line material comprises adjacent one another are and the upper ring and a lower ring of bending in opposite direction, and wherein the lower ring in delegation's wire rod is pressed on the pressed on ring of wire rod of another row that is adjacent.
15. support frame net as claimed in claim 14 is characterized in that, described ring be shaped as circle, rectangle, triangle, ellipse, polygon or other abnormity.
16. a dynamic particle membrane module comprises the support frame net and is deposited on the online dynamic particle film of this support frame that it is characterized in that, described support frame net is such as each described support frame net in the claim 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415135 CN202762323U (en) | 2012-08-20 | 2012-08-20 | Supporting framework net for dynamic particle film and dynamic particle film assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415135 CN202762323U (en) | 2012-08-20 | 2012-08-20 | Supporting framework net for dynamic particle film and dynamic particle film assembly |
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| Publication Number | Publication Date |
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| CN202762323U true CN202762323U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220415135 Withdrawn - After Issue CN202762323U (en) | 2012-08-20 | 2012-08-20 | Supporting framework net for dynamic particle film and dynamic particle film assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103623710A (en) * | 2012-08-20 | 2014-03-12 | 贺大立 | Supporting framework net for dynamic granular film and dynamic granular film assembly |
| CN112169445A (en) * | 2020-08-26 | 2021-01-05 | 南京苏环环境互联科技有限公司 | Filter screen and sewage treatment device and method |
-
2012
- 2012-08-20 CN CN 201220415135 patent/CN202762323U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103623710A (en) * | 2012-08-20 | 2014-03-12 | 贺大立 | Supporting framework net for dynamic granular film and dynamic granular film assembly |
| CN103623710B (en) * | 2012-08-20 | 2016-08-17 | 贺大立 | Support frame net and dynamic particle membrane module for dynamic particle film |
| CN112169445A (en) * | 2020-08-26 | 2021-01-05 | 南京苏环环境互联科技有限公司 | Filter screen and sewage treatment device and method |
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Granted publication date: 20130306 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |